WANG LING-HAI, WANG HUI. Protection on Differential Current Bridge of Shunt and Filter Capacitor Installation on 110kV and above System. [J]. Power capacitor & reactive power compensation, 2005, (1): 24-28.
WANG LING-HAI, WANG HUI. Protection on Differential Current Bridge of Shunt and Filter Capacitor Installation on 110kV and above System. [J]. Power capacitor & reactive power compensation, 2005, (1): 24-28.DOI:
110kV及以上并联及滤波电容器装置桥差保护
摘要
介绍了电容器内部故障保护方式大多采用桥式差流保护公式的推导过程及求解方法
并通过计算实例分别求出元件故障击穿被隔离后
同一串联段完好元件的过电压倍数、故障电容器的过电压倍数及不平衡电流值
为产品运行提供参照。最后给出了求解的计算程序。
Abstract
This paper introduces the deduce process and resolvent method of the protection formula of the differential current bridge which is adopted mostly to protect the internal fault in power capacitor. Through a practical example
the multiple of the overvoltage both in healthy elements and in fault elements is calculated respectively. Meanwhile
the unbalance current in fault elements is also obtained. Finaly
the resolvent procedure is given.
关键词
直流输电并联滤波电容器装置桥差保护
Keywords
HVDCShuntFilter capacitor installationsBridge differential current protection