Call for Paper 25 June, 2024. Please submit your manuscript via online system or email at editor@ijew.io

ISSN E 2409-2770
ISSN P 2521-2419

Design of Hybrid Electromechanical Switch for Automatic Voltage Control of on Load Tap Changer Transformer


Uzair Khan and Dr. Abdul Basit


Vol. 10, Issue 03 PP. 22-29, March 2023

DOI

Keywords: Hybrid switch, On-load tap changer, Bi-directional switch, No-load switch, Auto-transformer

Download PDF


On Load tap changer OLTC transformer having electromechanical hybrid switch, is used to regulate voltage level by changing the taps without arcing which cause increase or decrease in voltage level in a very efficient and coherent manner depending upon the requirement of the system. Mostly mechanical type of On Load tap Changer is widely used for control voltage in distributed networks. Mechanical On Load Tap Changer has some disadvantages during tap changing process like causing arc, slow switching, high malfunction rate and require manpower. In mechanical switches wear and tear occurs due to tap changing due to the arcing phenomenon. Besides these drawbacks, there are also some advantages of mechanical OLTC such as low on-steady losses and high overload capacity. Due to fluctuations in voltage level of smart grid a hybrid power electronic assisted mechanical On Load Tap Changer transformer is designed. In this research paper a hybrid Switch is proposed using the advantages of mechanical as well as electronic bidirectional switches for automatic tap changing of OLTC transformer. The electronic OLTC uses semiconductor namely IGBT as a bidirectional switch. By using electromechanical switch the taps changing process will be arc less and there will be low On-state losses and high over load capacity. This will provide automatic, arc free tap change and long lifetime.


  1. Uzair Khan, uxairkhan25@gmail.com, Center for Advanced Studies in Energy (CAS-E), Department of Electrical Energy System, University of Engineering and Technology Peshawar, Pakistan.
  2. Abdul Basit, abdul.basit@uetpeshawar.edu.pk, Center for Advanced Studies in Energy (CAS-E), Department of Electrical Energy System, University of Engineering and Technology Peshawar, Pakistan.

Uzair Khan Dr. Abdul Basit Design of Hybrid Electromechanical Switch for Automatic Voltage Control of on Lo Vol. 10 Issue 03 PP. 22-28 March 2023. https://doi.org/10.34259/ijew.23.10032228.


[1]           J. Tu and Y. Mi, Research on Transformer Fast OLTC System, J. Phys. Conf. Ser., vol. 1187, p. 022002, Apr. 2019, doi: 10.1088/1742-6596/1187/2/022002.

[2]           H. Zhou, X. Yan, and G. Liu, A review on voltage control using on-load voltage transformer for the power grid, IOP Conf. Ser. Earth Environ. Sci., vol. 252, p. 032144, Jul. 2019, doi: 10.1088/1755-1315/252/3/032144.

[3]           J. Sanchez and M. Banovic, Basics of Power Transformers What are the basic transformation principles and essential transformer parts??, 2014.

[4]           N. Chen and L. Jonsson, A new Hybrid power electronics on-load tap changer for power transformer, vol. 2015, pp. 10301037, May 2015, doi: 10.1109/APEC.2015.7104475.

[5]           J. M. Canales, D. Serrano-Jimnez, M. Barrenetxea, J. A. Barrena, A. Goikoetxea, and J. Anzola, Electronic on Load Tap Changer Transformer for DC Electrical Railway Power Supply Systems. 2019, p. 4. doi: 10.1109/VPPC46532.2019.8952415.

[6]           G. R. Chandra Mouli, P. Bauer, T. Wijekoon, A. Panosyan, and E.-M. Baerthlein, Design of a Power Electronic Assisted OLTC for Grid Voltage Regulation, IEEE Trans. Power Deliv., vol. 30, pp. 11, Jan. 2014, doi: 10.1109/TPWRD.2014.2371539.

[7]           D. Das, D. Divan, and R. G. Harley, Power Flow Control in Networks Using Controllable Network Transformers, Power Electron. IEEE Trans. On, vol. 25, pp. 17531760, Aug. 2010, doi: 10.1109/TPEL.2010.2042076.

[8]           P. Mohite and C. Thorat, A review of zero-voltage switching and its importance to voltage regulation. 2017, p. 2906. doi: 10.1109/ICPCSI.2017.8392254.

[9]           S. Guan et al., Research on a new type of on-load automatic voltage regulation technology, 2017 IEEE 2nd Adv. Inf. Technol. Electron. Autom. Control Conf. IAEAC, pp. 25412544, 2017.

[10]         D. Rogers and T. Green, A hybrid diverter design for distribution level on-load tap changers. 2010, p. 1500. doi: 10.1109/ECCE.2010.5618245.

[11]         G. Ram, V. Prasanth, P. Bauer, and E.-M. Brthlein, Comparative analysis of on-load tap changing (OLTC) transformer topologies, in 2014 16th International Power Electronics and Motion Control Conference and Exposition, 2014, pp. 918923. doi: 10.1109/EPEPEMC.2014.6980624.

[12]         D. D. I. Dohnal, O.-Lo. Tap-Changers,  fOr pOwer TransfOrmers, M. K. Base, O.-Lo. Tap-Changers, and  fOr pOwer TransfOrmers, On-Load Tap-Changers for Power Transformers, 2006.

[13]         D. Gao, Q. Lu, and J. Luo, A new scheme for on-load tap-changer of transformers, Proc. Int. Conf. Power Syst. Technol., vol. 2, pp. 10161020 vol.2, 2002.

[14]         B. Poulin, R. M. D. Vecchio, P. T. Feghali, R. Ahuja, and D. M. Shah, Transformer Design Principles: With Applications to Core-Form Power Transformers, 2001.

[15]         S. Garca, J. Rodrguez, J. A. Jardini, J. Vaquero, A. Segura, and P. Cid, Feasibility of Electronic Tap-Changing Stabilizers for Medium Voltage LinesPrecedents and New Configurations, Power Deliv. IEEE Trans. On, vol. 24, pp. 14901503, Aug. 2009, doi: 10.1109/TPWRD.2009.2021032.

[16]         J. Vaquero, S. Garcia, J. Rodriguez, R. Vela Garcia, S. Fernandez, and C. Olay, Electronic Tap-Changing Stabilizers for Medium-Voltage Lines Optimum Balanced Circuit, Power Deliv. IEEE Trans. On, vol. 27, pp. 19091918, Oct. 2012, doi: 10.1109/TPWRD.2012.2198673.

[17]         S. Rao and B. Subramanyeswar, Fine Voltage Control Using Oltc by Static Tap Change Mechanism, 2012.

[18]         J. Faiz and B. Siahkolah, Electronic Tap-changer for Distribution Transformers, vol. 2. 2011. doi: 10.1007/978-3-642-19911-0.

[19]         G. H. Cooke and K. T. Williams, Thyristor assisted on-load tap changers for transformers. 1990, p. 131.

[20]         J. H. Harlow, Electric Power Transformer Engineering, Electr. Insul. Mag. IEEE, vol. 20, pp. 6464, Jun. 2004, doi: 10.1109/MEI.2004.1307095.

[21]         V. Bugade, Automatic Voltage Control of Load using on Load Tap Changer, Int. J. Res. Appl. Sci. Eng. Technol., vol. 6, pp. 31583162, Mar. 2018, doi: 10.22214/ijraset.2018.3681.