The design and simulation of frequency division filter for switchgear partial discharge detection

Abstract

Partial discharge (PD) will do harm to electrical equipment, and consequently equipment insulation will age, degrade, and which is the sign of the degradation of the integrity of the equipment insulation. The degradation of insulation seriously affects the reliability of the equipment, and even affects the reliable operation of the entire grid. Study of PD detection and diagnosis for Electrical equipment is of very important scientific significance and practical value. Ultra high frequency method (UHF), with a strong anti-interference of the noise, is an excellent method of PD detection, and the energy characteristics of the signal analysis, eliminating the need for a high-speed digital card, simplifies complexity of design and saves cost to ensure reliability. Therefore, the paper is based on the UHF detection and extraction of the characteristics of PD energy method, using ADS computer-aided software to design a microwave filter which can divide the frequency of the PD signal, building the foundation for the next step to extract the energy characteristics of the various bands of the signal.