Direct Power Control for a Grid Connection of a Three Phase Z-Source Inverter
Conference: PCIM Europe 2016 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2016 - 05/12/2016 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2016
Pages: 7Language: englishTyp: PDF
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Authors:
Steinbring, Manuel; Pacas, Mario (Universität Siegen, Hölderlinstraße 3, 57068 Siegen, Germany)
Abstract:
The Z-Source inverter (ZSI) has proven to be a robust and easy to control inverter. As a drawback it has increased requirements towards the PWM modulator to insert the shoot through states that are necessary for the boost operation. To overcome that restriction a novel direct power control (DPC) scheme that does not require a PWM has been developed and successfully validated by experiment. It works similarly to the well-known direct torque control (DTC) with the difference that the output voltage of the inverter does not directly control the flux and the torque of an electrical machine but the active and reactive power fed into the grid. In addition, the DPC control had to be extended to also manage the shoot through states i.e. the boosting of the ZSI.