Essays about: "Partiella urladdningar"

Found 5 essays containing the words Partiella urladdningar.

  1. 1. Monitoring of Partial Discharges on Cable Terminations : An experimental approach to evaluate non-conventional online PD measurement techniques

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

    Author : Tony Sibo; [2023]
    Keywords : Monitoring; Partial discharges; Medium-voltage cable terminations; Sensor performance; Reliability evaluation; Infrared camera IR-camera ; Ultrasonic emission sensor AE-sensor ; Temperature and relative humidity sensor TRH-sensor ; High frequency current transformer HFCT ; Transient earth voltage antenna TEV-antenna ; Conventional VS non-conventional PD measurement techniques; Övervakning; Partiella urladdningar; Mellanspänningskabelslut; Evaluering av sensorprestanda; Utvärdering av systemets tillförlitlighet; Infraröd kamera; Ultraljudssensor; Temperatur- och relativ fuktighetssensor; Högfrekvent strömtransformator; Transient jordspänningsantenn; Konventionella vs icke-konventionella mättekniker;

    Abstract : The transmission of electric power over long distances has historically posed challenges. However, the advent of high-voltage engineering has not only addressed distance barriers and power losses in electricity transmission and distribution, but it has also significantly improved the efficiency and transmission capacity of power grids. READ MORE

  3. 2. Predicting Top-Oil-Temperature in Power Transformers with Light Gradient Boosting Machine

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

    Author : Victor Löfgren; [2022]
    Keywords : ;

    Abstract : Online monitoring of mineral-oil-immersed transformer variables provide capabilities such as failure avoidance, optimization of load capacity and maintenance as well as extending the remaining life expectancy. A central role is played by the Top-Oil-Temperature which in its own is an indicator of harmful events or transformer states. READ MORE

  4. 3. Insulation diagnostics of stator bars

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

    Author : Alexandra Garðarsdóttir; [2022]
    Keywords : Electrical insulation system; Stator bars; Insulation testing; Rotating machines; Partial discharges; Acoustic detection; Dielectric response analysis; Break-down test; Tap test; Elektriskt isoleringssystem; Statorstavar; Isolationsprovning; Roterande maskiner; Partiell urladdning; Akustisk detektering; Dielektrisk responsanalys; Nedbrytningstest; Taptest;

    Abstract : Insulation in rotating machines is a common cause for failure. Therefore, research in the area is large and is important to further increase the knowledge of the phenomena related to insulation degradation. READ MORE

  5. 4. The Effect of Partial Discharge Aging on the Dielectric Response of Polymers

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : David Bergman; [2014]
    Keywords : ;

    Abstract : This work investigated the effect of partial discharges (PD) on the complex permittivity of PVC, PC, PTFE, PE and PA6. The material samples were subjected to prolonged PD activity and the complex permittivity of the material was measured by dielectric spectroscopy (DS) before and after the sample was aged. READ MORE

  6. 5. On simulation of surface discharges at variable voltage frequency

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : Nadejda Jäverberg; [2007]
    Keywords : partial surface discharge; modelling; capacitive-resistive network;

    Abstract : Isolationsdiagnostik är ett redskap som är av stor betydelse för underhållsoptimering av elektriska anläggningar. Ett av de möjliga mått på isolationsförsämring som kan användas i diagnosticeringssyfte är partiella urladdningar. READ MORE