基于BOOST-BUCK控制器的低壓控制系統(tǒng)

論文編號:ZD1306  論文字?jǐn)?shù):16624,頁數(shù):40  附任務(wù)書，開題報告，文獻(xiàn)綜述

基于BOOST-BUCK變換器的低壓控制系統(tǒng)
摘要：本文從提高光伏發(fā)電系統(tǒng)整體效率的角度出發(fā)，以光伏發(fā)電系統(tǒng)中電能變換裝置作為研究對象，研究光伏發(fā)電中的關(guān)鍵技術(shù)環(huán)節(jié)之一 ——光伏陣列的最大功率跟蹤點技術(shù)。主要研究適用于光伏發(fā)電系統(tǒng)的最大功率跟蹤變換器的拓?fù)洌谎芯抗夥�發(fā)電系統(tǒng)的最大功率點跟蹤變換器的控制方法。本文在分析研究了幾種基于DC/DC變換器的最大功率跟蹤算法及各自優(yōu)缺點和適用場合。在拓?fù)溲芯糠矫妫�分析研究了Buck、Boost和Boost-Buck電路應(yīng)用于光伏發(fā)電中的優(yōu)缺點以及適用的最佳功率等級，并對這三種電路的功率損耗進(jìn)行分析，通過仿真實驗進(jìn)行驗證。探討了把軟開關(guān)技術(shù)、三電平技術(shù)應(yīng)用于光伏發(fā)電的可行性，并詳細(xì)分析了應(yīng)用于光伏發(fā)電系統(tǒng)的Boost-Buck DC/DC變換器電路的換流過程。在理論分析的基礎(chǔ)上，將傳統(tǒng)的Buck變換器與Boost變換器相結(jié)合，采用變換器結(jié)合的方式，研究了一種雙開關(guān)Boost-Buck變換器。該變換器根據(jù)輸入輸出條件，可分別工作于Boost模式，Buck模式和臨界模式。與傳統(tǒng)的Boost-Buck變換器相比較，具有正極性的輸出電壓和更寬的輸入電壓范圍。仿真結(jié)果表明該電路性能良好。
關(guān)鍵字： 光伏發(fā)電系統(tǒng)  Boost-Buck變換器  DC/DC變換器   軟開關(guān)  三電平
        最大功率跟蹤點
The low-pressure starting systems based on boost-buck topology
Abstract: In order to improve the overall efficiency of photovoltaic power generation system, these articles close the conversion devices as a researcher goal and did some researches on the key Technologies of photovoltaic power generation—the maximum power point tracking techno- -logy of photovoltaic array. It did some major researches on the topology applicable to the  maximum power point tracking convector and on its control methods．Analyzing the principle and output characteristics of solar cells，this article introduced several maximum power point tracking algorithms based on the DC／DC convector and their respective advantages and dis- -advantages．On the topology research，this article analyzed the advantages and disadvantages of the Buck and Boost and BUCK-BOOST circuits when they were applied in the photovo- -ltaic power generation and summarized their best applicable power rating．Then it provedThe correctness of Theoretical calculation by simulation. Discussed the feasibility of the appl- -ication of soft-switch and three-level technology using in the photovoltaic power generation and detailed the converter process of the phase—BUCK-BOOST DC/DC converter. through the theoretical analysis，combine a traditional buck converter with a boost converter. The buck-boost converter includes a boost-voltage mode, a buck-voltage mode and a critical working mode in accordance with the input and output conditions. Compared with the tradi- -tional. buck-boost converter, its output voltage is positive and the input voltage ranges are wider. The simulation results prove that the buck-boost converter has good performance.
 Keywords:  PV generation system , buck-boost converter, DC／DC convector, soft-switch,  three-level technology, the maximum power point tracking

目  錄
摘要 I
Abstract II
第1章  緒論 1
 1.1 太陽能光伏發(fā)電技術(shù)簡介 1
 1.1.1 太陽能光伏發(fā)電的優(yōu)點 1
 1.1.2 太陽能光伏發(fā)電國內(nèi)外研究現(xiàn)狀與發(fā)展趨勢 1
 1.2 光伏發(fā)電系統(tǒng)簡介 2
 1.2.1 概述 2
 1.2.2 獨立太陽能光伏發(fā)電系統(tǒng) 2
 1.2.3 太陽能并網(wǎng)光伏發(fā)電系統(tǒng) 5
 1.3 光伏發(fā)電的核心技術(shù) 9
 1.4 影響光伏發(fā)電的主要因素及采取的措施 10
 1.5 本論文的目的和主要工作 10
第2章  光伏發(fā)電系統(tǒng)中的DC/DC變換器 12
 2.1 引言 12
 2.2 光伏發(fā)電中的DC/DC變換器的特點 12
 2.3降壓型BUCK電路 12
 2.3.1 Buck電路的優(yōu)缺點 13
 2.4升壓型BOOST電路 14
 2.4.1 Boost電路的優(yōu)缺點 15
 2.5升降壓斬波電路 15
 2.5.1升降壓斬波電路的優(yōu)點 16
 2.6雙開關(guān)Buck-Boost斬波電路 16
 2.6.1雙開關(guān)buck-boost斬波電路的工作原理 17
第3章  系統(tǒng)硬件設(shè)計 19
 3.1 控制器系統(tǒng)組成 19
 3.2 DC/DC變換器的參數(shù)設(shè)計 21
 3.2.1 輸入電容C1的設(shè)計 21
 3.2.2 輸出電容C2的設(shè)計 21
 3.2.3 電感L的設(shè)計 21
 3.2.4 開關(guān)管的設(shè)計 22
 3.2.5 二級管的設(shè)計 22
 3.3 DC/DC變換器的主電路結(jié)構(gòu) 22
 3.4 DC/DC變換器的控制電路的結(jié)構(gòu) 23
 3.4.1啟動電路 23
 3.4.2 調(diào)節(jié)和驅(qū)動電路 24
 3.4.3 電壓檢測電路 25
 3.4.4 電流檢測電路 26
 3.4.5 控制信號發(fā)生電路 27
 3.4.6 硬件保護(hù)電路 27
第4章 系統(tǒng)軟件設(shè)計 28
 4.1 TMS320LF2407DSP性能簡介 28
 4.2 軟件設(shè)計框架 29
第5章  結(jié)束語 32
參考文獻(xiàn) 33
致  謝 35