ANALISIS KETIDAK SEIMBANGAN BEBAN PADA TRANSFORMATOR DISTRIBUSI Di PT. PLN (Persero) RAYON CEPU

Abstract

ABSTRACT

Electric power is a very important source of energy for life. One of the electrical components is a distribution transformer which is used to distribute electric power from the substation to the load center. In distribution transformers, load imbalances often occur due to differences in the load on each phase of the secondary side of the transformer. This causes a neutral current to flow in the transformer and can result in power losses. At PT. PLN (Persero) Rayon Cepu has two distribution transformers with the same capacity, namely 50 kVA but the loading is different, the CU1-391 / 9 transformer has an average load of 80% while the CU1-400 transformer has an average loading of 35%.

Based on the calculations that have been made, the average load imbalance on the transformer CU1-391 / 9 for one month is 24.60% at 11.00-16.00 WIB and 11.39% imbalance at 17.00-22.00 WIB. There was also a power loss due to a neutral current for one month of 9.03181842 kWh at 11.00-16.00 WIB and 14.16844809 kWh for power loss at 17.00-22.00 WIB and losses suffered by PLN at 11.00-16.00 WIB amounting to IDR 159,026 , 47 and Rp. 249,468.96. at 17.00-22.00 WIB. For the CU1-400 transformer, the load imbalance for one month is 68.20% at 11.00-16.00 WIB and 64.46% for load imbalance at 17.00-22.00 WIB. Power loss due to neutral current is 46.18865203 kWh at 11.00-16.00 WIB and 54.81367038 kWh at 17.00-22.00 WIB. Losses suffered by PLN amounted to IDR 813,260.22 at 11.00-16.00 WIB and losses due to wasted energy experienced by PLN at 17.00-22.00 WIB amounted to IDR 965,124.03