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《Power System Protection and Control》 2017-14
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Reactive power analysis and novel faulty selection method in resonant grounding system

PAN Benren;SONG Huamao;ZHANG Qiufeng;XIONG Huaqiang;YU Xiaoyong;State Grid Jiangxi Electric Power Research Institute;College of Information and Control Engineering, China University of Petroleum (East China);Shengli Oilfield Shengli Power Machinery Group Co., Ltd.;Electric Power Research Institute, Guangxi Power Grid Corporation;  
Because of the incorrect polarity connection of voltage transformer and current transformer in field, faulty feeder selection based on transient reactive power direction leads to wrong easily when there is a single-phase earth fault in resonant grounding system. In this paper, the effect of the incorrect polarity connection of voltage transformer and current transformer on transient reactive power and power-frequency reactive power is analyzed. A novel method using the power-frequency reactive power to correct the transient reactive power for faulty feeder selection is proposed. The faulty feeder is the one which the corrected transient reactive power is negative. If all of the corrected transient reactive powers are positive, it is bus fault. The proposed method is independent of polarity connection of voltage transformer and current transformer, which enlarges the selection scope. The feasibility of the new method is verified by digital simulation and field fault data.
【Fund】: 国家自然科学基金项目(51477184);; 江西省电力公司科技项目(521820150014)~~
【CateGory Index】: TM862
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【Citations】
Chinese Journal Full-text Database 10 Hits
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 PAN Benren;SONG Huamao;ZHANG Qiufeng;XIONG Huaqiang;YU Xiaoyong;State Grid Jiangxi Electric Power Research Institute;College of Information and Control Engineering, China University of Petroleum (East China);Shengli Oilfield Shengli Power Machinery Group Co., Ltd.;Electric Power Research Institute, Guangxi Power Grid Corporation;;Reactive power analysis and novel faulty selection method in resonant grounding system[J];电力系统保护与控制;2017-14
2 FU Hua;ZHAO Shanying;MENG Xiangyun;School of Electrical and Control Engineering,Liaoning Technology University;;A method of small current single phase to ground fault line selection based on particle filter and SPRT[J];辽宁工程技术大学学报(自然科学版);2017-07
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