摘要
通过理论推导阐述了带有并联电抗器的线路合闸时,断路器电流直流分量的产生机理和影响因素,建立起基于实际线路参数的500 kV德宏博尚I回输电工程PSCAD模型,仿真计算并分析合闸电阻、串联补偿装置、合闸相位、并联电抗器投入情况对空载合闸操作时线路电流直流分量的抑制效果,提出可实施的抑制并联补偿线路断路器直流偏置的措施。
DC component in current of circuit breaker and its influencing factors during transmission line closing operation are ana- lyzed in this paper. Based on the parameters of 500 kV Dehong - Boshang I transmission line, PSCAD over - voltage simulation model is built. The extinction effect from closing resistor, Series compensation, closing phase and parallel compensation degree to DC component in current of circuit breaker are simulation calculated. Based on this, reasonable measures for preventing the failure risks of circuit break brought by DC offset are put forward.
出处
《云南电力技术》
2014年第1期82-85,105,共5页
Yunnan Electric Power
关键词
直流偏置
并联电抗器
断路器
空载合闸
合闸电阻
DC offset
shunt reactors
circuit breaker
no -load closing
closing resistor
