电网技术2026，Vol.50Issue(3)：中插108,1290-1299,中插109-中插110,13.DOI:10.13335/j.1000-3673.pst.2024.1219
混合模块化多电平换流器子模块预充电控制策略
Hybrid Modular Multilevel Converter Submodule Pre-charge Control Strategy
摘要
Abstract
A Hybrid modular multilevel converter(HMC)has the advantages of a smaller number of sub-modules,smaller converter size,and DC fault ride-through capability compared with the traditional modular multilevel converter,which is more advantageous in applications with space requirements.This paper proposes a hybrid modular multilevel converter submodule pre-charge control strategy for HMC under different operating conditions of active and passive power supply.Based on an in-depth analysis of the HMC working mechanism,six charging states of HMC under two working conditions are given,and an equivalent mathematical model of the charging circuit is established.Considering the inter-phase and intra-phase capacitor voltage balance and switching frequency limitation,a pre-charging method for switching combinations of different states of HMC is put forward,and a method for calculating the current-limiting resistor is also provided.Finally,the HMC-HVDC simulation model is constructed to validate the proposed pre-charging control strategy under the two operating conditions,proving that the proposed method can smoothly increase the capacitor voltage to the rated value under low switching frequency.关键词
混合模块化多电平换流器/预充电控制/子模块/高压直流输电Key words
hybrid modular multilevel converter/pre-charge control/sub-modules/high voltage DC transmission分类
信息技术与安全科学引用本文复制引用
黄龙,王顺亮,张芮,马俊鹏,涂皓,焦宁,刘天琪..混合模块化多电平换流器子模块预充电控制策略[J].电网技术,2026,50(3):中插108,1290-1299,中插109-中插110,13.基金项目
四川省自然科学基金项目(2023NSFSC0301).Project Supported by National Natural Science Foundation of Sichuan(2023NSFSC0301). （2023NSFSC0301）
