基于STM32的光伏MPPT的研究与设计

Wu Dengsheng, Wang Lidi, Han Chuncheng, Liu Tong, Zhou Chenglong, Lingxi Chenyang
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引用次数: 1

摘要

针对光伏发电最大功率点跟踪(MPPT)问题,结合农村光伏供热系统温度调节的目的,提出了基于可调负荷电阻匹配模型的最大功率点跟踪方法。分析了光伏电池的输出特性和负载匹配原理,采用摄动观测(P&O)方法实现了光伏发电的最大功率。将加热设备作为电阻性负载,设计一组可由继电器控制的宽量程、小步长电阻进行测试。最后,以STM32为核心处理器,通过调整步长,跟踪光伏输出电压的变化,使控制器能够准确跟踪外部环境的变化,即有效跟踪光伏发电系统的最大功率点。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research and Design of PV MPPT Based on STM32
Aiming at the problem of maximum power point tracking (MPPT) of PV power generation, combined with the purpose of temperature adjustment of rural PV heating system, the MPPT method based on the model of adjustable load resistance matching is proposed. The output characteristics of PV cells and the principle of load matching are analyzed, and the MPPT of PV generation is realized by perturbation and observation (P&O) method. Regarding the heating equipment as the resistive load, a group of resistors with a wide range and small step length which can be controlled by the relay are designed to test. Finally, taking STM32 as the core processor, adjusting the step size and tracking the change of PV output voltage, the controller can track the change of the external environment accurately, that is, it can track the maximum power point of a PV power system effectively.
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