Title :
Passivity-based Nonlinear STATCOM Controller Design for Improving Transient Stability of Power Systems
Author :
Tsai, Hung-Chi ; Chu, Chia-Chi ; Lee, Sheng-Hui
Author_Institution :
Dept. of Electr. Eng., Chang Gung Univ.
Abstract :
This paper presents a novel nonlinear control scheme for designing static synchronous compensators (STATCOM). A passivity-based approach is proposed for designing robust nonlinear STATCOM controller. The mathematical model of STATCOM will be represented by a Euler-Lagrange (EL) system corresponding to a set of EL parameters. By employing the Park´s transformation, the differential geometry approach is used to investigate the power system dynamics with considering STATCOM under the synchronous d-q frame. The STATCOM controller based on passivity is obtained with a feedback control law from linear system models. Digital computer simulation for a large operation point variations have been studied the STATCOM controller design. Simulation results show that the proposed STATCOM controller can effectively enhance transient stability of the power system even in the presence of large operation point variations
Keywords :
differential geometry; feedback; nonlinear control systems; power system control; power system transient stability; static VAr compensators; EL; Euler-Lagrange system; Park´s transformation; STATCOM controller design; differential geometry approach; digital computer simulation; feedback control law; linear system model; nonlinear control scheme; passivity-based approach; power system dynamics investigation; power systems transient stability; static synchronous compensators; synchronous d-q frame; Automatic voltage control; Control systems; Geometry; Mathematical model; Nonlinear control systems; Power system modeling; Power system simulation; Power system stability; Power system transients; Robust control; Euler-lagrange System; Passivity based control; Static Synchronous Compensator (STATCOM);
Conference_Titel :
Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES
Conference_Location :
Dalian
Print_ISBN :
0-7803-9114-4
DOI :
10.1109/TDC.2005.1547093