摘要
针对高压直流电网中不同电压等级的变换需求,设计了基于谐振式模块化多电平变换器(MMC)的直流变压器。分析了谐振式MMC直流变压器的工作原理和性能。研究了在不同的调制策略下,谐振式MMC直流变压器的各种运行模式,以及对应实现的电压变比。为了对谐振式MMC直流变压器进行全面的研究,提出了一种新型的调制方法,其具有灵活的变比和固有的平衡能力。搭建了谐振式MMC直流变压器原理样机测试平台,并开展了试验研究。研究结果验证了理论分析和调制策略的有效性。
A direct current(DC)transformer based on resonant modular multilevel converter(MMC)was designed for different voltage levels in high voltage DC grids.The working principle and performance of the resonant MMC DC transformer were analyzed.The various operating modes of the resonant MMC DC transformer under different modulation strategies and the corresponding voltage ratios were studied.In order to conduct a comprehensive study on the resonant MMC DC transformer,a new modulation method was proposed,which has flexible ratio and inherent balance.A prototype test platform for resonant MMC DC transformers was built and experimental research was carried out.The results verify the validity of theoretical analysis and modulation strategies.
作者
郭贝贝
齐山成
赵斌
GUO Beibei;QI Shancheng;ZHAO Bin(School of Electrical Engineering and Automation,Henan Institute of Technology,Xinxiang 453003,Henan,China)
出处
《电气传动》
2021年第3期55-61,共7页
Electric Drive
基金
2017年河南省高等学校青年骨干教师培养计划(2017GGJS170)。
关键词
模块化多电平变换器
直流变压器
调制策略
变比
modular multilevel converter(MMC)
direct current transformer
modulation strategy
ratio
