Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405903
A. Mousaei, M. B. Bannae Sharifian, N. Rostami
Linear Induction Motors (LIMs) are used in somewhere that require linear motion. There are many control methods for speed control of LIMs. One of them is Direct Thrust Force Control (DTFC). DTFC method has disadvantages like ripple of output speed. In this paper, to solve this problem, have been used a controller that called Super Twisting Sliding Mode (STSM). We have combined STSM controller with DTFC structure for speed control of LIM. The STSM controller has been used in all DTFC components such as speed, flux and torque. Also we have used a two-level three-phase converter that was switched by space vector modulation (SVM). The stability of the proposed system has been investigated by Lyapunov’s theory. The performance of the proposed control structure has been simulated by MATLAB/Simulink software. Also we have used Particle Swarm Optimization (PSO) algorithm for design and optimization LIM. According to the results ripple of speed in proposed method is less than DTFC. Also proposed method had faster response speed than DTFC.
{"title":"Direct Thrust Force Control (DTFC) of Optimized Linear Induction Motor with Super Twisting Sliding Mode Controller (STSMC)","authors":"A. Mousaei, M. B. Bannae Sharifian, N. Rostami","doi":"10.1109/PEDSTC52094.2021.9405903","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405903","url":null,"abstract":"Linear Induction Motors (LIMs) are used in somewhere that require linear motion. There are many control methods for speed control of LIMs. One of them is Direct Thrust Force Control (DTFC). DTFC method has disadvantages like ripple of output speed. In this paper, to solve this problem, have been used a controller that called Super Twisting Sliding Mode (STSM). We have combined STSM controller with DTFC structure for speed control of LIM. The STSM controller has been used in all DTFC components such as speed, flux and torque. Also we have used a two-level three-phase converter that was switched by space vector modulation (SVM). The stability of the proposed system has been investigated by Lyapunov’s theory. The performance of the proposed control structure has been simulated by MATLAB/Simulink software. Also we have used Particle Swarm Optimization (PSO) algorithm for design and optimization LIM. According to the results ripple of speed in proposed method is less than DTFC. Also proposed method had faster response speed than DTFC.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122317942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405883
Mohsen Taghizadeh Kejani, Seyed Hossein Aleyasin, Amir Safaeinasab, K. Abbaszadeh
In this paper a high step-up n level DC/DC converter has been proposed with high voltage gain and only one power switch. In this n-level topology, inductors are connected to the input in parallel and in the output they are placed in series path. The voltage gain in this proposed converter is higher than the conventional boost converter and other conventional step-up DC/DC converters. A high duty cycle is not needed to reach high gain and the source's voltage is not necessarily high in this converter. Because of the output voltage level is low in renewable energy power plants, this proposed topology can be used to boost their voltages. This presented converter has been analyzed in different operational modes comprehensively and after that it has been simulated with two different states of inductor cells. All of the simulation results of this proposed converter have been simulated via MATLABSIMULINK simulation software.
本文提出的 n 级 DC/DC 转换器具有高电压增益，且只有一个电源开关。在这种 n 级拓扑结构中，电感器并联连接到输入端，而在输出端则串联连接。这种转换器的电压增益高于传统的升压转换器和其他传统的升压 DC/DC 转换器。在这种转换器中，不需要高占空比来达到高增益，源电压也不一定很高。由于可再生能源发电厂的输出电压水平较低，因此可以使用这种拓扑结构来提升它们的电压。我们在不同的工作模式下对该转换器进行了全面分析，并在两种不同的电感单元状态下对其进行了仿真。该转换器的所有仿真结果均通过 MATLABSIMULINK 仿真软件进行了仿真。
{"title":"A New Non-Isolated Single Switch High Step-up DC/DC Converter Based on Inductor Cells","authors":"Mohsen Taghizadeh Kejani, Seyed Hossein Aleyasin, Amir Safaeinasab, K. Abbaszadeh","doi":"10.1109/PEDSTC52094.2021.9405883","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405883","url":null,"abstract":"In this paper a high step-up n level DC/DC converter has been proposed with high voltage gain and only one power switch. In this n-level topology, inductors are connected to the input in parallel and in the output they are placed in series path. The voltage gain in this proposed converter is higher than the conventional boost converter and other conventional step-up DC/DC converters. A high duty cycle is not needed to reach high gain and the source's voltage is not necessarily high in this converter. Because of the output voltage level is low in renewable energy power plants, this proposed topology can be used to boost their voltages. This presented converter has been analyzed in different operational modes comprehensively and after that it has been simulated with two different states of inductor cells. All of the simulation results of this proposed converter have been simulated via MATLABSIMULINK simulation software.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125764826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405877
M. Hajilou, S. Khalili, H. Farzanehfard
In this paper, a single switch transformerless resonant high step-up non-isolated DC-DC converter is proposed. In this converter, soft-switching condition is provided for all semiconductor elements without any axillary switch. Due to high voltage gain and soft-switching of all semiconductor elements without using any axillary switch or coupled inductors, the proposed converter has a simple structure, low volume, weight and cost. In addition, there is a common ground between the input, output and the main switch, which simplifies the control. In this paper, the presented converter operational principle and steady-state analysis are discussed in details. To confirm the performed analysis, a 100-watt prototype is implemented in the laboratory.
