Control of grid-connected split-shaft microturbine distributed generator

In this paper, a split-shaft microturbine model using induction generators is used to assist transient stability of microturbines when connected to the grid as distributed generator. Microturbines can be controlled via two paths, control of the turbine´s mechanical power and control of terminal voltage from induction generator using connected SVC at the generator´s terminal. PI controllers, for SVC and output turbine mechanical power, are designed based on a linearized model using genetic algorithms as optimization technique. Model development and simulation are presented within the MATLAB/Simulink (Power System Analysis Toolbox (PAT)) environment using various toolboxes.