变速恒频风力发电最大功率点跟踪控制  

Maximum Power Point Tracking Control Strategy for Variable-Speed Constant-Frequency Wind Power Generation

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

机构地区：[1]上海大学机电工程与自动化学院上海市电站自动化技术重点实验室,上海200072 [2]南通大学电子信息学院,江苏南通226007

出　　处：《上海大学学报（自然科学版）》2009年第4期351-357,共7页Journal of Shanghai University:Natural Science Edition

基　　金：教育部博士点基金资助项目(20060280018);上海市教委基金资助项目(06ZZ03);南通大学自然科学研究基金资助项目(08Z022)

摘　　要：交流励磁变速恒频(VSCF)风力发电时,常使用电网电压定向矢量控制技术来实现双馈电机(DFIG)输出有功、无功功率的解耦控制,从而完成最大风能跟踪.然而研究发现,在实行最大风能跟踪时,发电系统向电网输送的净电能并非最多.提出一种以向电网输送净电能最多为目标的新的最大功率点跟踪控制策略.该控制策略在不检测风速情况下,能够自动寻找并跟随最大功率点,且不依赖风力机最佳功率特性曲线,提高了发电系统的运行效率,具有良好的动、静态性能和鲁棒性.仿真和实验结果证明了该控制策略的正确性与有效性.Vector control technique of grid voltage orientation is often applied in AC-exeited variable speed constant frequency （VSCF） wind power generation to implement deeoupling control of active power and reactive power. Using this method, maximum wind energy tracking can be realized. However, the net power delivered to the grid in the maximum wind energy tracking mode does not reach the upper limit. In this paper, a novel maximum power point tracking control strategy is presented to deliver a maximum amount of power to the grid. The maximum power point can be tracked automatically without measuring wind speed, and the control is independent of optimal turbine power curve. It has excellent dynamic and static performances and good robustness. Simulation and experimental results confirm validity and accuracy of this technique.

关 键 词：变速恒频 电网电压定向 解耦 最大功率点跟踪 

分 类 号：TM310[电气工程—电机]