一种基于模拟电路MPPT技术的独立光伏电源系统

摘要

An independent photovoltaic power system based on analog circuit MPPT control is proposed in this paper.The system consists of photovoltaic array as the input,superbuck circuit as the converter and paralleled battery and load as the output.Analog circuit MPPT control,battery constant voltage control and battery constant current control work in coordination to allow the system to get the maximum power point of the photovoltaic array with the respect of battery safe charge and discharge.The system has the advantages of high solar energy usage,high reliability,small ripple wave and low cost.The simulation and experimental results show that the system can track the maximum power point accurately and maximize the use of the solar energy with the battery.%本文提出了一种基于模拟电路MPPT控制的独立光伏电源系统,输入侧为光伏电池阵,变换器采用Superbuck电路,输出侧接蓄电池和负载.系统采用模拟电路MPPT与蓄电池的恒压、恒流控制协调控制的方法,在保证蓄电池安全充放电的前提下实现光伏电池的最大功率输出.该系统具有太阳能利用率高,可靠性高,纹波小,成本低的优点.仿真和实验结果表明,该系统在MPPT模式下能够准确地追踪光伏电池最大功率点,并且通过与蓄电池储能的配合实现对太阳能最大限度的利用.