Nonlinear self-tuning control of a flexible AC transmission system

Abstract

There is currently interest in using thyristor controlled series capacitors (TCSC) in transmission lines for the dual purpose of altering the steady-sme power flow and enhancing system stability. Devices such as these come under the purview of flexible AC transmission systems (FACTS). We propose the use of nonlinear self-tuning control to enhance the stibility of a multimachine power system using the TCSC, especially when faced with uncertainties in the transmission system parameters. A nonlinear generalized predictive criterion is used to derive the self-tuning controller. Simulation results illustrate the effectiveness of the proposed nonlinear self-tuning controller in simultaneously damping local-mode and inter-area oscillations.

Fuzzy c-means clustering damping controller design for a power system installed with TCSC

“…The Heffron-Phillips model of the single machine infinite bus (SMIB) system with TCSC is obtained using the linearized equations (15)(16)(17)(18). The corresponding block diagram model is shown in Fig.…”

“…In recent years, the study of TCSC control schemes has attracted increasing attentions, and many approaches have been applied to TCSC controller design, such as pole placement technique [12], robust control [13][14][15][16], adaptive control methods [17,18]. Some studies [19][20][21][22][23][24] also have used of intelligent methods.…”