Comparative analysis of THD for symmetrical and asymmetrical 17 level cascaded H-bridge inverter using carrier based PWM techniques

Author

Thakre, Kishor ; Mohanty, Kanungo Barada

Author_Institution

Dept. of Electr. Eng., Nat. Inst. of Technol., Rourkela, India

fYear

2015

fDate

28-30 May 2015

Firstpage

306

Lastpage

310

Abstract

In this paper various multicarrier PWM schemes are simulated, to reduce the THD and enhance the output voltage waveforms for seventeen level inverter. Here, three modulation techniques are compared: constant switching frequency (CSF), Phase shift (PS PWM) and variable switching frequency (VSF). These schemes are applied for analysis of both symmetrical and asymmetrical structure of cascaded H-bridge 17-level inverter. Simulation for 17- level cascaded H-bridge inverter (CMLI) has been carried out in MATLAB/ Simulink and simulation results for voltage waveform and harmonic spectrum are presented in this paper and analyzed.

Keywords

PWM invertors; bridge circuits; harmonic distortion; power conversion harmonics; CSF modulation technique; THD; asymmetrical H-bridge inverter; carrier based PWM techniques; cascaded H-bridge inverter; constant switching frequency modulation technique; multilevel H-bridge inverter; output voltage waveforms; phase shift PWM; total harmonic distortion; variable switching frequency modulation technique; Frequency modulation; Harmonic analysis; Inverters; Pulse width modulation; Switches; Switching frequency; Asymmetrical CMLI; Constant Switching Frequency; Phase Shift PWM and Variable Switching Frequency PWM; Symmetrical CMLI; Total Harmonic Distortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Instrumentation and Control (ICIC), 2015 International Conference on

Conference_Location

Pune

Type

conf

DOI

10.1109/IIC.2015.7150758

Filename

7150758