风电场中级联STATCOM直流侧电压控制方法

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Abstract As wind energy has the characteristics of randomness and intermittent, the fluctuations of each module DC voltage of cascade STATCOM is more obvious. This paper setted up the mathematical model of cascade STATCOM in wind farm, analyzed the control characteristics in the fourth quadrant, and proposed the method of active power equal distribution to control the voltage of each module DC side to be balancing, which could control the AC side’s input active power to control the DC side’s voltage. By using hierarchical coordinated control strategy to regulate active power and reactive power of cascade STATCOM. In the upper, it could realize the whole control by decoupling ; in the lower, it could realize the equal distribution of active power by using the module controller. Simulation and experimental results show that this method can effectively stabilize the DC side’s voltage of the cascade STATCOM.

Key words： Wind farm cascade STATCOM decoupling separation active power equal distribution

Received: 01 October 2012 Published: 25 March 2014

PACS:

TM712

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	Articles by authors
	Li Shengqing
	Xu Wenxiang
	Li Weizhou
	Zeng Huanyue

Cite this article:

Li Shengqing,Xu Wenxiang,Li Weizhou等. DC Capacitor Voltage Balancing Control for Cascade STATCOM in Wind Farm[J]. Transactions of China Electrotechnical Society, 2013, 28(3): 248-253.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I3/248

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