The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform

Ioannis Lestas - One of the best experts on this subject based on the ideXlab platform.

  • primary frequency regulation with load side participation part i stability and optimality
    IEEE Transactions on Power Systems, 2017
    Co-Authors: Andreas Kasis, Eoin Devane, Chrysovalantis Spanias, Ioannis Lestas
    Abstract:

    We present a method to design distributed generation and demand Control schemes for primary frequency regulation in power networks that guarantee asymptotic stability and ensure fairness of allocation. We impose a passivity condition on net power supply variables and provide explicit steady-state conditions on a general class of generation and demand Control Dynamics that ensure convergence of solutions to equilibria that solve an appropriately constructed network optimization problem. We also show that the inclusion of Controllable demand results in a drop in steady-state frequency deviations. We discuss how various classes of Dynamics used in recent studies fit within our framework and show that this allows for less conservative stability and optimality conditions. We illustrate our results with simulations on the IEEE 68-bus transmission system and the IEEE 37-bus distribution system with static and dynamic demand response schemes.

  • primary frequency regulation with load side participation part ii beyond passivity approaches
    IEEE Transactions on Power Systems, 2017
    Co-Authors: Eoin Devane, Andreas Kasis, Marina Antoniou, Ioannis Lestas
    Abstract:

    We consider the problem of distributed generation and demand Control for primary frequency regulation in power networks, such that stability and optimality of the power allocation can be guaranteed. It was shown in Part I of this work, that by imposing an input strict passivity condition on the net supply Dynamics at each bus, combined with a decentralized condition on their steady-state behavior, convergence to optimality can be guaranteed for broad classes of generation and demand Control Dynamics in a general network. In this paper, we show that by taking into account additional local information, the input strict passivity condition can be relaxed to less restrictive decentralized conditions. These conditions extend the classes of generation and load Dynamics for which convergence to optimality can be guaranteed beyond the class of passive systems, thus, allowing to reduce the conservatism in the analysis and feedback design.

  • CDC - On the stability and optimality of primary frequency regulation with load-side participation
    2015 54th IEEE Conference on Decision and Control (CDC), 2015
    Co-Authors: Andreas Kasis, Eoin Devane, Ioannis Lestas
    Abstract:

    We present a method to design distributed generation and demand Control schemes for primary frequency regulation in power networks that guarantee asymptotic stability and ensure fairness of allocation. We impose a passivity condition on net power supply variables and provide explicit steady state conditions on a general class of generation and demand Control Dynamics that ensure convergence of solutions to equilibria that solve an appropriately constructed network optimization problem. We discuss how various classes of Dynamics used in recent studies fit within our framework and show that, in some cases, this allows for less conservative stability and optimality conditions. We illustrate our results with simulations on the IEEE 68 bus system and observe that both static and dynamic demand response schemes that fit within our framework offer improved transient and steady state behavior compared with Control of generation alone.

Andreas Kasis - One of the best experts on this subject based on the ideXlab platform.

  • primary frequency regulation with load side participation part i stability and optimality
    IEEE Transactions on Power Systems, 2017
    Co-Authors: Andreas Kasis, Eoin Devane, Chrysovalantis Spanias, Ioannis Lestas
    Abstract:

    We present a method to design distributed generation and demand Control schemes for primary frequency regulation in power networks that guarantee asymptotic stability and ensure fairness of allocation. We impose a passivity condition on net power supply variables and provide explicit steady-state conditions on a general class of generation and demand Control Dynamics that ensure convergence of solutions to equilibria that solve an appropriately constructed network optimization problem. We also show that the inclusion of Controllable demand results in a drop in steady-state frequency deviations. We discuss how various classes of Dynamics used in recent studies fit within our framework and show that this allows for less conservative stability and optimality conditions. We illustrate our results with simulations on the IEEE 68-bus transmission system and the IEEE 37-bus distribution system with static and dynamic demand response schemes.

  • primary frequency regulation with load side participation part ii beyond passivity approaches
    IEEE Transactions on Power Systems, 2017
    Co-Authors: Eoin Devane, Andreas Kasis, Marina Antoniou, Ioannis Lestas
    Abstract:

    We consider the problem of distributed generation and demand Control for primary frequency regulation in power networks, such that stability and optimality of the power allocation can be guaranteed. It was shown in Part I of this work, that by imposing an input strict passivity condition on the net supply Dynamics at each bus, combined with a decentralized condition on their steady-state behavior, convergence to optimality can be guaranteed for broad classes of generation and demand Control Dynamics in a general network. In this paper, we show that by taking into account additional local information, the input strict passivity condition can be relaxed to less restrictive decentralized conditions. These conditions extend the classes of generation and load Dynamics for which convergence to optimality can be guaranteed beyond the class of passive systems, thus, allowing to reduce the conservatism in the analysis and feedback design.

  • CDC - On the stability and optimality of primary frequency regulation with load-side participation
    2015 54th IEEE Conference on Decision and Control (CDC), 2015
    Co-Authors: Andreas Kasis, Eoin Devane, Ioannis Lestas
    Abstract:

    We present a method to design distributed generation and demand Control schemes for primary frequency regulation in power networks that guarantee asymptotic stability and ensure fairness of allocation. We impose a passivity condition on net power supply variables and provide explicit steady state conditions on a general class of generation and demand Control Dynamics that ensure convergence of solutions to equilibria that solve an appropriately constructed network optimization problem. We discuss how various classes of Dynamics used in recent studies fit within our framework and show that, in some cases, this allows for less conservative stability and optimality conditions. We illustrate our results with simulations on the IEEE 68 bus system and observe that both static and dynamic demand response schemes that fit within our framework offer improved transient and steady state behavior compared with Control of generation alone.

