交直交轧机主传动系统两重化三电平网侧变流器控制策略  

Dual Three-level-grid-converter Control Strategy of AC-DC-AC Main Drive System for Rolling Mill

作　　者：陈涛 张志学 CHEN Tao;ZHANG Zhixue(CRRC Zhuzhou Institute Co.,Ltd.,Zhuzhou,Hunan 412001,China)

机构地区：[1]中车株洲电力机车研究所有限公司

出　　处：《控制与信息技术》2019年第6期29-35,共7页CONTROL AND INFORMATION TECHNOLOGY

基　　金：国家科技支撑计划(2012BAF09B02)

摘　　要：中压传动三电平变流器被广泛应用于工业传动领域,在某些超大功率场合,其需要多重化应用,而网侧谐波指标一直是网侧变流器重点优化的目标。文章分析了一次侧串联绕组变压器的谐波最优实现原理,提出了一种基于单电流闭环的两重化网侧变流器谐波优化控制策略及变压器直流偏磁综合补偿方法,最终在两重化中点箝位型三电平IGCT变流器机组上进行了对比试验验证。试验结果表明,采用该控制方式显著降低了网侧电流谐波含量和幅值。Medium voltage three-level converters are widely used in the field of industrial drive systems.In some super-power occasions,it is very important to reduce the harmonics at grid side by using multiple rectifying applications.In this paper,the principle of harmonic optimal realization of a series winding transformer on the primary side was analyzed,and a harmonic optimal control strategy of dual-grid-converter based on single current closed-loop and a comprehensive compensation method for DC bias of transformer were proposed.The experimental results show that the proposed control strategy can reduce the converter input current harmonics significantly.

关 键 词：串联绕组变压器 轧机主传动系统 IGCT变流器 谐波最优调制策略 

分 类 号：U264.37[机械工程—车辆工程]