光伏发电系统最大功率跟踪控制器的实现

Design on Maximum Power Tracking Control of Photovoltaic Power Generation System

针对目前太阳能发电系统效率较低的问题,该文利用MSP430微控制器设计了一种太阳能光伏发电最大功率点跟踪(MPPT)控制器。该设计基于改进的电压扰动观察算法,通过MSP430F5132实时采集降压斩波电路的输入功率与输出功率,并输出PWM波协同控制斩波电路的通断时间,实现整个系统的最大功率点稳定输出。通过测试,该设计各个模块协同工作,软硬件有效结合,使太阳能光伏发电系统的转换效率可达到95%以上,并具有体积小、成本低、跟踪效率高、可靠性高等优点,已成功运用在地质灾害监测供电系统中,提高了系统监测设备的长效性。

In view of the low efficiency of solar photovohaic system,this paper designed a solar photovohaic maximum power tracking controller which used the MSP430 mierocontroller. The design finally achieved the maximum power point of the whole system stable output,which is based on the design of improved oltage perturb ＆ observe algorithm ,and also due to the controller acquires input power and output power of the step-down chopper circuit in real time and outputs PWM wave cooperative control chopper circuit off time by MSP430F5132. Through testing,the design of each module work together,and effective combination of hardware and software ,so that the conversion efficiency of solar photovohaic power generation system can be up to 95% ,and which has a small size,low cost,high tracking efficiency,high reliability ,which has been successfully used in geological disaster monitoring and power sup- ply system,improve the system of long-term monitoring equipment.