Sökning: "commutation failure prevention"

Hittade 1 uppsats innehållade orden commutation failure prevention.

  1. 1. Improvement of Commutation Failure Prediction in HVDC Classic Links

    Kandidat-uppsats, Högskolan Väst/Avd för elektro- och automationsteknik

    Författare :Johanna Ivarsson; [2011]
    Nyckelord :HVDC; commutation; failure prediction; failure prevention; classic; inverter; algorithm concept; PSCAD; simulations; converter; phase shifts; extinction angle;

    Sammanfattning : In this thesis, an evaluation of the existing control system for ABB: s HVDC Classic Links is performed in order to investigate whether a possible improvement to commutation failure prediction is possible and to be recommended. The thesis starts with a theoretical approach to the complexity of consequences of increasing the extinction angle (γ) in order to prevent commutation failure in inverter operation, which is later confirmed through using the simulation software PSCAD to evaluate coherence between simulation results and theory. LÄS MER