Nowadays power electronics circuits are embedded to most of electrical application areas. This approached offers a great control mechanism with simple and easy circuit configuration. Switched Reluctance Motor (SRM) is one of the most recent apparatus which draws a great number of researchers’ interests. Previously several attempts are made to use the power converters as driver for SRM such as Voltage Source Inverter (VSI) and bridge converters. This paper presents an analysis study of three level inverter to control the SRM. The inverter is controlled using space vector modulation SVM. The aim of this paper is to report the use the multilevel inverter to be fed into the SRM. The implementation of the multilevel inverter is abl to reduce the Total Harmonics Distortion (THD). Performance comparison are made between the multilevel and previous power electronics circuits that applied to the SRM. The simulation results have been conducted by MATLAB/SIMULINK software.
One of the preferred choices of electronic power conversion for high power applications are multilevel inverters topologies finding increased attention in industry. Cascaded H-Bridge multilevel inverter is one of these topologies reaching the higher output voltage, power level and higher reliability due to its modular topology. Level Shifted Carrier Pulse Width Modulation (LSCPWM) and Phase Shifted Carrier Pulse Width Modulation are used generally for switching cascaded H-bridge (CHB) multilevel inverters. This paper compares LSCPWM and PSCPWM in terms of total harmonics distortion (THD) and output voltage among inverter cells. Simulation for 21-level CHB inverter is carried out in MATLAB/SIMULINK and simulation results are presented.
Power system Projects, Power electronics projects, Control system projects,
MSR PROJECTS ( Now as a MSR EDUSOFT PVT LTD),
#503,Annapurna Block, beside mytrivanam, Adhithya Enclave, Ameerpet, HYD-38.
E-mail: msrprojectshyd@gmail.com,
Web: www.msrprojectshyd.com , facebook.com/msrprojects ,
Ring on: 040 66334142, +91 9581464142.
Branches: Hyderabad ( Ameerpet | Dilsuknagar) | Kurnool
Nowadays power electronics circuits are embedded to most of electrical application areas. This approached offers a great control mechanism with simple and easy circuit configuration. Switched Reluctance Motor (SRM) is one of the most recent apparatus which draws a great number of researchers’ interests. Previously several attempts are made to use the power converters as driver for SRM such as Voltage Source Inverter (VSI) and bridge converters. This paper presents an analysis study of three level inverter to control the SRM. The inverter is controlled using space vector modulation SVM. The aim of this paper is to report the use the multilevel inverter to be fed into the SRM. The implementation of the multilevel inverter is abl to reduce the Total Harmonics Distortion (THD). Performance comparison are made between the multilevel and previous power electronics circuits that applied to the SRM. The simulation results have been conducted by MATLAB/SIMULINK software.
One of the preferred choices of electronic power conversion for high power applications are multilevel inverters topologies finding increased attention in industry. Cascaded H-Bridge multilevel inverter is one of these topologies reaching the higher output voltage, power level and higher reliability due to its modular topology. Level Shifted Carrier Pulse Width Modulation (LSCPWM) and Phase Shifted Carrier Pulse Width Modulation are used generally for switching cascaded H-bridge (CHB) multilevel inverters. This paper compares LSCPWM and PSCPWM in terms of total harmonics distortion (THD) and output voltage among inverter cells. Simulation for 21-level CHB inverter is carried out in MATLAB/SIMULINK and simulation results are presented.
Power system Projects, Power electronics projects, Control system projects,
MSR PROJECTS ( Now as a MSR EDUSOFT PVT LTD),
#503,Annapurna Block, beside mytrivanam, Adhithya Enclave, Ameerpet, HYD-38.
E-mail: msrprojectshyd@gmail.com,
Web: www.msrprojectshyd.com , facebook.com/msrprojects ,
Ring on: 040 66334142, +91 9581464142.
Branches: Hyderabad ( Ameerpet | Dilsuknagar) | Kurnool
Single Phase Matrix Converter for Input Power Factor Improvementiosrjce
IOSR Journal of Electrical and Electronics Engineering(IOSR-JEEE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of electrical and electronics engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in electrical and electronics engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Application of single phase matrix converter topology to an uninterruptible 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
Analysis and Simulation of Solar PV Connected with Grid Accomplished with Boo...YogeshIJTSRD
This paper deals with a solar PV array connected with grid system. This system consists of PV cells with 30 KW system, Boost converter, three phase inverter with suitable control system and three phase load. This paper gives analysis of each components of the system. The output voltage from the solar PV cells are variable according to radiation intensity and temperature so in order to connect with grid the output voltage should be fixed and converted to AC voltage and this job will be done by an inverter. A very effective control system has been developed for the inverter based on pulse width modulation. This paper presents an intensive performance and dynamic behavior of a grid related PV energy conversion system. The PV system is developed and simulated with the help of MATLAB Simulink software environment. Abhishek Verma | Dr. Anup Mishra | Brahma Nand Thakur "Analysis and Simulation of Solar PV Connected with Grid Accomplished with Boost Converter and PWM Based Inverter" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-3 , April 2021, URL: https://www.ijtsrd.com/papers/ijtsrd40056.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/40056/analysis-and-simulation-of-solar-pv-connected-with-grid-accomplished-with-boost-converter-and-pwm-based-inverter/abhishek-verma
Simulation of a 13-Level Inverter with Facts Capability for Distributed Energ...IJMTST Journal
This Paper Presents A whole New resonant twin active bridge(DAB) topology, that uses a tuned inductor-capacitor-inductor(LCL) network. As compared to ancient DAB topologies, the planned topologies significantly reduced the bridge current, lowering every physical phenomenon and alter losses and conjointly VA rating associated with the bridges. The performance of the DAB is investigated using a mathematical model at a lower place varied operational conditions. Experiment results of a model is reduced the outflow current of the circuit. are presented with discussion to demonstrate the improved performance of the LCL DAB topology. Result clearly that the planned DAB Topology provide higher efficiency over an oversized vary of every input voltage and as compared to ancient DAB topology
Design and fabrication of rotor lateral shifting in the axial-flux permanent-...IJECEIAES
The development of axial-flux permanent-magnet (AFPM) machines has become a mature technology. The single-stator double-rotor (SSDR) AFPM structure has advantages on the compactness and the low up to medium power applications so the microscale size and low-cost applications are reachable to be designed. The research main objectives are designing and manufacturing the lateral shifting from the north poles of the first rotor face the north poles of the second rotor (NN) to the north poles of the first rotor face the south poles of the second rotor (NS) categories as well as finding the best performance of the proposed method and implementing in a low cost and micro-scale AFPMG. The novel lateral shifting on the one of the rotors shows performance at 19.2 0 has the highest efficiency at 88.39% during lateral shifting from N–N (0 0 ) to N–S (36 0 ) on rotor 2.
