Browsing NTNU Open by Author "Niayesh, Kaveh"
Now showing items 21-40 of 60
-
Effect of Filling Pressure on Post-Arc Gap Recovery of N2
Abid, Fahim; Niayesh, Kaveh; Viken, Egil; Støa-Aanensen, Nina Sasaki; Jonsson, Erik; Meyer, Hans Kristian Hygen (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 filling pressure on Thermal Reignition Performance of free burning ultra-high Pressure Nitrogen arc
Basavapura Thimmappa, Shashidhara (Master thesis, 2018)The aim of this thesis is to study the thermal reignition characteristics of the free burning arc in SC nitrogen medium. Rate of change of current before interruption and rate of rise of recovery voltage (RRRV) after ... -
Effects of Fast Elongation on Switching Arcs Characteristics in Fast Air Switches
Kadivar, Ali; Niayesh, Kaveh (Journal article; Peer reviewed, 2020)This paper is devoted to investigating the effects of high-speed elongation of arcs inside ultra-fast switches (ucontact≈ 5–80 m/s), through a 2-D time-dependent model, in Cartesian coordinates. Two air arcs in series, one ... -
Experimental investigation on ablation-assisted current interruption - Experimental setup and preliminary results
Taxt, Henning; Niayesh, Kaveh; Jonsson, Erik; Runde, Magne (Chapter, 2016)This paper presents a flexible setup to investigate ablation-assisted interruption of load currents. The electrical test circuit is grid connected with a transformer secondary voltage from 6.9 kV to 24 kV. The applied ... -
An Experimental Study of Short-Circuit Current Making Operation of Air Medium-Voltage Load Break Switches
Dorraki, Naghme; Niayesh, Kaveh (Peer reviewed; Journal article, 2022)Replacing SF 6 , the most potent greenhouse gas, with an alternative gas is a challenge faced by medium-voltage load break switches (MV-LBS). Air is a possible alternative, but there are some challenges regarding low ... -
HVDC Circuit Breakers: A Comprehensive Review
Mohammadi, Fazel; Rouzbehi, Kumars; Hajian, Masood; Niayesh, Kaveh; Gharehpetian, Gevork; Saad, Hani; Hasan Ali, Mohd.; Sood, Vijay K. (Peer reviewed; Journal article, 2021)High Voltage Direct Current (HVDC) systems are now well-integrated into AC systems in many jurisdictions. The integration of Renewable Energy Sources (RESs) is a major focus and the role of HVDC systems is expanding. ... -
Impact of Ablation Based Self Blast Nozzles on Load Break Switch Current Interruption Performance
Røren, Paul Monceyron; Niayesh, Kaveh (Journal article; Peer reviewed, 2023)In this contribution, SF6 free ablation assisted medium voltage load break switchgear, has been investigated. In these switches, gases generated by the arc polymer interactions are trapped in expansion chambers and are ... -
Impact of pre-strike arc on contacts degradation after short cir- cuit current making operation in medium voltage air load break switches
Dorraki, Naghme; Strand, Marius; Niayesh, Kaveh (Chapter, 2021)Medium voltage load break switches are required to perform a number of making operation while passing of short circuit current that could be more than tens of kiloamperes. Using air-filled devices as an alternative to SF6, ... -
Impact of Surface Morphology on Arcing Induced Erosion of CuW Contacts in Gas Circuit Breakers
Mohammadhosein, Milad; Niayesh, Kaveh; Shayegani Akmal, Amir Abbas; Mohseni, Hossein (Chapter, 2018)In this paper, the impact of surface morphology of contacts, in particular different microstructural parameters like size and distribution of contact ingredients, on contact erosion in high voltage gas circuit breaker is ... -
Influence of Surface Roughness on Breakdown in Air Gaps at Atmospheric Pressure under Lightning Impulse
Feet, Odd Christian; Mauseth, Frank; Niayesh, Kaveh (Chapter, 2018)In high voltage equipment, gases are often used as insulation material. Several parameters can influence the dielectric withstand voltage of gaseous insulation systems, such as the degree of inhomogeneity, gas pressure and ... -
