With the influx of a large number of distributed wind and solar resources into the distribution network., the operation uncertainty of the distribution network is stronger, and the traditional method of using only flexibility indicators to analyze the access capacity of ADN distributed wind and photovoltaic resources will lead to low results. In order to solve the problem that the existing methods are inaccurate in the acceptance and assessment of wind and solar resources in the distribution network, it is proposed to comprehensively consider the flexibility evaluation index and the clean energy consumption quality index, and analyze the access capacity of distributed wind and solar resources under the current distribution network structure in combination with the operating constraints. First, set renewable energy output model; Secondly, construct distribution grid flexibility evaluation indexes and clean energy consumption quality indexes that include constraints, and take into account the two objectives of wind and PV resource access capacity and distribution grid operation costs; Finally, taking the IEEE33 power distribution system as the example model, the effectiveness and rationality of the proposed method are verified by comparing the results obtained by comparing the results obtained by three different schemes.
{"title":"Allowable Capacity Analysis of Distributed Renewable Energy Resources in Active Distribution Network","authors":"Xiaobing Liang, Yue Yang, Ranran An, Zhulu Zhang, Shuai Liu, Haoran Guo","doi":"10.1109/ACFPE56003.2022.9952240","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952240","url":null,"abstract":"With the influx of a large number of distributed wind and solar resources into the distribution network., the operation uncertainty of the distribution network is stronger, and the traditional method of using only flexibility indicators to analyze the access capacity of ADN distributed wind and photovoltaic resources will lead to low results. In order to solve the problem that the existing methods are inaccurate in the acceptance and assessment of wind and solar resources in the distribution network, it is proposed to comprehensively consider the flexibility evaluation index and the clean energy consumption quality index, and analyze the access capacity of distributed wind and solar resources under the current distribution network structure in combination with the operating constraints. First, set renewable energy output model; Secondly, construct distribution grid flexibility evaluation indexes and clean energy consumption quality indexes that include constraints, and take into account the two objectives of wind and PV resource access capacity and distribution grid operation costs; Finally, taking the IEEE33 power distribution system as the example model, the effectiveness and rationality of the proposed method are verified by comparing the results obtained by comparing the results obtained by three different schemes.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125160218","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 : 2022-10-01DOI: 10.1109/ACFPE56003.2022.9952326
Haibin Zhang, Shilei Huang, Jiaqing Zhang, Wen Shi, Fengju Shang, D. Kong, Bingqing Li, Wanru Hong
With the increase in the number of transformers., the internal transformer oil fire protection is severe. Under various situations., the effectiveness of foam extinguishing agent in suppressing fires varies substantially. This research establishes a targeted evaluation index system appropriate for transformer oil fire based on the relevant national standards and researches., and then formulates the value standard of each index based on the relevant national standards and experimental data in order to choose the most suitable foam fire extinguishing agent for transformer oil fire. The research then uses the entropy weight TOPSIS approach to evaluate the applicability of three different types of foam extinguishing agents based on the index system. The results demonstrated that fluoroprotein foam performs most effectively overall. As a result., choosing fluoroprotein foam as the substation foam extinguishing agent is advised.
{"title":"Evaluation Index System of Fire Extinguishing Agent Suitable for Transformer Oil Fire Based on Entropy Weight TOPSIS","authors":"Haibin Zhang, Shilei Huang, Jiaqing Zhang, Wen Shi, Fengju Shang, D. Kong, Bingqing Li, Wanru Hong","doi":"10.1109/ACFPE56003.2022.9952326","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952326","url":null,"abstract":"With the increase in the number of transformers., the internal transformer oil fire protection is severe. Under various situations., the effectiveness of foam extinguishing agent in suppressing fires varies substantially. This research establishes a targeted evaluation index system appropriate for transformer oil fire based on the relevant national standards and researches., and then formulates the value standard of each index based on the relevant national standards and experimental data in order to choose the most suitable foam fire extinguishing agent for transformer oil fire. The research then uses the entropy weight TOPSIS approach to evaluate the applicability of three different types of foam extinguishing agents based on the index system. The results demonstrated that fluoroprotein foam performs most effectively overall. As a result., choosing fluoroprotein foam as the substation foam extinguishing agent is advised.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127129153","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 : 2022-10-01DOI: 10.1109/ACFPE56003.2022.9952293
Z. Jiang, Zhizhou Shang, Feng Guo, Yupeng Wang
With the continuous development of power systems, the safety of transmission lines has become an important issue, such as the impact of trees under transmission lines on line safety. Therefore, a set of online supervision plan has been developed for the current status quo of potential safety hazards and complex operating environment. This article mainly introduces a remote automatic detection device based on visualized three-dimensional digital model technology and mobile communication module. This method can effectively improve the efficiency of inspection work.
