单相逆变器小波占空比跟踪调制策略  

Research on Single-Phase Inverter Wavelet Modulation Technique Based on the Tracking of Duty Ratio

作　　者：宁振 吴雷 

机构地区：[1]江南大学轻工过程先进控制教育部重点实验室,江苏无锡214122

出　　处：《江南大学学报（自然科学版）》2015年第4期419-423,共5页Joural of Jiangnan University (Natural Science Edition)　

基　　金：江苏省产学研创新项目(BY2012069)

摘　　要：为进一步改善逆变器输出谐波的频谱分布,降低较难被滤除的低次谐波含量,提出一种基于占空比跟踪的单相逆变器小波调制(WM)技术。分析了WM采样与重构实现过程,通过改造Haar小波函数实现单相WM逆变器输出电压占空比的跟踪。仿真表明,这种WM控制输出电压占空比与调制信号同步变化,显著降低了低次谐波含量,改善了逆变器输出谐波频谱分布,总谐波畸变率降低,有助于减少谐波对电网的干扰。In order to improve the frequency spectrum of the inverter output harmonic and to reduce the low harmonic content,a novel wavelet modulation( WM) technique based on the tracking duty ratio is proposed for single-phase inverter. On the basis of the WM sampling and reconstruction's analysis,WM realizes the tracking duty ratio of output voltage via reforming Haar wavelet function. The simulation result shows that by keeping the duty ratio of the output voltage and modulation signal simultaneously,WM can decrease the low harmonic,improve the frequency spectrum,reduce the total harmonic distortion,which is useful for reducing the harmonic disturbance to power grid.

关 键 词：逆变器 占空比 小波调制 

分 类 号：TM464[电气工程—电器]