Maximum power point implementation method and device base on three-level step length
A technology of maximum power point and three-level step size, which is applied in photovoltaic power generation, instruments, and electric variable adjustment, can solve problems such as misjudgment and tracking time, achieve rapidity and accuracy, prevent misjudgment, and improve rapidity. Effects of Tracking Properties
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[0038] In order to better illustrate the present invention, the present invention will be described in detail with a preferred embodiment and with accompanying drawings, specifically as follows:
[0039] Such as figure 1 As shown, it is a schematic diagram of the composition and structure of the maximum power point realization device based on the three-level step size provided by the present invention, including:
[0040] The sampling module 101 is used to sample the output voltage and output current of the photovoltaic array of the system, U(k) represents the output voltage of the kth (k=0,1,2,...,k) sampling, I(k) Indicates the output current of the kth (k=0,1,2,...,k) sampling, and calculates P(k) according to U(k) and I(k);
[0041] The power tracking selection module 102 is used to judge whether U(k) is less than Um, if so, then start the constant voltage method tracking module, otherwise start the disturbance observation method tracking module;
[0042] The constant vo...
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