Simulation Analysis to Investigate Reasons for Failure of Neutral Grounding Reactor

In Power System to fit the developing power demand, a number of extra high voltage (EHV) transmission lines is being combined to the network, which raises the complexity of power system network. It is important duty of the power system operator to diminish the power outage due to temporary faults so as to maintain stable and reliable power system network. Most of the transmission faults are temporary in nature. In EHV lines Neutral Grounding Reactors (NGRs) are used for successful operation of SPS (Single Pole Switching) by secondary arc extinction. IEEE and CIGRE propose protection system for high voltage shunt reactor. The recommendations do not accommodate guideline for protection of neutral grounding reactors and their causes of failure. This paper includes the simulation analysis to investigate the reasons/causes for failure of Neutral Grounding Reactors(NGR). An analysis carried out on a real power system including Steady state and Transient analysis using MATLAB.