On the Potential Impacts of Extreme Low Temperature on Threshold Inception Characteristics of Negative Corona Discharge

Abstract

The potential impacts of extremely low temperature on threshold inception characteristics of negative corona discharge are straightly estimated through the numerical algorithm and the extremely low temperature experiments. First, the inception criterion models of glow and streamer corona are solved for assessing the salient characteristics of corona inception at varying temperatures. The feasibility of the inception models applied to different temperature environments has been verified with our measurements and literature experimental data. Through introducing temperature into transport properties, the primary avalanche propagation, ionization boundary, and electron distribution are simulated at two inception modes. Computational results show that the microscopic parameter of negative corona inception has a pronounced relationship with temperature. The inception voltage of the wire-plate electrode is measured in a platform with temperature adjustable. It is observed that with the decrease of temperature, the inception field and voltage increases pronouncedly in the range from −100 °C to 30 °C, which can be attributed to the rise of effective ionization and photon absorption.