Essays about: "Lindningskopplare"

Showing result 1 - 5 of 6 essays containing the word Lindningskopplare.

  1. 1. Centralised MPC for Long-term Voltage Stability Control of Power System

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

    Author : Johan Hallberg; [2023]
    Keywords : Voltage stability; Model predictive control; Tap-changing transformer; Capacitor bank; Spänningsstabilitet; Model prediktiv reglering; Lindningskopplare; Kondensatorbank;

    Abstract : In a power system it is important to keep voltages at specific levels at network buses. Deviations from that can lead to reduced efficiency of transferred power or, in more severe cases, widespread power outages affecting large parts of society. There exists a variety of power system devices that have the ability to regulate the voltage levels. READ MORE

  3. 2. Design changes to simplify maintenance and condition assessment on a tap changer

    University essay from Jönköping University/JTH, Industriell produktutveckling, produktion och design

    Author : Arvid Fermér; Jakob Modling; [2023]
    Keywords : Power transformer; Chemical degradation; Electrical insulation; Tap changer; Insulation Electrical; Transformer insulation; Insulating oil; Insulation condition assessment; Transformer; Power grids; Power distribution; Oil filled transformer; Transformer oil;

    Abstract : This master thesis investigates a redesign for a maintenance tube, used for both sampling and draining transformer oil from a tap changer compartment. With the current design, one can do one or the other of sampling and draining. READ MORE

  4. 3. Dielectrics calculation of on-load tap-changer VUCL

    University essay from KTH/Hållbar produktionsutveckling (ML)

    Author : Seywan Karimi; [2021]
    Keywords : Dielectrics; tap-changer; transformer; lightning impulse levels LI ; system voltage; direct current; resistor; and epoxy material; Dielektriska; lindnings kopplar; transformator; blixtimpuls nivåer LI ; systemspänning; likström; motstånds; epoximateria;

    Abstract : This is a bachelor's thesis in Mechanical engineering. The main topic of the thesis is the electrical calculation of the tap changer's shield. Although there are many kinds of tap-changers, this study focuses on VUCL models. The theoretical background of the thesis is that the new shield is suitable and useable in all VUCL models. READ MORE

  5. 4. Influence of structural and materials properties on the flexural strength of laminated high-density cellulose fiberboards

    University essay from KTH/Hållfasthetslära

    Author : Ola Serck; [2021]
    Keywords : ;

    Abstract : Laminated pressboard is a structural electrical insulation material used in power transformers. Typical applications are areas in the power transformers where high mechanical forces are present such as pressrings or winding tables and cleats which support the electrical cables connecting the transformer windings to tap-changes and bushings. READ MORE

  6. 5. Grease-oil compatibility in tribological applications - supergrease

    University essay from Lunds universitet/Centrum för analys och syntes

    Author : Anna Von Krusenstierna; [2016]
    Keywords : tap-changer; lindingskopplare; fett; grease; transformer oil; grease-oil compatibility; materials chemistry; materialkemi; Technology and Engineering; Chemistry;

    Abstract : A common reason to malfunctioning of tap-changers is wear of tribological contacts. In order to reduce wear, it would be desirable to lubricate the contacts. Since the tap-changer is working in transformer oil, it is necessary that whatever lubricant is added is compatible with transformer oil. READ MORE