Microgrid system based on cell echelon utilization

Abstract

The invention discloses a microgrid system based on cell echelon utilization. The microgrid system comprises a solar cell panel component, a photovoltaic power generation access box, a direct current distribution manager, a microgrid energy storage cell and a photovoltaic power generation inverter. The photovoltaic power generation access box is connected with the solar cell panel component. The photovoltaic power generation access box, the microgrid energy storage cell and the photovoltaic power generation inverter are connected with the direct current distribution manager. The photovoltaic power generation access box, the microgrid energy storage cell and the photovoltaic power generation inverter are interconnected in parallel. The photovoltaic power generation inverter is connected with AC power utilization equipment. The microgrid energy storage cell comprises an echelon utilization power storage cell pack and a BMS controller. The echelon utilization power storage cell pack is formed by single power lithium cells of which the capacity is lower than the rated for 40%. Stable output of solar photovoltaic power generation can be enhanced and the electric energy quality of photovoltaic power generation can be enhanced, and application cost of cell energy storage can also be reduced.

Description

technical field [0001] The invention relates to the technical field of power lithium battery cascade utilization and photovoltaic microgrid system, in particular to a microgrid system based on battery cascade utilization. Background technique [0002] The definition of microgrid in my country is: microgrid is based on distributed power sources, using energy storage and control devices for real-time adjustment, and realizes the power supply network of internal power balance in the network. It can be connected to the grid or run independently off the grid. Microgrid utilizes primary energy, uses micro power sources, is usually equipped with energy storage devices, and uses power electronic devices for energy regulation. It is a small system that provides electric energy according to user needs. The power supply inside the microgrid is mainly responsible for energy conversion by power electronic devices and provides necessary control; the microgrid is a single controlled unit c...

AI Technical Summary

Problems solved by technology

The storage of solar energy mainly converts new energy into chemical energy, potential energy, kinetic energy, electromagnetic energy and other forms through certain technologies, so that the converted energy has the characteristics of space transfer or time transfer or quality control. The time and place are released in a suitable way; the most common energy storage method is battery energy storage, but the cost of battery energy storage is relatively high

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