A New Method for Handling Lockout Constraints on Controlled TCL Aggregations

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    Abstract

    Thermal loads are recognized as a valuable source of flexibility in face of the increasing variability caused by the large shares of renewable production. Lockout constraints can significantly reduce the flexibility of thermostatically controlled loads (TCLs). We propose a novel way of modifying the loads’ lockout durations to achieve non-intrusive centralized control without relying on local computations and estimations. We derive analytical expressions for the flexibility reduction and validate them via simulations, which show that the proposed method describes the TCLs flexibility accurately. We further show that a simple stochastic centralized controller, which does not rely on local temperature measurements, outperforms the commonly used priority-stack controller in terms of system robustness against infeasible trajectories.
    Original languageEnglish
    Title of host publicationProceedings of 20th Power System Computation Conference
    Number of pages7
    PublisherIEEE
    Publication date2018
    ISBN (Print)9781910963104
    DOIs
    Publication statusPublished - 2018
    Event20th Power Systems Computation Conference - O’Brien Centre for Science at University College Dublin, Dublin, Ireland
    Duration: 11 Jun 201815 Jun 2018
    Conference number: 20
    http://www.pscc2018.net/index.html

    Conference

    Conference20th Power Systems Computation Conference
    Number20
    LocationO’Brien Centre for Science at University College Dublin
    Country/TerritoryIreland
    CityDublin
    Period11/06/201815/06/2018
    Internet address

    Keywords

    • Aggregation
    • Lockout constraints
    • Stochastic controller
    • Thermal battery model
    • Thermostatically controlled loads

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