MODELING VOLTAGE REGULATION IN OBJECT-ORIENTED ANALYSIS OF DISTRIBUTION SYSTEMS INCLUDING DISPERSED GENERATION

Dispersed Generation (DG) affects the operation of distribution systems; the related modeling and analyzing techniques are affected too. A novel approach to the distribution load flow problem has been recently proposed, based on the Object Oriented (OO) paradigm and including DG. In this paper, the OO modeling and algorithm are extended to account for the inclusion of ULTC transformer's voltage regulation. To validate the proposed steady-state model and to verify its assumption of stability, a detailed dynamic model is developed in Matlab/Simulink environment for a simple case study. The numerical results give evidence of the effectiveness of the proposed steady-state model which accounts for the interaction between DG and ULTC voltage regulation.