期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2015
卷号：77
期号：2
出版社：Journal of Theoretical and Applied
摘要：A multilevel inverter is a preferred choice for most medium-voltage and high-power applications, as well as cascaded H-bridge (CHB) two-level inverters due to its advantages such as low cost, light weight and compact size. Space vector modulation is widely used in real-time digital control for power inverter and better DC utilization. It is suitable particularly for use in a cascaded H-bridge multilevel inverter due to reduced total harmonic distortion (THD). This paper discusses harmonic reduction of a three-phase (CHB) multilevel inverter. Harmonic content in multilevel inverters can be investigated by generating a space vector pulse width modulation algorithm (SVPWM) signal based on a standard two-level SVPWM. It uses a simple mapping to generate gating signals for the inverter. The proposed modulation was compared for two-, three- and five-level cascaded inverters to reduce high total harmonic distortion, high switching losses and reduce cost based on the cascaded H-bridge two-level consists of one lookup table 6 switching one DC source, three-level consists of two lookup table 12 switching two DC sources and five-level consists of four lookup table 24 switching four DC source inverters. The algorithm can be easily extended to an N-Level inverter. It is an application to cascade H-bridge topology as well. The proposed scheme has been designed using MATLAB/Simulink and it only consists of four switching cells (CHB) and four DC voltage supplies for five-level with R-L load that can be used to any level.
关键词：Multilevel Inverter; Cascaded H-Bridge (CHB); SVPWM; Total Harmonic Distortion (THD) DC Sources.
