Identification and Analysis of Abnormal Discharge Hidden Danger in Cabinet After Main Transformer Tripping and Powered up
In allusion to a main transformer tripping incident caused by differential protection action,the fault phase and fault range are determined based on the protection action,the fault recording information,the on-site equipment inspection and the main transformer related diagnostic test results.The position of the abnormal discharge hidden danger is preliminarily localized by partial discharge detection after the main transformer is powered up.The inspector goes into the switch cabinet for close inspec-tion after the main transformer is shut down,and the specific location of the fault point is determined.Finally the causes of the ab-normal discharge are analyzed,and the corrective measures are proposed.
switch cabinetfault point localizationpartial discharge detectionhidden danger
NETL
NSTL
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