摘要
本文用EMTP程序计算了500kV串补输电线路的操作过电压,分析计算了故障地点不同、串补度不同、加装500kV氧化锌避雷器和有、无合闸电阻的情况下串补电容对操作过电压的影响,还校验了避雷器的通流容量;构成了氧化锌非线性电阻的伏安特性曲线,本文提出了限制输电线路操作过电压的措施.
In this paper, the operation overvoltages of a 500kV transmission line with series capacitor compensation are calculated by EMTP programs, and analysis of the effects of series capacitor compensation on operation overvoltage is made. The calcultions and analyses are given under such occasions as different compensation, different location in which the faults are present, on-resistor present or absent, 500kV ZnO lightning arrester are installed, etc. The capacity of cirulation of arrester in also verified. The ovlt-ampere characteristic curve of the ZnO non-linear resistance is made. This paper provides measures to limit the operation overvoltages of the transmission line.
关键词
EMTP程序
输电线路
操作过电压
Power system computation
transmission line
series capacitor compensation
switching overvoltage
EMTP programs
