Essays about: "short circuit forces"

Showing result 1 - 5 of 6 essays containing the words short circuit forces.

  1. 1. Characterizing coil windings noise due to compressive fault currents : A study to determine if there is a characteristic noise from transformer windings due to fault currents

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Simon Lundgren; [2022]
    Keywords : Transformer windings; short circuit forces; current pulses; microphone; Comsol Multiphysics; FFT; Transformator lindningar; strömpulser; mikrofon; kortslutingskrafter; Comsol Multiphysics; FFT;

    Abstract : Transformers are essential for modern power distribution system. They are efficient and enable the voltages to be transformed up for transportation of electricity and back down for consumer use. The reliability of the transformer is affected by faults and fatigue of the copper. READ MORE

  3. 2. Finite element modelling of LV transformer winding to simulate dynamic events occurring under short circuit : In Ansys Mechanical

    University essay from Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Author : Madhu Venkata Sri Prudhvi Bikkina; [2020]
    Keywords : Ansys Mechanical; LV winding; Power Transformer; Short-circuit; Spiraling; Torsional Mode Shapes;

    Abstract : The ability to withstand a short circuit is the most essential feature of a power transformer. The most important reason to design short-circuits proof transformers is to ensure the reliability of the power grid (avoiding black outs etc.) and safety (fire and explosion in case of failure). READ MORE

  4. 3. A micro-CT investigation of density changes in pressboard due to compression

    University essay from Uppsala universitet/Tillämpad mekanik

    Author : Johan Stjärnesund; [2018]
    Keywords : Micro computed tomography; μCT; pressboard; density; densification;

    Abstract : Pressboard, a high-density cellulose-based product, is used both as load bearing structures and dielectric insulation in oil-filled power transformers. During transformer operation, mechanical forces and vibrations are applied on the material. READ MORE

  5. 4. Dynamics of an ultra-fast Thomson actuated HVDC breaker

    University essay from KTH/Maskinkonstruktion (Inst.)

    Author : Miguel Álvarez Sánchez; [2017]
    Keywords : HVDC; Ultra-fast Circuit Breaker; Thomson coil actuator; HVDC; ultra-snabb strömbrytare; Thomson-spole manöverdon;

    Abstract : High Voltage Direct Current (HVDC) is a rapidly growing form of power transmission that offers advantages with respect to conventional AC networks. One of the key elements that will allow the generalization of the HVDC grids is the Circuit Breaker (CB), which has to interrupt high DC currents in extremely short times. READ MORE

  6. 5. Coupled Dynamic 3D Simulation of Short Circuit Forces

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : PRITESH DULABHAI HADIYA; [2013]
    Keywords : Two dimensional axisymmetric; Three dimensional model; Comsol Multiphysics; Transformer short circuit.;

    Abstract : The purpose of this work is to find the effect of short circuit current on displacement inside the transformer’s winding. In this work two different winding has been investigated by creating 2D and 3D simulation models of them. In order to solve the problem various assumptions/simplification has been taken and verified. READ MORE