Journal ArticleDOI
A delay-dependent anti-windup compensator for wide-area power systems with time-varying delays and actuator saturation
TLDR
A delay-dependent anti-windup compensator is designed for wide-area power systems to enhance the damping of inter-area low-frequency oscillations in the presence of time-varying delays and actuator saturation using an indirect approach and maximizes the estimation of the region of attraction.Abstract:
In this paper, a delay-dependent anti-windup compensator is designed for wide-area power systems to enhance the damping of inter-area low-frequency oscillations in the presence of time-varying delays and actuator saturation using an indirect approach. In this approach, first, a conventional wide-area damping controller is designed by using H∞ output feedback with regional pole placement approach without considering time-varying delays and actuator saturation. Then to mitigate the effect of both time-varying delays and actuator saturation, an add-on delay-dependent anti-windup compensator is designed. Based on generalized sector conditions, less conservative delay-dependent sufficient conditions are derived in the form of a linear matrix inequality ( LMI ) to guarantee the asymptotic stability of the closed-loop system in the presence of time-varying delays and actuator saturation by using Lyapunov-Krasovskii functional and Jensen integral inequality. Based on sufficient conditions, the LMI-based optimization problem is formulated and solved to obtain the compensator gain which maximizes the estimation of the region of attraction and minimizes the upper bound of L2-gain. Nonlinear simulations are performed first using MATLAB / Simulink on a two-area four-machine power system to evaluate the performance of the proposed controller for two operating conditions, e.g., 3-phase to ground fault and generator 1 terminal voltage variation. Then the proposed controller is implemented in real-time on an OPAL-RT digital simulator. From the results obtained it is verified that the proposed controller provides sufficient damping to the inter-area oscillations in the presence of time-varying delays and actuator saturation and maximizes the estimation of the region of attraction.read more
Citations
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Journal ArticleDOI
Dynamic anti-windup design for linear systems with time-varying state delay and input saturations
Yonggang Chen,Kunbao Ma,Rui Dong +2 more
TL;DR: In this article , a dynamic anti-windup compensator is designed for linear systems with time-varying state delay, input saturations and external disturbances, and sufficient conditions are established under which the state trajectories of the closed-loop systems are bounded and meanwhile the performance can be guaranteed.
Journal ArticleDOI
Event-triggering $${H}_{\infty }$$ H ∞ -based observer combined with NN for simultaneous estimation of vehicle sideslip and roll angles with network-induced delays
TL;DR: The design of an H-based observer that simultaneously estimates both the sideslip angle and the roll angle of a vehicle for a networked control system, with networked transmission delay based on an event-triggered communication scheme combined with neural networks (NN).
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$$H_{\infty }$$ H ∞ Performance-Based Sliding Mode Control Approach for Load Frequency Control of Interconnected Power System with Time Delay
TL;DR: In this paper, a sliding mode control (SMC) approach is proposed to design a performance-based load frequency controller for interconnected power system (IPS) with time delay, and a sliding surface function is designed to enhance dynamic performance of the power system.
Journal ArticleDOI
Enhanced Stability Criteria for Discrete-time Systems with Time-varying Delay
Lijuan Zhu,Chengyun Zhu +1 more
TL;DR: In this paper, an improved free-matrix-based summation inequality is proposed to make full use of the improved inequality to bound the upper bounds of the difference Lyapunov-Krasovskii functional (LKF).
Journal ArticleDOI
Coordinated design of delay-dependent wide-area damping controllers considering multiple time delays
TL;DR: This paper investigates coordinated design of multiple wide-area damping controllers (WADCs) for damping multiple inter-area oscillations considering communication delays in multiple control loop using modified IEEE 10-machine 39-bus power system.
References
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Proceedings ArticleDOI
Power system supplementary damping controllers in the presence of saturation
TL;DR: In this paper, the authors present the analysis and a method to design supplementary damping controllers (SDCs) for synchronous generators considering the effects of saturation limits, where the state trajectories must remain inside the domain of attraction.
Proceedings ArticleDOI
Real-time digital simulation based laboratory test-bench development for research and education on solar pv systems
TL;DR: This paper presents the development of a laboratory test-bench for research and teaching on power electronics for solar PV system integration based on a real-time digital simulation (RTS) platform that allows flexible and rapid development through hardware-in-the-loop simulations.