In the microgrid systems, three-phase inverter becomes the main power electronic interface for renewable distributed energy resources (DERs), especially for the islanded microgrids in which the power quality is easily affected by unbalanced and nonlinear loads, this is due to the fact that the voltage and frequency of the microgrid are not supported by the main power grid but determined only by the inverters. Therefore, the compensation of the load unbalances and harmonics in autonomous microgrid inverters are getting more attention in power quality research areas. The main purpose of this paper is to represent an overview of the control strategies of various inverters for unbalanced load compensation.
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.
An Improved Single Phase Transformer less Inverter Topology for Cost Effecti...IJMER
In grid connected PV systems, the elimination of isolation transformer introduces common
mode leakage current due to the parasitic capacitance between PV panels and the ground. The common
mode leakage current reduces the efficiency of power conversion stage, affects the quality of grid
current, deteriorate the electric magnetic compatibility and give rise to various safety threats. In order
to eliminate the leakage current, an improved transformer less topology with virtual DC bus concept is
proposed here. By connecting the grid neutral line directly to the negative pole of the DC bus, the stray
capacitance between the PV panels and the ground is bypassed. The topology consists of only five power
switches, two capacitors and the filter section. Therefore, the power electronics cost can be curtailed.
This advanced topology can be modulated with the sinusoidal pulse width modulation (SPWM) to reduce
the output current ripple. The simulation result of the proposed topology using MATLAB/SIMULINK is
presented.
Open-Delta VSC Based Voltage Controller in Isolated Power SystemsIJPEDS-IAES
This paper proposes a reduced switch voltage source converter (VSC)
topology implemented as a voltage controller in isolated power systems. In
isolated power systems generally self-excited induction generators (SEIG)
are used mainly for their ruggedness and economic reasons. Mostly for
constant power applications such as pico hydro uncontrolled turbine driven
self excited induction generators feeding three-phase loads are employed.
The proposed reduced switch voltage controller is used to regulate and
control the voltage at the generator terminals as it is subjected to voltage
drops, dips or flickers when the isolated power system is subjected to various
critical loads. In this paper the controller is realized using a three-leg fourswitch
insulated gate bipolar transistor (IGBT) based current controlled
voltage-source converter (CC-VSC) and a self-supporting dc bus containing
two split capacitors, thus reducing the IGBT count and hence cost. This
reduced switch topology forms an Open-Delta type converter. The proposed
generating system along with the controller is modeled and simulated in
MATLAB along with Simulink and power system blockset (PSB) toolboxes.
The system is simulated and the capability of the isolated generating system
along with the reduced switch based voltage controller is presented here
where the generator feeds linear and non-linear loads are investigated.
This paper presents the design and the implementation of a new microcontroller-based solar
Power inverter. The aim of this paper is to design single phase inverter which can convert DC voltage
to AC voltage at high efficiency and low cost. Solar and wind powered electricity generation are
being favored nowadays as the world increasingly focuses on environmental concerns. Power
inverters, which convert solar-cell DC into domestic-use AC, are one of the key technologies for
delivering efficient AC power The hardware and software design are oriented towards a single-chip
microcontroller-based system, hence minimizing the size and cost. With this new approach the
modularization of the conversion from solar power to electric power at its maximum power point can
be made more compact and more reliable.
Push-Pull Converter Fed Three-Phase Inverter for Residential and Motor LoadIJPEDS-IAES
The proposed paper is an new approach for power conditioning of a PV
(photo-voltaic) cell array. The main objective is to investigate an approach to
provide and improve the delivered electric energy by means of power
conditioning structures with the use of alternative renewable resources
(ARRs) for remote rural residential or industrial non-linear loads. This
approach employs a series-combined connected boost and buck boost DCDC
converter for power conditioning of the dc voltage provided by a photovoltaic
array. The input voltage to the combined converters is 100 V
provided from two series connected PV cells, which is converted and
increased to 200 V at the dc output voltage. Series-combined connected
boost and buck-boost DC-DC converters operate alternatively. This helps to
reduce the input ripple current and provide the required 400 Vdc on a
sinusoidal PWM three-phase inverter. Analysis of the two series-combined
DC-DC converters is presented along with simulation results. Simulations of
the series-combined DC-DC converters are presented with an output DC
voltage of 200 V and a maximum output load of Po=600 W.
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.
Design and Development of Digital control based Asymmetric Multilevel Inverte...idescitation
Multilevel inverter is an effective topology for
increasing power demand and reducing harmonics of AC
waveforms. This paper presents an efficient seven-level
asymmetric cascaded multilevel inverter suited for renewable
energy applications. A digital control method employing flip-
flops has been proposed which reduces Total Harmonic
Distortion (THD) and switching losses compared to the
conventional PWM technique. Various performance
parameters namely THD, switching loss, first-order distortion
factor (DF1) and second-order distortion factor (DF2) is
analyzed and a simulation model of the proposed digital
control is developed in MATLAB/SIMULINK. Hardware
prototype will be built to validate the results.
