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A Novel Square-wave Pulse Rotation Modulation Strategy for Modular Multilevel Converters 被引量:9

A Novel Square-wave Pulse Rotation Modulation Strategy for Modular Multilevel Converters
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摘要 悬浮直流电容电压的均衡问题是模块组合多电平变换器(modular multilevel converter,MMC)的关键问题之一。提出一种可实现MMC直流电容电压平衡的方波脉冲循环调制(square-wave pulse rotation modulation,SWPRM)策略,在保证合成的阶梯波输出波形不变的前提下,根据MMC的拓扑结构和工作原理,对传统方波脉冲列进行脉冲优化,并按照一定的次序和切换周期进行循环和判断反相调整,获得的循环方波脉冲列作为最终驱动脉冲用于实现对MMC的控制。实验结果表明,采用提出的方波脉冲循环调制策略无需任何电容电压控制措施,在较低开关频率下,实现了MMC各功率单元间有功能量的平均分配和直流电容电压的均衡。 The floating dc capacitor voltage balancing control is one of the key issues for modular multilevel converters (MMC). By analyzing the topology and working principles of the MMC, a novel square-wave pulse rotation modulation (SWPRM) strategy is proposed for balancing the dc capacitor voltage, as shown in Fig. 1.
出处 《中国电机工程学报》 EI CSCD 北大核心 2013年第9期I0006-I0006,共1页 Proceedings of the CSEE
基金 中央高校基本科研业务费重点专项(2010JBZ009) 北京京仪椿树整流器有限责任公司的资助本文的研究工作得到了北京京仪椿树整流器有限责任公司的资助,在此表示衷心的感谢.
关键词 调制策略 方波脉冲 多电平变流器 模块化 旋转 直流电容器 多电平变换器 平衡控制 modular multilevel converter (MMC) square-wave pulse modulation pulse rotation leg attribution judgment conducting time voltage balancing
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