Power Quality Improvement by Using Phase Shifting Transformer
Keywords:
Phase Shifting, Multipurpose Converters, Power Quality, Harmonic Mitigation, Line Current DistortionAbstract
Non-linear loads like direct current loads and induction motor drives are a major source of harmonics in the power system. Multipulse converters are widely used to overcome the problem of harmonics. This thesis highlights the performance comparison of different multipulse converters which are simulated in MATLAB/SIMULINK. Performance comparison of the 6-pulse, 12-pulse, 24-pulse and 48-pulse converters feeding RL-load is performed. The phase shift in the converters is achieved by using ziz-zag phase shifting transformers. The Total Harmonic Distortion (THD) in input current and input voltage along with ripple content in the output voltage and output current are measured and their corresponding waveforms are observed. Also, performance comparison of 6-pulse, 12-pulse, 24-pulse and 48-pulse converters is performed. The results obtained with a multipulse converter are compared with those obtained with the six pulse converter. It is observed that multipulse converters provide better results in terms of THD in input voltage and input current. It is found that as the pulse number of a converter increases, THD in input voltage and input current along with ripple content in the output voltage and output current is decreased.
Downloads
References
Bin Wu “High Power Converters and AC Drives” 2006 Ed. A John Wiley & Sons, Inc., Publication.
Muhammad H. Rashid, “Power electronics: Circuits, devices and applications” 3rd Ed. Oxford, UK: Elsevier Inc., 2011. [3] Jil McIntosh, “How it works: Electric vehicle charging”, driving .ca, Oct 27, 2017
Kotubdin, Andrew D Moore, Anup Barai, James Marco, “Effects of high frequency current ripple on vehicle battery performance”, Science Direct ,Applied Energy, vol. 178, Sep 15, 2016, pages 142-154.
Gang Zhao, Yunfie Yue, “Harmonic analysis and suppression of electrical vehicle charging station”, Proceedings of 2017IEEE International Conference on Mechatronics and Automation (ICMA), Aug 6-9, 2017, Takamatsu, Japan.
Wajahat Khan, Furkan Ahmad, Mohammad Saad Alam (AMU), “ Fast EV charging station integration with grid ensuring optimal and quality power exchange”, Science Direct, Aug 16, 2018.
D. A. Paice, “Transformers for Multipulse AC/DC Converters,” U.S. Patent 6 101 113, Aug. 8, 2000. [8] D. A. Paice, Power Electronic Converter Harmonics: Multipulse Methods for Clean Power. New York: IEEE Press, 1996.
S. Hansen, U. Borup, and F. Blaabjerg, “Quasi 12-pulse rectifier for adjustable speed drives,” in Proc. 2001 IEEE APEC1 Conf., vol. 2, Mar. 4–8, 2001, pp. 806–812.
Bhim Singh, Senior Member, IEEE, G. Bhuvaneswari, Senior Member, IEEE, Vipin Garg, Member, IEEE, and Sanjay Gairola, “Pulse Multiplication in AC–DC Converters for Harmonic Mitigation in Vector-Controlled Induction Motor Drives”, IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL. 21, NO. 2, JUNE 2006
