Title: Predictive control of variable speed wind energy conversion chain-based multilevel converters with balanced voltages

Authors: Zakaria Lammouchi; Said Chikha; Kamel Barra

Addresses: Department of Electrical Engineering, Echahid Hamma L'akhder University, El-oued, 39000, Algeria ' Department of Electrical Engineering, Larbi Ben M'hidi University, Oum El Bouaghi, 04000, Algeria ' Department of Electrical Engineering, Larbi Ben M'hidi University, Oum El Bouaghi, 04000, Algeria

Abstract: The paper presents an improved predictive rotor current control of variable speed wind energy conversion system based doubly fed induction generator. The method is based on finite states space model of the converter. The proposed control selects the optimal switching state that minimises the error between orthogonal rotor current components predictions to their computed values. Then, the optimal voltage is applied to the output of the power converter. Once the proposed predictive strategy is validated, multilevel converters, well suited for high power-medium voltage application are used to improve and highlight the obtained results in term of low ripples, high efficiency and low harmonics. One of the most benefits of the proposed control is its flexibility, so more terms can be added in the cost function to satisfy multiple objectives simultaneously. The superiority of the proposed predictive control over the conventional control will be investigated and confirmed by simulation results.

Keywords: variable speed wind energy conversion system; predictive rotor current control; cost function; multilevel converter; unbalance voltage.

DOI: 10.1504/IJRET.2019.097034

International Journal of Renewable Energy Technology, 2019 Vol.10 No.1/2, pp.149 - 166

Accepted: 28 Aug 2018
Published online: 14 Dec 2018 *

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