Design and simulation of cascaded H- bridge multilevel inverter based dstatco...Asoka Technologies
This paper presents an investigation of five-Level Cascaded H - bridge (CHB) Inverter as Distribution Static Compensator (DSTATCOM) in Power System (PS) for compensation of reactive power and harmonics. The advantages of CHB inverter are low harmonic distortion, reduced number of switches and suppression of switching losses. The DST ATCOM helps to improve the power factor and eliminate the Total Harmonics Distortion (THD) drawn from a Non-Liner Diode Rectifier Load (NLDRL). The D-Q reference frame theory is used to generate the reference compensating currents for DSTATCOM while Proportional and Integral (PI) control is used for capacitor dc voltage regulation. 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.
Single Phase Matrix Converter for Input Power Factor Improvementiosrjce
IOSR Journal of Electrical and Electronics Engineering(IOSR-JEEE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of electrical and electronics engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in electrical and electronics engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Application of single phase matrix converter topology to an uninterruptible 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
Analysis and Simulation of Solar PV Connected with Grid Accomplished with Boo...YogeshIJTSRD
This paper deals with a solar PV array connected with grid system. This system consists of PV cells with 30 KW system, Boost converter, three phase inverter with suitable control system and three phase load. This paper gives analysis of each components of the system. The output voltage from the solar PV cells are variable according to radiation intensity and temperature so in order to connect with grid the output voltage should be fixed and converted to AC voltage and this job will be done by an inverter. A very effective control system has been developed for the inverter based on pulse width modulation. This paper presents an intensive performance and dynamic behavior of a grid related PV energy conversion system. The PV system is developed and simulated with the help of MATLAB Simulink software environment. Abhishek Verma | Dr. Anup Mishra | Brahma Nand Thakur "Analysis and Simulation of Solar PV Connected with Grid Accomplished with Boost Converter and PWM Based Inverter" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-3 , April 2021, URL: https://www.ijtsrd.com/papers/ijtsrd40056.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/40056/analysis-and-simulation-of-solar-pv-connected-with-grid-accomplished-with-boost-converter-and-pwm-based-inverter/abhishek-verma
Simulation of a 13-Level Inverter with Facts Capability for Distributed Energ...IJMTST Journal
This Paper Presents A whole New resonant twin active bridge(DAB) topology, that uses a tuned inductor-capacitor-inductor(LCL) network. As compared to ancient DAB topologies, the planned topologies significantly reduced the bridge current, lowering every physical phenomenon and alter losses and conjointly VA rating associated with the bridges. The performance of the DAB is investigated using a mathematical model at a lower place varied operational conditions. Experiment results of a model is reduced the outflow current of the circuit. are presented with discussion to demonstrate the improved performance of the LCL DAB topology. Result clearly that the planned DAB Topology provide higher efficiency over an oversized vary of every input voltage and as compared to ancient DAB topology
Design and fabrication of rotor lateral shifting in the axial-flux permanent-...IJECEIAES
The development of axial-flux permanent-magnet (AFPM) machines has become a mature technology. The single-stator double-rotor (SSDR) AFPM structure has advantages on the compactness and the low up to medium power applications so the microscale size and low-cost applications are reachable to be designed. The research main objectives are designing and manufacturing the lateral shifting from the north poles of the first rotor face the north poles of the second rotor (NN) to the north poles of the first rotor face the south poles of the second rotor (NS) categories as well as finding the best performance of the proposed method and implementing in a low cost and micro-scale AFPMG. The novel lateral shifting on the one of the rotors shows performance at 19.2 0 has the highest efficiency at 88.39% during lateral shifting from N–N (0 0 ) to N–S (36 0 ) on rotor 2.
In the microgrid systems, three-phase inverter becomes the main power electronic interface for renewable distributed energy resources (DERs), especially for the islanded microgrids in which the power quality is easily affected by unbalanced and nonlinear loads, this is due to the fact that the voltage and frequency of the microgrid are not supported by the main power grid but determined only by the inverters. Therefore, the compensation of the load unbalances and harmonics in autonomous microgrid inverters are getting more attention in power quality research areas. The main purpose of this paper is to represent an overview of the control strategies of various inverters for unbalanced load compensation.
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.
An Improved Single Phase Transformer less Inverter Topology for Cost Effecti...IJMER
In grid connected PV systems, the elimination of isolation transformer introduces common
mode leakage current due to the parasitic capacitance between PV panels and the ground. The common
mode leakage current reduces the efficiency of power conversion stage, affects the quality of grid
current, deteriorate the electric magnetic compatibility and give rise to various safety threats. In order
to eliminate the leakage current, an improved transformer less topology with virtual DC bus concept is
proposed here. By connecting the grid neutral line directly to the negative pole of the DC bus, the stray
capacitance between the PV panels and the ground is bypassed. The topology consists of only five power
switches, two capacitors and the filter section. Therefore, the power electronics cost can be curtailed.
This advanced topology can be modulated with the sinusoidal pulse width modulation (SPWM) to reduce
the output current ripple. The simulation result of the proposed topology using MATLAB/SIMULINK is
presented.
Open-Delta VSC Based Voltage Controller in Isolated Power SystemsIJPEDS-IAES
This paper proposes a reduced switch voltage source converter (VSC)
topology implemented as a voltage controller in isolated power systems. In
isolated power systems generally self-excited induction generators (SEIG)
are used mainly for their ruggedness and economic reasons. Mostly for
constant power applications such as pico hydro uncontrolled turbine driven
self excited induction generators feeding three-phase loads are employed.
The proposed reduced switch voltage controller is used to regulate and
control the voltage at the generator terminals as it is subjected to voltage
drops, dips or flickers when the isolated power system is subjected to various
critical loads. In this paper the controller is realized using a three-leg fourswitch
insulated gate bipolar transistor (IGBT) based current controlled
voltage-source converter (CC-VSC) and a self-supporting dc bus containing
two split capacitors, thus reducing the IGBT count and hence cost. This
reduced switch topology forms an Open-Delta type converter. The proposed
generating system along with the controller is modeled and simulated in
MATLAB along with Simulink and power system blockset (PSB) toolboxes.
