串补保护电容器不平衡告警分析及解决措施  

Analysis and Solutions of the Capacitor Imbalance Alarm in Series Compensation Protection

作　　者：孙华[1] 黄佳胤[2] 莫世真[1] 王德昌[3] 

机构地区：[1]中国南方电网超高压输电公司柳州局,广西柳州545006 [2]中国南方电网电力调度控制中心,广州510623 [3]南京南瑞继保电气有限公司,南京211102

出　　处：《南方电网技术》2013年第2期130-134,共5页Southern Power System Technology

摘　　要：为解决500 kV山河乙线串补电容器不平衡告警故障,通过进行动模试验和仿真试验验证,发现低通滤波器的截止频率较高、电容器电流高次谐波含量大而引起电容器不平衡电流增大是电容器不平衡告警的主要原因,可通过降低低通滤波的截止频率以及增加不平衡电流互感器抗干扰能力等措施去解决该问题。To solve the series compensation capacitor imbalance alarm failures in 500 kV Dushan-Hechi Line B, dynamic model test and simulation verification are carried out, and it is found that the higher cut-off frequency of the low-pass filter, and the large content of high order harmonic wave of the capacitor current are the main reasons causing the increase of the capacitor unbalance current, leading the capacitor imbalance alarm. By reducing the low-pass filter cut-off frequency and increasing the current transformer＇s anti-interference ability for imbalance current, the problem can be settled.

关 键 词：串补电容器 告警 故障分析 解决措施 

分 类 号：TM531.4[电气工程—电器]