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Anti-windup compensator design for power system subjected to time-delay and actuator saturation
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Anti-windup compensator design for power system subjected to time-delay and actuator saturation
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Journal Article
Anti-windup compensator design for power system subjected to time-delay and actuator saturation
2019
Overview
In this study, a delay-dependent anti-windup compensator (AWC) is designed for supplementary damping control (SDC) of flexible AC transmission system (FACTS) device to enhance the damping of inter-area oscillations of the power system subjected to time-delay and actuator saturation. By employing global signal measurements, an SDC of FACTS device is designed without considering the effect of time-delay and actuator saturation to stabilise the power system using a robust output feedback controller with pole placement approach. Then, based on the generalised sector condition and Lyapunov–Krasovskii functional, an add-on delay-dependent AWC is designed to mitigate the adverse effect of time-delay and actuator saturation non-linearity. For the design of delay-dependent AWC, sufficient conditions guarantee the asymptotic stability of the closed-loop power system are formulated in the form of linear matrix inequalities (LMIs). These conditions are cast into the LMI-based convex optimisation problem to compute the AWC gains. To evaluate the effectiveness of the proposed controller, non-linear simulations were performed first using MATLAB/Simulink. Then, the authors implemented the proposed controller in real-time using the Opal-RT digital simulator. From the obtained results, it is observed that the proposed controller enhances the damping of inter-area oscillations by compensating the effect of time delay and actuator saturation.
Publisher
The Institution of Engineering and Technology,John Wiley & Sons, Inc,Wiley
Subject
actuator saturation nonlinearity
/ anti-windup compensator design
/ B0260 Optimisation techniques
/ C1180 Optimisation techniques
/ C1320 Stability in control theory
/ C1340K Nonlinear control systems
/ C3340H Control of electric power systems
/ Damping
/ delay-dependent anti-windup compensator
/ delays
/ Design
/ feedback
/ Flexible AC power transmission systems
/ flexible AC transmission system device
/ flexible AC transmission systems
/ inter-area low-frequency oscillations
/ robust output feedback controller
/ SDC
/ supplementary damping control
/ Time lag
