An Optimal PMU Placement Against N-1 Contingency of PMU Using Integer Linear Programming Approach

Phasor Measurement Unit is a time synchronized metering device that gives very fast and accurate data of voltage and current magnitudes and angles for monitoring and control of power system. As cost of PMU procurement and installation is high, optimal placement of PMUs is critical. In this paper, Binary Integer Linear Programming is used to find optimal locations of PMUs for complete system observability under N-1 PMU contingency. The placement algorithm is tested on seven test bed systems. Optimal Placement Problem is formulated for New England 39 Bus system. Results are also verified for IEEE 14, 30, 57, 118, 145 and Polish 2383 bus systems. The simulation results show that the proposed algorithm gives the optimal location of PMUs in the power system by keeping complete system observable.