Multi-agent lithium battery cluster energy storage system

Abstract

The invention provides a multi-agent lithium battery cluster energy storage system. According to the system, a mathematical model is established through rated capacities, actual capacities and output / input characteristics of different types of lithium batteries; each lithium battery energy storage unit forming the cluster system is provided with a communication module and an analysis module, can realize mutual communication and has certain functions of data processing and analysis and instruction receiving and sending. According to the lithium battery cluster energy storage system, a double-loop control mode is adopted, an inner loop is a self-adjusting loop based on a single module, self-feedback is carried out according to parameters such as the state of charge and the temperature, and then power adjustment is achieved. The outer ring is a system adjusting ring, the battery which most meets the operation requirement in the same kind of batteries is set as a host through mutual communication between the lithium batteries, and based on the consistency principle, other lithium battery packs in the system are controlled to perform self-adjustment, so that the energy storage or energyrelease power of the lithium battery packs is approximately consistent with the ratio of the charge-discharge margin. On the premise of ensuring safety, stable and efficient operation of the energy storage system is realized.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a multi-agent lithium battery cluster energy storage system. Background technique [0002] With the large-scale access of renewable energy represented by wind and light in the future, the randomness, intermittency, and volatility of its output will increase the uncertainty of renewable energy per unit time faced by the power system. At the same time, the economy has grown steadily in recent years, and electricity consumption has also shown an upward trend year by year. The abnormal operation of the power grid caused by the imbalance between supply and demand seriously endangers the safety, stability, reliability and economy of the power grid. [0003] In order to solve the above problems, vigorously developing energy storage technology is an inevitable choice for the development of the power industry in the future. Lithium batteries not only have the characteristics of hi...

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Problems solved by technology

[0004] 1. Lithium batteries belong to electrochemical energy storage, and the chemical substances in them will attenuate to varying degrees after several energy conversions. In the traditional large-scale cluster utilization, because all batteries execute the same single command, the service life of some batteries will be significantly reduced. At the same time, it also makes some batteries with good performance unable to maximize the energy storage effect, affecting the overall working efficiency of the system

[0005] 2. The control methods of the traditional lithium battery cluster energy storage system are master-slave control, but the battery itself has a certain degree of physical difference, and in the process of use, its working performance will also change when the capacity decays to different degrees, and the performance is excellent The slave machine will be largely affected by the host machine. At the same time, the traditional centralized control will analyze the signal, obtain the operating status of a single lithium battery energy storage module, and then calculate and issue instructions one by one, which will cause a certain delay. , There is a sluggish response in application scenarios with high speed, which is not conducive to the performance of its adjustment performance

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