This paper presents a new multilevel topology based on cascaded hybrid multi-level (HCS)
inverter. There are different topologies for cascaded inverters for reducing the switches, power loss. The output
voltage is increased and the number of switches is reduced with the HCS inverter. Due to this reduction in
number of on-state switches, power loss and voltage drop is reduced. Simulation results for 11 level symmetric
form of converter is described.
This paper presents the three-phase CHB inverter fed induction motor suitable for renewable energy source applications. Normally, all present existing multilevel inverters produce multilevel output, but the number of components required is more, bulk in size, more in cost. Which are more burdens to small capacity renewable sources. These challenges are eliminated in CHB inverter. This CHB mainly consisting of one DC source, one capacitor and eight switches in each phase. To generate a five-level output in phase to ground voltage, it is required to maintain the capacitor voltage (V2) at fifty percent of the DC source voltage (V1). This capacitor voltage is regulated by a sensor less voltage regulating technique. The sensor less voltage regulation works without any sensor devices. We can implement this technique with very less cost compared to other techniques. The sensor less voltage regulation is realized by level-shifted sinusoidal pulse width modulation. The simulation results show a very good dynamic performance. Controller maintains the capacitor voltage at fifty percent of the source voltage irrespective of main source voltage changes and load changes. Inverter generates a five-level wave at the output from line to ground and seven-level wave from line to line with fewer Harmonic. It is implemented in matlab/simulink and showing good dynamic performance.
With the purpose of rein in the high voltage of flexible power systems, renovation and
amendment of multi-level structures aimed at acquisition of high quality voltage is certainly required. In this
regard, robust topology must be occupied that encompass the maximum output voltage levels along with
minimum of switch number, of course, with taking into account of Peak Inverse Voltage (PIV). In this
paper, a neoteric high-performance multilevel cascaded inverter is suggested up to the problem of
repetitive output levels to be unraveled and also number of output voltage levels to be maximized. It has
been constructed by series-connected multilevel inverters blocks and three-level inverter. The simulation
results along with experimental results extracted by manufactured prototype have transparently approved
high efficiency of proposed inverter as well as its feasibility. Apart from above, new mathematical approach
has been presented to calculate and define the DC voltage sources magnitudes in asymmetric converter.
Comparative Analysis of Various Z-source Based Five Level Cascaded H-bridge M...journalBEEI
Z-source based multilevel inverters are the recent topologies as they have boosting ability and near sinusoidal output waveforms. This paper proposes different inverter topologies such as Z-source multilevel inverter and quasi Z-source multilevel inverter. This paper also deals with switched inductor and improved switched inductor topologies with quasi Z-network. The proposed switched inductor system reduces the voltage stresses caused by capacitors, power devices and diodes. In addition to multilevel inverter advantages, the proposed configuration employs Z-source inverter advantages. The Z-source inverter as compared to the traditional inverter is less costly, less complex, more efficient and more reliable. The performance of the proposed configurations is analysed by varying passive elements in impedance network and is simulated in MATLAB/SIMULINK. Phase disposition (PD) pulse width modulation (PWM) technique is applied on the proposed configurations and performance parameters are measured by the fast Fourier transform FFT analysis. The object of this paper is to develop an inverter which is used for variable speed drives with increase in output voltage by eliminating transformer and filter circuit. The performance is checked with standared parameter of the inverter.
Asymmetric Multilevel Inverter of 11-level Cascaded H-Bridge with Renewable S...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Comparison of symmetrical and asymmetrical cascaded current source multilevel...eSAT Journals
Abstract This paper presents symmetrical and asymmetrical cascaded multilevel inverter approach for high power output applications. It is based on the cascade connection of the H-bridge inverter cells. Comparison of symmetrical and asymmetrical current source multi level inverter is shown using 2 H-bridge inverter cells with cascade connection. Now ever by the supplies which are in GP with different ratios like 2,3,etc. Structural and operational characteristics are discussed and their inherent advantages are shown. Simulation using Matlab Simulink is done to verify the performance. Simulation and results for this proposed scheme are presented in this paper. Index Terms: Asymmetrical cascaded multilevel inverter, Current source multi level inverter, MATLAB Simulink, Optimization angle control, Symmetrical multi level inverter, Total harmonic distortion (THD).
A New Configuration of Asymmetric Multilevel Converter to Maximize the Number...IJMTST Journal
The multilevel converters are increasingly becoming popular because of its high power applications. This research paper describes about the new structure that can produce increased number of output voltage waveform using a single source and reduced number of power electronic components. In designing a multilevel converter, the power electronic switches play a very imperative role as it describes the installation area, cost, configuration complexity and may more things that play a significant role while designing. The prime function of multilevel converter is to abolish total harmonic distortion and to incorporate desired ac voltage from several separate dc sources. Each level consists of H-Bridge converter units. High efficiency, high voltage capability, lower switching losses are its prime advantages. A multilevel power converter structure can be introduced as an alternative in medium voltage and high power situations. This structure not only achieves high power ratings but also empower the use of renewable energy sources. It finds its basic application in adjustable speed drives, Static Compensator (STATCOM).
Usage of high power and medium voltage applications in domestic and industrial purpose has been increased in the recent years. Also, the penetration of renewable energy sources is increasing rapidly. To make use the renewable energy sources there is a need of using inverters. The basic inverter is conventional two level inverter which produces the square wave output voltage. The major drawback of conventional inverter is it contains more harmonics. Therefore, multilevel inverters have been introduced with staircase output voltage waveform. Lot of multilevel inverter topologies have been developed and cascaded H bridge type is the more frequently used. But, it requires more number of switches for higher output voltage level. In this paper, a novel 7 level asymmetrical multilevel inverter topology is proposed with less number of switches. This proposed topology is compared with already existing topology. The simulation of circuit and result analysis of the circuit is carried out by using Matlab/simulink software. The comparison between existing topology and proposed topology is given. The results are discussed and presented.
This paper presents the three-phase CHB inverter fed induction motor suitable for renewable energy source applications. Normally, all present existing multilevel inverters produce multilevel output, but the number of components required is more, bulk in size, more in cost. Which are more burdens to small capacity renewable sources. These challenges are eliminated in CHB inverter. This CHB mainly consisting of one DC source, one capacitor and eight switches in each phase. To generate a five-level output in phase to ground voltage, it is required to maintain the capacitor voltage (V2) at fifty percent of the DC source voltage (V1). This capacitor voltage is regulated by a sensor less voltage regulating technique. The sensor less voltage regulation works without any sensor devices. We can implement this technique with very less cost compared to other techniques. The sensor less voltage regulation is realized by level-shifted sinusoidal pulse width modulation. The simulation results show a very good dynamic performance. Controller maintains the capacitor voltage at fifty percent of the source voltage irrespective of main source voltage changes and load changes. Inverter generates a five-level wave at the output from line to ground and seven-level wave from line to line with fewer Harmonic. It is implemented in matlab/simulink and showing good dynamic performance.
