Load and Induction Motor Models

This chapter starts with a description of static load models, and with a discussion on incorporating such loads into the power system network solution process. It develops dynamic models of inductor motor models and discusses the motor initialization and simulation process. Two types of static load models are considered: the exponential load model and the polynomial load model, also known as the ZIP model. Induction motors of all sizes are used in factories and households, and can be a significant part of the total load. As an induction motor is a rotating machine with inertia and consumes both active and reactive power for its operation, its dynamics need to be captured in stability simulation programs. To incorporate induction motor models into a dynamic simulation program, the model parameters need to be put into per‐unit values. Induction machines have gained popularity with their application in variable‐speed wind turbine‐generators.