永磁直驱风电机组低电压穿越时的有功和无功协调控制

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Abstract This paper investigates the control and operation of the mutil-pole permanent magnet synchronous generator (PMSG)-based wind generation systems employing the full-scale frequency converter under network fault conditions. The factors inducing the DC-link voltage oscillations during grid voltage dips are analyzed,and a novel control strategy is proposed. In the novel control scheme,the generator-side converter is employed to maintain a stable DC-link voltage,while the grid-side converter is used to realize the maximum power point tracking (MPPT) and the coordinated control for the active and reactive power. According to the DC-link voltage variation during the grid voltage dips,the generator-side converter is controlled to regulate the PMSG electromagnetic power,which translates the unbalance power of the DC-link side into the generator rotational rotor so as to maintain the constant DC-link voltage. Meanwhile,the grid-side converter is employed to realize the coordinated control strategy for the active and reactive power output of the grid-side converter according to the grid voltage change level. The simulation results implemented in Matlab/Simulink show that the proposed control strategy in this paper not only significantly improves the LVRT capability of PMSG by means of suppressing the DC-link voltage oscillation during voltage dips,but also effectively provides a dynamic reactive power support to contribute to the grid voltage recovery.

Key words： Wind power generation permanent magnet synchronous generator low voltage ride through coordinated control for active and reactive power maximum power point tracking

Received: 06 January 2012 Published: 11 December 2013

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TM614

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	Li Heming
	Dong Shuihui
	Wang Yi
	Ren Yazhao

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Li Heming,Dong Shuihui,Wang Yi等. Coordinated Control of Active and Reactive Power of PMSG-Based Wind Turbines for Low Voltage Ride Through[J]. Transactions of China Electrotechnical Society, 2013, 28(5): 73-81.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I5/73

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