Optimal PMU placement using Fuzzy Logic and WAMS based PMU measurement for Faulted Zone Identification

Abstract

Impediments of Traditional backup protection schemes like 1).relying on local measurements which may mal operate during stress condition and may not be able to discriminate properly between the abnormal and faulty condition,2).restriction under heavy loading condition, 3).miscommunication between different protection zones which may led to cascading tripping over emphasise the Power System Engineers to think on Backup Protection scheme. The issues related to conventional protection scheme can be resolved by using an adaptive wide area backup protection scheme (WABPS) based on Phasor measurement units (PMU) measurements. In this paper we have proposed a Fuzzy logic based method for optimal PMU placement and backup protection scheme relying on Wide Area Monitoring Systems (WAMS) based PMU measurement for identification of faulted Backup Protection zone (BPZ). Numerous case studies have been presented like base case optimal PMU placement and line contingency PMU placement with application to WSCC 9 Bus system for validation purpose.