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Analysis of Loading and Phase Current Imbalance in Distribution Transformers at ULP Haurgeulis
Abstract
The ever-increasing demand for electrical energy necessitates that power distribution systems operate optimally in terms of both reliability and efficiency. Within these systems, distribution transformers play a crucial role in delivering electricity to customers. However, in actual field conditions, inter-phase load imbalances are frequently encountered, which can negatively impact transformer performance and the quality of electricity delivery. This issue prompted a study to analyze transformer loading levels and phase current imbalances during daytime load conditions in the service area of PT PLN (Persero) ULP Haurgeulis. The research involved direct observation, field measurements, and the processing of current and voltage data from five distribution substations. The parameters analyzed included phase currents, neutral current, transformer loading percentage, load imbalance, and power losses. The analysis revealed that the highest loading level occurred at the HRKC substation (52.64%), while the highest load imbalance was observed at the HRKI substation (65.12%). The HRKE substation exhibited the highest neutral current (49 A) and the greatest power losses (1,642.39 W). These results indicate significant load imbalances across several distribution substations; consequently, measures to balance inter-phase loads and implement periodic monitoring are required to enhance the efficiency and reliability of the power distribution system.
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DOI: https://doi.org/10.21107/triac.v13i2.34290
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