Metallized capacitors are widely used in VSC-HVDC transmission field due to such features of the metallized film as self-healing property

high operating field strength and high energy density. The key to the quality of its elements is in the the accuracy of the winding process

with the control of winding tension in particular

which will directly affect the interlayer contact condition and the radial pressure distribution of the film. Insufficient tension can lead to looseness between layers and introduce air gaps

while excessive tension can damage the film and affect the self-healing performance. Staring from the tension adjustment in this paper

the influence mechanism of the winder on the element structure and self-healing characteristics is analyzed

and the concept of interlayer pressure is introduced to explore its influence on self-healing performance

providing theoretical basis for optimizing design and setting process parameters.