The system is simulated and the capability of the isolated generating system
along with the reduced switch based voltage controller is presented here
where the generator feeds linear and non-linear loads are investigated.
This paper presents the design and the implementation of a new microcontroller-based solar
Power inverter. The aim of this paper is to design single phase inverter which can convert DC voltage
to AC voltage at high efficiency and low cost. Solar and wind powered electricity generation are
being favored nowadays as the world increasingly focuses on environmental concerns. Power
inverters, which convert solar-cell DC into domestic-use AC, are one of the key technologies for
delivering efficient AC power The hardware and software design are oriented towards a single-chip
microcontroller-based system, hence minimizing the size and cost. With this new approach the
modularization of the conversion from solar power to electric power at its maximum power point can
be made more compact and more reliable.
Push-Pull Converter Fed Three-Phase Inverter for Residential and Motor LoadIJPEDS-IAES
The proposed paper is an new approach for power conditioning of a PV
(photo-voltaic) cell array. The main objective is to investigate an approach to
provide and improve the delivered electric energy by means of power
conditioning structures with the use of alternative renewable resources
(ARRs) for remote rural residential or industrial non-linear loads. This
approach employs a series-combined connected boost and buck boost DCDC
converter for power conditioning of the dc voltage provided by a photovoltaic
array. The input voltage to the combined converters is 100 V
provided from two series connected PV cells, which is converted and
increased to 200 V at the dc output voltage. Series-combined connected
boost and buck-boost DC-DC converters operate alternatively. This helps to
reduce the input ripple current and provide the required 400 Vdc on a
sinusoidal PWM three-phase inverter. Analysis of the two series-combined
DC-DC converters is presented along with simulation results. Simulations of
the series-combined DC-DC converters are presented with an output DC
voltage of 200 V and a maximum output load of Po=600 W.
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.
Design and Development of Digital control based Asymmetric Multilevel Inverte...idescitation
Multilevel inverter is an effective topology for
increasing power demand and reducing harmonics of AC
waveforms. This paper presents an efficient seven-level
asymmetric cascaded multilevel inverter suited for renewable
energy applications. A digital control method employing flip-
flops has been proposed which reduces Total Harmonic
Distortion (THD) and switching losses compared to the
conventional PWM technique. Various performance
parameters namely THD, switching loss, first-order distortion
factor (DF1) and second-order distortion factor (DF2) is
analyzed and a simulation model of the proposed digital
control is developed in MATLAB/SIMULINK. Hardware
prototype will be built to validate the results.
Design and simulation of cascaded H- bridge multilevel inverter based dstatco...Asoka Technologies
This paper presents an investigation of five-Level Cascaded H - bridge (CHB) Inverter as Distribution Static Compensator (DSTATCOM) in Power System (PS) for compensation of reactive power and harmonics. The advantages of CHB inverter are low harmonic distortion, reduced number of switches and suppression of switching losses. The DST ATCOM helps to improve the power factor and eliminate the Total Harmonics Distortion (THD) drawn from a Non-Liner Diode Rectifier Load (NLDRL). The D-Q reference frame theory is used to generate the reference compensating currents for DSTATCOM while Proportional and Integral (PI) control is used for capacitor dc voltage regulation. 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.
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).
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.
A single phase cascaded multilevel inverter based on a new basic unit with re...LeMeniz Infotech
A single phase cascaded multilevel inverter based on a new basic unit with reduced number of power switches
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
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.
A DC-DC Converter with Ripple Current Cancellation Based On Duty Cycle SelectionIJMER
In this paper a boost dc-dc converter is proposed based on the concept of ripple current cancellation. This proposed system has the novel capability of cancelling the input current ripple at an arbitrarily preselected duty cycle. This is accomplished without increasing the count of the number of components in contrast to other solutions available in the conventional system. In addition to this, the converter also features a high voltage gain without utilizing extreme values of duty cycle or boosting transformers. These features make the converter ideal to process electric power coming from low-voltage power-generating sources, such as renewables. This system also provides details on the principle of operation via topological considerations and a mathematical model. The key factor of reactive component sizing is also discussed in detail. The proposed boost dc-dc converter is evaluated by simulating in MATLAB/Simulink software.
The intention of this paper is to identify a suitable controller for closed loop multi converter system for multiple input sources and to improve time response of high-gain-step up-converter. Closed-loop Multi Converter System (MCS) is utilized to regulate load-voltage. This effort recommends suitable-controller for closed-two loop-controlled-SEPIC-REBOOST Converter fed DC motor. The estimation of the yield in open-two loop and closed- two-loop-circuit has been done using MATLAB or Simulink. Closed-two loop-control of Multi Converter System with Propotional+Integral (PI)- Propotional+Integral (PI) and Proportional+Resonant (PR) - Proportional+Resonant (PR) Controllers are investigated and their responses are evaluated in conditions of rise time, peak time, settling time and steady state error. It is seen that current-mode PR-PR controlled MCS gives better time domain response in terms of motor speed. A Prototype of MCS has been fabricated in the laboratory and the experimental-results are authenticated with the simulation-results.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Computer Science
Active and Programmable Networks
Active safety systems
Ad Hoc & Sensor Network
Ad hoc networks for pervasive communications
Adaptive, autonomic and context-aware computing
Advance Computing technology and their application
Advanced Computing Architectures and New Programming Models
Advanced control and measurement
Aeronautical Engineering,
Agent-based middleware
Alert applications
Automotive, marine and aero-space control and all other control applications
Autonomic and self-managing middleware
Autonomous vehicle
Biochemistry
Bioinformatics
BioTechnology(Chemistry, Mathematics, Statistics, Geology)
Broadband and intelligent networks
Broadband wireless technologies
CAD/CAM/CAT/CIM
Call admission and flow/congestion control
Capacity planning and dimensioning
Changing Access to Patient Information
Channel capacity modelling and analysis
Civil Engineering,
Cloud Computing and Applications
Collaborative applications
Communication application
Communication architectures for pervasive computing
Communication systems
Computational intelligence
Computer and microprocessor-based control
Computer Architecture and Embedded Systems
Computer Business
Computer Sciences and Applications
Computer Vision
Computer-based information systems in health care
Computing Ethics
Computing Practices & Applications
Congestion and/or Flow Control
Content Distribution
Context-awareness and middleware
Creativity in Internet management and retailing
Cross-layer design and Physical layer based issue
Cryptography
Data Base Management
Data fusion
Data Mining
Data retrieval
Data Storage Management
Decision analysis methods
Decision making
Digital Economy and Digital Divide
Digital signal processing theory
Distributed Sensor Networks
Drives automation
Drug Design,
Drug Development
DSP implementation
E-Business
E-Commerce
E-Government
Electronic transceiver device for Retail Marketing Industries
Electronics Engineering,
Embeded Computer System
Emerging advances in business and its applications
Emerging signal processing areas
Enabling technologies for pervasive systems
Energy-efficient and green pervasive computing
Environmental Engineering,
Estimation and identification techniques
Evaluation techniques for middleware solutions
Event-based, publish/subscribe, and message-oriented middleware
Evolutionary computing and intelligent systems
Expert approaches
Facilities planning and management
Flexible manufacturing systems
Formal methods and tools for designing
Fuzzy algorithms
Fuzzy logics
GPS and location-based app
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.
