Adaptive distance protection to prevent mal operation with STATCOM on a transmission line

Abstract

This paper planned associate adaptive algorithm setting for distance protection relay to stop mal operation for transmission line with presence of static synchronous compensator (STATCOM). With STATCOM in transmission line will improve power transferability and power system controllability but it brings some challenge to the protection schemed especially distance protection. Adaptive distance method able to overcome the under-reaching or over-reaching by conventional distance characteristics. The effect of STATCOM on distance protection for various type of fault, such as single phase fault, phases to phase fault and STATCOM installation locations will be investigate. The power system and STATCOM with controller are modelling using PSCAD/EMTD software. The simulation result shows the effect STATCOM on conventional distance relay unable fulfil the protective duties during the fault condition. Therefore, adaptive distance protection is required to overcome the situation.