This document summarizes a research paper on a high efficiency three phase nine level diode clamped multilevel inverter. The paper proposes a nine level diode clamped multilevel inverter (DCMLI) topology for medium voltage applications. It describes the working of the DCMLI, which uses nine levels of voltage from the DC supply to produce a nine step output voltage waveform with lower total harmonic distortion compared to other lower level inverters. Simulation results show that the nine level inverter produces a line voltage waveform with 7.84% THD, lower than the 10.47% THD of a seven level inverter. The paper concludes that increasing the number of levels in the DCMLI reduces the total harmonic distortion
Multilevel DC Link Inverter with Reduced Switches and BatteriesIJPEDS-IAES
Multilevel inverters are the best solution for medium and high voltage power electronic drives. Because of its unique characteristic of synthesizing sinusoidal voltage with less harmonic contents using several DC sources. In a three phase multilevel inverter, each phase of a cascaded H-bridge inverter requires ‘n’ DC sources to obtain 2n + 1 output voltage levels. One particular disadvantage is that, it increases number of power semiconductor switches. To overcome this disadvantage a multilevel DC link inverter (MLDCLI) with reduced number of switches and batteries is proposed.
Performance Evaluation of Nine Level Modified CHB Multilevel Inverter for Var...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
Comparison of thd reduction for asymmetrical cascaded h bridge invertereSAT 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
IEEE 2012 Projects,academic projects in .net,academic projects in java,b tech mini projects,btech projects,electrical projects for students,electronic engineering final year project,electronic engineering final year projects,electronic final year project,electronics students projects,embedded in chennai,embedded projects chennai,engineering final project,engineering final projects,engineering projects in chennai,engineering projects in java,final year embedded projects,final year engineering projects,final year engineering projects chennai,final year engineering projects in chennai,final year ieee projects chennai,final year it projects,final year project chennai,final year project in chennai,final year project in electronics,final year project of electronics,final year projects for it,final year projects for mca,final year projects in .net,final year projects in chennai,final year projects in electronics,final year projects in embedded systems,final year projects in it,final year projects on embedded systems,final year student project,final year student projects,ieee embedded projects,ieee projects,ieee projects chennai,ieee projects for mca,ieee projects in .net,ieee projects in chennai,ieee projects in java,ieee projects in vlsi,ieee projects on embedded systems,ieee projects titles,ieee students projects,mca academic projects,mca final project,mca final year project,mca final year project in chennai,mca projects,mca projects chennai,mca projects titles,project in vlsi,project of mca,projects for mca,projects in vlsi,student project chennai,student projects in java,vlsi in chennai,year projects,Real Time IEEE Projects,Live Projects,Embedded Live Projects,Power Electronics Projects,Power System Projects,ME Projects,M.Tech Projects,VLSI Final Year projects,Embedded final Year Projects,Real Time Embedded Projects,Real Time Software Projects,Live Java Projects,Dot net Projects in Chennai,.Net Projects,B.tech projects,BE Projects,Real Time Project MBA, Real Time Project BE,Project Work BE,Real Time Project MCA,Real Time Project BE Electronic,Computer Software Training Embedded Systems, Real Time Project,Computer Project Work,Real Time Project IT,Embedded Training,Real Time Project Me,Project Work Ieee Based,Real Time Project B Tech,Project Work MCA,Project Work Computer Science,Project Work M E,Engineering Project Consultants,Real Time Project MSC,Real Time Project M Tech,Real Time Project Bio Medical,Project Consultants For Electronic,Project Work B Tech,Real Time Project BE Electrical,Real Time Project Dot Net,Real Time Project BCA,Project Work M Phil,Real Time Project M Phil,Project Work Embedded System,Real Time Project Embedded System,Project Work M Tech,Project Engineering,Real Time Project Java,Real Time Project PHD,Project Work IT,Real Time Project Networking,Real Time Project BSc,Real Time Project Matlab,Computer Software Training Embedded Network,Project Work Java,Real Time Project Vlsi,Real Time Project Animation,Project Work HTML,Real
Multilevel DC Link Inverter with Reduced Switches and BatteriesIJPEDS-IAES
Multilevel inverters are the best solution for medium and high voltage power electronic drives. Because of its unique characteristic of synthesizing sinusoidal voltage with less harmonic contents using several DC sources. In a three phase multilevel inverter, each phase of a cascaded H-bridge inverter requires ‘n’ DC sources to obtain 2n + 1 output voltage levels. One particular disadvantage is that, it increases number of power semiconductor switches. To overcome this disadvantage a multilevel DC link inverter (MLDCLI) with reduced number of switches and batteries is proposed.
