Abstract
With a rapid increase of renewable energy generation like wind or solar power, the assessment studies of these kinds of generators are so important in order to appraise their positive as well negative effects. So we have been developing a generalized model of wind generator based on an instantaneous value. Through a model based on an instantaneous value is able to simulate detail behavior of the system, it is time consuming to conduct a simulation. So we have adopted a simplified method for frequency converter to our doubly-fed wind generation systems model, and evaluate it under various conditions.