With the purpose of rein in the high voltage of flexible power systems, renovation and
amendment of multi-level structures aimed at acquisition of high quality voltage is certainly required. In this
regard, robust topology must be occupied that encompass the maximum output voltage levels along with
minimum of switch number, of course, with taking into account of Peak Inverse Voltage (PIV). In this
paper, a neoteric high-performance multilevel cascaded inverter is suggested up to the problem of
repetitive output levels to be unraveled and also number of output voltage levels to be maximized. It has
been constructed by series-connected multilevel inverters blocks and three-level inverter. The simulation
results along with experimental results extracted by manufactured prototype have transparently approved
high efficiency of proposed inverter as well as its feasibility. Apart from above, new mathematical approach
has been presented to calculate and define the DC voltage sources magnitudes in asymmetric converter.
Comparative Analysis of Various Z-source Based Five Level Cascaded H-bridge M...journalBEEI
Z-source based multilevel inverters are the recent topologies as they have boosting ability and near sinusoidal output waveforms. This paper proposes different inverter topologies such as Z-source multilevel inverter and quasi Z-source multilevel inverter. This paper also deals with switched inductor and improved switched inductor topologies with quasi Z-network. The proposed switched inductor system reduces the voltage stresses caused by capacitors, power devices and diodes. In addition to multilevel inverter advantages, the proposed configuration employs Z-source inverter advantages. The Z-source inverter as compared to the traditional inverter is less costly, less complex, more efficient and more reliable. The performance of the proposed configurations is analysed by varying passive elements in impedance network and is simulated in MATLAB/SIMULINK. Phase disposition (PD) pulse width modulation (PWM) technique is applied on the proposed configurations and performance parameters are measured by the fast Fourier transform FFT analysis. The object of this paper is to develop an inverter which is used for variable speed drives with increase in output voltage by eliminating transformer and filter circuit. The performance is checked with standared parameter of the inverter.
Asymmetric Multilevel Inverter of 11-level Cascaded H-Bridge with Renewable S...theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Comparison of symmetrical and asymmetrical cascaded current source multilevel...eSAT Journals
Abstract This paper presents symmetrical and asymmetrical cascaded multilevel inverter approach for high power output applications. It is based on the cascade connection of the H-bridge inverter cells. Comparison of symmetrical and asymmetrical current source multi level inverter is shown using 2 H-bridge inverter cells with cascade connection. Now ever by the supplies which are in GP with different ratios like 2,3,etc. Structural and operational characteristics are discussed and their inherent advantages are shown. Simulation using Matlab Simulink is done to verify the performance. Simulation and results for this proposed scheme are presented in this paper. Index Terms: Asymmetrical cascaded multilevel inverter, Current source multi level inverter, MATLAB Simulink, Optimization angle control, Symmetrical multi level inverter, Total harmonic distortion (THD).
A New Configuration of Asymmetric Multilevel Converter to Maximize the Number...IJMTST Journal
The multilevel converters are increasingly becoming popular because of its high power applications. This research paper describes about the new structure that can produce increased number of output voltage waveform using a single source and reduced number of power electronic components. In designing a multilevel converter, the power electronic switches play a very imperative role as it describes the installation area, cost, configuration complexity and may more things that play a significant role while designing. The prime function of multilevel converter is to abolish total harmonic distortion and to incorporate desired ac voltage from several separate dc sources. Each level consists of H-Bridge converter units. High efficiency, high voltage capability, lower switching losses are its prime advantages. A multilevel power converter structure can be introduced as an alternative in medium voltage and high power situations. This structure not only achieves high power ratings but also empower the use of renewable energy sources. It finds its basic application in adjustable speed drives, Static Compensator (STATCOM).
Usage of high power and medium voltage applications in domestic and industrial purpose has been increased in the recent years. Also, the penetration of renewable energy sources is increasing rapidly. To make use the renewable energy sources there is a need of using inverters. The basic inverter is conventional two level inverter which produces the square wave output voltage. The major drawback of conventional inverter is it contains more harmonics. Therefore, multilevel inverters have been introduced with staircase output voltage waveform. Lot of multilevel inverter topologies have been developed and cascaded H bridge type is the more frequently used. But, it requires more number of switches for higher output voltage level. In this paper, a novel 7 level asymmetrical multilevel inverter topology is proposed with less number of switches. This proposed topology is compared with already existing topology. The simulation of circuit and result analysis of the circuit is carried out by using Matlab/simulink software. The comparison between existing topology and proposed topology is given. The results are discussed and presented.
Comparison of Multilevel Inverter Topologies for STATCOM ApplicationsIJERA Editor
In this paper is to present an comparison of four different STATCOM multilevel inverter topologies which are suitable to be connected to the un-linear loads and unbalancing loads. The majority of power consumption has been drawn in reactive loads. These loads are drawn in low power factor and therefore give rise to reactive power burden in the power system. So that STATCOM controller is used to compensate reactive power, correction of power factor and elimination of current harmonics. This paper mainly focuses the analysis issues of the Cascade H-bridge, Incremental cascade H-bridge, Incremental cascade I–bridge and Incremental – reduction cascade H-bridge multilevel topologies with PWM technique for STATCOM applications; Inverter operation play a vital in STATCOM, presenting a methods for best suitable in the point of low THD, better output, cost and efficiency. MATLAB/SIMULINK results are present in this paper of multilevel inverter four topologies for STATCOM applications with Instantaneous p – q theory controller implemented.
Analysis and hardware implementation of five level cascaded H Bridge inverterIJERA Editor
The cascaded multilevel inverter (CMLI) has gained much attention in recent years due to its advantages in high
voltage and high power with low harmonics applications. A standard cascaded multilevel inverter requires n DC
sources for 2n+1levels at the output, where n is the number of inverter stages. This paper presents a topology to
control cascaded multilevel inverter that is implemented with multiple DC sources to get 2"+1_ 1 levels. Without
using Pulse Width Modulation (PWM) technique, the firing circuit can be implemented using Microcontroller
which greatly reduces the Total Harmonic Distortion (THD) and switching losses. To develop the model of a
cascaded hybrid multilevel inverter, a simulation is done based on MATLAB/SIMULINK software and
hardware implementation was also done. Their integration makes the design and analysis of a hybrid multilevel
inverter more complete and detailed.
This paper deals with the design of cascaded 11 level H- bridge inverter. It includes a comparison between the 11 level H-bridge and T-bridge multilevel inverter. The cascaded inverter of higher level is a very effective and practical solution for reduction of total harmonic distortion (THD).These cascaded multilevel inverter can be used for higher voltage applications with more stability. As the level is increased the output waveform becomes more sinusoidal in nature. The inverter is designed using multicarrier sinusoidal pulse width modulation technique for generating triggering pulses for the semiconductor switches used in the device. Through this paper it will be proved that a cascaded multilevel H-bridge topology has higher efficiency than a T-bridge inverter, as whichever source input voltage is provided since input is equal to the output voltage. In T-bridge inverter, the output obtained is half of the applied input, so efficiency is just half as compared to H-bridge. The output waveform is distorted and has higher THD. The simulation is performed using MATLAB /Simulink 2013 software.
