Authors : Mehmet Yılmaz

Volume/Issue : Volume 10 - 2025, Issue 3 - March

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DOI : https://doi.org/10.38124/ijisrt/25mar1591

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Abstract : The continuous current carrying capacity is related to continuous loading. Bare conductors in overhead power lines (OHL) are under atmospheric conditions. In this respect, the air temperature, wind speed, and solar potential of the region can play a role in increasing or decreasing the current carrying capacity. Due to the heat balance, similar to Kirchhoff's current law, the heat gained and lost by the conductor are equal. If a multi-circuit power line is on the same tower, the current carrying capacities are equal since the phases of each circuit are exposed to the same meteorological parameters. If the circuits of a multi-circuit power line are on separate towers and pass through different routes, in this case, each circuit will be affected by different meteorological parameters and the current carrying capacities will not be equal. In this article, the degree of asymmetry in the steady state current carrying capacity of each circuit in multi-circuit power lines passing through different routes is examined. Depending on the length and geographical features of the route, meteorological parameters in each line segment were taken into account instead of the average meteorological parameters along the line.

Keywords : Ampacity, IEC Standard 738, IEEE 61597, Multi-Conductor Line, Heat Balance.

References :

1. IEEE Standard 738 (2023)-Standard for Calculating the Current-Temperature Relationship of Bare Overhead Conductors. 
2. IEC 61597 (1995)-Technical Report Type 3-Overhead electrical conductors: Calculation methods for stranded bare conductors.
3. CIGRÈ Brochure (2006)-Guide for Selection of Weather Parameters for Bare Overhead Conductor Rating, Technical Brochure 299.
4. CIGRÈ (2014)-Guide for Thermal Rating Calculation of Overhead Lines, Technical Brochure 601.
5. ESAA (The Electricity Supply Association of Australia) (1988)-Current Rating of Bare Overhead Line Conductors, D(lb) 5.
6. Schmidt, N.P., Comparison between IEEE and CIGRE Ampacity Standards”, IEEE Transactions on Power Delivery, 14, 1555-1562, 1990.
7. Staszewski, L. and Rebizant, W. “The differences between IEEE and CIGRE heat balance concepts for line ampacity considerations”, Modern Electric Powerr Systems (MEPS), Proceedings of the International Symposium, 2010, 1-4.
8. Bangay, J., Coleman, M., Batten, R., “Comparison of IEEE and CIGRE methods for predicting thermal behaviour of power lines and their relevance to distribution networks”, 2015 IEEE Eindhoven Power Tech, 1-5.
9. Arroyo, A., Castro, P., Martinez, R., Manana, M., Madrazo, A., Lucuna, R., Gonzalez, A., “A comprarison between IEEE and CIGRE thermal behaviour standards and measured temperature on a 132 kV overhead power line”, Energies, 8, 13660-13671, 2015.
10. Zenczak, M., “Approximate Relationships for calculation of current-carrying capacity of overhead power transmission lines in different weather conditions”, Proceedings of the Progress in Applied Electrical Engineering (PAEE), 25-30 June 2017, Poland.
11. Spes, M., Bena, L., Kosterec, M. Marton, M., “Determining the current capacity of transmission lines based on ambient conditions”, Journal of Energy Technology (JET), 10, 61-69, 2017.
12. Pavlinic, A. and Komen, V., “Calculation and anaysis of the steady-state line ampacity weather sensitivity coefficients”, Electric Power Systems Research, 181, 106181, 2020.
13. Ghadiyali, A.A., Zinzuvadia, M.J., Choski, P.G., Grewal, G.S., “Prediction of temperature of overhead conductors using CIGRE thermodynamic model and its validation”, International Journal of Advance Engineering and Research Development, 5, 2367-2379, 2018.
14. Coffey, J., “High temperature overhead conductor considerations”, Transmission and Substation Design and Operations Symposium, September 5-8 2018, USA.”,
15. Power EKanalik, M., Margitova, A., Urbanski, J., Bena, L., “Temperature calculation of overhead power line conductors according to CIGRE Technical Brochure 207”, 20^th International Scientific Conference on Electrical Engineering (EPE), 15-17 May 2019, Czech Republic.
16. Abboud, A.W., Gentle, J.P., Parikh, K., Coffey, J., “Sensitivity Effects of High Temperature Overhead Conductors to Line Rating Variables”, Idaho National Laboratory (INL)”, INL/CON-19-56930-Revision-0, 2020.
17. Gentle, J., Myers, K.S., Baldwin, T., West, I., Hart, K., Savage, B., Ellis, M., Anderson, P., “Concurrent wind cooling in power transmission lines”, 2012 Western Energy Policy Research Conference, 30-31 August 2012, USA.
18. Rahman, S.A. and Kopsidas, K., “Impact of simplified convection model in overhead lines thermal rating calculation methods”, 2018 IEEE/PES Transmission and Distribution Conference and Exposition (T&D), 16-19 April 2018, USA.
19. Riba, J.R, Liu, Y., Eguilaz, M.M., “Analyzing thee role of emisivity in stranded conductors for overhead power lines”, International Journal of Electrical Power and Energy Systems, 159, 11027, 2024.
20. Deb, A.K., “Powerline Ampacity System: Theory, Modeling and Application”, CRC Press, 2000.
21. Gomez, F.A., de Maria, J.M.G., Puertas, D.G., Bairi, A., Arrabe, R.G., “Numerical study of the thermal behaviour of bare overhead conductors in electric power lines”, Proceedings of the 10th WSEAS International Conference on Communications, Electrical-Computer Engineering, March 24-26 2011, Canary Islands, Spain.
22. Sterc, T., Grcic, B.F., Franc, B., Mesic, K., “Methods for estimation of OHL conductor temperature based on ANN and regression analysis”, International Journal of Electrical Power and Energy Systems, 151, 109192, 2023.
23. Malska, W., “Analysis of current ampacity of the 110 kV overhead transmission line using a multiple regression model”, Electric Power Systems Research, 236, 110939, 2024.
24. Farzaneh, M., Farokhi, S. and Chisholm, W.A., “Electrical Design of Overhead Power Transmission Lines”, McGraw-Hill, 2012.
25. Gonen, T., “Electrical Power Transmission Engineering: Analysis and Design”, 3^rd Edition, CRC Press, 2014.
26. TNSP Operational Line Ratings, Australian Energy Regulator (AER), 2007.
27. Solano, J.C., Montano, T., Correa, J.M., Ordonez, A., Pesantez, M., “Correlation between the wind speed and the elevation to evaluate the wind potential on the Southern Ecuador”, 6^th International Conference on Advances on Clean Energy Research  (ICACER), April 15-17 2021, Spain.