Countermeasures for self-excited torsional oscillations using reduced order robust control approach

Author

Abdennour, Adel Ben ; Hamouda, Rizk M. ; Al-Ohaly, A.A.

Author_Institution

Dept. of Electr. Eng., King Saud Univ., Riyadh, Saudi Arabia

Volume

15

Issue

2

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

779

Lastpage

784

Abstract

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

damping; feedback; linear quadratic Gaussian control; oscillations; power system control; power system stability; reduced order systems; robust control; torsion; generator speed deviation; linear quadratic Gaussian; loop transfer recovery; measurable feedback signal; reduced order robust control; robust controller; self-excited torsional oscillations; torsional oscillations countermeasures; undesired oscillations damping; Damping; Feedback; Optimal control; Power generation; Power system modeling; Power system simulation; Robust control; Shafts; Signal generators; Static VAr compensators;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.867173

Filename

867173