{"title":"Research on Tree Detection under Transmission Line Based on 3D Visualization","authors":"Z. Jiang, Zhizhou Shang, Feng Guo, Yupeng Wang","doi":"10.1109/ACFPE56003.2022.9952293","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952293","url":null,"abstract":"With the continuous development of power systems, the safety of transmission lines has become an important issue, such as the impact of trees under transmission lines on line safety. Therefore, a set of online supervision plan has been developed for the current status quo of potential safety hazards and complex operating environment. This article mainly introduces a remote automatic detection device based on visualized three-dimensional digital model technology and mobile communication module. This method can effectively improve the efficiency of inspection work.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126942378","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 : 2022-10-01DOI: 10.1109/ACFPE56003.2022.9952208
Haiwei Liu, W. Zhen, Baixu Chen, Weicheng Shen, Kaisong Dong, Xiping Ma
To improve the power generation efficiency of photovoltaic (PV) arrays, this paper applies the sliding mode control (SMC) strategy to two-stage PV off-grid and grid-connected inverters to keep follow the maximum power point (MPP) of PV arrays and compare it with the traditional perturbation observation (P&O) strategy on both dynamic and stationary performance. The PV off-grid system uses the SMC strategy for the front stage and a three-phase sinusoidal pulse-width modulation (SPWM) strategy for the back stage; the PV grid-connected system uses the SMC strategy for the front stage and a double-closed-loop modulation strategy for the back stage with an external loop of grid voltage and an internal loop of current. Simulation reports demonstrated that the SMC could succeed in tracking on MPP and that two-stage PV off-grid and grid-connected inverters can output power to the load and the grid stably.
{"title":"Sliding-Mode Control with Two-Stage Photovoltaic Off-Grid and Grid-Connected Inverters","authors":"Haiwei Liu, W. Zhen, Baixu Chen, Weicheng Shen, Kaisong Dong, Xiping Ma","doi":"10.1109/ACFPE56003.2022.9952208","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952208","url":null,"abstract":"To improve the power generation efficiency of photovoltaic (PV) arrays, this paper applies the sliding mode control (SMC) strategy to two-stage PV off-grid and grid-connected inverters to keep follow the maximum power point (MPP) of PV arrays and compare it with the traditional perturbation observation (P&O) strategy on both dynamic and stationary performance. The PV off-grid system uses the SMC strategy for the front stage and a three-phase sinusoidal pulse-width modulation (SPWM) strategy for the back stage; the PV grid-connected system uses the SMC strategy for the front stage and a double-closed-loop modulation strategy for the back stage with an external loop of grid voltage and an internal loop of current. Simulation reports demonstrated that the SMC could succeed in tracking on MPP and that two-stage PV off-grid and grid-connected inverters can output power to the load and the grid stably.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115280656","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 : 2022-10-01DOI: 10.1109/ACFPE56003.2022.9952323
Fang Liu, Y. Qiao, Yang Liu, Wei Wang, Xinting Yang, Huaqiang Li, Miaomiao Wang
In order to realize the market-oriented promotion of cloud energy storage business, on the premise of ensuring the optimal benefit of user groups, a cloud energy storage service mechanism considering electric energy trading is proposed. The bidding form is introduced into power trading to effectively motivate users to actively participate in the service and expand ideas for the commercialization of cloud energy storage business. First, a detailed cloud energy storage service mechanism architecture and business process are designed. Secondly, a day-ahead power dispatching model and strategy aiming at the minimum net energy cost of the user groups are constructed. Then, an electricity bidding and matching strategy in the form of multiple rounds of collective bidding is established. And the benefits of each participant are clarified. Finally, a park is taken as an example to verify the effectiveness of the proposed service mechanism. The results show that this mechanism can promote the local consumption of renewable energy, reduce the energy cost of users, increase the service engagement of users, and achieve a win-win situation for all parties.
