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ANALISIS ALIRAN DAYA TIDAK SEIMBANG PADA JARINGAN DISTRIBUSI DENGAN METODE PENDEKATAN LANGSUNG PT. PLN (PERSERO) ULP PERAWANG
The distribution network system in the 20 kV Taurus extension of PT PLN (Persero) ULP
Perawang has a radial type configuration. This extension has unbalanced loading on each
phase. To find out the performance of this extension, an analysis is carried out by modeling
each phase. In this research, power flow, voltage, losses are calculated using the direct
approach method. In this method, the current flowing in each branch is calculated directly
from the load on the downstream side using the BIBC matrix so as to generate branch
currents. Meanwhile, to calculate the bus voltage drop by multiplying the GI bus voltage
against the voltage of each injection bus with the load current on each bus using the BCBV
matrix. After obtaining the voltage drop of each bus obtained, calculate the voltage of each
bus by reducing the GI bus voltage to the voltage drop on each other bus, then iterating using
a tolerance level of 0.001 to achieve convergent voltage. Use the converged voltage to get the
amount of power flow and losses on the line. The calculation results of this method obtained
the lowest bus voltage on bus 55 for phase R by 98.70%, on phase S by 98.78%, and phase T
by 98.87%. The largest channel current is on channel 1, which is phase R of 58.1007 A,
phase S of 56.8029 A and phase T of 57.6574 A. Total active and reactive power losses,
namely phase R of 5.1012 kVA, phase S of 4.7583 kVA, phase T of 3.3874 kVA.
Keywords : Power Flow Unbalance, Power Loss, BCBV and BIBC Matrices
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