基于电力电容器C值监测的新型故障预警技术  

New fault early warning technology based on C value monitoring of power capacitor

作　　者：梁东 咸日常[1] 崔聪 刘兴华 张万征 鲁尧 LIANG Dong;XIAN Richang;CUI Cong;LIU Xinghua;ZHANG Wanzheng;LU Yao(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255049,China;Zibo Power Supply Company of State Grid Shandong Electric Power Corporation,Zibo 255032,China;Shandong Zhiyang Electric Co.,Ltd.,Zibo 255086,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255049 [2]国网山东省电力公司淄博供电公司,山东淄博255032 [3]山东智洋电气股份有限公司,山东淄博255086

出　　处：《现代电子技术》2020年第21期122-126,共5页Modern Electronics Technique

基　　金：国家重点研发计划项目(2016YFB0901303);国家电网公司科技项目(SGSDZBOOJS1800295)。

摘　　要：理论研究和运行实践表明,电力电容器成套装置的运行故障率明显高于其他变电设备。为实现电力电容器的故障预警,通过从母线侧电压互感器获取电压信号、回路电流互感器获取电流信号,研究电力电容器电容量C值监测的新型技术方案,确定其预警阈值。并通过监测成套装置消耗的有功功率以甄别串联电抗器是否存在故障,保证了电容量C值监测的精度。运用电磁暂态仿真软件ATP-EMTP对电力电容器故障进行了仿真。仿真及现场应用表明:提出的电容量C值在线监测技术能准确有效地对电力电容器故障进行预警,克服了现有监测方案受放电元件选型的限制,具有接线简单、适用范围广等优点。The theoretical research and operation practice show that the failure rate of power capacitor assembly is obviously higher than that of the other substation equipment.In order to realize the fault early warning of power capacitors,a new technical scheme for monitoring capacitance C value of power capacitors is studied to determine the warning threshold by getting voltage signals from the bus⁃side voltage transformer and current signals from the loop current transformer.In addition,the active power consumed by the assembly is monitored to identify the failure of the series reactor,so as to ensure the accuracy of the capacitance C value monitoring.The fault of power capacitor is simulated by electromagnetic transient simulation software ATP⁃EMTP.The simulation and field application show that the proposed technology of capacitance C value on⁃line monitoring can accurately and effectively warn power capacitor faults,and overcome the existing scheme′s monitoring limitations due to the selection of discharge components.In addition,it has the advantages of simple wiring and wide application range.

关 键 词：新型故障预警技术 电力电容器 电容量C值 成套装置 在线监测 串联电抗器 

分 类 号：TN609-34[电子电信—电路与系统] TM53[电气工程—电器]