Analysis of Load Imbalance in Tarakan Distribution Transformer of PT PLN (Persero) Sukarami Customer Service Unit

Abdul Azis, Muhammad Rizal, Emidiana Emidiana, Irine Kartika Pebrianti, M. Saleh Al Amin, Nita Nurdiana, Perawati Perawati, Yudi Irwansi
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Abstract

Load imbalance in an electric power distribution system always occurs and the cause of this imbalance is unbalanced single-phase loads on low voltage network customers. As a result of this load imbalance, a current arises in the neutral of the transformer, which can cause power losses. The aim of the research is to analyse the load imbalance of the Distribution Transformer PC0044, PC0074, PC0088, PC0129, PC1319 on the Tarakan Feeder of PT PLN (Persero) Sukarami Customer Service Unit. The results of the research show that the highest peak load percentage occurs on the PC1319 Distribution Transformer, namely 93.0874%, and based on PLN ED Decree No. 0017.E/DIR/2014, transformer loading. The largest percentage of load imbalance occurs in the PC0044 Distribution Transformer, namely 38.0952%, and based on PLN ED Decree No. 0017.E/DIR/2014, the current imbalance between phases is included in the bad category because the load imbalance is ≥ 25%. The largest percentage of power losses due to neutral current in the transformer neutral conductor occurs in the PC0044 Distribution Transformer, namely 2.6737%, and based on PLN ED Decree No. 0017.E/DIR/2014, the neutral current TR is included in the good category because the power losses due to the neutral current in the transformer neutral conductor are <10%. The largest percentage of power losses due to neutral current flowing to the ground occurs in the PC0044 Distribution Transformer, namely 5.0784%.
PT PLN (Persero) Sukarami 客户服务单位 Tarakan 配电变压器负载不平衡分析
配电系统中总会出现负载不平衡现象,造成这种不平衡的原因是低压电网用户的单相负载不平衡。由于负载不平衡,变压器中性点会产生电流,从而造成电力损失。本研究旨在分析 PT PLN (Persero) Sukarami 客户服务单位 Tarakan 馈线上配电变压器 PC0044、PC0074、PC0088、PC0129 和 PC1319 的负载不平衡问题。研究结果表明,PC1319 配电变压器的峰值负荷率最高,达到 93.0874%,而 PLN ED 第 0017.E/DIR/2014 号法令规定的变压器负荷率为 93.0874%。PC0044 配电变压器的负载不平衡比例最大,为 38.0952%,根据 PLN ED 第 0017.E/DIR/2014 号法令,相间电流不平衡属于不良类别,因为负载不平衡≥ 25%。变压器中性线中的中性电流导致的最大功率损耗百分比出现在 PC0044 配电变压器中,即 2.6737%,根据 PLN ED 第 0017.E/DIR/2014 号法令,中性线电流 TR 属于良好类别,因为变压器中性线中的中性电流导致的功率损耗<10%。PC0044 配电变压器中性线流向地的功率损耗百分比最大,为 5.0784%。
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