Dynamic maximum power point tracking technology based on power prediction

Abstract

The invention belongs to the fields of new energy development and power system optimization, and relates to a dynamic maximum power point tracking technology based on power prediction. The dynamic maximum power point tracking technology based on the power prediction comprises the steps that output power of a photovoltaic cell is predicted by a power prediction method under the same voltage condition; and a perturbation step size of a perturbation and observation method is adjusted dynamically and in real time by a method that the step size changes along with a difference value between output power and a maximum power point of a photovoltaic power generation system. According to the dynamic maximum power point tracking technology based on the power prediction, the misjudgment problem existing in the perturbation and observation method can be solved, the oscillation problem of the perturbation and observation method at the maximum power point position is solved, and power generation efficiency and working stability of the photovoltaic cell are improved.

Description

technical field [0001] The patent of the present invention relates to the dynamic maximum power point tracking technology based on power prediction, specifically, it relates to the research on the maximum output power of the photovoltaic power generation system, which belongs to the field of new energy development and power system optimization. Background technique [0002] With the increasingly serious environmental pollution caused by the burning of fossil fuels and the increasing demand for energy, countries around the world have reached a consensus on the development and utilization of renewable energy. Solar energy is the most common and utilized energy in human life. Among all new energy sources, solar energy has attracted the attention of scientists due to its unique advantages. Abundant solar energy is utilized by humans through photovoltaic power generation. The development of photovoltaic power generation industry is being vigorously promoted all over the world, bu...

AI Technical Summary

Problems solved by technology

This algorithm is easy to implement, and there are few parameters to set, but in practical applications, it is only tracked by a simple comparison of the power. If the system is already running at the maximum power point, it still needs to be judged by changing the position of the operating point. The tracking direction of the next step will easily cause the system to misjudge; if the system works near the maximum power point, it may miss the maximum power point when it continues to track, which will cause the system to oscillate near the maximum power point all the time. Both situations will lead to the reduction of photovoltaic cell power generation efficiency

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