双馈风力发电系统最大功率点跟踪控制策略  

MPPT Control Strategy for Doubly-Fed Wind Power Generation

作　　者：马祎炜[1,2] 俞俊杰[1,2] 吴国祥[1,2] 陈国呈[1,2] 

机构地区：[1]上海大学机电工程与自动化学院,上海200072 [2]上海市电站自动化技术重点实验室,上海200072

出　　处：《电工技术学报》2009年第4期202-208,共7页Transactions of China Electrotechnical Society

摘　　要：双馈风力发电系统最大功率点跟踪通常基于实验测定的最佳风速-功率-转速曲线,但在长期运行中系统参数的变化会使实际最大功率点偏离原曲线,影响最大功率跟踪效果。在分析风力机特性、双馈风力发电机数学模型及功率关系的基础上,提出了一种以向电网输出电能最大为目标、不依赖最佳风速-功率-转速曲线的最大功率点跟踪策略,实现了定子输出有功、无功解耦控制。仿真和实验证明,基于该方法,双馈风力发电系统在风速变化过程中能自动寻找并跟随最大功率点,且控制相对简单,运行可靠,有较高的实用价值。The maximum power point tracer （MPPT） of doubly-fed wind power generation is generally based on the curve of optimal wind speed-power-wind turbine rotational speed extracted from experiment results. After long-term operation, the actual maximum power point will deviate from the original curve due to the change of system parameters, which influences the effect of maximum power point tracer. Based on analysis of the characteristic of wind turbine, the mathematical model of doubly-fed induction generator and the relation of powers and currents, this paper presents a MPPT strategy to realize the decoupling control of stator active power and stator reactive power which doesn＇t rely on the characteristic curve of wind turbine. The simulation and experimental results show that in the wind speed changing process the doubly-fed wind power generation system can search and trace the maximum power point automatically by using this method. Moreover, this control method is comparatively easy, reliable and has high practical value.

关 键 词：变速恒频 双馈电机 最大功率点跟踪 

分 类 号：TM614[电气工程—电力系统及自动化]