Results 11 to 20 of about 2,095 (173)

Loss and Thermal Modeling of Metal Oxide Varistors (MOV) Under Standard Current Surge Mission Profile [PDF]

2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019
Because of their crucial role in protecting power electronic equipment against over-voltages and transients, metal oxide varistors (MOV) represent a key component of the electrical system. Although improper heat dissipation and internal temperature rises can lead to a significant decrease in performance or even to a wear-out failure of the MOV, there ...
Ionut Vernica, Per Thastrup Jensen, Huai Wang, Francesco Iannuzzo, Susanne Otto, Frede Blaabjerg   +5 more
semanticscholar   +6 more sources

Metal Oxide Varistor (MOV) Lifetime Estimation with Impulse-Based Testing in PV Inverter Systems

2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2022
Surges caused by lightning strikes could damage electrical components in photovoltaic (PV) systems. Metal oxide varistors (MOVs) are commonly used to protect PV systems from lightning strikes.
Yuxi Men, Xiaonan Lu, Zheyu Zhang, Ramanathan Thiagarajan   +3 more
openaire   +2 more sources

FDTD Electromagnetic and Thermal Simulation of a Metal Oxide Varistor Element Considering the Temperature Dependence of Its Resistivity

Electricity, 2021
Electromagnetic fields and the heat of a metal oxide varistor (MOV), in which a lightning impulse current flows, are calculated using the finite-difference time-domain (FDTD) method.
Tokuya Tanaka, Yoshihiro Baba, Yoshimasa Tsujimoto, Naoyuki Tsukamoto   +3 more
doaj   +2 more sources

Mathematical Model Predicting the Heat and Power Dissipated in an Electro-Conductive Contact in a Hybrid Woven Fabric [PDF]

AUTEX Research Journal, 2020
Electro-conductive (EC) yarns can be woven into a hybrid fabric to enable electrical current to flow through the fabric from one component A to another component B. These hybrid fabrics form the bases of woven e-textiles.
Hertleer Carla, Meul Jeroen, De Mey Gilbert, Vasile Simona, Odhiambo Sheilla A., Van Langenhove Lieva   +5 more
doaj   +3 more sources

Comprehensive Analysis of Transient Overvoltage Phenomena for Metal-Oxide Varistor Surge Arrester in LCC-HVDC Transmission System with Special Protection Scheme

Energies, 2022
This paper proposes a systematic and deterministic method for metal-oxide varistor (MOV) surge arrester selection based on the comprehensive analysis in line-commutated converter (LCC)-based high-voltage direct current (HVDC) transmission systems.
Jaesik Kang
doaj   +2 more sources

Faulty Phase Identification for Transmission Line with Metal Oxide Varistor-protected Series Compensator

Journal of Modern Power Systems and Clean Energy, 2021
The nonlinear operation of metal oxide varistor (MOV)-protected series compensator in transmission lines introduces complications into fault detection approaches.
Mohammed Hussien Hassan Musa, Ling Fu, Zhengyou He, Yumin Lei   +3 more
doaj   +2 more sources

Investigations into Recycling Zinc from Used Metal Oxide Varistors via pH Selective Leaching: Characterization, Leaching, and Residue Analysis [PDF]

The Scientific World Journal, 2015
Metal oxide varistors (MOVs) are a type of resistor with significantly nonlinear current-voltage characteristics commonly used in power lines to protect against overvoltages.
Toni Gutknecht, Anna Gustafsson, Christer Forsgren, Christian Ekberg, Britt-Marie Steenari   +4 more
doaj   +2 more sources

Reliable directional relaying for T-Connected Series-Compensated transmission lines [PDF]

Scientific Reports
This article introduces an extensive directional relaying algorithm designed for series-compensated transmission lines. The proposed algorithm relies on observing the locus of the calculated impedance of the change of the positive-sequence circuit.
Mahmoud A. Elsadd, Ahmed R. Adly, Mahmoud M. Elgamasy   +2 more
doaj   +2 more sources

A novel embedded voltage‐clamped circuit for multilevel modular converters submodule to suppress very fast transient overvoltage

High Voltage
The submodule in multilevel modular converters experiences a very fast transient overvoltage (VFTO) during switch operation of gas‐insulated switchgear, which also results in overvoltage on power devices, such as thyristors and insulated gate bipolar ...
Hong Shen, Zhonghao Dongye, Mian Xiao, Jiayi Shao, Xiangyu Zhang, Yao Yao, Zifan Dong, Lei Qi   +7 more
doaj   +2 more sources

Modeling and Development of AC Power System Control and Protection with an Application Metal Oxide Varistors (MOV) [PDF]

NIU Journal of Humanities
This paper presents a comprehensive approach to the modeling and development of AC power system control and protection, emphasizing the critical role of Metal Oxide Varistors (MOVs) in ensuring system stability and reliability.
Kuponiyi, David S., Odeyemi, Charity S., Ogunobi, Steven G., Olajide, Matthew B.   +3 more
openaire   +3 more sources