本文選題：變換器　切入點：阻抗匹配　出處：《華南理工大學》2014年博士論文

【摘要】：通過對電力電子變換器的控制，電力電子技術可實現(xiàn)電能不同形式的轉(zhuǎn)換，為此電力電子變換器成為電力電子技術的關鍵，構(gòu)造高性能的電力電子變換器始終是電力電子技術最基礎的研究工作。本文從阻抗匹配角度研究了阻抗網(wǎng)絡對變換器性能的影響，分析了電力電子變換器的阻抗網(wǎng)絡匹配機理，形成一種阻抗型變換器的系統(tǒng)設計方法，由此構(gòu)造出4種新型的Z阻抗網(wǎng)絡變換器拓撲。 本文所完成的工作具體體現(xiàn)在以下幾個方面： (1)根據(jù)阻抗網(wǎng)絡理論，分析傳統(tǒng)電壓源和電流源逆變器存在的問題，進而剖析阻抗網(wǎng)絡對基本Z源變換器、準Z源變換器、耦合型Z源變換器和電源內(nèi)嵌型Z源變換器工作性能的影響，為此更加深入認識以Z源變換器為代表的阻抗型變換器構(gòu)造機理。 (2)首次提出了輸入阻抗匹配、輸出阻抗匹配、負載相位匹配的電力電子變換器阻抗網(wǎng)絡匹配機理�；谠摍C理，可以通過阻抗網(wǎng)絡參數(shù)的設計，匹配變換器的工作性能，提高和改變變換器輸出特性，由此形成了一種阻抗型變換器的系統(tǒng)設計方法，促進了阻抗型變換器的發(fā)展。 (3)根據(jù)阻抗匹配變換器的設計方法，構(gòu)造了兩種新型的3-Z阻抗網(wǎng)絡DC-DC升壓變換器，它們利用多個相同Z阻抗網(wǎng)絡串聯(lián)匹配的方式，使得輸出阻抗呈現(xiàn)負阻抗特性，進而大幅度提高了變換器的升壓比，理論上可達到350倍，解決了光伏電池輸出低電壓需升壓的問題。 (4)構(gòu)造了一種新型的Z阻抗網(wǎng)絡半橋變換器，該變換器巧妙地將阻抗網(wǎng)絡嵌入到半橋變換器中，等效提高了輸入阻抗，有效穩(wěn)定了半橋變換器輸入電容的中點電壓，解決了電化學電源寬負載范圍工作的苛刻要求。 (5)構(gòu)造了一種新型的雙輸出Z阻抗網(wǎng)絡半橋變換器，該變換器利用兩個阻抗網(wǎng)絡并聯(lián)匹配的設計，等效降低了輸出阻抗，減少了四分之一的開關元件和電容，實現(xiàn)了雙負載輸出的要求，，有效降低了電動汽車驅(qū)動電源成本，同時提高了它的功率密度。 論文的創(chuàng)新之處在于從一個新的視角，深入剖析了以Z源變換器為代表的阻抗型變換器的構(gòu)造機理，提出了一種具有一般意義的阻抗型變換器的構(gòu)造方法，推動了電力電子變換器設計的系統(tǒng)化，具有明顯的理論和實際應用價值。
[Abstract]:Through the control of power electronic converter, power electronic technology can realize different forms of power conversion, so power electronic converter becomes the key of power electronics technology.The construction of high performance power electronic converters is always the most basic research work of power electronics technology.In this paper, the influence of impedance network on converter performance is studied from the angle of impedance matching, and the impedance network matching mechanism of power electronic converter is analyzed, and a system design method of impedance converter is formed.Therefore, four new Z-impedance network converters are constructed.The work accomplished in this paper is embodied in the following aspects:1) according to the theory of impedance network, the problems of traditional voltage source and current source inverter are analyzed, and the impedance network is applied to the basic Z-source converter and quasi-Z-source converter.Because of the influence of the performance of the coupled Z-source converter and the power source embedded Z-source converter, the construction mechanism of the impedance converter represented by the Z-source converter is more deeply understood.(2) the impedance network matching mechanism of power electronic converter with input impedance matching, output impedance matching and load phase matching is proposed for the first time.Based on this mechanism, the system design method of impedance converter can be formed by designing the parameters of impedance network and matching the working performance of the converter to improve and change the output characteristics of the converter.It promotes the development of impedance converter.According to the design method of impedance matching converter, two novel 3-Z impedance network DC-DC boost converters are constructed. They make use of several series matching modes of the same Z impedance network to make the output impedance show negative impedance characteristics.Furthermore, the boost ratio of the converter is greatly improved, which can reach 350 times theoretically, which solves the problem that the low output voltage of the photovoltaic cell needs to be raised.In this paper, a novel Z-impedance half-bridge converter is constructed, in which the impedance network is embedded into the half-bridge converter, and the input impedance is increased, and the midpoint voltage of the input capacitance of the half-bridge converter is effectively stabilized.The demanding requirement of wide load range of electrochemical power supply is solved.A novel half bridge converter with double output Z impedance network is constructed. The design of this converter is based on the parallel matching of two impedance networks, which reduces the output impedance, reduces the switch element and capacitance by 1/4.The requirement of double load output is realized, and the cost of electric vehicle driving power is reduced effectively, and its power density is improved.The innovation of this paper lies in the deep analysis of the construction mechanism of the impedance converter represented by the Z-source converter from a new angle of view, and a general construction method of the impedance converter is proposed.It promotes the systematization of power electronic converter design and has obvious theoretical and practical application value.
【學位授予單位】：華南理工大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TM46

【參考文獻】

相關期刊論文 前3條

1 王英,張純江,陳輝明;三相PWM整流器新型相位幅值控制數(shù)學模型及其控制策略[J];中國電機工程學報;2003年11期

2 鄧衛(wèi)華,張波,丘東元,盧至鋒,胡宗波;三相電壓型PWM整流器狀態(tài)反饋精確線性化解耦控制研究[J];中國電機工程學報;2005年07期

3 錢照明，董伯藩，何湘寧;電力電子技術及其應用的最新發(fā)展(二)[J];中國電機工程學報;1998年03期

本文編號：1711685