Power system backup protection in smart grid using synchronized PMU

摘要

Calamity failures in power grid due to malfunction of traditional backup protection system was one of the main causes of unwanted cataract trips. The new technique based on synchronized PMU with fast communication network and GPS system for time transfer have a dynamic adaptation for back-up protection of power system. The goal of the protection scheme is to estimate a new wide area backup protection system to maintain the power system stable by isolating only faulty components from the healthy part of system. The purpose is to boost the overall effectiveness and consistency of the power structure for all power stages via significant dependence on WAPS as distributed intelligence agents with improved monitoring, control and protection capabilities of power network. Introducing the fastest and of course best technique for WAPS as synchronized Phasor measurement unit (PMU). This paper speculates recognition of fault site and protection of power system using PMU also clearance of fault. The protection scheme which is used in this paper depends on the concept of equating positive sequence quantities such as voltage and current angles for every lines connected to the bus to recognize and classify the faulted line. This paper emphasize simulation on 220 KV system by using MATLAB Simulink.