A new algorithm for single line outage estimation

Abstract

This paper presents a novel algorithm for estimation of line outages using phasor angle measurements. In this algorithm, phasor angles obtained from load flow simulation for various outage cases and thereby simulated bus power mismatches (SBPM) are to be stored. On occurrence of actual outage, bus power mismatches are to be computed using PMU provided post outage as well as pre outage phasors. Thereafter comparison between simulated bus power mismatches and computed bus power mismatches (CBPM) is done through least square norm minimization approach to find out the actual outage case. Moreover, random Gaussian noise with zero mean and standard deviation from 1% to 5% is introduced in the proposed model to check the feasibility in real power system. Performance of the algorithm is tested on IEEE 5bus, 14 bus and 30 bus system. The simulation results show the efficiency and viability of the proposed algorithm.