摘要
云南电网与南方电网异步联网运行期间若发生直流单、双极闭锁故障,电网将出现大量富余功率,严重时可引起电网频率失稳,导致大面积停电事故。因此,分析实际运行过程中发生的直流闭锁故障、研究并制定相应的措施对电网安全稳定运行具有重要意义。本文针对电网实际发生的“8·21”金中直流单极闭锁故障,分析了异步运行期间直流单极闭锁对云南电网频率、电压以及功角稳定性的影响。在此基础上,通过仿真分析了直流自启动对系统稳定性的影响。根据小干扰分析,找出了参与低频振荡的相关机群,并提出了相应的解决措施。
Sometimes mono-polar or bi-polar block faults happen in asynchronous interconnection between Yunnan Power Grid and the main power gird of China Southern Power Grid.There will be lots of surplus power which may seriously result in power grid frequency instability and large scale blackout.Therefore,it is significant for power grid’s safe and stable operation to analyze and make specific measures for mono-polar block faults which happen in actual operation process.This paper focused on“8.21”Jin-Zhong HVDC system mono-polar block fault which happened in actual operation process.And the effects of mono-polar block fault on Yunnan Power Grid’s frequency,voltage and power angle stability were analyzed.The effect of HVDC self start on power system stability was analyzed by simulation.According to small signal stability analysis results,generators participated in low frequency oscillation were picked out and specific measures were proposed.
作者
杨明亮
张丹
刘旭斐
张杰
黄润
曾丕江
吴晓刚
Yang Mingliang;Zhang Dan;Liu Xufei;Zhang Jie;Huang Run;Zeng Pijiang;Wu Xiaogang(Yunnan Power Grid Dispatching and Control Center,Kunming 650011,China)
出处
《云南电力技术》
2024年第1期84-88,共5页
Yunnan Electric Power
关键词
直流闭锁
频率
电压
稳定性
自启动
低频振荡
block fault
frequency
voltage
stability
self start
low frequency oscillation
