本文關鍵詞：智能化儲能式可移動應急電源系統(tǒng)的研究與設計　出處：《華北電力大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 應急電源 磷酸鐵鋰電池 均衡 電池管理系統(tǒng)

【摘要】：社會的信息化和現(xiàn)代化正在飛速的發(fā)展,人們生活水平有了改善,用戶對供電可靠性要求越來越高。應用在某些大型會場、建筑場所和政府機構(gòu)等的供電系統(tǒng)一旦突然發(fā)生故障而不能正常供電,會造成重大的政治和經(jīng)濟損失。為了保障重點負荷不間斷供電,維持正常穩(wěn)定的社會和生活秩序,開展適用于重點負荷的移動式應急電源技術(shù)研究非常必要。隨著現(xiàn)代電力電子技術(shù)的高速發(fā)展,應急電源技術(shù)水平有了很大的提高,保證了供電系統(tǒng)的安全性和可靠性。本文基于STM32F103嵌入式處理器設計了應急電源系統(tǒng)。首先分析了磷酸鐵鋰電池的化學反應機理和充放電特性,并結(jié)合實際應用,構(gòu)建了一階電池模型。其次剖析了幾種常用的電池組均衡電路及其工作原理,通過對比其優(yōu)缺點,選用了電感式無損均衡電路結(jié)構(gòu)。然后利用matlab/simulink仿真軟件對磷酸鐵鋰電池充放電過程、五段式充電模式、均衡控制過程、雙電源快速切換等進行了建模與仿真。接著設計了應急電源系統(tǒng)和電池管理系統(tǒng)的總體結(jié)構(gòu),所設計的電池管理系統(tǒng)主要包括主控模塊、電源供電模塊、電壓采集模塊、電流采集模塊、溫度采集模塊、均衡模塊、雙電源快速切換模塊、充放電控制模塊等。其中,采集模塊用來實時采集電池組中各節(jié)電池電壓和溫度以及流過整個電池組的電流大��；均衡模塊是根據(jù)所采集的電壓值判斷出電壓最高和電壓最低的電池,并進行能量傳遞,達到電池電壓一致；雙電源快速切換開關模塊用來在2ms內(nèi)實現(xiàn)主副電源之間的切換,達到不間斷供電的目的；充放電控制模塊用來切換整個電池組充放電回路的開合。最后,對應急電源系統(tǒng)的各個模塊進行了軟件設計。經(jīng)過系統(tǒng)建模仿真與樣機實際測試,結(jié)果表明所設計的應急電源系統(tǒng)達到了預期目標和要求。
[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.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM912

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本文編號：1359799