Partial discharge is a pulsed discharge that occurs when high-voltage switchgear and its internal high-voltage equipment (such as PT, CT, busbars, cable joints, etc.) undergo partial discharge (PD) due to insulation faults. During the PD process, phenomena such as pulse currents, electromagnetic waves, ultrasonic waves, light, ozone, and heat are often associated with physical or chemical processes. These phenomena can lead to chemical reactions, decomposition, corrosive substances, and the destruction of the insulation layer. Additionally, temperature rise and insulation aging can occur due to the PD, which may trigger insulation breakdown.

Scheme 1 for Online Partial Discharge Monitoring includes the PD_TA type wireless intelligent partial discharge sensor, PD_R type partial discharge data receiver, and PD_SR type online partial discharge monitoring system. The three products in this scheme can achieve discharge monitoring, data collection, and data analysis for switchgear. The PD_TA type wireless intelligent partial discharge sensor utilizes ground electrical waves and ultrasonic partial discharge sensors to detect partial discharge signals during the operation of electrical equipment, thereby determining the presence of insulation defects within high-voltage electrical equipment and providing early warnings.