Pub Date : 2021-02-02DOI: 10.1109/PEDSTC52094.2021.9405929
Y. Neyshabouri, M. Farhadi‐Kangarlu
This research deals with the low-voltage ride-through (LVRT) in a distribution grid STATCOM (DSTATCOM) based on nested neutral point clamped (NNPC) inverter. A NNPC-DSTATCOM with a LVRT control scheme is introduced through which positive-sequence (PS) and negative-sequence (NS) reactive currents are handled. NNPC based DSTATCOM contains two kinds of capacitors, i.e., dc-bus capacitor(s) and flying capacitors (FLCs) placed in the legs. Since in DSTATCOM, the dc-bus is not fed by a dc supply, a hierarchical balancing strategy is presented to stabilize the voltages of capacitors. In this strategy, first, the common dc-bus voltage is stabilized at the desired reference and then the voltages of FLCs are adjusted. NNPC-DSTATCOM has a single dc source and circulating current paths through the converter legs. Taking this advantage, the LVRT scheme is able to independently manage both PS and NC reactive currents when an unbalanced grid condition appears while maintaining the capacitors voltages balanced. Simulation results are extracted in MATLAB/SIMULINK environment proving the correspondent operation of the introduced system.
{"title":"Nested Neutral Point Clamped Converter Based DSTATCOM with Mixed-Sequence Reactive Current Compensation Capability","authors":"Y. Neyshabouri, M. Farhadi‐Kangarlu","doi":"10.1109/PEDSTC52094.2021.9405929","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405929","url":null,"abstract":"This research deals with the low-voltage ride-through (LVRT) in a distribution grid STATCOM (DSTATCOM) based on nested neutral point clamped (NNPC) inverter. A NNPC-DSTATCOM with a LVRT control scheme is introduced through which positive-sequence (PS) and negative-sequence (NS) reactive currents are handled. NNPC based DSTATCOM contains two kinds of capacitors, i.e., dc-bus capacitor(s) and flying capacitors (FLCs) placed in the legs. Since in DSTATCOM, the dc-bus is not fed by a dc supply, a hierarchical balancing strategy is presented to stabilize the voltages of capacitors. In this strategy, first, the common dc-bus voltage is stabilized at the desired reference and then the voltages of FLCs are adjusted. NNPC-DSTATCOM has a single dc source and circulating current paths through the converter legs. Taking this advantage, the LVRT scheme is able to independently manage both PS and NC reactive currents when an unbalanced grid condition appears while maintaining the capacitors voltages balanced. Simulation results are extracted in MATLAB/SIMULINK environment proving the correspondent operation of the introduced system.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"61 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":"124712674","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/PEDSTC52094.2021.9405967
H. Givi, E. Hosseini, E. Farjah
This research is focused on estimation of the batteries voltages and resistances in a modular multilevel converter (MMC) with half-bridge topology using particle swarm optimization (PSO). This estimation can be helpful to reduce the cost of MMCs by removing the voltage sensors required for the modules. In this paper, the concept of PSO is introduced, modified, and applied for estimation of the batteries voltages and resistances in the MMC modules. Half-bridge modules are considered in this investigation for the MMC. Different settings of PSO have been considered and the simulation results show that such estimation can be effectively realized by the modified PSO algorithm.
{"title":"Estimation of Batteries Voltages and Resistances in Modular Multilevel Converter With Half-Bridge Modules Using Modified PSO Algorithm","authors":"H. Givi, E. Hosseini, E. Farjah","doi":"10.1109/PEDSTC52094.2021.9405967","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405967","url":null,"abstract":"This research is focused on estimation of the batteries voltages and resistances in a modular multilevel converter (MMC) with half-bridge topology using particle swarm optimization (PSO). This estimation can be helpful to reduce the cost of MMCs by removing the voltage sensors required for the modules. In this paper, the concept of PSO is introduced, modified, and applied for estimation of the batteries voltages and resistances in the MMC modules. Half-bridge modules are considered in this investigation for the MMC. Different settings of PSO have been considered and the simulation results show that such estimation can be effectively realized by the modified PSO algorithm.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"126 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":"124052293","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/PEDSTC52094.2021.9405823
M. Mousavi, S. Alireza Davari, V. Nekoukar, C. Garcia, José R. Rodríguez
The emerging theory of model-free control (MFC) has presented an ultra-local modeling approach for systems, which is independent of the system parameters. This paper proposes a model-free based predictive voltage control for the induction motor (IM) drive. In this method, replacing the classic mathematical model of IM with an ultra-local model provides a good possibility of achieving a robust predictive control. Generally, MFC requires an online identification technique to design the parameters of the ultra-local model. In this paper, to avoid the complex designing procedure of MFC, a linear extended state observer (LESO) is utilized to construct the ultra-local model of IM. Moreover, the proposed scheme is implemented in finite-set predictive voltage control, which doesn’t require a modulation technique. The evaluation of the proposed method is made through the simulation.
