双级矩阵变换器混合式换流  

Hybrid commutation strategy for two-stage matrix converter

作　　者：宋卫章[1,2] 邢飞雄 贺瑾[1] 钟彦儒[1] 汪春华[3] 汪丽娟[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049 [3]西安航空学院电气学院,陕西西安710077

出　　处：《电机与控制学报》2014年第11期65-71,共7页Electric Machines and Control

基　　金：国家自然科学基金(51307138);教育部博士学科点专项科研基金(新教师类)(20126118120009);电力设备电气绝缘国家重点实验室开放基金(EIPE14207);陕西省自然科学基础研究计划项目(2014JQ7247);陕西省重点学科建设专项资金资助项目(105-5X1201);陕西省教育厅专项科研计划项目(12JK0562);西安理工大学博士启动基金(105-211104)

摘　　要：针对双级矩阵变换器(TSMC)整流级窄脉冲处四步换流失效和宽脉冲处零电流换流较难追踪覆盖的不足,提出一种混合式换流方案,将脉冲分为宽窄脉冲,宽脉冲下采用四步换流策略,窄脉冲处采用零电流协调换流,零电流换流协调会导致逆变级载波为动态不规则波形,较难实现,提供了一种依据整流级开关占空比调整逆变级信号波的简易实现方法,分析了原理,给出了示意图。搭建了一台样机对上述方案进行了实验验证,结果表明该方案的采用在确保系统具有优良网侧和传动性能的同时,实现了安全可靠换流,从而有效消除了由上述问题导致的过电流/过电压尖峰,提高了系统可靠性,为TSMC进一步工程应用奠定了基础。Aiming at the shortages of two-stage matrix converter（ TSMC）,which are more difficult to achieve in narrow-pulse by four-step commutation and wide-pulse for zero current commutation strategy because of combination of rectifier and inverter strictly. A hybrid commutation strategy was proposed. All pulse were divided into wide and narrow pulse,four-step commutation strategy was used for wide-pulse,and zero current commutation was employed in narrow-pulse. An achievement method for zero current commutation was proposed to solve difficult achievement,which adjust inverter modulation signal according to duty ratio of rectifier stage. Finally A experimental prototype was built,and the experimental results indicate that TSMC not only owns the excellent input and output-performance,but also reduces overcurrent/over-voltage caused by before factors,thus the system reliability is improved.

关 键 词：双级矩阵变换器 混合换流 四步换流 零电流换流 窄脉冲 

分 类 号：TM46[电气工程—电器]