39 9146 a novel single source multi output (edit lafi)IAESIJEECS
This paper presents a novel single DC input source and multiple DC output suitable for switched mode power supply (SMPS) applications integrating interleaved boost and sepic converter with fly back topology. The proposed converter can be remodeled for any required output voltage power supply without changing hardware structure because wide range of output voltage can be obtained using sepic and boost converters by changing duty cycle command by implementing a simple voltage input pi controller. Conventional fly back topology is added to interleaved circuit to produce desired dc output voltage this voltage can be controlled by choosing turns ratio of fly back transformer. The proposed multi output DC converter is simulated in MATLAB/Simulink environment and results are presented for verifying merits of the converter.
Cascaded H-BRIDGE Converter for Domestic ApplicationsIJTET Journal
Multilevel inverters have recently found its way in to the high power applications in both domestic and industrial fields with its ability of low switching frequency. Out of all the topologies of a multilevel inverter, the cascaded H-bridge inverter is most commonly used due to its modular topology. This paper presents a five level cascaded multilevel inverter whose dc voltage source is charged by a solar panel. The switching is done by PIC microcontroller. The programming of the microcontroller is done using MPLAB programmer. Topology is designed with minimum size, weight & reduced power losses. The simulation work is done using MATLAB and experimental results have been presented to validate the theory.
Power Quality Enhancement Using the Interline Power Flow ControllerIJPEDS-IAES
Interline power flow controller (IPFC) is one of the latest generation Flexible
AC Transmission system (FACTS). It is able to control simultaneously the
power flow of multiple transmission lines. This paper presents a study of the
impact the IPFC on profile of voltage, real and reactive power flow in
transmission line in power system. The results without and with IPFC are
compared in terms of voltage and active power flows to demonstrate the
performance of the IPFC model.
Design of New Single-phase Multilevel Voltage Source InverterIAES-IJPEDS
Multilevel inverters with more number of levels can produce high quality voltage waveforms. In this paper, a new single-phase structure for multilevel voltage source inverter is proposed which can generate a large number of levels with reduced number of IGBTs, gate driver circuits and diodes. Three algorithms for determination of dc voltage sources’ magnitudes are presented which provide odd and even levels at the output voltage waveform. A comparison is presented between proposed multilevel inverter and conventional cascade topology. The proposed topology is analyzed by the experimental and simulation results.
CHB VSI Based Shunt Active Power Filter for PV Connected DSTATCOM in Three Ph...ijsrd.com
This paper presents a compensating system for the harmonic currents, the reactive power and source neutral conductor current in three-phase four-wire distribution system by using a five-level cascaded H-bridge voltage source inverter (CHB-VSI) based shunt active power filter (SAPF). A controller based on the d-q-0 theory (synchronous reference frame) and in-phase disposition (IPD) modulation technique is introduced for the SAPF. The distribution network which supplies mixed non-linear loads and employing CHB-VSI based SAPF is simulated by MATLAB/SIMULINK software. The performance of SAPF is analyzed by using the proposed control technique on the total harmonic distortion of source current, power factor and reactive power. Besides, it is illustrated by extensive simulation results, the effectiveness of five-level SAPF on source neutral conductor current.
Application of PWM Control Strategy on Z-Source Isolated Dual active bridge D...IJMER
This project presents a Z-source with bidirectional dc–dc converter. The switching count is
reduced by adding a passive element. Thus, we are improving the output voltage level. The voltage
regulation range of proposed converter is better than that of the traditional bidirectional dc–dc
converter. The fully bridge symmetrical circuit configuration, is neither a high-voltage side nor a lowvoltage
side in the circuit structure, and the sources connected to the dc side of each H-bridge circuit
with voltage sources and current sources. This method can reduce current stress and improves the
system efficiency.
In this paper we are presenting a dual active bridge (DAB) dc–dc converter is also known as
Bidirectional DC-DC converter. Both simulation results are shown by using MATLAB software.
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Implementation of Cascaded H Bridge Control Scheme for SSSC using Zero Sequen...ijtsrd
This paper focuses on a control scheme of cascaded H bridge scheme implemented in SSSC for enhance the three phase power systems. Cascaded H bridge based SSSC has offer low switching losses and less total harmonics distortion, and reduces the number of circuit components. Each H bridge cell has isolated dc capacitors which is exist balanced capacitor voltages. Since SSSC is often requested to operate under asymmetrical condition by power system faults such as one line grounding or two line short circuit and it can be the control output current almost freely. Cascaded H bridge based SSSC needs wide range of margin of dc voltage for operates in large unbalanced voltage power system. This proposed system focused on to avoids wide range of margin of dc voltage by exclusively using the two methods such has zero sequence voltage and negative sequence current. By this scheme, the SSSC is allowed to operate under asymmetrical condition by power system faults. The validity is examined by digital simulation under one line and two line fault in power system. M. Subalakshmi | A. Rathinam ""Implementation of Cascaded H-Bridge Control Scheme for SSSC using Zero Sequence Voltage and Negative Sequence Current"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-2 , February 2020,
URL: https://www.ijtsrd.com/papers/ijtsrd30063.pdf
Paper Url : https://www.ijtsrd.com/engineering/electrical-engineering/30063/implementation-of-cascaded-h-bridge-control-scheme-for-sssc-using-zero-sequence-voltage-and-negative-sequence-current/m-subalakshmi
Harmonic Distortion Analysis of Output Voltage in Multilevel Cascaded H-bridg...paperpublications3
Abstract: Multilevel inverter output voltage produce a staircase output waveform, this waveform look like a sinusoidal waveform. The multilevel output voltage having less number of harmonics compare to conventional bipolar inverter output voltage. The desired output of a multilevel inverter is synthesized by several sources of DC voltage. With an increasing number of DC voltage sources, the converter output voltage waveform approaches nearly sinusoidal waveform while using a fundamental switching frequency scheme.
Based on the topology multilevel inverters are classified as: (i) Diode-clamped multi-level inverter (ii) Flying-capacitor multi-level inverter (iii) Cascaded H-bridge multi level inverter
While each of these converters fulfils the basic requirements of a multilevel inverter advantages, there are also some disadvantages associated with them.
(i) A diode clamped inverter uses many clamping diodes with the increase in level in output voltage. The diode reverse voltage rating differs for each level and has to be calculated each time as the number of level increases.
(ii) In flying capacitor inverter, the number of storage capacitors required increases with increase in levels. Balancing the charging and discharging rates of the capacitor is also a problem.
(iii) In cascaded H-bridge inverter which requires reduced number of electronic devices as compared to other two topologies, there is a drawback of increased number of sources with increase in the output voltage.
