直驱型风力发电新型并网变换器控制策略研究  

Study of control strategy for direct-drive wind power system based on a novel grid-connected converter

作　　者：张小平[1] 李庆[1] 刘德顺[2] 

机构地区：[1]湖南科技大学先进矿山装备教育部工程研究中心,湖南湘潭411201 [2]湖南科技大学机械设备健康维护湖南省重点实验室,湖南湘潭411201

出　　处：《电源技术》2013年第11期2012-2015,共4页Chinese Journal of Power Sources

基　　金：湖南省自然科学湘潭联合基金(10JJ9007);湖南省科技计划项目(2012GK3099);湖南省产学研结合创新平台项目(2010XK6066);湖南省重点实验室建设专项项目(2011-TP4005-4)

摘　　要：Buck-Boost矩阵变换器(BBMC)因具有优良的电气特性而适于作为直驱型风力发电系统的并网变换器,并就相应的并网控制策略进行研究。阐述了该变换器的基本工作原理,建立了其网侧变换器基于局部平均值的数学模型,在此基础上提出了以电网电压为参考的双闭环并网控制策略,并利用MATLAB对其控制效果进行了仿真验证。结果表明:无论BBMC输入侧电压与频率如何变化,其输出电压都能准确地跟踪电网电压的变化,且直接输出高品质的正弦波而无需滤波环节,谐波含量小,从而达到了并网控制的基本要求,具有一定的应用价值。The Buck-Boost matrix converter （BBMC） with a series of excellent electrical characteristics is suitable to be taken as a grid-connected converter for direct-drive wind power system. The grid-connected control strategy was put forward in this paper. The basic principle of this converter was elaborated and the mathematical model of its grid side converter was established based on the local mean value concept. On the basis of which, the double-loop grid-connected control strategy was proposed with the grid voltage as the reference, and the validity of this control strategy was tested by means of MATLAB. The results show that the output voltage of BBMC can accurately track the variation of the grid voltage despite of the changeable input voltage and frequency. Moreover, a normal sine wave with less harmonic distortion can be directly gotten without filtering. So the basic requirements of grid-connected control were achieved, which is of certain practical importance.

关 键 词：Buck—Boost矩阵变换器 直驱型风力发电 并网控制 仿真 

分 类 号：TM46[电气工程—电器]