Pub Date : 2022-11-11DOI: 10.1109/APET56294.2022.10073099
Zhongren Gu, Lidan Zhou, Gang Yao, Jie Wang
Different from the large-scale high-voltage AC-DC converters required by traditional offshore wind farms, this paper proposes a low-cost non-isolated converter topology for DC collection and transmission. Input voltage is 20kV DC and onput voltage is 200kV DC. The corresponding modulation strategy and control scheme are implemented, and the distributed energy storage module is connected to smooth the input power fluctuation. Combined with the dynamic consistency algorithm, the State of Charge (SOC) equalization control strategy is designed to equalize the energy storage modules between the bridge arms. Based on Matlab/Simulink, steady-state and dynamic simulation analysis under ±50% power fluctuation of the proposed topology and control strategy is carried out, which shows fluctuation of output is reduced by 40%. Finally, an experimental platform is built to verify the rationality of the theoretical and simulation analysis.
{"title":"A HVDC Converter for Offshore Wind Power Farm Combined with Distributed Energy Storage","authors":"Zhongren Gu, Lidan Zhou, Gang Yao, Jie Wang","doi":"10.1109/APET56294.2022.10073099","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10073099","url":null,"abstract":"Different from the large-scale high-voltage AC-DC converters required by traditional offshore wind farms, this paper proposes a low-cost non-isolated converter topology for DC collection and transmission. Input voltage is 20kV DC and onput voltage is 200kV DC. The corresponding modulation strategy and control scheme are implemented, and the distributed energy storage module is connected to smooth the input power fluctuation. Combined with the dynamic consistency algorithm, the State of Charge (SOC) equalization control strategy is designed to equalize the energy storage modules between the bridge arms. Based on Matlab/Simulink, steady-state and dynamic simulation analysis under ±50% power fluctuation of the proposed topology and control strategy is carried out, which shows fluctuation of output is reduced by 40%. Finally, an experimental platform is built to verify the rationality of the theoretical and simulation analysis.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"23 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114009694","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 : 2022-11-11DOI: 10.1109/APET56294.2022.10072467
Ziqiang Wang, Jie Wang, Yao Lu, Lidan Zhou
A novel distributed finite-time secondary control is proposed for both accurate voltage/frequency restoration and power sharing of the islanded AC microgrid (MG) with droop-controlled inverter-based distributed generators (DGs). DGs in the islanded AC MG only utilize local information and their neighbor’s information to make the proposed consensus-based finite-time secondary control fully distributed. By contrasting with other finite-time secondary controls, the most highlighted contribution of this work is that the upper bound of communication delay of the islanded AC MG under the designed finite-time secondary control can be solved by the linear matrix inequality (LMI) method. Finally, the good performance of the proposed control framework against large communication delay is evaluated in the Simulink of MATLAB toolbox.
{"title":"A Distributed Finite-Time Control for Islanded AC Microgrid with Communication Delays","authors":"Ziqiang Wang, Jie Wang, Yao Lu, Lidan Zhou","doi":"10.1109/APET56294.2022.10072467","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10072467","url":null,"abstract":"A novel distributed finite-time secondary control is proposed for both accurate voltage/frequency restoration and power sharing of the islanded AC microgrid (MG) with droop-controlled inverter-based distributed generators (DGs). DGs in the islanded AC MG only utilize local information and their neighbor’s information to make the proposed consensus-based finite-time secondary control fully distributed. By contrasting with other finite-time secondary controls, the most highlighted contribution of this work is that the upper bound of communication delay of the islanded AC MG under the designed finite-time secondary control can be solved by the linear matrix inequality (LMI) method. Finally, the good performance of the proposed control framework against large communication delay is evaluated in the Simulink of MATLAB toolbox.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"256 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121332172","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}
Different types of converters have been serving as indispensable components in energy conversion process of smart grid, playing important roles in energy saving and efficiency promotion. In this paper, an observer based composite adaptive discrete-time sliding mode controller (ADSMC) is proposed for buck converter systems with mismatch disturbances. To eliminate the effects of multiple disturbances, a time-delay disturbance observer is first applied to have accurate estimations and subsequently compensated by designing an modified sliding surface. Further more, to alleviate the control input chattering and ensure shorter arrival time, a new adaptive discrete-time sliding mode reaching law is designed and applied. Religious stability and convergence analysis of the closed-loop system are presented. Finally, the effectiveness of ADSMC is verified by simulation results. As compared to the conventional discrete-time sliding mode controller, the proposed ADSMC can obtain higher voltage tracking accuracy and stronger disturbance rejection ability.
