Title :
Design of a rule-based controller for STATCOM
Author :
Li, Chun ; Jiang, Qirong ; Wang, Zhonghong ; Retzmann, Dietmar
Author_Institution :
Tsinghua Univ., Beijing, China
fDate :
31 Aug-4 Sep 1998
Abstract :
A ±20 MVAr STATCOM (static synchronous compensator) using GTO technology was commissioned in China in 1998. The STATCOM is designed to supply fast voltage control and to enhance the damping of inter-area electromechanical oscillations of the system. In this paper, by investigating the added synchronizing and damping torque induced by STATCOM, the conflicts between these control objectives are analyzed and the limitations or even invalidity of the fixed-parameters damping controller for certain system parameters and load conditions is discussed. A rule-based controller, which employs bang-bang, fuzzy logic or fixed-parameter PI control strategy according to the operation state of the system, is designed. The advantages of the proposed controller over the fixed-parameter PI controller are demonstrated by nonlinear digital simulations
Keywords :
bang-bang control; control system synthesis; damping; fuzzy control; oscillations; power system control; reactive power control; static VAr compensators; thyristor applications; torque; two-term control; 20 MVAr; China; GTO technology; STATCOM; bang-bang control; damping enhancement; damping torque; fast voltage control; fixed-parameter PI control; fuzzy logic control; inter-area electromechanical oscillations; load conditions; nonlinear digital simulations; oscillations damping; rule-based controller; static synchronous compensator; synchronizing torque; Automatic voltage control; Control systems; Damping; Frequency synchronization; Fuzzy logic; Pi control; Static VAr compensators; Thyristors; Torque control; Voltage control;
Conference_Titel :
Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE
Conference_Location :
Aachen
Print_ISBN :
0-7803-4503-7
DOI :
10.1109/IECON.1998.724288
