A photovoltaic thermoelectric mppt control method, system, device and storage medium

Abstract

A photovoltaic thermoelectric MPPT control method disclosed by the present invention includes the following steps: obtaining the step data of the photovoltaic thermoelectric coupling system through a step counter; judging the total power of the current photovoltaic power generation and thermoelectric power generation and the photovoltaic power generation and thermoelectric power generation of the previous disturbance cycle The size of the total power, according to the difference between the current total power and the total power of the previous disturbance period, the step counter is processed; the temperature difference and voltage difference between the current period of the system and the previous disturbance period are obtained, and according to the difference between the temperature difference and the voltage difference The size of the product, temperature difference and voltage difference determines the given value of the step size of the next disturbance cycle; the step size ratio is determined according to the calculation result of the step size counter; by determining the step size ratio, a stable maximum power is obtained to realize the photovoltaic thermoelectric MPPT control.

Description

technical field [0001] The invention relates to the research field of photovoltaic thermoelectric technology, in particular to a photovoltaic thermoelectric MPPT control method, system, equipment and storage medium. Background technique [0002] The power generation of photovoltaic thermoelectric coupling system is affected by the power of photovoltaic power generation and thermoelectric power generation. The maximum power of the coupled system is not only affected by the maximum power of a single power generation system, but the maximum value of the sum of the power generation of the two coupled systems. The maximum efficiency tracking of a single system cannot track the maximum efficiency of the overall system. At the same time, the output power characteristics of photovoltaic cells are highly nonlinear. The maximum output power and the voltage and current at the maximum output power point vary with the temperature of the photovoltaic cell, the intensity of light, and the ...

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Problems solved by technology

[0004] The object of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a photovoltaic thermoelectric MPPT control method, control system and storage medium, according to the size of the previous power given value Pn and the power given value Pn-1 of the previous disturbance cycle Compare the results and the size of the system temperature difference ΔT to adjust the disturbance step size in real time and determine the power reference value Pn+1 for the next disturbance cycle, so as to solve the problem that the traditional disturbance observation method cannot track the maximum power point of the photovoltaic thermoelectric coupling system. The thermoelectric coupling system has a low tracking efficiency for the maximum power point and cannot track the maximum power of the system, so that the output power of the photovoltaic thermoelectric coupling system can find the maximum power point and stabilize at the maximum power point as soon as possible, which has better dynamic performance and stability. state performance

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