广东电网短路电流超标问题及对策

摘要

Short-circuit current being out of limitation is an outstanding issue for the load increase and development of power grids.Analyzing the characteristics and causes of the issue in the 500 kV and 220 kV bus lines of Guangdong Power Grid,this paper gives related counermeasures for the issue in certain situations,such as distribution equipment transformation,partition of power supply in different levels,TPSC-based short-circuit current limiter for main lines,small reactance for transformer neutral,etc.%短路电流超标问题已成为制约电网负荷增长和电网发展的突出因素。分析了广东电网500 kV母线和220 kV母线的短路电流超标特性及原因,并针对不同的情况提出了对短路电流的控制措施,诸如配电装置改造、分层分区供电、关键线路加装基于晶闸管保护型串联补偿（TPSC）技术的短路电流限制器、主变压器中性点加装小电抗等。