The Failures Analysis of Water Circulation Cooling System in 500 kV Jing＇an Underground Substation
Water circulation cooling system is a vital part for cooling the underground transformer substation.This article describes two failures during the operation of the water circulation coolling system in 500kV Jing＇ an underground substation,which are output connection heating failure on dual-power device switching power supply,and the circulating pump trip caused by transient loss of voltage.It also gives the corresponding improvement by analysing wiring diagram and tracing the recording on fault recorder oscillograph,in order to provide some experience for the design and operation of underground substation in the future.
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