Multi-level voltage control partitioning based on multi-objective modularity
Song Yu · Dianli zidonghua shebei · 2015
A definition of electrical distance for measuring the coupling degree of var source control and an index of multi-objective modularity for evaluating the partitioning quality are proposed,based on which,a tristage method of multi-level network partitioning is developed. In the coarsening stage,the dimensionality of clustering data is reduced to lower the problem scale;in the partitioning stage,an optimal scheme considering both intra-regional controllability and inter-regional decoupling performance is obtained by the agglomerative clustering based on the multi-objective modularity index;and in the refining stage,the boundary nodes are adjusted to further optimize the partitioning scheme. The connectivity among sub-regions is guaranteed in the calculation process. Case study shows that,the high-quality partitioning scheme proposed by the developed method is applicable to the network partitioning of large-scale system for voltage control,verifying its correctness and feasibility.