计及定子励磁电流变化的永磁双馈发电机零转矩控制策略

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Abstract A new control strategy for rotor-side converter of a novel permanent magnet doubly-fed induction generator(PMDFIG) is discussed. The new control strategy can enhance the low voltage ride-through(LVRT) capability. By the analysis of structure and electromagnetic relations, the mathematical model of PMDFIG based on the rotating coordinate system is established. The zero torque control scheme considering stator excitation current change is introduced when low voltage occurs due to grid fault. The effectiveness of the proposed control strategy is demonstrated by two simulation cases. Compared with the conventional crowbar protection, the proposed control method can effectively improve the LVRT capability of the PMDFIG during the grid serious faults.

Key words： Wind power generation permanent magnetic doubly fed induction generator (PMDFIG) zero torque control Crowbar control low voltage ride-through

Received: 04 June 2013 Published: 05 August 2014

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TM315

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	Diao Tongshan
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Diao Tongshan,Wang Xiuhe. Zero Torque Control Strategy for Permanent Magnet Doubly Fed Induction Generators Considering Stator Excitation Current Change[J]. Transactions of China Electrotechnical Society, 2014, 29(7): 173-180.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I7/173

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