Title :
Comparision of multi-carrier techniques in seven-level asymmetric cascade multilevel inverter
Author :
Colak, Ilhami ; Kabalci, Ersan ; Keven, Gokhan
Author_Institution :
Dept. of Electr. & Electron. Eng., Gazi Univ., Ankara, Turkey
Abstract :
The multilevel inverters (MLIs) are classified into three topologies such as Diode Clamped, Flying Capacitor and Cascade Multilevel Inverter (CMLI). CMLI topologies include two kind of structure that is named symmetric and asymmetric topologies. Asymmetric Cascade MLI (ACMLI) topologies consist of unequal DC sources. Many modulation techniques have been used in ACMLI topology such as Multi-Carrier PWM (MC-PWM), Space Vector PWM and Selective Harmonic PWM. The MC-PWM technique is achieved by four different types. In this study, MC-PWM techniques which are named Phase Disposition PWM, Phase Opposition Disposition PWM, Alternate Phase Opposition Disposition PWM and Phase Shifted PWM have been compared. It is uncovered that Phase Opposition Disposition PWM technique is more convenient in terms of Total Harmonic Distortion of output voltage and current signals and in terms of the quality of power factor in ACMLI which is performed in this study.
Keywords :
PWM invertors; capacitors; diodes; harmonic distortion; power factor; CMLI topologies; DC sources; MC-PWM technique; asymmetric cascade MLI topologies; asymmetric topologies; cascade multilevel inverter; diode; flying capacitor; modulation techniques; multicarrier PWM; multicarrier techniques; output current signals; output voltage signals; phase disposition PWM; phase opposition disposition PWM technique; phase shifted PWM; power factor quality; selective harmonic PWM; seven-level asymmetric cascade multilevel inverter; space vector PWM; symmetric topologies; total harmonic distortion; Frequency modulation; Harmonic analysis; Indexes; Inverters; Pulse width modulation; Topology; THD; asymmetric cascade multilevel inverter; frequency index; multi carrier PWM; power factor;
Conference_Titel :
Power Engineering, Energy and Electrical Drives (POWERENG), 2013 Fourth International Conference on
Conference_Location :
Istanbul
DOI :
10.1109/PowerEng.2013.6635859