330 kV与220 kV电磁环网解环研究

随着白银750 kV送变电工程的建设，白银地区750 kV、330 kV、220 kV多级电磁环网出现，这给电力生产的安全运行带来隐患。主要结合西北电网750 kV主网发展及白靖220 kV和330 kV电网的结构变化，对相应各阶段的电磁环网解环影响因素进行了详细分析论证，提出可行的方案和解决问题的措施，通过技术经济比较，给出适合电网发展、解开电磁环网的合理的方案。

Research on Breaking Mode of 330 kV and 220 kV

Along with the completion and put into service of Baiyin 750 kV project, multilevel electromagnetic loop circuits of 750 kV, 330 kV and 220 kV have been existed in Baiyin that may be not propitious for security and stability of power system. According to the network planning of Northwest China Power Grid and structure change of Baiyin 330 kV and 220 kV network, main facts of breaking mode of electro-magnetic loop circuits correspond to every stage has been studied and feasible proposal and solution has been proposed in this paper. On the basis of cost-effectiveness analysis, some reasonable proposal has been put forward for breaking the electro-magnetic loop circuits and the expansion of power grid.