摘要
开口三角电压保护因接线简单、元器件少、灵敏度较高,故在10kV的并联电容器保护中广泛应用。但随着电网的发展,并联电容器的大量投运,并联电容器的开口三角电压保护,易由初始不平衡引发误动作跳闸。针对此问题,从电容不均衡、三相电源电压不对称平衡和放电线圈性能差别分析了开口三角电压保护初始不平衡的影响,并在PSCD/EMTDC中进行了仿真验证,为提高实际的保护整定提供重要参考。
Because of the simple wiring, less components and high sensitivity, open-delta voltage protection is widely used in 10 kV shunt capacitors protection. With the development of the grid, a large number of shunt capacitors are put into operation in the grid, but shunt capacitor open-delta voltage protection malfunctions easily because of the initial unbalance. This paper analyzes the influence of initial unbalance of shunt capacitors open-delta voltage protection through unbalance capacitor, three-phase unbalance power voltage and the performance difference of discharge coil, and simulates by PSCD/EMTDC, which provides an important reference for the actual protection setting.
出处
《电气技术》
2014年第10期32-35,共4页
Electrical Engineering