Implementation of a grid-tied emergency back-up power supply for medium and l...IJECEIAES
Emergency back-up power supply units are necessary in case of grid power shortage, considerably poor regulation and costly establishment of a power system facility. In this regard, power electronic converters based systems emerge as consistent, properly controlled and inexpensive electrical energy providers. This paper presents an implemented design of a grid-tied emergency back-up power supply for medium and low power applications. There are a rectifier-link boost derived DC-DC battery charging circuit and a 4-switch push-pull power inverter (DC-AC) circuit, which are controlled by pulse width modulation (PWM) signals. A changeover relay based transfer switch controls the power flow towards the utility loads. During off-grid situations, loads are fed power by the proposed system and during on-grid situations, battery is charged by an AC-link rectifier-fed boost converter. Charging phenomenon of the battery is controlled by a relay switched protection circuit. Laboratory experiments are carried out extensively for different loads. Power quality assessments along with back-up durations are recorded and analyzed. In addition, a cost allocation affirms the economic feasibility of the proposed framework in case of reasonable consumer applications. The test-bed results corroborate the reliability of the research work.
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.
Similar to A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy Storage and Power Distribution (20)
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.
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.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
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/
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Quality defects in TMT Bars, Possible causes and Potential Solutions.
A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy Storage and Power Distribution
1. IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
e-ISSN: 2278-1676,p-ISSN: 2320-3331, Volume 8, Issue 4 (Nov. - Dec. 2013), PP 75-83
www.iosrjournals.org
www.iosrjournals.org 75 | Page
A New Topology for High Level Hybrid Cascaded Multilevel
Inverter Motor Drive with Energy Storage and Power
Distribution
Ch.Sajan1
, T.Praveen Kumar2
, B.Rajashekar3
, K.Srilatha4
1
(Associate Professor, Department of EEE, Jyothishmathi Institute of Technology and Science, Karimnagar,
Andhra Pradesh, India)
2
(Associate Professor, Department of EEE, Jyothishmathi Institute of Technology and Science, Karimnagar,
Andhra Pradesh, India)
3
(M.Tech. Student, Department of EEE, Jyothishmathi Institute of Technology and Science, Karimnagar,
Andhra Pradesh, India)
4
(M.Tech. Student, Department of EEE, Jyothishmathi Institute of Technology and Science, Karimnagar,
Andhra Pradesh, India)
Abstract: In this paper a new topology is proposed for energy storage and the power distribution using Ultra-
capacitors in cascaded multilevel inverters. This consists of hybrid cascaded multilevel inverter (HCMI)
topologies and corresponding control strategies are applied to motor drive, interfacing both dc sources and
capacitor energy storage elements. For high power motor drive application this proposed topology has a
capability to produce high voltage at fundamental switching frequency makes it possible to use switches with
low voltage and current ratings. The major advantages of this proposed control method are reduced switching
loss, improved efficiency with less number of dc sources, elimination of harmonics and the ability of the
capacitor voltage to be successfully maintained at the desired value when the machine is in transient state. In
this paper a 7-level cascaded multilevel inverter with motor drive is considered. Finally, the simulation results
validate the concept of this topology.
Keywords: Hybrid cascaded multilevel converter, Energy storage, power distribution, Ultra-capacitors, motor
drive.
I. Introduction
Electrical energy storage is emerging as a key technology with applications in areas such as improved
reliability and power quality in the utility sector and other non-stationary power applications, integration of
renewable sources into distributed generation systems, improved energy efficiency and productivity in
conventional power generation plants, and regenerative motor drive systems. Ultra-capacitors are different from
the other type of capacitors mainly because their specific capacitance, [F/dm3] and energy density, [kJ/dm3] are
several orders of magnitudes larger than that of electrolytic capacitors. The ultra-capacitor as an energy storage
device dedicated for power conversion applications. In comparison to state of the art electrochemical batteries,
the ultra-capacitors have higher power density, higher efficiency, longer lifetime and greater cycling capability.
In comparison to the state of the art electrolytic capacitors, the ultra-capacitors have higher energy density. All
these advantages make the ultra-capacitors good candidate for many power conversion applications.
Energy storage systems can be characterized by their specific requirements such as power levels,
energy storage capacity, and response time (determined by storage times or discharge times).With the ultra-
capacitor bank, it has the advantage of assisting the battery to provide energy boost during acceleration and to
capture/gain regenerative energy during deceleration or braking. Energy storage can also function as a backup
for supply failures. Conventionally, the power electronics/applications interface for ultra-capacitors is realized
using a bidirectional dc-dc converter (buck/boost) to control power flow into and out of the ultra-capacitor, as
shown in Fig.1.
