电气传动2024，Vol.54Issue(1)：53-60,8.DOI:10.19457/j.1001-2095.dqcd24308
集成直流故障换流电路的改进型混合MMC
Improved Hybrid MMC Integrated with DC Fault Commutated Circuit
摘要
Abstract
Based on full-bridge(FB)and half-bridge(HB)sub-modules(SMs),the conventional hybrid modular multievel converter(MMC)is a typical topology of MMC with DC fault clearing ability.However,the proportion of FB SMs in conventional hybrid MMC is usually greater than 50%,so as to increase the cost and losses.To solve this mentioned issue,a DC fault commutated circuit based on thyristor-switched capacitor(TSC)structure in the hybrid MMC was integrated to reduce the number of FBs,the improved TSC-hybrid MMC was proposed in follows.In TSC-hybrid MMC,HB-MMCs and FB-MMCs were both retained their complete commutated body,and meanwhile,they were connected by a three-winding transformer in AC side and in series with DC side.In particularly,a thyristor-switched capacitor structure was integrated in the DC side of TSC-hybrid MMC to clear the DC fault.According to the analysis,the proportion of FB SMs in TSC-hybrid MMC can be reduced to 10%～25%or even lower(the AC-side voltage quality is a main limiting condition),the cost is reduced as well as the on-state losses.Simulation results validate the correctness of analyses.关键词
晶闸管开关电容/直流故障换流电路/混合型MMC/直流故障清除策略/串联型换流器Key words
thyristor-switched capacitor(TSC)/DC fault commutated circuit/hybrid modular multilevel converter(MMC)/DC fault clearing strategy/series converter分类
信息技术与安全科学引用本文复制引用
梁桢,王勇,白海滨,张志宇,孙谦浩,崔彬..集成直流故障换流电路的改进型混合MMC[J].电气传动,2024,54(1):53-60,8.基金项目
中国博士后科学基金(2022M711762) （2022M711762）
国家自然科学基金(52007097) （52007097）
