特高压网架背景下内蒙古电网限制短路电流措施研究

Research on Measures to Limit Short-Circuit Current of Inner Mongolia Power Grid Under Background of UHV Grid Structure

结合内蒙古电网的现状及特高压网架背景下内蒙古电网短路电流的发展情况,分析了目前限制短路电流的主要技术路线及措施,并对各种措施对于内蒙古电网的适用性进行了初步判断。在此基础上,选取优化网架结构作为限制内蒙古电网短路电流的主要措施,对特高压变电站接入方案及网架结构进行优化和局部加强后,最终形成以包头特高压、鄂尔多斯特高压、清水—乌兰察布特高压为中心的供电区域,构建以特高压变电站为支撑的1000 kV环网结构,为内蒙古电网短路电流限制措施的实施奠定基础。

Combined with the current situation of Inner Mongolia power grid and the development of short-circuit current of Inner Mongolia Power Grid under the background of UHV power grid,the main technical routes and measures to limit short-circuit current are analyzed,and the applicability of various measures for Inner Mongolia power grid is compared.On this basis,optimized grid structure is selected as the main measure to limit the short-circuit current of Inner Mongolia power grid.After the optimization and local reinforcement of UHV substation access scheme and grid structure,three 1000 kV power supply areas are finally formed with Baotou UHV,Ordos UHV and Qingshui-Ulanqab UHV as the center,and a 1000 kV ring network structure supported by UHV substation is constructed,which provides technical support for limiting short circuit current in Inner Mongolia power grid.