摘要
多电平均压型直流变换器(MVBDC)在中高压直流变换领域具有良好的应用前景,然而随着电平数的提高,MVBDC中谐振单元数目增加,易引起较大的输入电流纹波,进而影响变换器效率和器件寿命。该文以常见的耦合型和解耦型MVBDC为例,在分析MVBDC输入电流纹波与各级谐振电流之间关系基础上,提出一种输入电流纹波抑制策略。通过调整各谐振电流之间的相位,可有效降低MVBDC输入电流纹波、提高变换器效率。最后,通过搭建仿真模型和实验平台验证了上述理论分析的正确性和有效性。
Multilevel voltage-balancing DC-DC converter(MVBDC)shows good application prospect in medium and high voltage DC conversion field.However,with the increase of output levels,the resonant current may introduce large input current ripple,which affects the converter efficiency and device life.This paper takes coupling and decoupling MVBDC as examples to analyze the relationship between MVBDC input current ripple and resonance currents at various levels,and the input current ripple suppression strategy is proposed.By controlling the phases of the resonant currents,zero ripple of the MVBDC input current can be achieved,which improves the converter efficiency.Finally,the correctness of the above theory is verified by experimental results.
作者
倪梦涵
杨晓峰
王淼
李世翔
郑琼林
Ni Menghan;Yang Xiaofeng;Wang Miao;Li Shixiang;Trillion QZheng(School of Electrical Engineering Beijing Jiaotong University Beijing,100044,China)
出处
《电工技术学报》
EI
CSCD
北大核心
2021年第16期3354-3364,共11页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51737001)
中央高校基本科研业务费(2019JBM058)资助项目
关键词
多电平均压型直流变换器
中高压直流变换
电流纹波
效率
谐振
Multilevel voltage-balancing DC-DC converter(MVBDC)
medium and high voltage DC conversion
current ripple
efficiency
resonance
