Essays about: "transformer protection thesis"

Showing result 6 - 10 of 10 essays containing the words transformer protection thesis.

  1. 6. A novel approach to detect CT saturation using standalone CT measurements

    University essay from KTH/Elkraftteknik

    Author : Salman Uddin; [2017]
    Keywords : CT; CT saturation; Power system protection; Strömtransformator; Strömtransformatormattning; Reläskydd i kraftsystem;

    Abstract : The requirement for reliability and security in power system is increasing every passingday with the increase in complexity of the power system. To ensure highest level ofreliability, protection relays have to receive correct measurements. One of the most importantmeasurement that is needed by a relay as an input is current. READ MORE

  3. 7. Fault Location and Classification for Transmission Line Based on Wavelet Transform

    University essay from KTH/Skolan för elektro- och systemteknik (EES)

    Author : Qiuhong Wang; [2016]
    Keywords : Traveling wave; fault location; fault classification; wavelet transform; ATP EMTP.; Vågrörelse; fellokalisering; felklassificering; wavelet transformation; ATP EMTP;

    Abstract : With the rapid development of power systems, locating and classifying faults is critical to the continuity and reliability of the transmission system. In this thesis, a traveling-wave based technique for fault location and classification on high voltage and extremely high-voltage transmission lines is proposed. READ MORE

  4. 8. Interface Between Process Equipment And Process Bus for Light Weight Testing Of Protection Functions

    University essay from KTH/Industriella informations- och styrsystem

    Author : Zeeshan Ali Khurram; [2012]
    Keywords : ;

    Abstract : The technological advancements in the substation automation give rise to many new challenges for the engineers. The IEC 61850 standard de nes the most advanced techniques towards the digital substation development. It describes the communication mappings for the substation automation of both conventional and digital substations. READ MORE

  5. 9. Fault Impact Mitigation in Grid Connected Converters

    University essay from KTH/Elektrisk energiomvandling

    Author : Joakim Odnegård; [2012]
    Keywords : AC DC Converter; Grid Connected Converter; Fault Impact Mitigation; Converter Bus Fault; DC Fault; Fast Earthing Switch;

    Abstract : The present thesis deals with fault impact mitigation in grid connected converters used for High Voltage Direct Current transmission. Certain critical fault cases require additional obstructing protection actions to ease the impact on the converter valves. DC sided faults drives high fault currents through the converters. READ MORE

  6. 10. IEC 61850-9-2 Process Bus Communication Interface for Light Weight Merging Unit Testing Environment

    University essay from KTH/Industriella informations- och styrsystem

    Author : Pengcheng Zhao; [2012]
    Keywords : ;

    Abstract : IEC 61850 is an international standard for communication networks for substation [1]. As a part of the IEC 61850 series, IEC 61850 Part 9-2 was introduced in 2004 and updated to a stable version in 2011 [2]. Part 9-2 de nes the specfic communication service mapping for the transmission of sampled values from process equipment [3]. READ MORE