{"title":"Model-Free Finite Set Predictive Voltage Control of Induction Motor","authors":"M. Mousavi, S. Alireza Davari, V. Nekoukar, C. Garcia, José R. Rodríguez","doi":"10.1109/PEDSTC52094.2021.9405823","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405823","url":null,"abstract":"The emerging theory of model-free control (MFC) has presented an ultra-local modeling approach for systems, which is independent of the system parameters. This paper proposes a model-free based predictive voltage control for the induction motor (IM) drive. In this method, replacing the classic mathematical model of IM with an ultra-local model provides a good possibility of achieving a robust predictive control. Generally, MFC requires an online identification technique to design the parameters of the ultra-local model. In this paper, to avoid the complex designing procedure of MFC, a linear extended state observer (LESO) is utilized to construct the ultra-local model of IM. Moreover, the proposed scheme is implemented in finite-set predictive voltage control, which doesn’t require a modulation technique. The evaluation of the proposed method is made through the simulation.","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":"122349179","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/PEDSTC52094.2021.9405863
Alireza Jabbarnejad, S. Vaez‐Zadeh
This paper proposes a model-free predictive combined control for three-phase grid-connected voltage source converters. It controls current components in the grid virtual flux reference frame according to the combined control method, along with the current prediction based on the predictive control method. The method has an inherent rapid dynamic response and high power quality with low sampling frequency. It avoids using any system parameters in the control structure, leading to a proper performance even with no information of system parameters. The method is simple and has a low computation burden, and lacks any pulse-width modulation (PWM) sub-system, additional sensor, and lookup table. The method is evaluated through simulation studies, where the results represent the effectiveness of the proposed method and its superiority over conventional method under parameter mismatch conditions.
{"title":"Model-Free Predictive Combined Control for Three-Phase Grid-Connected Voltage Source Converters","authors":"Alireza Jabbarnejad, S. Vaez‐Zadeh","doi":"10.1109/PEDSTC52094.2021.9405863","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405863","url":null,"abstract":"This paper proposes a model-free predictive combined control for three-phase grid-connected voltage source converters. It controls current components in the grid virtual flux reference frame according to the combined control method, along with the current prediction based on the predictive control method. The method has an inherent rapid dynamic response and high power quality with low sampling frequency. It avoids using any system parameters in the control structure, leading to a proper performance even with no information of system parameters. The method is simple and has a low computation burden, and lacks any pulse-width modulation (PWM) sub-system, additional sensor, and lookup table. The method is evaluated through simulation studies, where the results represent the effectiveness of the proposed method and its superiority over conventional method under parameter mismatch conditions.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"37 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":"128223668","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/PEDSTC52094.2021.9405895
H. J. Kaleybar, M. Brenna, F. Foiadelli
In recent years, due to the limitations and disadvantages of conventional DC and AC railway power supply systems (RPSS) the idea of reinforcing and replacing these systems with a more advanced and developed MVDC based system has become more prominent. The high power capability of these alternative systems together with convenient integration of distributed energy resources are the outstanding features which highlight their potential. In this paper, the adaptability of current Italian high-speed RPSS including 3 kV DC and 2×25 kV AC with new MVDC RPSS in terms of the configuration of traction power substations (TPSS), OCS structures, voltage drops, and rolling stocks has been addressed and interface power electronic-based converters are suggested.
