Model and Object Oriented Program to Analyse the Harmonic Distortion and Asymmetry in Power Systems

For harmonic polluted electrical networks, the load flow calculation consists in the determination of steady state quantities for each harmonic component at a time. On the other hand, the load flow calculation for unbalanced/asymmetrical electric networks consists in the determination of steady state quantities for each phase at a time. The theoretical relationships proposed in literature are complex and it is difficult to implement them in harmonic polluted and unbalanced/asymmetric complex systems containing many elements, in various combinations. In this paper, the authors propose to model the harmonic complex three-phase quantities through abstract data types. As a result, electrical engineering laws, as Ohm or Kirchhoff, are reduced to simplified expressions corresponding to fundamental harmonic component single-phase case.