阳城500kV输电工程中串补装置的工作条件

Working Condition of Fixed Series Compensation in the Yangcheng 500 kV Transmission System

用电磁暂态程序 (EMTP)模拟计算了阳城 5 0 0 k V输电工程串联电容器组的工作条件。结果表明 :线路正常投入串补电容器组 ,若永久性单相接地故障点靠近电容器组时单相自动重合闸 ,则串联电容器组有可能在 0 .35 s内不能得到可靠保护 ;距三堡母线 15 9.16 km以内线路发生三相接地故障时 ,串补电容器组才可在 0 .35 s内得到可靠保护。

The working condition of series compensation capacitor bank of Yangcheng 500kV transmission line is studied. The result shows if the series compensation capacitor bank is put into operation and the single phase recloser acts when the permanent single phase grounding fault is near the capacitor bank the series compensation capacitor bank can not be protected in 0.35s. The 3 phases grounding fault occurs within 159.16km from Sanbao line the series compensation capacitor bank can be reliably protected in 0.35s.