R.F. de Camargo and H. Pinheiro (Brazil)
Three-Phase Three-Four PWM Converters, Normalized Voltage, Positive Sequence, Synchronous Frame.
This paper proposes a new open-loop synchronization method for three-phase four-wire PWM converters connected to the utility grid. It presents a better performance in terms of distortions in the synchronism signals if compared with other open-loop methods. In addition, a frequency adaptation algorithm is proposed for applications where large frequency variations are expected, such as in weak grids. Experimental results using a DSP TMS320F2812 are given to demonstrate the good performance of the proposed synchronism method.
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