Asymmetrical Low-Voltage Ride Through of Brushless Doubly Fed Induction Generators for the Wind Power Generation
Asymmetrical Low-Voltage Ride Through of Brushless Doubly Fed Induction Generators for the Wind Power Generation
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DOI：
10.1109/tec.2013.2261818
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发表时间：
2013-09-01
影响因子：
4.9
通讯作者：
Liu, Shi
中科院分区：
文献类型：
--
作者：
Long, Teng;Shao, Shiyi;Liu, Shi
无刷双馈风力发电机（BDFIG）与双馈风力发电机（DFIG）相比，具有成本低、可靠性高等优点，在风力发电领域具有巨大的商业潜力。在最新的电网规范中，要求风力发电机能够穿越低电压故障。由于负序的存在，感应发电机在非对称电压暂降和对称电压暂降下的响应不同。本文对BDFIG在不同类型的不对称故障下的行为进行了全面的分析，并提出了一种新的控制策略，使BDFIG能够在不需要任何额外硬件（如撬棍）的情况下穿越不对称低压暂降。所提出的控制策略的实验验证了250千瓦BDFIG。
Compared with the Doubly fed induction generators (DFIG), the brushless doubly fed induction generator (BDFIG) has a commercial potential for wind power generation due to its lower cost and higher reliability. In the most recent grid codes, wind generators are required to be capable of riding through low voltage faults. As a result of the negative sequence, induction generators response differently in asymmetrical voltage dips compared with the symmetrical dip. This paper gave a full behavior analysis of the BDFIG under different types of the asymmetrical fault and proposed a novel control strategy for the BDFIG to ride through asymmetrical low voltage dips without any extra hardware such as crowbars. The proposed control strategies are experimentally verified by a 250-kW BDFIG.