Control design of grid-connected three-phase inverters for voltage unbalance correction
| Title | Control design of grid-connected three-phase inverters for voltage unbalance correction |
| Publication Type | Conference Paper |
| Year of Publication | 2009 |
| Authors | Meersman, B, Renders B, Degroote L, Vandoorn T, Vandevelde L |
| Conference Name | Proceedings of the 44th International Universities Power Engineering Conference |
| Date Published | September |
| Conference Location | University of Strathclyde |
| Keywords | Power electronics at a system level Power Quality |
| Abstract | The increasing presence of single-phase distributed generators and unbalanced loads in the electric power system may lead to unbalance of the three-phase voltages, resulting in increased losses and heating effects. A type of voltage unbalance with a high probability in (low voltage) distribution networks is the unequal voltage magnitudes at the fundamental system frequency (under- and over-voltages). To decrease this voltage unbalance problem three-phase four-wire inverter-connected distribution units can be used. This paper proposes a control method for a three-phase four-wire inverter for Distributed Generation (DG) units which has a resistive behaviour for disturbances. The effect of the proposed control method on the voltage unbalance in the distribution network is simulated and is compared to the classical sinusoidal control strategy. The simulation results show the positive effect of the proposed control strategy on voltage unbalance. |
