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Sliding Mode Control with MPPT for DFIG to Improve the Dynamic Performance

Venu Madhav Gopala 1 and Obulesu Y. P. 2
1. Dept. of EEE, Anurag Group of Institutions (School of Engineering), Ghatkesar, India
2. Dept. of EEE, K. L. University, Vijayawada, India

Abstract—Linearization approach is the common practice used to address the control problem of wind based turbines; generally, it is tedious and not good because of unavoidable uncertainties and vague operating conditions present in the system which leads to indigent system performance with low reliability. Therefore the need of dynamic resilient Sliding Mode Controller (SMC) strategy is required to take into account these control problems. In this paper, control of the power generation in wind generator is investigated. The wind energy systems have two operating regions depending on the wind turbine tip-speed ratio, which are distinguished by minimum phase behavior in one of these regions and a non-minimum phase in the other one. In spite of the model uncertainties, to fortify stability in two operating regions and to apply the best possible feedback control solution, a SMC strategy with Maximum Power Point Tracking is proposed in this paper which is applied to Doubly Fed Induction Generator (DFIG). The dynamic performance and power capture is improved in the case of the SMC strategy based DFIG compared to standard control of the DFIG. The proposed SMC strategy and standard control of DFIG are validated by using Fatigue, Aerodynamics, Structures, and Turbulence code (FAST).

Index Terms—power generation control, sliding mode control, doubly fed induction generator, wind energy conversion system

Cite: Venu Madhav Gopala and Obulesu Y. P., "Sliding Mode Control with MPPT for DFIG to Improve the Dynamic Performance," International Journal of Electrical Energy, Vol. 5, No. 1, pp. 34-41, June 2017. doi: 10.18178/ijoee.5.1.34-41

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