基于TSP优化和潮流校核的220 kV电网远景网架构建方法

220 kV long-term goal power grid planning method based on TSP optimization and power flow checking

电网目标网架是规划方案适应性分析和电力设施布局规划的基础。220 kV电网网架结构相对复杂,电网安全可靠性要求高,目前缺乏典型的网架模式作为参考,因此如何构建安全经济的220 kV电网远景网架亟待研究。基于此,提出了一种基于TSP优化和潮流校核的220 kV电网远景网架构建方法。该方法通过变电站分群和TSP优化寻找得到220 kV网架构建的最短路径,保障了所构建网架的经济性。通过交直流潮流N-1校核确定该路径上的线路导线型号和回数,保障了所构建网架能够通过N-1安全校核,进而保障了所构建网架的安全可靠性。我国某区域电网的仿真算例结果表明,所提方法能够构建安全经济的220 kV网架,具有工程实际应用价值。

The long-term goal power grid is the basis for the adaptability analysis of the power grid planning scheme and the layout of the power facilities.The structure of the 220 kV power grid is relatively complex,and the security and reliability requirements of the power grid are high.At present,there is no typical grid model as a reference.Therefore,how to construct a safe and economical 220 kV long-term goal power grid is urgently needed for research.On this basis,a 220 kV long-term goal power grid planning method based on TSP optimization and power flow checking is proposed.This method first finds the shortest 220 kV power grid path through substation grouping and TSP optimization,ensuring the economy of the planning power grid structure,and then determines the tie-line type and number of the tie-line on the path through AC and DC power flow N−1 verification.Therefore,the planned power grid can pass through the N−1 safety check,thereby ensuring the safety and reliability of the planned power grid.The simulation results of a regional power grid show that the proposed method can construct a safe and economical 220 kV power grid and has practical engineering application value.