基于反向电流跟踪的双馈风机低电压穿越控制策略

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Abstract The low voltage ride through (LVRT) of doubly-fed induction generator (DFIG) via excitation control during severe faults is one of the highlights in wind energy conversion system (WECS). In current most control strategies need accurate observation and fast sequence separation of flux, and will lead to the torque pulsation. After summarizing the common characteristics of various efficient low voltage ride-through control strategies on the port from the perspective of physics principle, a reverse current tracking control strategy is then proposed in this paper. The stator current multiplied by a certain coefficient is set as the reference of rotor current during the faults, which is simple in structure and can restrain the torque pulsation effectively. Case study verifies the effectiveness of the improved method. It is shown that using the proposed method, at 20% over-synchronous speed, the DFIG can achieve LVRT under 80% symmetrical fault or 100% single phase fault.

Key words： Doubly-fed induction generator low voltage ride through evere faults Lenz law

Received: 18 November 2013 Published: 03 March 2016

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TM712

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	Articles by authors
	Chen Jianqing
	Zou Xudong
	Liang Zongze
	Tong Li
	Xiong Wei
	Zhu Donghai

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Chen Jianqing,Zou Xudong,Liang Zongze等. An Improved Control Strategy of Doubly-Fed Wind Turbine under Voltage Dips Based on Reverse Current Tracking[J]. Transactions of China Electrotechnical Society, 2016, 31(2): 221-229.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I2/221

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