In this paper Harmonic distortion analysis of output voltage in a cascaded H-bridge multilevel inverter at different conduction angles is presented with the help of simulink / matlab.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
The conventional three-level inverter has been proposed to act as a recuperating converter in Traction Supply Substation. This converter is mainly used to feed back the regenerative braking energy to the grid. However, passive filter is desired to mitigate the current and voltage harmonics. Therefore, this paper investigates the possibility to use a seven-level Cascaded H-Bridge (CHB) converter as the recuperating converter without additional filtering. The proposed converter is modeled with MATLAB/Simulink simulation software. It is then simulated with two potential modulation schemes, namely Phase-Shifted PWM (PS-PWM) and Phase-Disposition PWM (PD-PWM). The quality of AC waveforms produced by these two modulation methods is compared and studied. The results show that PS-PWM technique is preferable for this application as it offered a clean AC current waveform with less than 5% harmonic distortion. However, a twenty-one-level CHB was predicted to comply with the 8% voltage harmonic requirement.
Implementation of Cascaded H-bridge MULTI-LEVEL INVERTEREditor IJMTER
The classical two level inverter produce output with levels either Vdc or -Vdc. The output
voltage waveform of ideal inverter should be sinusoidal but the waveform of conventional inverters
is non-sinusoidal and contains certain harmonics. Large capacitor is normally connected across the
DC voltage source and such a capacitor is costly and demands space. In order to overcome these
drawbacks Multi level inverters are introduced. The great advantage of this kind of inverter is the
minimum harmonic distortion obtained. Power electronics is the applications of power
semiconductor devices for the control and conversion of electric power such that these devices
operate as switches. An inverter is an electrical device that converts DC voltage to AC voltage; the
resulting AC can be at any required frequency. Multi-level inverters are nothing but the modification
of basic bridge inverters [1]. The multilevel inverter collectively converts the several levels of dc
voltage to a desired ac voltage. The unique structure of multilevel inverters allows them to reach
nearer to sinusoidal i.e., with low harmonics. In this project the work is done on five & nine level
multilevel inverter but the multilevel can be done up to any level and how many levels we increase
that much precise sinusoidal supply we can get i.e., we can reduce that many harmonics from the
supply. Simulation work is done using the MATLAB software
Analysis of dc capacitor voltage balance method for h bridge inverter based p...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
6.design fabrication and analysis of tri wheeled electric vehicle (2)EditorJST
In daily life we can observe the difficulties of carrying the patients, old people, physically handicapped in public places like airports, railway stations, bus stands, hospitals, college campuses etc. To aid such people we prepared an electric tri-car to ease the task of carrying them. Moreover, it is a multipurpose vehicle to carry pilgrims in pilgrim places, to carry inspection teams in industries, estates or campuses etc. The seating arrangement of this tri-car is such a way that the disabled can easily get into the vehicle and also get down. This tri-car is designed and analyzed with the help of the soft ware called PROE. Then analysis is done in Statistical and Modal Analysis. We modeled and fabricated a tri-car into a three wheeled electric powered vehicle with three seats and can accommodate two pillions and a driver. We designed the vehicle to be propelled by an electric hub motor mounted in the front wheel and powered by 48V Lithium-ion battery.
5. multi level inverter with simplified control strategy for distributed ener...EditorJST
Distributed generation (DG) provides stability to system reducing the power generation from plants
running with fossil fuels. With the advancements in power electronics, integration of distributed generation
became simple and cost effective. This paper illustrates the scheme of integrating of photo-voltaic (PV) system
as distributed generation to micro-grid. PV system is integrated to grid with three-level inverter and five-level
cascaded H-Bridge inverter to invert the type of supply synchronized to grid. Inverter will be controlled with
simple current control strategy. Results were presented for the proposed work considering cases like DG
sending only active power and DG injecting both active and reactive power through three-level and five-level
inverter topologies. Total harmonic distortion in source current and voltage of grid reduce when using multilevel
topology. Rate of change in voltage also reduces resulting in reduced filters when level at output of
inverter is increased.
Comparison of Multilevel Inverter Topologies for STATCOM ApplicationsIJERA Editor
In this paper is to present an comparison of four different STATCOM multilevel inverter topologies which are suitable to be connected to the un-linear loads and unbalancing loads. The majority of power consumption has been drawn in reactive loads. These loads are drawn in low power factor and therefore give rise to reactive power burden in the power system. So that STATCOM controller is used to compensate reactive power, correction of power factor and elimination of current harmonics. This paper mainly focuses the analysis issues of the Cascade H-bridge, Incremental cascade H-bridge, Incremental cascade I–bridge and Incremental – reduction cascade H-bridge multilevel topologies with PWM technique for STATCOM applications; Inverter operation play a vital in STATCOM, presenting a methods for best suitable in the point of low THD, better output, cost and efficiency. MATLAB/SIMULINK results are present in this paper of multilevel inverter four topologies for STATCOM applications with Instantaneous p – q theory controller implemented.
Analysis and hardware implementation of five level cascaded H Bridge inverterIJERA Editor
The cascaded multilevel inverter (CMLI) has gained much attention in recent years due to its advantages in high
voltage and high power with low harmonics applications. A standard cascaded multilevel inverter requires n DC
sources for 2n+1levels at the output, where n is the number of inverter stages. This paper presents a topology to
control cascaded multilevel inverter that is implemented with multiple DC sources to get 2"+1_ 1 levels. Without
using Pulse Width Modulation (PWM) technique, the firing circuit can be implemented using Microcontroller
which greatly reduces the Total Harmonic Distortion (THD) and switching losses. To develop the model of a
cascaded hybrid multilevel inverter, a simulation is done based on MATLAB/SIMULINK software and
hardware implementation was also done. Their integration makes the design and analysis of a hybrid multilevel
inverter more complete and detailed.
This paper deals with the design of cascaded 11 level H- bridge inverter. It includes a comparison between the 11 level H-bridge and T-bridge multilevel inverter. The cascaded inverter of higher level is a very effective and practical solution for reduction of total harmonic distortion (THD).These cascaded multilevel inverter can be used for higher voltage applications with more stability. As the level is increased the output waveform becomes more sinusoidal in nature. The inverter is designed using multicarrier sinusoidal pulse width modulation technique for generating triggering pulses for the semiconductor switches used in the device. Through this paper it will be proved that a cascaded multilevel H-bridge topology has higher efficiency than a T-bridge inverter, as whichever source input voltage is provided since input is equal to the output voltage. In T-bridge inverter, the output obtained is half of the applied input, so efficiency is just half as compared to H-bridge. The output waveform is distorted and has higher THD. The simulation is performed using MATLAB /Simulink 2013 software.
