Results 11 to 20 of about 92,641 (264)

A novel superimposed component‐based protection method for multi‐terminal transmission lines using phaselet transform

IET Generation, Transmission & Distribution, 2023
This paper presents a novel protection method for transmission lines that estimates the superimposed component phasor using phaselet transform. The phaselet transform computes the phasors over variable‐lenfgth data window at the instant of a fault, so it
Sajad Ansari, Navid Ghaffarzadeh
doaj   +1 more source

Molecular dynamics simulations guided the preparation of nano-silica/polyimide/cellulose composite insulating paper

Materials & Design, 2023
Following the surge in power loads and continuous improvement in the voltage level, insulating papers' mechanical and electrical properties face new challenges.
Wenchang Wei, Yiyi Zhang, Haiqiang Chen, Chuqi Xu, Junwei Zha, Shuangxi Nie   +5 more
doaj   +1 more source

Distributed automated control and protection system for power lines with any degree of longitudinal compensation [PDF]

E3S Web of Conferences, 2021
With longitudinal compensation of the reactance of the line, the problem of its protection against overcurrents arises from the point of view of relay protection. The problem is relevant with a greater degree of compensation.
Novokreshenov Vitaly Viktorovich, Ivanova Viliya Ravilevna, Rozhencova Nataliya Vladimirovna   +2 more
doaj   +1 more source

ReaxFF-MD in the field of pyrolysis of insulating oil: A review [PDF]

E3S Web of Conferences
This article reviews the application of the Reactive Molecular Dynamics (ReaxFF-MD) method in the field of insulating oil. It introduces the commonly used methods for constructing models of insulating oil and oil-paper, summarizes the pyrolysis ...
Yang Weiqi, Zhu Zhiping, Liao Jianping, Liu Zhifeng, Gao Fan, Chen Yufei, Wang Zhenggang   +6 more
doaj   +1 more source

Overview of Oman Power Transmission System and Protection Schemes for Effective Energy Management in Smart Grid Operations

Frontiers in Energy Research, 2021
This article presents an overview of the transmission system and protection schemes employed in the national power grid of Oman. The technical design requirements considering the percentage of allowable limits for the different transmission voltage ...
Saif Al Omairi, Marya Al Balushi, Kenneth E. Okedu, Kenneth E. Okedu   +3 more
doaj   +1 more source

The study of the electrical properties of nano insulating oil for submarine cables [PDF]

E3S Web of Conferences
At present, the alkylbenzene insulation oil for submarine cables of 220kV and above in China relies on imports, which poses high maintenance costs and supply interruption risks.
Tian Chen, Zhu Zhiping, Liao Jianping, Liu Zhifeng, Gao Fan, Chen Yufei, Wang Zhenggang   +6 more
doaj   +1 more source

Study of Transformer Core Vibration and Noise Generation Mechanism Induced by Magnetostriction of Grain-Oriented Silicon Steel Sheet

Shock and Vibration, 2021
The problem of vibration and noise in the iron core of power transformers remains quite topical. Insofar as the state-of-the-art iron core and binding production adopt the lamination method and weft-free adhesive tape, respectively, the transformer core ...
He Qiang, Nie Jingkai, Zhang Songyang, Xiao Weimin, Ji Shengchang, Chen Xin   +5 more
doaj   +1 more source

Laboratory investigation of dodecylbenzene diffusion from submarine cables [PDF]

E3S Web of Conferences
Oil-filled submarine cables have come to dominate the reliable delivery of electrical power today, but oil leakage still remain a challenge. This work focuses on the exploring of spill behavior of dodecylbenzene (DDB) after leakage and the detection of ...
Liu Zhifeng, Liao Jianping, Yang Weiqi, Gao Fan, Chen Yufei, Zhu Zhiping, Wang Zhenggang   +6 more
doaj   +1 more source

Experimental study of transformer oil explosion affected by a vertical steel plate [PDF]

AIP Advances
The transformer oil within the piping of ultra-high voltage converter transformers is prone to evaporation, forming a flammable oil–gas mixture. In the presence of an ignition source, an explosion of transformer oil can cause severe damage to the power ...
Yubiao Huang, Jiaqing Zhang, Lingxin He, Xianli Zhu   +3 more
doaj   +1 more source

Calculation of fault current in MMC-HVDC based on numerical inverse Laplace transform

电力工程技术, 2022
The fault transient analysis of the modular multilevel converter based high voltage direct-current (MMC-HVDC) system is an important basis for the refined design of protection strategies and the selection of equipment parameters.
WU Tonghua, DAI Wei, LI Xindong, HOU Xiaofan, OUYANG Ziqiang, YAN Zheng   +5 more
doaj   +1 more source