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

【摘要】：在現(xiàn)代社會(huì)中,電力供應(yīng)對(duì)人們?nèi)粘Ｉ畹挠绊懺絹?lái)越大。應(yīng)急電源可以在公用電網(wǎng)中斷時(shí)為負(fù)載持續(xù)供電,保障了用戶在對(duì)電能的需求,因而應(yīng)用越來(lái)越廣泛。近年來(lái),隨著太陽(yáng)能發(fā)電技術(shù)的發(fā)展,將太陽(yáng)能發(fā)電技術(shù)應(yīng)用到蓄電池儲(chǔ)能系統(tǒng)逐漸成為應(yīng)急電源發(fā)展的一個(gè)重要趨勢(shì)。本文對(duì)光伏儲(chǔ)能應(yīng)急電源系統(tǒng)進(jìn)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(gòu)成。利用太陽(yáng)能充電系統(tǒng)和常規(guī)式充電系統(tǒng)完成了蓄電池的儲(chǔ)能,多樣的充電方式使應(yīng)急電源系統(tǒng)的可靠性和供電質(zhì)量大大提高,延長(zhǎng)了供電時(shí)間。首先,介紹了光伏儲(chǔ)能應(yīng)急電源系統(tǒng)的總體設(shè)計(jì)方案,闡述了應(yīng)急電源系統(tǒng)的構(gòu)成和工作原理,對(duì)不同情況下應(yīng)急電源的工作過(guò)程做了具體的說(shuō)明,并說(shuō)明了技術(shù)指標(biāo)和各組成部分的設(shè)計(jì)要求。其次,對(duì)應(yīng)急電源的逆變系統(tǒng)進(jìn)行了詳細(xì)的分析。根據(jù)技術(shù)指標(biāo),選擇升壓-逆變電路作為主電路拓?fù)洹４_定了逆變電路和Boost電路的拓?fù)浣Y(jié)構(gòu),詳細(xì)分析了開(kāi)關(guān)管,電感電容等元器件的選型,給出了推導(dǎo)公式。闡述了開(kāi)關(guān)管驅(qū)動(dòng)電路的設(shè)計(jì)。同時(shí),介紹了逆變電路的SPWM控制原理,說(shuō)明了SPWM波的生成過(guò)程。設(shè)計(jì)了電壓負(fù)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(shè)計(jì)的流程圖。第三,介紹了蓄電池組的充電電路。說(shuō)明了蓄電池的充電特性。通過(guò)對(duì)各個(gè)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(shè)計(jì)了充電電路。構(gòu)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(guò)蓄電池的充電實(shí)驗(yàn),驗(yàn)證了充電方法的可行性。第四,對(duì)光伏電池的原理做了詳細(xì)的說(shuō)明。給出了光伏電池的等效模型和詳細(xì)的推導(dǎo)公式。根據(jù)數(shù)學(xué)模型,確定了光伏電池的輸出特性。比較了常見(jiàn)的幾種MPPT控制方法,選擇了擾動(dòng)觀察法。給出了通過(guò)光伏電池對(duì)蓄電池充電的充電電路和控制框圖,并在Matlab/simulink中進(jìn)行了建模和仿真,確定的光伏儲(chǔ)能充電方法的有效性。最后,建立了應(yīng)急電源的實(shí)驗(yàn)樣機(jī)。對(duì)逆變電路和充電電路進(jìn)行了聯(lián)合調(diào)試.通過(guò)對(duì)驅(qū)動(dòng)和輸出的波形的觀察,證明應(yīng)急電源達(dá)到了了設(shè)計(jì)的技術(shù)指標(biāo),實(shí)現(xiàn)了預(yù)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(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM914.4
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本文編號(hào)：2060114