Preview

Safety and Reliability of Power Industry

Advanced search
Open Access Open Access  Restricted Access Subscription Access

Study of power transformer loading in rural power supply systems

https://doi.org/10.24223/1999-5555-2020-13-4-282-289

Abstract

The purpose of this study is to study the effect of loading power transformers (PT) in their continuous use on their energy efficiency on a real-life example of existing rural electric networks. It is noted that the vast majority of PT in rural areas have a very low load factor, which leads to an increase in specific losses of electric energy when this is transmitted to various consumers. It is planned to optimize the existing synchronized power supply systems in rural areas by creating new power supply projects in such a way as to integrate existing power sources and ensure the most efficient loading of power transformers for the subsequent transfer of these systems to isolated ones that receive power from distributed generation facilities. As an example, we use data from an electric grid company on loading power transformers in one of the districts of the Irkutsk region. Issues related to the determination of electric energy losses in rural PT at different numerical values of their load factors are considered. A computing device was developed using modern programming tools in the MATLAB system, which has been used to calculate and plot the dependence of power losses in transformers of various capacities on the actual and recommended load factors, as well as the dependence of specific losses during the transit of 1 kVA of power through a power transformer at the actual, recommended and optimal load factors. The analysis of specific losses of electric energy at the actual, recommended and optimal load factors of PT is made. Based on the analysis, the intervals of optimal load factors for different rated power of PT of rural distribution electric networks are proposed. It is noted that to increase the energy efficiency of PT, it is necessary to reduce idling losses by increasing the load of these transformers, which can be achieved by reducing the number of transformers while changing the configuration of 0.38 kV distribution networks.

About the Authors

I. V. Naumov
Irkutsk national research technical University; Irkutsk state agrarian University named after A. A. Yezhevsky
Russian Federation

83 Lermontov str., 664074, Irkutsk;

village Youth 1/1, 664038, Irkutsk



D. N. Karamov
Irkutsk national research technical University; Melentiev Energy Systems Institute of SB RAS
Russian Federation

83 Lermontov str., 664074, Irkutsk;

130 Lermontov str., 664058, Irkutsk



A. N. Tretyakov
Irkutsk state agrarian University named after A. A. Yezhevsky
Russian Federation
village Youth 1/1, 664038, Irkutsk


M. A. Yakupova
Irkutsk state agrarian University named after A. A. Yezhevsky
Russian Federation
village Youth 1/1, 664038, Irkutsk


E. S. Fedorinovа
Irkutsk state agrarian University named after A. A. Yezhevsky
Russian Federation
village Youth 1/1, 664038, Irkutsk


References

1. Power Transformers – Introduction to measurement of losses. Document published: August 2016 Lead author of this document: Angelo Baggini (ECD) Project coordinator: WIP. Horizon 2020 programme Project acronym: INTAS Project full name: Industrial and tertiary product Testing and Application of Standard / (https://www.intas testing.eu/storage/app/media/INTAS_transformers_descr.pdf).

2. Naumov I. V., Gantulga D., Shevchenko M. V. Investigation of operation modes of electric networks of low observability in Mongolia / Vestnik Irgsha 2016; 73: 140 – 147. (in Russ).

3. Vinogradov A. V., Vinogradova A. V., Bolshev V. E., Ward M. O., Makhiyanova N. V., Dolomaniuk L. V. Justification for creating a mobile complex to assess electric energy loss in power transformers during the operation process / E3S Web of Conferences 124, 02009 (2019) https://doi.org/10.1051/e3sconf/201912402009

4. Zeynep Kaya, Nazım İmal. On power transformers energy efficiency based load transfer analysis / International Journal of Energy Applications and Technologies, December 2018 // doi: 10.31593/ijeat.442589

5. Khomenko I. V., Berezka S. K., Poliakov I. V. Analysis of optimum operating modes of power transformers under operating conditions / Electrical Engineering and Electromechanics.2016.no 6 pp. 70 – 73// doi:10.20998-2074-272X.2016.6.12.

6. Baidak Yu., Matukhno V., Chaikovskiy V. Energe efficient transformers with various load graphics for the consumers of electric power / Refrigeration Engineering and Technology 52(2), June 2016// doi: 10.21691/ret.v52i2.59.

7. Рower distribution Transformers 6 – 10 kV with a capacity of 63 – 2500 kVA. Requirements for the level of no-load and short-circuit losses / Joint-stock company "Russian networks". One HUNDRED 34.01- 3.2-011-2017 (date of introduction 12.04.2017) (in Russ).

8. Alyunov A. N., Vyatkina O. S., Akhmetova I. G., Pentiuc R. D., Sakipov K. E. Issues on optimization of operating modes of power transformers / E3S Web of Conferences 124, 02015 (2019).

9. By Edvard. Losses in the power transmission system and short, medium and long line model analysis / Home / Technical Articles / Transformers / Transmission and Distribution / https://electricalengineering-portal.com/losses-power-transmission-system, February, 21st 2018.

10. Gracheva E. I., Naumov O. V., Fedotov E. A. Influence of load capacity of power transformers on their operational characteristics / Kazan state power engineering University, Kazan // Energy issues 2017; 19 (7 – 8): 71 – 77 (in Russ).

11. Ivakin V. N., Kovalev V. D., Magnitsky A. A. energy efficiency Regulation of distribution transformers // Unified grid energy 2017; 5 (34): 20 – 31(in Russ).

12. Kotov G. N. Losses in a power transformer and how to reduce them [Text] / G. Kotov // Radioamator 2016; 2: 14 – 17 (in Russ).


Review

For citations:


Naumov I.V., Karamov D.N., Tretyakov A.N., Yakupova M.A., Fedorinovа E.S. Study of power transformer loading in rural power supply systems. Safety and Reliability of Power Industry. 2020;13(4):282-289. (In Russ.) https://doi.org/10.24223/1999-5555-2020-13-4-282-289

Views: 602


ISSN 1999-5555 (Print)
ISSN 2542-2057 (Online)