Observability analysis and optimal placement of PMU using Differential Evolution algorithm

Abstract

Power system state estimator uses the set of available measurements in order to estimate the state of the system. For the given measurements, the network observability analysis will determine if a unique estimate can be found for the system state. Network observability analysis can be performed using either numerical or topological approaches. In this paper optimal number and location of phasor measurement unit is performed using Differential Evolution algorithm. In addition single phasor measurement unit loss is also considered. To verify our proposed approach, simulations on 6-bus test system and IEEE 14-bus, 30-bus, 57-bus and 118-bus system are performed.