Performance Evaluation of Nine Level Modified CHB Multilevel Inverter for Var...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
Comparison of thd reduction for asymmetrical cascaded h bridge invertereSAT 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
IEEE 2012 Projects,academic projects in .net,academic projects in java,b tech mini projects,btech projects,electrical projects for students,electronic engineering final year project,electronic engineering final year projects,electronic final year project,electronics students projects,embedded in chennai,embedded projects chennai,engineering final project,engineering final projects,engineering projects in chennai,engineering projects in java,final year embedded projects,final year engineering projects,final year engineering projects chennai,final year engineering projects in chennai,final year ieee projects chennai,final year it projects,final year project chennai,final year project in chennai,final year project in electronics,final year project of electronics,final year projects for it,final year projects for mca,final year projects in .net,final year projects in chennai,final year projects in electronics,final year projects in embedded systems,final year projects in it,final year projects on embedded systems,final year student project,final year student projects,ieee embedded projects,ieee projects,ieee projects chennai,ieee projects for mca,ieee projects in .net,ieee projects in chennai,ieee projects in java,ieee projects in vlsi,ieee projects on embedded systems,ieee projects titles,ieee students projects,mca academic projects,mca final project,mca final year project,mca final year project in chennai,mca projects,mca projects chennai,mca projects titles,project in vlsi,project of mca,projects for mca,projects in vlsi,student project chennai,student projects in java,vlsi in chennai,year projects,Real Time IEEE Projects,Live Projects,Embedded Live Projects,Power Electronics Projects,Power System Projects,ME Projects,M.Tech Projects,VLSI Final Year projects,Embedded final Year Projects,Real Time Embedded Projects,Real Time Software Projects,Live Java Projects,Dot net Projects in Chennai,.Net Projects,B.tech projects,BE Projects,Real Time Project MBA, Real Time Project BE,Project Work BE,Real Time Project MCA,Real Time Project BE Electronic,Computer Software Training Embedded Systems, Real Time Project,Computer Project Work,Real Time Project IT,Embedded Training,Real Time Project Me,Project Work Ieee Based,Real Time Project B Tech,Project Work MCA,Project Work Computer Science,Project Work M E,Engineering Project Consultants,Real Time Project MSC,Real Time Project M Tech,Real Time Project Bio Medical,Project Consultants For Electronic,Project Work B Tech,Real Time Project BE Electrical,Real Time Project Dot Net,Real Time Project BCA,Project Work M Phil,Real Time Project M Phil,Project Work Embedded System,Real Time Project Embedded System,Project Work M Tech,Project Engineering,Real Time Project Java,Real Time Project PHD,Project Work IT,Real Time Project Networking,Real Time Project BSc,Real Time Project Matlab,Computer Software Training Embedded Network,Project Work Java,Real Time Project Vlsi,Real Time Project Animation,Project Work HTML,Real
ACADEMIC MATLAB SIMULATION 2013/14/15 PROJECTS FOR
• ELECTRICAL AND ELECTRONICs ENGINEERING[EEE]
• POWER ELECTRONICs AND DRIVES[PED]
• POWER SYSTEMS[PS]….
We Can also Develop Your Own Ideas and Your IEEE Papers With Extension also…
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Hybrid topology of asymmetric cascaded multilevel inverter with renewable ene...Asoka Technologies
This paper presents a binary topology of Multimodule level inverters produce a staircase output voltage from renewable DC voltage sources. The MLI (Multi Level Inverter) Requires many number of semiconductor switches is main drawback of multilevel inverters. The MLI can be classified as two method, one is symmetric and another asymmetric converters. In symmetrical multilevel inverter can apply same voltage level to all cascaded circuit, in asymmetric multilevel inverters can be vary input source voltage at each cascaded H-bridge by using binary algorithm. In this paper, a discrete binary topology for multilevel converters is proposed using cascaded sub-multilevel Cells. This sub-multilevel converter can produce sixty three levels of voltage from five discrete DC source. The Total Harmonic Distortions (THD) is minimized by discrete binary topology. The working operation and performance of the proposed multilevel inverters studies has been verified by simulation of using SIMULINK / MA TLAB results.
Ieee Power Electronics Ieee Project Titles, 2009 2010 Ncct Final Year Projectsncct
Final Year Projects, IEEE Projects, Final Year Projects in Chennai, Final Year IEEE Projects, final year projects, college projects, student projects, java projects, asp.net projects, software projects, software ieee projects, ieee 2009 projects, 2009 ieee projects, embedded projects, final year software projects, final year embedded projects, ieee embedded projects, matlab projects, microcontroller projects, vlsi projects, dsp projects, free projects, project review, project report, project presentation, free source code, free project report, Final Year Projects, IEEE Projects, Final Year Projects in Chennai, Final Year IEEE Projects, final year projects, college projects, student projects, java projects, asp.net projects, software projects, software ieee projects, ieee 2009 projects, 2009 ieee projects, embedded projects, final year software projects, final year embedded projects, ieee embedded projects, matlab projects
Performance and Analysis of Hybrid Multilevel Inverter fed Induction Motor Drivernvsubbarao koppineni
This paper presents the Five level inverter with single DC source which is used to generate a five level output with two bridges and six switches and performance of three phase induction motor is analyzed when connected to PV array For this two identical dc sources of 50V each for two bridges in five levels using Multi level inverter and five level output is obtained by using a single DC source of 100V with six switches. A virtual DC source (charged capacitor acts as virtual DC source) is used for getting the output. The same technique is implemented for three-phase circuit i.e. by using single DC source. An asynchronous motor (three-phase) is connected as load and its performance characteristics are analyzed. And further the DC source is replaced by a renewable resource such as solar panels, fuel cell etc. and DC voltage is obtained. Performance characteristics of three-phase asynchronous motor are analyzed with PV array connected. The method can be easily extended to an m-level inverter.
H bridge multilevel inverter organized krunal gamit
: In this paper mainly focused on the design and implementation of new topology in a single phase five
level cascaded H-bridge multilevel inverter by using only a five switches and two DC power source. The main
objective of this paper is to increase number of levels with a low number of switches and sources at the output
without adding any complexity to the power circuit. The main merit of the new topology is to reduce the lower
total harmonic distortion, lower electromagnetic interference generation and high output voltage. In this paper,
various carrier pulse width modulation techniques are proposed, which can minimize the total harmonic
distortion and enhances the output voltages from proposed work of five level inverter. The various switching
topologies of single-phase five level cascaded H-bridge multilevel inverters have been analyzed in this paper. It
is justified that the new topology can be recommended to single phase five level Cascaded H-bridge inverter for
better performance in comparison with conventional method. The simulation is done by Mat Lab 8.0 version
software.
