现代电力2025，Vol.42Issue(2)：377-384,8.DOI:10.19725/j.cnki.1007-2322.2023.0039
基于隔离型模块化多电平直流/直流变换器的总谐波畸变率优化调制控制策略
Optimal Modulation Control Strategy for Total Harmonic Distortion Rate Based on Isolated Modular Multilevel AC/DC Converter
摘要
Abstract
To solve the problem of increase of isolation trans-former losses led by a large number of high harmonics existing in the AC side voltage and current of quasi two-level modula-tion strategy in modular multilevel DC/DC converter(abbr.MMDC),firstly,the relationship between the switching angle of the power device and the total harmonic distortion(abbr.THD)of the primary side line voltage of the transformer was obtained by analysis.Secondly,a THD optimization modula-tion strategy with variable duty cycle and amplitude was pro-posed.The THD of the primary side line voltage and current of the transformer were reduced by changing the switch angle to reduce the transformer losses.Finally,the feasibility of the pro-posed THD-based the optimal modulation control strategy was verified by simulation software PSCAD/EMTDC.two-level modulation;total harmonic distortion;transformer harmonic losses;optimal switching angle.关键词
DC/DC变换器/模块化多电平/准两电平调制/总谐波畸变率/变压器谐波损耗/优化开关角Key words
DC/DC converter/modular multilevel/quasi two-level modulation/total harmonic distortion/transformer harmonic losses/optimal switching angle分类
动力与电气工程引用本文复制引用
孔祥平,宾子君,邓富金,孙振威,耿佳豪..基于隔离型模块化多电平直流/直流变换器的总谐波畸变率优化调制控制策略[J].现代电力,2025,42(2):377-384,8.基金项目
国网江苏省电力有限公司科技项目(J2021179).Project Supported by Science and Technology Project of State Grid Jiangsu Electric Power Co.,Ltd.(J2021179). （J2021179）
