APPLICATION OF POWER SYSTEM STABILIZERS PSS3B TO ELECTROMECHANICAL SWING DAMPING IN MULTI-MACHINE POWER SYSTEM

摘要

Presented are the results of parameter optimisation of dual input power system stabilizers of type PSS3B designed for damping rotor swings of synchronous generators in the power system of a non-linear mathematical model. It is assumed that the power system consists of generator and receiving nodes, all interconnected by the power system network. The generator with its excitation system and the power system stabilizer operate within the generator nodes. The generator is powered by a driving turbine with a governor system. The parameters of the system stabilizers were determined by minimising the generalised quality factor in the multi-machine power system. The quality factor was calculated from the deviations of the active power, rotational speed and generator voltage in individual generator nodes for transient symmetrical short-circuits in the system transmission lines. The exemplary optimisation computations were carried out for a CIGRE 7-machine power system. The presented computations were performed for the systems with and without stabilizers.