Islanding based optimal placement of phasor measurement unit using MILP

Abstract

Reliability and stability of power system are the main concern of power industry. However, increasing demands for energy increases the risk factor due to non-linearity of the power system. Sometimes, a small disturbance may create the chain of disturbances and results in a blackout. To avoid this eventuality, intensely islanding is the key option in which some area of the power system is detached from the affected area. This paper proposed a Mixed Integer Linear Programming (MILP) based optimal placement of Phasor Measurement Units (PMUs) which provides the full observability of power system before and after the islanding of system. Maximum redundancy of the optimal number of PMUs is the additional feature of proposed method which increases the performance of state estimation. Single PMU outage case has been considered as a contingency in this paper, and the presence of zero injection buses has also been considered. All the simulations have been performed in Matlab and tested on IEEE 14-bus, IEEE 30-bus, IEEE 118-bus and New England 39-bus test systems. To check the effectiveness of proposed method, results have been compared with methods available in the literature. © 2016 IEEE.