Optimal Location of PMUs to Enhance State Estimation of Power Systems

The Wide Area Monitoring Systems (WAMs) has brought several advantages for the power system monitoring, operation, control. Recently, the introduction of Phasor Measurement Units (PMUs) to power grids played a significant role in transforming them into smart grids. However, PMUs are costly and installing PMU at each bus is feasible. Therefore, the formulation of optimal placement of PMUs (OPP) in power systems is very important to minimize the total number, while preserving the observability of the system. Newton Raphson load flow method is applied to obtain load flow results of the system. Weighted least squares WLS with PMUs approaches for the state estimation of IEEE 14 bus test case is presented. The results show more accurate state estimation process.