Grounding scheme for modular embedded multilevel converter

摘要

A power converter includes at least one leg with a first string including a plurality of controllable semiconductor switches, a first connecting node, and a second connecting node, wherein the first string is operatively coupled across a first bus and a second bus. The at least one leg also includes a second string operatively coupled to the first string via the first connecting node and the second connecting node, wherein the second string includes a plurality of switching units. The first string includes a first branch and a second branch, wherein the second branch is operatively coupled to the first branch via a third connecting node and the third connecting node is coupled to a ground connection.

主权项

1. A power converter, comprising:
at least two legs, each leg comprising:
a first string comprising a plurality of controllable semiconductor switches, a first connecting node, and a second connecting node, wherein the first string is operatively coupled across a first bus and a second bus;a second string operatively coupled to the first string via the first connecting node and the second connecting node, wherein the second string comprises a plurality of switching units;wherein the first string comprises a first branch and a second branch, and wherein the second branch is operatively coupled to the first branch via a third connecting node;wherein the third connecting node is coupled to a ground connection; and wherein the third connecting nodes of the at least two legs are directly connected to each other.