{"title":"Single Switch ZVS Transformerless Resonant High Step-up Converter","authors":"M. Hajilou, S. Khalili, H. Farzanehfard","doi":"10.1109/PEDSTC52094.2021.9405877","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405877","url":null,"abstract":"In this paper, a single switch transformerless resonant high step-up non-isolated DC-DC converter is proposed. In this converter, soft-switching condition is provided for all semiconductor elements without any axillary switch. Due to high voltage gain and soft-switching of all semiconductor elements without using any axillary switch or coupled inductors, the proposed converter has a simple structure, low volume, weight and cost. In addition, there is a common ground between the input, output and the main switch, which simplifies the control. In this paper, the presented converter operational principle and steady-state analysis are discussed in details. To confirm the performed analysis, a 100-watt prototype is implemented in the laboratory.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130445660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405926
A. Mohammadzadeh, Amir Aminzadeh Ghavifekr
In this paper a type-2 (T2) fuzzy logic system (FLS) based controller is presented for power/voltage control of PV/batery/Fuel system. The switching mechanism of the converters are adjusted by the use of FLS based controllers. The rules of T2-FLSs are tuned on basis of Lyapunov approach. The tuning rules are determined such that the stability to be ensured and also the regulation to be obtained. Simulations verify that the deigned controllers result in a desired regulation in versus of fully unknown dynamics of PV and all other units and also the obtained control signals have a desired implementable shape.
{"title":"Converter switching mechanism scheduling by type-2 fuzzy approach for PV/battery/Fuel systems","authors":"A. Mohammadzadeh, Amir Aminzadeh Ghavifekr","doi":"10.1109/PEDSTC52094.2021.9405926","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405926","url":null,"abstract":"In this paper a type-2 (T2) fuzzy logic system (FLS) based controller is presented for power/voltage control of PV/batery/Fuel system. The switching mechanism of the converters are adjusted by the use of FLS based controllers. The rules of T2-FLSs are tuned on basis of Lyapunov approach. The tuning rules are determined such that the stability to be ensured and also the regulation to be obtained. Simulations verify that the deigned controllers result in a desired regulation in versus of fully unknown dynamics of PV and all other units and also the obtained control signals have a desired implementable shape.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126261961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405885
M. Gholipour, S. Farhangi, M. Saradarzadeh, E. Asadi
In recent years, inductive Wireless Power Transfer (WPT) chargers have become popular because of their advantages such as high safety, user convenience and easier access to onboard vehicle charger. However, in the conventional wireless chargers there are still contained problems such as long charging time and reduced lithium-ion battery life cycle. In this paper with implementation of Burp Pulse Charging method in the wireless power transfer system, improvement in battery charging efficiency, charging time and battery state of health are achieved. These benefits are due to the presence of rest periods in the Burp charge profile in comparison to traditional Constant Current (CC) and Constant Voltage (CV) methods. Also with the proposed soft start and stop algorithms, transient response of resonant converter in Burp pulse charging improves. The simulation results confirm the possibility of implementing Burp pulse charging in WPT system in the absence of a wireless communication link.
{"title":"Implementation of Burp Pulse Charging in Inductive Power Transfer Systems with LCC-Series Compensating Topology for Electric Vehicle Charger Application","authors":"M. Gholipour, S. Farhangi, M. Saradarzadeh, E. Asadi","doi":"10.1109/PEDSTC52094.2021.9405885","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405885","url":null,"abstract":"In recent years, inductive Wireless Power Transfer (WPT) chargers have become popular because of their advantages such as high safety, user convenience and easier access to onboard vehicle charger. However, in the conventional wireless chargers there are still contained problems such as long charging time and reduced lithium-ion battery life cycle. In this paper with implementation of Burp Pulse Charging method in the wireless power transfer system, improvement in battery charging efficiency, charging time and battery state of health are achieved. These benefits are due to the presence of rest periods in the Burp charge profile in comparison to traditional Constant Current (CC) and Constant Voltage (CV) methods. Also with the proposed soft start and stop algorithms, transient response of resonant converter in Burp pulse charging improves. The simulation results confirm the possibility of implementing Burp pulse charging in WPT system in the absence of a wireless communication link.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127888296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405956
M. Khosravi, D. Khaburi, Meysam Yousefzadeh, José R. Rodríguez
The Model Predictive Control (MPC) has attracted much attention for controlling power electronic topologies, such as Modular Multilevel Converters (MMC). Despite numerous advantages of MMC, several control objectives, i.e. circulating and output currents control, and also the cell capacitors’ voltage balancing should be realized. Although implementing several control objectives with a single cost function is an inherent feature of the MPC scheme, choosing appropriate weighting factor values is an important issue, besides the well-known high computational load problem. In this paper, a technique is proposed for adjusting the weighting factor value, in a way that the output current THD and also the circulating current RMS values are simultaneously minimized. This is done by designing a simple look-up table and also using sgn functions, in order to auto-update the weighting factor value during the converter operation. Finally, the performance of the proposed method is validated through conducting some simulations in the MATLAB/Simulink environment.