{"title":"Adaptive Sliding Mode Control for Converters in Smart Grid System with Disturbances","authors":"Liang Peng, Dong-Hai Chen, Hao Qin, Yuyin Qiu, Jian-Zi Zheng, Lin-Ning Cui, Yu-Feng Zhu, Wu Ding","doi":"10.1109/APET56294.2022.10073049","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10073049","url":null,"abstract":"Different types of converters have been serving as indispensable components in energy conversion process of smart grid, playing important roles in energy saving and efficiency promotion. In this paper, an observer based composite adaptive discrete-time sliding mode controller (ADSMC) is proposed for buck converter systems with mismatch disturbances. To eliminate the effects of multiple disturbances, a time-delay disturbance observer is first applied to have accurate estimations and subsequently compensated by designing an modified sliding surface. Further more, to alleviate the control input chattering and ensure shorter arrival time, a new adaptive discrete-time sliding mode reaching law is designed and applied. Religious stability and convergence analysis of the closed-loop system are presented. Finally, the effectiveness of ADSMC is verified by simulation results. As compared to the conventional discrete-time sliding mode controller, the proposed ADSMC can obtain higher voltage tracking accuracy and stronger disturbance rejection ability.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126075478","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 : 2022-11-11DOI: 10.1109/APET56294.2022.10073407
Lulan Zhang, Jun Jin
Affected by wind resources, wind power output has the characteristics of random, fluctuating, and reverse peaking, and there are stability problems when connected to the grid. To improve the stability of wind power systems, a high-power battery energy storage station can be introduced, which can be put into operation quickly when system disturbances occur, not only improving wind power scheduling; but also obtaining stability and economy. Introducing BESS in the double machine equivalent system, analyzing its mechanism of improving system stability from the potential energy perspective based on the equal area theory, studying the influence of capacity configuration and access location on the transient stability characteristics of wind power system, and establishing the electromechanical transient model of BESS in a user-defined manner. Finally, the simulation is verified by PSASP, and a large-scale wind farm is built in the WEPRI36 node case with different levels of disturbance conditions, and the transient stability results are compared with those of the introduced BESS, which shows that the proposed model can effectively improve the transient stability of the wind power system and has strong portability in engineering simulation applications.
{"title":"Study of PSASP-based Battery Storage Station to Improve Transient Stability of Wind Power System","authors":"Lulan Zhang, Jun Jin","doi":"10.1109/APET56294.2022.10073407","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10073407","url":null,"abstract":"Affected by wind resources, wind power output has the characteristics of random, fluctuating, and reverse peaking, and there are stability problems when connected to the grid. To improve the stability of wind power systems, a high-power battery energy storage station can be introduced, which can be put into operation quickly when system disturbances occur, not only improving wind power scheduling; but also obtaining stability and economy. Introducing BESS in the double machine equivalent system, analyzing its mechanism of improving system stability from the potential energy perspective based on the equal area theory, studying the influence of capacity configuration and access location on the transient stability characteristics of wind power system, and establishing the electromechanical transient model of BESS in a user-defined manner. Finally, the simulation is verified by PSASP, and a large-scale wind farm is built in the WEPRI36 node case with different levels of disturbance conditions, and the transient stability results are compared with those of the introduced BESS, which shows that the proposed model can effectively improve the transient stability of the wind power system and has strong portability in engineering simulation applications.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"640 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115109969","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 : 2022-11-11DOI: 10.1109/APET56294.2022.10072894
Jiawang Xiong, Hua Ye, W. Pei, L. Kong, Yujun Ding
Grid-following converter and grid-forming converter have great strategic significance in practical application or research analysis. However, the existing papers mainly analyze the system model based on the small-signal state space model. Based on the above considerations, a nonlinear dynamic model of the dual-machine system with grid-following converter and grid-forming converter is derived in this paper. This model has good theoretical value in analyzing the large disturbance stability of the system. Specifically, this paper first describes the equipment and components of the model in detail. Then, each part of the system is theoretically deduced, and finally the nonlinear dynamic equation of the system is obtained. Finally, the dynamic equations are verified by three cases. The experimental results indicate that the nonlinear dynamic equations derived in this paper can well represent the dynamic response of the system.
