2012•Electrical AutomationRequires access

The Characteristic of Voltage Sag by High Voltage Line Fault and the Effect to Sensitive Load Equipment

Ran Jianghong

Abstract

220kV transmission line as a major regional grid transmission line,failure will produce voltage sag,whose domain and effect are wide.Through statistical analysis of protection equipment,relay protection action and failure status of 220 kV transmission line,finding out the characteristics of voltage sag,using relayCAC software for fault simulation,the simulation results and the fault wave recording device of electrical information data find out the difficulties to eliminate voltage sag from Grid side.Also investigating the effect of voltage sag to sensitive load of regional grid,find out the action for reducing the effect of voltage sag from load side.

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Key concepts: Voltage sag, Fault (geology), Transmission line, Voltage, Engineering, Relay, Line (geometry), Electrical engineering