宁夏电力Issue(1)：1-7,22,8.DOI:10.3969/j.issn.1672-3643.2025.01.001
单相MMC高压直流变压器拓扑及控制策略
Topology and control strategy for single-phase MMC high-voltage DC transformers
摘要
Abstract
This paper presents the architecture of a high-voltage DC transformer that uses a single-phase modular mul-tilevel converter(MMC)to reduce significant energy losses in high-voltage AC transmission and address the issue of wide-frequency oscillations in flexible DC transmission.This design effectively supports the integration and distribution of renewable energy technologies.Both the high-voltage and medium-voltage sides use a single-phase MMC configura-tion,with a 400 Hz medium-frequency transformer for electrical isolation.A vector control technique using virtual dq components is employed to enable decoupling control between the high-voltage and medium-voltage sides in the view of single current-voltage characteristic of the single-phase MMC.A suppression method using a resonant controller is deve-loped to reduce double-frequency circulating currents in the single-phase MMC.Finally,simulations of steady-state opera-tion and circulating current suppression are conducted,and the results confirm the effectiveness of the proposed topology and control strategy.关键词
单相模块化多电平换流器/直流变压器/环流抑制Key words
single-phase modular multilevel converter/DC transformer/circulating current suppression分类
信息技术与安全科学引用本文复制引用
焦鑫艳,朱海勇,殷子寒,卞亦飞,裘鹏,张雪垠..单相MMC高压直流变压器拓扑及控制策略[J].宁夏电力,2025,(1):1-7,22,8.基金项目
国家重点研发计划项目(2023YFB2405900) （2023YFB2405900）
