Abstract：A novel full-size power converter which consists of a machine side auto-transformer rectifier unit (ATRU) and grid side Z-source inverter(ZSI)is proposed in this paper. The power converter owns the merits of simple structure, high reliability, and high efficiency, which could cater for the off shore wind turbines where high reliability is required. The operational principle of the ATRU and ZSI is briefly introduced. Some design rules are concluded based on the feasibility analysis of applying ATRU to variable speed wind turbines. Then, the relationship between input voltage and dc link voltage of ZSI is carefully discussed, which decides the design requirements of PMSG and inverter. A control strategy including the functions of maximum power point tracking (MPPT) function and dc link voltage stabilizing is devised for the wind energy conversion system (WECS), based on the proposed full-scale power converter, and the input voltage feed forward control method is adopted for the ZSI. to improve the dynamic performance of do link peak voltage. Finally, a simulation case is implemented, and the simulation results show the correctness and feasibility of the proposed power converter and its control strategy.
陈杰, 龚春英, 陈家伟, 张方华, 严仰光. 一种新型的风力发电全功率变流器[J]. 电工技术学报, 2012, 27(11): 160-168.
Chen Jie, Gong Chunying, Chen Jiawei, Zhang Fanghua, Yan Yangguang. A Novel Full-Size Power Converter for Wind Energy Conversion System. Transactions of China Electrotechnical Society, 2012, 27(11): 160-168.
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2012, Vol. 27 
