Trichel Pulse Characteristics of SF6/N2 Gas Mixture Under Power Frequency Voltage

In order to explore the partial discharge Trichel pulse of SF6/N2 mixed gas, and study the development process and change characteristics of the Trichel pulse, this paper carried out partial discharge tests under power frequency voltage based on the pulse current method, and obtained test data such as the initial voltage of partial discharge, discharge amount and discharge times. It is found that the discharge amount of the Trichel pulse is positively proportional to the voltage at both ends, and positively proportional to the equivalent capacitance of the external port. Through the classic Trichel pulse discharge model, this article analyzes the development process of the Trichel pulse on the negative half cycle. It is believed that the main reason for the formation of the Trichel pulse is the electric field distortion caused by the slow migration of negative ion clouds, which causes the discharge process to occur intermittently and regularly. This study can provide a certain reference for the study of the discharge mechanism of the Trichel pulse.