Optimal PMU Placement for the System Observability Based on System Topology Model

Abstract

In order to improve the synchronous phasor measurement unit (PMU) configuration efficiency and enlarge its application in the large-scale system, a novel PMU configuration method based on the system topology model and considering zero injection buses is proposed. This proposed method considers different cases of buses connection including leaf nodes, buses with the most and same number of connection branches and buses with two branches. For the buses with the most number of connection branches, the degree of links between buses is proposed to determine PMU placement. In addition, in the process of PMU configuration, the observable and unobservable buses are directly obtained by topology model, which avoids matrix operations and speeds up the speed. The proposed method is tested on the three systems and the results show the proposed method is correct and effective.