Improving power quality in cascade multilevel converters based on single-phase non-regenerative power cells

Baier, Carlos R.; Muñoz, Javier; Melín, Pedro; Guzmán, Johan; Morán, L.

doi:10.1109/iecon.2011.6119774

Cited by 7 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A 9 level grid connected inverter topology photovoltaic structure operated without including single phase transformer is discussed in [12][13][14]. CHBMLI using single phase non regenerative power units has been implemented to improve the quality of output voltage/power in [15]. The large frequency-link cascaded multilevel inverter is operated with the average voltage for direct grid integration of RES (Renewable Energy Sources) in [16].…”

Section: Introductionmentioning

confidence: 99%

Experimental verification of trinary DC source cascaded H-bridge multilevel inverter using unipolar pulse width modulation

Irusapparajan¹,

Periyaazhagar

Prabaharan

et al. 2019

Automatika

View full text Add to dashboard Cite

Multilevel inverters (MLIs) are an imperative solution for high power and high voltage applications. The MLIs can be classified into two categories such as symmetric and asymmetric. The asymmetric type MLIs has large number of output voltage steps with less number of input DC voltage sources and switching devices. In this paper, a single phase asymmetric (trinary sequence DC source) Cascaded H-Bridge MLI has been developed using unipolar PWM control schemes. The topology can produce 27-level output voltage with the help of 12 switches and 3 DC sources. It has been examined with a diverse combination of multicarrier unipolar PWM control. The PWM control includes Phase Disposition (PDPWM), Alternative Opposition Disposition (APODPWM), Carrier overlapping (COPWM), and Variable Frequency (VFPWM). The harmonic content of output voltage for each technique has been observed with different modulation indices. The demonstration of proposed topology for generating 27-level output voltage has been tested through simulation in MATLAB-SIMULINK and verified with laboratory-based experimental setup. From the results, it is evident that the APODPWM offers quality output voltage with relatively low harmonic distortion. Also, it has been observed that COPWM performance is superior since it delivers relatively higher fundamental RMS output voltage.

show abstract