Harmonic Minimization In Multilevel Inverters By Using PSOIDES Editor
Harmonic Elimination in a multilevel inverters is
an optimization problem which is solved by applying particle
swarm optimization (PSO) technique. The derived equation
for the computation of total harmonic distortion (THD) of the
output voltage of the multilevel inverter is used as the objective
function in PSO algorithm. The objective function used is to
reduce the THD of the multilevel inverter and obtain the
corresponding switching angles with the elimination of
possible lower order harmonics. In this paper a pseudo code
based algorithm is proposed to deal with inequality constraints
which will helps in accelerating the optimization process. The
proposed method is applied for seven level cascade inverter to
eliminate the 5th and 7th order harmonics to reduce the total
harmonic distortion .This proposed PSO algorithm is effective
in reducing the total harmonic distortion corresponding the
range of modulation index. The simulation results shows that
the proposed PSO method is indeed capable of obtaining
higher quality of solutions to eliminate 5th and 7th order
harmonics and to reduce the total harmonic distortion of 7-
level cascade inverter
This project aims at using (PD-MCPWM) Phase
disposition multi carrier pulse width modulation technique to
reduce leakage current in a transformerless cascaded multilevel
inverter for PV systems. Advantages of transformerless PV
inverter topology is as follows, simple structure, low weight and
provides higher efficiency , but however this topology provides a
path for the leakage current to flow through the parasitic
capacitance formed between the PV module and the ground.
Modulation technique reduces leakage current with an added
advantage without adding any extra components.
Multilevel inverter fed induction motor driveseSAT Journals
Abstract Induction motor drive is used in almost all industries including oil and gas sectors, production plants and process industries. Speed control of induction motor is a major concern. The proposed technology implements a better speed control for induction motor drives using a multilevel inverter. The switching sequences are generated by optimized pre-calculated angles for controlling induction motor. And also with the use of a multi-level inverter there is lower distortion of output voltages and Total Harmonic Distortion (THD) of machine currents under steady state operating conditions can be minimized. THD can be further reduced by optimizing the switching angles. This technology can be extended to higher levels of output voltages by using an n state multilevel inverter. In this paper, a seven level multilevel inverter is proposed, its simulation is done in MATLAB/Simulink and the results were verified by experimenting on a hardware prototype. This could be extended to higher levels of voltage waveform and can be used in photovoltaics. A multilevel inverter could be a better choice as a dc-dc converter in solar power circuits. Keywords: Multilevel inverter, optimal pulse with modulation, total harmonic d1istortion.
ACADEMIC MATLAB SIMULATION 2013/14/15 PROJECTS FOR
• ELECTRICAL AND ELECTRONICs ENGINEERING[EEE]
• POWER ELECTRONICs AND DRIVES[PED]
• POWER SYSTEMS[PS]….
We Can also Develop Your Own Ideas and Your IEEE Papers With Extension also…
We also write papers for your projects and give guidance for paper publishing.
For Further Details Call Us @
0-9347143789/9949240245
Visit us at: www.asokatechnologies.in
For Abstracts of IEEE papers and For Any Queries
Mail us : asokatechnologies@gmail.com
Hybrid topology of asymmetric cascaded multilevel inverter with renewable ene...Asoka Technologies
This paper presents a binary topology of Multimodule level inverters produce a staircase output voltage from renewable DC voltage sources. The MLI (Multi Level Inverter) Requires many number of semiconductor switches is main drawback of multilevel inverters. The MLI can be classified as two method, one is symmetric and another asymmetric converters. In symmetrical multilevel inverter can apply same voltage level to all cascaded circuit, in asymmetric multilevel inverters can be vary input source voltage at each cascaded H-bridge by using binary algorithm. In this paper, a discrete binary topology for multilevel converters is proposed using cascaded sub-multilevel Cells. This sub-multilevel converter can produce sixty three levels of voltage from five discrete DC source. The Total Harmonic Distortions (THD) is minimized by discrete binary topology. The working operation and performance of the proposed multilevel inverters studies has been verified by simulation of using SIMULINK / MA TLAB results.
Ieee Power Electronics Ieee Project Titles, 2009 2010 Ncct Final Year Projectsncct
Final Year Projects, IEEE Projects, Final Year Projects in Chennai, Final Year IEEE Projects, final year projects, college projects, student projects, java projects, asp.net projects, software projects, software ieee projects, ieee 2009 projects, 2009 ieee projects, embedded projects, final year software projects, final year embedded projects, ieee embedded projects, matlab projects, microcontroller projects, vlsi projects, dsp projects, free projects, project review, project report, project presentation, free source code, free project report, Final Year Projects, IEEE Projects, Final Year Projects in Chennai, Final Year IEEE Projects, final year projects, college projects, student projects, java projects, asp.net projects, software projects, software ieee projects, ieee 2009 projects, 2009 ieee projects, embedded projects, final year software projects, final year embedded projects, ieee embedded projects, matlab projects
Performance and Analysis of Hybrid Multilevel Inverter fed Induction Motor Drivernvsubbarao koppineni
This paper presents the Five level inverter with single DC source which is used to generate a five level output with two bridges and six switches and performance of three phase induction motor is analyzed when connected to PV array For this two identical dc sources of 50V each for two bridges in five levels using Multi level inverter and five level output is obtained by using a single DC source of 100V with six switches. A virtual DC source (charged capacitor acts as virtual DC source) is used for getting the output. The same technique is implemented for three-phase circuit i.e. by using single DC source. An asynchronous motor (three-phase) is connected as load and its performance characteristics are analyzed. And further the DC source is replaced by a renewable resource such as solar panels, fuel cell etc. and DC voltage is obtained. Performance characteristics of three-phase asynchronous motor are analyzed with PV array connected. The method can be easily extended to an m-level inverter.
