Energy storage system based on modular echelon utilization

Abstract

The invention discloses an energy storage system based on modular echelon utilization. The energy storage system comprises a solar cell panel assembly, a photovoltaic power generation access box, a direct current distribution manager, a microgrid energy storage battery and a photovoltaic power generation inverter, the photovoltaic power generation access box is connected with the solar cell panel assembly, the photovoltaic power generation access box, the microgrid energy storage battery and the photovoltaic power generation inverter are all connected with the direct current distribution manager, and the photovoltaic power generation access box, the microgrid energy storage battery and the photovoltaic power generation inverter are connected in parallel. The photovoltaic power generation inverter comprises an inverter body, a low-pass filter, a sampling conditioning circuit, a driving protection circuit and a digital controller, and the echelon utilization power storage battery pack is composed of single power lithium batteries with the capacity lower than rated 40%. According to the invention, the stable output of solar photovoltaic power generation can be improved, the electric energy quality of photovoltaic power generation can be improved, and the application cost of battery energy storage can be reduced.

Description

Technical field [0001] The invention relates to the technical fields of power lithium battery ladder utilization and photovoltaic microgrid systems, in particular to an energy storage system based on modular ladder utilization. Background technique [0002] An energy storage device, which can use power electronics for energy regulation, is a small system that provides electrical energy according to user demand. [0003] Solar energy is an inexhaustible renewable energy source for mankind. It has a series of outstanding advantages such as completely clean, absolutely safe, relatively widespread, sufficient resources, economical and practical, long life and maintenance-free. 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 being transferable in space, transferable in time, or controllable in q...

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