Figure.1.Conventional energy storage system (ESS) topology.
2. A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy
www.iosrjournals.org 76 | Page
The dc-dc converter ensures that a constant dc-link voltage is obtained, regardless of variations of ultra-
capacitor voltage. In low to medium power motor drive applications, dc-dc converters have several advantages
such as high efficiency, fast transients, ease of control of power distribution between the dc energy source and
the ultra-capacitor and higher power density. However, for high power applications, the efficiency of the dc-dc
converter degrades very significantly and the associated high currents also increase electrical and thermal stress
on the components and devices.
The cascaded multilevel inverter was invented for use in medium to high power applications. The
traditional cascaded multilevel inverter interfaces DC energy sources. The advantages of cascaded multilevel
inverters are:
Requires less number of components per level.
Modularized structure without clamping components.
Simple voltage balancing modulation.
In the topology proposed in [3], the capacitor bank can only compensate for voltage harmonics in the
bulk/main converter output and does not provide active power compensation. The topology in [5] can provide
limited real power compensation, but no reactive power compensation. Therefore, there is the need to develop a
topology and control methodology that can provide both active and reactive power compensation to optimize the
performance of the motor drive system.
II. Proposed Topology
This paper proposes hybrid cascaded multilevel inverter topologies and corresponding control
strategies applied to motor drive, interfacing both dc sources and capacitor energy storage elements.
Hence;
In the proposed topology, the capacitor is controlled to provide reactive power to cancel lower order
harmonics through a conditioning converter.
In the modified proposed topology, the capacitor energy storage can be controlled not only to provide
reactive power compensation to improve on power quality, but also to provide real power during acceleration,
and absorb regenerative power during deceleration or braking period.
The multilevel inverter topologies and their respective control strategies each have some inherent
advantages that make them suitable for different motor drive applications.
This proposed topology consists of one common converter neutral end (o) and three output ends (a, b,
and c) shown in Fig.2. Each phase consists of two H-bridges connected in series. Compared to the conventional
cascaded H-bridge multilevel inverter, only one dc energy source is used in each phase, while the other energy
source is replaced by a capacitor. The value of voltage across the capacitor is half of the dc source value. The H-
bridge with dc source is termed as main converter and with capacitor is termed as conditional converter. This
structure is favorable for high power drive applications since it provides the capacity to produce high voltage
with low switching frequency. It also improves the reliability by reducing the number of dc sources.
In the proposed topology, the capacitor is controlled to provide reactive power to cancel lower order
harmonics through a conditioning converter. The main converter supplied by a DC source can therefore be
controlled to provide real power with reduced switching loss and improved efficiency. Analysis approach for the
interaction between modulation index and displacement power factor has been developed to establish the
capacitor charging and discharging conditions for induction machine load. A major advantage of the proposed
control method is the ability of the capacitor voltage to be successfully maintained at the desired value when the
machine is in transient state, which is a key contribution.
Figure.2: Circuit diagram for Proposed Topology (HCMI).
3. A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy
www.iosrjournals.org 77 | Page
The relationship between the output voltage and the switching function S is shown in table1. The
redundant switching states (RSS) are utilized for capacitor voltage regulation.
Table.1: Output voltage vs. switching function.
The output voltage and the switching angles of the proposed topology are shown in Fig.3 and Fig.4.
Figure.3: Voltage output of HCMI.
Figure.4: Switching scheme for HCMI. a) Capacitor charging cycle. b) Capacitor discharging cycle.
For a three-phase system, the triple harmonics are cancelled in the line-line voltage. The switching
angles θ1, θ2, and θ3 can be found by solving the following equations:
2Vdc/π [cos (θ1) + cos (θ2) + cos (θ3)] = V1
Cos (5θ1) + cos (5θ2) + cos (5θ3) = 0
Cos (7θ1) + cos (7θ2) + cos (7θ3) = 0
These three equations are derived from the Fourier series expansion of the 7-level equal step waveform.
The second and third equations are used to eliminate the 5th and 7th harmonics. The first equation adjusts the
magnitude of the desired fundamental waveform, where V1 is the peak of the fundamental voltage. The
4. A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy
www.iosrjournals.org 78 | Page
capacitor voltage is regulated by choosing the appropriate switching function when the output voltage is set to −
Vdc / 2 or Vdc / 2.
This topology can also be modified such as not only to provide reactive power compensation to
improve on power quality, but also to provide real power during acceleration and absorb regenerative power
during deceleration or braking period by controlling capacitor energy storage.
Each phase of the modified proposed topology splits the supply of real power between a “main” converter
supplied by a dc source, and two “auxiliary” converters supplied by energy storage elements. A hybrid
modulation strategy combining sinusoidal pulse width modulation (SPWM) with phase-shift control is adopted
for this topology. The motor drive control scheme is given as;
i. Power distribution control to split the supply of real power between the main and auxiliary converters.
ii. voltage balancing control of energy storage elements, firstly to ensure that each capacitor voltage is
regulated to the desired value, secondly to ensure voltage balance between all the capacitors in each
cascaded converter phase or cluster, thirdly to ensure voltage balance between t three clusters of single-
phase cascaded converters, and lastly to obtain balanced ac output current by forcing the converter
neutral point current to zero.
This modified proposed topology consists of three single-phase cascaded H-bridge pulse-width modulated
converters per phase, connected in series. Similar to proposed topology, this modified proposed topology
consists of a common or neutral point (o), and three output ends (a, b, and c). Fig.5 below shows the circuit
topology of the modified HCMI.
Figure.5: Modified proposed topology (HCMI).
Figure.6: Voltage output for main converter.
