Title :
Countermeasures for self-excited torsional oscillations using reduced order robust control approach
Author :
Abdennour, A.B. ; Hamouda, Rizk M. ; Al-Ohaly, A.A.
Author_Institution :
Dept. of Electr. Eng., King Saud Univ., Riyadh, Saudi Arabia
Abstract :
Summary form only given as follows. Torsional oscillations can be destructive to power systems. Understanding the factors leading to these oscillations and finding appropriate countermeasures has been a major concern. In this paper, a robust controller based on the linear quadratic Gaussian with loop transfer recovery (LQG/LTR) approach is designed to damp these undesired oscillations. The controller uses only one measurable feedback signal (generator speed deviation). A reduced-order version of this controller is also obtained. The robust control results are compared to the “idealistic” full state optimal control. Simulation results revealed that the technique damps all torsional oscillatory modes in a very short time, yet maintains reasonable control actions
Keywords :
control system analysis; control system synthesis; damping; feedback; linear quadratic Gaussian control; oscillations; power system control; reduced order systems; robust control; torsion; control design; control simulation; feedback signal; generator speed deviation; linear quadratic Gaussian; loop transfer recovery; power systems; reduced order robust control approach; reduced-order version; self-excited torsional oscillation countermeasures; state optimal control; Feedback; Optimal control; Power system measurements; Robust control; Signal generators; Velocity measurement;
Conference_Titel :
Power Engineering Society Winter Meeting, 2000. IEEE
Print_ISBN :
0-7803-5935-6
DOI :
10.1109/PESW.2000.850183