Essays about: "Single-line to ground faults"

Found 4 essays containing the words Single-line to ground faults.

  1. 1. Detection and location of HVDC commutation faults from PMU data

    University essay from Lunds universitet/Industriell elektroteknik och automation

    Author : Alejandro Belinchon Calderon; [2018]
    Keywords : HVDC-links; HVDC converters; Commutation failures; Phasor measurement units PMUs ; Electric power systems; Wide Area Measurement systems WAMS ; Standard IEEEC 37.118; Single-line to ground faults; Three-Phase faults; Fault detection and location; Nordic 32; DigSilent-PowerFactory; PSCAD; MATLAB-Simulink; Symmetrical components.; Technology and Engineering;

    Abstract : Commutation Failures in LCC HVDC converters is a topic that is normally addressed from the component perspective, looking at converters’ internal signals. How these commutation failures affect the outer AC network is not deeply understood yet. READ MORE

  3. 2. Grounding of distrubution grids : High impedancegrounding compared to solid grounding with Fault Current Limiter

    University essay from

    Author : Maria Kättström; [2017]
    Keywords : ;

    Abstract : Today cables replace overhead lines in distribution systems and cause higher system capacitance and higher capacative fault currents. This fault current, in the fault location, is limited by a Petersén coil and a resistance in parallel when a fault occurs in so called “high impedance grounded systems” which are commonly used in Europe. READ MORE

  4. 3. 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

  5. 4. GIC immune transformers - An evaluation of their GIC elimination and fault behaviour

    University essay from Lunds universitet/Industriell elektroteknik och automation

    Author : Kajsa Eriksson Rosenkvist; [2015]
    Keywords : GIC Geomagnetically Induced Currents Transformers Un-symmetrical faults; Technology and Engineering;

    Abstract : Geomagnetically Induced Currents (GICs) arise from fluctuations in Earths magnetic field and can reach alarmingly high levels and cause malfunctions or blackouts in the power grids in which they occur. AF Klercker Alaküla and Lindahl invented a patented GIC immune transformer which eliminates the effects of GICs, though it is not known how this implementation will affect the transformers behavior during un-symmetrical faults. READ MORE