Abstract
In this paper a novel method for the stator voltage regulator of a synchronous generator based on the interval plant mode, is presented. Namely, it is shown in the literature that, in order to design a controller for the first-order compensator, the limited number of interval plants needs to be examined. Consequently, the intervals of the plant model parameter variations used to calculate the four extreme interval plants required for the sequential PI controller design are determined. The controller is designed using frequency-domain-based techniques, while its robust performance is examined using simulation tests.
Highlights
In this paper a novel method for the stator voltage regulator of a synchronous generator based on the interval plant mode
it is shown in the literature that
in order to design a controller for the first-order compensator
Summary
Projektovanje RSN je u okviru ovog rada realizovano upotrebom linearizovanog modela SG trećeg reda definisanog u 28. Shodno tome dobijen je sledeći model, koji se pod pretpostavkom rada generatora sa konstantnom brzinom svodi na jednačine električnog podsistema generatora prvog reda. Na slici 1 data je nelinearna karakteristika pojačanja k1 u zavisnosti od ekvivalentne impedanse mreže. Za slučaj agregata snage 200 MW koji je modelovan u okviru rada uzeto je da se Xe / Xq menja u opsegu 0, 0.6 , što na osnovu slike 1 za posledicu ima promenu vrednosti parametra k1 u opsegu k1 [1, 1.6] (gde Xq predstavlja sinhronu statorsku reaktansu generatora u q osi rotacionog referetnog koordinatnog sistema sinhronog sa rotorom, i Xe ekvivalnentu reaktansu prenosnog voda). Pošto su polazni parametri generatora snage 200 MW analiziranog u radu jednaki k0 = 1450 i T d0 = 5.5 s, na osnovu opsega promene vrednosti parametara k1 i k2 linearizovanog modela (2) može se izvesti sledeći intervalni model SG. Na osnovu intervalnog modela (4) u narednom poglavlju izvršeno je projektovanje robusnog regulatora pobude SG
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