UNIV. NEWS. NORTH-CAUCAS. REG. TECHNICAL SCIENCES SERIES. 2016; 2: 53-61
http://dx.doi.org/10.17213/0321-2653-2016-2-53-61
ADVANTAGES AND LACKS MODERNIZATION OF STREET LIGHT AT INSTALLATION OF LIGHT-EMITTING DIODE LIGHTINGS, AND AS THEIR INFLUENCE ON LOSSES OF ACTIVE POWER IN TRANSFORMERS OF DISTRIBUTIVE NETWORKS
Troitsky Anatoly Ivanovich – Doctor of Technical Sciences, professor, department «Electro Supply and the Electric Drive», Platov South-Russian State Polytechnic University (NPI), Novocherkassk, Russia. Ph. (8635) 25-56-50.
Kostinsky Sergey Sergeevich – Candidate of Technical Sciences, assistant professor, department «Electro Supply and the Electric Drive», Platov South-Russian State Polytechnic University (NPI), Novocherkassk, Russia. Ph. (8635) 25-56-50. E-mail: mirovingen1987@mail.ru
Vlasenko Vyacheslav Ivanovich – director of the municipal unitary enterprise «Maikop city electric networks» of municipal union «City of Maikop», Maikop. Ph. (8772) 23-22-27.
Khimishev Timur Zaurovich – post-graduate student, department «Electro supply and the Electric Drive», Platov South-Russian State Polytechnic University (NPI), Novocherkassk, Russia.
Abstract
The provisions. In article the review about modernization street light is resulted. Advantages and lacks of light-emitting diode lighting are specified. The special attention is given influence of the light-emitting diode lighting established at them modernization, on losses in transformers of distributive networks. The functional dependences are resulted, allowing to calculate size of additional losses of active power in transformers of distributive networks from asymmetrical and not sinusoidal loading. As initial data for calculation of losses about resistance of loading data are necessary for each phase. Active and inductive resistance of windings the higher voltage and the lowest voltage, and also a magnetizing circuit of the transformer are considered known for the transformer of the set power. Use of resistance as initial data for calculation is caused by that there is no necessity for use of corners of shift between a current and voltage in each of the connected three-phase circuit. The measured values of a current of n-th harmonic are necessary for calculation of losses from not sinusoidal loading as, therefore, along with quality assurance of voltage in accordance with GOST 32144-2013, there is a necessity in a complex to supervise indicators of quality of currents. For each transformer of a distributive network it is necessary count and estimate separately influence of asymmetry and not sinusoidal loadings of electro consumers, and on the basis of the spent calculations give recommendations about decrease in losses in it.
Keywords: asymmetry; indemnification of reactive power; the light-emitting diode lighting; modernization; street light; upper harmonics; transformers of distributive networks; active power losses.
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