Browsing NTNU Open by Author "Mauseth, Frank"
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A stochastic model for contact surfaces at polymer interfaces subjected to an electrical field
Kantar, Emre; Hvidsten, Sverre; Mauseth, Frank; Ildstad, Erling (Journal article; Peer reviewed, 2018)Morphology of the contact area between solid insulation materials ultimately determines the short- and long-term electrical properties of the complete insulation system. The main purpose of this paper is to propose a ... -
AC-tap i MgB2-superleder: Effekt av simulert slaglende
Lindau, Sandra Madeleine (Master thesis, 2013)Superconductive materials can conduct DC currents without energy losses when cooled down below their critical temperature. However, under AC conditions, energy losses appear in the superconductor. In 2001 the new and ... -
Aldring av PEX-isolasjon ved påtrykk av HVDC med overlagrede transienter
Amundsen, Martin (Master thesis, 2012)Produksjon av elektrisk kraft fra offshore vindturbiner vil bli en stor utfordring i nær fremtid. Forskningsrådet har i den forbindelse tildelt SINTEF et femårig forskningsprosjekt på HVAC og HVDC undervannskabler for ... -
Breakdown at Multiple Protrusions and Surface Roughness in SF6 and CO2 - A Study of the Enlargement Law
Feet, Odd Christian (Master thesis, 2018)Gas insulated components are important in the modern transmission system. The most common gas used in high pressure insulation is Sulphur Hexafluoride (SF6). SF6 has beenclassified as a greenhouse gas and a potential ... -
Breakdown in short rod-plane air gaps under positive lightning impulse stress
Hygen Meyer, Hans Kristian; Mauseth, Frank; Pedersen, Per Atle; Martine, Husøy (Journal article; Peer reviewed, 2017)Prediction of withstand voltages in air-insulated systems are made on the basis of empirical models that are not sufficiently accurate for complex geometries. Bet-ter understanding of the spatio temporal ... -
Breakdown Mechanisms of Rod-Plane Air Gaps with a Dielectric Barrier Subject to Lightning Impulse Stress
Meyer, Hans Kristian Hygen; Mauseth, Frank; Pedersen, Per Atle; Ekeberg, Jonas (Journal article; Peer reviewed, 2018)The complexity of gas-insulated substations makes it difficult to predict withstand voltages. Modeling interaction between dielectric surfaces and electrical discharges is a key challenge. In this study, 60 mm rod-plane ... -
Characterization of Insulation Materials for HVDC Subsea Connectors - Evaluation of Measurement Methods for Surface Conductivity
Jacobsen, Brynjar Aalberg (Master thesis, 2015)The focus of this work has been on characterization methods for the surface conductivity of insulation materials in HVDC subsea connectors. Having a proper characterization is important when selecting the most suited design ... -
Charge accumulation in rod-plane air gap with covered rod
Mauseth, Frank (Doktoravhandlinger ved NTNU, 1503-8181; 2006:239, Doctoral thesis, 2007)The focus of this work has been on hybrid insulation in inhomogeneous electric fields under lightning impulse voltage stress. The principal idea behind hybrid insulation is the intentional use of surface charges to ... -
Condition Assessment of Medium Voltage Cable Accessories - PD Measurements at Variable Frequencies
Einan, Gunnar Stokke (Master thesis, 2016)Diagnostic PD testing of medium voltage cables can be performed at very low frequencies (VLF, 0.1 Hz), to reduce capacitive currents. At 0.1 Hz the field distribution in the field grading materials is likely different from ... -
Condition Assessment of Medium Voltage Cable Joints - Dielectric Spectroscopy of field grading materials
Sanden, Mai-Linn (Master thesis, 2015)This thesis examines the electrical properties of a commonly used stress control tube for medium voltage heat-shrink joints using non-destructive methods in laboratory. The electrical properties of the tube were determined ... -
Condition Assessment of Medium Voltage Cable Joints - Dielectric Spectroscopy of Field Grading Materials
Abil, Biran (Master thesis, 2017)The electrical properties of a widely used stress control tube for medium voltage heat-shrink joints are examined in this master thesis by using non-destructive laboratory methods. They were determined by use of time domain ... -
Condition Assessment of Service Aged Medium Voltage Cable Joints During Load Cycling
Bjurholt, Ingeborg (Master thesis, 2018)In order to be able to take maximum advantage of the remaining lifetime of the components in the distribution network, utilities need to know the condition of the equipment as accurately as possible. When partial discharges ... -
Condition Assessment of Wind Farm Medium Voltage Cable Joints
Halvorson, Hans Lavoll (Master thesis, 2012)Rapid aging and failure in wind-farm collector systems has become an issue for grid owners. PD measurements of the cable systems can give good diagnostics, detect aging and pinpoint faults. Different PD measuring techniques ... -
Condition Monitoring of Subsea Connectors - Partial Discharge Detection Using a High Frequency Sensor
Myklatun, Jon Thore (Master thesis, 2014)This thesis discusses possible causes of failure and potential condition indicators that may be used to monitor the condition of the insulation system of a subsea connector. The main focus is to describe how high frequency ... -
Correlation Between Electroluminescence and Partial Discharges in Silicone Rubber Used for High Voltage AC Subsea Connectors
Midttveit, Øystein (Master thesis, 2018)Processing of oil and gas has been performed on topside installations close to the wells. In the future, wells will be further away from the infrastructure and more processing will be performed on the seabed. This will ... -
Degradering av flourpolymerer ved hjelp av partielle utladninger
Sæthre, Øystein (Master thesis, 2010)Prosjektet har blitt utført i samarbeid med SINTEF Energi AS. Hovedformålet med prosjektet har vært å sammenligne kryssbundet polyetylen (PEX) med perfluoroalkoxy (PFA) med hensyn på levetid i elektrisk sammenheng. I dag ... -
Development of Test Methods for a Combined DC Power and Fiber Optic Deep Water Subsea Cable - Effect of DC Pre-stress on AC Withstand Strength
Meyer, Hans Kristian Hygen (Master thesis, 2015)Repeatered fiber optic submarine cables require a very high reliability. The cables operate at a voltage of 10 kV DC to supply electrical power to the repeaters that are placed every 50-70 km along the cable to amplify the ... -
Dielectric barriers under lightning impulse stress: Breakdown and discharge-dielectric interaction in short non-uniform air gaps
Meyer, Hans Kristian Hygen (Doctoral theses at NTNU;2019:106, Doctoral thesis, 2019)Dielectric-air insulation systems can reduce the carbon footprint of medium voltage switchgear, as they can replace SF6-insulated systems. Such replacement is, however, not easy, as the devices are typically compact and ... -
Effect of Barriers in Air Insulated Rod-Plane Gaps
Jørstad, Jonathan S (Master thesis, 2012)The purpose of the experiments conducted in this Master's thesis is to predict and explain the change in breakdown voltage when insulating barriers are introduced in a rod-plane gap arrangement. The experiments have been ... -
Effect of SF6-alternative gas on the dielectric breakdown strength in load break switches
Helseth, Trygve (Master thesis, 2019)Det moderne kraftnettet inneholder stadig fler fornybare energikilder. Dette er svært gunstig for klimaavtrykket til samfunnets elektriske energiforbruk, men det gir også noen nye utfordringer. Overgangen til fornybare ...