{"title":"Nonlinear Dynamic Model of System with Grid-following Converter and Grid-forming Converter","authors":"Jiawang Xiong, Hua Ye, W. Pei, L. Kong, Yujun Ding","doi":"10.1109/APET56294.2022.10072894","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10072894","url":null,"abstract":"Grid-following converter and grid-forming converter have great strategic significance in practical application or research analysis. However, the existing papers mainly analyze the system model based on the small-signal state space model. Based on the above considerations, a nonlinear dynamic model of the dual-machine system with grid-following converter and grid-forming converter is derived in this paper. This model has good theoretical value in analyzing the large disturbance stability of the system. Specifically, this paper first describes the equipment and components of the model in detail. Then, each part of the system is theoretically deduced, and finally the nonlinear dynamic equation of the system is obtained. Finally, the dynamic equations are verified by three cases. The experimental results indicate that the nonlinear dynamic equations derived in this paper can well represent the dynamic response of the system.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132604687","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}
The system dynamics is an effective tool to study the internal evolution mechanism of a system. In this paper, a distinct ownership interaction causal loop diagram of the distribution network is established by sorting out the relationship chain between distributed PV, distributed gas units, distributed energy storage, distribution company and residents. The distinct ownership co-evolution model of distribution network is further established, and the boundary conditions of distributed power supply construction of distribution network are obtained by analyzing the distribution network test case. The effective path to achieve the dual carbon target is verified.
{"title":"A Cooperative Development Path in Distribution Networks with Distinct Ownership Based on System Dynamics","authors":"Jianfu Ni, Feng Liang, Tianying Yu, Qing-Yu Xiong, Jinda Zhu","doi":"10.1109/APET56294.2022.10073200","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10073200","url":null,"abstract":"The system dynamics is an effective tool to study the internal evolution mechanism of a system. In this paper, a distinct ownership interaction causal loop diagram of the distribution network is established by sorting out the relationship chain between distributed PV, distributed gas units, distributed energy storage, distribution company and residents. The distinct ownership co-evolution model of distribution network is further established, and the boundary conditions of distributed power supply construction of distribution network are obtained by analyzing the distribution network test case. The effective path to achieve the dual carbon target is verified.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133476931","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}
The traditional Z-source inverter modulation strategy is usually symmetric. Symmetric modulation has a good effect in suppressing the second harmonic but also limits the possibility of modulation sequences. In this paper, an asymmetric modulation strategy is proposed, which uses the shoot-through vector only once in a switching period to maximize the optimization of the switching losses caused by the shoot-through vector. The current passing through the switching devices of the Z-source inverter is analyzed, and it is determined that the minimum number of shoot-through vectors in a switching period can achieve the lowest switching loss. On this basis, asymmetric switching sequences of several common modulation strategies are proposed. Finally, the effectiveness of the proposed modulation method is verified by Matlab/SIMULINK combined with PLECS simulation.
