串联补偿电容器不平衡电流增大原因分析  

Reason Analysis of Increasing Unbalanced Current of Series Compensation Capacitor

作　　者：周晋[1] 

机构地区：[1]中国南方电网有限责任公司超高压输电公司百色局,广西百色533000

出　　处：《广西电力》2016年第6期70-72,76,共4页Guangxi Electric Power

摘　　要：背靠背直流运行方式下大量谐波涌入电网,对交流输电系统中的一些重要设备产生重大影响。针对一起串联补偿电容器不平衡电流增大导致的跳闸故障,通过对日常监测数据及相关波形进行分析,发现线路电流中存在大量的谐波分量,判断电容器不平衡电流增大是由于谐波分量叠加造成的。为了防范此类故障再次发生,提出了相应的防范措施。A large amount of harmonics flow into power grid under the back to back HVDC operation mode which have significant influences on some important devices in AC transmission system. Aiming at a trip fault caused by the increasing unbalanced current of series compensation capacitor, it is found that there are large amount of harmonics in line currents by analyzing daily monitoring data and relevant waveforms, and it is judged that the increasing unbalanced current is because of the superposition of harmonic components. Corresponding precaution measures are proposed to prevent similar fault from happening again.

关 键 词：高压直流输电 串联补偿电容器 谐波 不平衡电流 

分 类 号：TM531.4[电气工程—电器] TM761