湖北电网短路电流限制措施研究

Restrictive Measures for Short-circuit Current of Hubei Power Grid

随着电网规模的不断扩大,电网联系越来越紧密,湖北电网短路电流水平日益攀升,多个站点出现超标的情况,已严重影响电网的安全稳定运行,急需研究短路电流限制措施。针对当前国内外广泛应用的限制电网短路电流的措施,结合湖北电网现状及发展规划,本文对湖北电网2015年目标网架的短路电流水平进行了仿真计算,对短路电流超标的站点进行了仿真分析。分析结果表明,母线分段运行、分层分区运行、采用高阻抗变压器、采用串联电抗器、提高断路器遮断容量等短路电流限制措施,可将湖北电网短路电流有效控制在合理水平,以保障电网安全可靠供电。

The increasing expansion of interconnected powergridin recent years has led to year-on- year rise in short-circuit current, the problem that the short-circuit current exceeded the allowed fig- ure has been the main issues of safe and stable power system operation in Hubei power grid. Com- bined with usual restrictive measure, Hubei power grid current situation and development project, based on simulated calculation, the paper finds out the efficient method to solve the problem of exces- sive short-circuit current of Hubei grid through bus partition running, power grid operation under dis- trict and voltage level classification etc.