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| Research on Direct Power Control for Brushless Doubly-Fed Wind Power Generator with a Novel Hybrid Rotor |
| Su Xiaoying1,2, Zhu Liancheng2, Jin Shi1, Zhang Fengge1, Sun Dan1 |
1. School of Electrical Engineering Shenyang University of Technology Shenyang 110870 China;
2. School of Electronic and Information Engineering University of Science and Technology Liaoning Anshan 114051 China;
3. College of Electrical Engineering Zhejiang University Hangzhou 310027 China |
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Abstract Because of no brushes and slip rings, brushless doubly-fed generators (BDFGs) have some advantages of maintenance-free thus higher reliability, smaller partially-rated converter and so on, which make them very possibly as a competitor for the doubly-fed induction generator and permanent magnet synchronous generator commonly used in wind energy conversion systems (WECS). In this paper, the direct power control (DPC) strategy for the BDFG with a novel hybrid rotor is presented, where according to the real and reactive power errors and sector number of the control winding flux vector, the variable-speed constant-frequency (VSCF) maximum power point tracking (MPPT) and unity power factor control (UPFC) can be implemented by applying the proper voltage space vector obtained with the traditional lookup-table on the machine side converter of control winding. Finally, the correctness, reliability and effectiveness of the proposed DPC for the novel BDFG are all be proved by the detailed simulation results and experimental measurements based on Matlab/Simulink and 8/4-25kW prototype laboratory test rig.
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Received: 14 June 2019
Published: 12 February 2020
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2020, Vol. 35 
