Essays about: "Unbalance"

Showing result 21 - 25 of 46 essays containing the word Unbalance.

  1. 21. 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. 22. Power Quality Analysis at Falu Hospital

    University essay from

    Author : Jennie Aldenlid; [2018]
    Keywords : ;

    Abstract : This is a master thesis performed on behalf of ABB Power Quality Center, aiming to investigate the power quality at Falu hospital. Hospitals can suffer from bad power quality both in the aspect of malfunctioning equipment, and as they can provide disturbances to the power grid. READ MORE

  4. 23. Analysis of harmonic cross-modulation in HVDC line-commutated converters for practical design purposes

    University essay from Högskolan Väst/Avdelningen för Industriell ekonomi, Elektro- och Maskinteknik

    Author : Casper Karlsson; [2018]
    Keywords : Power transmission; design; filters;

    Abstract : The use of HVDC has many benefits over HVAC for some specific power transmission purposes. However, two major problems with HVDC links are that the converters produce harmonics and consume reactive power. Electrical filters are used to compensate for this and are a major cost driver of HVDC links. READ MORE

  5. 24. Water Scarcity in Coastal Areas of Sweden : Assessment of water availability and reservoir sensitivity in Vindö, Värmdö municipality, based on climate change scenarios

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Josefine Sandberg; [2017]
    Keywords : ;

    Abstract : A groundwater assessment of north Vindö in Värmdö municipality has been conducted using a spatial analysis tool that is under development. Vindö is a coastal community characterized by surfaced-, or shallowly covered crystalline rock. READ MORE

  6. 25. What affects the tear strength of paperboard? : Consequences of unbalance in a designed experiment

    University essay from Karlstads universitet/Handelshögskolan

    Author : Niklas Forsberg; [2017]
    Keywords : Designed experiment; paperboard; statistical analysis; ANOVA; regression; unbalanced design; tear strength;

    Abstract : This essay covers a designed experiment on paperboard where the quality under study is tear strength alongside and across. The objective is to examine what consequences the loss of balance in a designed experiment has on the explanatory power of the proposed empirical model. READ MORE