Gas insulated switchgear (GIS) partial discharge calibration method and system

The invention discloses a gas insulated switchgear (GIS) partial discharge calibration method and a system. The method comprises the steps of establishing a calibration data set, and calibrating a preset position of data in the data set in a GIS; measuring an actual waveform oscillation rising time and an actual maximum amplitude of GIS actual partial discharge on the preset position; comparing the actual waveform oscillating rising time and the actual maximum amplitude with the data in the calibration data set, and carrying out calculation, so as to acquire a discharge part and strength. Specifically, the calibration method disclosed by the invention can accurately measure the calibration data set and data of actual partial discharge through a sensor on the preset position, so that defects of arranging two sensors on each GIS interval and serious error of reading head wave initial time are avoided; in later stage, the discharge part and strength are obtained by simple comparison and calculation, which is free from limitation of an atlas database and overcomes shortcomings of the existing ultra high frequency (UHF) method that pattern recognition fails to accurately provide the discharge strength. Therefore, the calibration method disclosed by the invention can accurately and effectively detects discharge part and strength of partial discharge.