A MODEL OF LARGE LOAD AREAS FOR HARMONIC STUDIES IN DISTRIBUTION NETWORKS

This paper describes an improved model of rotating loads in complex lo ad areas. The first section of the paper concentrates on the theoretic al aspects of load modeling in harmonic penetration studies with a par ticular reference to the rotating part of load ?he second section illu strates the results achieved from the experimental surveys conducted b ath in the laboratory and at a major industrial customer, in order to validate the modal proposed in the field The third section describes t he calibration stage of the proposed model based on results from a sta tistical survey conducted at manufacturers on parameter variation vs. frequency with a large sample of bath LV and MV induction motors. Fina lly, some guidelines are also provided for a correct use of the propos ed model in system studies concerning harmonic penetration within elec tric distribution networks.