Results 41 to 50 of about 86 (79)

Research of simulation and experiment on arc characteristics of gas mechanical switch

High Voltage, Volume 9, Issue 3, Page 626-635, June 2024.
Abstract An arc is the high‐temperature discharge plasma produced in the opening process of mechanical switches, which directly affects the breaking capability of a hybrid DC circuit breaker. According to the physical mechanism of an electric arc, the construction of an arc model for simulation analysis is an important technical means in the electrical
Cheng Jiang, Lu Qu, Zhangqing Yu, Zhizheng Gan, Xin yan, Rong Zeng, Yulong Huang, Shaofu Li   +7 more
wiley   +1 more source

Metaheuristic‐based graded objective function strategy for optimal thyristor‐controlled series capacitors estimation in weak distribution systems with uncertain distributed generation

IET Generation, Transmission &Distribution, Volume 18, Issue 7, Page 1325-1342, April 2024.
This study proposes an optimal approach to improve the quality of a weak electrical power distribution system using thyristor‐controlled series capacitors (TCSC). The approach considers components like shunt capacitors and distributed generators, which are influenced by weather conditions.
Mohamed Abd‐El‐Hakeem Mohamed, Salah Kamel, Fendzi Mbasso Wulfran   +2 more
wiley   +1 more source

Advancements in Z‐Source Solid‐State Circuit Breakers for Enhanced Protection of DC Distribution Networks: A Comprehensive Review

Active and Passive Electronic Components, Volume 2024, Issue 1, 2024.
DC technologies constitute essential components within the scope of DC distribution networks. All DC networks confront inherent threats, such as DC short‐circuit faults, necessitating robust protective measures. Utilizing DC circuit breakers (DCCBs) emerges as a pivotal strategy for safeguarding these networks.
Sabah Daniar, Amirhossein Khosravi Sarvenoee, Yuh-Shyan Hwang   +2 more
wiley   +1 more source

Reliable directional relaying for T-Connected Series-Compensated transmission lines

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   +1 more source

Simulation Analysis of DC Fault Interruption Characteristics of Superconducting Electric Aircraft Propulsion

CSEE Journal of Power and Energy Systems
Environmental issues associated with the aviation industry are getting more attention as air traffic increases. Stringent standards are imposed for fuel consumption and pollution emissions for next-generation aircraft.
Muhammad Junaid, Xiaolong Yu, Shuzhi Cao, Wenqing Yu, Dongsheng Zuo, Jianhua Wang   +5 more
doaj   +1 more source

Design and performance evaluation of low-voltage solid-state DCCB using capacitor-based surge mitigation techniques

Power Electronic Devices and Components
This article conducts practical tests on four different configurations of solid-state DC circuit breakers (SS-DCCBs), investigating fault detection and circuit interruption phenomena in DC systems.
Mehdi Moradian, Tek Tjing Lie, Kosala Gunawardane   +2 more
doaj   +1 more source

Lightning Surge Immunity of LED Road Luminaires: A Comparative Study of Hybrid SPD, EMI Filter, and TVS-Diode Protection Strategies

IEEE Access
This study presents an experimental evaluation of surge protection performance of a LED road luminaire subjected to standardized 8/ $20\mu $ s impulse stress.
Vasilios P. Androvitsaneas
doaj   +1 more source

A DC SSCB With Range-Limited Parallel Operation Switches and a Snubber Circuit Utilizing Inverse Current Injection

IEEE Access
Although many snubber circuits have been studied, research on circuits that effectively suppress surge voltage while supporting bidirectional operation remains relatively limited.
Jae-Seong Jo, Sun-Pil Kim, Sang-Hyeok Lee, Sung-Geun Song, Feel-Soon Kang   +4 more
doaj   +1 more source

DC-SSCB Snubber for Electric Propulsion Ships With Effective Surge Voltage Reduction and Fast Dissipation of Fault Current Energy

IEEE Access
This paper proposes a snubber circuit for SSCB that performs voltage clamping operation in two stages to reduce surge voltage. The surge voltage is suppressed in the first stage using a MOV with low operating initiation and clamping voltages.
Jae-Hun Cha, Guangxu Zhou, Sung-Geun Song, Feel-Soon Kang   +3 more
doaj   +1 more source

国际上基于数值仿真计算金属氧化物避雷器的研究进展

Dianci bileiqi, 2018
系统综述了基于数值仿真计算技术在金属氧化物避雷器（metal-oxide surge arresters,MOA）研究中的应用发展。共分3个方面:1)基于等效电路模型的数值仿真计算;2)基于电、机械与热的两或多物理量（场）耦合的金属氧化物电阻片（metal-oxide surge varistor,MOV）数值仿真计算;3)整只MOA的电场、温度场或多物理场耦合的数值仿真计算。对于MOV的建模和仿真计算,将来主要的努力方向是改进数学计算模型,以便可以描述ZnO晶界与时间和温度相关的特性 ...
赵冬一, 李凡, 汤霖
doaj