摘要
文章研究了真空断路器相控精度与容性关合涌流幅值及频率的数值关系。并基于PSCAD仿真模型,采用最小二乘拟合的方法,从工程应用角度给出了数值表达式。讨论了真空断路器容性分断不考虑重击穿条件下时断口过电压及电容器过电压情况;给出了真空断路器容性投切选相精度控制区间;提出了真空断路器容性关合角度应控制在超前目标合闸角角度区间内的观点。
This paper studies the numerical relationship between vacuum circuit breaker（VCB） phase-control accuracy and the amplitude as well as frequency of capacitive closing inrush current. And the least squares fitting method is applied to present the numerical expression which based on the models of PSCAD from the point of engineering application. In this paper, the situation of fracture overvoltage and capacitor overvoltage on the condition of VCB capacitive interruption without considering re-strike is proposed and the area of phase-control accuracy of vacuum circuit breaker capacitive switching is provided. The point that VCB phase-control degree should be limited in the area prior to the closing target point is suggested.
出处
《高压电器》
CAS
CSCD
北大核心
2016年第2期160-165,共6页
High Voltage Apparatus
关键词
真空断路器
选相精度
容性关合
涌流
VCB
phase-control accuracy
capacitive closing
inrush current
