Dynamic modeling of asynchronized generators for multi-machine power system analysis

A simplified model of asynchronized generator (ASG) is presented for dynamic simulation of multi-machine system including ASGs. This model is developed in the individual d-q reference frame by making various degrees of approximations on the basic machine equations. With this dynamic model, ASG can be represented in various levels of detail, ranging from the 2-order constant flux linkage model to the higher order models with or without the representation of damper windings. The proposed model has been implemented in a time domain transient simulation program based on Newton method and implicit trapezoidal rule. A single-machine infinite bus system and the modified New England 10-machine 39-bus hybrid system including two ASGs are used to test the feasibility of the ASG model. This paper provides the fundamental work for future studies on ASGs' dynamic performance in a large scale power system.