Method for improving power generation utilization rate of solar panel

Abstract

The invention is suitable for the field of solar power generation, and provides a method for improving the power generation utilization rate of a solar panel, which comprises the following steps that S1, a weak energy state defined value tracked by a maximum power point of a product is measured by a solar simulation module; S2, a signal processing module collects signal data; S3, a solar MPPT control module enters a charging state and tracks an approximate maximum power point according to theoretical calculation; S4, the solar MPPT control module compares the charging current of the solar MPPT control module with the defined value of the S1, tracks the maximum power point of the solar panel in a weak energy state and restarts at fixed time or tracks the maximum power point of the solar panel in a strong illumination high-power state at any time. The energy generated by the solar panel can be fully used, the maximum power point tracking efficiency is very high under the condition of strong illumination and high power, the excellent maximum power point tracking efficiency is also achieved under the condition of weak light and low power, the maximum power can be stably obtained under the scene that the voltage of the solar panel group string is too low, and the application is more flexible.

Description

technical field [0001] The invention belongs to the field of solar power generation, and particularly relates to a method for improving the utilization rate of solar panel power generation. Background technique [0002] During the operation of the solar power generation system, when the light radiation intensity is low in cloudy days or during the morning sunrise and evening sunset times, the power generation capacity of the solar panel is weak. At this time, the energy generated by the solar panel is not easy to capture. The common phenomenon is that the voltage of the solar panel is The MPPT controller or photovoltaic grid-connected inverter is rapidly pulled down, causing the MPPT controller or photovoltaic grid-connected inverter to stop working and then restart. Repeatedly repeating this action poses a challenge to the reliability of the auxiliary power supply of the product. It wastes the energy that the solar panel can generate, reduces the power generation utilizatio...

AI Technical Summary

Problems solved by technology

[0002] During the operation of the solar power generation system, when it is cloudy or when the light radiation intensity is low in the morning sunrise and evening sunset periods, the power generation capacity of the solar panels is weak. At this time, the energy generated by the solar panels is not easy to capture. The common phenomenon is that the voltage of the solar panels is reduced The MPPT controller or photovoltaic grid-connected inverter pulls down rapidly, so that the MPPT controller or photovoltaic grid-connected inverter stops working and then restarts. Repeating this action poses a challenge to the reliability of the auxiliary power supply of the product, and also It wastes the energy that solar panels can generate, reduces the utilization rate of solar panel power generation, and makes users mistakenly think that the equipment is faulty; in some special application scenarios, the solar panels that are allowed to be connected will be limited, and the maximum The power point voltage is lower than the battery voltage used for energy storage. When the MPPT controller is used to generate electricity, it is also prone to unstable phenomena that cannot track the maximum power point and restart continuously.

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