Abstract

The aim of the study is to analyze the effect of DC link fluctuations on the output voltage of the inverter. Voltage Source Inverters (VSI) plays a dominant role in the industrial world. Most of the industries use rectifiers to convert single phase AC supply to DC supply. DC supply is fed to the Voltage Source Inverter (VSI) through a DC link capacitor. The capacitor decides the quality of output fed to the Voltage Source Inverter. Six pulses are given to the Voltage Source Inverter by means of MCBRCPWM (Multiple Carrier Based Random Carrier Pulse Width Modulation) technique. The output of Voltage Source Inverter is fed to a three phase squirrel cage induction motor. The investigation of MCBRCPWM with different capacitor values provided in the DC link has been effectively discussed. The results of harmonic spectra and Total Harmonic Distortion (THD) are given in the paper. Simulation results prove that as the value of capacitor increases, the evaluation parameters such as Total Harmonic distortion, Fundamental Voltage and Harmonic Spread Factor (HSF) are improved.

Keywords:

DC link, harmonic spread factor, random pulse, width modulation, voltage source inverters,

References

1. Dur’an-G’omez, J.L., P.N. Enjeti and B.O. Woo, 2015. Effect of voltage sags on a ripple rejection inherited RPWM for VSI working with fluctuating DC link voltage. J. Electr. Eng. Technol., 10(5): 2018-2030.
   CrossRef    
2. Enjeti, P. and W. Shireen, 1990. An advanced programmed PWM modulator for inverters which simultaneously eliminates harmonics and rejects dc link voltage ripple. Proceeding of the 5th Annual Applied Power Electronics Conference and Exposition (APEC '90). Los Angeles, CA, USA, pp: 681-685.
   CrossRef    
3. Gou, B., X. Feng, W. Song, K. Han and X. Ge, 2012. Analysis and compensation of beat phenomenon for railway traction drive system fed with fluctuating DC-link voltage. Proceeding of the 7th International Power Electronics and Motion Control Conference (IPEMC, 2012). Harbin, China, June 2-5, 1: 654-659.
   
4. Habetler, T.G. and D.M. Divan, 1991. Acoustic noise reduction in sinusoidal PWM drives using a randomly modulated carrier. IEEE T. Power Electr., 6(3): 356-363.
   CrossRef    
5. Jung, H.S., S.J. Chee, S.K. Sul, Y.J. Park, H.S. Park and W.K. Kim, 2014. Control of three-phase inverter for AC motor drive with small DC-link capacitor fed by single-phase AC source. IEEE T. Ind. Appl., 50(2): 1074-10781.
   CrossRef    
6. Kim, S.H., W.J. Choi, S.W. Choi and K.B. Lee, 2009. Combined dithered sigma-delta modulation based random PWM switching scheme. J. Power Electron., 9(5): 667-678.
   
7. Klima, J., M. Chomat and L. Schreier, 2008. Analytical closed-form investigation of PWM inverter induction motor drive performance under DC bus voltage pulsation. IET Electr. Power App., 2(6): 341-352.
   CrossRef    
8. Maruthupandi, P., N. Devarajan, K. Sebasthirani and J.K. Jose, 2013. Optimum control of total harmonic distortion in field programmable gate array-based cascaded multilevel inverter. J. Vib. Control, Doi: 10.1177/1077546313504223.
   CrossRef    
9. Ouyang, H., K. Zhang, P. Zhang, Y. Kang and J. Xiong, 2011. Repetitive compensation of fluctuating DC link voltage for railway traction drives. IEEE T. Power Electr., 26(8): 2160-2171.
   CrossRef    
10. Sivarani, T.S., S. Joseph Jawhar and C. Agees Kumar, 2016. Intensive random carrier pulse width modulation for induction motor drives based on hopping between discrete carrier frequencies. IET Power Electron., 9(3): 417-426.
    CrossRef    

Competing interests

The authors have no competing interests.

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