Models for wind turbine generating systems and their application in load flow studies

This paper is concerned with developing models of various types of wind turbine generating units (WTGU) used as distributed generation (DG) sources and demonstrating their application for steady state analysis. The model for each class of WTGU developed here facilitates the computation of real and reactive power outputs for a specified wind speed and terminal voltage. The proposed models have been used to study the impact of wind speed and terminal voltage variation on the behavior of each type of WTGU. The application of the proposed models for the load flow analysis of radial systems having WTGU has been demonstrated. Based on these studies we assess the impact of wind based DG on the voltage profile and losses of radial distribution networks. Simulation studies have been carried out on a 33 bus radial distribution system having WTGU as DG sources to illustrate the application of the proposed models.