Conceptual analysis and representation of event-triggering mechanism in power system
04 Mar 2016-pp 1-4
TL;DR: In this article, a conceptual design methodology is proposed for event-triggered based power system control, which is adopted to reduce the communication burden between origin of the remote control signal and the controller location.
Abstract: A conceptual design methodology is proposed for event-triggered based power system control. The event-triggering mechanism is adopted to reduce the communication burden between origin of the remote control signal and the controller location. The remote signal is transmitted to the controller location only when a pre-defined state dependent event-triggering condition, is satisfied. The triggering condition is derived from a stability criterion, and is monitored continuously by a separate event-monitoring unit located at the origin of the remote signal. The stability of the resulting closed loop system is guaranteed via the input-to-state stability (ISS) technique. The proposed event triggered mechanism is implemented on single machine infinite bus test power system. The validation of proposed mechanism is carried out through the simulation studies on MATLAB/Simulink platform. The numerical results show the efficacy of the controller in managing the communication channel usage without compromising the stated system stability objectives.
Citations
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01 Jan 2002
TL;DR: In this article, it is shown that Lebesgue sampling gives better performance for some simple systems than traditional Riemann sampling, which is an analog of integration theory and is called event-based sampling.
Abstract: The normal approach to digital control is to sample periodically in time. Using an analog of integration theory we can call this Riemann sampling. Lebesgue sampling or event based sampling is an alternative to Riemann sampling. It means that signals are sampled only when measurements pass certain limits. In this paper it is shown that Lebesgue sampling gives better performance for some simple systems.
77 citations
22 Feb 2023
TL;DR: In this article , a transient stability examination is carried out to distinguish PSS execution under the transient inadequacy condition, and the repeat of PSS using frequency response strategy that makes use of the system's frequency under transient conditions.
Abstract: Understanding and analyzing power system stability behavior under various conditions is the goal of power system stability analysis. The PSS is utilized by generators to address stability issues. To distinguish PSS execution under the transient inadequacy condition, a transient stability examination is carried out. This paper manages power system stabilizers to enhance the system's dynamic stability. Reenactment programming, such as MATLAB, licenses such evaluation on test structures, such as the 3 machine 9 Bus systems, which are intended to calculate various apparatuses of system under various conditions, despite the fact that such an examination cannot be carried out in the field. Various PSS have been used in the past to tune PSS frequency. In addition to comparing the obtained results to those of other PSS, we tuned the repeat of PSS using frequency response strategy that makes use of the system's frequency under transient conditions. The simpowersystem MATLAB tool kit was used to plan and analyze transient stability for the System with PSS.
References
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Book•
01 Jan 1994
TL;DR: In this article, the authors present a model for the power system stability problem in modern power systems based on Synchronous Machine Theory and Modelling, and a model representation of the synchronous machine representation in stability studies.
Abstract: Part I: Characteristics of Modern Power Systems. Introduction to the Power System Stability Problem. Part II: Synchronous Machine Theory and Modelling. Synchronous Machine Parameters. Synchronous Machine Representation in Stability Studies. AC Transmission. Power System Loads. Excitation in Stability Studies. Prime Mover and Energy Supply Systems. High-Voltage Direct-Current Transmission. Control of Active Power and Reactive Power. Part III: Small Signal Stability. Transient Stability. Voltage Stability. Subsynchronous Machine Representation in Stability Studies. AC Transmission. Power System Loads. Excitation in Stability Studies. Prime Mover and Energy Supply Systems, High-Voltage Direct-Current Transmission. Control of Active Power and Reactive Power. Part III: Small Signal Stability. Transient Stability. Voltage Stability. Subsynchronous Oscillations. Mid-Term and Long-Term Stability. Methods of Improving System Stability.
13,467 citations
"Conceptual analysis and representat..." refers methods in this paper
...These oscillations are damped out using stabilizers or controllers armed with generating unit [1]-[4]....