Eoin Devane - One of the best experts on this subject based on the ideXlab platform.

  • primary frequency regulation with load side participation part i stability and optimality
    IEEE Transactions on Power Systems, 2017
    Co-Authors: Andreas Kasis, Eoin Devane, Chrysovalantis Spanias, Ioannis Lestas
    Abstract:

    We present a method to design distributed generation and demand Control schemes for primary frequency regulation in power networks that guarantee asymptotic stability and ensure fairness of allocation. We impose a passivity condition on net power supply variables and provide explicit steady-state conditions on a general class of generation and demand Control Dynamics that ensure convergence of solutions to equilibria that solve an appropriately constructed network optimization problem. We also show that the inclusion of Controllable demand results in a drop in steady-state frequency deviations. We discuss how various classes of Dynamics used in recent studies fit within our framework and show that this allows for less conservative stability and optimality conditions. We illustrate our results with simulations on the IEEE 68-bus transmission system and the IEEE 37-bus distribution system with static and dynamic demand response schemes.

  • primary frequency regulation with load side participation part ii beyond passivity approaches
    IEEE Transactions on Power Systems, 2017
    Co-Authors: Eoin Devane, Andreas Kasis, Marina Antoniou, Ioannis Lestas
    Abstract:

    We consider the problem of distributed generation and demand Control for primary frequency regulation in power networks, such that stability and optimality of the power allocation can be guaranteed. It was shown in Part I of this work, that by imposing an input strict passivity condition on the net supply Dynamics at each bus, combined with a decentralized condition on their steady-state behavior, convergence to optimality can be guaranteed for broad classes of generation and demand Control Dynamics in a general network. In this paper, we show that by taking into account additional local information, the input strict passivity condition can be relaxed to less restrictive decentralized conditions. These conditions extend the classes of generation and load Dynamics for which convergence to optimality can be guaranteed beyond the class of passive systems, thus, allowing to reduce the conservatism in the analysis and feedback design.

  • CDC - On the stability and optimality of primary frequency regulation with load-side participation
    2015 54th IEEE Conference on Decision and Control (CDC), 2015
    Co-Authors: Andreas Kasis, Eoin Devane, Ioannis Lestas
    Abstract:

    We present a method to design distributed generation and demand Control schemes for primary frequency regulation in power networks that guarantee asymptotic stability and ensure fairness of allocation. We impose a passivity condition on net power supply variables and provide explicit steady state conditions on a general class of generation and demand Control Dynamics that ensure convergence of solutions to equilibria that solve an appropriately constructed network optimization problem. We discuss how various classes of Dynamics used in recent studies fit within our framework and show that, in some cases, this allows for less conservative stability and optimality conditions. We illustrate our results with simulations on the IEEE 68 bus system and observe that both static and dynamic demand response schemes that fit within our framework offer improved transient and steady state behavior compared with Control of generation alone.

Davide Michieletto - One of the best experts on this subject based on the ideXlab platform.

  • threading induced dynamical transition in tadpole shaped polymers
    arXiv: Soft Condensed Matter, 2020
    Co-Authors: Angelo Rosa, Ja Smrek, Matthew S Turne, Davide Michieletto
    Abstract:

    The relationship between polymer topology and bulk rheology remains a key question in soft matter physics. Architecture-specific constraints (or threadings) are thought to Control the Dynamics of ring polymers in ring-linear blends, which thus affects the viscosity to range between that of the pure rings and a value larger, but still comparable to, that of the pure linear melt. Here we consider qualitatively different systems of linear and ring polymers, fused together in "chimeric" architectures. The simplest example of this family is a "tadpole"-shaped polymer - a single ring fused to the end of a single linear chain. We show that polymers with this architecture display a threading-induced dynamical transition that substantially slows chain relaxation. Our findings shed light on how threadings Control Dynamics and may inform design principles for chimeric polymers with topologically-tunable bulk rheological properties.

Chrysovalantis Spanias - One of the best experts on this subject based on the ideXlab platform.

  • primary frequency regulation with load side participation part i stability and optimality
    IEEE Transactions on Power Systems, 2017
    Co-Authors: Andreas Kasis, Eoin Devane, Chrysovalantis Spanias, Ioannis Lestas
    Abstract:

    We present a method to design distributed generation and demand Control schemes for primary frequency regulation in power networks that guarantee asymptotic stability and ensure fairness of allocation. We impose a passivity condition on net power supply variables and provide explicit steady-state conditions on a general class of generation and demand Control Dynamics that ensure convergence of solutions to equilibria that solve an appropriately constructed network optimization problem. We also show that the inclusion of Controllable demand results in a drop in steady-state frequency deviations. We discuss how various classes of Dynamics used in recent studies fit within our framework and show that this allows for less conservative stability and optimality conditions. We illustrate our results with simulations on the IEEE 68-bus transmission system and the IEEE 37-bus distribution system with static and dynamic demand response schemes.