基于模型预测直接转矩控制的永磁同步发电机效率优化研究

doi:10.19595/j.cnki.1000-6753.tces.170800

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Abstract A new model predictive direct torque control (MPDTC) scheme of efficiency optimization is proposed in this paper to suppress the torque ripple of wind generator and running efficiency of the wind energy conversion system based on a direct-drive permanent magnet synchronous generator (PMSG). The MPDTC is combined with the generator loss model of PMSG. A predictive value of stator active current which is used to obtain the predictive value of electromagnetic torque is proposed to replace the traditional predictive value of stator current. The stator active current setting value is obtained from the minimum loss point of the wind power generator system. Besides, the torque setting value is obtained from the maximum wind power extraction control adopting the optimal feedback torque method. A cost function for efficiency optimization is designed to select the optimum voltage vector, so as to keep the system running in the state of minimum loss. Simulation studies and experiment researches are carried out on a surface-mounted PMSG by doing speed step and torque step. The results confirm that the proposed method has inhibited the torque ripple, and improved dynamic response while improving the efficiency of the system.

Key words： Model predictive control direct torque control permanent magnet synchronous generator efficiency optimization

Received: 06 June 2017 Published: 14 August 2018

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TM315

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	Miao Lei
	Zhang Yongjun
	Tong Chaonan
	Xiao Xiong
	Wang Wei

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Miao Lei,Zhang Yongjun,Tong Chaonan等. Efficiency Optimization of Permanent Magnet Synchronous Generators Based on Model Predictive Direct Torque Control[J]. Transactions of China Electrotechnical Society, 2018, 33(15): 3535-3546.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170800 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I15/3535

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