本文關(guān)鍵詞：單相高頻鏈逆變器控制及并網(wǎng)技術(shù)研究　出處：《燕山大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 高頻鏈逆變器 解結(jié)耦 單極性移相 零電壓開關(guān) 二階廣義積分器

【摘要】：高頻鏈逆變器由變壓器原邊高頻逆變器、高頻變壓器、變壓器副邊周波變換器以及輸出濾波器組成,能夠克服傳統(tǒng)工頻逆變器體積大、噪聲大、成本高等缺點(diǎn),具有電路拓?fù)涑墒�、隔離型功率變換及能量雙向流動等優(yōu)點(diǎn),被廣泛研究。然而如何解決周波變換器的安全換流問題一直是該類逆變器的技術(shù)難點(diǎn)。針對此問題,本文提出一種解結(jié)耦單極性移相調(diào)制策略,能夠?qū)崿F(xiàn)周波變換器中所有功率管的零電壓開關(guān)(ZVS)以及變壓器漏感和濾波電感電流的自然換流,達(dá)到安全換流的目的。首先,本文對高頻鏈逆變器的拓?fù)漕愋瓦M(jìn)行了概述,介紹了高頻鏈逆變器的研究現(xiàn)狀,分析了幾種拓?fù)浯嬖诘膬?yōu)缺點(diǎn)。針對周波變換型單相高頻鏈逆變器拓?fù)湔归_分析,并對目前存在的幾種換流方法進(jìn)行了分析和總結(jié)。其次,本文總結(jié)了解結(jié)耦調(diào)制方法和單極性移相調(diào)制方法的優(yōu)點(diǎn),進(jìn)一步提出解結(jié)耦單極性移相調(diào)制策略,并且詳細(xì)分析了該策略實(shí)現(xiàn)軟換流的工作過程。同時,又進(jìn)一步研究了周波變換器中開關(guān)管兩端電壓尖峰和電壓震蕩的產(chǎn)生原因,通過理論證明了在變壓器原邊引入鉗位二極管及諧振電感抑制電壓震蕩的可行性,并重點(diǎn)分析了加箝位二極管及諧振電感的單相高頻鏈逆變器的工作過程。然后,本文對單相高頻鏈逆變器的閉環(huán)控制和并網(wǎng)控制進(jìn)行了研究,結(jié)合解結(jié)耦單極性移相調(diào)制方法建立了單相高頻鏈逆變器的數(shù)學(xué)模型。在此基礎(chǔ)上,研究了單相高頻鏈逆變器的雙閉環(huán)控制及并網(wǎng)控制技術(shù),介紹了基于二階廣義積分器的電網(wǎng)電壓同步技術(shù)及其設(shè)計方法,并討論了PR調(diào)節(jié)器和PI調(diào)節(jié)器的參數(shù)優(yōu)化方法。最后,在理論和仿真研究的基礎(chǔ)上,本文對整個系統(tǒng)的軟硬件進(jìn)行了詳細(xì)的設(shè)計,搭建了1k VA的實(shí)驗平臺,采用DSP與CPLD聯(lián)合的數(shù)字控制,通過實(shí)驗驗證了上述理論的正確性和可行性。
[Abstract]:The high frequency chain inverter is composed of transformer primary high frequency inverter, high frequency transformer, transformer auxiliary side cycle converter and output filter. It can overcome the disadvantages of traditional power frequency inverter such as large volume, large noise, high cost and so on. It has the advantages of mature circuit topology, isolated power conversion and bidirectional energy flow. However, how to solve the safe commutation problem of Zhou Bo converter has been the technical difficulty of this kind of inverter. In view of this problem, this paper proposes a decoupled unipolar phase shift modulation strategy. The ZVSs of all power transistors in Zhou Bo converter and the natural commutation of leakage inductance and filter inductance current of transformer can be realized to achieve the purpose of safe commutation. In this paper, the topology types of high frequency chain inverter are summarized, and the research status of high frequency chain inverter is introduced. The advantages and disadvantages of several topologies are analyzed. The topology of Zhou Bo transform single-phase high-frequency chain inverter is analyzed, and several commutation methods are analyzed and summarized. Secondly. In this paper, we summarize the advantages of decoupling modulation and unipolar phase shift modulation, and further propose a decoupling single-polarity phase-shift modulation strategy, and analyze the working process of soft commutation in detail. The causes of voltage spike and voltage oscillation at both ends of switch in Zhou Bo converter are further studied. The feasibility of introducing clamped diode and resonant inductor to the original edge of transformer to suppress voltage oscillation is proved by theory. The working process of single-phase high-frequency chain inverter with clamped diode and resonant inductor is analyzed. Then, the closed-loop control and grid-connected control of single-phase high-frequency chain inverter are studied in this paper. The mathematical model of single-phase high-frequency chain inverter is established by using decoupling unipolar phase-shift modulation method. Based on this, the double-closed-loop control and grid-connected control technology of single-phase high-frequency link inverter are studied. This paper introduces the voltage synchronization technology based on the second order generalized integrator and its design method, and discusses the parameter optimization methods of PR regulator and Pi regulator. Finally, on the basis of theoretical and simulation research. In this paper, the hardware and software of the whole system are designed in detail. A 1kVA experimental platform is built, and the digital control of DSP and CPLD is adopted. The correctness and feasibility of the above theory are verified by experiments.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM464

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本文編號：1412419