Blar i Publikasjoner fra CRIStin - SINTEF Energi på tidsskrift "IEEE transactions on dielectrics and electrical insulation"
Viser treff 1-14 av 14
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A novel bench size model coalescer: Dehydration efficiency of AC fields on water-in-crude-oil emulsions
(Journal article; Peer reviewed, 2016)We describe herein the design of a small AC electrostatic model coalescer for investigating coalescence efficiency of water in oil emulsions. The function of the model coalescer is tested on emulsions with different water ... -
An Engineering Approach to Computational Prediction of Breakdown in Air With Surface Charging Effects
(Journal article; Peer reviewed, 2017)This paper presents a dielectric simulation approach for predicting withstand voltage of air insulated power devices. The paper gives an overview of typical evaluation procedures for the basic discharge stages including ... -
Breakdown Mechanisms of Rod-Plane Air Gaps with a Dielectric Barrier Subject to Lightning Impulse Stress
(Journal article; Peer reviewed, 2018)Breakdown Mechanisms of Rod-Plane Air Gaps with a Dielectric Barrier Subject to Lightning Impulse Stress -
Cavities in Mass-Impregnated HVDC Subsea Cables Studied by AC Partial Discharge Measurements
(Journal article; Peer reviewed, 2019)Partial discharge measurements have been used for studying shrinkage voids in the insulation of mass-impregnated high voltage DC subsea power cables. Three 4.5-m long cable samples were subjected to ac partial discharge ... -
Compatibility of liquid and solid insulation materials for high voltage subsea connectors
(Journal article; Peer reviewed, 2019)The main objective of this study is to identify reliable insulation materials and systems for novel AC and DC subsea power connectors for oil and gas exploitation. A combined solid-liquid insulation system might be radically ... -
Effect of Elastic Modulus on the Tangential AC Breakdown Strength of Polymer Interfaces
(Journal article; Peer reviewed, 2019)Solid-solid interfaces between insulating materials dictate the long-term electrical properties of the complete insulation system. This paper presents theoretical and experimental investigations aiming to address the impact ... -
Effect of Filling Pressure on Post-Arc Gap Recovery of N2
(Peer reviewed; Journal article, 2020)Experimental investigation of the effect of filling pressure on the post-arc dielectric recovery characteristics of nitrogen is reported in this paper. A half-cycle arc current duration of 540 μs followed by a 10 kV pulse ... -
Effect of Material Elasticity on the Longitudinal AC Breakdown Strength of Solid-Solid Interfaces
(Journal article; Peer reviewed, 2019) -
Frequency Dependence of the Electric Field Grading of End-Winding of Generator Bars
(Peer reviewed; Journal article, 2022)To reduce the electric field stresses in the end-winding in hydropower generator bars, a field dependent grading tape is applied in the transition zone from outer corona protection to bare insulation. The design is typically ... -
Influence of fast rise voltage and pressure on partial discharges in liquid embedded power electronics
(Peer reviewed; Journal article, 2015) -
Internal pressures and pressure gradients in mass-impregnated HVDC cables during current cycling
(Peer reviewed; Journal article, 2020)The internal pressures in the insulation of two 5-m long pieces of a state-of-the art mass-impregnated non-draining subsea cable have been measured under load current cycling at ambient temperatures ranging from 3 to 37 ... -
Modelling of Internal Pressure Dynamics in Mass-Impregnated Non-Draining HVDC Cables
(Peer reviewed; Journal article, 2022)Changing the current loading of mass-impregnated non-draining power cables causes the pressure in the insulation to vary over a wide range. It is generally recognized that under certain conditions—typically after a large ... -
Pressure-Dependent Propagation of Streamers under Step Voltage in a long Point-Plane Gap in Transformer Oil
(Peer reviewed; Journal article, 2020)The effect of pressure on positive and negative streamer propagation in a mineral transformer oil is studied in an 80 mm point-plane gap under step voltage. Increased pressure causes reduced stopping length for non-breakdown ... -
Streamer and surface charge dynamics in non-uniform air gaps with a dielectric barrier
(Journal article; Peer reviewed, 2019)Streamer behaviour near dielectric surfaces is an important characteristic of air-solid electrical insulation systems. Accurate predictions are important for dielectric design, but dynamic aspects such as surface charging ...