H bridge multilevel inverter organized krunal gamit
: In this paper mainly focused on the design and implementation of new topology in a single phase five
level cascaded H-bridge multilevel inverter by using only a five switches and two DC power source. The main
objective of this paper is to increase number of levels with a low number of switches and sources at the output
without adding any complexity to the power circuit. The main merit of the new topology is to reduce the lower
total harmonic distortion, lower electromagnetic interference generation and high output voltage. In this paper,
various carrier pulse width modulation techniques are proposed, which can minimize the total harmonic
distortion and enhances the output voltages from proposed work of five level inverter. The various switching
topologies of single-phase five level cascaded H-bridge multilevel inverters have been analyzed in this paper. It
is justified that the new topology can be recommended to single phase five level Cascaded H-bridge inverter for
better performance in comparison with conventional method. The simulation is done by Mat Lab 8.0 version
software.
Harmonic Minimization In Multilevel Inverters By Using PSOIDES Editor
Harmonic Elimination in a multilevel inverters is
an optimization problem which is solved by applying particle
swarm optimization (PSO) technique. The derived equation
for the computation of total harmonic distortion (THD) of the
output voltage of the multilevel inverter is used as the objective
function in PSO algorithm. The objective function used is to
reduce the THD of the multilevel inverter and obtain the
corresponding switching angles with the elimination of
possible lower order harmonics. In this paper a pseudo code
based algorithm is proposed to deal with inequality constraints
which will helps in accelerating the optimization process. The
proposed method is applied for seven level cascade inverter to
eliminate the 5th and 7th order harmonics to reduce the total
harmonic distortion .This proposed PSO algorithm is effective
in reducing the total harmonic distortion corresponding the
range of modulation index. The simulation results shows that
the proposed PSO method is indeed capable of obtaining
higher quality of solutions to eliminate 5th and 7th order
harmonics and to reduce the total harmonic distortion of 7-
level cascade inverter
This project aims at using (PD-MCPWM) Phase
disposition multi carrier pulse width modulation technique to
reduce leakage current in a transformerless cascaded multilevel
inverter for PV systems. Advantages of transformerless PV
inverter topology is as follows, simple structure, low weight and
provides higher efficiency , but however this topology provides a
path for the leakage current to flow through the parasitic
capacitance formed between the PV module and the ground.
Modulation technique reduces leakage current with an added
advantage without adding any extra components.
Multilevel inverter fed induction motor driveseSAT Journals
Abstract Induction motor drive is used in almost all industries including oil and gas sectors, production plants and process industries. Speed control of induction motor is a major concern. The proposed technology implements a better speed control for induction motor drives using a multilevel inverter. The switching sequences are generated by optimized pre-calculated angles for controlling induction motor. And also with the use of a multi-level inverter there is lower distortion of output voltages and Total Harmonic Distortion (THD) of machine currents under steady state operating conditions can be minimized. THD can be further reduced by optimizing the switching angles. This technology can be extended to higher levels of output voltages by using an n state multilevel inverter. In this paper, a seven level multilevel inverter is proposed, its simulation is done in MATLAB/Simulink and the results were verified by experimenting on a hardware prototype. This could be extended to higher levels of voltage waveform and can be used in photovoltaics. A multilevel inverter could be a better choice as a dc-dc converter in solar power circuits. Keywords: Multilevel inverter, optimal pulse with modulation, total harmonic d1istortion.
A Novel Integrated AC-DC Five Level Converter Strategy for Power Factor Corre...IJMTST Journal
Multilevel configuration has the advantage of its simplicity and modularity over the configurations of the other converters. With the application of multilevel converter in the high voltage and large power occasions in recent years, its modulation strategy has become a research hot point in the field of power electronics. The proposed power-factor-correction circuit can achieve unity power factor and ripple-free input current using a coupled inductor. The proposed rectifier can also produce input currents that do not have dead band regions and an output current that is continuous for all load conditions. The features of this converter are that it has lower input section peak current stresses and a better harmonic content than similar converter with a non-interleaved output, the output current is continuous for all load ranges, and the dc bus voltage is less than 450 for all line and load conditions. In this paper, the operation of the new converter is explained, its steady-state characteristics are determined by analysis, and these characteristics are used to develop a procedure for the design of the converter. Hence the simulation results are obtained using MATLAB/SIMULINK software. The proposed system provides a closed loop control for variable output voltage. The SSPFC AC/DC converter can operate with lower peak voltage stresses across the switches and the DC bus capacitors as it is a three-level converter. The proposed concept can be implemented with 5-level for efficient output voltage.
DG FED MULTILEVEL INVERTER BASED D-STATCOM FOR VARIOUS LOADING CONDITIONSIJCI JOURNAL
During the past few decades, power industries have proved that the adverse impacts on the PQ can be
mitigated or avoided by conventional means, and that technique using fast controlled force commutated
power electronics (PE) are even more effective. PQ compensators can be categorized into two main types.
