Maximum power point tracking method and device based on simulated annealing algorithm

Abstract

The invention discloses a maximum power point tracking method based on a simulated annealing algorithm, and the method comprises the steps: taking the simulated annealing algorithm as a frame, taking an output voltage average value of a photovoltaic unit as an initial value, and carrying out the iterative calculation until a voltage reference value for achieving the maximum power output of the photovoltaic unit is obtained; in the iterative calculation process, a three-level detection method is introduced to solve the problem that repeated iteration exists in the simulated annealing algorithm at low temperature, and therefore the situation that a local optimal solution exists in an output result is avoided. The invention further provides a maximum power point tracking device based on the maximum power point tracking method. According to the method provided by the invention, the maximum power point of the photovoltaic unit can be quickly obtained through iterative calculation, so that the power supply stability and high-efficiency operation of the photovoltaic unit are ensured.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a maximum power point tracking method and device based on a simulated annealing algorithm Background technique [0002] With the establishment of the carbon neutral goal of peak carbon, China has begun to focus on building a new power system with new energy as the main body, which means that the development of new energy represented by photovoltaics and wind power will be further accelerated. For photovoltaic power generation, due to the uncertainty of sunshine duration and intensity, the output power of photovoltaic units also fluctuates all the time. In order to further exert the efficiency of photovoltaic power generation, a maximum power point tracking (MPPT) method is usually introduced, which can track the maximum power point in the solar panel in real time, so as to exert the maximum effect of the solar panel. However, the existing MPPT method has poor...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a maximum power point tracking method based on a simulated annealing algorithm. This method uses the classical simulated annealing method as a framework to regulate the output power of the photovoltaic unit, and introduces "three-level detection" to solve the problem. The simulated annealing algorithm has the problem of repeated iterations at low temperatures, so as to avoid the problem of local optimal solutions in the output results, so that the output power corresponding to the final output voltage is the maximum output power under the current light, ensuring the normal operation of electrical equipment

Images