Øystein Hestad

Professor in high voltage technology

Research Expertise

Dielectric properties of liquids and solids. Degradation mechanisms
space charge accumulaiton
HVDC
etc.

Publications

Field dependence on the molecular ionization potential and excitation energies compared to conductivity models for insulation materials at high electric fields
Journal of Applied Physics
2011
Investigation of the role of viscosity on electrocoalescence of water droplets in oil
Separation and Purification Technology
2006
Self-healing high voltage electrical insulation materials
2014 IEEE Electrical Insulation Conference (EIC)
2014
Electrical conductivity of medium voltage XLPE insulated cables
2012 IEEE International Symposium on Electrical Insulation
2012
Conductivity and permittivity of midel 7131: effect of temperature, moisture content, hydrostatic pressure and electric field
IEEE Transactions on Dielectrics and Electrical Insulation
2016
High frequency dielectric response of paper/oil insulation
2008 IEEE International Conference on Dielectric Liquids
2008
Dielectric Response of Oil-impregnated Cellulose from 0.1 mHz to 3 MHz
IEEE International Conference on Dielectric Liquids, 2005. ICDL 2005.
Pre-breakdown phenomena in hydrocarbon liquids in a point-plane gap under step voltage. Part 2: behaviour under negative polarity and comparison with positive polarity
Journal of Physics Communications
2020
New experimental system for the study of the effect of temperature and liquid to solid transition on streamers in dielectric liquids: application to cyclohexane
IEEE Transactions on Dielectrics and Electrical Insulation
2010
N-tridecane as a model system for polyethylene: comparison of pre-breakdown phenomena in liquid and solid phase stressed by a fast transient
IEEE Transactions on Dielectrics and Electrical Insulation
2011
Streamer initiation in cyclohexane, midel 7131 and nytro 10X
IEEE International Conference on Dielectric Liquids, 2005. ICDL 2005.
Effects of N,N-dimethylaniline and trichloroethene on prebreakdown phenomena in liquid and solid N-tridecane
IEEE Transactions on Dielectrics and Electrical Insulation
2011
Streamer injection and growth under impulse voltage: A comparison of Cyclohexane, Midel 7131 and Nytro 10X
The 17th Annual Meeting of the IEEE Lasers and Electro-Optics Society, 2004. LEOS 2004.
Numerical simulation of positive streamer propagation in cyclohexane
2014 IEEE 18th International Conference on Dielectric Liquids (ICDL)
2014
Prebreakdown Phenomena in Insulating Gas Mixtures under Very Fast Transients
Conference Record of the 2008 IEEE International Symposium on Electrical Insulation
2008
Condensation of Water Vapour in XLPE Insulation at Different Cooling Rates and Pressures
Conference Record of the 2006 IEEE International Symposium on Electrical Insulation
Photoionization model for the transition to fast mode streamers in dielectric liquids
2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)
2016
Field Dependent Currents in n-Tridecane
2022 IEEE 21st International Conference on Dielectric Liquids (ICDL)
2022
Modeling of Internal Pressure Dynamics in Mass-Impregnated Nondraining HVDC Cables
IEEE Transactions on Dielectrics and Electrical Insulation
2022
Thermal decomposition of cyclohexane by Kinetic Monte Carlo simulations and its relevance to streamer formation
2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)
2016
The effect of temperature cycling on mechanical and electrical properties of syndiotactic polypropylene
2016 IEEE International Conference on Dielectrics (ICD)
2016
Modeling the transition to fast mode streamers in dielectric liquids
2017 IEEE 19th International Conference on Dielectric Liquids (ICDL)
2017
Conduction and Electric Fields in Dielectric Liquids in Needle-to-Plane Gaps
IEEE Transactions on Dielectrics and Electrical Insulation
2024
Review of Water Treeing in Polymeric Insulated Cables
Proceedings of the Nordic Insulation Symposium
2022
Field and temperature dependent conductivity of syndiotactic polypropylene effect of temperature and electric field
2014 IEEE Electrical Insulation Conference (EIC)
2014
The Effect of Water Content on Time Domain Dielectric Response in Polyetheretherketone
IEEE Transactions on Dielectrics and Electrical Insulation
2023
学界情報:Jicable'23 - 11<sup>th</sup> International Conference on Insulated Power Cables 報告
IEEJ Transactions on Power and Energy
2023
Microscopy Study of Inception Sites of Vented Water Trees in a HV XLPE Cable Aged in Salt Water
2021 IEEE Electrical Insulation Conference (EIC)
2021
Field dependent conductivity of n-pentane
2017 IEEE 19th International Conference on Dielectric Liquids (ICDL)
2017
Electrical Ageing and Temperature Cycling of XLPE Insulation Saturated with Water
2022 IEEE 4th International Conference on Dielectrics (ICD)
2022
Calculation of ionization potentials and electron affinities for molecules relevant for streamer initiation and propagation
2008 IEEE International Conference on Dielectric Liquids
2008
Jicable 84 International Conference on Polymer-Insulated Power Cables
IEEE Transactions on Electrical Insulation
1986
Streamer inception in cyclohexane above and below freezing point
2008 IEEE International Conference on Dielectric Liquids
2008
Optimization of HVDC Converter Transformer Back-up Protection
2006 International Conference on Power System Technology
2006
High frequency FEM-based power transformer modeling: Investigation of internal stresses due to network-initiated overvoltages
Electric Power Systems Research
2007
Conduction and Electric Fields in Dielectric Liquids in Needle-to-Plane Gaps
Unknown Venue
2023
„VORES ØL“ Ajon og sociale relationer i Teso, Østuganda
Tidsskriftet Antropologi
1998
Cerman: Software for simulating streamer propagation in dielectric liquids based on the Townsend–Meek criterion
Computer Physics Communications
2021
Photoionization model for streamer propagation mode change in simulation model for streamers in dielectric liquids
Plasma Research Express
2020
Conductivity and capacitance of streamers in avalanche model for streamer propagation in dielectric liquids
Plasma Research Express
2019
Simulation model for the propagation of second mode streamers in dielectric liquids using the Townsend-Meek criterion
Journal of Physics Communications
2018
Publisher’s Note: “Field dependence on the molecular ionization potential and excitation energies compared to conductivity models for insulation materials at high electric fields” [J. Appl. Phys. 109, 073306 (2011)]
Journal of Applied Physics
2011

Education

Norwegian university of science and technology

PhD, Chemistry / December, 2010

Trondheim

Norwegian university of sciense and technology

MSc, Physics / June, 2003

Trondheim

Experience

SINTEF Energi AS

Researcher / August, 2003August, 2006

NTNU

professor / August, 2024Present

NTNU

PhD Student / August, 2006December, 2010

SINTEF Energi

Researcher / January, 2011September, 2018

SINTEF Energi

Reserach Manager / September, 2018April, 2024

SINTEF Energi

Senior researcher / September, 2022August, 2024

Links & Social Media

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