基于开关电容的光伏组件能量优化方法研究

Research on energy optimization method of photovoltaic modules based on switched capacitor

目的:串联配置的光伏电池串以及光伏组件在阴影或其它失配条件下会损失部分功率,严重时会产生热斑,今欲研究一种光伏电源架构能够在发生失配条件下提升组件的输出能量。方法:采用一种基于开关电容均衡器的光伏电源架构提升组件的功率输出。结果:用仿真和实验得到了不同结构光伏组件的失配情况的最大可获得功率,并定量地分析了开关电容均衡器对光伏组件在失配条件下的净提升功率。结论:由仿真和实验结果可以得到开关电容均衡器能够在一定程度失配的情况下平均提升12.47%的最大功率输出,最大提升了150%,从而提高了光伏组件在失配时对太阳能的利用率。

Aims: Series configuration of photovoltaic cells and photovoltaic modules will lose part of their power in shadows or other mismatches and even generate hot spots. In this paper, a photovoltaic power architecture is studied to enhance the output energy of the modules under mismatches. Methods: A photovoltaic power supply architecture based on switch capacitor equalizers was adopted to improve the power output of modules. Results: The maximum available power of photovoltaic modules with different structures was obtained by simulation and experiment;and the net lifting power of switched capacitor equalizers under mismatch was quantitatively analyzed. Conclusions: According to the simulation and experimental results, it can be obtained that the switch capacitor equalizer can increase the maximum power output by 12.47% on average. It can increase the maximum power output by 150% and can improve the utilization rate of solar energy in the mismatch of photovoltaic modules.