39 9146 a novel single source multi output (edit lafi)IAESIJEECS
This paper presents a novel single DC input source and multiple DC output suitable for switched mode power supply (SMPS) applications integrating interleaved boost and sepic converter with fly back topology. The proposed converter can be remodeled for any required output voltage power supply without changing hardware structure because wide range of output voltage can be obtained using sepic and boost converters by changing duty cycle command by implementing a simple voltage input pi controller. Conventional fly back topology is added to interleaved circuit to produce desired dc output voltage this voltage can be controlled by choosing turns ratio of fly back transformer. The proposed multi output DC converter is simulated in MATLAB/Simulink environment and results are presented for verifying merits of the converter.
Cascaded H-BRIDGE Converter for Domestic ApplicationsIJTET Journal
Multilevel inverters have recently found its way in to the high power applications in both domestic and industrial fields with its ability of low switching frequency. Out of all the topologies of a multilevel inverter, the cascaded H-bridge inverter is most commonly used due to its modular topology. This paper presents a five level cascaded multilevel inverter whose dc voltage source is charged by a solar panel. The switching is done by PIC microcontroller. The programming of the microcontroller is done using MPLAB programmer. Topology is designed with minimum size, weight & reduced power losses. The simulation work is done using MATLAB and experimental results have been presented to validate the theory.
Power Quality Enhancement Using the Interline Power Flow ControllerIJPEDS-IAES
Interline power flow controller (IPFC) is one of the latest generation Flexible
AC Transmission system (FACTS). It is able to control simultaneously the
power flow of multiple transmission lines. This paper presents a study of the
impact the IPFC on profile of voltage, real and reactive power flow in
transmission line in power system. The results without and with IPFC are
compared in terms of voltage and active power flows to demonstrate the
performance of the IPFC model.
Design of New Single-phase Multilevel Voltage Source InverterIAES-IJPEDS
Multilevel inverters with more number of levels can produce high quality voltage waveforms. In this paper, a new single-phase structure for multilevel voltage source inverter is proposed which can generate a large number of levels with reduced number of IGBTs, gate driver circuits and diodes. Three algorithms for determination of dc voltage sources’ magnitudes are presented which provide odd and even levels at the output voltage waveform. A comparison is presented between proposed multilevel inverter and conventional cascade topology. The proposed topology is analyzed by the experimental and simulation results.
CHB VSI Based Shunt Active Power Filter for PV Connected DSTATCOM in Three Ph...ijsrd.com
This paper presents a compensating system for the harmonic currents, the reactive power and source neutral conductor current in three-phase four-wire distribution system by using a five-level cascaded H-bridge voltage source inverter (CHB-VSI) based shunt active power filter (SAPF). A controller based on the d-q-0 theory (synchronous reference frame) and in-phase disposition (IPD) modulation technique is introduced for the SAPF. The distribution network which supplies mixed non-linear loads and employing CHB-VSI based SAPF is simulated by MATLAB/SIMULINK software. The performance of SAPF is analyzed by using the proposed control technique on the total harmonic distortion of source current, power factor and reactive power. Besides, it is illustrated by extensive simulation results, the effectiveness of five-level SAPF on source neutral conductor current.
Application of PWM Control Strategy on Z-Source Isolated Dual active bridge D...IJMER
This project presents a Z-source with bidirectional dc–dc converter. The switching count is
reduced by adding a passive element. Thus, we are improving the output voltage level. The voltage
regulation range of proposed converter is better than that of the traditional bidirectional dc–dc
converter. The fully bridge symmetrical circuit configuration, is neither a high-voltage side nor a lowvoltage
side in the circuit structure, and the sources connected to the dc side of each H-bridge circuit
with voltage sources and current sources. This method can reduce current stress and improves the
system efficiency.
In this paper we are presenting a dual active bridge (DAB) dc–dc converter is also known as
Bidirectional DC-DC converter. Both simulation results are shown by using MATLAB software.
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Implementation of Cascaded H Bridge Control Scheme for SSSC using Zero Sequen...ijtsrd
This paper focuses on a control scheme of cascaded H bridge scheme implemented in SSSC for enhance the three phase power systems. Cascaded H bridge based SSSC has offer low switching losses and less total harmonics distortion, and reduces the number of circuit components. Each H bridge cell has isolated dc capacitors which is exist balanced capacitor voltages. Since SSSC is often requested to operate under asymmetrical condition by power system faults such as one line grounding or two line short circuit and it can be the control output current almost freely. Cascaded H bridge based SSSC needs wide range of margin of dc voltage for operates in large unbalanced voltage power system. This proposed system focused on to avoids wide range of margin of dc voltage by exclusively using the two methods such has zero sequence voltage and negative sequence current. By this scheme, the SSSC is allowed to operate under asymmetrical condition by power system faults. The validity is examined by digital simulation under one line and two line fault in power system. M. Subalakshmi | A. Rathinam ""Implementation of Cascaded H-Bridge Control Scheme for SSSC using Zero Sequence Voltage and Negative Sequence Current"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-2 , February 2020,
URL: https://www.ijtsrd.com/papers/ijtsrd30063.pdf
Paper Url : https://www.ijtsrd.com/engineering/electrical-engineering/30063/implementation-of-cascaded-h-bridge-control-scheme-for-sssc-using-zero-sequence-voltage-and-negative-sequence-current/m-subalakshmi
Harmonic Distortion Analysis of Output Voltage in Multilevel Cascaded H-bridg...paperpublications3
Abstract: Multilevel inverter output voltage produce a staircase output waveform, this waveform look like a sinusoidal waveform. The multilevel output voltage having less number of harmonics compare to conventional bipolar inverter output voltage. The desired output of a multilevel inverter is synthesized by several sources of DC voltage. With an increasing number of DC voltage sources, the converter output voltage waveform approaches nearly sinusoidal waveform while using a fundamental switching frequency scheme.
Based on the topology multilevel inverters are classified as: (i) Diode-clamped multi-level inverter (ii) Flying-capacitor multi-level inverter (iii) Cascaded H-bridge multi level inverter
While each of these converters fulfils the basic requirements of a multilevel inverter advantages, there are also some disadvantages associated with them.
(i) A diode clamped inverter uses many clamping diodes with the increase in level in output voltage. The diode reverse voltage rating differs for each level and has to be calculated each time as the number of level increases.
(ii) In flying capacitor inverter, the number of storage capacitors required increases with increase in levels. Balancing the charging and discharging rates of the capacitor is also a problem.
(iii) In cascaded H-bridge inverter which requires reduced number of electronic devices as compared to other two topologies, there is a drawback of increased number of sources with increase in the output voltage.
In this paper Harmonic distortion analysis of output voltage in a cascaded H-bridge multilevel inverter at different conduction angles is presented with the help of simulink / matlab.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
The conventional three-level inverter has been proposed to act as a recuperating converter in Traction Supply Substation. This converter is mainly used to feed back the regenerative braking energy to the grid. However, passive filter is desired to mitigate the current and voltage harmonics. Therefore, this paper investigates the possibility to use a seven-level Cascaded H-Bridge (CHB) converter as the recuperating converter without additional filtering. The proposed converter is modeled with MATLAB/Simulink simulation software. It is then simulated with two potential modulation schemes, namely Phase-Shifted PWM (PS-PWM) and Phase-Disposition PWM (PD-PWM). The quality of AC waveforms produced by these two modulation methods is compared and studied. The results show that PS-PWM technique is preferable for this application as it offered a clean AC current waveform with less than 5% harmonic distortion. However, a twenty-one-level CHB was predicted to comply with the 8% voltage harmonic requirement.
