GUIMARÃES, M. K. A.; http://lattes.cnpq.br/6077837377816538; GUIMARÃES, Mary Karlla Araújo.
Resumo:
For transmission nets of energy, the phase unbalances, in general, are small and rare.
However, distribution systems are inherently unbalanced due to lines without
conversion, different numbers of phases for circuits and unbalanced loads . Being like
this, an evaluation more realist of the conditions of operation of a distribution system
demands the use of an algorithm of power flow that considers all the phases of the net.
In this dissertation a version three-phase of the method of the power sum is developed
for vectorial implementation. They are taken into account the asymmetry of the loads,
the phase joining and the possibility o f the net not to be completely three-phase, but to
have spaces single-phase and two-phase also. The method of the power sum is a simple
method, but efficiency computational very elevated in the analysis of load flow in radial
feeders. With easiness the method can be extended to not very mailed feeders, as it is
discussed. The implementation computational is made in Fortran 90, exploring some of
the advanced resources of that language, such as the one of vectorial programming and
you structure of complex data. The routine was applied the feeders of the system of
distribution of Maceio.