{"title":"Cloud Energy Storage Service Mechanism considering Power Transaction","authors":"Fang Liu, Y. Qiao, Yang Liu, Wei Wang, Xinting Yang, Huaqiang Li, Miaomiao Wang","doi":"10.1109/ACFPE56003.2022.9952323","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952323","url":null,"abstract":"In order to realize the market-oriented promotion of cloud energy storage business, on the premise of ensuring the optimal benefit of user groups, a cloud energy storage service mechanism considering electric energy trading is proposed. The bidding form is introduced into power trading to effectively motivate users to actively participate in the service and expand ideas for the commercialization of cloud energy storage business. First, a detailed cloud energy storage service mechanism architecture and business process are designed. Secondly, a day-ahead power dispatching model and strategy aiming at the minimum net energy cost of the user groups are constructed. Then, an electricity bidding and matching strategy in the form of multiple rounds of collective bidding is established. And the benefits of each participant are clarified. Finally, a park is taken as an example to verify the effectiveness of the proposed service mechanism. The results show that this mechanism can promote the local consumption of renewable energy, reduce the energy cost of users, increase the service engagement of users, and achieve a win-win situation for all parties.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115670767","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 : 2022-10-01DOI: 10.1109/ACFPE56003.2022.9952318
Xinwen Zhang, B. Liu, Feng Gao, Dunwen Song, Xukai Zhu
Temperature field testing is an important part of testing the design quality of high-frequency transformers in power electronic transformers (PET) or isolating DC-DC converters. The test process requires reproducing the application scenarios of high-frequency transformers and at the same time reducing the power consumption of the test power as much as possible. To this end, this paper designs a DC power feedback type high-frequency transformer temperature field test power supply. The power supply is mainly composed of power frequency AC-DC and back-to-back high-frequency transformers, DC-AC and AC-DC modules. Power diodes and resistors are connected in series with high-frequency AC-DC and DC-AC DC sides to form a DC power feed link. The sum of the high-frequency DC-AC DC voltage and the DC feeding resistance voltage is used as the set value of the high-frequency AC-DC DC voltage output., and the single-phase shift of DC-DC control is adopted to achieve the target current output of the test power supply. At the same time, a mathematical model between the input and output current of the test power supply and the grid-side current is established, which provides a theoretical basis for the energy-saving evaluation of the energy feedback test method. Finally, the test power supply experiment simulation system was built, and the results confirmed the correctness of the test plan.
{"title":"Study on the Topology and Control Method of a Power Supply for Temperature Field Test of High-frequency Transformer","authors":"Xinwen Zhang, B. Liu, Feng Gao, Dunwen Song, Xukai Zhu","doi":"10.1109/ACFPE56003.2022.9952318","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952318","url":null,"abstract":"Temperature field testing is an important part of testing the design quality of high-frequency transformers in power electronic transformers (PET) or isolating DC-DC converters. The test process requires reproducing the application scenarios of high-frequency transformers and at the same time reducing the power consumption of the test power as much as possible. To this end, this paper designs a DC power feedback type high-frequency transformer temperature field test power supply. The power supply is mainly composed of power frequency AC-DC and back-to-back high-frequency transformers, DC-AC and AC-DC modules. Power diodes and resistors are connected in series with high-frequency AC-DC and DC-AC DC sides to form a DC power feed link. The sum of the high-frequency DC-AC DC voltage and the DC feeding resistance voltage is used as the set value of the high-frequency AC-DC DC voltage output., and the single-phase shift of DC-DC control is adopted to achieve the target current output of the test power supply. At the same time, a mathematical model between the input and output current of the test power supply and the grid-side current is established, which provides a theoretical basis for the energy-saving evaluation of the energy feedback test method. Finally, the test power supply experiment simulation system was built, and the results confirmed the correctness of the test plan.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115793913","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}
With the large-scale integration of the distributed photovoltaic (PV) power generation system and power-electronic-device-based loads such as electric vehicles and data centers. The low voltage direct current supply and utilization system (LVDCSUS) has received much attention from academics and industry in recent years. However, the initial research has not been conducted in the LVDCSUS, including but not limited to operation modes, control strategy, protection, grounding mode. As one of the most important factors in the operation, reliability, and protection configuration of LVDCSUS, the choosing of the grounding mode in the LVDCSUS may influence the transient characteristics of the connecting point of the energy storage and PV generation system, which will determine the operating stability of the LVDCSUS. To provide a guideline to future LVDCSUS grounding mode chosen in different operation conditions, in this paper, the transient characteristics of the DC bus, energy storage port and photovoltaic power supply port of the symmetrical monopole system after the monopole ground fault of the DC bus are analyzed, and the influence of the grounding fault on the power generation and energy storage module operation of the low-voltage DC system is discussed. The research can provide reference for the selection of grounding mode and the configuration of fault protection in the LVDCSUS.
