Solar power supply system with a plurality of battery packs

Abstract

Provided is a solar power supply system with a plurality of battery packs. The solar power supply system with the battery packs comprises main-and-auxiliary double solar cell panels, a plurality of lithium battery pack energy storage elements, a front end DC / DC voltage change circuit, charging and power supply management circuits, a rear end DC / DC voltage change circuit, an electric quantity detection circuit, corresponding battery protection circuits and a central processing unit CPU. The lithium battery packs are adopted and serve as the energy storage elements, the CPU is used for carrying out energy management on each lithium battery pack, and even when one lithium battery is abnormal, normal operation of the solar power supply system cannot be influenced. Meanwhile, due to the fact that the working mode of the main-and-auxiliary double solar cell panels is adopted, when the main-and-auxiliary double solar cell panels are applied on site, the auxiliary solar cell panel is configured as needed, and flexible configuration of model selection of the solar cell panels can be accomplished. When the solar power supply system with battery packs is used for carrying out charging, efficient charging is carried out on the lithium battery packs according to an MPPT control method, according to the result after the solar power supply system with battery packs is tried out, a power system is good in operation, and the strong guarantee is provided for dynamic improvement of the capacity of power transmission lines, and the stability and the reliability of the solar power supply system.

Description

technical field [0001] The invention relates to solar power supply, in particular to a multi-battery solar power supply system Background technique [0002] Because the operating environment of the transmission line online monitoring device is very harsh, the reliability of the power supply directly determines the performance of the entire monitoring device. [0003] There are three main methods of power acquisition for existing transmission lines: induction power acquisition, solar energy and wind energy. Inductive power acquisition mainly obtains energy directly from the transmission line through the principle of electromagnetic induction. This method is only applicable to the power acquisition method on the high-voltage side; wind energy uses wind power to drive a small generator to work to generate energy. Inspection and maintenance are difficult to guarantee, thus reducing the reliability of wind energy harvesting; solar energy is a power harvesting method that convert...

AI Technical Summary

Problems solved by technology

[0004] ①The selection of solar panels is difficult to meet the needs of on-site operation

Due to the limited space for installing solar panels on transmission line towers, solar panels cannot work in the best state in most cases. At the same time, due to the wide geographical distribution of transmission line on-line monitoring devices, the sunshine intensity varies greatly between different towers. In engineering applications, there is usually a large margin to meet different situations, even if there are still a few cases where the power supply of a few monitoring devices is insufficient and the system is unstable;

[0005] ②The reliability of the power management system is low

At present, most solar power supply systems use single batteries as energy storage. Once the battery is abnormal, the entire power supply will fail.

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