{"title":"Performance Improvement of Model Predictive Control for Modular Multilevel Converters by Auto-regulating the Weighting Factor Value","authors":"M. Khosravi, D. Khaburi, Meysam Yousefzadeh, José R. Rodríguez","doi":"10.1109/PEDSTC52094.2021.9405956","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405956","url":null,"abstract":"The Model Predictive Control (MPC) has attracted much attention for controlling power electronic topologies, such as Modular Multilevel Converters (MMC). Despite numerous advantages of MMC, several control objectives, i.e. circulating and output currents control, and also the cell capacitors’ voltage balancing should be realized. Although implementing several control objectives with a single cost function is an inherent feature of the MPC scheme, choosing appropriate weighting factor values is an important issue, besides the well-known high computational load problem. In this paper, a technique is proposed for adjusting the weighting factor value, in a way that the output current THD and also the circulating current RMS values are simultaneously minimized. This is done by designing a simple look-up table and also using sgn functions, in order to auto-update the weighting factor value during the converter operation. Finally, the performance of the proposed method is validated through conducting some simulations in the MATLAB/Simulink environment.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"260 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123964343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405913
Pouria Sarvghadi, A. Y. Varjani
A new topology of the high step-up non-isolated DC-DC converter is illustrated in this paper. This topology adopts a modified voltage multiplier cell using coupling inductor. The high voltage gain of the proposed converter was achieved by minimum turn ratio and middle duty cycle. By low turn ratio, leakage inductance is low hence, stress of the active switch is reduced. Therefore, the conduction loss was reduced and the efficiency of converter increased. Another benefits of the proposed converter are low number of elements and continuous input current. By continuous input current, this converter can be used in renewable energy applications. Steady state analysis and all of the design procedure, investigated in this paper. Finally, operation of the proposed converter evaluated with simulation in PLECS software. The output power and voltage gain were selected 300w and 13.75, respectively.
{"title":"A New Topology of High Step-Up Non-Isolated DC-DC Converter with Modifying in VMC Network","authors":"Pouria Sarvghadi, A. Y. Varjani","doi":"10.1109/PEDSTC52094.2021.9405913","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405913","url":null,"abstract":"A new topology of the high step-up non-isolated DC-DC converter is illustrated in this paper. This topology adopts a modified voltage multiplier cell using coupling inductor. The high voltage gain of the proposed converter was achieved by minimum turn ratio and middle duty cycle. By low turn ratio, leakage inductance is low hence, stress of the active switch is reduced. Therefore, the conduction loss was reduced and the efficiency of converter increased. Another benefits of the proposed converter are low number of elements and continuous input current. By continuous input current, this converter can be used in renewable energy applications. Steady state analysis and all of the design procedure, investigated in this paper. Finally, operation of the proposed converter evaluated with simulation in PLECS software. The output power and voltage gain were selected 300w and 13.75, respectively.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123182154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405908
Reyhaneh Eskandari, Hadi Tarzamni, M. Sabahi, H. Jahan, Shamim Mohammadsalehian, F. Blaabjerg
A high step-up converter including one active switch is presented in the present work. The introduced structure is a combination of Quadratic boost converter and Zeta converter; therefore, it features low input and output current ripples. The energy of leakage inductor is inherently recovered and the voltage spike on switch is perfectly mitigated. The voltage across diodes and switch is quite lower than the boosted output voltage which can be a prominent issue in high step-up converters. This can lead to employ switches and diodes with low conduction losses causing overall efficiency to increase. The converter function in CCM and DCM are analyzed, and the voltage conversion ratio along with voltage stresses of the components are worked out. Moreover, the simulation results via PSCAD/EMTDC is presented to further verify the theoretical analysis.