{"title":"Grounding Operation Analysis of Low Voltage Direct Current Supply and Utilization System","authors":"Shukang Zhao, Yuanyuan Sun, Kaiqi Sun, Shulin Yin, C. Tian, Xingqi Wu","doi":"10.1109/ACFPE56003.2022.9952281","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952281","url":null,"abstract":"With the large-scale integration of the distributed photovoltaic (PV) power generation system and power-electronic-device-based loads such as electric vehicles and data centers. The low voltage direct current supply and utilization system (LVDCSUS) has received much attention from academics and industry in recent years. However, the initial research has not been conducted in the LVDCSUS, including but not limited to operation modes, control strategy, protection, grounding mode. As one of the most important factors in the operation, reliability, and protection configuration of LVDCSUS, the choosing of the grounding mode in the LVDCSUS may influence the transient characteristics of the connecting point of the energy storage and PV generation system, which will determine the operating stability of the LVDCSUS. To provide a guideline to future LVDCSUS grounding mode chosen in different operation conditions, in this paper, the transient characteristics of the DC bus, energy storage port and photovoltaic power supply port of the symmetrical monopole system after the monopole ground fault of the DC bus are analyzed, and the influence of the grounding fault on the power generation and energy storage module operation of the low-voltage DC system is discussed. The research can provide reference for the selection of grounding mode and the configuration of fault protection in the LVDCSUS.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"64 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115823187","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 : 2022-10-01DOI: 10.1109/ACFPE56003.2022.9952335
Yang Sun, Baoxin Hao, Bo Su, Qing Fan, Chengqun Sun
High voltage circuit breaker (HVCB) is an essential and important device of power grid, while any faults occurred in operation mechanism of HVCB will greatly jeopardize reliability and safety of power system. In order to improve fault diagnosis performance, a new fault diagnosis method using random forest (RF) and kernel extreme learning machine (KELM) is presented in this paper. At first, RF is applied to select the critical features derived from coil current. Then, the selected features are applied as inputs of KEML to establish fault diagnosis model. Next, particle swarm optimization (PSO) is introduced to turn crucial parameters of KELM to enhance diagnosis accuracy. Finally, practical samples are used to assess fault diagnosis performance of the presented method. Experimental results indicates the proposed RF-KELM method is capable of providing higher diagnosis accuracy than conventional approaches, which indicates promising future.
{"title":"Fault diagnosis of High Voltage Circuit Breaker using Random Forest and PSo-KELM","authors":"Yang Sun, Baoxin Hao, Bo Su, Qing Fan, Chengqun Sun","doi":"10.1109/ACFPE56003.2022.9952335","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952335","url":null,"abstract":"High voltage circuit breaker (HVCB) is an essential and important device of power grid, while any faults occurred in operation mechanism of HVCB will greatly jeopardize reliability and safety of power system. In order to improve fault diagnosis performance, a new fault diagnosis method using random forest (RF) and kernel extreme learning machine (KELM) is presented in this paper. At first, RF is applied to select the critical features derived from coil current. Then, the selected features are applied as inputs of KEML to establish fault diagnosis model. Next, particle swarm optimization (PSO) is introduced to turn crucial parameters of KELM to enhance diagnosis accuracy. Finally, practical samples are used to assess fault diagnosis performance of the presented method. Experimental results indicates the proposed RF-KELM method is capable of providing higher diagnosis accuracy than conventional approaches, which indicates promising future.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116491595","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}
FACTS can improve the transmission capacity of the power system with a high ratio of renewable energy, lower the loss of the whole system, and handle the modern power system's continually increasing power demand. As a new FACTS device, IPFC has the function to regulate multiple lines' power flow As a brand-new FACTS component, IPFC can control multiple lines' power flow simultaneously. To make IPFC control the power flow of key lines efficiently, based totally on the power flow entropy (PFE) theory, the power flow transfer entropy (PFTE) and the power flow distribution entropy are proposed as the IPFC location and capacity determination indexes to determine the IPFC key control lines after the power flow transfer of the system and optimize the IPFC control strategy, alleviate the heavy load phenomenon of power flow of the line, improve the capacity utilization rate of the transmission line, and balance the power flow distribution of the system. The power flow injective analysis model is used in the IEEE standard 118 bus system.
