Title :
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
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;
Conference_Titel :
Industrial Instrumentation and Control (ICIC), 2015 International Conference on
Conference_Location :
Pune
DOI :
10.1109/IIC.2015.7150758