{"title":"Compatibility of Present 3 kV DC and 2×25 kV AC High-Speed Railway Power Supply Systems Towards Future MVDC System","authors":"H. J. Kaleybar, M. Brenna, F. Foiadelli","doi":"10.1109/PEDSTC52094.2021.9405895","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405895","url":null,"abstract":"In recent years, due to the limitations and disadvantages of conventional DC and AC railway power supply systems (RPSS) the idea of reinforcing and replacing these systems with a more advanced and developed MVDC based system has become more prominent. The high power capability of these alternative systems together with convenient integration of distributed energy resources are the outstanding features which highlight their potential. In this paper, the adaptability of current Italian high-speed RPSS including 3 kV DC and 2×25 kV AC with new MVDC RPSS in terms of the configuration of traction power substations (TPSS), OCS structures, voltage drops, and rolling stocks has been addressed and interface power electronic-based converters are suggested.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"7 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":"129361687","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/PEDSTC52094.2021.9405959
Naser Vosoughi Kurdkandi, Milad Ghavipanjeh Marangalu, T. Hemmati, S. Hosseini, O. Husev, Arash Khsokhbar-sadigh
This paper introduces a single dc source five-level grid-tied photovoltaic (PV) inverter. In the proposed topology generates a five-level output voltage waveform using only one input dc source. It causes reduction in the overall size and cost. In addition, the dc-dc buck-boost converter is applied to regulate the voltage of the utilized capacitor around it’s reference value. The adjusted capacitor voltage leads to high quality output voltage and current. The output five-level voltage is favorable in high voltage applications and it generates lower total harmonic distortion (THD) in comparison with three-level inverters. In addition to these advantages, the presented topology is capable of providing reactive power supporting which is essential according to grid regulations. Peak current control (PCC) method is used to control both active and reactive powers. Also, in the in order to generate the switching gate pulses of the introduced inverter the PCC strategy is applied. In addition, a completely controlled sinusoidal current can be pumped to the power grid. In order to highlight the advantages of the proposed system, the proposed inverter is compared with other topologies. The effectiveness of the introduced configuration is validated by MATLAB/Simulink when, the proposed topology is connected to the power grid. Finally, the paper is concluded.
{"title":"Single-Phase Two-Stage Transformerless Grid-Connected Inverter For Photovoltaic Applications","authors":"Naser Vosoughi Kurdkandi, Milad Ghavipanjeh Marangalu, T. Hemmati, S. Hosseini, O. Husev, Arash Khsokhbar-sadigh","doi":"10.1109/PEDSTC52094.2021.9405959","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405959","url":null,"abstract":"This paper introduces a single dc source five-level grid-tied photovoltaic (PV) inverter. In the proposed topology generates a five-level output voltage waveform using only one input dc source. It causes reduction in the overall size and cost. In addition, the dc-dc buck-boost converter is applied to regulate the voltage of the utilized capacitor around it’s reference value. The adjusted capacitor voltage leads to high quality output voltage and current. The output five-level voltage is favorable in high voltage applications and it generates lower total harmonic distortion (THD) in comparison with three-level inverters. In addition to these advantages, the presented topology is capable of providing reactive power supporting which is essential according to grid regulations. Peak current control (PCC) method is used to control both active and reactive powers. Also, in the in order to generate the switching gate pulses of the introduced inverter the PCC strategy is applied. In addition, a completely controlled sinusoidal current can be pumped to the power grid. In order to highlight the advantages of the proposed system, the proposed inverter is compared with other topologies. The effectiveness of the introduced configuration is validated by MATLAB/Simulink when, the proposed topology is connected to the power grid. Finally, the paper is concluded.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"105 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":"114819675","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/PEDSTC52094.2021.9405870
M. Ebadpour
In this study, a multiport isolated DC-DC converter is proposed for charging of plug-in electric vehicles, which can interface among the photovoltaic (PV) systems, vehicle batteries, and power grid. The proposed converter is dual-output, and vehicle batteries can charge from both PV systems and grid simultaneously or separately. Moreover, the converter is bidirectional, capable of delivering power from vehicle batteries to grid by using the half-bridge CLLLC resonant topology with less switching devices. Furthermore, a unified multi-input multi-output (MIMO) controller is used for control of converter. The main topology, operating scenarios, and control system of converter are presented. To validate the performance of the converter, the system is simulated by MATLAB/Simulink software and results are illustrated to prove the controller accuracy during different operation modes.
