The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Xuesong Zhou - One of the best experts on this subject based on the ideXlab platform.
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Analysis of Voltage Stability of Power Systems Using the Bifurcation Theory
2018 Chinese Control And Decision Conference (CCDC), 2018Co-Authors: Youjie Ma, Shaofeng Lv, Xuesong Zhou, Xudong Zhang, Jingping ZhangAbstract:In order to research power system voltage stability, based on the basic concepts and principles of the Bifurcation Theory, the qualitative behavior of power system voltage stability dynamics as modeled by differential algebraic equations is discussed. Bifurcation phenomena and the effect of these Bifurcations on the voltage stability analysis are overviewed in power systems. The application of static and dynamic Bifurcation in voltage stability studies is discussed in detail, respectively. Two main kinds of Bifurcations, that is, saddle-node Bifurcation(SNB), Hopf Bifurcation(HB) which result in voltage instability, are analyzed emphatically. The advantages and disadvantages of the computation methods are compared. The effect of interaction of Bifurcations on voltage stability is also discussed briefly. Multi-parameters problems are intrinsically important in power system voltage stability, and the issues involving higher Bifurcation will certainly emerge, other further research fields of Bifurcation Theory applied in voltage stability analysis is predicted in the future.
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Voltage Stability Analysis of Power System Based on Bifurcation Theory
2018 IEEE International Conference on Mechatronics and Automation (ICMA), 2018Co-Authors: Xuesong Zhou, Zhiqiang GaoAbstract:In order to study the voltage stability of power system, the basic Bifurcation Theory is used to analyze the common Bifurcation phenomenon and the effects of Bifurcation on the voltage stability. In this paper, the application of static and dynamic Bifurcation in voltage stability studies is reviewed respectively. In the static Bifurcation analysis, the saddle node Bifurcation (SNB) and the limit induced Bifurcation (LIB) are analyzed emphatically. In the dynamic Bifurcation analysis, Hopf Bifurcation (HB) and singular induced Bifurcation (SIB) are analyzed emphatically. These four kings of Bifurcation causing mainly voltage instability are discussed and summarized detailedly; the advantages and disadvantages of these methods are compared. Finally, the further research field of Bifurcation Theory applied in voltage stability analysis is prospected.
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Application of Bifurcation Theory to Voltage Stability in Power System
Advanced Materials Research, 2013Co-Authors: Xuesong Zhou, Mo Chen, You JieAbstract:In order to study on the problem of voltage stability of power system, this paper describes the static Bifurcation analysis and the dynamic Bifurcation analysis in voltage stabilization analysis of power system and its relationship with the voltage stability,discusses the voltage instability caused by two main Bifurcation formal definition, the occurrence of the conditions and the calculation of the Bifurcation point, and points out advantages and disadvantages of various algorithms. Finally the paper looks forward to further study of the Bifurcation Theory in terms of voltage stability.
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Summarization on Stability of Wind Power Systems Based on Bifurcation Theory
Applied Mechanics and Materials, 2012Co-Authors: Xuesong Zhou, Hua Xin Zhai, You JieAbstract:With wind farm capacity continuously increasing, remarkable characteristics of wind power make nonlinear dynamic characteristics of wind power system more apparent than conventional power system. Domestic and international experience shows that the voltage instability is main forms of wind power system instability. The Bifurcation Theory is one of the most powerful tools in analysis of structure stability of nonlinear dynamic system. Therefore application of Bifurcation Theory not only reveals the voltage stability mechanism, but also has important theoretic value and practical value for the security analysis of the whole power system, especially for voltage stability of wind power system.
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Research of Photovoltaic Grid System Voltage Stability Based on the Bifurcation Theory
Advanced Materials Research, 2011Co-Authors: You Jie, Cheng Liao, Xuesong ZhouAbstract:In grid-connected photovoltaic system, the inverter, grid device, power electronic devices etc. They consume a large quantity of reactive power; mostly in distribution system, a perceptual load must also consume reactive power, these makes big interference interconnection of photovoltaic system after serious test the voltage stability. Therefore, carry on research of voltage stability in grid-connected photovoltaic system has important significance. With the voltage stability, voltage quality, analysis the possible influence of photovoltaic grid power system on power grid in safe and stable operation. Discuss probable Bifurcation behavior in photovoltaic grid system. Introduce the basic concept of Bifurcation, and then review the application of Bifurcation Theory in research of voltage stability from two aspects: static Bifurcation and dynamic Bifurcation. Finally take a look at Bifurcation Theory research of photovoltaic grid system voltage stability.
Alexander Knospe - One of the best experts on this subject based on the ideXlab platform.
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Principles for the application of Bifurcation Theory for the systematic analysis of nuclear reactor stability, Part1: Theory
Progress in Nuclear Energy, 2019Co-Authors: D. Hennig, Carsten Lange, Rizwan-uddin, A. Dokhane, Alexander KnospeAbstract:Abstract This article is an introduction and motivational contribution for the special issue “Nuclear Reactors and related nonlinear systems: Aspects of efficient modeling and stability analysis”. The authors aim to demonstrate the performance of the systematic Bifurcation analysis for the stability analysis of nonlinear dynamic systems such as nuclear and thermal-hydraulic systems. In a first part, the motivation of this approach is explained in detail (part 1: Theory) and the authors provide some mathematical basics, which are necessary in order to understand the results of 3 examples of the application of Bifurcation Theory which will be discussed in more detail in part 2 (Applications, Progress in Nuclear Energy 113 (2019) 263-280). In this context, we would also like to point to the importance of modern methods of model order reduction (MOR) and the relationship between mathematically optimized reduced order models (ROMs) and simplified dynamical models. To represent the benefits of the Bifurcation Theory for our purposes compactly, already published results of earlier works were selected and partly new interpreted and revised on the advanced knowledge level. The conclusions are the result of work in this field in recent years and should be a basis of discussion for the future work of the community.
