Robust control of SSSC to improve torsional damping

Author

Pillai, G.N. ; Ghosh, Arindam ; Joshi, A.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., Kanpur, India

Volume

3

fYear

2001

fDate

2001

Firstpage

1115

Abstract

In this paper, the H_∞ optimal control theory has been used to design a robust controller for regulating DC link voltage of a static synchronous series compensator (SSSC). Subsynchronous resonance (SSR) analysis of the robust SSSC compensated power system is presented. The power system used in this study is the IEEE first benchmark model for SSR analysis. To design the robust controller the nominal transfer function is reduced to such an order that the essential dynamic characteristics of the system are retained in the frequency range of interest. Eigenvalue analysis and nonlinear simulation using PSCAD/EMTDC have shown that the controller can provide satisfactory torsional performance under a wide variation in the operating conditions. A damping controller is also proposed to increase the damping of the torsional modes

Keywords

EMTP; H^∞ control; damping; eigenvalues and eigenfunctions; power system control; robust control; static VAr compensators; subsynchronous resonance; torsion; transfer functions; voltage control; DC link voltage regulation; H_∞ optimal control theory; IEEE first benchmark model; PSCAD/EMTDC; damping controller; eigenvalue analysis; essential dynamic characteristics; nominal transfer function; nonlinear simulation; operating conditions; robust control; robust controller design; static synchronous series compensator; subsynchronous resonance analysis; torsional damping improvement; torsional performance; Damping; Optimal control; PSCAD; Power system analysis computing; Power system dynamics; Power system modeling; Power system simulation; Resonance; Robust control; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society Winter Meeting, 2001. IEEE

Conference_Location

Columbus, OH

Print_ISBN

0-7803-6672-7

Type

conf

DOI

10.1109/PESW.2001.917227

Filename

917227