{"title":"A Multiport Isolated DC-DC Converter for Plug-in Electric Vehicles Based on Combination of Photovoltaic Systems and Power Grid","authors":"M. Ebadpour","doi":"10.1109/PEDSTC52094.2021.9405870","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405870","url":null,"abstract":"In this study, a multiport isolated DC-DC converter is proposed for charging of plug-in electric vehicles, which can interface among the photovoltaic (PV) systems, vehicle batteries, and power grid. The proposed converter is dual-output, and vehicle batteries can charge from both PV systems and grid simultaneously or separately. Moreover, the converter is bidirectional, capable of delivering power from vehicle batteries to grid by using the half-bridge CLLLC resonant topology with less switching devices. Furthermore, a unified multi-input multi-output (MIMO) controller is used for control of converter. The main topology, operating scenarios, and control system of converter are presented. To validate the performance of the converter, the system is simulated by MATLAB/Simulink software and results are illustrated to prove the controller accuracy during different operation modes.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"272 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":"115113662","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/PEDSTC52094.2021.9405847
F. Naseri, E. Schaltz, Daniel-Ion Stroe, Alejandro Gismero, E. Farjah, Sepehr Karimi
Lithium-ion (Li) battery based on nickel-manganese-cobalt (NMC) cathode has emerged as one of the most successful battery types for powertrain of Electric Vehicles (EVs). The effective management of the NMC-based battery relies on accurate estimation of its State-of-Charge (SoC) in the Battery Management System (BMS). In this paper, an effective system identification approach is applied to establish the battery model using a Continuous Transfer Function (CTF) model. The Akaike information criterion (AIC) is applied to obtain the suitable model structure considering the accuracy and real-time efficiency of the model. Then, the SoC Estimation is fulfilled based on the developed model and the Extended Kalman Filter (EKF) algorithm. The correct performance of the proposed method is evaluated and confirmed using experimental data of 3.4 Ah 3.7 V NMC-based battery cells. Likewise, the feasibility of embedded implementation is proven through some Hardware-in-the-Loop (HiL) tests.
基于镍锰钴(NMC)阴极的锂离子电池已成为电动汽车动力系统中最成功的电池类型之一。电池管理系统(battery management System, BMS)对电池荷电状态(State-of-Charge, SoC)的准确估计是对nmc电池进行有效管理的关键。本文采用一种有效的系统辨识方法，利用连续传递函数(CTF)模型建立电池模型。考虑到模型的准确性和实时性，应用赤池信息准则(Akaike information criterion, AIC)获得合适的模型结构。然后，基于所建立的模型和扩展卡尔曼滤波(EKF)算法实现了系统的SoC估计。利用3.4 Ah 3.7 V nmc基电池的实验数据，对该方法的正确性进行了评价和验证。同样，通过一些硬件在环(HiL)测试证明了嵌入式实现的可行性。
{"title":"State-of-Charge Estimation of NMC-based Li-ion Battery Based on Continuous Transfer Function Model and Extended Kalman Filter","authors":"F. Naseri, E. Schaltz, Daniel-Ion Stroe, Alejandro Gismero, E. Farjah, Sepehr Karimi","doi":"10.1109/PEDSTC52094.2021.9405847","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405847","url":null,"abstract":"Lithium-ion (Li) battery based on nickel-manganese-cobalt (NMC) cathode has emerged as one of the most successful battery types for powertrain of Electric Vehicles (EVs). The effective management of the NMC-based battery relies on accurate estimation of its State-of-Charge (SoC) in the Battery Management System (BMS). In this paper, an effective system identification approach is applied to establish the battery model using a Continuous Transfer Function (CTF) model. The Akaike information criterion (AIC) is applied to obtain the suitable model structure considering the accuracy and real-time efficiency of the model. Then, the SoC Estimation is fulfilled based on the developed model and the Extended Kalman Filter (EKF) algorithm. The correct performance of the proposed method is evaluated and confirmed using experimental data of 3.4 Ah 3.7 V NMC-based battery cells. Likewise, the feasibility of embedded implementation is proven through some Hardware-in-the-Loop (HiL) tests.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"15 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":"115819922","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/PEDSTC52094.2021.9405867
Navid Zare Kashani, Moein Aldin Parazdeh, M. Eldoromi, A. M. Birjandi, P. Amiri
With increasing interest in renewable energy sources and technologies, widespread penetration of Electric Vehicle (EV) into the power grid and use of distributed energy resources (DERs) is anticipated in the near future. Vehicle-to-Grid (V2G) is a convenient technology that allows EVs to act as distributed sources, that can store or release energy at suitable times, and in the result of a bidirectional power flow between the AC mains and DC EV batteries. This bidirectional power flow is achieved using bidirectional power electronics converters that places between the Grid and the EV battery. The Phase Locked Loop (PLL) is one of the most important parts in controlling the EV charger. It provides synchronization to the grid to efficiently control the grid current and switching sequence. Different PLL technologies are presented in the literature. Meanwhile, second-order generalized integration (SOGI) methods have a stable state and satisfactory dynamic performance. In this paper, application of the SOGI method in bidirectional EV Charger is investigated. The paper exploits the adjustments of the SOGI structure and the effect of parameters on the system dynamics. The performance of grid-connected power converters extremely depends on the synchronization strategy. Single-phase PLL with a SOGI as quadrature signal generation subsystem provide proper grid synchronization in the case of harmonically distorted grid voltage. The simulation results based on MATLAB/Simulink are provided to verify the stability of the system. Also, experimental results are carried out to validate the numerical analysis and simulation results.
