To assign a spectrum to the load element, firstly add a load type to the load element and then set the model to current source. The spectrum must be defined and assigned under the Harmonics page of the load element. For more information about the load element, refer to the technical reference "General Load Model".

In the attached files, the pdf file (LoadSpectrum.pdf) instructs how to synthesize the load spectrum based on an example; the Excel spreadsheet file (LoadSpectrum.xls) calculates the parameters of the PowerFactory model; and the pfd file (LoadSpectrum.pfd) shows the application of the derived spectrum in PowerFactory.