Application of metallized film capacitor with self-healing capacity to power system can reduce accidents and improve safety and reliability.On this basis

the main difficulties needing to overcome is the complete breakdown due to self-healing failure and capacitance loss caused by metal layer evaporation in the self-healing process.Both of them are more related to the self-healing properties of metallized film.Power capacitor operating under AC voltage condition

compared to the pulse capacitor operating under DC voltage

possesses higher operation temperature.Therefore

it is necessary to study the self-healing characteristics of metallized film at different temperatures.Self-healing properties test platform is established

different temperatures are applied on the metallized film

the voltage and current waveform are measured by electrometric methods so to obtain self-healing voltage

self-healing current

self-healing duration and selfhealing energy.It is shown by the result that rise of temperature can make self-healing current

self-healing duration time and self-healing energy decrease.