本文選題：雙向變換器 + 高增益比　； 參考：《南京航空航天大學》2016年碩士論文

【摘要】：雙向直流變換器是實現(xiàn)能量雙向傳輸?shù)闹匾b置,在分布式儲能系統(tǒng)中應用較為廣泛,用于實現(xiàn)蓄電池和高壓母線之間能量的高效雙向傳輸。由于蓄電池端電壓一般較低且變化范圍較寬,高壓母線電壓通常又較高,這就要求雙向直流變換器具備高電壓增益變換、寬電壓范圍調(diào)節(jié)的能力,給研究高效傳輸?shù)碾p向變換器帶來了巨大的挑戰(zhàn)。本文首先研究可以實現(xiàn)高電壓增益變換、寬電壓范圍調(diào)節(jié)的雙向變換器拓撲,通過結(jié)合非隔離型雙向Buck/Boost變換器的寬電壓調(diào)節(jié)能力和隔離型半橋式雙向直流變換器的高增益變換能力,得到本文研究的非隔離型高增益比雙向直流變換器拓撲。文中首先研究該變換器拓撲在移相控制下的工作原理和特性,針對軟開關范圍窄、電流紋波大等缺點進一步優(yōu)化控制策略引入占空比調(diào)節(jié),文中詳細分析了該變換器在PWM加移相控制下的工作原理和特性,并搭建了1kW雙向變換器樣機進行了充分的實驗驗證,理論分析和實驗表明:該變換器在PWM加移相控制下不僅能夠?qū)崿F(xiàn)全范圍軟開關,而且繞組電流有效值和開關管電流應力都得到了大幅降低。本文進一步引入電感-變壓器的復用-集成概念,將前文變換器拓撲中的能量傳輸電感和變壓器進行磁集成,得到本文研究的耦合電感式高增益比雙向直流變換器拓撲。該變換器同樣采用PWM加移相控制,在提高功率密度的同時依然可以實現(xiàn)高效的能量雙向傳輸,文中詳細分析了變換器的工作原理、特性并對關鍵參數(shù)設計進行了詳細分析,最后搭建了40V-60V/400V 1kW實驗樣機進行驗證,實驗結(jié)果證明了理論分析的正確性。
[Abstract]:Bi-directional DC / DC converter is an important device to realize bidirectional energy transmission. It is widely used in distributed energy storage system. It is used to realize high efficiency bidirectional energy transmission between battery and high-voltage bus. Because the voltage of battery terminal is generally lower and the range of variation is wider, the voltage of high voltage bus is usually higher, which requires the ability of high voltage gain conversion and wide voltage range adjustment of bidirectional DC / DC converter. It brings great challenges to the research of high efficiency bidirectional converters. In this paper, we first study the bidirectional converter topology which can realize high voltage gain conversion and wide voltage range adjustment. By combining the wide voltage regulation ability of the non-isolated bidirectional Buck/Boost converter and the high gain conversion ability of the isolated half-bridge bidirectional DC / DC converter, the topology of the non-isolated high gain ratio bi-directional DC / DC converter studied in this paper is obtained. In this paper, the working principle and characteristics of the converter topology under phase-shift control are studied firstly, and the duty cycle adjustment is introduced to optimize the control strategy in view of the disadvantages of narrow soft switching range and large current ripple. The principle and characteristics of the converter under the PWM phase-shift control are analyzed in detail, and the prototype of the 1kW bi-directional converter is built for full experimental verification. Theoretical analysis and experiments show that the converter can not only achieve a full range of soft switching under PWM phase-shift control, but also greatly reduce the effective value of winding current and the current stress of the switch tube. In this paper, the concept of multiplexe-integration of inductance transformer is further introduced, and the energy transfer inductor and transformer in the former converter topology are integrated into each other, and the coupling inductance high gain ratio bi-directional DC / DC converter topology studied in this paper is obtained. The converter also adopts PWM phase-shift control, which can achieve high efficiency bidirectional energy transmission while increasing power density. In this paper, the principle and characteristics of the converter are analyzed in detail, and the design of key parameters is analyzed in detail. Finally, the 40V-60V/400V 1kW experimental prototype is built to verify the correctness of the theoretical analysis.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TM46

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本文編號：1965783