One is shunt connected compensation device that effectively eliminates harmonics. The other is the series
connected device, which has an edge over the shunt type for correcting the distorted system side voltages
and voltage sags caused by power transmission system faults. The STATCOM used in distribution systems
is called DSTACOM (Distribution-STACOM) and its configuration is the same, but with small
modifications. Recent advances in the power-handling capabilities of static switch devices such as 3.3kV,
4.5kV, and 6.5kV Insulated Gate Bipolar Transistors (IGBTs) with voltage rating commercially available,
have made the use of the voltage source inverters (VSI) feasible for high-power applications. High power
and high-voltage conversion systems have become very important issues for the power electronic industry
handling the large ac drive and electrical power applications at both the transmission and distribution
levels. For these reasons, new families of multilevel inverters have emerged as the solution for working
with higher voltage levels. Multilevel inverters (MLI) include an array of power semiconductors and
capacitor voltage sources, the output of which generate voltages with stepped waveforms. These converter
topologies can generate high-quality voltage waveforms with power semiconductor switches operating at a
frequency near the fundamental. It significantly reduces the harmonics problem with reduced voltage stress
across the switch. This research work is mainly focusing on application of multilevel DSTATCOM for
power quality improvement in distribution system with integration of RES. Matlab/Simulink based model is
developed and simulation results are presented.
A Power quality problem is an occurrence of nonstandard voltage, current or frequency that results in a
failure or a misoperation of end user equipments. Utility distribution networks, sensitive industrial loads and
critical commercial operations suffer from various types of outages and service interruptions which can cost
significant financial losses. With the increase in load demand, the Renewable Energy Sources (RES) are
increasingly connected in the distribution systems which utilizes power electronic Converters/Inverters. This
paper presents a single-stage, three-phase grid connected solar photovoltaic (SPV) system. The proposed system
is dual purpose, as it not only feeds extracted solar energy into the grid but it also helps in improving power
quality in the distribution system. The presented system serves the purpose of maximum power point tracking
(MPPT), feeding SPV energy to the grid, harmonics mitigation of loads connected at point of common coupling
(PCC) and balancing the grid currents. The SPV system uses a three-phase voltage source converter (VSC) for
performing all these functions. An improved linear sinusoidal tracer (ILST)-based control algorithm is proposed
for control of VSC. In the proposed system, a variable dc link voltage is used for MPPT. An instantaneous
compensation technique is used incorporating changes in PV power for fast dynamic response. The SPV system
is first simulated in MATLAB along with Simulink and simpower system toolboxes.
Fuzzy based control of Transformer less Coupled inductor based DC-DC converterIJERA Editor
Most of the industrial applications use any one of the basic DC-DC converter configurations namely buck,
boost, buck–boost, and Cuk converters. These converters are non-isolating converters. Buck-boost converters
use inductors for storing energy from the source and release the same to load or output. This results in high
stress across magnetic components. This drawback restricts usage of buck-boost converters to low power
applications. Flyback converters popularly have known as buck-boost converters uses transformers for
achieving wide range of step down and step up voltages. Coupled inductor based converters or tapped inductor
based converters are used for achieving wide input – wide output conversion ratios. Coherent transition between
step-down and step-up modes is achieved by a proper control scheme. This paper proposes fuzzy logic based
closed loop control scheme for control of converter switches. Theoretical derivations of control parameters with
their membership values, mamdani based rules for development of fuzzy rules and simulation results of a
coupled inductor based DC-DC converter using MATLAB / SIMULINK are concluded.
Five control algorithms are presented in this paper for STATCOM that meets the requirement of load reactive power and correspondingly voltage balancing of isolated dc capacitors for H-bridges. The control techniques used for an inverter in this paper are Sinusoidal Phase Shifted Carrier (SPSC) PWM, Sinusoidal Phase Disposition (SPD) PWM Third Harmonic Injected Phase Shifted Carrier (THIPSC) PWM, Space Vector Phase Shifted Carrier (SVPSC) PWM, and Space Vector Phase Disposition (SVPD) PWM techniques. The STATCOM performance for the different load changes is simulated in MATLAB environment. The performance parameters such as balancing the DC link voltage, THD for the STATCOM output currents, voltages, and reactive components supplied by the STATCOM to the load are compared for all the control strategies.
Analysis of Fuel Cell Based Multilevel DC-DC Boost Converter for Induction MotorIJMTST Journal
In this paper new topologies and interleaving modulation concepts for multilevel DC-DC boost converter
enabling a significantly less loss and a reduced chip size of the power semiconductors are proposed. The
distributed generation (DG) systems based on the renewable energy sources have rapidly developed in
recent years. These DG systems are powered by micro sources such as fuel cells, photovoltaic (PV) systems,
and batteries. Fuel cells are considered to be one of the most promising sources of distributed energy because
of their high efficiency, low environmental impact and scalability. Non-isolated high step-up DC-DC
converters are required in the industrial applications. Many of these conventional DC–DC converters have the
disadvantages of operating at high duty-cycle, high switch voltage stress and high diode peak current. A
three-level step up converter is implemented to boost the fuel cell stack voltage of 96V to 340V. The proposed
converter consists a system of fuel cell based Multilevel DC-DC converter with PI controller is modeled and
simulated by using Matlab/Simulink.
Proposed PV Transformer-Less Inverter Topology Technique for Leakage Current ...IJPEDS-IAES
Importance and demand of using renewable energy is dramatically escalated globally. Hence, the use of renewable energy is going to touch in peak. This demand is varying according to the site choosing. For instance, Wind is preferable where air is following highly as well as solar recommended place is high sun ray reducing places. Especially, the renewable system is highly recommended for electrification issues where it’s possible to produce the electricity for fulfilling rural and remote areas electricity problem. The photovoltaic (PV) panel of connecting with transformer based system is popular where some limitations are occurred especially cost and weight. In contrast, in this paper is focusing these issues where the transformer-less inverter system is used. Here will discuss some transformer-based and transformer-less inverter topologies and the leakage current issue which is occurred when transformer-less inverter system is used. Moreover, here is proposed a topology for reducing the leakage current after doing switching technique in both 50% and 75% duty cycle where output voltage remains quite same.