{"title":"Modulation Strategy of Z-source Inverter Based on Asymmetric Shoot-through Vector Insertion Method","authors":"Yizhan Jiang, Qiang Wang, Jingwei Zhang, Fengyou He, Weifeng Zhang","doi":"10.1109/APET56294.2022.10072836","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10072836","url":null,"abstract":"The traditional Z-source inverter modulation strategy is usually symmetric. Symmetric modulation has a good effect in suppressing the second harmonic but also limits the possibility of modulation sequences. In this paper, an asymmetric modulation strategy is proposed, which uses the shoot-through vector only once in a switching period to maximize the optimization of the switching losses caused by the shoot-through vector. The current passing through the switching devices of the Z-source inverter is analyzed, and it is determined that the minimum number of shoot-through vectors in a switching period can achieve the lowest switching loss. On this basis, asymmetric switching sequences of several common modulation strategies are proposed. Finally, the effectiveness of the proposed modulation method is verified by Matlab/SIMULINK combined with PLECS simulation.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132953816","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 : 2022-11-11DOI: 10.1109/APET56294.2022.10073171
Gum-Bin Yu, Wang Yao, Liu Qingsong, Xu Pan Teng, Zhu Bo, Jiao Shi
In actual operation, the air-core reactor is prone to overheating of windings or metal structures under high current operation. Usually, the design temperature rise margin of the reactor is too small, and it is easy for the reactor to overheat, resulting in burning accident. According to the actual dimensions of dry-type air-core reactor wires, insulation materials, ventilation ducts and other components, the finite element simulation graph is established, By endowing the material properties of each part of the reactor, meshing, and based on the combined calculation method of magnetic field and circuit, the reactor loss under typical working conditions is calculated. Through the joint mathematical calculation method of reactor loss and fluid-temperature field, considering the effects of reactor heat conduction, natural convection and radiation, the magnetic field and temperature distribution law of reactor body winding and upper and lower supports are obtained. Finally, the difference between the simulation value and the experimental value of the body temperature is compared, and the convection heat transfer law of the body and the axial and radial temperature distribution law of the package are revealed.
{"title":"Research on Finite Element Model of Air-core Reactor Based on Magnetic-thermal Coupling Simulation","authors":"Gum-Bin Yu, Wang Yao, Liu Qingsong, Xu Pan Teng, Zhu Bo, Jiao Shi","doi":"10.1109/APET56294.2022.10073171","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10073171","url":null,"abstract":"In actual operation, the air-core reactor is prone to overheating of windings or metal structures under high current operation. Usually, the design temperature rise margin of the reactor is too small, and it is easy for the reactor to overheat, resulting in burning accident. According to the actual dimensions of dry-type air-core reactor wires, insulation materials, ventilation ducts and other components, the finite element simulation graph is established, By endowing the material properties of each part of the reactor, meshing, and based on the combined calculation method of magnetic field and circuit, the reactor loss under typical working conditions is calculated. Through the joint mathematical calculation method of reactor loss and fluid-temperature field, considering the effects of reactor heat conduction, natural convection and radiation, the magnetic field and temperature distribution law of reactor body winding and upper and lower supports are obtained. Finally, the difference between the simulation value and the experimental value of the body temperature is compared, and the convection heat transfer law of the body and the axial and radial temperature distribution law of the package are revealed.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"98 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114031750","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 : 2022-11-11DOI: 10.1109/APET56294.2022.10072809
Lei Lin, Zhaodi Yang, L. Luo, Yalong Li, Xiaohu Dong, Xiaoxing Zhang, Feng Yang
Tetracycline antibiotics (TCs) are one of the most widely used antibiotics in recent years, which are chemically very stable and the wastewater containing tetracycline is highly toxic and difficult to degrade. In this paper, the effect of air as the background gas on the degradation of tetracyclines was investigated based on Dielectric Barrier Discharge (DBD) technology. The results show that DBD plasma can degrade tetracycline at higher gas flow rate, higher input power and lower liquid flow rate; the highest degradation rate of tetracycline reached 33.9% under the optimal reaction conditions of 1000 mL/min gas flow rate, 90 W input power and 100 mL/min liquid flow rate; At this time, the voltage and current discharge waveforms are uniform sine waves, with a peak discharge voltage of about 16 kV and a current amplitude of 0.55 mA. This study provides a new solution idea for the treatment of TCs wastewater.
