三电平逆变器双极性调制方式研究  

Research of Three-level Inverter Modulate Approach based on Double-Polarity

作　　者：王坤[1] 欧阳红林[1] 曹青[1] 陈乔明 

机构地区：[1]湖南大学,湖南长沙410082 [2]天津天铁冶金集团炼钢厂,天津300170

出　　处：《电力电子技术》2008年第7期4-6,共3页Power Electronics

摘　　要：SVPWM控制的三电平逆变器具有减少谐波含量、改善输出电压波形的优点,正在逐步取代传统的两电平逆变器。介绍了三电平逆变器原理和空间矢量算法在其中的应用,提出一种改进算法的三电平空间矢量PWM调制策略和中点电位控制方法。基于TMS320C2812DSP实现了逆变系统的数字控制,利用FPGA和PLC实现脉冲触发和接口控制。仿真和实验结果论证了该算法的正确性。Three-level inverter controlled by the algorithm of space vector pulse width modulation （SVPWM） has replaced the traditional two-level converter for its excellent performance of lowering switch frequency and reducing the total AC current aberrance.The principle of three-level inverter and space vector arithmetic appliance in it are introduced.The experimental results verify the advanced SVPWM principle and neutral point control （NPC） used in the inverter and the numeric control of inverter system based on TMS320C2812 is realized.FPGA and PLC implement the impluse triggering and interface control.The effectiveness of proposed control algorith-mic was verified by simulation and experimental.

关 键 词：逆变器 脉宽调制/双极性调制 数字信号处理 

分 类 号：TM464[电气工程—电器]