不同光照下太阳光伏电能的分级利用方法

Multi-level absorption method of output power of photovoltaic cells under different light intensity

介绍了能够在不同光照天气下,高效利用太阳电池输出电能的控制方法。电路由一个太阳电池、多级蓄电池及其DC-DC升压充电电路、电压电流检测电路、单片机控制单元、继电器切换电路、PWM脉冲输出电路等组成。由软件驱动单片机,检测输入到IO端口的太阳电池输出电压、电流及各级蓄电池电压,并根据这些电压、电流值,得出太阳电池输出的电功率大小及各级蓄电池电量储存情况,控制继电器对电路进行切换,控制PWM输出信号,实现在不同光照条件下吸收太阳光伏电能,从而使电路全天候地高效率利用太阳电池输出的电功率。

A control method about efficient use of electricity power generated by solar photovoltaic cells in a different light weather was introduced. The circuit consisted of solar photovoltaic cells, multi-level battery and its DC-DC boost charging circuit, voltage and current detection circuit, microprocessor control unit, relay switching circuit, the PWM pulse output circuit. Software drove single-chip computer via IO port to test the output voltage and current of solar PV cells, and battery voltage at all levels. According to these voltage and current values, the output power and power storage at all levels were obtained. The control relay was used to switch the circuit, and control the PWM signal so as to achieve the absorption of photovoltaic electricity power in different lighting conditions. In this way, the circuit can efficiently use the power generated by solar photovoltaic cells around the clock.