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Modeling and variable structure power control of PMSG based variable speed wind energy conversion system

Y. ERRAMI1, M. OUASSAID2, M. MAAROUFI1

Affiliation

  1. Department of Electrical Engineering, Ecole Mohammadia d’Ingénieurs-University Mohammed V Agdal, Rabat- Morocco
  2. Departement of Industrial Engineering, National School of Application Sciences (ENSA-Safi), Cadi Ayyad University, Safi, Morocco

Abstract

In the proposed Wind Energy Conversion System (WECS) a Permanent Magnet Synchronous Generator (PMSG) is used as a variable speed generator. The WECS model includes a wind turbine, a PMSG, PWM rectifier in generator-side, intermediate DC circuit and PWM inverter in grid-side. In this work, the control strategy combines Sliding Mode (SM) nonlinear control and Maximum Power Point Tracking (MPPT) control strategy to maximize the generated power from Wind Turbine Generator (WTG). Besides, considering the variation of wind speed, both converters use the SM scheme. The PMSG side converter is used to achieve MPPT, while the grid-side converter regulates DC-link voltage and injects the generated power into the AC network. Active and reactive power are controlled by direct and quadrature current components, respectively. On the other hand, the pitch angle is active in high wind speeds and it is designed to prevent WTG damage from excessive wind speed. Furthermore, the results of the simulation are shown to verify the effectiveness and to prove the concept of the control strategy..

Keywords

WECS, PMSG, MPPT, Lyapunov theory, Sliding Mode control, Unity power factor.

Submitted at: Sept. 28, 2013
Accepted at: Nov. 7, 2013

Citation

Y. ERRAMI, M. OUASSAID, M. MAAROUFI, Modeling and variable structure power control of PMSG based variable speed wind energy conversion system, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 11-12, pp. 1248-1255 (2013)