Power Quality Improvement Using Cascaded H-Bridge Multilevel Inverter Based D...IJERA Editor
Cascaded multilevel configuration of the inverter has the advantage of its simplicity and modularity over the
configurations of the diode-clamped and flying capacitor multilevel inverters. This paper presents a threephase,
five-level and seven level cascaded multilevel voltage source inverter based active filter for power line
conditioning to improve power quality in the distribution network. The DSTATCOM helps to improve the
power factor and eliminate the Total Harmonics Distortion (THD) drawn from a Non-Liner Diode Rectifier
Load (NLDRL). The compensation process is based on concept of p-q theory. A CHB Inverter is considered for
shunt compensation of a 11 kV distribution system. Finally a level shifted PWM (LSPWM) and phase shifted
PWM (PSPWM) techniques are adopted to investigate the performance of CHB Inverter. The results are
obtained through Matlab/Simulink software package.
Similar to High efficiency three phase nine level diode clamped multilevel inverter (20)
"Heart failure is a typical clinical accompanied by symptoms syndrome (e.g. shortness of breath, ankle swelling and fatigue) that lead to structural or functional abnormalities of the heart (e.g. high venous pressure, pulmonary edema and peripheral edema).
In recent years, the significant role of B-type natriuretic peptide has been revealed in the pathogenesis of heart disease and the use of the drug sacubitril/valsartan has started. It has a positive effect on the regulation of the level of B-type natriuretic peptide in the body. It is obviously seen from the the world literature that natriuretic peptides play an important role in the pathophysiology of heart failure. For this reason, many studies suggest that the importance of natriuretic peptides in the diagnosis and treatment of heart failure is recommended.
Due to this, we tried to investigate the effects of a comprehensive medication therapy with a combination of sacubitril/valsartan in the patients with chronic heart failure."
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Cosmetic shop management system project report.pdfKamal Acharya
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High efficiency three phase nine level diode clamped multilevel inverter
1. International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064
Volume 1 Issue 3, December 2012
www.ijsr.net
High Efficiency Three Phase Nine Level Diode
Clamped Multilevel Inverter
S. Kiruthika1
, S. Sudarsan2
, M. Murugesan3
, B. Jayamanikandan4
1
Assistant Professor, Maharaja Engineering College, Erode, India
sivakiruthi@gmail.com
2, 3
Assistant Professor, V.S.B Engineering College, Karur, India
2
sudha2peak@gmail.com , 3
murugesan.kec@gmail.com
4
Excel College of Engineering & Technology, Erode, India
naresh03@gmail.com
Abstract: Nowadays the demand for DC-DC converters and related semiconductor components is an emerging expectation to meet the
pursuit of energy efficiency and to reduce the power demand. Hence the Multiphase DC–DC converters based topology applied for high-
voltage and high-power applications are proposed in this paper. The proposed converter is configured such that the boost - half-bridge
(BHB) cells and voltage doublers are connected in parallel and in series to increase the output voltage and the output power. In
addition, the proposed converter has the advantages of high-step-up voltage gain with significantly reduced transformer turn ratio, low
input current ripple due to interleaving effect, zero-voltage switching turn-on of switches and zero-current switching turn-off of diodes,
no additional clamping and start-up circuits required, high component availability and easy thermal distribution due to the use of
multiple small components and flexibility in device selection results in better design. The inverter is capable of producing seven levels of
output-voltage levels from the dc supply voltage. Multilevel inverters offer improved output waveforms and lower THD. A PWM
switching scheme for the multilevel inverter is generally preferred. By controlling the modulation index, the desired number of levels of
the inverter’s output voltage can be achieved. The device current rating of the proposed multiphase converter is reduced by increasing
the number of parallel connection, and the device voltage rating is reduced by increasing the number of series connection.
Keywords: Diode Clamped Multilevel Inverter (DCMLI), DC-DC converter, pulse width modulation, zero current switching.
1. Introduction
Application of multilevel voltage source converter (VSC)
is becoming popular in power and energy systems as results
of its high power density, excellent performance and high
reliability. Some of the conventional and emerging
applications of VSC include flexible AC transmission system
(FACTS), custom power devices and distributed energy
system (e.g. Photovoltaic, Wind, Micro turbine) in
transmission and distribution systems, respectively .The
application of VSC in custom power devices and distributed
energy system are the recent developments that going to
change the entire distribution system in many ways. Custom
power devices are introduced in the distribution system to
deal with various power quality problems faced by industrial
and commercial customers due to increase in sensitive loads
such as computer and adjustable speed drives and use of
programmable logic control in the industrial process [1]-[3].
These power quality problems could range from simple
flicker to long duration power interruptions. When the
problems occur the associated costs, including downtime,
defects, and loss of production, can be substantial. Among
various power quality problems, voltage sags are more
serious as they can cause customer equipment to malfunction
or a production shutdown. Voltage sags may be caused by
remote faults, or change in loading conditions, such as motor
starting and energizing capacitor or transformer .The voltage
sags could Application of multilevel voltage source
converter (VSC) is becoming popular in power and energy
systems as results of its high power density, excellent
performance and high reliability. Some of the conventional
and emerging applications of VSC include flexible AC
transmission system (FACTS), custom power devices and
distributed energy system (e.g. Photovoltaic, Wind, Micro
turbine) in transmission and distribution systems,
respectively .The application of VSC in custom power
devices and distributed energy system are the recent
developments that going to change the entire distribution
system in many ways. Custom power devices are introduced
in the distribution system to deal with various power quality
problems faced by industrial and commercial customers due
to increase in sensitive loads such as computer and
adjustable speed drives and use of programmable logic
control in the industrial process. These power quality
problems could range from simple flicker to long duration
power interruptions. When the problem occurs, the
associated costs, including downtime, defects, and loss of
production, can be substantial. Among various power quality
problems, voltage sags are more serious as they can cause
customer equipment to malfunction or a production
shutdown. Voltage sags may be caused by remote faults, or
change in loading conditions, such as motor starting and
energizing capacitor or transformer .The voltage sags could
last as little as a few cycles, still can affect several sensitive
loads such as adjustable speed drives and programmable
logic controllers [4]-[7].
