Performance analysis of static var compensators for distance protection of Nigerian 132-kV sub-transmission network using Matlab/ Simulink model

In this paper, the influence of Static Var Compensators (SVC) on distance relay protection when connected to sub-transmission network Nigerian 132-kV grid system is investigated. This carried out by monitoring error margin fault locator associated with protective relays SVC transmission line. The location selected such that there a common primary source power (Ikorodu-Sagamu line) and SVC, which shunt-connected device located Ikorodu bus. simulated at 33.6 km 60.4 respectively from sub-station in Matlab/ Simulink model simulation results obtained are used investigate line faults respect earth for both zones one (1) two (2) disconnected all shunt type faults. Thus, indicating under-reach over-reach characteristics relay, disconnected, while showed no or line-to-line disconnected. study show though SVCs improve quality consumers, tendency be displayed connected, introduces margins relays. Therefore, more detailed dynamic simulations recommended reducing margin.