电气传动2025，Vol.55Issue(7)：28-35,8.DOI:10.19457/j.1001-2095.dqcd26084
基于自适应动态保持因子的MMC降损耗策略
MMC Loss Reduction Strategy Based on Adaptive Dynamic Retention Factor
摘要
Abstract
Aiming at the problem of large switching loss of modular multilevel converter(MMC),starting from the switching frequency optimization strategy,the existing switching frequency optimization strategy was improved,and the accurate analytical formula of sub-module capacitor voltage based on the real-time value of MMC transmission power was derived,so as to calculate the fluctuation range of the mean value of capacitor voltage.The dynamic retention factor was obtained by using the margin between the mean value of capacitor voltage and the engineering constraint,and the final output switching instruction was realized by the main flow of the equalization strategy.The PSCAD/EMTDC model was built based on the offshore wind power flexible engineering parameters to verify and compare the proposed strategy with the traditional strategy.The simulation results show that under the premise of meeting the requirements of the project on the fluctuation range and the imbalance index,the switching frequency of the proposed strategy is reduced by 49%～58%compared with the traditional strategy under each steady-state condition,and the switching loss is reduced by 63%～90%under each steady-state condition,and the expected loss reduction effect is achieved.关键词
模块化多电平换流器/阀损耗/开关频率/电压均衡/开关损耗Key words
modular multilevel converter(MMC)/valve power loss/switching frequency/voltage balancing/switching losses分类
信息技术与安全科学引用本文复制引用
杨朝晖,魏华栋,何柳青,张浩,彭国平,史奔..基于自适应动态保持因子的MMC降损耗策略[J].电气传动,2025,55(7):28-35,8.基金项目
广东省重点领域研发计划项目(2034612100001) （2034612100001）
