【摘要】：針對目前模塊化多電平DC-DC變換器拓?fù)浣Y(jié)構(gòu)及其主要采用的交流平衡控制方法所帶來的問題,基于直流控制思想,提出了一種新型模塊化多電平DC-DC變換器拓?fù)�。通過重構(gòu)一種全橋子模塊結(jié)構(gòu),每個子模塊電容同時包含兩條充放電路徑,相鄰子模塊間通過形成局部的并聯(lián)支路實現(xiàn)電容間電能傳遞和電容電壓自平衡,避免了子模塊電容在單向直流電能變換導(dǎo)致的電壓失衡。通過對變換器的平衡機理及其基本工作原理分析、仿真實驗驗證,結(jié)果表明所提出的變換器在直流控制方式下能夠穩(wěn)定運行,子模塊電容電壓具有自平衡能力,變換器電壓變比范圍大,具有適用于不同應(yīng)用場合直流輸配電的應(yīng)用潛力。
[Abstract]:Aiming at the problems caused by the topology structure of modular multilevel DC-DC converter and its main AC balance control methods, a novel modular multilevel DC-DC converter topology is proposed based on DC control idea. By reconstructing a full-bridge sub-module structure, each sub-module capacitor contains two charge-discharge paths at the same time, and the adjacent sub-modules realize the power transfer and capacitance voltage self-balance between capacitors by forming a local parallel branch. The voltage imbalance caused by unidirectional DC power conversion of sub-module capacitors is avoided. Through the analysis of the balance mechanism and the basic working principle of the converter, the simulation results show that the proposed converter can operate stably under the DC control mode, and the capacitor voltage of the sub-module has the ability of self-balancing. The converter has the potential for DC transmission and distribution in different applications because of its wide range of voltage variation.
【作者單位】： 艦船綜合電力技術(shù)國防科技重點實驗室(海軍工程大學(xué));
【基金】：國家自然科學(xué)基金資助項目(51490681) 國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)資助項目(2015CB251004)~~
【分類號】：TM46

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