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A Multiple-Reference Complex-Based Controller for Power Converters
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DOI：10.1109/TPEL.2021.3088801.png)
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Abstract
En 中文
A multiple-reference complex-based controller is proposed for three-phase power converters feeding nonlinear and unbalanced loads. The control scheme incorporates a stable multiple-complex coefficient filter with bandwidths that are set arbitrarily and independently for every harmonic under consideration. The multiple-reference complex-based control scheme is applied to an uninterruptible power supply system with a voltage source converter. Each harmonic is controlled using a standard complex proportional-resonant controller that is designed for stability and robustness using the Nyquist criterion. Similar stability and robustness properties follow for the overall system due to the frequency-domain properties of the filter and of the controllers. The proposed methodology is validated in simulation and experimental tests.
Keywords:
Harmonic analysis
Power harmonic filters
Transfer functions
Stability criteria
Cutoff frequency
Signal processing algorithms
Uninterruptible power systems
Complex Nyquist plots
complex-valued transfer functions
multiple-complex coefficient filter (MCCF)
proportional-resonant (PR) complex controller
three-phase voltage-source converter (VSC)
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