内容：
在温室中引入可再生能源,能够极大地促进温室的节能减排。针对温室室顶安装的太阳能电池板,可能出现的局部遮阴或光强分布不均而造成的光伏阵列失配及热斑现象等问题,采取了一种新型的两阶段光伏最大功率点跟踪(MPPT)控制方法。该方法将光伏系统产生的阻抗偏差以及偏差的变化率作为模糊控制的输入,输出量为下一时刻的占空比调整步长,从而控制负载大小,实现最大功率点的跟踪控制。此外,基于系统初次寻优时间、环境改变后的二次寻优时间,以及功率的振幅为MPPT的性能指标,在仿真环境和试验平台下对提出的控制方法进行分析对比,结果表明:所提出的模糊优化等效阻抗匹配法具有较快的寻优速度和较高的稳态精度。The introduction of renewable energy in the greenhouse, can greatly promote greenhouse energy conservation. In order to solve the problem of PV array mismatch and hot spot phenomenon caused by the local shading or uneven intensity distribution of solar panels installed in the greenhouse, a new type of two-stage photovoltaic maximum power point tracking ( MPPT) control method. This method uses the change of the impedance of the PV system and the change rate of the deviation as the input of the fuzzy control. The output is the duty cycle adjustment step of the next time, thus controlling the load size and realizing the tracking control of the maximum power point. In addition, based on the initial optimization time of the system, the secondary optimization time after the environment change and the amplitude of the power are MPPT performance indicators, the proposed control method is analyzed and compared in the simulation environment and the test platform. The results show that The fuzzy optimization equivalent impedance matching method has faster optimization speed and high steady - state accuracy.

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