Power converter

A power converter comprising:

• a plurality of first insulators;
• a first metal base disposed on the plurality of first insulators;
• at least one insulating frame disposed on the first metal base;
• a plurality of submodules installed on the at least one insulating frame,
• each of the at least one insulating frame including a plurality of support columns and a plurality of insulating plates which are supported by the plurality of support columns and on which the plurality of submodules are disposed,
• each of the plurality of support columns including a plurality of metal columns and a plurality of second insulators, and being disposed on the first metal base with one of the plurality of second insulators interposed therebetween,
• two adjacent metal columns among the plurality of metal columns being connected to each other by a corresponding one of the plurality of second insulators,
• the first metal base is at a floating potential,
• a plurality of metal plates;
• and
• a plurality of third insulators,
• wherein each of the plurality of metal plates is disposed between one of the plurality of first insulators and one of the plurality of third insulators.