Integrated Linear and Nonlinear Control of Unified Power Flow Controllers for Enhancing Power System Stability
Abstract:This paper presents an integrated linear and nonlinear control for a unified power flow controller (UPFC). Three Pulse-Width Modulation (PWM) parameters of the UPFC are controlled by Proportional-Integral-Differential (PID) laws, and an analytic expression of the nonlinear control law for the UPFC phase angle 2 is obtained by a feedback linearization method. This combined linear and nonlinear control strategy enables the UPFC to improve power system transient stability and dynamic performance effectively. Simulation results illustrate the effectiveness of the developed control strategy.
Document Type: Research Article
Affiliations: 1: Department of Electrical Engineering, Tsinghua University, Beijing, China 2: Brunel Institute of Power Systems, Brunel University, Uxbridge, Middlesex, UB8 3PH, U.K. 3: Deptartment of Electrical Engineering, University of Tokyo, Tokyo, Japan
Publication date: April 1, 2003