The output voltage of each phase is shown in Fig.6 above. The output voltage is the sum of the
individual voltage outputs of each of the three H-bridges. The higher voltage or main converter is powered by a
dc source while the other two H-bridges are supplied by a capacitor. Similar to topology I, topology II is a good
candidate for high power motor drive applications since it has the capacity to produced high voltage while
5. A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy
www.iosrjournals.org 79 | Page
switching at fundamental frequency. Switching at fundamental frequency makes it possible to use power
electronics switches with low voltage and current ratings. In this proposed topology, the cascaded multilevel
converter is not only used for reactive power compensation to improve on power quality, but also as an energy
storage system to provide real power during acceleration and absorb regenerative power during deceleration or
braking.
III. Operational Modes
The operation of modified proposed topology depends on the power requirement for regenerative
motor drive system such as EVs and HEVs in any drive cycle is characterized by line peak power demands
during acceleration and braking periods.
The different operational modes of the modified proposed topology are explained as:
i) Constant Speed Mode:
The constant speed mode for the modified proposed topology gives the average line power during this
period is provided by the dc energy source, which at the same time, also charges the ultra-capacitors. In this
case, the lower level converters powered by the ultra-capacitors only provide harmonic compensation to the
main converter and do not supply any real average power. Electromagnetic torque requirement for this segment
is also minimal. The charging and discharging periods and states are shown in below Fig.7.
Figure.7: Real power flow during constant speed mode.
ii) Acceleration Mode:
The acceleration mode of the modified proposed topology is most of the peak power demand for this
period is supplied by the ultra-capacitor. The advantages are two fold: firstly, it reduces stress on the battery
thereby extending the battery lifespan. Secondly, it greatly reduces the battery size. In this segment, the dc
voltage of the ultra-capacitor is not controlled to a particular reference, but is allowed to vary between a
maximum value of 75V and a minimum value of 37.5V, so that the ultra-capacitor can function as energy
storage. The energy provided by the ultra-capacitor is given as;
W= 1/2C (Vcmax2
-Vcmin2
)
A very effective power distribution scheme will be designed to share the distribution of real power
between the battery and the ultra-capacitor. The charging and discharging periods and states are shown in below
Fig.8.
Figure.8: Real power flow during acceleration mode.
6. A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy
www.iosrjournals.org 80 | Page
iii) Deceleration Mode:
The deceleration period, in which regenerative energy from the induction machine flows back into the
system. Due to its quick recharge capability, the ultra-capacitor assists the battery during this period in
recuperating the regenerative braking energy. Some of the regenerative energy captured is used to recharge the
capacitor up to its maximum voltage. The ultra-capacitor is sized to be large enough to absorb as much of this
energy as possible. The charging and discharging periods and states are shown in below Fig.9.
Figure.9: Real power flow during deceleration mode.
iv) Startup Mode:
The energy storage system will require pre-charging of the ultra-capacitors during machine start-up, a
process that normally lasts several seconds. This section examines a fast and very efficient method for pre-
charging the ultra-capacitors. During start-up, the dc energy source will be controlled to supply energy only to
the ultra-capacitors. After the ultra-capacitors have been charged up to the desired operating voltage, the system
control will switch to normal operation, supplying power to the induction motor. The control strategy will also
ensure a smooth transition from start-up mode to normal operation mode.
v) Standstill Mode:
During standstill, neither the dc energy source nor the ESE supplies any power, since there is no power
requirement for the motor drive during this period.
IV. Simulation Result
Simulation results were obtained by co-simulation using Matlab and PSIM software, and also using the
same induction motor models to proposed topology shown in below Fig.10.
Figure.10: Modified proposed topology (HCMI) circuit model in PSIM.
The three sub-circuits label Phase-A, Phase-B, and Phase-C represents the three phases of the cascaded
multilevel inverter. The fourth sub-circuit labeled load passes the cascaded inverter load current to Simulink,
and also receives the induction motor load current from Simulink.
7. A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy
www.iosrjournals.org 81 | Page
Figure.11: Detail view of phase-A Modified proposed topology (HCMI).
Simulation results give the Real power supply by dc source and ultra-capacitors, main and conditional
converters output voltages and developed torque and load torque shown in below Fig.12, Fig.13 and Fig.14
respectively.
Figure.12: Real power supply by both dc source and ultra-capacitors.
Figure.13: Main and conditional inverters output voltages.
8. A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy
www.iosrjournals.org 82 | Page
Figure.14: Developed torque and load torque.
From the above discussion, the energy storage using ultra capacitors is most advantageous compared
with the other energy storage devices. In comparison to electrochemical batteries, the energy density is lower
while the power density is larger than that of conventional batteries. Cycling capability is also significantly
better compared to batteries. Table 2 compares the most important properties of the ultra-capacitor versus
batteries and other type of capacitors.
Table-2: Properties of the existing energy storage devices.
Capacitors Ultra capacitors Electro chemical batteries
Energy density[wh/kg] ~0.1 1-6 ~100
Peak power
density[kw/kg]
104
2-20 0.1-0.5
Number of cycle 1010
106
-102
Life time[years] -10 -15 -5
V. Power Distribution
The power requirement of a regenerative motor drive depends on the different drive modes, which
include standstill, startup, acceleration, deceleration, and constant speed, which were explained in above
proposed topology. This section focuses mainly on the peak power requirement during acceleration and braking
and how to distribute the supply or absorption of peak power between the dc energy source and the ESE. Fig.15
shows the real power, electromagnetic torque, and the capacitor voltage variation during acceleration and
braking periods. During the constant drive period, the dc source supplies all the power required by the motor
drive and also charges the energy storage elements. At the same time, the ESE also provides harmonic
compensation to the main converter output voltage. During acceleration, both the ESE and the dc source supply
peak power to the motor drive. As shown in Fig.15, the UC voltage is allowed to vary between VCmax and
VCmin in order to supply real power to the motor drive. During deceleration, the regenerative energy from the
motor drive is captured by the ESE and used to charge both the ESE and the dc energy source.
Figure.15: Real power, electromagnetic torque and capacitor voltage during acceleration, deceleration, and
constant drive periods.
