SYNCHRONOUS GENERATOR OSCILLATIONS DAMPING

V diplomskem delu so opisani vzroki nihanj sinhronskih generatorjev (SG), ki so sinhronizirani na elektroenergetsko omrežje. Predstavljeno je delovanje SG v stacionarnem in dinamičnem stanju. Za analizo nihanj SG je uporabljen lineariziran model SG tretje stopnje brez in z regulacijo napetosti. Nadalje so predstavljene možnosti za dušenje nihanj SG. Izpostavljen je stabilizator kolesnega kota, ki temelji na meritvi rotorske hitrosti SG, na osnovi katere generira dodatni stabilizacijski signal, ki se prišteva k referenčni vrednosti statorske napetosti. Predstavljena je zgradba in določitev parametrov stabilizatorja ter njegovo delovanje v različnih delovnih točkah SG. Ugotovljeno je nelinearno obnašanje SG v različnih delovnih točkah, zato je predlagan adaptivni pristop določanja parametrov stabilizatorja SG, ki izboljša dušenje nihanj SG v celotnem področju delovanja.In this diploma paper the causes for the oscillation of the synchronous generators (SG), which are synchronised to the electro energetic network, are described. The activity of the SG in the stationary and dynamic state is described. For the analysis of the oscillation of the SG, a third degree linearized model of the SG without and with the regulation of the voltage is used. Further on the possibilities for damping of the oscillation of the SG are described. The stabilizer of the wheel degree is exposed, which is founded on the measurement of the rotor speed of the SG, which is the basis of the generation of the stabilization signal, which is added to the referential level of the stator voltage. The structure and the definition of the parameters of the stabilizer are presented and also its performance in various working sections of the SG. A non-linear performance of the SG in various working sections is determined, therefore an adaptive approach to the defining of the parameters of the stabilizer of the SG is proposed, which improves the damping of the oscillation of the SG in the whole operating range