Most electronic household devices can be divided into
three main circuit topologies: SMPS without PFC, SMPS
with passive PFC and SMPS with active PFC. All the
topologies produce current harmonics which depend strongly
on the distortion of the supply voltage.
The application of the current source model is limited and can result in errors of several ten percent if supply voltage is distorted. The current emission depends not only on the magnitude of the voltage harmonics, but also on the angles, and in most of the cases these relations are not linear.Links
http://www.scielo.org.co/pdf/dyna/v82n192/v82n192a17.pdf
