Metallized film capacitor has higher operating voltage and energy storage density and

at present

is used widely in renewable energy power systems. However

these application scenarios pose higher requirements for the performance of metallized film capacitor in complex environment. As the core element

the electrical performance of dielectric film is directly related to such important parameters as the with-stand voltage level and energy storage density of capacitor. The existing measurement standards only measure the conductivity of dielectric film at room temperature

lacking measurement methods for the impact on dielectric film in complex environments. As for the application scenario of capacitor in converter valves in this paper

an experimental platform for measuring the conductivity of dielectric film in multiple physical fields is set up

the environmental range of working conditions is simulated and expanded

electrical

thermal and mechanical environments are applied on the dielectric film and the leakage current is measured accurately. The research results can provide guidance for the modification of dielectric film performance.