Partial discharge detection sensitivity testing device and method for large-section long high-voltage cable

• Main Authors: DENG XIANBO, QI JINLONG, ZHANG ZHIJIAN, XU JUN, HE GUANGHUA, GU ZHIQIANG, PU SHILIANG, LI YE, BIAN DONG, FU SONGLIN
• Format: Patent
• Language: Chinese; English
• Published: 27.08.2021
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a partial discharge detection sensitivity testing device and method for a large-section long high-voltage cable. The partial discharge detection sensitivity testing device comprises a high-voltage power supply module, a calibration module, a sample module and a detection module. The high-voltage power supply module outputs high-voltage sine alternating current with an adjustable amplitude U. The calibration module is used for generating a calibration pulse for setting the discharge capacity and comprises a calibration capacitor and a step voltage generator; the step voltage generator is connected with the high-voltage power supply module in parallel and outputs a step voltage signal with the amplitude U0; and one end of the calibration capacitor is connected with the step voltage generator, and the other end of the calibration capacitor is connected with the sample module. The detection module is used for partial discharge detection, a grounding lead of the sample module is connected i