Study on the Insulation Aging Law of Switchgear Under the Synergistic Action of Electric-Wet-Thermal Multi-stress
摘要
The research on the insulation performance deterioration mechanism of switchgear insulators and the mechanical performance degradation mechanism of circuit breakers under actual working conditions is of great significance for the real-time evaluation of switchgear working status and the management, operation and maintenance of power transmission and distribution system. In this paper, the electric-wet-thermal accelerated aging test platform is established, and the accelerated aging test is carried out for the insulating parts of the switchgear which has been in service for 20 years. The insulation deterioration law and insulation failure mechanism of switchgear insulating parts under the combined action of electrical, wet and thermal factors are obtained. This paper can provide a theoretical basis for the condition evaluation of switchgear and the operation and maintenance of equipment under actual working conditions.