内蒙古电力技术2025，Vol.43Issue(6)：75-80,6.DOI:10.19929/j.cnki.nmgdljs.2025.0078
一起66kV并联电容器装置故障原因分析
Fault Analysis of 66 kV Shunt Capacitor Device
摘要
Abstract
An investigation and analysis are conducted on an explosion fault of an unbalanced current transformer in a 66 kV shunt capacitor bank at a 500 kV substation.Through fault recording analysis,high-voltage testing of capacitors,and real-time digital simulator(RTDS)testing,the behavior and causes of the protection operation are analyzed.It is revealed that the cause of the fault is an interturn short circuit within the capacitor discharge coil,causing a short circuit in the capacitor bridge arm and subsequent explosion of the unbalanced current transformer.The investigation also points out an inappropriate selection of the unbalanced current transformer for the affected capacitor bank.The result verifies that the effectiveness of the simulation experiment and recommended explicitly defining technical parameter requirements in the technical specification document for future current transformer selection.关键词
并联电容器/不平衡电流保护/电流互感器/RTDSKey words
shunt capacitor/unbalanced current protection/current transformer/RTDS分类
信息技术与安全科学引用本文复制引用
TANG Li,WEI Bingling,YANG Zaixin..一起66kV并联电容器装置故障原因分析[J].内蒙古电力技术,2025,43(6):75-80,6.基金项目
内蒙古电力(集团)有限责任公司科技项目"新一代智能站用电源管控平台在蒙西电网的建设与研究"(2024-4-49) （集团）
