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.
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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.
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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).
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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
More filters
Journal ArticleDOI
Auxiliary function-based integral inequalities for quadratic functions and their applications to time-delay systems
TL;DR: This paper suggests a new class of integral inequalities for quadratic functions via intermediate terms called auxiliary functions, which produce more tighter bounds than what the Jensen inequality produces.
Journal ArticleDOI
Hierarchy of LMI conditions for the stability analysis of time-delay systems☆
TL;DR: The present paper aims at providing a generic set of integral inequalities which are asymptotically non conservative and then to design functionals driven by these inequalities, which form a hierarchy of LMI which is competitive with the most efficient existing methods.
Journal ArticleDOI
A survey of linear matrix inequality techniques in stability analysis of delay systems
Shengyuan Xu,James Lam +1 more
TL;DR: The purpose of this article is to survey the recent results developed to analyse the asymptotic stability of time-delay systems and give special emphases to the issues of conservatism of the results and computational complexity.
Journal ArticleDOI
Stability and Performance for Saturated Systems via Quadratic and Nonquadratic Lyapunov Functions
TL;DR: A systematic Lyapunov approach to the regional stability and performance analysis of saturated systems in a general feedback configuration to ensure that the state remain inside the level set of a certain LyAPunov function where the PDI or the NDI is valid.
Journal ArticleDOI
An antiwindup approach to enlarging domain of attraction for linear systems subject to actuator saturation
TL;DR: The article considers linear systems subject to actuator saturation and an antiwindup technique is used to enlarge the domain of attraction of the closed-loop system under an a priori designed linear dynamic feedback law.