MEDIUM VOLTAGE UNINTERRUPTIBLE POWER SUPPLY

摘要

A medium voltage uninterruptible power supply system is presented. The system includes a first power converter coupled between a first bus and a second bus. Furthermore, a second power converter operatively coupled to the first power converter via the first bus and the second bus, where the second power converter includes at least three legs, where the at least three legs include a plurality of switching units, and where the plurality of switching units includes at least two semiconductor switches and an energy storage device. Additionally, system includes a direct current link coupled between the first bus and the second bus. Also, system includes an energy source coupled to the second power converter, the direct current link, or a combination thereof via one or more of a third power converter, a transformer, and a fourth power converter. Method of operating a medium voltage uninterruptible power supply system is also presented.

主权项

1. A medium voltage uninterruptible power supply system, comprising:
a first power converter operatively coupled between a first bus and a second bus; a second power converter operatively coupled to the first power converter via the first bus and the second bus, wherein the second power converter comprises at least three legs, wherein the at least three legs comprise a plurality of switching units, and wherein the plurality of switching units comprises at least two semiconductor switches and an energy storage device; a direct current link operatively coupled between the first bus and the second bus; and an energy source operatively coupled to the second power converter, the direct current link or both the second power converter and the direct current link via one or more of a third power converter, a transformer, and a fourth power converter.