Development of load models in electrical power system

Abstract

In order to derive more realistic load models in stability studies, suitable methods for building load models are presented in this thesis. Load types studied here are static and induction motor loads. Models for individual loads are developed are then put them together to a composite load. A computer program is developed for representing steady state and dynamic characteristics of loads due to voltage and frequency variations. Results obtained from the proposed models are compared with the conventional models such as constant impedance, constant current etc. Differences are found from the comparison results, especially when loads consist of induction motors. This is because the conventional models neglect the dynamic behavior of loads while the proposed models consider these effects, which should be more accurate.