Results 41 to 50 of about 240 (181)

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   +1 more source

An intelligent protection scheme for series-compensated transmission lines connecting large-scale wind farms

Frontiers in Energy Research, 2023
Series-compensated transmission lines (SCTLs) are increasingly preferred for transmitting bulk amounts of electricity generated from the present-day large-scale wind farm to the utility grid due to several technical and economic benefits. However, when a
M. S. Prabhu, Sauvik Biswas, Paresh Kumar Nayak, Almoataz Abdelaziz, Adel El-Shahat   +4 more
doaj   +1 more source

Computational Model and Experimental Validation of the Influence of Grain‐Boundary Parameters on the Electrical Performance of Arrester Varistor

International Journal of Ceramic Engineering &Science, Volume 8, Issue 1, January 2026.
This paper presents a calculation model for the nonlinear characteristics of varistors based on a basic conductive mechanism, and it has been verified through experiments. The mechanism of the barrier's effect on electrical performance has been obtained.
Zhengzheng Fu, Zongxi Zhang, Songhai Fan, Tao Cui, Donghui Luo, Pengfei Meng, Yue Yin, Jingke Guo   +7 more
wiley   +1 more source

An Adaptive Pulse‐Width Driving Method for Ultra‐Fast Mechanical Switches in DC Interruption Applications

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
This study introduces an adaptive speed control strategy for fast mechanical switches using an IGBT fully controlled driving circuit. The approach combines PWM‐based current shaping with an intelligent secant algorithm to regulate opening speed in real time without hardware changes.
Wei Li, Feiyang Yu, Xiangyu Zhang, Tianpeng He, Lei Qi   +4 more
wiley   +1 more source

Study on the Unipolar Impulse Aging Characteristics of ZnO Varistors and Their Condition Monitoring Methods

Applied Sciences
Metal-oxide surge arresters (MOSAs) are critical devices for overvoltage protection in power systems, and the aging characteristics of their zinc oxide (ZnO) varistors under impulse and power-frequency voltages exhibit significant differences.
Yongqiang Fan, Wenkai Meng, Xiaoyun Tian, Yonggang Yue, Zhihui Li, Minxin Xu, Xinyan Xiao, Lanjun Yang   +7 more
doaj   +1 more source

Comparative Assessment of Lightning Overvoltages at Transformer and Hydrogenerator Terminals Under Nonideal Station‐Side Metal‐Oxide Arrester Conditions

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
This study comparatively assesses lightning‐overvoltage propagation to the transformer high‐voltage terminal and hydrogenerator busbar of a hydropower plant under prescribed lightning‐current injection and selected nonideal conditions of a station‐side metal‐oxide arrester.
Jiachen Zhang, Bo Zhang, Wang Guo, Chenen Sun, Zeyu Zhao, Yuanyang Liu, Jichun Yi, Wei Li, Yanliang Qiu, Guanjun Zhang   +9 more
wiley   +1 more source

Accurate Fault Current Phasor Estimation in Series‐Compensated Transmission Lines Using Improved Particle Swarm Optimisation

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
A new evolutionary search algorithm based on improved Particle Swarm Optimisation (PSO) is introduced in this study to estimate the phasor. The performance has been evaluated through extensive simulations considering transient components, harmonics, and frequency changes in noiseless and noisy conditions.
Seyedeh Mina Abed Shiadeh, Ali Akbar Abdoos, Ali Ebadi   +2 more
wiley   +1 more source

A Self‐powered LVDC Solid‐State Circuit Breaker Using Low Voltage Step‐Up DC/DC Converter

IET Power Electronics, Volume 19, Issue 1, January/December 2026.
This paper introduces a self‐powered LVDC solid‐state circuit breaker that harvests the forward drop of a Schottky diode via an ultra‐low voltage step‐up converter, eliminating the need for an auxiliary supply. A parallel MOSFET‐SCR conduction path and a Hall‐effect‐based electromagnet enable autonomous fault detection and tripping for both fast and ...
Dewan Mohammad Asad, Abdul Jabber Antor, Sajib Biswas Shuvo, Muhammad Abdullah Arafat   +3 more
wiley   +1 more source

A Bi‐GRU–Based Protection Scheme for Reliable Fault Identification in Series‐Compensated Transmission Lines

IET Smart Grid, Volume 9, Issue 1, January/December 2026.
This paper presents a deep Bidirectional Gated Recurrent Unit (Bi‐GRU)‐based protection scheme for series‐compensated transmission lines using only local voltage and current measurements. The proposed method extracts fundamental‐frequency phasors through discrete Fourier transform and is trained on a comprehensive dataset covering various compensation ...
Majid Khezerloo, Mojtaba Beiraghi, Reza Ghanizadeh   +2 more
wiley   +1 more source

Determining the effect of bismuth oxide on the microstructure and electrical response of cold‐sintered ZnO varistors

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Abstract Microstructure homogeneity and grain size reduction are needed to ensure the current uniformity and reliability required in metal oxide varistors for DC circuit breakers. Cold sintering (CS)–a low‐temperature digestive liquid and high‐pressure densification process–has previously shown reduced grain growth, but it is not clear how the lower ...
Kayla Y. Chuong, Yang Liu, Thomas Forbes, Marshall B. Frye, Lukas Graber, Lauren M. Garten   +5 more
wiley   +1 more source