Essays about: "hvdc in abb"

Showing result 11 - 14 of 14 essays containing the words hvdc in abb.

  1. 11. Synchronized Phasor Measurement Units : Implementation of PMU Algorithm on HVDC Control Platform

    University essay from KTH/Industriella informations- och styrsystem

    Author : Samarth Deo; [2013]
    Keywords : PMU; PDC; HVDC; WAMS; GPS; IEEE C37.118.2005;

    Abstract : Power Systems most often operate in the margins of stability limits. With power grids becoming even more automated now, Phasor Measurement Units (PMU’s) and Phasor Data Concentrators (PDC’s) become essential for real-time control of the system. READ MORE

  3. 12. Offshore Wind Park Connection to an HVDC Platform, without using an AC Collector Platform

    University essay from Institutionen för kultur, energi och miljö

    Author : Haseeb Ahmad; [2012]
    Keywords : ;

    Abstract : This thesis investigates the comparison between two different alternating current topologies of an offshore wind farms connection to an offshore high voltage direct current (HVDC) converter platform. The offshore high voltage direct current converter platform converts alternating current into direct current. READ MORE

  4. 13. Improvement of Commutation Failure Prediction in HVDC Classic Links

    University essay from Högskolan Väst/Avd för elektro- och automationsteknik

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

    Abstract : 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. READ MORE

  5. 14. Investigation of alternative current measurements in high-voltage applications

    University essay from Institutionen för teknik och naturvetenskap

    Author : Jens Holmgren; [2007]
    Keywords : HVDC; measure; Hall-Effect; Magnetoreistanse; magnetic field; current; mätning; ström;

    Abstract : ABB:s MACH2 system uses a number of currents to ignite thyristors for AC/DC-trassfformation and they are measured for control and protection. The measurement methods used today has major drawbacks. READ MORE