An efficient fault locating technique with backup protection scheme using wide area measurement for power system with simultaneous faults

Abstract

This paper presents a synchronized phasor measurement-based wide-area backup protection scheme which uses the magnitude of sequence voltages of buses at a system protection centre to identify the faulted bus closest to the fault and faulted line. The technique is tested for various faults including simultaneous faults in various systems with interconnections. The scheme is found to be accurate and fast with today’s synchronized measurement technology. Analysis using simultaneous faults is a novel contribution in this paper. It is expected that this scheme will reduce the number of disastrous blackouts and improve the reliability and security of the power system. The required information is able to distinguish between balanced and unbalanced fault in the system. The study of new back up protection scheme is done on a WSCC-3 machine-9 bus system and an IEEE 14 bus test system. The data is simulated through EMTDC/PSCAD and MATLAB /SIMULINK softwares.