Pub Date : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510963
Yakun Zhou, Z. Wei, Xi Chen, Xuefan Wang, Guoqing Hu, Caiyi Ye
Brushless doubly-fed machine (BDFM) is widely used in wind power, hydraulic power, marine shaft and other variable-speed constant-frequency power generation fields due to its reliable structure and flexible excitation regulation. This paper presents a double side variable frequency (DSVF) based brushless doubly-fed generator (BDFG) system with specific control strategy. Compared with the traditional brushless doubly-fed generator system, this system has the advantages of simple topology, good dynamic response and strong robustness. Moreover, the power winding frequency and control winding frequency of the BDFM are flexibly adjustable. Finally, experimental results from a 30 kW BDFM prototype verify the feasibility and reliability of the proposed system topology and control strategy.
{"title":"Design and Control of the Double Side Variable Frequency Based Brushless Doubly-Fed Generator System","authors":"Yakun Zhou, Z. Wei, Xi Chen, Xuefan Wang, Guoqing Hu, Caiyi Ye","doi":"10.1109/CIEEC50170.2021.9510963","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510963","url":null,"abstract":"Brushless doubly-fed machine (BDFM) is widely used in wind power, hydraulic power, marine shaft and other variable-speed constant-frequency power generation fields due to its reliable structure and flexible excitation regulation. This paper presents a double side variable frequency (DSVF) based brushless doubly-fed generator (BDFG) system with specific control strategy. Compared with the traditional brushless doubly-fed generator system, this system has the advantages of simple topology, good dynamic response and strong robustness. Moreover, the power winding frequency and control winding frequency of the BDFM are flexibly adjustable. Finally, experimental results from a 30 kW BDFM prototype verify the feasibility and reliability of the proposed system topology and control strategy.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126169154","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 : 2021-05-28DOI: 10.1109/cieec50170.2021.9510935
Mingze Zhang, Xincong Li, Sheng Hua
Multi-station integration is the integration of various stations such as substation, energy storage station, data center, photovoltaic station, and 5G base station. In order to solve the problem of optimal design and coordinated operation of multi-station under the constraints of station conditions, load demand and economic benefits, this paper presented the capacity planning method and economic analysis of each station in multi-station. Firstly, the integration relationship between stations in multi-station was analyzed. Then, the capacity of each station was planned with the goal of maximizing the utilization rate of existing substation site and meeting the demand of surrounding load. Finally, the economic benefit of the configured capacity was analyzed with a case to provide reference for multi-station project.
{"title":"Capacity Planning and Economic Benefit Analysis of Multi-station Integration","authors":"Mingze Zhang, Xincong Li, Sheng Hua","doi":"10.1109/cieec50170.2021.9510935","DOIUrl":"https://doi.org/10.1109/cieec50170.2021.9510935","url":null,"abstract":"Multi-station integration is the integration of various stations such as substation, energy storage station, data center, photovoltaic station, and 5G base station. In order to solve the problem of optimal design and coordinated operation of multi-station under the constraints of station conditions, load demand and economic benefits, this paper presented the capacity planning method and economic analysis of each station in multi-station. Firstly, the integration relationship between stations in multi-station was analyzed. Then, the capacity of each station was planned with the goal of maximizing the utilization rate of existing substation site and meeting the demand of surrounding load. Finally, the economic benefit of the configured capacity was analyzed with a case to provide reference for multi-station project.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123700706","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 : 2021-05-28DOI: 10.1109/cieec50170.2021.9510241
Mengzi Zheng, Weiguang Huang, Chuang Gao
For the design of high-speed permanent magnet (PM) machines (HSPMMs), the first consideration is whether the rotor can meet the stress requirements. In this paper, considering multi-layer and multi-angle winding of carbon fiber sleeve (CFS), the stress of a bread-type rotor of an HSPMM with 80 kW, 60000 rpm is studied in detail. First, the optimization analysis of the rotor stress is carried out to determine the PM material, rotor diameter, CFS thickness, and interference between the CFS and the PM. Then, the temperature field calculation of the HSPMM is performed to analyze the rotor thermal stress more precisely. Finally, the detailed stress analysis of the rotor with multi-layer and multi-angle winding CFS is carried out based on the thermal-stress coupling, and the PM rotors suitable for mass and prototype production are designed respectively.
