Scientific and Technical Journal

ELECTROTECHNIC AND COMPUTER SYSTEMS

ISSN Print 2221-3937
ISSN Online 2221-3805
EFFICIENCY OF TWO-WIRE ELECTRIC CABLES IN VIEW OF MUTUAL INFLUENCE BETWEEN ITS WIRING
Abstract:
Now wave processes in lines with the distributed parameters are considered well studied. Particularly it is known that the maximum value of efficiency of the line without loss reaches in so-called mode of approved loading when loading resistance is equal to wave resistance of the line. However, all two-wire and three-wire cables of communication represent system of lines with distributed parameters in which separate conductors are connected with each other by magnetic and galvanic communications. In such cables dependence of coefficient of useful action from loading resistance remains not researched. In this article, on the basis of mathematical model formed by authors, it is comprehensively investigated that influence of active and reactive components of loading resistance on efficiency of the cable having two conductors with general screen. It is shown that with communications the efficiency is influenced by both components of loading resistance. The maximum value of efficiency is reached in case of net active loading, however its increase is also possible in case of reactive   resistance. At the same time it is shown that the efficiency is influenced only by balance between own wave resistance and loading resistance of connected lines system. The secondary wave resistance caused by an interconnection doesn't influence on efficiency. It is found that connected lines system has smaller sensitivity for changing of loading resistance in comparison with the line without communications. This fact shows that practical application of the connected lines transmission of electrical energy allows providing high values of efficiency in wide spectrum of changing of loading resistance.
Authors:
Keywords
DOI
References

1. Wong, K. (2014) “Prioritization of underground transmission cable renewal projects in power electric utility companies” In: IEEE 27th Canadian Conference on Electrical and Computer Engineering. Toronto, pp. 1–5.

2. Zuochun, Z., Yanyan, Z., Huachun L. (2012), “Fault reason analysis of 10kV cable lines of city power grid with OWTS state detection” In: China International Conference on Electricity Distribution (CICED), Shanghai, pp. 1–8

3. Ibbotson, L. (1999) “The Fundamentals of Signal Transmission Inline, waveguide, fiber and free Space”, Burlington: Elsevier, 150 p.

4. Maevsky, D. A., Semenuyg, A. N., Kucherenko, G. N. (2015) Influence of the coupling between the cables conductors on the operation mode of electric networks [“Vliyanie vzaimnyih svyazey mezhdu provodnikami kabelya na rezhim rabotyi elektricheskih setey”] Electrotechnic and computer systems, № 19 (95), pp. 142–145.

5. Maevsky, D. A., Semenuyg, A. N., Maevskaya E. J., Kucherenko, G. N. (2015) “Mathematical modeling of electromagnetic processes in shielded cables” [“Matematicheskoe modelirovanie elektromagnitnyih protsessov v ekranirovannyih kabelyah”] In: Mathematical and imitational modeling of systems (MODS), Chernihiv,pp. 183–187.

6. Sobral, S. T., Peixoto, C. A. O., Amon, J., Rezende, F. D. S., Menezes, A. A. (2010) “Transmission lines using aluminium cable steel reinforced ground wires nearby power substations” In: 2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA), San Paulo, p.p. 57–64,

7. Rimsky, V. K., Berzan, V .P., Tyrshu, M. S. (1997) “Wave phenomena in inhomogeneous lines. Volume 1. The theory of wave propagation potential and current” [“Volnovyie yavleniya v neodnorodnyih liniyah. Tom 1. Teoriya rasprostraneniya voln potentsiala i toka”], Chisinau: Academy of Sciences of the Republic of Moldova.

8. Berzan, V. P., Rimsky, V. K., Patsuk, V. I., Tyrshu, M. S. (2014) Reactive power in the long electrical lines [“Reaktivnaya moschnost v dlinnyih elektricheskih liniyah”] In: Problemele Energeticii Regionale, No. 3(26) , pp. 1–14.

9. Bessonov, L. A. (2007) “Theoretical Foundations of Electrical Engineering. Electrical circuits: a textbook” [“Teoreticheskie osnovyi elektrotehniki. Elektricheskie tsepi: uchebnik”]. 11-th ed,, Moscow: Gardariki.

Published:
Last download:
2017-11-21 22:53:03

[ © KarelWintersky ] [ All articles ] [ All authors ]
[ © Odessa National Polytechnic University, 2014. Any use of information from the site is possible only under the condition that the source link! ]
Яндекс.Метрика