山东电网500kV母线短路电流控制分析

Analysis of 500kV Bus Short-circuit Current Control of Shandong Power Grid

"十三·五"期间交流特高压进入山东,随着交流特高压变电站的投运,特高压周边变电站500kV母线短路电流大幅上升,引起山东境内4座变电站500kV母线三相短路电流超标,影响电网安全稳定运行。针对山东电网500kV母线短路电流超标问题,此文分析了控制短路电流的常用措施,结合山东电网实际和超标变电站的具体情况,提出通过网络结构优化控制短路电流的措施方案,以较小的经济投入,较好地解决了短路电流超标问题。

The AC ultra-high voltage enters Shandong during the ＂13th Five-Year Plan＂ period. As the AC ultra-high voltage substations are put into operation,the 500 kV bus short-circuit current of substations surrounding the ultra-high voltage greatly rises,causing the 500 kV bus three-phase short-circuit current of four stations in Shandong to exceed the standard and affecting the safe and stable operation of power grid.Aiming at the problem that 500 kV bus short-circuit current of Shandong power grid exceeds the standard,this paper analyzes the common measures for controlling short-circuit current,and based on the actual situation of Shandong Power grid and the specific condition of substations exceeding the standard,it puts forward the measure and program of controlling short-circuit current through network structure optimization,which can solve the problem that short-circuit current exceeds the standard with small economic input.