Modeling and cosimulation of AC generator excitation and governor systems using simulink interfaced to PSS/E

This paper presents a method for modeling AC generator excitation and governor systems using Matlab/simulink for utilization in a dynamic cosimulation with a power system planning package PSS/E. Traditionally, modeling goes through a process of understanding the dynamics of the models and deriving the appropriate set of differential and algebraic equations which are then translated to a set of codes for solving computationally. For fundamental network elements, this remains an effective method of doing so. However, in an engineering environment for particular models prone to change from engineering design stand point, it would be a vast advantage to be able to perform this process quickly and effectively in order to validate these models and utilize them quickly in a power system analysis. Here, an interface between PSS/E and Matlab/simulink allows models created in the Matlab/simulink to be co-simulated as part of a network in PSS/E.