{"title":"Grid Synchronization of Bidirectional Electric Vehicle Chargers Using Second Order Generalized Integrator based Phase Lock Loop","authors":"Navid Zare Kashani, Moein Aldin Parazdeh, M. Eldoromi, A. M. Birjandi, P. Amiri","doi":"10.1109/PEDSTC52094.2021.9405867","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405867","url":null,"abstract":"With increasing interest in renewable energy sources and technologies, widespread penetration of Electric Vehicle (EV) into the power grid and use of distributed energy resources (DERs) is anticipated in the near future. Vehicle-to-Grid (V2G) is a convenient technology that allows EVs to act as distributed sources, that can store or release energy at suitable times, and in the result of a bidirectional power flow between the AC mains and DC EV batteries. This bidirectional power flow is achieved using bidirectional power electronics converters that places between the Grid and the EV battery. The Phase Locked Loop (PLL) is one of the most important parts in controlling the EV charger. It provides synchronization to the grid to efficiently control the grid current and switching sequence. Different PLL technologies are presented in the literature. Meanwhile, second-order generalized integration (SOGI) methods have a stable state and satisfactory dynamic performance. In this paper, application of the SOGI method in bidirectional EV Charger is investigated. The paper exploits the adjustments of the SOGI structure and the effect of parameters on the system dynamics. The performance of grid-connected power converters extremely depends on the synchronization strategy. Single-phase PLL with a SOGI as quadrature signal generation subsystem provide proper grid synchronization in the case of harmonically distorted grid voltage. The simulation results based on MATLAB/Simulink are provided to verify the stability of the system. Also, experimental results are carried out to validate the numerical analysis and simulation results.","PeriodicalId":351532,"journal":{"name":"2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)","volume":"41 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":"130878477","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/PEDSTC52094.2021.9405861
Amirhosein Gohari, A. Hekmati, Ali Mosallanejadand, H. Torkaman, E. Afjei
In this paper, a comparative analysis is made between cylindrical and conventional 1-phase transformer for low-power power application. In the cylindrical structure, windings are placed in the core, composed of two circular shells with different thicknesses connected to each other with two plates one of which has a hole. Two configurations for cylindrical transformer are discussed. In the first configuration, HV is wounded on LV, and in the second configuration, a gap is placed between LV and HV. Electromagnetic and thermal analysis of cylindrical transformers in transient and steady-state conditions is performed with the finite element method (FEM). The obtained results are compared with the conventional model. In the cylindrical structure, the leakage flux between high-voltage and low-voltage windings has decreased compared to the conventional model. Besides, the magnitude of inrush current, core loss, and core volume are considerably reduced. Thermal analysis shows better heat dissipation in the cylindrical transformer that leads to lower hot spot temperature in this model. Furthermore, because the core surrounds the windings, the windings’ protection is provided by the core, and there is no need for the external shell.
{"title":"Design and Comparative Finite Element And Thermal Analysis of 1-Phase Cylindrical Transformer for Low-Power Applications","authors":"Amirhosein Gohari, A. Hekmati, Ali Mosallanejadand, H. Torkaman, E. Afjei","doi":"10.1109/PEDSTC52094.2021.9405861","DOIUrl":"https://doi.org/10.1109/PEDSTC52094.2021.9405861","url":null,"abstract":"In this paper, a comparative analysis is made between cylindrical and conventional 1-phase transformer for low-power power application. In the cylindrical structure, windings are placed in the core, composed of two circular shells with different thicknesses connected to each other with two plates one of which has a hole. Two configurations for cylindrical transformer are discussed. In the first configuration, HV is wounded on LV, and in the second configuration, a gap is placed between LV and HV. Electromagnetic and thermal analysis of cylindrical transformers in transient and steady-state conditions is performed with the finite element method (FEM). The obtained results are compared with the conventional model. In the cylindrical structure, the leakage flux between high-voltage and low-voltage windings has decreased compared to the conventional model. Besides, the magnitude of inrush current, core loss, and core volume are considerably reduced. Thermal analysis shows better heat dissipation in the cylindrical transformer that leads to lower hot spot temperature in this model. Furthermore, because the core surrounds the windings, the windings’ protection is provided by the core, and there is no need for the external shell.","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":"132156425","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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