Abstract：This paper proposes a sliding mode control strategy based on feedback linearization technique to mitigate sub-synchronous control interaction (SSCI) in series-compensated doubly fed induction generator (DFIG)-based wind farms. Firstly, feedback linearization was employed to cancel the inherent nonlinearities of DFIGs. Secondly, linear switching function and exponential reaching law were used for sliding mode control design. Finally, the performance of the proposed feedback-linearized sliding mode control strategy was evaluated as compared to the well-tuned proportion-integral control and conventional sub-synchronous resonance damping control through eigenvalue analysis and nonlinear time-domain simulation. Simulation results demonstrate that the designed control strategy improves system damping and mitigates SSCI under varying wind speeds and compensation levels. The proposed feedback-linearized sliding mode control also improves system robustness under external disturbances and parameter perturbation.
李鹏瀚, 王杰, 吴飞. 双馈风电机组次同步控制相互作用的反馈线性化滑模变结构抑制[J]. 电工技术学报, 2019, 34(17): 3661-3671.
Li Penghan, Wang Jie, Wu Fei. Sub-Synchronous Control Interaction Mitigation for DFIGs by Sliding Mode Control Strategy Based on Feedback Linearization. Transactions of China Electrotechnical Society, 2019, 34(17): 3661-3671.
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2019, Vol. 34 
