山西北部500kV电网短路电流限制措施研究

Study on limiting measures of short-circuit current of 500kV power grid in northern Shanxi

近年来,随着山西省内电力系统的快速发展,逐渐形成了以500k V为主要电压等级的"三纵四横"坚强电网格局。电网规模的逐年扩大及其构架的日益复杂,在加强电网的同时,也使得短路电流水平逐年攀升,局部电网尤其是山西北部500k V电网的短路电流水平超标已成为一个突出问题,影响到电力系统运行的可靠性。基于此,本文从研究局部电网的短路电流超标问题出发,拟利用几种不同的措施来限制降低短路电流水平,相关的研究结论可以为电网的安全稳定运行提供一定的借鉴意义。

In recent years,with the rapid development of power system in Shanxi Province,a ＆quot;three horizontal and four vertical＆quot; strong power grid pattern of mainly 500kV voltage level is gradually formed.Being larger and more complex,the power system is actually strengthened,which also leads to the increasing level of short-circuit current.Exceeding the standard of short-circuit current of local power grid,especially in northern Shanxi 500kV power grid,has become an outstanding problem,which affects the reliability of power system operation.Based on the study of short-circuit current exceeding problem in local power grid,in this paper,several different measures to reduce short-circuit current level was discussed and analysed.The related research conclusions can provide some reference for the safe and stable operation of power system.