Implementation of Cascaded H-bridge MULTI-LEVEL INVERTEREditor IJMTER
The classical two level inverter produce output with levels either Vdc or -Vdc. The output
voltage waveform of ideal inverter should be sinusoidal but the waveform of conventional inverters
is non-sinusoidal and contains certain harmonics. Large capacitor is normally connected across the
DC voltage source and such a capacitor is costly and demands space. In order to overcome these
drawbacks Multi level inverters are introduced. The great advantage of this kind of inverter is the
minimum harmonic distortion obtained. Power electronics is the applications of power
semiconductor devices for the control and conversion of electric power such that these devices
operate as switches. An inverter is an electrical device that converts DC voltage to AC voltage; the
resulting AC can be at any required frequency. Multi-level inverters are nothing but the modification
of basic bridge inverters [1]. The multilevel inverter collectively converts the several levels of dc
voltage to a desired ac voltage. The unique structure of multilevel inverters allows them to reach
nearer to sinusoidal i.e., with low harmonics. In this project the work is done on five & nine level
multilevel inverter but the multilevel can be done up to any level and how many levels we increase
that much precise sinusoidal supply we can get i.e., we can reduce that many harmonics from the
supply. Simulation work is done using the MATLAB software
Analysis of dc capacitor voltage balance method for h bridge inverter based p...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
6.design fabrication and analysis of tri wheeled electric vehicle (2)EditorJST
In daily life we can observe the difficulties of carrying the patients, old people, physically handicapped in public places like airports, railway stations, bus stands, hospitals, college campuses etc. To aid such people we prepared an electric tri-car to ease the task of carrying them. Moreover, it is a multipurpose vehicle to carry pilgrims in pilgrim places, to carry inspection teams in industries, estates or campuses etc. The seating arrangement of this tri-car is such a way that the disabled can easily get into the vehicle and also get down. This tri-car is designed and analyzed with the help of the soft ware called PROE. Then analysis is done in Statistical and Modal Analysis. We modeled and fabricated a tri-car into a three wheeled electric powered vehicle with three seats and can accommodate two pillions and a driver. We designed the vehicle to be propelled by an electric hub motor mounted in the front wheel and powered by 48V Lithium-ion battery.
5. multi level inverter with simplified control strategy for distributed ener...EditorJST
Distributed generation (DG) provides stability to system reducing the power generation from plants
running with fossil fuels. With the advancements in power electronics, integration of distributed generation
became simple and cost effective. This paper illustrates the scheme of integrating of photo-voltaic (PV) system
as distributed generation to micro-grid. PV system is integrated to grid with three-level inverter and five-level
cascaded H-Bridge inverter to invert the type of supply synchronized to grid. Inverter will be controlled with
simple current control strategy. Results were presented for the proposed work considering cases like DG
sending only active power and DG injecting both active and reactive power through three-level and five-level
inverter topologies. Total harmonic distortion in source current and voltage of grid reduce when using multilevel
topology. Rate of change in voltage also reduces resulting in reduced filters when level at output of
inverter is increased.
4. comparision of pifuzzy techniques for compensation of unbalanced voltages ...EditorJST
This paper proposes an effective controller for grid connected wind turbine based permanent magnet synchronous machine for improving unbalanced voltages. In this paper, we proposed a comparative analysis under different controllers like PI and Fuzzy Controller to PMSG system. A control structure is designed based on the positive sequence reference signals. With the help of these controllers, the double frequency oscillations in DC-link voltages and variations in active power can be eliminated. More ever, the proposed system can be implemented in Matlab/Simulink and the performance of the proposed Grid based PMSG wind system under grid fault conditions is verified.
Lars Helgeson, Founder & CEO of GreenRope, presents at the Small Business Web Summit in San Francisco. In his presentation he talks SaaS marketing and growing your business through resellers.
Current model predictive control for three-phase active power filter using ca...nooriasukmaningtyas
Different technologies in particular in the medium and high-power
conversion were implemented and taken into consideration in the last few
years. These inverter topologies have been demonstrated to ensure the
generation of high-quality voltage waveforms based on power half-conductor
switches, which operate on the fundamental frequency. The multilevel
inverter H-bridge is a promising alternative among the available multi-level
inverter topologies. A predictional current control algorithm for multi-level
converters and use on a three-phase cascaded inverter H-bridge. This article
reports on a comparison of two check methods associated with a shunt active
power filter based on the cascaded inverter of the three-Level type. The first
approach is the traditional PI control unit and the second is the predictive
current control unit. The reference current for the shunt active power filter is
provided by the p-q control strategy for reactive power compensation and
current harmonics. The cascade-type three-level inverter has more
advantages over a two-leaved inverter; the simulation output of APF is
checked by MATLAB/Simulink. The predictive controlled the APF
associated with the three-level inverter shows more performances and
efficiency compared to the conventional control algorithms.
This paper introduces a new topology of multilevel inverter, which is able to operate at high performance. This proposed circuit achieves requirements of reduced number of switches, gate-drive circuits, and high design flexibility. In most cases fifteen-level inverters need at least twelve switches. The proposed topology has only ten switches. The inverter has a quasi-sine output voltage, which is formed by level generator and polarity changer to produce the desired voltage and current waveforms. The detailed operation of the proposed inverter is explained. The theoretical analysis and design procedure are given. Simulation results are presented to confirm the analytical approach of the proposed circuit. A 15-level and 31-level multilevel inverters were designed and tested at 50 Hz.
Diode Free T-Type Five Level Neutral Point Clamped Inverter for Low Voltage D...IJTET Journal
Abstract—The multilevel inverter is used as a solution to increase the inverter operating voltage above the voltage limits of classical semiconductors. A Diode Free T-Type Five Level NPC inverter for Low Voltage DC System is proposed in this paper. The T-Type inverter topology is more efficient and conventional than I-type inverter topology. Considerable suppression of the harmonic current is the ultimate goal of multilevel inverter. Losses like Semiconductor loss, conduction loss are mainly due to IGBT & diode in the current path. So the proposed system is designed with cool MOSFET without diode. The middle bidirectional switch is replaced by two pair of MOSFET. Hence the five level NPC inverter is more significant for low and medium power range DC source and for Renewable energy system.
