The constant power loads (CPLs) threaten the stability of the DC microgrids (DCMGs) due to the negative impedance characteristic, which leads to voltage oscillations or a blackout in the DCMG. This paper proposes a new droop control for paralleled DC–DC converters feeding CPLs in the DCMG to improve the stability of the whole system. In this approach, an optimization droop gain is conducted for each converter to guarantee current sharing among paralleled converters. Furthermore, an intelligent single input interval type-II fuzzy logic controller (SIT2-FLC) is developed in a model-free framework to further ameliorate the current sharing and voltage regulation in the DCMG when supplying the CPLs. An extended-state observer (ESO) is adopted in the model-free controller to estimate the unmodelled dynamics in the DC-DC converters feeding CPLs. Since an estimation observer error often appears in the presence of uncertainties, a sliding mode control (SMC) technique is proposed to remove the estimation error and enhance the system stability. The studied DCMG is developed in hardware-in-the-loop (HIL) with various levels of CPL's power to verify the applicability of the suggested mode-free intelligent controller.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    An intelligent sliding mode control for stabilization of parallel converters feeding CPLs in DC-microgrid



    Erscheinungsdatum :

    2022-11-01


    Anmerkungen:

    Mosayebi , M , Gheisarnejad Chirani , M & Khooban , M H 2022 , ' An intelligent sliding mode control for stabilization of parallel converters feeding CPLs in DC-microgrid ' , IET Power Electronics , vol. 15 , no. 14 , pp. 1596-1606 . https://doi.org/10.1049/pel2.12329



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629




    Feasibility Investigation on Potential Working Fluids for Electrohydrodynamically-Assisted CPLs

    Mo, B. / Ohadi, M. M. / Dessiatoun, S. V. et al. | British Library Conference Proceedings | 2000


    Intelligent Power Sharing of DC Isolated Microgrid Based on Fuzzy Sliding Mode Droop Control

    Mi, Y. / Zhang, H. / Fu, Y. et al. | BASE | 2019

    Freier Zugriff

    Robust Stabilization of Parallel Inverters-Based Microgrid: Droop Control Strategy

    Alfergani, Asma / Buaossa, Nagi / Tahir, Ahmed et al. | IEEE | 2021


    A novel control strategy for parallel-connected converters in low voltage microgrid

    Zhang, Guowei / Jin, Zhihui / Li, Ningning et al. | IEEE | 2014