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TL;DR: This note investigates a simple event-triggered scheduler based on the paradigm that a real-time scheduler could be regarded as a feedback controller that decides which task is executed at any given instant and shows how it leads to guaranteed performance thus relaxing the more traditional periodic execution requirements.
Abstract: In this note, we revisit the problem of scheduling stabilizing control tasks on embedded processors. We start from the paradigm that a real-time scheduler could be regarded as a feedback controller that decides which task is executed at any given instant. This controller has for objective guaranteeing that (control unrelated) software tasks meet their deadlines and that stabilizing control tasks asymptotically stabilize the plant. We investigate a simple event-triggered scheduler based on this feedback paradigm and show how it leads to guaranteed performance thus relaxing the more traditional periodic execution requirements.
3,695 citations
"Conceptual analysis and representat..." refers background or methods in this paper
...Recently, [12][14] have proposed event based aperiodic control technique, where control signal is computed and transmitted at the system end only when a predefined event condition is violated....
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...Then the system and state feedback control law can be written as [12], [14]: ( ) = ( ) + ( ) (7) ( ) = ( ) + ( ) (8) The variable ( ) ∈ R is described as measurement error of state ( ) and defined as: ( ) = ( ) − ( ), ∀ ∈ [ , ) (9) The stability of (7) is proved through ISS theory [19], [20], [21],[22]....
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...The event based aperiodic control technique have been proposed in [12]-[14], where control signal is computed and transmitted at the system end only when a predefined event condition is violated....
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Book•
30 Apr 1980TL;DR: In this paper, the authors present a mathematical model of the Synchronous Machine and the effect of speed and acceleration on the stability of a three-phase power system with constant impedance load.
Abstract: Preface.Part I: Introduction.Chapter 1: Power System Stability.Chapter 2: The Elementary Mathematical Model.Chapter 3: System Response to Small Disturbances.Part II: The Electromagnetic Torque.Chapter 4: The Synchronous Machine.Chapter 5: The Simulation of Synchronous Machines.Chapter 6: Linear Models of the Synchronous Machine.Chapter 7: Excitation Systems.Chapter 8: Effect of Excitation on Stability.Chapter 9: Multimachine Systems with Constant Impedance Loads.Part III: The Mechanical Torque Power System Control and Stability.Chapter 10: Speed Governing.Chapter 11: Steam Turbine Prime Movers.Chapter 12: Hydraulic Turbine Prime Movers.Chapter 13: Combustion Turbine and Combined-Cycle Power Plants.Appendix A: Trigonometric Identities for Three-Phase Systems.Appendix B: Some Computer Methods for Solving Differential Equations.Appendix C: Normalization.Appendix D: Typical System Data.Appendix E: Excitation Control System Definitions.Appendix F: Control System Components.Appendix G: Pressure Control Systems.Appendix H: The Governor Equations.Appendix I: Wave Equations for a Hydraulic Conduit.Appendix J: Hydraulic Servomotors.Index.
3,249 citations
Book•
30 Jul 1997TL;DR: This paper presents a meta-modelling procedure called Multimachine Dynamic Models for Energy Function Methods, which automates the very labor-intensive and therefore time-heavy and expensive process of Synchronous Machine Modeling.
Abstract: 1 Introduction 2 Electromagnetic Transients 3 Synchronous Machine Modeling 4 Synchronous Machine Control Models 5 Single-Machine Dynamic Models 6 Multimachine Dynamic Models 7 Multimachine Simulation 8 Small-Signal Stability 9 Energy Function Methods Appendix A: Integral Manifolds for Model Bibliography Index
2,004 citations
TL;DR: In this article, the stability of synchronous machines under small perturbations is explored by examining the case of a single machine connected to an infinite bus through external reactance, and the results are shown to be similar to ours.
Abstract: The phenomena of stability of synchronous machines under small perturbations is explored by examining the case of a single machine connected to an infinite bus through external reactance.
1,939 citations