小型风力发电并网逆变器控制策略综述
电气传动2017年第47卷第9期小型风力发电并网逆变器控制策略综述
玄兆燕1，马振宇1，景会成2，赵欣3
（1.华北理工大学机械工程学院，河北唐山063009；2.华北理工大学电气工程学院，
河北唐山063009；3.唐山市拓又达科技有限公司，河北唐山063020）
摘要：为提高小型风力发电系统并网工作性能，以两级式并网逆变器为对象，对其各种策略进行了对比分析。从逆变系统需要实现的控制目标出发，对现有的3种整体控制策略进行了分析。对于风能最大功率跟踪（MPPT ）控制，给出了最大风能捕获方法和最大电功率输出方法，指出最大风能捕获方法在实际应用中的困难，重点介绍了最大电功率输出方法；对于直流母线电压及并网电流控制，由于其为整个风电系统的关键环节，着重探讨了其各种控制策略，分析其优缺点并给出了改进方案；并网滤波器作为改善并网电能质量的有效方法，对其作用及分类进行了简单探讨。最后，针对小型风力发电两级式并网逆变器控制策略的发展趋势给出了诸多展望。
关键词：两级式；并网逆变器；最大功率跟踪控制；直流母线电压控制；并网电流控制
中图分类号：TM464文献标识码：A DOI ：10.19457/j.1001-2095.20170909
Control Strategy Review of Small Wind Power Grid Inverter
XUAN Zhaoyan 1，MA Zhenyu 1，JING Huicheng 2，ZHAO Xin 3（1.College of Mechanical Engineering ，North China University of Science and Technology ，Tangshan 063009，Hebei ，China ；2.College of Electrical Engineering ，North China University of Science and Technology ，Tangshan 063009，
Hebei ，China ；3.Tangshan Toyoda Science and Technology Co.，Ltd.，Tangshan 063020，Heibei ，China ）
Abstract:Analysis and comparisons of various control strategies were carried out ，to improve the grid -connected performance of small scale wind power generation system ，while the two stage grid connected inverter was taken as an object.Starting from control objectives inverter system needs to achieve ，the analysis were carried out on the existing three overall control strategy.For wind energy maximum power point tracking （MPPT ）control ，the maximum wind energy capture method and the maximum power output were given ，the difficulties in the maximum wind energy capture method in practical application were pointed out ，the maximum power output method was focused on.Because DC -link voltage and grid current control are key links for the entire wind power system ，its various control strategies were emphatically discussed ，its advantages were analyzed and the improvement plan was put forward.Grid connected filter was as an effective method to improve the quality of grid connected power ，its function and classification were briefly
discussed.Finally ，the development trend of small wind power system two levels of grid inverter control strategies were presented.Key words:two -stage ；grid -connected inverter ；maximum power point tracking control ；DC -link voltage control ；grid current control 基金项目：河北省国际科技合作项目（16394301）作者简介：玄兆燕（1963-），女，博士，教授，Email ：1455194609@https://www.360docs.net/doc/35905298.html,
ELECTRIC DRIVE 2017Vol.47No.9
随着化石能源危机和环境污染问题日益突
出，绿色可再生能源得到了快速发展。近年来，
国内外建立了大量风力、光伏发电站。我国总
体风能资源较丰富，但分布不均匀，出现了风能
资源富集区域与负荷中心区域逆向分布［1］。使
得大型风电站必须经过高压远距离运输才能到达负荷中心，不仅增加了投资成本，还造成一定资源的浪费。此外，由于风速的随机性使得大型风电站的接入给公用电网电能质量带来很大的冲击。
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