Thursday 28th of March 2024
 

Analysis and design of multiple feedback control loops for both Inverter and Rectifier of single-phase UPS under Non-linear Load


Seyed Reza Hadian Amrei, Seyed Morteza Alizadeh, Amin.Yaghoubi and Ali. Bemani

In this article, a controlling method is proposed for single-phase Uninterruptible Power Supplies. The proposed method is capable of reducing the distortion in the output voltage and also changing the output voltage into a desirable sine wave when UPS supplying non-linear and variable loads. In this method, two controlling loops are used, based on output voltage feedback (outer loop) and self current feedback (inner loop). Using the results of simulation in MATLAB/SIMULIN software, the result of the proposed method is compared to the result of the controlling method based on output voltage feedback only. The proposed controlling method (multiple feedbacks) leads to a better regulation and better responding of UPS to different types of loads, as compared to the controlling methods using simple feedback. In addition, the proposed method improves the input power factor, using the appropriate controlling strategy in the rectifier part of the UPS in which a rectifier with a BOOST convertor is used as the circuit correcting the power factor.

Keywords: controlling method, single-phase, MATLAB/SIMULIN, UPS

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ABOUT THE AUTHORS

Seyed Reza Hadian Amrei
was born in Sari, Mazandaran province, Iran on August 16, 1966. He received B.E. (Electronics) degree in 1989 from Tehran University, Tehran, Iran and M. Sc. (Biomedical Engineer) degree in 2000 from Amir Kabir University, Tehran, Iran. From 1990 to 2002 he worked as Expert and Research worker in Electronics department, National Iranian Research Center, Tehran, Iran. He received the Ph.D. degree in Electrical Engineering in 2006 at Harbin Institute of Technology, Harbin, China. He is member of various professional societies of IEEE.. His research areas include Harmonics and Interharmonics in grid-connected VSI, Passive and active filtering for grid-connected converters, Power electronic converters, Sliding mode and non-linear control strategies. His works have been published in international journals and conference including IEEE. Dr seyed reza hadian amrei is one of the faculty members of laser and optics research school N.S.T.R.I Tehran . Iran

Seyed Morteza Alizadeh
Seyed Morteza Alizadeh was born in Rasht, Iran, in 1985. He received the B.Sc. degree in electronic engineering from Islamic Azad University, Lahidjan branch, Lahidjan, Iran, in 2008 and the M.Sc. degree in power engineering from Islamic Azad University, Saveh branch, Saveh, Iran, in 2010. He has several papers in the field of electronic drives and artificial intelligence controller. His principle research interests are: Modeling and simulation, electronic drives, hybrid systems, magnetic machines and artificial intelligence. Mr. Alizadeh is with the Faculty of Islamic Azad University, Saveh Branch and he is one of the members of Engineering Organization, Gilan, Iran .

Amin.Yaghoubi
Amin.Yaghoubi received the B.Sc. degree from the University of Shahrood ,semnan, Iran, in 2009 and the M.Sc. degree from the Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran, Iran, in 2012, both of them in power system. His main research interests include power converters, modulation techniques, control and modeling of FACTS controllers, Digital signal processor for implementation controllers.

Ali. Bemani
Ali. Bemani received the B.Sc. degree from the University of Tafresh a branch of Amir Kabir University, Tafresh, Iran, in 2009 and the M.Sc. degree from the Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran, Iran, in 2011, respectively in electronic and power electronics . His main research interests include power converters, modulation techniques, control and modeling of FACTS controllers, Digital signal processor for implementation controllers.


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