Open AccessWide‐area damping control for inter‐area oscillations using inverse filtering technique
Author(s) -
GoldoostSoloot Reza,
Mishra Yateendra,
Ledwich Gerard
Publication year - 2015
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2015.0027
Subject(s) - control theory (sociology) , benchmark (surveying) , controller (irrigation) , inverse system , kalman filter , computer science , inverse , excitation , engineering , mathematics , control (management) , geometry , artificial intelligence , geodesy , electrical engineering , agronomy , biology , geography
In this study, a non‐linear excitation controller using inverse filtering is proposed to damp inter‐area oscillations. The proposed controller is based on determining generator flux value for the next sampling time which is obtained by maximising reduction rate of kinetic energy of the system after the fault. The desired flux for the next time interval is obtained using wide‐area measurements and the equivalent area rotor angles and velocities are predicted using a non‐linear Kalman filter. A supplementary control input for the excitation system, using inverse filtering approach, to track the desired flux is implemented. The inverse filtering approach ensures that the non‐linearity introduced because of saturation is well compensated. The efficacy of the proposed controller with and without communication time delay is evaluated on different IEEE benchmark systems including Kundur's two area, Western System Coordinating Council three‐area and 16‐machine, 68‐bus test systems.