Abstract
When single-phase grounding fault occurs in high-voltage transmission line, secondary arc current and recovery voltage must be suppressed in order to ensure that single-phase autoreclosing operates reliably and successfully. This paper adopts the suppression measure of secondary arc current - shunt reactor with neutral small reactor-which is applied widely in many countries, and then uses PSCAD software to simulate suppression effect about different fault point locations toward an example of 500 kv double-ended sources high-voltage transmission line. According to the simulation results, suppression effects about different locations are distinct. Moreover, this measure can suppress secondary arc current effectively, ensure success of single phase autoreclosing operation and finally achieve security and stability of power system.
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