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| Study on Vector Control System and Power Flow of Cascaded Brushless Doubly-Fed Induction Generator |
| Cheng Ming1, Xu Litong1,2, Cao Zheng1, Wei Xinchi3, Ning Xinfu1,4 |
1. School of Electrical Engineering Southeast University Nanjing 210096 China;
2. Hangzhou Power Supply Company State Grid Zhejiang Electric Power Co. Ltd Hangzhou 310016 China;
3. State Grid Shanghai Electrical Power Research Institute Shanghai 200437 China;
4. Jiaxing Power Supply Company State Grid Zhejiang Electric Power Co. Ltd Jiaxing 314001 China |
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Abstract The vector control and power flow of the cascaded brushless doubly-fed induction generator (CBDFIG) are studied in this paper. Firstly, the dynamic model and steady-state equation are established. The grid-side converter is controlled by the grid voltage-oriented vector control and the machine-side converter is controlled by the stator flux-oriented vector control to realize the variable- speed constant-frequency operation of CBDFIG and the decoupling control of active and reactive power. Meanwhile, the vector control of the back-to-back converter can realize the bidirectional flow of power. Then, the power flow analysis is carried out. The active power distribution and the power state of power winding and control winding at different speeds are explored, and the changing trend of the power flow on the control side is revealed under consideration of copper loss. Through simulation and experiment, the effectiveness of the vector control and the correctness of the power flow analysis are verified.
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Received: 27 May 2021
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2022, Vol. 37 
