A Hierarchical Energy Storage Microgrid Containing Multiple Energy Storage Units

Abstract

The invention relates to the technical field of distributed power supply and micro-grid, and relates to a layered energy storage micro-grid comprising a plurality of energy storage units. The layered energy storage micro-grid is composed of a central control system, a centralized energy storage system, a micro-grid sub-grid control system, a micro-grid sub-grid and a switching device. A micro-grid system uses the combination of centralized energy storage and decentralized energy storage. Decentralized energy storage is used as a main micro source in the micro-grid. The centralized energy storage is used for power grid peak regulation and auxiliary services. In the case that the micro-grid sub-grid operates reliably and has no fault, the micro-grids of the sub-grid independently operates. The sub-grid control system monitors the state of micro-grid in real time, and uploads data to a centralized layer central control system. If a certain micro-grid sub-grid faces unstability or power imbalance, the centralized layer central control system, based on real-time data and control strategies, rationally deploys other micro-grid power supplies to be switched to the centralized energy storage to protect the micro-grid sub-grid to continue to operate. The layered energy storage micro-grid can improve the safe and reliable operation of micro-grid and reduces power consumption and hardware loss.

Description

technical field [0001] The invention belongs to the technical field of distributed power sources and microgrids, and in particular relates to a hierarchical energy storage microgrid comprising a plurality of energy storage units. Background technique [0002] With the rapid development of the world economy and industry, the global demand for energy is also increasing rapidly, and the damage to the environment caused by the massive consumption of energy has become increasingly prominent. However, global warming is serious, and the frequent occurrence of El Niño phenomenon continues to threaten the living conditions of human beings. Therefore, it is of great significance to develop clean energy, improve the utilization rate of distributed power generation, and enable mankind to enter a new era of distributed power supply from the traditional centralized power supply era. Distributed power generation has many advantages such as less pollution, high reliability, high energy uti...

AI Technical Summary

Problems solved by technology

Due to the limitations of resources, loads, sites and other factors, the construction of micro-grids tends to be miniaturized and decentralized. When micro-grids operate independently, they only satisfy their own self-sufficiency. Distributed power sources cannot achieve optimal allocation of resources among multiple micro-grids. User load can not get the maximum power supply guarantee

Due to the randomness, volatility and uncontrollability of distributed power generation, the good configuration of a single microgrid is sometimes difficult to meet the requirements during operation.

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