MLI Power Topologies and Voltage Eminence: An Exploratory Reviewijeei-iaes
Due to their performances and inherent edges, particularly in medium-voltage and dynamic applications, multilevel inverters have received associate degree increasing attention in universe industrial applications. This paper deals with a review of the most structure electrical converter topologies additionally their commonest derived and hybrid structures quoted in previous analysis works. It additionally encompasses associate degree investigation on voltage harmonic elimination and THD estimation. For that reason, the paper summarizes the foremost relevant modulation techniques used to date to boost the output voltage quality. Theoretical formulas elicited within the literature, for calculating the output voltage THD higher and lower bounds area unit reportable and verified by adequate simulations.
New Approaches for Harmonic Reduction Using Cascaded H-Bridge and Level Modulesijiert bestjournal
This paper analyzes and compares two approaches for dc to ac power conversion i.e. inverter . First method uses cascaded H - Bridge Inverter and second uses new Multi - level Scheme having Level Modules and H - Bridge. The simulation is done in MATLAB Software. Also the hardware can be done by taking the AC supply from the mains and converts it into DC suppl y by using rectifier. MOSFET can be used for switching purpose. The Total Harmon ic Distortion in output load voltage,produced by both the approaches is compared. It is shown that THD produced in second scheme is better up to a certain stages of the first scheme. The Total Harmonic Distortion produced in output load voltage when casca ded H - Bridge is used is 12.64% while t he Total Harmonic Distortion produced in output load voltage when Level Modules and H - Bridge are used is 7.94%.
Researchers have found interest in the multilevel inverters (MLI) owing to the low total harmonic distortion (THD) associated with their output voltage, as well as their low electromagnetic interference (EMI). The MLI represents an effective and feasible solution for enhancing power demand and minimizing AC waveforms’ harmonics as they generate a preferred level of output voltage as inputs from varying levels of DC voltages. In this paper, the performance of a seven-level cascaded H-bridge MLI with an asymmetrical number of power switches was evaluated. The simulation performance is shown to validate the operating principle of the single-phase cascaded H-bridge inverter. To control the MLI, a pulse width modulation approach was utilized. The operating principle of the MLI was verified via simulation using PSIM software.
This paper introduces a new hybrid topology of multilevel inverter capable of generating 21-level output voltage. The proposed topology is built using the combination of cross-switched bridge and a conventional full H-bridge. Compared to the conventional topologies and other hybrid topologies, the newly introduced multilevel inverter has the ability to maximize the number of voltage levels utilizing lower number of DC voltage sources, integrated bipolar transistor (IGBT) switches and gate drivers. A low frequency modulation technique is used to generate the ideal multilevel output voltage and gate pulses. Furthermore, the proposed topology is validated by building a hardware prototype and obtaining relevant experimental results. The acquired simulated and experimental results indicate the proper functioning of the proposed hybrid topology along with the compatibility of the applied modulation technique.
Fuzzy Logic Controlled Harmonic Suppressor in Cascaded Multilevel InverterIJPEDS-IAES
This paper presents an investigation of seven level cascaded H-bridge (CHB)
inverter in power system for compensation of harmonics. For power quality
control a Fuzzy Logic Control (FLC) giving comparatively better harmonic
reduction than the conventional controllers. Harmonic distortion is the most
important power quality problem stirring in multilevel inverter; the
harmonics can be eliminated by an optimal selection of switching angles. A
hybrid evaluation technique evaluates the obtained optimal switching angles
that are attained from the fuzzy inference system as well as neural network.
The proposed method will be implemented in MATLAB working platform
and the harmonic elimination performance will be evaluated.
Abstract: The output voltage of an inverter has in general non-sinusoidal shape. The required AC output quantity – frequency and voltage – is created by a sequence of segments properly cut out from the input variable quantity, which is a DC-voltage. The required output quantities, AC voltage amplitude and frequency, are created either from rectangular pulses or by the pulse-width- modulation (PWM). Power source with a non-sinusoidal voltage applied to a electric equipment brings some undesirable effects. For example, it can cause additional losses in the windings and ferromagnetic circuits of transformers. In AC motors the additional losses are higher and operating characteristics of motors are worse. In photovoltaic power sources, the use of inverters must be carefully considered, because a wide range of harmonics can be generated. This would greatly decline the quality of produced and transmitted electric energy. Demand for high-voltage, high power converters capable of producing of producing high-quality waveform while utilizing low voltage devices and reduced switching frequency has led to the multilevel inverter development with regard to semiconductor power switch voltage limit. In this paper an overview is presented of different Multilevel inverter techniques to reduce the total harmonic distortion of output voltage in a inverter.
Analysis and simulation of even-level quasi-Z-source inverterIJECEIAES
This research proposes a seven-level inverter with quasi-Z-source boost converters. The proposed topology employs a packed U-cell asymmetrical type multilevel inverter along with front-end quasi-Z-source networks. The quasi networks provide high gain compared to a conventional boost converter. This topology is the most suitable for photovoltaic multi-string applications. The proposed topology has the potential to supply both the alternating current (AC) and direct current (DC) type load. The inverter structure has a lower number of active switches which helps in the reduction of losses and improvement in efficiency. In this paper, the operation principle of a quasi-network and inverter circuit are explained in detail. In addition, the simulation results for various modulation indices are presented. In the MATLAB/Simulink environment, the architecture is proposed by using gated sinusoidal “Pulse width modulation”.
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
Multilevel inverters are emerging as the new breed of power converter options for high power applications. They typically synthesis the staircase voltage waveform (from several dc sources) which reduced harmonic content. This paper presents a simple selective harmonic elimination (SHE) modulation for single-phase cascaded H-bridge (CHB) multilevel inverter. The optimum switching angle of the transcendental equations describing the fundamental and harmonic components is solved by means of the Newton-Raphson (NR) method. The proposed SHE scheme is performed through simulation using MATLAB/Simulink. This simulation results are then verified through experiment using Altera DE0-Nano field-programmable gate array (FPGA). The proposed SHE is efficient in eliminating the lowest-order harmonics and producing a higher quality output waveform with a better harmonic profile.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
3. simulation of 11 level hybrid cascade stack (hcs) inverter with reduced number of switches (2)
1. Journal of Science and Technology (JST)
Volume 2, Issue 1, January2017, PP 15-18
www.jst.org.in
www.jst.org.in 15 | Page
Simulation of 11 Level Hybrid Cascade-Stack (HCS) Inverter
with Reduced Number of Switches
T.Appa Rao
(Instrument Technology, Gandhi Institute of Engineering and Technology, Gunpur, Orissa)
Abstract : This paper presents a new multilevel topology based on cascaded hybrid multi-level (HCS)
inverter. There are different topologies for cascaded inverters for reducing the switches, power loss. The output
voltage is increased and the number of switches is reduced with the HCS inverter. Due to this reduction in
number of on-state switches, power loss and voltage drop is reduced. Simulation results for 11 level symmetric
form of converter is described.
