Optimal Selection of Phasor Measurement Units

Phasor Measurement Unit (PMU) is an important device for the power system operation as it provides the synchronized data required for the monitoring, protection, and control of the power system. So, to deploy the PMUs for the power system, their optimal locations are needed to be identified. This paper presents the optimal selection of PMU set from the available sets of PMUs. Firstly, it obtains all possible sets of PMUs required for the complete observability of the power system. Then, it defines four criteria such as System Observability Index (SOI), Restorable Islands Observability Index (RIOI), Critical Bus Observability Index (CBOI) and Critical Line Observability Index (CLOI) for the selection of best PMU set. Later, the Multi-Attribute Decision Making (MADM) techniques such as Analytic Hierarchy Process (AHP), Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), Preference Ranking Organization Method for Enrichment Evaluations (PROMETHEE) and Compromise Ranking Method (VIKOR) have been used for the optimal selection of PMU set. This selection has been tested on some of the IEEE test systems. The results are then compared to analyze the performance of these four methods.