Summary
In this paper, a synchronous generator excitation controller based on a novel feedforward control action is proposed. The main purpose of the new feedforward action is to enable a more robust excitation of the synchronous generator operating in varying operating conditions when connected to a power grid, for any superimposed stator voltage controller. Namely, the dynamic performance of the proposed controller is compared with a conventional proportional‐integral (PI) controller, and with the PI controller combined with a feedforward action based on the direct component of the stator current. It is analytically shown that the novel controller improves the robustness when compared to 2 aforementioned solutions. Also, by simulation and experimental tests, it is shown that for the loaded synchronous generator, the novel controller, which is designed to have a similar response speed in open circuit as conventional controllers, exhibits up to 2 times faster dynamic performance.
Kratak sadržaj: U ovom radu dat je prikaz procedure za određivanje vrednosti parametara regulatora pobude na osnovu step promene reference u praznom hodu. Regulator pobude sastoji se od PID regulatora i tiristorskog mosta kao izvršnog organa. U sistemu pobude zatvorene su dve povratne sprege: unutrašnja povratna sprega po struji pobude i spoljašnja povratna sprega po struji pobude u slučaju strujnog regulatora odnosno povratna sprega po naponu statora u slučaju naponskog regulatora. Procedura za određivanje parametara opisuje određivanje ekvivalentnog pojačanja regulatora i tiristorskog mosta. U radu su određeni parametri regulatora na osnovu merenja i snimaka sa agregata A5 u TE ''Kolubara A''.
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