A micro-grid new energy hybrid energy storage system

Abstract

The invention provides a micro-grid new energy hybrid energy storage system which comprises a new energy power generation subsystem, an energy storage carrier subsystem, a converter subsystem, a high / low-voltage power distribution subsystem and a background monitor subsystem. According to the invention, battery equalization is performed through a BMS (battery management system), a cask effect caused by non-uniformity of voltage, capacity and other parameters is avoided, and the phenomena that the capacity of the whole group is reduced and the service life of the battery is shortened due to vicious circle of performance of the battery pack are avoided. Meanwhile, a refrigeration mode of air-conditioning equipment is scientifically controlled through a heat management system, so that the battery keeps a proper, uniform and stable environment temperature in the operating process. Therefore, the service life of the storage battery is prolonged, and the operating cost is effectively reduced. A container modular energy storage scheme is adopted, the system can be designed into a miniature temporary power generation system, and the construction investment is low. The system is convenient to use and can be transported into bad condition environments such as fields for performing power generation and supply under emergency circumstances. The system can be constructed into a large energy storage power station in a centralized mode, and the capacity is conveniently expanded.

Description

technical field [0001] The invention relates to a micro-grid new energy hybrid energy storage system. Background technique [0002] The current new energy storage system mainly has the following problems: [0003] 1. For a long time, the energy storage carrier has been the technical bottleneck in the development of new energy power generation systems. The energy storage battery is one of the most ideal energy storage carriers so far. The energy storage battery is unstable due to the use of temperature and the charging and discharging of the cells in the battery pack. Uniformity and other reasons lead to shortened life and increased operating costs; [0004] 2. During the use of the energy storage battery, the bad battery cannot be identified from the battery string in time, resulting in the failure of the entire battery pack to exert its effective performance, resulting in greater waste; [0005] 3. Under different light and temperature conditions, photovoltaic modules can...

AI Technical Summary

Problems solved by technology

[0003] 1. For a long time, the energy storage carrier has been the technical bottleneck in the development of new energy power generation systems. The energy storage battery is one of the most ideal energy storage carriers so far. The energy storage battery is unstable due to the use of temperature and the charging and discharging of the cells in the battery pack. Uniformity and other reasons lead to shortened life and increased operating costs;

[0004] 2. During the use of the energy storage battery, the bad battery cannot be identified from the battery string in time, resulting in the failure of the entire battery pack to exert its effective performance, resulting in greater waste;

[0005] 3. Under different light and temperature conditions, photovoltaic modules cannot maximize their power generation efficiency, and unnecessary losses are caused by factors such as short-board effects caused by shading;

[0006] 4. The energy storage batteries of the conventional system are connected to the converter subsystem through multiple sets of parallel connections, which may easily cause circulation between the battery packs and cause deviations in the performance of each battery pack, leading to a vicious circle

[0007] 5. In a general large-scale new energy power generation system, it is necessary to build infrastructure such as a computer room, which costs a lot of money, and once completed, it is difficult to expand capacity. In addition, the energy storage carrier is single, and cannot have multiple functions as a high-power starting power supply and a backup power supply for the motor at the same time.

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