Network Partition and Pilot Nodes Selection for Reactive Power / Voltage Control Based on the Complex Network Theory

Abstract

Conventional network partition and pilot nodes selection methods for reactive power / voltage control are mainly based on the reactive power - voltage sensitivity, however, it is hard to regulate the balance of the reactive power in partitions and pilot nodes may over-concentrate in some regions. According to the community detection algorithm in complex network theory, an improved community modular index is proposed with the consideration of the reactive power balance degree in partitions, while the power grid is modeled as the weighted network with similarity weight. By introducing the concept of vertex degree and betweenness, a novel pilot nodes selection index is presented , which is based on the ranking of observability and controllability sensitivity and can evaluate the centrality and connection density of node. Applying the proposed index and method to IEEE 39-bus system, simulation results show the effectiveness.