Essays about: "Johan Jernberg"

Found 1 essay containing the words Johan Jernberg.

  1. 1. LCC Bipole with one station earthed via a large capacitor : Theory and simulations

    University essay from Mittuniversitetet/Avdelningen för elektronikkonstruktion

    Author : Johan Jernberg; [2016]
    Keywords : HVDC; LCC; Bipole; Metallic return; pole trip.;

    Abstract : If one of the two poles will trip for some reasons in a regular bipolar HVDC transmission without a return conductor, it is necessary to block the other pole temporarily during the transition to a monopolar operation with metallic return, this procedure will take 1-2 seconds and will affect the connected AC networks by extra disturbances. The object of this survey has been to answer the question if it is possible to have a balanced bipolar transmission without a return conductor and during a trip of one pole control it as an HVDC transmission with series connected converters by adding the by-pass switches and the logic for a series connected HVDC converter system which means that a shutdown of the transferred power during the transition phases is not necessary. READ MORE