独立太阳能扬水系统的最大功率点跟踪方法  

MAXIMUM POWER POINT TRACKING METHOD FOR STAND-ALONE SOLAR PUMPING SYSTEMS

作　　者：徐政[1] 何少强[1] 李友春[1] 

机构地区：[1]清华大学深圳研究生院电力系统国家重点实验室深圳研究室,深圳518055

出　　处：《太阳能学报》2008年第2期193-197,共5页Acta Energiae Solaris Sinica

摘　　要：为改善独立太阳能扬水系统的动态特性,提出多重判据最大功率点跟踪控制法,并将其与经典的常压法结合,形成混成控制法。同时对变频器输出频率的最小调节步长进行了优化。新的控制方法对MPU性能的要求低,比传统方法具有更高的响应速度及更好的稳定性。长期运行实验表明,混成最大功率点跟踪控制方法可以快速响应光照强度变化,实现系统在最大功率点的稳定运行。To improve the dynamic characteristics of stand-alone solar pumping systems without backup batteries, a multicriterion maximum power point tracking （MPPT） method was proposed in this paper. Furthermore, a novel hybrid control method was achieved by combining the multi-criterion method with the conventional constant voltage method. The minimum step size of the output frequency of the inverter was also optimized. The new MPPT control strategy can be executed by a low cost MPU, and its dynamic characteristics and stability are much better than those of the conventional methods. The experimental results over a long period show that the hybrid method can withstand rapid irradiation variation, and the system tracks the maximum power point very well.

关 键 词：太阳能扬水系统 最大功率点跟踪 变频器 

分 类 号：TM615[电气工程—电力系统及自动化]