{"title":"Experimental Study on the Degradation of Tetracycline by Air to Dielectric Barrier Discharge","authors":"Lei Lin, Zhaodi Yang, L. Luo, Yalong Li, Xiaohu Dong, Xiaoxing Zhang, Feng Yang","doi":"10.1109/APET56294.2022.10072809","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10072809","url":null,"abstract":"Tetracycline antibiotics (TCs) are one of the most widely used antibiotics in recent years, which are chemically very stable and the wastewater containing tetracycline is highly toxic and difficult to degrade. In this paper, the effect of air as the background gas on the degradation of tetracyclines was investigated based on Dielectric Barrier Discharge (DBD) technology. The results show that DBD plasma can degrade tetracycline at higher gas flow rate, higher input power and lower liquid flow rate; the highest degradation rate of tetracycline reached 33.9% under the optimal reaction conditions of 1000 mL/min gas flow rate, 90 W input power and 100 mL/min liquid flow rate; At this time, the voltage and current discharge waveforms are uniform sine waves, with a peak discharge voltage of about 16 kV and a current amplitude of 0.55 mA. This study provides a new solution idea for the treatment of TCs wastewater.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114478789","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 : 2022-11-11DOI: 10.1109/APET56294.2022.10072944
Guoshu Lai, Q. Ye, Xiaoying Wei, Yinggao Chen, Haibin Li, Tao Jin
With the development of industry and the goal of decarburation, the proportion of new energy vehicles in the market is getting higher and higher, and the demand for DC charging piles is increasing. Therefore, it is necessary to design a perfect charging pile structure. In this paper, a novel DC charging pile structure based on soft switching technology is proposed, which consists of a power factor correction (PFC) part connected to the power grid and a post-stage ZVS soft switching DC/DC converter. The front PFC uses a three-phase, three-wire VIENNA rectifier. Each power bridge arm consists of two fast diodes and a power switch where current flows in both directions. The rear ZVS soft switch DC/DC converter is composed of three-level half-bridge DC/AC inverter unit, isolation transformer, AC/DC full bridge rectifier unit, output filter unit and output load. In this paper, based on the soft switch technology of new type dc charging pile structure of resonant inductance and resonant capacitance between the resonance, and the three level structure of half bridge converter adopts the phase shifting control method, realized the zero voltage soft switching, small switch loss, high system efficiency and switch tube the characteristics of low voltage, at the same time, The combination with the three-phase three-wire VIENNA rectifier makes the structure more widely used.
{"title":"Research on Structure of the Novel DC Charging Pile Based on Soft Switch Technology","authors":"Guoshu Lai, Q. Ye, Xiaoying Wei, Yinggao Chen, Haibin Li, Tao Jin","doi":"10.1109/APET56294.2022.10072944","DOIUrl":"https://doi.org/10.1109/APET56294.2022.10072944","url":null,"abstract":"With the development of industry and the goal of decarburation, the proportion of new energy vehicles in the market is getting higher and higher, and the demand for DC charging piles is increasing. Therefore, it is necessary to design a perfect charging pile structure. In this paper, a novel DC charging pile structure based on soft switching technology is proposed, which consists of a power factor correction (PFC) part connected to the power grid and a post-stage ZVS soft switching DC/DC converter. The front PFC uses a three-phase, three-wire VIENNA rectifier. Each power bridge arm consists of two fast diodes and a power switch where current flows in both directions. The rear ZVS soft switch DC/DC converter is composed of three-level half-bridge DC/AC inverter unit, isolation transformer, AC/DC full bridge rectifier unit, output filter unit and output load. In this paper, based on the soft switch technology of new type dc charging pile structure of resonant inductance and resonant capacitance between the resonance, and the three level structure of half bridge converter adopts the phase shifting control method, realized the zero voltage soft switching, small switch loss, high system efficiency and switch tube the characteristics of low voltage, at the same time, The combination with the three-phase three-wire VIENNA rectifier makes the structure more widely used.","PeriodicalId":201727,"journal":{"name":"2022 Asia Power and Electrical Technology Conference (APET)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123970098","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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