In this paper we consider the problem of restoring the voltage for stand-alone inverter-based Microgrids despite the effects of the time-delays arising with the information exchange among the electrical busses. To guarantee that all Distributed Generators (DGs) reach in a finite-time and maintain the voltage set-point, as imposed by a virtual DG acting as a leader, we suggest a novel robust networked-based control protocol that is also able to counteract both the time-varying communication delays and natural fluctuations caused by the primary controllers. The finite-time stability of the whole Microgrid is analytically proven by exploiting Lyapunov-Krasovskii theory and finite-time stability mathematical tools. In so doing, delay-dependent stability conditions are derived as a set of Linear Matrix Inequalities (LMIs), whose solution allows the proper tuning of the control gains such that the control objective is achieved with required transient and steady-state performances. A thorough numerical analysis is carried out on the IEEE 14-bus test system. Simulation results corroborate the analytical derivation and reveal both the effectiveness and the robustness of the suggested controller in ensuring the voltage restoration in finite-time in spite of the effects of time-varying communication delays.

Distributed Robust Finite-Time Secondary Control for Stand-Alone Microgrids with Time-Varying Communication Delays / Andreotti, A.; Caiazzo, B.; Petrillo, A.; Santini, S.. - In: IEEE ACCESS. - ISSN 2169-3536. - 9:(2021), pp. 59548-59563. [10.1109/ACCESS.2021.3073779]

Distributed Robust Finite-Time Secondary Control for Stand-Alone Microgrids with Time-Varying Communication Delays

Andreotti A.;Caiazzo B.;Petrillo A.;Santini S.
2021

Abstract

In this paper we consider the problem of restoring the voltage for stand-alone inverter-based Microgrids despite the effects of the time-delays arising with the information exchange among the electrical busses. To guarantee that all Distributed Generators (DGs) reach in a finite-time and maintain the voltage set-point, as imposed by a virtual DG acting as a leader, we suggest a novel robust networked-based control protocol that is also able to counteract both the time-varying communication delays and natural fluctuations caused by the primary controllers. The finite-time stability of the whole Microgrid is analytically proven by exploiting Lyapunov-Krasovskii theory and finite-time stability mathematical tools. In so doing, delay-dependent stability conditions are derived as a set of Linear Matrix Inequalities (LMIs), whose solution allows the proper tuning of the control gains such that the control objective is achieved with required transient and steady-state performances. A thorough numerical analysis is carried out on the IEEE 14-bus test system. Simulation results corroborate the analytical derivation and reveal both the effectiveness and the robustness of the suggested controller in ensuring the voltage restoration in finite-time in spite of the effects of time-varying communication delays.
2021
Distributed Robust Finite-Time Secondary Control for Stand-Alone Microgrids with Time-Varying Communication Delays / Andreotti, A.; Caiazzo, B.; Petrillo, A.; Santini, S.. - In: IEEE ACCESS. - ISSN 2169-3536. - 9:(2021), pp. 59548-59563. [10.1109/ACCESS.2021.3073779]
Distributed Robust Finite-Time Secondary Control for Stand-Alone Microgrids with Time-Varying Communication Delays / Andreotti, A.; Caiazzo, B.; Petrillo, A.; Santini, S.. - In: IEEE ACCESS. - ISSN 2169-3536. - 9:(2021), pp. 59548-59563. [10.1109/ACCESS.2021.3073779]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/866424
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