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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2017

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Predictive and look-up table control methods of a three-level AC-DC converter under distorted grid voltage

Falkowski P., Kulikowski K., Grodzki R.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2017

Vol. 65, nr 5

609--618

Power electronic three-level AC-DC converters connecting a utility grid with DC supplies are widely used in renewable energy sources. For such distributed systems, the quality of energy is very important. Hence, control algorithms of an AC-DC converter have to provide not only a sinusoidal shape of grid current, but also stable operation during transient states in the grid, e.g. voltage dips or voltage unbalance. This paper deals with the problem of robustness of AC-DC control methods under disturbed grid voltage. Three modern predictive control algorithms are presented and investigated under grid voltage distortions. Experimental results from a laboratory test setup illustrating properties of the described methods are shown.