As the durations of voltage sag are so short, conventional
voltage control methods such as tap changing transformers
or capacitors with controls are not effective. Fast, more
flexible voltage control methods are needed and power
electronic system based power semiconductor devices can be
used. An effective way of controlling the sags is to inject
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2. International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064
Volume 1 Issue 3, December 2012
www.ijsr.net
power into the system using custom power devices. Ideally,
the systematic power needed for voltage control could be
synthesized using a voltage-sourced inverter with small
reactive component. An inverter-based compensator could
have higher performance, small size, lower cost, and lower
harmonic than conventional topologies .However, the use of
VSC in utility application has been limited because of the
limited power rating of self commutated switches when used
in two-level voltage source inverter. The multilevel VSC is
proposed in recent years as they can avoid the power barrier
by using a modular approach in which switching devices are
stacked together, in almost an unlimited fashion. The number
of inverter “voltage level” is proportional to the number of
dc bus capacitor tap points .As more voltage levels are added
to the inverter, the harmonic performance improves without
increased switching losses. Hence, in this paper a multilevel
VSC, namely diode clamped voltage source converter, is
proposed for high voltage distribution system applications.
2. Multilevel VSC Topology
During the last 10 years, there has been steady growth
multilevel converter topology as they can suit for the high
voltage and high power applications. Multilevel VSC are the
attractive technology for the medium voltage application,
which includes power quality and power conditioning
applications in the distribution system. The most well-known
multilevel topologies developed so far are shown in Figure
1. These are diode clamped multilevel voltage source
converter (DC-VSC). These multilevel topologies can
generate multilevel output voltages with low harmonics.
Figure 1: Multilevel VSC Topology
3. Diode-clamped multilevel inverter
An m-level diode-clamp inverter typically consists of m - 1
capacitors on the dc bus and produces m levels of the Phase
voltage. A one leg of three-phase nine-level diode-clamped
inverter is shown in Figure 3. Each of the three phases of the
inverter shares a common dc bus, which has been subdivided
by eight capacitors into nine levels. The voltage across each
capacitor is, and the voltage stress across each switching
device is limited to the safe working level through the
clamping diodes. Figure 2 shows one of the three line-line
output voltage waveforms for a nine-level multilevel
inverter. The line voltage Vab consists of a phase-leg a
voltage and a phase-leg b voltage. The resulting line voltage
is a 9-level staircase waveform. This means that an m-level
diode-clamped inverter has an m-level output phase voltage
and a (2m-1)-level output line voltage.
Although each active switching device is required to block
only a voltage level of dc V, the clamping diodes require
different ratings for reverse voltage blocking.. If the inverter
is designed such that each blocking diode has the same
voltage rating as the active switches, Dn will require n diodes
in series; consequently, the number of diodes required for
each phase would be 2(m-2). Thus, the number of blocking
diodes is quadratically related to the number of levels in a
diode-clamped inverter. DCMLI has the following
advantages and disadvantages.
3.1 Merits
DC-link capacitors are common to three phases.
Switching frequency can be low.
Reactive current and negative-phase sequence
current can be controlled.
3.2 Demerits
Many diodes are used for clamping.
Many diodes make physical layout difficult e.g.
increase stray inductance
Figure 2: Output line Voltage of 9 levels DCMLI
4. PWM method for 9-level DCMLI
Pulse width modulation (PWM) strategies used in a
conventional inverter can be modified to use in multilevel
inverters. Previous authors (McGrath, B.P. and D.G.
Holmes) have extended several different two-level multilevel
carrier-based PWM techniques as a means for controlling the
active devices in a multilevel inverter. The most popular and
easiest technique to implement uses several triangle carrier
signals and one reference, or modulation, signal per phase
[8]-[10]. Figure 4 shows the principle of the PWM method
for a multilevel inverter. The PWM method generates
switching signals by comparing one sinusoidal signal and
eight triangular wave signals, which have DC bias for each
voltage level, as shown in Figure 4. In this modulation
method, the duty cycle of each voltage level is determined by
the ratio of the 4 sine wave amplitude to the triangular
carrier signal amplitude. That is, the sine wave amplitude
determines modulation factor, and one modulation factor
generates only one pattern of output pulse width. Using
PWM modulation explained above, simulations have been
conducted to verify the effectiveness of the algorithm. PWM
modulation in MATLAB Simulink block diagrams and the
nine-level DCMLI is shown in Figure.3
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3. International Journal of Science and Research (IJSR), India Online ISSN: 2319-7064
Volume 1 Issue 3, December 2012
www.ijsr.net
Figure 3: Three-phase nine-level diode-clamped inverter
Figure 4: Nine-Level inverter Model
4. Simulation results
The gate signals of DCMLI power circuits are produced by
triangle and sinusoidal comparison in MATLAB/Simulink
blocks. The output of nine-level DCMLI is connected to a
load and the voltage waveforms are shown in Figure 5. In
order to get THD level of the waveform, a fast Fourier
transform (FFT) is applied to obtain the spectrum of the
output voltage, which is shown in Figures 5. The THD of the
output voltage of nine-level DCMLI is 7.84% shown in
Figure.7, which shows that lower order harmonics, have
been eliminated. THD levels of seven levels DCMLI and
nine levels DCMLI are compared in Table 1. From the table,
it is clear that the THD value of nine levels DCMLI is lower
than that seven level DCMLI.
