Hierarchical Control of a Multimachine Power System Model

The power-frequency control of a multimachine power system model is investigated using combined boiler-turboalternator units interconnected with the general node equations of a transmission network. The boilers, represented by lumped energy storage elements, are combined with the turbine equations using flow- power relations associated with static operating characteristics. The alternators are represented by a linearized set of Park´s equations in a form suitable for investigating the effects of voltage regulator action.