A maximum power point tracking method, solar controller and related equipment

Abstract

The embodiment of the invention provides a maximum power point tracking method, a solar controller and related equipment. The maximum power point tracking method is used for dynamically tracking the maximum power point of a solar panel. According to the embodiment, after output voltage V corresponding to the maximum power point of the solar panel is determined, a Fibonacci sequence tracking methodis started, the value of an intermediate item in a Fibonacci sequence is taken as a disturbance value for disturbance, the direction of next disturbance and the magnitude of the disturbance value aredynamically adjusted according to the power variation trend after the disturbance, a disturbance step base of the voltage near the last maximum power point is dynamically adjusted by introducing theFibonacci sequence and utilizing convergence characteristics of the Fibonacci sequence, the latest maximum power point is quickly tracked, the efficiency of tracking the maximum power point in the dynamic variation process of a power voltage curve is improved, and the comprehensive utilization rate of solar energy is increased.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a maximum power point tracking method, a solar controller and related equipment. Background technique [0002] At present, the proportion of photovoltaic power generation in the world is increasing, and the improvement of the utilization rate and efficiency of solar energy is of great significance to the entire industry. Due to the working characteristics of photovoltaic panels, coupled with the different working conditions in various places, the change of sunlight intensity, etc., in order to improve the utilization rate of solar energy, it is particularly important to track the maximum output power operating point. [0003] At present, the most commonly used tracking technology in the industry is the single-peak MPPT algorithm. In practical applications, when the solar panel is blocked by clouds, trees, etc., the PV characteristic curve of the solar panel ...

AI Technical Summary

Problems solved by technology

[0003] At present, the most commonly used tracking technology in the industry is the single-peak MPPT algorithm. In practical applications, when the solar panel is blocked by clouds, trees, etc., the PV characteristic curve of the solar panel may have multiple peaks, so if it is only a single peak Tracking, the power point that may be tracked is only the local maximum power point, and the energy of the solar panel cannot be fully utilized

However, the existing multi-peak MPPT algorithm re-tracks the maximum power point only after a major change in the environment after determining the maximum power point. It does not dynamically track the maximum power point and cannot quickly respond to dynamic changes in the environment.

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