Keywords –Inverter, Switches, Leg-Inv, Cascade stack
I. INTRODUCTION
The development in the multilevel inverters for industry applications are increased today. The main use of
multilevel concept is to generate pure sinusoidal output signal with the help of dc link voltage. The concept of
multilevel inverters are classified in three configurations namely (a) diode clamped, (b) flying capacitors and (c)
cascaded type multilevel inverter. In case of diode clamped inverter it is not possible to obtain the balanced
voltages. Flying-capacitor inverters are used for medium voltages and have the advantages like equal voltage
stress on power switches, self balancing of capacitors and no need for a transformer. Cascade multilevel inverter
is designed by a series of half bridge, full bridge and other sources. General type cascaded multilevel inverter is
formed from H-Bridge units. H- Bridge consists of 4 switches in which pair of switches are operated in a
complementary fashion. Each inverter consists of a DC source that produces zero, positive and negative voltages
at its output terminal. H- Bridge consists of 4 switches. The proposed multilevel hybrid cascaded-stack (HCS) is
shown in figure 2. HCS is composed of four switches and two equal amplitude DC sources. In order to avoid the
undesirable conduction of a middle switch a directional switch is used in each unit.
II. COMPARISION STUDY
Figure 3 shows the configuration structure for HCS topology and from this system the output voltage generated
is 2Vn for nth
unit.
The range of voltages under symmetric configuration is expressed as:
Vi = V1; i = 1,2, ….n (1)
The output voltage obtained from the each basic unit is in terms of 2V1. Therefore, the output from the nth
unit is
expressed as,
V (n) = (4n - 1) V1 (2)
Fig 1. Cascaded H-bridge multilevel converter.
2. Journal of Science and Technology
www.jst.org.in 16 | Page
Fig 2. Proposed HCS topology under single basic unit.
Fig 3. Proposed HCS Converter.
The essential unit displayed in Figure 2 in the symmetric arrangement delivers a 11-level voltage waveform. Its
exchanging states are represented in Table 1. In view of this table, the operational rule of the HC-S multilevel
inverter will be a great deal more intelligible. The center bidirectional switch works in a reciprocal way with two
IGBTs on the top and base of the essential unit. Hence, it is on" when the finish and base IGBTs are off.
The DC voltage wellsprings of the HCS Inverter and the customary course inverter are equivalent
numerically, and equivalent to 2n + 1, where n is the no. of units. In some investigation, correlations are done by
number of bidirectional switches rather than the quantity of IGBTs, which brought about more prominent
lessening of number of switches. Along these lines, it is not precise examination.
3. Journal of Science and Technology
www.jst.org.in 17 | Page
The number of switches and Peak Inverse Voltage (PIV) in the proposed system is obtained as follows:
Nswitches = (m/2) + (5/2) (4)
Peak inverse Voltage (PIV) = (13/6)*m + (37/6) (5)
Table 2 Comparison of conventional cascaded multilevel inverter and Proposed HCS Inverter
III. SWITCHING POWER LOSSES
In general the losses in the proposed system are in 2 types:
1. IGBT switching losses
2. Power Loss in antiparallel diode
The power loss in the IGBT is given by
PIGBT, s =( Eon,s + Eoff,s ) fIGBT (6)
Where, PIGBT, s – Switching Power Loss in IGBT
Eon,s – Turn on loss in IGBT
Eoff,s – Turn off loss in IGBT
fIGBT – switching frequency
The power loss in antiparallel diode is given by,
Panti_D, =( Eon,anti_D + Eoff,anti_D ) fIGBT (7)
The conduction power loss rely on upon the quantity of moves, and they are affected by the adjustment strategy.
At long last, the aggregate conduction power loss can be figured as takes after:
(8)
Where n is determined by the switching pattern and indicates the number of turned-on IGBTs.
IV. SIMULATION RESULTS
Figure 4 illustrates the simulation results for 11 Level proposed HCS inverter. The simulation results for output
voltage and current and its phase difference is shown in figure 4
Fig 4: Waveform for output voltage and current for HCS converter
Sources Conventional Method Proposed Method
DC Sources 2n+1 2n+1
Switches 8n+4 6n+2
Output Levels 12n+3 12n-1
Vmax 6n+1 6n-1
Peak Inverse Voltage 20n+4 26n-4
On-State Switches 4n+2 3n+1
4. Journal of Science and Technology
www.jst.org.in 18 | Page
V. CONCLUSION
In this paper, a new multilevel topology based on multilevel hybrid cascade-stack (HCS) inverter,
which is obtained by the series connected modules. This topology is compared with other topologies and it is
shown that the number of active switches are reduced which reduces the voltage drop. The future work for this
topology is extended to the 23 level and 31-Level symmetric and asymmetric modes which improves the THD
of the output voltage.
REFERENCES
[1] Mahdi Toopchi Khosroshahi, Ali Ajami, Ata Ollah Mokhberdoran, Mohammadreza Jannati OsKuee, Multilevel hybrid cascade-stack
inverter with substantial reduction in switches number and power losses, Turkish Journal of Electrical Engineering & Computer
Sciences, (2015) 23: 987-1000
[2] Nami A, Zare F, Ghosh A, Blaabjerg F. A hybrid cascade converter topology with series-connected symmetrical and asymmetrical
diode-clamped H-bridge cells. IEEE Transactions on Power Electronics 2011; 26: 51-65.
[3 ]Hasegawa K, Akagi H. A new DC-voltage-balancing circuit including a single coupled inductor for a five-level diode-clamped PWM
inverter. IEEE Transactions on Industrial Applications 2011; 47: 841-852.
[4] Meynard T, Foch H. Multi-level conversion: high voltage choppers and voltage-source inverters. In: IEEE 1992 23rd Annual Power
Electronics Specialists Conference; 1992: IEEE. pp. 397-403.
[5] Marchesoni M, Mazzucchelli M, Tenconi S. A non-conventional power converter for plasma stabilization. In: IEEE 1988 19th Annual
Power Electronics Specialists Conference; 1988: IEEE. pp. 122-129.
[6] Marchesoni M, Vaccaro L. Operating limits in multilevel MPC inverters with active front ends. In: International Symposium on Power
Electronics Electrical Drives Automation and Motion; 2010. pp. 192-197.
[7]Yuan X, Stemmler H, Barbi I. Self-balancing of the clamping capacitor-voltages in the multilevel capacitor-clamping inverter under sub-
harmonic PWM modulation. IEEE Transactions on Power Electronics 2001; 16: 256-263.
[8] Malinowski M, Gopakumar K, Marcelo J, P_erez A. A survey on cascaded multilevel inverters. IEEE Transactions on Industrial
Electronics 2010; 57: 2197-2206.
[9] Ebrahimi J, Babaei E, Gharehpetian G. A new topology of cascaded multilevel converters with reduced number of components for high-
voltage applications. IEEE Transactions on Power Electronics 2011; 26: 3109-3118.
[10]Zhong D, Tolbert L, Chiasson J, Ozpineci B. A cascade multilevel inverter using a single DC source. In Applied Power Electronics
Conference and Exposition; 2006; IEEE. pp. 426-430.