Results 21 to 30 of about 88 (79)

Studies on an Electromagnetic Transient Model of Offshore Wind Turbines and Lightning Transient Overvoltage Considering Lightning Channel Wave Impedance

Energies, 2017
In recent years, with the rapid development of offshore wind turbines (WTs), the problem of lightning strikes has become more and more prominent. In order to reduce the failure rate caused by the transient overvoltage of lightning struck offshore WTs ...
Li Zhang, Shengwei Fang, Guozheng Wang, Tong Zhao, Liang Zou   +4 more
doaj   +1 more source

Analisis Karakteristik Arrester Pada Jaringan Transmisi 150kV Akibat Sambaran Petir Berbasis Perangkat Lunak EMTP

Patria Artha Technological Journal, 2020
Pemodelan karakteristik arrester pada jaringan transmisi 150kv akibat sambaran petir merupakan salah satu cara yang praktis untuk membentuk jalan yang mudah dilalui oleh arus petir, sehingga tidak timbul tegangan lebih pada peralatan.
Mochammad Apriyadi
doaj   +1 more source

Experimental and Analytical Studies on Lightning Surge Response of the Quadruple-Circuit Transmission Line

IEEE Access, 2023
The compact design of a 500 kV quadruple-circuit transmission line can effectively reduce the line corridor area, but the height of the tower also increases, increasing the probability of suffering a lightning strike.
Qianxin Zhu, Yi Zhang, Yutang Ma, Fangrong Zhou, Hongjiang Yin, Haihu Zhang, Hao Pan, Hao Geng, Bingzhen Zhang, Zhengjun Cheng, Lei Yu, Tingwei Qiu   +11 more
doaj   +1 more source

Smart Grid Resilience for Grid-Connected PV and Protection Systems under Cyber Threats

Smart Cities, 2023
In recent years, the integration of Distributed Energy Resources (DERs) and communication networks has presented significant challenges to power system control and protection, primarily as a result of the emergence of smart grids and cyber threats.
Feras Alasali, Awni Itradat, Salah Abu Ghalyon, Mohammad Abudayyeh, Naser El-Naily, Ali M. Hayajneh, Anas AlMajali   +6 more
doaj   +1 more source

Systematization of the Simulation Process of Transformer Inrush Current Using EMTP

Applied Sciences, 2019
An inrush current is generated when a transformer is energized. This current has a large magnitude and rich harmonics, thereby causing mal-operation of the protection relay.
Hun-Chul Seo, Gi-Hyeon Gwon
doaj   +1 more source

Influence of Lightning Current Model on Simulations of Overvoltages in High Voltage Overhead Transmission Systems

Energies, 2020
The analysis of lightning overvoltages generated in electrical power systems has a great meaning for the designers and exploitation engineers because it creates bases for the optimization of construction overhead transmission lines and high voltage ...
Jakub Furgał
doaj   +1 more source

Evaluation of the Transient Overvoltages of HVDC Transmission Lines Caused by Lightning Strikes

Energies, 2022
High-voltage direct-current (HVDC) transmission systems are considered an outstanding solution due to high electrical losses emerging from long-distance transmission. However, HVDC transmission lines (TLs) are vulnerable to lightning strikes.
Amr S. Zalhaf, Ensheng Zhao, Yang Han, Ping Yang, Abdulrazak H. Almaliki, Reda M. H. Aly   +5 more
doaj   +1 more source

Research on Electromagnetic Transient Processes of Long Marshalling High-Speed Train Passing Articulated Split-Phase Region

IEEE Access, 2019
When a long marshaling high-speed train (HST) with two raised pantographs passes an articulated split-phase region, there will be eight electromagnetic transient processes along with pantograph arcing.
Ke Huang, Zhigang Liu, Xin Li
doaj   +1 more source

PC Implementation of a Real-Time Simulator Using ATP Foreign Models and a Sound Card

Energies, 2018
This work reports the personal computer implementation of a real-time simulator based on the widely used Electromagnetic Transients Program, version Alternative Transients Program (EMTP-ATP) software for testing protection and control devices.
Renzo G. Fabián Espinoza, Yuri Molina, Maria Tavares   +2 more
doaj   +1 more source

Defense Algorithm Based on Reinforcement Learning and Digital Twin for Distribution Protection Devices Adversarial Samples

Engineering Reports, Volume 8, Issue 6, June 2026.
Power system protection devices are vulnerable to adversarial samples. We propose a digital twin and reinforcement learning framework. It trains a virtual model within safe operational boundaries, reducing the false operation rate to below 3.5%. The model's inference delay is under 10 ms, meeting real‐time protection requirements.
Wei Zhang, Shuai Zhang, Song Wang, Zheran Zheng   +3 more
wiley   +1 more source