Blar i NTNU Open på forfatter "Niayesh, Kaveh"
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Online Assessment of Contact Erosion in High Voltage Gas Circuit Breakers based on different Physical Quantities
Mohammadhosein, Milad; Niayesh, Kaveh; Shayegani Akmal, Amir Abbas; Mohseni, Hossein (Journal article; Peer reviewed, 2018)In this paper, an effort has been made to evaluate the online condition of arc contacts as a vital component of interruption chamber in high voltage puffer type SF6 circuit breakers. The relationship between eroded mass ... -
Online Assessment of Contact Erosion in High Voltage Gas Circuit Breakers based on different Physical Quantities
Mohammadhosein, Milad; Niayesh, Kaveh; Shayegani Akmal, Amir Abbas; Mohseni, Hossein (Journal article; Peer reviewed, 2018)In this paper, an effort has been made to evaluate the online condition of arc contacts as a vital component of interruption chamber in high voltage puffer type SF6 circuit breakers. The relationship between eroded mass ... -
Online non‐invasive evaluation of arcing time for condition assessment of high‐voltage gas circuit breakers
Mohammadhosein, Milad; Niayesh, Kaveh; Shayegani Akma, Amir Abbas; Mohseni, Hossein (Peer reviewed; Journal article, 2021)Online non‐invasive methods to assess circuit breaker condition have been under consideration in recent years. The combination of the arcing time and the short‐circuit current recorded by protective relays can be utilized ... -
Optical investigation on pre-strike arc characteristics in medium-voltage load break switches
Dorraki, Naghme; Niayesh, Kaveh (Journal article, 2021)Medium voltage load break switches (MV-LBS) should pass fault current while closing and be able to re-open for the next operation. Replacing SF6 as a high impact greenhouse insulating gas with air, makes the switch design ... -
Partial Discharge Characterization of New Environmentally Friendly Insulating Liquids
Fazlalizadeh, Mohammad (Master thesis, 2024)Uønsket sammenbrudd av isolasjon er en av de viktigste utfordringene som påvirker påliteligheten til kraftsystemer. Væskeisolasjon brukes ofte i strømnett og undervannsinstallasjoner på grunn av sine foretrukne egenskaper, ... -
Partial Discharge Detection in Power Electronic Substrates Exposed to Pulse Voltage Waveforms
Torkildsen, Morten Lund (Master thesis, 2018)An increasing number of power electronic converters are integrated in power systems. The fundamental functionality of electronic converters is turning on and off semiconductor switches to form the wanted voltage shape. ... -
Partial Discharge Inception in Ceramic Substrates Embedded in Silicone Liquid, Silicone Gel, and Mineral Oil at Fast Voltage Rise and Sinusoidal Voltage
Semenov, Ivan; Aakre, Torstein Grav; Folkestad, Ingrid Gunheim; Smisethjell, Ingrid; Niayesh, Kaveh; Lundgaard, Lars Esben (Journal article; Peer reviewed, 2024)This paper summarizes experiments that were carried out on insulating ceramic substrates and a needle-plane arrangement with the purpose to characterize the inception of partial discharges (PD) in the insulation of ... -
Performance Analysis of Passive Resonance Circuit Breakers in HVDC Systems
Ghavami, Sadegh; Razi-Kazemi, Ali Asghar; Niayesh, Kaveh (Peer reviewed; Journal article, 2022)High voltage direct current (HVDC) systems have been increasingly employed to provide a connection amongst various energy sources, especially renewable energies. In order to switch the load current in these systems, the ... -
Post-arc Dielectric Recovery Characteristics of Free-burning Ultrahigh-Pressure Nitrogen Arc
Abid, Fahim; Niayesh, Kaveh; Støa-Aanensen, Nina Sasaki (Chapter, 2019)This work contributes to the fundamental understanding of post-arc dielectric recovery characteristics of free-burning nitrogen arcs as a function of gas filling pressure. Arc peak current of 425 A at a frequency of 925 ... -
Research on Discharge Characteristics in Ultra-high Pressure Gases (Supercritical Fluids): A Brief Review
