Single-phase emergency operation of a three-phase inverter and corresponding inverter having a polyphase to single phase changeover operation

摘要

A method for converting DC power from a source into AC power by means of an inverter which includes three bridge branches, each having a phase output, is described. During grid-connected operation, the bridge branches are actuated in such a way that the AC power is fed, as three-phase grid-compliant power, into a grid. During emergency operation of the inverter, the AC power is provided as single-phase island grid by two of the three bridge branches at the phase outputs thereof, wherein the inverter is disconnected from the grid.

主权项

1. A method for converting DC power from a source into AC power by means of an inverter (1) comprising three bridge branches, each having a phase output, wherein, during grid-connected operation, the bridge branches are actuated in such a way that the AC power is fed, as three-phase grid-compliant power, into a grid, wherein
by operation of two of the three bridge branches, the AC power is provided, as a single-phase island grid, at two of the three phase outputs when the inverter is disconnected from the grid.