智能化储能式可移动应急电源系统的研究与设计

发布时间：2017-12-31 12:29

本文关键词：智能化储能式可移动应急电源系统的研究与设计　出处：《华北电力大学》2015年硕士论文　论文类型：学位论文

【摘要】：社会的信息化和现代化正在飞速的发展,人们生活水平有了改善,用户对供电可靠性要求越来越高。应用在某些大型会场、建筑场所和政府机构等的供电系统一旦突然发生故障而不能正常供电,会造成重大的政治和经济损失。为了保障重点负荷不间断供电,维持正常稳定的社会和生活秩序,开展适用于重点负荷的移动式应急电源技术研究非常必要。随着现代电力电子技术的高速发展,应急电源技术水平有了很大的提高,保证了供电系统的安全性和可靠性。本文基于STM32F103嵌入式处理器设计了应急电源系统。首先分析了磷酸铁锂电池的化学反应机理和充放电特性,并结合实际应用,构建了一阶电池模型。其次剖析了几种常用的电池组均衡电路及其工作原理,通过对比其优缺点,选用了电感式无损均衡电路结构。然后利用matlab/simulink仿真软件对磷酸铁锂电池充放电过程、五段式充电模式、均衡控制过程、双电源快速切换等进行了建模与仿真。接着设计了应急电源系统和电池管理系统的总体结构,所设计的电池管理系统主要包括主控模块、电源供电模块、电压采集模块、电流采集模块、温度采集模块、均衡模块、双电源快速切换模块、充放电控制模块等。其中,采集模块用来实时采集电池组中各节电池电压和温度以及流过整个电池组的电流大小；均衡模块是根据所采集的电压值判断出电压最高和电压最低的电池,并进行能量传递,达到电池电压一致；双电源快速切换开关模块用来在2ms内实现主副电源之间的切换,达到不间断供电的目的；充放电控制模块用来切换整个电池组充放电回路的开合。最后,对应急电源系统的各个模块进行了软件设计。经过系统建模仿真与样机实际测试,结果表明所设计的应急电源系统达到了预期目标和要求。
[Abstract]:The information and modernization of the society are developing rapidly, people's living standard has been improved, and the users' demand for the reliability of power supply is higher and higher. Once the power supply system of construction sites and government agencies fails suddenly and can not supply electricity normally, it will cause great political and economic losses, and in order to ensure the uninterrupted power supply to the key load. To maintain a normal and stable society and order of life, it is necessary to study the technology of mobile emergency power supply suitable for key load. With the rapid development of modern power electronics technology. The technical level of emergency power supply has been greatly improved. The emergency power supply system is designed based on STM32F103 embedded processor. Firstly, the chemical reaction mechanism and charge-discharge characteristics of lithium iron phosphate battery are analyzed. Combined with practical application, the first order battery model is constructed. Secondly, several commonly used battery equalization circuits and their working principles are analyzed, and their advantages and disadvantages are compared. The inductive lossless equalization circuit structure is selected, and then the charging and discharging process, the five-stage charging mode and the equalization control process of lithium iron phosphate battery are simulated by matlab/simulink software. Then, the overall structure of emergency power supply system and battery management system is designed. The battery management system mainly includes main control module and power supply module. Voltage acquisition module, current acquisition module, temperature acquisition module, equalization module, double power fast switching module, charge and discharge control module. The acquisition module is used to collect the voltage and temperature of each cell in the battery pack in real time, as well as the size of the current flowing through the whole battery pack. The equalization module is the battery with the highest voltage and the lowest voltage according to the collected voltage value, and carries on the energy transfer, achieves the battery voltage consistent; The fast switching switch module of dual power supply is used to realize the switching between main and secondary power supply within 2 Ms to achieve the purpose of uninterruptible power supply. Charge and discharge control module is used to switch the battery charge and discharge circuit on and off. Finally, every module of the emergency power supply system is designed. The results show that the designed emergency power system has achieved the expected goals and requirements.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM912

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