Table 1: THD of seven and nine level DCMLI
Figure 5: Sinusoidal PWM
Figure 6: Simulation Nine Level Ouput Line Voltage
Waveform
Figure 7: FFT Analysis of Nine Level Inverter
5. Conclusion
This paper presents a multilevel voltage source converter. As
the ratings of various power electronic switches are limited,
multilevel voltage source converter topologies are useful for
high voltage and high power applications along with low
harmonics. Diode-Clamped multilevel voltage source
converter is selected for DVR application as the number of
capacitors needed and switching states are less compared to
other topologies. The nine-level diode-clamped multilevel
inverters for harmonic elimination in MATLAB/ Simulink
software package have been presented. The THD levels of
DCMLI Seven Level Nine Level
THD 10.47% 7.84%
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www.ijsr.net
seven levels DCMLI and nine levels DCMLI are compared.
Simulation results reveal that the THD of nine levels
DCMLI is less than the seven levels DCMLI. Therefore it is
concluded that the THD will be decreased by increasing the
level of DCMLI.
References
[1] Peng, F. Z. and Lai, J. S., Lai, J. S., McKeever, J. W.
and Van Coevering, J. A., “Multilevel voltage source
inverter with separate DC sources for static var
generation”, IEEE Trans. Ind. Appl., Vol. 32, No. 5, pp.
1130–1138, Sept./Oct., 1996.
[2] DellAquila, A., Liserre, V. M. M. and Cecati, C.,
“Design of H-bridge multilevel active rectifier for
traction systems,” in Proc. IEEE-IAS, pp. 1020–1027,
2002.
[3] Tolbert, L. M. and Peng, F. Z., “Multilevel converters
for large electric drives”, IEEE Trans. Ind. Appl., Vol.
35, No. 1, pp. 36-34, Jan./Feb., 1999.
[4] Tolbert, L. M., Peng, F. Z. and Habetler, T. G.,
“Multilevel inverters for electric vehicle applications”,
in Proc. Power Elect. Trans., pp. 79–84, 1998.
[5] Rodriguez, J., Lai, J. S. and Peng, F. Z., “Multilevel
inverters: a survey of topologies, controls and
applications”, IEEE Trans. Ind. Electron., Vol. 49, No.
4, pp.724-738, Aug, 2002.
[6] S. Khomfoi and L. M. Tolbert, “Power Electronics
Handbook, Multilevel Power Converters” - Chapter 17,
2nd Edition Elsevier, 2007, ISBN 978-0-12-088479-7,
pp. 451-482, 2007.
[7] K. Fujii, U. Schwarzer, “Comparison of Hard- Switched
Multi-Level Inverter Topologies for STATCOM by
Loss- Implemented Simulation and Cost Estimation”,
Power Electronics Specialists Conference, PESC '05.
pp.340 – 346, 2005.
[8] McGrath, B.P. and D.G. Holmes, “Multicarrier PWM
Strategies for Multilevel Inverters”, IEEE Transaction
on Industrial Electronics, Volume 49, Issue 4, pp.858-
86, 2002.
[9] Wang, J, Wei, R., Ge, Q., Li, Y., “The Harmonic
Elimination of Multilevel Converters” IEEE Conference
on Electrical Machines and Systems, Vol.1, pp. 419-
422, 2003
[10]S. Kjaer, J. Pedersen, and F. Blaabjerg, “A review of
single-phase grid connected inverters for photovoltaic
modules,” IEEE Trans. Ind. Appl., vol. 41, no. 5, pp.
1292–1306, 2005.
Author Profile
S.Sudarsan was born in karur on
November 21, 1985. He is graduated in
2009 from Anna University chennai. He
also received M.E degree in Power
Electronics and drives during 2012 from
Anna University, Chennai. He is currently
working as an Assistant professor at
V.S.B Engineering College, Karur. His
area of interest involves in Power Electronics, BLDC Drives,
inverter, Renewable energy power generation. He is an ISTE
life member. He has published more than 4 papers.
S.Kiruthika was born in Tamilnadu, India, on May 18,
1988. She received B.E degree from Anna University
chennai, in 2009. She also received M.E degree in Power
Electronics and drives during 2012 from Anna University,
Chennai. She is currently working as Assistant professor at
Maharaja Engineering College, Erode. Her research interest
involves in power electronics, inverter and modeling of wind
turbine.
M.Murugesan was born in Anthiyur on
December 27, 1986. He is graduated in
2009 from Anna University, Chennai. He
is post graduated M.E Power Electronics
and Drives during 2011 from Anna
University. He is currently working as
Assistant professor at V.S.B Engineering
College, Karur. His area of interest
involves in Power Electronics, inverter, modeling of
induction Motor. He is an ISTE life member. He has
published more than 15 papers.
B.Jayamanikandan was born in Erode
on April 3, 1986. He is graduated in 2007
from Sri Ramakrishna Institute of
Technology, Coimbatore and post
graduated in 2012 at Anna University of
technology, Coimbatore. He is currently
working as Assistant professor in the
department of EEE at Excel College of
Engineering and Technology, komarapalayam from June
2012. His research interest involves in power electronics,
Renewable energy power generation.
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