一起因500 kV线路传输功率过大而导致线路同频并网失败案例分析

Case Analysis of Same-frequency Paralleling Failure Caused by Excessive Transmission Power of 500 kV Line

摘要:

文中通过分析某大型水电站在单条500 kV送出线路带大功率情况下，另一条线路同频并网失败的案例。简要地分析了影响同频并网的因素以及正在运行线路传输功率与同频合闸相角差之间关系，进而提出解决大功率同频并网失败的措施。

Abstract:

In the case of a single 500 kV transmission line with high power, the same-frequency paralleling failure of another line is analyzed. The factors affecting the same-frequency paralleling are briefly analyzed as well as the relationship between the transmission power of the running line and the phase-angle difference in the same-frequency switching, and then the measures to solve the same-frequency paralleling failure with high power are put forward.