The number of switch cabinet in power system is huge,and its insulation performance is related to the safe and reliable operation of power system.In order to overcome the problems that traditional manual identification methods of partial discharge in switch cabinet were inefficient and inaccurate,a rapid pre-diagnostic method of par-tial discharge in switch cabinet based on audible-signal was proposed.The method included collecting on-site audio signals,and eliminating the affect of power-line noise by pre-emphasis,sub-framing and filtering.A partial discharge identification model with short-term energy parameters as the status label was constructed.Field experiment showed that the rapid pre-diagnostic method for partial discharge in switch cabinet based on audible-signal had the advanta-ges of less time and high recognition accuracy,which was of great significance for improving the patrol inspection ef-ficiency of switch cabinet and strengthening the monitoring level of power equipment insulation.
维普
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