9. A New Topology for High Level Hybrid Cascaded Multilevel Inverter Motor Drive with Energy
www.iosrjournals.org 83 | Page
In this way, the dc source provides real power proportional to the magnitude of the fundamental
voltage output of the main converter. This method guarantees a smooth transition from one drive mode to the
other when compared to the constant current supply control method, especially in low power induction motor
drive applications that have a small mechanical inertia.
VI. Perspectives For Future Work
1. Extend the modulation index range of operation of proposed topology by using a combination of
different switching schemes to achieve the fundamental voltage component while eliminating the 5th and 7th
harmonics.
2. Battery mode control needs to be incorporated into the system to regulate battery discharge during
acceleration, and battery charging during deceleration, for longer life and better system performance.
3. With increasing the number of levels at the output voltage to obtain near sinusoidal wave and
propose more power distribution strategies and do a comparative analysis to show the most optimized method.
VII. Conclusion
In this paper a new topology has been provided for energy storage and power distribution using ultra-
capacitors as they have higher power density, higher efficiency, longer life and greater cycling capability with
hybrid cascaded multilevel inverter topologies for high performance motor drive applications. In this topology,
this is totally focused on the energy storage, harmonics elimination, and power distribution. With the proposed
topology, the ultra capacitors provide reactive power to eliminate 5th and 7th harmonics by maintaining the
capacitor voltage at the desired value, even in the transient state. And with the modified proposed topology, the
capacitors are controlled to not only supply reactive power compensation during constant drive, but to be able to
provide real power compensation to the main converter during peak power demands. Finally, and overall system
level simulation is provided to verify the working principle of the proposed topologies.
References
[1] R. M. Schupbach and J. C. Balda, “35kW ultracapacitor unit for power management of hybrid electric vehicle: bi-directional dc-dc
converter design,” In Proc of PESC’04, pp. 2157-2163, Aachen 2004.
[2] Sang-Min Kim and Seung-Ki Sul, ”Control of rubber tyred gantry crane with energy storage based on supercapacitor bank,” IEEE
Trans. Power Electronics, Vol. 21, No. 5,pp. 1420-1427, September 2006.
[5] S. Lu, K.A. Corzine, M. Ferdowsi, “A new method of utilizing ultracapacitor energy sources in hybrid electric vehicles over a wide
speed range,” IEEE APEC’07, Feb. 25-Mar. 01, 2007, pp. 222-228.
[6] A. T. de Almedia, F. J. T. E. Ferriera, and D. Both, “Technical and economical consideration in the application of variable speed
drives with electric motor systems”, IEEE Trans. Industry Applications, Vol. 41, No. 1, pp. 188-199, January/February 2005.
[7] R. A. Epperly, F. L. Hoadley and R. W. Piefer, "Considerations when applying ASD’s in continuous processes," IEEE Trans.
Industry Applications, Vol. 33, pp 389-396, March/April 1997.
[8] C. J. Melhorn, A. Braz, P. Hofmann and R. J. Mauro, “An evaluation of energy storage techniques for improving ride-through
capability for sensitive customers on underground networks,” IEEE Trans. Industry Applications, Vol. 33, No. 4, pp.1083-1095,
July/August 1997.
[9] A. Van Zyl, R. Spee, A. Faveluke and S.Bhowmik, “Voltage sag ride-through for adjustable-speed drives with active rectifiers,”
IEEE Trans. Industry Applications, Vol. 34, pp 1270-1277, November/December 1998.
[10] A. von Jouanne, P. N. Enjeti and B. Banerjee, “Assessment of ride-through alternatives for adjustable-speed drives,” IEEE Trans.
Industry Applications, Vol. 35, No. 4, pp. 908-916, July/August 1999.
[11] M; H.J. Bollen, "Understanding power quality problems, voltage sags and interruptions", IEEE Press Series on Power Engineering,
2000.
[12] D. A. Paice, “Power electronic converter harmonics – multipulse methods for clean Power,” IEEE PRESS, New York, (1995).
[13] F.Z.Peng, J.S.Lai, J.W.McKeever and J.A.Vancoevering, “Multilevel voltage source inverter with separate dc sources for static var
generation”, IEEE Transactions on Industrial Applications, vol.32, no.5, 1996, pp.1130-1138.
[14] J. I. Leon, S. Vazquez, S. Kouro, L. G. Franquelo, J. M. Carrasco, and, J. Rodriguez, “Unidimensional modulation technique for
cascaded multilevel converters,” IEEE Trans. Ind. Electron., vol. 56, no. 8, pp. 2981– 2986, Aug. 2009.
[15] P. Cortes, A. Wilson, S. Kouro, J. Rodriguez, and H. Abu-Rub, “Model predictive control of multilevel cascaded H-bridge
inverters,” IEEE Trans. Ind. Electron., vol. 57, no. 8, pp. 2691–2699, Aug. 2010.
[16]. P. Lezana, J. Rodriguez, and D. A. Oyarzun, “Cascaded multilevel inverter with regeneration capability and reduced number of
switches,” IEEE Trans. Ind. Electron., vol. 55, no. 3, pp. 1059– 1066, Mar. 2008.
[17] K.A. Corzine, F.A. Hardrick, Y.L. Familiant, “A cascaded multi-level H-bridge inverter utilizing capacitor voltages sources”, in
Proc. IASTAD Power Electron. Technol. and Appl. Conf., 2003.
[18] G.A. Duba, E.S. Thaxton, J. Walter, “Modular static power converter connected in a multi-level, multi-phase, multi-circuit
configuration”, U.S. Pat. 05933339, 1999.
[19] E.Babaei, “A cascade multilevel converter topology with reduced number of switches”, IEEE Trans. Power Electron., Vol. 23, pp.
2657-2664, 2008.
[20] E. Babaei, “Optimal topologies for cascaded sub-multilevel converters”, J. Of Power Electron, Vol. 10, pp. 251-261, 2010.