POLY-PHASE INVERTER WITH INDEPENDENT PHASE CONTROL

摘要

A converter system and inverter system are disclosed with individual real and reactive power control for each phase of a poly-phase system. The converter system includes a controller, bidirectional single-phase inverters with AC sides coupled to an AC line filter and DC sides connected in parallel to a link capacitor coupled to DC/DC converters. Each inverter handles a separate AC phase. The controller controls the inverters and DC/DC converters so the current amplitude of each AC phase is independent, and the phase difference of each AC phase is independent. The inverters can be galvanically isolated between the DC and AC sides. The inverters can be non-isolated inverters having line and neutral connectors coupled to an isolated transformer winding, and the output windings of the transformer can be wired in a Wye configuration. The inverters can have local controllers.

主权项

1. A bi-directional poly-phase DC/AC inverter comprising:
an AC side performing at least one of receiving and sourcing AC power, the AC power comprising a plurality of AC phases, each AC phase including a current waveform having a current amplitude and a current phase angle and a voltage waveform having a voltage amplitude and a voltage phase angle; a DC side performing at least one of receiving and sourcing DC power; wherein for each individual AC phase of the plurality of AC phases, the current amplitude of the current waveform is controlled independently of the current amplitude of the current waveform in the other AC phases, and the difference between the current and voltage phase angles is controlled independently the difference between the current and voltage phase angles in the other AC phases.