本文選題：應急電源 + 逆變電源��； 參考：《電子科技大學》2015年碩士論文

【摘要】：在現代社會中,電力供應對人們日常生活的影響越來越大。應急電源可以在公用電網中斷時為負載持續(xù)供電,保障了用戶在對電能的需求,因而應用越來越廣泛。近年來,隨著太陽能發(fā)電技術的發(fā)展,將太陽能發(fā)電技術應用到蓄電池儲能系統(tǒng)逐漸成為應急電源發(fā)展的一個重要趨勢。本文對光伏儲能應急電源系統(tǒng)進行了研究,系統(tǒng)由光伏充電系統(tǒng),常規(guī)充電系統(tǒng)和逆變電源系統(tǒng)構成。利用太陽能充電系統(tǒng)和常規(guī)式充電系統(tǒng)完成了蓄電池的儲能,多樣的充電方式使應急電源系統(tǒng)的可靠性和供電質量大大提高,延長了供電時間。首先,介紹了光伏儲能應急電源系統(tǒng)的總體設計方案,闡述了應急電源系統(tǒng)的構成和工作原理,對不同情況下應急電源的工作過程做了具體的說明,并說明了技術指標和各組成部分的設計要求。其次,對應急電源的逆變系統(tǒng)進行了詳細的分析。根據技術指標,選擇升壓-逆變電路作為主電路拓撲。確定了逆變電路和Boost電路的拓撲結構,詳細分析了開關管,電感電容等元器件的選型,給出了推導公式。闡述了開關管驅動電路的設計。同時,介紹了逆變電路的SPWM控制原理,說明了SPWM波的生成過程。設計了電壓負反饋閉環(huán)控制系統(tǒng),確保了逆變器輸出了穩(wěn)定。給出了系統(tǒng)軟件設計的流程圖。第三,介紹了蓄電池組的充電電路。說明了蓄電池的充電特性。通過對各個充電方法的比較,選取了“恒壓-恒流-浮充”三段式充電方法。并設計了充電電路。構建了電池電壓和電流采樣電路,組成了三段式充電系統(tǒng)。通過蓄電池的充電實驗,驗證了充電方法的可行性。第四,對光伏電池的原理做了詳細的說明。給出了光伏電池的等效模型和詳細的推導公式。根據數學模型,確定了光伏電池的輸出特性。比較了常見的幾種MPPT控制方法,選擇了擾動觀察法。給出了通過光伏電池對蓄電池充電的充電電路和控制框圖,并在Matlab/simulink中進行了建模和仿真,確定的光伏儲能充電方法的有效性。最后,建立了應急電源的實驗樣機。對逆變電路和充電電路進行了聯合調試.通過對驅動和輸出的波形的觀察,證明應急電源達到了了設計的技術指標,實現了預期的功能。
[Abstract]:In modern society, electricity supply has more and more influence on people's daily life. The emergency power supply can supply the load continuously when the public power network is interrupted, which ensures the user's demand for electric energy, so it is used more and more widely. In recent years, with the development of solar power generation technology, the application of solar power generation technology to battery energy storage system has gradually become an important trend of the development of emergency power supply. In this paper, the photovoltaic energy storage emergency power supply system is studied. The system consists of photovoltaic charging system, conventional charging system and inverter power supply system. Solar charging system and conventional charging system are used to store energy of battery. The reliability and power supply quality of emergency power supply system are greatly improved by various charging methods and the power supply time is prolonged. First of all, the paper introduces the overall design scheme of the photovoltaic energy storage emergency power supply system, expounds the structure and working principle of the emergency power supply system, and gives a specific explanation of the working process of the emergency power supply under different conditions. The technical specifications and the design requirements of each component are also described. Secondly, the inverter system of emergency power supply is analyzed in detail. According to the technical specifications, the boost-inverter circuit is selected as the main circuit topology. The topology of inverter circuit and boost circuit is determined, and the selection of switch, inductance and capacitance is analyzed in detail, and the derivation formula is given. The design of switch-tube drive circuit is described. At the same time, the SPWM control principle of inverter circuit is introduced, and the generation process of SPWM wave is explained. A voltage negative feedback closed loop control system is designed to ensure the output stability of the inverter. The flow chart of system software design is given. Thirdly, the charging circuit of battery group is introduced. The charging characteristics of battery are explained. Through the comparison of various charging methods, the "constant voltage-constant current-floating charging" three-stage charging method is selected. The charging circuit is designed. A battery voltage and current sampling circuit is constructed, and a three-stage charging system is formed. The feasibility of the charging method is verified by the battery charging experiment. Fourthly, the principle of photovoltaic cells is explained in detail. The equivalent model and derivation formula of photovoltaic cell are given. According to the mathematical model, the output characteristics of photovoltaic cells are determined. Several common MPPT control methods are compared, and disturbance observation method is chosen. The charging circuit and control block diagram of battery charging by photovoltaic cell are given, and the modeling and simulation in Matlab / Simulink are carried out. The validity of the method is determined. Finally, the experimental prototype of emergency power supply is established. The inverter circuit and charging circuit are debugged jointly. Through the observation of the driving and output waveforms, it is proved that the emergency power supply has achieved the technical target of the design and realized the expected function.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM914.4
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本文編號：2060114