In this paper a steady-state model of a single-phase power supply is presen
ted. The model rakes into account the influence of feeder harmonic voltages
on the non-linear load behaviour. With this model we can observe that, whe
n the distorting load consumption is important the harmonic interaction mus
t be considered in order to obtain correct results. This model has been imp
lemented in a harmonic load-flow program in order to per farm harmonic stud
ies in network and industrial installation.