一种改进的基于潮流定解拓扑可观测性分析方法

An Improved Topological Observability Analysis Method Based on the Solvability Condition of Power Flow

针对现有基于潮流定解的拓扑可观测性分析方法中存在的两类漏判问题,依据量测岛内未知状态量至多只有一个复电压的基本原理,以有注入量测的边界节点邻接表为对象,提出可解决两类漏判问题的系统化可观测性分析方法。该方法结合方程组局部可解的判定思想和启发式搜索算法,给出待并网虽整体不可合并但局部可合并的判别方法;通过分析存在交集的待并网可组合判断的必要条件,解决两个待并网潮流分别不可解而组合可解的判别问题。最后以15节点算例系统和一个实际电网算例验证了所提算法的有效性。

Two types of missing judgment problems currently exist in topological observability analysis based on the solvability condition of power flow.Based on the fact that there can only be one unknown state voltage parameter in one measurement island,this paper presented a method of adjacency table of boundary nodes with injection measurement that can systematically analyze and observe these missing judgment problems.The first type of missing judgment,which indicated that even the overall network was not mergeable,yet the partial network could be combined,was settled by using combination of local equations solvability and heuristic search algorithm.After analyzing the conditions and requirements of two networks with intersection that could be judged together,this paper solved the second type of missing judgment that the power flow of two unsolvable networks was solvable when combined.A 15-node case and an actual grid example were used to test the validity of the method.