一种改进控制方法在三电平逆变器中的应用  

Application of One Improved Control Method in the Three-level Inverter

作　　者：谭玉东[1] 欧阳红林[1] 李小华[1] 蔡昱华[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电气传动》2009年第10期38-41,共4页Electric Drive

基　　金：湖南省科学技术厅科技计划(06CK3005)

摘　　要：随着三电平逆变器电平数增多,空间矢量调制算法应用变得复杂,另外也存在直流侧电容电压平衡问题。介绍了一种基于最近三角形矢量(NTV)合成法则的快速SVM算法,可较快得到合成参考矢量的最近3个空间矢量及各自作用的时间。另外对矢量的输出顺序也做了分析,并针对输入电容电压平衡要求对软件算法进行了改进。最后运用Matlab仿真工具对系统进行了仿真,建立了基于TMS320F2812实现的变频调速系统。仿真和实验验证了算法的正确性和有效性。With the level increase of diode clamp-style three-level inverter, the application of SVPWM algorithm becomes complicated, in addition there are also questions with DC capacitor voltage＇s balance. The fast SVM algorithm based on NTV was introduced,which can obtain the nearest 3 space vectors and each＇s effect time that compose reference vector. In addition,the output of vector sequence were also analyzed,and improved the software algorithms for the balance of capacitance voltage requirements. Finally actualized simulation of the system using Matlab simulation tool,established frequency control system based on TMS320F2812. Emulation and experiment validate the correctness and validity of the arithmetic.

关 键 词：三电平逆变器 快速空间矢量 电容电压平衡 数字信号处理器 

分 类 号：TM464[电气工程—电器]