Composite Load Model and Transfer Function Based Load Model for High Motor Composition Load

There are two common forms of dynamic load models suitable for power system dynamic studies: a composite load model and a transfer function based load model. The composite load model typically refers to a combination of an induction motor and a static load in the form of ZIP (constant impedance, constant current, and constant power) load. In this paper, the two types of load models are derived for a high motor composition load, and their performance is compared and analyzed through several case studies considering both voltage and frequency dependency of the load models.