| Jurnal Angkasa Tahun 2011 Oleh Sugiarto , Hadi, S.P , Tumiran |
Three Phase Load Flow for Unbalanced Power Systems |
| ABSTRAK |
| One of the problems encountered in power system is the appearance of unbalanced voltages and currents in the presence of long untransposed transmission lines or inconcistanced loading formed by users. To asses these unbalance effects in any detail, a 3-phase-load-flow solution that allows to represent of all possible unbalances as they occur in the power systems without making any assumptions is essential. Consequently, a working three phase load flow in the phase frame of reference which based on the sequence component frame and power balance is presented, which forms the basis of a computer program developed for the specific purpose of solving the 3-phase-load-flow problem such as the inductive and resistive effects of multiconductor transmission lines and transmission line losses. To show an assessment of the proposed three phase load flow into unbalance problem, 5-bus transmission networks without transpositions were tested. Moreover, the results reveal that solving the load flow problems with Newton-Raphson can considerably work by simulation program when comparing with some scenarios of unbalanced load of the test network. Keywords: unbalanced voltages and currents, untransposed, sequence component frame |
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