三电平四桥臂SVG三电流滞环控制方法研究  

Three Current Hysteresis Control Strategy of Four-leg Three-level SVG

作　　者：鄢志平[1] 何英杰[1] 李毅[1] 刘进军[1] 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049

出　　处：《中国电机工程学报》2016年第20期5575-5583,5734,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50907052);陕西省自然科学基金项目(2014JQ7271);输配电装备及系统安全与新技术国家重点实验室访问学者项目资助(2007DA10512714405)~~

摘　　要：该文针对用于三相四线制电网的四桥臂中点箝位拓扑结构静止无功发生器,提出一种三电流滞环控制方法。该方法利用电流滞环来判断参考电压矢量所在的区域,而无需利用逆变器输出侧电感参数计算参考电压,故对输出侧电感参数没有依赖性,并将误差电流与滞环环宽比较后选择最优的开关状态。另一方面该方法可使某相开关状态在30?范围内不动作,降低了开关频率,减少了开关损耗。还利用空间矢量的冗余状态来均衡直流侧电压,不需要添加任何硬件电路。实验结果证明,该方法具有动静、态特性好,鲁棒性强,开关频率低,补偿效果优等优点。According to the topology of three-phase four-leg SVGthis paper presented a new control way of three level three current hysteresis basing on NPC. Which takes advantages of the third current hysteresis to judge the area of the reference voltage vector, and there is no need to use the inductance parameter L to calculate the reference voltage, therefore, in this way, there is no dependency on L, and the best switch state is selected after comparing the error current and the width of hysteresis. This paper also researches a kind of control way that takes full advantages of the space vector redundant state to balance the DC voltage, which doesn＇t need any control hardware. Experiments proved the way has good dynamic and static characteristics.

关 键 词：三相四桥臂 三电平 三电流滞环 均压控制 

分 类 号：TM46[电气工程—电器]