超高压变电站雷电过电压现场实测与仿真计算

简述了电力系统过电压问题的研究方法:TNA具有直观性,实测具有真实性,仿真计算具有灵活性。为研究某超高压变电站雷电过电压与绝缘配合问题,用低压冲击波进行了时间比例尺、阻抗比例尺均为1的现场试验,且用ATP-EMTP仿真计算了设备上的雷电侵入波过电压。试验结果表明,一线一变、一线两变两种运行方式下,降压实测与ATP-EMTP仿真计算结果基本一致,说明将实测与计算结合起来是一种分析此类问题很好的方法。

EHV Substation Lightning Overvoltage Field Test and Simulation

This author briefly presents three kinds of research methods for the over-voltage prob-lems in the power system: TNA with the intuitionistic features,the field test with authenticity and the simulation with flexibility.To study the lightning over-voltage and insulation coordination problems in a EHV substation,the low-voltage surge is used to test in the substation and both the hour scale and the impedance scale are equivalent to one in the test,the ATP-EMTP simulation program is applied to simulate and compute the lightning intruding over-voltage in the equipments.The results of the test and the simulation are compared,and they are basically consistent,which shows the field test and the simulation both are excellent methods to such problems,and it is better to make them complementary and combined with each other.