摘要
由于电源大规模投运,750 kV乌北变电站短路电流水平严重超过了断路器额定开断能力。针对750 kV乌北变电站220 kV侧短路电流严重超标的问题,分别从电网运行方式调整、发电厂升压站采用高阻抗变压器、加装限流电抗器及变电站中性点加装限流电抗器几个方面对短路电流下降情况进行了相关分析计算,但合理的网架结构和电源装机规模是解决短路电流超标问题的最根本途径,结合远期750 kV五家渠变电站的投运对乌北片区短路电流进行了预测。该分析结果对于合理规划750 kV片区电源容量,限制电网短路电流水平具有一定的参考价值。
With a great magnitude of generators connected to the power grid,the short-circuit current of 750 kV Wubei substation far surpasses the nominal capahilily of short-circuit breaker.In order to reduce the short current,all kinds of different counter-measures are taken into consideration including the current operation scenario,high impedance transformer,limiting reactor and neutral reactor.But the most effective and radical way to limit the short current is to optimize the power network and generator capacity.At the final part,the short current limit effect of 750 kV WuBei substation considering the operation of 750 kV Wujiaqu substation in the future is forecasted.The whole analysis results are of significance for future generator capacity planning of 750 kV substation and short current reduction.
出处
《陕西电力》
2014年第6期42-45,49,共5页
Shanxi Electric Power
关键词
短路电流
限流电抗器
中性点小电抗
short-circuit current
limiting reactor
neutral reactor of transformer
