Design of Ultrasonic-Based Remote Distribution Network Online Security Monitoring Device

The scale of the power grid and the degree of informationization and intelligence of the power equipment are increasing, and the end devices and users are becoming more diversified and complex, which makes higher requirements on the stability and security of the electrical system. On the other hand, the facilities of the power grid system are widely distributed, and the relevant equipment is deployed in a more dispersed manner, which puts forward higher requirements on the real-time and remote nature of the security monitoring means of the distribution network. In this paper, through the analysis of the components of ultrasonic-based online security monitoring system, especially based on the mechanism of partial discharge and the mechanism of action between partial discharge and ultrasonic waves, the online security monitoring device of partial discharge is designed. The system contains operation modules including acquisition, amplification, filtering and processing of partial discharge signals. The simulation results show that the proposed device may improve the identification efficiency and the anti-interference capability.