{"title":"The Interline Power Flow Devices Location Selection Method Based on Novel Indexes","authors":"Zheng Li, Yuqiao Jia, Dajiang Wang, Jingbo Zhao, Ke Xu, Bing Xie","doi":"10.1109/ACFPE56003.2022.9952267","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952267","url":null,"abstract":"FACTS can improve the transmission capacity of the power system with a high ratio of renewable energy, lower the loss of the whole system, and handle the modern power system's continually increasing power demand. As a new FACTS device, IPFC has the function to regulate multiple lines' power flow As a brand-new FACTS component, IPFC can control multiple lines' power flow simultaneously. To make IPFC control the power flow of key lines efficiently, based totally on the power flow entropy (PFE) theory, the power flow transfer entropy (PFTE) and the power flow distribution entropy are proposed as the IPFC location and capacity determination indexes to determine the IPFC key control lines after the power flow transfer of the system and optimize the IPFC control strategy, alleviate the heavy load phenomenon of power flow of the line, improve the capacity utilization rate of the transmission line, and balance the power flow distribution of the system. The power flow injective analysis model is used in the IEEE standard 118 bus system.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114928425","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 : 2022-10-01DOI: 10.1109/ACFPE56003.2022.9952302
Ningning Li, Jilong Zhang, Chen Ling, Jianlong Zou
At present, the impedance analysis method has been widely used in the stability mechanism analysis of the interactive system between grid connected inverter and power grid. Considering the influence of frequency coupling, the positive and negative sequence impedance is no longer decoupled, and the generalized nyquist criterion needs to be used for analysis, which makes the system analysis complex. Based on this, this paper first modifies the impedance matrix to realize the equivalent transformation from multiple input multiple output (MIMO) impedance matrix model to single input single output (SISO) impedance model. Secondly, for the equivalent SISO system, the nyquist stability criterion is used in the frequency domain to analyze the influence of the system short-circuit ratio, PLL bandwidth, current loop bandwidth and other parameters on the system stability. Theoretical analysis and simulation results show that the system short-circuit ratio increases, the PLL bandwidth decreases, the current loop bandwidth increases, and the system stability improves. Finally, the correctness of impedance model and theoretical analysis is verified by time domain simulation.
{"title":"Sequence impedance modeling and stability mechanism analysis of three-phase grid-connected inverter considering frequency coupling","authors":"Ningning Li, Jilong Zhang, Chen Ling, Jianlong Zou","doi":"10.1109/ACFPE56003.2022.9952302","DOIUrl":"https://doi.org/10.1109/ACFPE56003.2022.9952302","url":null,"abstract":"At present, the impedance analysis method has been widely used in the stability mechanism analysis of the interactive system between grid connected inverter and power grid. Considering the influence of frequency coupling, the positive and negative sequence impedance is no longer decoupled, and the generalized nyquist criterion needs to be used for analysis, which makes the system analysis complex. Based on this, this paper first modifies the impedance matrix to realize the equivalent transformation from multiple input multiple output (MIMO) impedance matrix model to single input single output (SISO) impedance model. Secondly, for the equivalent SISO system, the nyquist stability criterion is used in the frequency domain to analyze the influence of the system short-circuit ratio, PLL bandwidth, current loop bandwidth and other parameters on the system stability. Theoretical analysis and simulation results show that the system short-circuit ratio increases, the PLL bandwidth decreases, the current loop bandwidth increases, and the system stability improves. Finally, the correctness of impedance model and theoretical analysis is verified by time domain simulation.","PeriodicalId":198086,"journal":{"name":"2022 Asian Conference on Frontiers of Power and Energy (ACFPE)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130619898","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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