大规模储能电池管理系统的研究

发布时间：2018-06-12 13:47

本文选题：大规模储能 + 电池管理系统　；参考：《广西大学》2014年硕士论文

【摘要】：电池储能系统在智能电网从发电到用电的各个环节得到广泛应用,其作用主要包括削峰填谷、作为缓冲装置,提高新能源并网能力。电池储能系统由电池、电池管理系统BMS、双向能量转换系统PCS、及监控系统等关键设备组成。电池管理系统是电池储能系统重要组成部分,因此,研究电池管理系统,对于延长电池使用寿命、降低运行成本等方面,具有重要意义。目前电池管理系统研发有不少厂商,但不同厂商的电池管理系统,在通信接口及通信协议方面存在较大差异,缺少统一化接口,导致电池管理系统可替换性和可维护性较差,同时也阻碍了电池管理系统的发展。针对规模储能特点,设计出电池管理系统。并将CANopen协议应用到电池管理系统上,实现电池管理系统通信接口标准化和统一化,任何支持CANopen协议的设备,都可以连接到电池管理系统CAN总线上,实现对电池管理系统的数据访问。解决了由于电池管理系统接口不统一,造成的电池管理设备可替换性差、难以与其他控制或管理设备直接对接、以及由此引发的国内电池管理系统发展缓慢的问题。以磷酸铁锂电池为例,研究了电池特性,测量并获取电池电压与SoC关系,电池内阻与SoC关系,在此基础上使用卡尔曼滤波算法估算电池SoC,并将此算法在电池管理系统中实现。电池管理单元主控芯片采用STM32F103C8T6,电压检测芯片采用LTC6803-3,电池簇管理系统采用基于PC/104总线工业控制计算机,电池管理单元与电池簇管理系统,共同组成电池管理系统。电池管理单元与电池簇管理系统之间采用CANopen协议通信,任何支持CANopen协议的设备,都可以连接到CAN总线上,读取电池管理系统参数。本文设计的电池管理系统,采用卡尔曼滤波算法估计电池SoC,实现电池各种数据采样、监测、显示、报警等多种功能,并将CANopen协议应用在电池管理系统上,方便电池管理单元与电池簇管理系统连接,解决了国内电池管理系统通信接口不统一,以及由此引发的一些问题,通过在“50kW储能接入系统”上实际测试,在CANopen通信一致性、电池电压和温度测量、SoC估算方面取得了很好效果。
[Abstract]:Battery energy storage system has been widely used in various aspects of smart grid from generation to power. Its function mainly includes cutting peak and filling valley, acting as buffer device, and improving the ability of new energy grid connection. Battery energy storage system consists of battery, battery management system (BMS), bidirectional energy conversion system (PCS), and monitoring system. Battery management system is an important part of battery energy storage system. Therefore, it is of great significance to study battery management system for prolonging battery life and reducing operation cost. At present, there are many manufacturers in battery management system research and development, but the battery management system of different manufacturers has great differences in communication interface and communication protocol, and the lack of unified interface leads to the poor replaceable and maintainability of battery management system. At the same time, it also hinders the development of battery management system. According to the characteristics of scale energy storage, the battery management system is designed. The CANopen protocol is applied to the battery management system to realize the standardization and unification of the communication interface of the battery management system. Any equipment supporting the CANopen protocol can be connected to the can bus of the battery management system. Realize the data access to the battery management system. It solves the problem that the battery management equipment is difficult to connect directly with other control or management equipment due to the lack of uniform interface of battery management system and the slow development of domestic battery management system. Taking the lithium iron phosphate battery as an example, the characteristics of the battery are studied, and the relationship between the battery voltage and SoC, the relationship between the battery internal resistance and the SoC is obtained. On this basis, the Kalman filter algorithm is used to estimate the SoC of the battery, and the algorithm is implemented in the battery management system. The battery management unit adopts STM32F103C8T6, the voltage detection chip uses LTC6803-3, the battery cluster management system adopts the industrial control computer based on PC-104 bus, the battery management unit and the battery cluster management system constitute the battery management system. The CANopen protocol is used between the battery management unit and the battery cluster management system. Any device supporting the CANopen protocol can be connected to the can bus to read the parameters of the battery management system. The battery management system designed in this paper uses Kalman filter algorithm to estimate the battery SoC, realizes various functions of battery data sampling, monitoring, display, alarm and so on, and applies CANopen protocol to the battery management system. It is convenient for the battery management unit to connect with the battery cluster management system. The communication interface of the domestic battery management system is not unified, and some problems arising therefrom are solved. Through the actual test on "50kW energy storage access system", the communication consistency in CANopen is obtained. Good results have been achieved in the estimation of cell voltage and temperature.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM912

【参考文献】