基于小波检测的混合级联多电平动态电压恢复器研究

为应对高电压、大容量动态电压恢复器（DVR）的要求,解决功率器件开关频率和电力电子变流装置容量的矛盾,介绍了基于小波变换的奇异性检测算法,能准确检测电压扰动发生的时刻,达成电压补偿的实时性,改善DVR动态性能,并搭建了硬件电路。仿真验证了多电平结构和基于小波变换的检测算法应用于DVR的可行性。

Research of Hybrid Cascaded Multilevel Dynamic Voltage Restorer Based on Waveler Monitoring

Dynamic voltage restorer （DVR） is a kind of power quality control equipment for voltage disturbance of system level. As the high voltage-level and heavy-duty DVRs are required, the multilevel technology is applied to reduce contradiction of switch frequency with converter device capacity. A new detection method based on wavelet transform was presented to detect the exact moment of voltage disturbance happened. The experimental and emulational results indicate that the multilevel DVR is feasible.