Abstract The requirements for the stability of power system operation are becoming increasingly stringent. As a key equipment in the power system, monitoring the operation of switchgear has become increasingly important. In the work monitoring, traditional monitoring techniques can only monitor a single element separately. Therefore, this study proposes an integrated monitoring technology for passive wireless temperature partial discharge in switchgear based on ultra-high frequency technology. This study takes ultra-high frequency to monitor partial discharge in switchgear and introduces surface acoustic waves for temperature monitoring. Ultra-high frequency sensors and acoustic surface sensors are used to collect temperature electrical signals and partial discharge signals. Then, a passive wireless temperature partial discharge integrated monitoring model for switchgear is constructed. The results showed that the proposed method achieved monitoring accuracy of 94.32%, 93.14%, and 92.5% for three types of partial discharge signals. When conducting temperature monitoring, the temperature obtained by the proposed method is not significantly different from the actual monitored temperature value, indicating good stability during temperature monitoring. The above results indicate that the proposed ultra-high frequency combined with surface acoustic waves can achieve high accuracy in passive wireless temperature partial discharge integrated monitoring of switchgear.
Guo et al. (Wed,) studied this question.