Analysis of voltage unbalance and power losses in low-voltage power networks

Muzaffar B. Xudayarov, Jahongir A. Abduxalimov

Энергия ва ресурс тежаш муаммолари · 2026-yil

Annotatsiya

Relevance: in recent years, as a result of the widespread introduction of renewable energy sources in electric power systems, the increase in the number of consumers, and the uneven distribution of electrical loads, voltage asymmetry and power losses in low-voltage electrical networks have increased significantly. In particular, in radial distribution networks with a voltage of 0.4 kV, an uneven distribution of currents by phases is observed as a result of the random connection of single-phase consumers. This situation leads to an increase in current in the neutral wire, additional heat losses in transformers and cable lines, and a deterioration in the quality indicators of electricity. In addition, the integration of solar power plants (QES) into low-voltage networks directly affects the quality parameters of electricity. If QES systems are not connected to the network at optimal points, in some cases, overvoltage, reverse power flow, or interphase asymmetry may occur. Therefore, the technical efficiency of QES connection in low-voltage power grids is one of the urgent scientific and practical issues. In this study, a mathematical model of a radial low-voltage power grid was developed based on the DigSILENT PowerFactory software package, and the voltage asymmetry, power losses, and load distribution in the grid were analyzed. The network parameters after connecting the solar power plant to the phase of the tire with low voltage were also comparatively evaluated. Aim: voltage deviations caused by Phase charge symmetries in low voltage power grids, keeping the symmetry coefficient at the permissible limit, as well as analyzing power wastes in the DigSILENT Power Factory program, as well as justifying the possibility of improving electricity quality indicators by optimally connecting a solar power plant. Methods: during the study, computational and modeling methods were used in the DigSILENT PowerFactory program to study the operating modes of a 0.4 kV low-voltage power grid. A radial model of the network was constructed and Line parameters, consumer loadings, and phase-wise current distributions were modeled. The voltage symmetry was evaluated through the k2u coefficient. Results: the calculation results showed that the total active power losses in the network in the initial state were 6300.474 W, while after connecting the QES, this value decreased to 3316.01 W. At the same time, the coefficient of voltage symmetry in tire 16 decreased from 6.01% to 2.17%. Phase strain deviations have also improved significantly.

Maqola ma’lumotlari
MualliflarMuzaffar B. Xudayarov, Jahongir A. Abduxalimov
JurnalЭнергия ва ресурс тежаш муаммолари
Nashriyot«Ўзбекэнерго» АО, ТДТУ, Ўзбекистон Республикаси ФА, Энергия ва ресурслар тежаш илмий-амалий ўқув маркази, «Ўздавэнергоназорат» давлат инспекцияси, «Энергия тежамкорлиги ва қайта тикланувчи энергия манбалари» илмий-тадқиқот лабораторияси
ISSN2091-5985, 2181-1946
Nashr sanasi2026-10-13
Son3
Betlar59-67
TilIngliz
Ilmiy sohaTexnika
Indeksga qo‘shilgan2026-10-22

Maqolaning asl sahifasi

Kalit so‘zlar

низковольтная электросеть, low-voltage power grid, past kuchlanishli elektr tarmog‘i

Ilmiy soha

Texnika

Iqtibos keltirish

APAMuzaffar B. Xudayarov, & Jahongir A. Abduxalimov (2026). Analysis of voltage unbalance and power losses in low-voltage power networks. Энергия ва ресурс тежаш муаммолари, (3), 59-67. https://energy.tdtu.uz/index.php/journal/article/view/411
GOST (OAK)Muzaffar B. Xudayarov, Jahongir A. Abduxalimov Analysis of voltage unbalance and power losses in low-voltage power networks // Энергия ва ресурс тежаш муаммолари. – 2026. – № 3. – P. 59-67.
MLAMuzaffar B. Xudayarov, and Jahongir A. Abduxalimov. “Analysis of voltage unbalance and power losses in low-voltage power networks.” Энергия ва ресурс тежаш муаммолари, (3), 59-67, 2026. https://energy.tdtu.uz/index.php/journal/article/view/411
ChicagoMuzaffar B. Xudayarov, and Jahongir A. Abduxalimov. “Analysis of voltage unbalance and power losses in low-voltage power networks.” Энергия ва ресурс тежаш муаммолари, (3), 59-67 (2026). https://energy.tdtu.uz/index.php/journal/article/view/411
HarvardMuzaffar B. Xudayarov, and Jahongir A. Abduxalimov (2026) ‘Analysis of voltage unbalance and power losses in low-voltage power networks’, Энергия ва ресурс тежаш муаммолари, (3), 59-67. https://energy.tdtu.uz/index.php/journal/article/view/411
BibTeX
@article{muzaffarbxudayarov2026,
  title = {Analysis of voltage unbalance and power losses in low-voltage power networks},
  author = {Muzaffar B. Xudayarov and Jahongir A. Abduxalimov},
  journal = {Энергия ва ресурс тежаш муаммолари},
  year = {2026},
  number = {3},
  pages = {59-67},
  url = {https://energy.tdtu.uz/index.php/journal/article/view/411}
}

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