配电网接地故障相主动降压消弧成套装置及其现场试验  

Arc suppression device with active reduction of grounding fault phase voltage and field test for distribution networks

作　　者：卓超 曾祥君[2] 彭红海[3] 喻锟[2] 王沾[2,4] ZHUO Chao;ZENG Xiangjun;PENG Honghai;YU Kun;WANG Zhan(Guangxi Key Laboratory of Power System Optimization and Energy Technology,Guangxi University,Nanning 530004,China;Hunan Province Key Laboratory of Smart Grids Operation and Control,Changsha University of Science and Technology,Changsha 410004,China;College of Electrical and Information Engineering,Hunan University,Changsha 410082,China;Changsha Jingke Electric Power Technology Co.,Ltd.,Changsha 410004,China)

机构地区：[1]广西大学广西电力系统最优化与节能技术重点实验室,广西南宁530004 [2]长沙理工大学智能电网运行与控制湖南省重点实验室,湖南长沙410004 [3]湖南大学电气与信息工程学院,湖南长沙410082 [4]长沙精科电力技术有限公司,湖南长沙410004

出　　处：《电力自动化设备》2021年第1期48-54,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金重点资助项目(51737002);国家电网公司科学技术项目(52170217000S);长沙市科技项目(kh1901140)。

摘　　要：中性点非有效接地配电网易发生间歇性弧光接地故障,产生过电压,危及人身设备安全,甚至引发电缆通道火灾。针对该问题,提出了接地故障相主动降压消弧控制原理与技术,研发了成套装置,通过灵活调控零序电压,控制故障点电压低于故障电弧重燃电压,强迫故障电弧自行熄灭,实现间歇性弧光接地故障的不停电消除,且有效抑制过电压。通过大量实验室测试、实际变电站实测与运行,验证了接地故障相主动降压消弧技术的正确性和可行性。Intermittent arc grounding fault often occurs in neutral non-effectively grounded distribution networks,resulting in overvoltage,endangering personal and equipment safety,and even causing cable channel fire disasters.Aiming at this problem,the arc suppression control principle and technology based on active reduction of grounding fault phase voltage are proposed,and the corresponding device is developed.By flexibly adjusting the zero-sequence voltage,the fault point voltage is controlled to be lower than the reignition voltage of fault arc to force the fault arc extinguish,so the grounding fault can be eliminated without power outage and overvoltage can be effectively suppressed.Through large amount of laboratory tests,actual substation tests and operation,the correctness and feasibility of the arc suppression technology based on active reduction of grounding fault phase voltage are verified.

关 键 词：非有效接地配电网 接地故障 主动降压消弧 接地故障现场试验 

分 类 号：TM77[电气工程—电力系统及自动化]