{"title":"Rotor Stress Analysis of a High-Speed Permanent Magnet Machine Considering Multi-Layer and Multi-Angle Winding of Carbon Fiber Sleeve","authors":"Mengzi Zheng, Weiguang Huang, Chuang Gao","doi":"10.1109/cieec50170.2021.9510241","DOIUrl":"https://doi.org/10.1109/cieec50170.2021.9510241","url":null,"abstract":"For the design of high-speed permanent magnet (PM) machines (HSPMMs), the first consideration is whether the rotor can meet the stress requirements. In this paper, considering multi-layer and multi-angle winding of carbon fiber sleeve (CFS), the stress of a bread-type rotor of an HSPMM with 80 kW, 60000 rpm is studied in detail. First, the optimization analysis of the rotor stress is carried out to determine the PM material, rotor diameter, CFS thickness, and interference between the CFS and the PM. Then, the temperature field calculation of the HSPMM is performed to analyze the rotor thermal stress more precisely. Finally, the detailed stress analysis of the rotor with multi-layer and multi-angle winding CFS is carried out based on the thermal-stress coupling, and the PM rotors suitable for mass and prototype production are designed respectively.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125433669","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510896
B. Wan, Jianben Liu, Bo Tan, Xuan Zhang, Lei Gao, Zhuohong Pan
The design and operation of DC grounding electrodes and the assessment of their adverse effects on the surrounding environment bring considerable difficulties and uncertainties in their realization. The technical characteristics of five geologic exploration methods applied to fine geodetic electrical exploration are first compared, and the linear filtering considering depth of burial and the transmission line model has been proposed to solve the problem of high theoretical difficulty and complicated algorithm in solving the fine earth model of the horizontal layered DC grounding pole.
{"title":"Exploration and Calculation of Very Fine Geodetic Model for DC Grounding Electrodes, Part I: Measurement and Computation","authors":"B. Wan, Jianben Liu, Bo Tan, Xuan Zhang, Lei Gao, Zhuohong Pan","doi":"10.1109/CIEEC50170.2021.9510896","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510896","url":null,"abstract":"The design and operation of DC grounding electrodes and the assessment of their adverse effects on the surrounding environment bring considerable difficulties and uncertainties in their realization. The technical characteristics of five geologic exploration methods applied to fine geodetic electrical exploration are first compared, and the linear filtering considering depth of burial and the transmission line model has been proposed to solve the problem of high theoretical difficulty and complicated algorithm in solving the fine earth model of the horizontal layered DC grounding pole.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114899373","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510408
Song Li, Yongli Li, Tao Li, Ningning Liu
To realize the power dispatch in hybrid AC/DC microgrid involving multi-terminal AC and DC subgrids (HMG-MADS) and enhance the system inertia, a comprehensive control is proposed in this paper. Based on the principle of virtual synchronous generator (VSG) and virtual DC capacitor (VDC), the interrelationships of the bi-directional AC/DC converter (BAC) and bi-directional DC/DC converter (BDC) are analyzed. Then the demand of the virtual inertia is defined for BAC and BDC to enhance the system inertia while the reasonable power exchange law is determined for them to realize power support among the subgrids. Meanwhile, the AC subgrids voltage/frequency and DC subgrids voltage are well controlled by comprehensive control. With the defined demand of the virtual inertia and reasonable power exchange rule, a new P/V droop principle for BAC and a new P/V droop principle for BDC is established which can realize a proper assignment of subgrids supportive power and improve the system dynamic response. Finally, simulation results are demonstrated to show the effectiveness and feasibility of the comprehensive control algorithm.
{"title":"A Comprehensive Control for Islanded Hybrid AC/DC Microgrid Involving Multi-terminal AC and DC Subgrids","authors":"Song Li, Yongli Li, Tao Li, Ningning Liu","doi":"10.1109/CIEEC50170.2021.9510408","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510408","url":null,"abstract":"To realize the power dispatch in hybrid AC/DC microgrid involving multi-terminal AC and DC subgrids (HMG-MADS) and enhance the system inertia, a comprehensive control is proposed in this paper. Based on the principle of virtual synchronous generator (VSG) and virtual DC capacitor (VDC), the interrelationships of the bi-directional AC/DC converter (BAC) and bi-directional DC/DC converter (BDC) are analyzed. Then the demand of the virtual inertia is defined for BAC and BDC to enhance the system inertia while the reasonable power exchange law is determined for them to realize power support among the subgrids. Meanwhile, the AC subgrids voltage/frequency and DC subgrids voltage are well controlled by comprehensive control. With the defined demand of the virtual inertia and reasonable power exchange rule, a new P/V droop principle for BAC and a new P/V droop principle for BDC is established which can realize a proper assignment of subgrids supportive power and improve the system dynamic response. Finally, simulation results are demonstrated to show the effectiveness and feasibility of the comprehensive control algorithm.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114955255","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510601
Fanghua Qin, Fei Tang, Tongyan Zhang, Xiaoqing Wei, Yu Li
With the continuous development of photovoltaic (PV) grid-connected technology, the PV grid-connected capacity has increased sustainably. Due to the stochastic volatility and indirectness of PV power, the PV grid-connected technology has greatly influenced system instability mode and oscillation center distribution. The simulation is carried out under two conditions: the location of PV grid-connected; the relative position between fault point and PV power, which is based on the out-of-step oscillation criterion of the bus voltage frequency, the PV power supply model and its control strategy. The results show that the change of PV grid-connected location will change the system's equivalent external characteristics and cause the oscillation center to migrate between different lines. The frequency of oscillation center migration increases when the fault location is closer to the PV grid-connected location.