Marco A S Souto - One of the best experts on this subject based on the ideXlab platform.
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existence of solution for a nonlocal dispersal model with nonlocal term via Bifurcation Theory
Journal of Differential Equations, 2020Co-Authors: Claudianor O Alves, Natan De Assis Lima, Marco A S SoutoAbstract:Abstract In this paper we study the existence of solution for the following class of nonlocal problems L 0 u = u ( λ − ∫ Ω Q ( x , y ) | u ( y ) | p d y ) , in Ω , where Ω ⊂ R N , N ≥ 1 , is a smooth bounded domain, p > 0 , λ is a real parameter, Q : Ω × Ω → R is a nonnegative function, and L 0 : C ( Ω ‾ ) → C ( Ω ‾ ) is a nonlocal dispersal operator. The existence of solution is obtained via Bifurcation Theory.
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existence of solution for a nonlocal dispersal model with nonlocal term via Bifurcation Theory
arXiv: Analysis of PDEs, 2017Co-Authors: Claudianor O Alves, Natan De Assis Lima, Marco A S SoutoAbstract:In this paper we study the existence of solution for the following class of nonlocal problems \[ L_0u =u \left(\lambda - \int_{\Omega}Q(x,y) |u(y)|^p dy \right) , \ \mbox{in} \ \Omega, \] where $\Omega \subset \mathbb{R}^{N}$, $N\geq 1$, is a bounded connected open, $p>0$, $\lambda$ is a real parameter, $Q:\Omega \times \Omega \to \mathbb{R}$ is a nonnegative function, and $L_0 : C(\overline{\Omega}) \to (\overline{\Omega})$ is a nonlocal dispersal operator. The existence of solution is obtained via Bifurcation Theory.
Michitsugu Mori - One of the best experts on this subject based on the ideXlab platform.
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Stability Analysis of BWRs Using Bifurcation Theory
Journal of Nuclear Science and Technology, 1993Co-Authors: Masashi Tsuji, Katsuhisa Nishio, Masakuni Narita, Yuichi Ogawa, Michitsugu MoriAbstract:Abstract This paper presents a new approach using the Bifurcation Theory for the stability analysis of BWRs. In this approach, the dependencies of the equilibrium states on the parameters that have a large influence on the stability are investigated topological over a wide range of phase space. The stability information can be derived from the analysis of the Bifurcation phenomena on the equilibrium states. This investigation enabled us to obtain qualitative and global information on the stability of a nonlinear system. The new approach was applied to the analysis of the stability associated with in-phase power oscillation (core reactivity stability). The loss of linear stability took place at a lower reactor power as the coolant flow rate decreased, and this instability occurs at the Hopf Bifurcation point. The sensitivity analysis of the stability boundary for the various parameters revealed that the channel hydrodynamics heavily play a significant role in the stability. The Hopf Bifurcation analysis pr...
Doraiswami Ramkrishna - One of the best experts on this subject based on the ideXlab platform.
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Using Bifurcation Theory for Exploring Pain
Industrial & Engineering Chemistry Research, 2019Co-Authors: Parul Verma, Achim Kienle, Dietrich Flockerzi, Doraiswami RamkrishnaAbstract:Pain is a common sensation that inescapably arises due to injuries as well as various diseases and disorders. However, for the same intensity of disturbance arising due to the foregoing causes, the threshold for pain sensation and perception varies among individuals. Here, we present a computational approach using Bifurcation Theory to understand how the pain sensation threshold varies and how it can be controlled, the threshold being quantified by the electrical activity of a pain-sensing neuron. To this end, we explored the Bifurcations arising from a mathematical model representing the dynamics of this neuron. Our findings indicate that the Bifurcation points are sensitive to specific model parameters. This demonstrates that the pain sensation threshold can change, as shown in experimental studies found in literature. Further investigation using our Bifurcation approach coupled with experimental studies can facilitate rigorous understanding of the pain response mechanism and provide strategies to control the pain sensation threshold.
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Using Bifurcation Theory for Exploring Pain
2019Co-Authors: Parul Verma, Achim Kienle, Dietrich Flockerzi, Doraiswami RamkrishnaAbstract:Abstract Pain is a common sensation which inescapably arises due to injuries, as well as, various diseases and disorders. However, for the same intensity of disturbance arising due to the forgoing causes, the threshold for pain sensation and perception varies among individuals. Here, we present a computational approach using Bifurcation Theory to understand how the pain sensation threshold varies and how it can be controlled, the threshold being quantified by the electrical activity of a pain-sensing neuron. To this end, we explored the Bifurcations arising from a mathematical model representing the dynamics of this neuron. Our findings indicate that the Bifurcation points are sensitive to specific model parameters. This demonstrates that the pain sensation threshold can change as shown in experimental studies found in literature. Further investigation using our Bifurcation approach coupled with experimental studies can facilitate rigorous understanding of pain response mechanism and provide strategies to control the pain sensation threshold.