500kV同塔双回线路感应电压、电流计算及实测

用EMTP电磁暂态计算程序较详尽的计算研究了500 kV淄-青-潍全线同塔双回不换位输电工程双回线路静电感应和电磁感应的电压和电流,并通过测量工程投运时的系统调试验证了工程前期的计算。通过计算其它线路结构(如紧凑型、并行和部分同塔线路)的电磁感应和静电感应得出500 kV同塔双回输电线路感应的一般特性。分析计算山东省在建的其它几条500 kV输电线路的电磁感应和静电感应得出线路接地刀闸的选型要求。

Study and Measurement of Induced Voltage and Current for 500 kV Double-circuit Line on Same Tower

In this paper the induced voltage and current are calculated by EMTP modeling calculation for the transmission project of 500 kV Zi-Qing-Wei double circuit transmission line,.Through the system testing before operation the induced voltage and current are measured to validate the results of calculation before the construction.The general characteristic of induced voltage for 500 kV transmission line is given by calculating induced voltage and current of other typical tower of double circuit transmission line.It is proved that the induced voltage of line is varied with the length and load of the line,that is one of 500 kV double circuit transmission line,when it is not compensated with high voltage reactance.The static electric induced current is proportional to length of the double circuit transmission line and the static electric induced voltage varies with the length of the double circuit transmission line.The electromagnetism induced voltage is proportional to load.