Investigating Transient Overvoltages due to Multiple Reignitions when Switching Small Inductive Loads
Hansen, Erik (Master thesis, 2023)I denne rapporten undersøkes de transiente overspenningene som produseres fra åpningen av en vakuumbryter i et mellomspennings smelteverk. En fiktiv modell av et smelteverk med korte kabellengder ble laget i ATPDraw. De ... -
Investigation of Contact Erosion and Arc-Welding in a Medium Voltage Switching Device Using COMSOL
Sanden, Martin (Master thesis, 2019)Denne master oppgaven omhandler effektene lysbuen hadde på en mellomspennings effektbryter under lukkeoperasjoner. Hovedmålet for oppgaven var å finne den totale kontakterosjonen og styrken på lysbuesveisen etter at lukking ... -
Investigation of Partial Discharges in AlN Substrates under Fast Transient Voltages
Semenov, Ivan; Gunheim, Ingrid Folkestad; Niayesh, Kaveh; Meyer, Hans Kristian Hygen; Lundgaard, Lars Esben (Peer reviewed; Journal article, 2022)The objective of this paper is to characterize partial discharge (PD) inception voltages and patterns at sinusoidal and square voltages in insulating ceramic substrates with generic manufacturing defects. PD tests were ... -
Investigation of PD formation on AlN Ceramic Substrates: Impact of Square Voltage Pulses and Dielectric Liquids
Smisethjell, Ingrid (Master thesis, 2023)Det elektriske kraftsystemet gjennomgår en kompleks utvidelse og opplever raske spenningsendringer som skyldes endringer i driftsmønsteret. Disse forholdene har betydelig innvirkning på komponenter og utstyr i strømnettet, ... -
Investigation of polymer ablation and AirPlus^TM for load current interruption of medium voltage systems
Rustad, Kristoffer (Master thesis, 2022)Bruken av koblingutstyr er uunngåelig i ethvert strømnett, da de kontrollerer effektflyten i systemet. Denne masteroppgaven har hovedsakelig fokusert på bryting av laststrømmer for mellomspenningssystemer. Bryterteknologi ... -
Investigation of the Transient Recovery Voltage across Circuit Breakers in Networks with Distributed Energy Resources
Wetjen, Siri Kjærstad (Master thesis, 2019)Tilkoblingen av små-skala kraftproduksjon i distribusjonsnettet har mange positive sider. Dette innebærer blant annet reduserte kostnader relatert til re-investering i transmisjonslinjer, økt pålitelighet, og en økt andel ... -
Investigation on Fault Current Making in Medium Voltage Switchgear in Air
Dorraki, Naghme (Doctoral theses at NTNU;2022:106, Doctoral thesis, 2022)Closing a switch under a fault condition could result in extensive electrical contact wear and a possible switch failure. A load break switch (LBS), as one of the critical components in medium voltage (MV) power grids, ... -
Medium voltage load current interruption in presence of ablating polymer material
Taxt, Henning; Niayesh, Kaveh; Runde, Magne (Journal article; Peer reviewed, 2018)The expected abolishment of SF6-gas in medium voltage switchgear has prompted a search for replacements for the switch types that depend on SF6 to obtain the required capability, reliability, compactness and cost. Ablation ... -
Metal vapor content of an electric arc initiated by exploding wire in a model N2 circuit breaker: simulation and experiment
Kadivar, Ali; Niayesh, Kaveh; Abid, Fahim (Peer reviewed; Journal article, 2020)A conductive wire can explode by rapidly heating it to vaporization temperature by flowing a current through it. This process is utilized to generate high-temperature high-density plasmas. The temperature and pressure ... -
Nozzle Wear and Pressure Rise in Heating Volume of Self-blast Type Ultra-high Pressure Nitrogen Arc
Abid, Fahim; Niayesh, Kaveh; Støa-Aanensen, Nina Sasaki (Journal article; Peer reviewed, 2019)This paper reports on experiments with ultra-high pressure nitrogen arcs in a self-blast type switch design. The effect of filling pressure on nozzle mass loss and pressure-rise in the heating volume is investigated. An ...