Niayesh, Kaveh (Journal article; Peer reviewed, 2023)This paper provides a review of the research on discharge characteristics in ultra high pressure gases (supercritical fluids) and discusses different applications in various fields. Followed by a summary on the investigations ... -
Self-blast Current Interruption and Adaption to Medium Voltage Load Current Switching
Taxt, Henning; Niayesh, Kaveh; Runde, Magne (Journal article; Peer reviewed, 2019)Ablation-assisted current interruption is a candidate for improving interruption capability in medium voltage switchgear. In high voltage switchgear, ablation is utilized to achieve high pressures in self-blast circuit ... -
Short-Circuit making of medium voltage load break switches using a grid Connected test circuit
Jabs, Philipp; Niayesh, Kaveh; Støa-Aanensen, Nina Sasaki (Chapter, 2018)The load break switch is an important component in the distribution grid. Besides its capability to break load currents reliably, it has to be able to make short-circuit currents according to the IEC 62271 standard. In ... -
Simulation and design of an electrodynamic Thomson coil actuator for fast mechanical switches
Hansen, Håkon Risbøl (Master thesis, 2022)En Thomson spole aktuator er en ultra-rask elektromagnetisk driv mekanisme. Drivmekanismen skal brukes til å drive den mekaniske bryteren i en hybrid likestrøms- (HVDC) effektbryter. Ved å utbedre designet av Thomson spolen ... -
Solid-State High-Voltage Pulse Generator for Low Temperature Plasma Ion Mobility Spectrometry
Ramezani, Mohammad; Shayegani Akmal, Amir Abbas; Niayesh, Kaveh (Journal article; Peer reviewed, 2019)Low-temperature plasma ion mobility spectrometry (LTP-IMS) is the method to identify some materials by measuring concentration of gas phase ions. IMS used in a wide range of laboratory-based biomedical research studies. A ... -
Spectroscopic Investigation of Metal Content in Prestrike Arc During Making Operation in a Low-Current Model Switch
Dorraki, Naghme; Niayesh, Kaveh (Journal article; Peer reviewed, 2020)Energy dissipation during prestrike arc is the critical factor for electrical contacts erosion and welding in medium voltage load break switches. Using air-filled devices as an alternative to SF₆ makes the switch environmentally ... -
Thermal interruption performance of ultrahigh-pressure free-burning nitrogen arc
Abid, Fahim; Niayesh, Kaveh; Thimmappa, Shashidhara Basavapura; Espedal, Camilla; Støa-Aanensen, Nina Sasaki (Chapter, 2020)In this paper, an experimental investigation of the thermal interruption performance of free-burning nitrogen arcs at 1 bar, 20 bar, and 40 bar filling pressures is reported. This work contributes to the fundamental ... -
Transformer insulation stressed by power converters
Skirbekk, Fanny (Master thesis, 2021)For å kunne ta i bruk flere fornybare energikilder i kraftsystemet, med så lite effekttap som mulig, blir stadig mer kraftelektronikk tatt i bruk i kraftsystemet. Kraftelektronikkomformere brukes primært til å skru av og ... -
Two-way Interaction between Switching Arc and Solid Surfaces: Distribution of Ablated contact and Nozzle Materials
Kadivar, Ali; Niayesh, Kaveh (Journal article; Peer reviewed, 2019)This paper is devoted to two-way plasma-surface interactions by investigating how the plasma arc ablates the nozzle and contacts and how the distribution of ablated materials changes the plasma parameters. For this ... -
Ultrahigh-Pressure Nitrogen Arcs Burning Inside Cylindrical Tubes
Abid, Fahim; Niayesh, Kaveh; Støa-Aanensen, Nina Sasaki (Journal article; Peer reviewed, 2018)When the pressure and temperature of a fluid exceed a critical point, the fluid enters into the supercritical (SC) region. In this region, the physical properties are believed to be in favor of a good current interruption ... -
Verification of a numerical MHD arc model for high voltage circuit breakers using experimental images
Abbasi, Vahid; Niayesh, Kaveh; Gholami, Ahmad (Journal article; Peer reviewed, 2017)The paper presents experimental and computational images of the arc in a simplified chamber. A circuit is arranged to inject the AC current into the electrodes. Arc current, magnetic field and plasma flow are described in ...