宁夏电网电磁环网解环时序分析

随着宁夏 750 kV 电网的快速发展,形成大量 750/330/220 kV 电磁环网交叉供电,造成电网主网架结构不清晰、重要输电通道输送能力受阻、实际运行问题增多。为解决潮流控制复杂、短路电流超标、网损增加、继电保护和安全自动化装置复杂等问题,结合宁夏 750 kV 电网规划,开展宁夏电网 750/330/220 kV 电磁环网解环策略研究,提出电磁环网解环的时机、原则和解环方案。结果表明:电磁环网解环方案使宁夏电网安全稳定经济运行能力得到提高,为宁夏电网的规划和发展提供了参考依据。

Analysis on the time sequence of electromagnetic loop network breaking up for Ningxia power grid

With the fast development of Ningxia 750 kV power grid,forms largely 750/330/220 kVelectromagnetic loop network crossing power supply,causes power grid main network structure notclearing,transmission ability of important channels suffocating,actual operation problem multiplying.In order to solve the problems such as tide control complex,short -circuit current beyond thestandard,power grid loss increase,relay protection and safe automatization device complicated, combining with layout of 750 kV power grid,researches the strategy of 750/330/220 kVelectromagnetic loop network for Ningxia power grid,puts forward the opporunity,principle andscheme of electromagnetic loop network breaking up. The result shows that research scheme of theelectromagnetic loop network breaking up to enhance ability of safe,stable and economic operation ofNingxia power grid,offering the reference gist for the plan and development of Ningxia power grid.