According to an embodiment of the present invention, as a method of updating a diagnostic system for power system operation, one or more UHF sensors are disposed adjacent to a device to be measured in a power system to measure a signal in the UHF high frequency band, and to perform an artificial neural network algorithm. Determining whether to partially discharge the device to be measured using; An integrated center receiving measurement data from the one or more UHF sensors to generate learning data for the artificial neural network algorithm; A local unit receiving the learning data from the integration center and updating a weight applied to a node of the artificial neural network algorithm based on the learning data; And each of the one or more UHF sensors receiving the weight from the local unit to update the artificial neural network algorithm of each UHF sensor. It starts.
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