摘要
针对传统的共模电压抑制方法都无法从算法上彻底消除共模电压的问题,提出一种新的算法。通过三电平变流器的有效开关状态,对共模电压进行分析,并得出中矢量调制共模电压为零的结论。通过对两电平调制出的PWM脉冲波进行分配和调整,产生一组对三电平变流器有效的中矢量开关状态。采用中矢量调制从算法上消除共模电压,并通过Matlab仿真和实验验证了结论的正确性和可用性。
For the method of tradictional to reduce common-mode voltage can＇t eliminate completely, a new arithmetic is advanced.With effective on-off states in three-level converter,common-mode voltage is analyzed, and the conclusion that common-mode voltage is zero when modulated with middle vector is got.The effective on-off states of middle vector to three-level converter can be made by adjusting the PWM modulated in two-level converter.The study uses middle vector to modulate to eliminate common voltage completely, and the validity and usability of it can be validated by Matlab and experiment.
出处
《电力电子技术》
CSCD
北大核心
2012年第10期77-79,共3页
Power Electronics
关键词
变流器
中矢量
三电平
共模电压
converter
middle vector
three-level
common-mode voltage
