摘要
华东电网已逐步形成特高压大受端电网,而特高压直流闭锁故障时有发生,给电网频率安全带来较大风险,几次故障结果显示全网机组一次调频性能不能很好满足新的要求,频率跌幅超出预期。结合2015年9月19日的锦苏直流双极闭锁故障,对华东电网机组理想一次调频能力与实际响应情况作了对比分析,以浙江电网机组为例提出一次调频能力不足的影响因素,并给出了火电机组一次调频能力提升的技术需求与措施,为新的电网格局下优化机组一次调频控制策略提供参考。
The East China power grid has gradually formed a UHV （Ultra High Voltage） large receiving end grid. However, high voltage DC block faults occur occasionally, which brings high risk to the safety of power grid frequency. The consequences of some of the faults show that the primary frequency regulation performance of the units in the grid is not able to meet the new requirements, and the drop of the frequency is out of expectation. In this paper, the ideal primary frequency regulation capability and the actual response of the units in the grid are analyzed based on the DC bipolar blocking fault happened on September 19, 2015. Taking the units in Zhejiang Power Grid as an example, the factors that would affect the primary frequency regulation capability are proposed, and the technical requirements and measures for improving the primary frequency regulation ability of the thermal power units are put forward accordingly to provide reference for the optimization of the primary frequency regulation control strategy in the new power grid pattern.
出处
《中国电力》
CSCD
北大核心
2016年第11期140-144,共5页
Electric Power
关键词
特高压
受端电网
直流闭锁
一次调频
性能分析
UHV
receiving end power grid
DC blocking
primary frequency regulation
performance analysis
