With the wide application of doubly-fed induction generator (DFIG), accurate calculation and analysis of the short circuit currents of DFIG with crowbar protection has become very important key to realizing the low voltage ride through (LVRT) capability of DFIG and establishing the corresponding grid protection scheme. In view of this, a method to calculate the short circuit currents of DFIG with crowbar protection when different types of fault occur in the grid is proposed in this paper. First, the DFIG stator and rotor 2nd-order differential equations in the cases of grid symmetrical fault and asymmetrical fault are established respectively. And the short circuit current calculation model when crowbar resistance remains unchanged in the fault duration is obtained. On this basis, the short circuit current calculation model when crowbar resistance varies in the fault duration is derived. And then, the influence of crowbar resistance and DFIG rotor speed on the short circuit current calculation model is analyzed, including the variation pattern of flux eigenvalues with the crowbar resistance, and the variation feature of flux amplitude and phase angle with the rotor speed. Besides, the transient variation characteristics of different flux components are studied. Finally, time-domain simulation tests verify that the proposed calculation method is correct and applicable to different types of crowbar circuits in the market. Besides, the influence of crowbar resistance and DFIG rotor speed on the stator short circuit current peak, peak time and current frequency in different fault cases is revealed.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Short Circuit Current Calculation Method of Doubly-Fed Induction Generator with Crowbar Protection Based on Flux Transient Characteristics



    Erschienen in:

    Erscheinungsdatum :

    2017




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch



    Klassifikation :

    BKL:    53.33 / 53.33 Elektrische Maschinen und Antriebe



    Arrowhead Crowbar

    PIERCE MARK EDWARD NOEL / BRAUN ROBERT JOHN | Europäisches Patentamt | 2018

    Freier Zugriff

    CROWBAR

    HUANG KUO-CHAN | Europäisches Patentamt | 2019

    Freier Zugriff

    HYDRAULIC CROWBAR ASSEMBLY

    REEVE BRADLEY CRAIG | Europäisches Patentamt | 2025

    Freier Zugriff

    Novel crowbar structure

    ZHOU JUN / JIN QIU | Europäisches Patentamt | 2023

    Freier Zugriff

    Adjustable crowbar

    LAI YINGWU | Europäisches Patentamt | 2024

    Freier Zugriff