基于层次分析法的某750 kV变电站规划站址比选研究

Study on Selection of 750 kV Substation Planning LocationBasing on AHP Method

我国西北地区以750 kV电压等级构建骨干网架,尤其是新疆750 kV电网的建设,使得变电站之间的供电距离接近供电极限,高压侧/中压侧(750 kV/220 kV)级差较大,短路电流控制困难,因此,站址选择需要考虑的因素较其它电压等级更多、更复杂。文章结合新疆实际情况,分析影响750 kV变电站规划选址的六个关键因素,运用层次分析法建立评价体系模型,构建判断矩阵,对站址选择问题进行量化分析,从而获得更符合客观因素的最佳方案。

In Northwest China,the backbone grid is constructed with 750 kV voltage grade,especially the construction of Xinjiang 750kV power grid,which makes the power supply distance between substations close to the power supply limit,the high/medium(750 kV/220 kV)voltage level difference is large,and the short-circuit current control is difficult.Therefore,the factors that need to be considered in location selection are more and more complicated than other voltage grades.Combined with the actual situation of Xinjiang,this paper analyzes the six key factors affecting the planning location selection of 750 kV substation,establishes the evaluation system model with the analytic hierarchy process,constructs the judgment matrix,and carries on the quantitative analysis of the location selection problem,so as to obtain the best plan which is better in line with the objective factors.