Results 41 to 50 of about 141 (133)

A New Active Method for Islanding Detection Based on Traveling Wave Theory

Iranian Journal of Electrical and Electronic Engineering, 2018
In this paper, a new active method based on traveling wave theory for islanding detection is presented. A standard power grid that combines a distributed generation source and local loads is used to test the proposed method.
S. Dolatabadi, S. Tohidi, S. Ghasemzadeh
doaj  

Influence of Wideband Cable Model for Electric Vehicle Inverter–Motor Connections: A Comparative Analysis

Machines
Electric vehicles (EVs) rely on robust inverter-to-motor connections to ensure high-efficiency operation under the challenging conditions imposed by wide-bandgap (WBG) semiconductors.
Easir Arafat, Mona Ghassemi
doaj   +1 more source

High impedance fault modelling and application of detection techniques with EMTP‐RV

The Journal of Engineering, 2018
The aim of this study is to develop a software‐oriented framework that will help simulate and study high impedance faults (HIFs) in power distribution systems, as well as design adequate HIF detection techniques. After a thorough literature review, three well‐established HIF models have been developed in EMTP‐RV, as part of this work. Systematic (black
Vassilis C. Nikolaidis, Angelos D. Patsidis, Aristotelis M. Tsimtsios   +2 more
openaire   +1 more source

Enhancing Speed of Distance Protection for Internal Faults in the Second Zone through an Innovative Protection Algorithm

International Transactions on Electrical Energy Systems, Volume 2024, Issue 1, 2024.
Electric power systems constantly encounter disturbances and faults, necessitating fast and precise identification and rectification of these issues. This is crucial for ensuring the stability and reliability of the system. This paper introduces a protection scheme for accelerating the second zone operation of the distance relay during internal faults.
Sabah Daniar, Mojtaba Shiroei, Amirhossein Khosravi Sarvenoee, Arvind R. Singh   +3 more
wiley   +1 more source

A Lissajous Curve–Based Method for Busbar Protection

International Transactions on Electrical Energy Systems, Volume 2024, Issue 1, 2024.
In this paper, a novel time‐domain method based on the orientation analysis of the superimposed current component Lissajous curves is presented for busbar protection. The conducted study has showed that the orientations of the superimposed current component Lissajous curves are different under internal and external fault conditions. These curves during
M. Sarlak, Akshay Kumar Saha
wiley   +1 more source

Overcoming the Limits of the Charge Transient Fault Location Algorithm by the Artificial Neural Network

Energies, 2019
In this paper, two algorithms for single-ended fault location are presented with reference to the unearthed sub-transmission Italian grid (with a voltage level of 60 kV).
Roberto Benato, Giovanni Rinzo, Michele Poli   +2 more
doaj   +1 more source

Study on residual-magnetism detection of protection current transformers based on square-wave excitation at a predefined frequency

Zhejiang dianli
Accurate detection of residual magnetism in protection current transformer （CT） cores is essential for effective demagnetization and for preventing protection misoperations caused by CT saturation.
ZHANG Xin, GONG Chengyao, CHEN Yunlong, HU Yin, HUANG Chencheng, ZHENG Taiying   +5 more
doaj   +1 more source

Localization of partial discharge in the high voltage apparatus

Results in Control and Optimization
Partial discharges (PD) in high-voltage (HV) devices can be used as indicators of insulation deterioration, often preceding catastrophic failures in power systems.
Amir Ghaedi, Mehrdad Mahmoudian, Eduardo M.G. Rodrigues, Rui Melicio   +3 more
doaj   +1 more source

Study on Fault Mechanism of Lightning Flashover Based on EMTP - RV in Wind Farm

Journal of Physics: Conference Series, 2019
The particularity of lightning flashover failure of wind farm is analyzed, and it is pointed out that the formation mechanism of lightning overvoltage in wind farm collector system is different from that of power system distribution network. On this basis, the mechanism of lightning flashover failure of wind farm collector system is analyzed.
Shi Zhang, Bo Zhang, Hui Xia, Tong Sun, Jinchuan Zhai, Xiangqi Kong, Li Cao, Huanjie Huo   +7 more
openaire   +1 more source

Transient Protection of UHV Busbars Based on Standardized VMD-Shannon Entropy

IEEE Access
Transient bus protection exhibits ultra-high-speed action, yet displays low reliability under weak fault conditions. This paper proposes a novel multidimensional fault analysis framework to address this issue.
Zhenwei Guo, Yongyan Jiang, Zebo Huang, Yangsheng Liu   +3 more
doaj   +1 more source