不对称电网故障下直驱永磁风力发电系统直流母线电压稳定控制

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Abstract This paper analyzes fluctuation mechanism on DC voltage of directly-driven wind turbine with permanent magnet synchronous generator under asymmetrical faults and studies stability control strategy in order to improve the capability of faults when asymmetry faults took place. Based on the method of symmetrical components for voltage and current, a vector-oriented control strategy which oriented on positive and negative voltage respectively is proposed to elimilate the fluctuation in power tranmission and to stabilize the DC voltage under asymmetrical faults, and then a energy consumption crowbar is used to consump the excrescent active power for the wind turbine un-off-line operation on grid faults.The simulation results show that the strategy is effective on inhibiting the DC voltage fluctuation, and the energy consumption crowbar could prohibit the over-voltage successfully in the asymmetrical faults. The experimental results prove the validity of the control strategy.

Key words： Wind power directly-driven voltage-oriented asymmetrical faults fault ride through

Received: 11 June 2009 Published: 04 March 2014

PACS:	TM614
	TM713

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	Xiao Lei
	Huang Shoudao
	Huang Keyuan
	Ye Sheng

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Xiao Lei,Huang Shoudao,Huang Keyuan等. DC Voltage Stability of Directly-Driven Wind Turbine With PM Synchronous Generator During the Asymmetrical Faults[J]. Transactions of China Electrotechnical Society, 2010, 25(7): 123-129.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2010/V25/I7/123

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作者简介:肖磊男, 1984年生, 博士研究生, 研究方向为电力电子与电机传动和风力发电等。黄守道男, 1962年生, 博士, 教授, 研究方向为电机电器与电机传动和风力发电等。