{"title":"A Single-Switch Quadratic Boost with Stacked Zeta Converter","authors":"Reyhaneh Eskandari, Hadi Tarzamni, M. Sabahi, H. Jahan, Shamim Mohammadsalehian, F. Blaabjerg","doi":"10.1109/PEDSTC52094.2021.9405908","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405908","url":null,"abstract":"A high step-up converter including one active switch is presented in the present work. The introduced structure is a combination of Quadratic boost converter and Zeta converter; therefore, it features low input and output current ripples. The energy of leakage inductor is inherently recovered and the voltage spike on switch is perfectly mitigated. The voltage across diodes and switch is quite lower than the boosted output voltage which can be a prominent issue in high step-up converters. This can lead to employ switches and diodes with low conduction losses causing overall efficiency to increase. The converter function in CCM and DCM are analyzed, and the voltage conversion ratio along with voltage stresses of the components are worked out. Moreover, the simulation results via PSCAD/EMTDC is presented to further verify the theoretical analysis.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131496451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405970
R. Akbari, M. Hosseinpour
The 2/3-level hybrid inverters are a combination of three-level Neutral Point Clamped (NPC) inverter and conventional two-level inverter, which has the advantage of both two-level and three-level structures with fewer switches than the NPC inverter. In this paper, a new structure of 2/3 hybrid inverter based on dual-Z-source network is proposed. The proposed structure improves the performance of the 2/3-level inverter and increases its independent DC input voltages. The output voltage gain can be obtained by selecting the shoot-through interval appropriately in dual Z-source networks. In addition, shoot-through intervals in Z-source networks allow the inverter to run without dead time, thus increasing the output voltage quality. A modified switching method is presented for the proposed inverter, and the necessary calculations are performed. The proposed structure can be used to connect different distributed generation sources to the load separately from the grid or to the low-pressure network. The performed simulations show the accuracy of the proposed structure.
{"title":"Modeling and Simulation of Dual Z-source based Hybrid 2/3 Level Inverter","authors":"R. Akbari, M. Hosseinpour","doi":"10.1109/PEDSTC52094.2021.9405970","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405970","url":null,"abstract":"The 2/3-level hybrid inverters are a combination of three-level Neutral Point Clamped (NPC) inverter and conventional two-level inverter, which has the advantage of both two-level and three-level structures with fewer switches than the NPC inverter. In this paper, a new structure of 2/3 hybrid inverter based on dual-Z-source network is proposed. The proposed structure improves the performance of the 2/3-level inverter and increases its independent DC input voltages. The output voltage gain can be obtained by selecting the shoot-through interval appropriately in dual Z-source networks. In addition, shoot-through intervals in Z-source networks allow the inverter to run without dead time, thus increasing the output voltage quality. A modified switching method is presented for the proposed inverter, and the necessary calculations are performed. The proposed structure can be used to connect different distributed generation sources to the load separately from the grid or to the low-pressure network. The performed simulations show the accuracy of the proposed structure.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127321680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405899
M. Akbari, S. Davari, R. Ghandehari, C. Garsia, José R. Rodríguez
Removal of the transformer from quasi-Z-source inverters (q-ZSI) in photovoltaic systems creates an oscillating common-mode voltage (CMV) on the parasitic capacitors. Fluctuations in this voltage cause leakage current to flow in the system. Due to the shoot-through (ST) state in q-ZSIs, the CMV fluctuations are also higher than those of the conventional voltage source converters. In this paper, the predictive control method and the concept of virtual voltage vectors (VVVs) and their combination with the odd PWM (OPWM) method are proposed for elimination of the oscillation of the common state voltage in the q-ZSI. In the proposed method, the CMV fluctuations are kept constant for a complete switching period. In addition, the total harmonic distortion (THD) of the output current of the converter decreases, and consequently, the converter’s operating range and performance increase. By simulating a two-level q-ZSI, the performance of the proposed method are proved.
{"title":"Virtual Voltage Vector Based Predictive Control of High Performance Modified Quasi-Z-Source Inverter with the Aim of Constant Common-Mode Voltage","authors":"M. Akbari, S. Davari, R. Ghandehari, C. Garsia, José R. Rodríguez","doi":"10.1109/PEDSTC52094.2021.9405899","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405899","url":null,"abstract":"Removal of the transformer from quasi-Z-source inverters (q-ZSI) in photovoltaic systems creates an oscillating common-mode voltage (CMV) on the parasitic capacitors. Fluctuations in this voltage cause leakage current to flow in the system. Due to the shoot-through (ST) state in q-ZSIs, the CMV fluctuations are also higher than those of the conventional voltage source converters. In this paper, the predictive control method and the concept of virtual voltage vectors (VVVs) and their combination with the odd PWM (OPWM) method are proposed for elimination of the oscillation of the common state voltage in the q-ZSI. In the proposed method, the CMV fluctuations are kept constant for a complete switching period. In addition, the total harmonic distortion (THD) of the output current of the converter decreases, and consequently, the converter’s operating range and performance increase. By simulating a two-level q-ZSI, the performance of the proposed method are proved.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126882866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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