{"title":"Impact of Photovoltaic Grid-connected on Distribution of Power System Disturbed Oscillation Center","authors":"Fanghua Qin, Fei Tang, Tongyan Zhang, Xiaoqing Wei, Yu Li","doi":"10.1109/CIEEC50170.2021.9510601","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510601","url":null,"abstract":"With the continuous development of photovoltaic (PV) grid-connected technology, the PV grid-connected capacity has increased sustainably. Due to the stochastic volatility and indirectness of PV power, the PV grid-connected technology has greatly influenced system instability mode and oscillation center distribution. The simulation is carried out under two conditions: the location of PV grid-connected; the relative position between fault point and PV power, which is based on the out-of-step oscillation criterion of the bus voltage frequency, the PV power supply model and its control strategy. The results show that the change of PV grid-connected location will change the system's equivalent external characteristics and cause the oscillation center to migrate between different lines. The frequency of oscillation center migration increases when the fault location is closer to the PV grid-connected location.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115993377","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510926
Xiujuan Ma, J. Zhao, Mei Zhao
As more and more plug-in electric vehicles(EVs) are connected 'to the power grid, EVs have also become one of the most widely used flexible loads. They will take an important part in the autonomous power systems and will have a large impact in the power frequency fluctuations. In this paper, considering the uncertainty of family EVs travel law and the maintenance of the state of charge(SoC) of the EVs’ power battery, an adaptive comprehensive control strategy of EV cluster participating in the primary frequency control(PFR) of the power grid is investigated, which applies fuzzy control and variable coefficient droop control. The strategy is applied to a single area primary frequency modulation model with EVs. Finally, simulations are provided to illustrate the effectiveness of the proposed comprehensive control strategy.
{"title":"Adaptive Control Strategy of Electric Vehicles Participating in Primary Frequency Regulation of Power Grid","authors":"Xiujuan Ma, J. Zhao, Mei Zhao","doi":"10.1109/CIEEC50170.2021.9510926","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510926","url":null,"abstract":"As more and more plug-in electric vehicles(EVs) are connected 'to the power grid, EVs have also become one of the most widely used flexible loads. They will take an important part in the autonomous power systems and will have a large impact in the power frequency fluctuations. In this paper, considering the uncertainty of family EVs travel law and the maintenance of the state of charge(SoC) of the EVs’ power battery, an adaptive comprehensive control strategy of EV cluster participating in the primary frequency control(PFR) of the power grid is investigated, which applies fuzzy control and variable coefficient droop control. The strategy is applied to a single area primary frequency modulation model with EVs. Finally, simulations are provided to illustrate the effectiveness of the proposed comprehensive control strategy.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116069006","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 : 2021-05-28DOI: 10.1109/cieec50170.2021.9510907
Xu Pei-dong, Xu Gang, Yu Bing-qi, Feng Jing, Shi Chun-Min, Wang Tian-xu
The risk of cascading failure in power grid can be integrated the possibility and severity of cascading failure severity. The possibility in traditional risk assessment only considered the line failure rate, but the line overload outage is one of the important reasons lead to cascading failure too. In order to consider the complex uncertainty in actual power system, according to the line protection actions, environmental and weather factors and human errors caused by the line fault and line overload to get the line outage probability, further set up cascading failure risk assessment model of power grid considering line outage rate .The simulation of the WSCC-9 buses system proved that the proposed method is with correctness and objectivity, provided with engineering value.
