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Maximum Power Tracking Control for a Wind Turbine System Including a Matrix Converter
Article in IEEE Transactions on Energy Conversion - October 2009
DOI: 10.1109/TEC.2008.2005316 - Source: IEEE Xplore
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3 authors, including:
Masoud Barakati University of Sistan and Baluchestan
J. Aplevich
University of Waterloo
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Maximum Power Tracking Control for a Wind Turbine System Including a Matrix Converter
S. Masoud Barakati, Member, IEEE, Mehrdad Kazerani, Senior Member, IEEE. and J. Dwight Aplevich, Member; IEEE
Abstract--This paper focuses on maximum wind power extrac- Controller & tion for a wind energy conversion system composed of a wind tur- MPPT algorithm bine, a squirrel-cage induction generator, and a matrix converter (MC). At a given wind velocity, the mechanical power available Wind Inductio Turbine Matrix from a wind turbine is a function of its shaft speed. In order to track maximum power, the MC adjusts the induction generator Rotor terminal frequency, and thus, the turbine shaft speed. The MC also adjusts the reactive power transfer at the grid interface to- Fig. 1. Block diagram of the proposed wind energy conversion system. ward voltage regulation or power factor correction. A maximum power point tracking (MPPT) algorithm is included in the control system. Conclusions about the effectiveness of the proposed scheme R Turbine rotor radius. are supported by analysis and simulation results. Sij Switching function (i=a,b,c and j= Index TermsMatrix converter (MC), maximum power track- A,B,C). ing, wind turbine. TG,Tc Torque and counter torque of generator. Tr,Topt Turbine torque and optimal turbine torque. NOMENCLATURE Vi,Uj MC input and output voltages (i = a, b, c and Parameter for adjusting matrix converter j=A,B,C). a Vs (MC) input displacement power factor (PF). Generator terminal voltage. Vw Wind velocity. Ar Area covered by wind turbine rotor (A, = 3 Rotor blade pitch angle in radian. TR2). B Damping coefficient. Tip-speed-ratio (= wT R/V) P Air density in kilogram cubic meter. Performance coefficient (or power ImDm Generator and turbine shaft speeds. coefficient). We,We rated Stator angular electrical frequency and its fi, fo Input and output frequencies of MC. rated value. ii,ij MC input and output currents (i = a, b, c and WPopt Angular speed at the maximum power. j=A,B,C). WT Shaft speed on high- or low-speed gearbox Ir. Rotor current of induction generator. J Total shaft moment of inertia. side. Rotor angular speed frequency at maximum Jr,JG Rotor inertia of wind turbine and generator. Constant V/f coefficients. power. KvF,kw Stiffness coefficient. Ws Synchronous speed. Ks Li,Ri,Ci MC input filter inductance, resistance, and idosm Synchronous frequency at maximum pow