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TECHNICAL SCIENCES

MODELING AND ANALYSIS OF THE EFFECTS OF SYMMETRIC AND ASYMMETRIC LOADS ON 0.38 KV VOLTAGE ELECTRICAL NETWORKS

Khudayarov Muzaffar Khudayarov M. Abdukhalimov Jakhongir Abdukhalimov J. Sayimov Dilshod Sayimov D.

Abstract

The uneven distribution of loads across phases in low-voltage power supply networks significantly affects the quality of electricity, voltage regimes, and power losses. This article presents a comparative analysis of the influence of symmetrical and asymmetrical loads on the network operating mode in a 0.38 kV electrical network, modeled using the DigSILENT PowerFactory software environment. The obtained results showed that under symmetrical loading conditions, voltage deviations remained within permissible limits, and power losses were recorded at minimal levels (0.3-1.5%). In the asymmetric load mode, however, the phase voltage imbalance exceeded the allowable level, resulting in large currents in the neutral wire and active power losses reaching up to 6.29%. The research findings confirm that balancing loads across phases in low-voltage networks is a crucial factor in improving electricity quality and reducing losses.

Keywords

0.38 kV power distribution network symmetric and asymmetric loads voltage unbalance power losses power quality DigSILENT PowerFactory synchronous compensator.

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