区域电网与主网解列后稳定运行分析

Simulation analysis of the fault trip of “3.30” 220kV Fu Jian line in Nujiang power grid

怒江电网处于云南电网末端,与主网联接薄弱,怒江福贡、贡山和兰坪电网经220kV福剑线和剑兰Ⅰ回线与主网相连,元件发生"N-2"或检修方式"N-1"故障易造成局部电网孤网。本文以怒江电网为背景,在220kV剑兰Ⅰ回线停电检修期间,220kV福剑线故障跳闸怒江福贡、贡山和兰坪电网独立网运行期间高频切机和低频减载的动作情况进行仿真,模拟独立网运行期间的频率变化曲线,提出怒江电网高、低周措施的优化方案,对于后续保证怒江电网的安全稳定运行有重要意义。

Nujiang grid of River in Yunnan power grid at the end, and weak power grid connection, Nujiang Fugong and Gongshan and Lanping grid is connected via 220kV Fu sword line and Gladiolus I loop and power grid, components ＂n-2＂ or maintenance mode ＂n-1＂ fault is easy to cause local isolated grids. The in the network of the Nu River as the background, during the 220kV Gladiolus I loop maintenance outage, 220kV Fu sword line fault tripping Nujiang Fugong, Gongshan and Lanping grid independent network during the running of the high-frequency cutting machine and low frequency load shedding the action simulation simulation of frequency variation curve of net independence during the operation, the Nujiang grid high - and low cycle measures optimization scheme, for the follow-up to ensure the safe and stable operation of Nujiang grid has important significance.