Application of STATCOM for damping torsional oscillations in series compensated AC systems

Author

Patil, K.V. ; Senthil, J. ; Jiang, J. ; Mathur, R.M.

Author_Institution

Dept. of Electr. Eng., Univ. of Western Ontario, London, Ont., Canada

Volume

13

Issue

3

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

237

Lastpage

243

Abstract

This paper presents the results of a study on the application of the recently developed FACTS device, the static compensator (STATCOM), for the damping of torsional oscillations that occur in a series compensated AC system. The IEEE first benchmark system is considered for this study. In order to suppress unstable torsional mode oscillations, a STATCOM with a PI controller to regulate the bus voltage, and with an auxiliary signal derived from the generator speed deviations is employed at the generator terminal. The eigenvalue analysis technique is used for small signal analysis and optimization of the control system parameters is done through step response studies. In addition, dynamic performance of the nonlinear system with optimized STATCOM controller is evaluated under a three-phase fault. Results from the analytical and digital simulation studies reveal the technical feasibility of using STATCOM for damping of turbine-generator torsional oscillations in series compensated AC systems

Keywords

compensation; control system analysis computing; damping; eigenvalues and eigenfunctions; flexible AC transmission systems; optimal control; oscillations; power capacitors; power system analysis computing; power system control; power system stability; reactive power control; step response; torsion; two-term control; Eigenvalue analysis technique; FACTS; PI controller; STATCOM; bus voltage regulation; computer simulation; control simulation; dynamic performance; nonlinear system; series compensated AC systems; small signal analysis; static compensator; step response studies; three-phase fault; torsional oscillations damping; turbine-generator torsional oscillations; unstable torsional mode oscillations suppression; Automatic voltage control; Control systems; Damping; Eigenvalues and eigenfunctions; Nonlinear dynamical systems; Nonlinear systems; STATCOM; Signal analysis; Signal generators; Voltage control;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.707601

Filename

707601