{"title":"Cascading Failure Risk Assessment in Power Grid Based On the Line Outage Rate","authors":"Xu Pei-dong, Xu Gang, Yu Bing-qi, Feng Jing, Shi Chun-Min, Wang Tian-xu","doi":"10.1109/cieec50170.2021.9510907","DOIUrl":"https://doi.org/10.1109/cieec50170.2021.9510907","url":null,"abstract":"The risk of cascading failure in power grid can be integrated the possibility and severity of cascading failure severity. The possibility in traditional risk assessment only considered the line failure rate, but the line overload outage is one of the important reasons lead to cascading failure too. In order to consider the complex uncertainty in actual power system, according to the line protection actions, environmental and weather factors and human errors caused by the line fault and line overload to get the line outage probability, further set up cascading failure risk assessment model of power grid considering line outage rate .The simulation of the WSCC-9 buses system proved that the proposed method is with correctness and objectivity, provided with engineering value.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116157599","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510452
Dingqin Wang, E. Zhao, Qihao Liu, Songze Yang, Kecheng Zhang, Shengzhi Xu, Jianjun Zhang, Chunming Li
This study presents the design of a flexible commutation switch based on an AC power frequency converter (AFC) to control the three-phase imbalance in a distribution system. The traditional commutation switch mainly uses an interphase commutation device as the basis for the rapid commutation of the load. However, it causes a sudden change in the phase of the load voltage during commutation, which causes an inductive load to generate an in-rush current and seriously affects stable operation of the equipment. A traditional commutation switch has higher requirements for commutation time to ensuring normal power supply; also, it has the risk of causing a short circuit between phases during commutation. To solve these problems, this study proposes a new type of commutation switch based on the AFC. The switch removes the load from the power grid by providing transitional voltage with the same frequency and phase as the load voltage, and then controls the AFC output voltage so that the load can smoothly switch from one phase to another, solving the problem of sudden phase changes in the load voltage. Also, the power grid has no risk of a short circuit between the two phases during the commutation process. In this study, the feasibility of the designed commutation switch and commutation scheme based on AFC was verified through MATLAB/Simulink simulation, and the actual circuit was built.
{"title":"Design of a Flexible Commutation Switch Based on AC Power Frequency Converter","authors":"Dingqin Wang, E. Zhao, Qihao Liu, Songze Yang, Kecheng Zhang, Shengzhi Xu, Jianjun Zhang, Chunming Li","doi":"10.1109/CIEEC50170.2021.9510452","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510452","url":null,"abstract":"This study presents the design of a flexible commutation switch based on an AC power frequency converter (AFC) to control the three-phase imbalance in a distribution system. The traditional commutation switch mainly uses an interphase commutation device as the basis for the rapid commutation of the load. However, it causes a sudden change in the phase of the load voltage during commutation, which causes an inductive load to generate an in-rush current and seriously affects stable operation of the equipment. A traditional commutation switch has higher requirements for commutation time to ensuring normal power supply; also, it has the risk of causing a short circuit between phases during commutation. To solve these problems, this study proposes a new type of commutation switch based on the AFC. The switch removes the load from the power grid by providing transitional voltage with the same frequency and phase as the load voltage, and then controls the AFC output voltage so that the load can smoothly switch from one phase to another, solving the problem of sudden phase changes in the load voltage. Also, the power grid has no risk of a short circuit between the two phases during the commutation process. In this study, the feasibility of the designed commutation switch and commutation scheme based on AFC was verified through MATLAB/Simulink simulation, and the actual circuit was built.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122427496","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510620
Lei Yang, Jinding He, Wenlin Yan, Dan Zhang, Xiaogang Wu, Run Huang, Yao Luo, Guang Cai
The traditional low voltage ride through (LVRT) control method is mainly adjusted from the inside of the new energy field station. Generally, by improving the Crowbar circuit or optimizing the excitation control of the converter, the renewable energy can be operated without offline at a low voltage and reduce its reactive power absorption to the system. Based on the current LVRT status, this paper proposes a DFIG control strategy during LVRT, and introduces the sensitivity coefficient to calculate the influence factor of the wind farm on the faulty node in the regional network to optimize the reactive power distribution of the wind farm near the faulty node. This stable working state of DFIG during LVRT speeds up the recovery speed of the system after it breaks away from the fault. The simulation analysis on the Yunnan regional power grid verifies the feasibility and superiority of the theory, and provides a new idea for the control strategy of renewable energy during LVRT.
{"title":"Reactive Power Support Strategy for Low Voltage Ride Through Based on Sensitivity Analysis","authors":"Lei Yang, Jinding He, Wenlin Yan, Dan Zhang, Xiaogang Wu, Run Huang, Yao Luo, Guang Cai","doi":"10.1109/CIEEC50170.2021.9510620","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510620","url":null,"abstract":"The traditional low voltage ride through (LVRT) control method is mainly adjusted from the inside of the new energy field station. Generally, by improving the Crowbar circuit or optimizing the excitation control of the converter, the renewable energy can be operated without offline at a low voltage and reduce its reactive power absorption to the system. Based on the current LVRT status, this paper proposes a DFIG control strategy during LVRT, and introduces the sensitivity coefficient to calculate the influence factor of the wind farm on the faulty node in the regional network to optimize the reactive power distribution of the wind farm near the faulty node. This stable working state of DFIG during LVRT speeds up the recovery speed of the system after it breaks away from the fault. The simulation analysis on the Yunnan regional power grid verifies the feasibility and superiority of the theory, and provides a new idea for the control strategy of renewable energy during LVRT.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122711749","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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