独立太阳能扬水系统专用变频器的开发

开发完成独立太阳能能扬水系统专用变频器，具备全自动运行、最大功率点跟踪控制、运行数据存储等功能。针对无蓄电池的太阳能扬水系统特性，采用自主研究的混成最大功率点跟踪控制法和优化最小调节步长。在光照强度快速变化的状况下，新的最大功率点跟踪疗法比传统方法具有型高的响应速度、更好的稳定性。长期运行试验表明，专用变频器各项技术指你优良，性能稳定，可靠性高，能够确保系统在最大功率点的稳定运行。

Development of Application Specific inverters for Stand-alone Solar Pumping Systems

Application specific inverters for stand-along solar pumping systems have been developed.They have functions of fully automatic operation,maximum power point tracking (MPPT) control and memorization of operating data.Based on the characteristics of the system without backup batteries,the hybrid strategy of MPPT control and the optimized minimum step size we have proposed previously are installed.Under the condition of rapid insolation variation,the dynamics and stability of the new MPPT control strategy are much better than those of the conventional methods.The experimental results over a long period of continuous test operation show that the inverters meet the specification,have stable performance and high reliability,and the systems track MPP very well.