New Synchronization Method for Three-Phase Four-Wire PWM Converters under Unbalance and Harmonics in the Grid Voltages

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.

Important Links:

Go Back