Results 81 to 90 of about 6,992 (266)

Dynamic Identification of Critical Transmission Lines in Power Systems With Wind Power Integration Based on Maximum Influence Theory

IEEE Access
With the integration of large-scale renewable energy sources, the risk of power system operation has increased significantly. To effectively prevent large-scale blackout incidents, it is essential to identify the critical transmission lines within the ...
Gang Ruan, Changzheng Shao, Hao Wang, Yingxu Jin, Lingzi Zhu, Dongxu Chang   +5 more
doaj   +1 more source

The determination of short circuits and grounding faults in electric power systems using time-frequency analysis

Journal of Energy in Southern Africa, 2017
In order to ensure that electrical energy reaches consumers uninterrupted, researchers constantly try to improve power transmission lines. To realize this improvement, probable faults should be analysed through every known method, and new methods should ...
Vedat Esen, Bulent Oral Oral, Tahir Cetin Akinci   +2 more
doaj   +1 more source

Power converter fault analysis in hvdc transmission line

, 2021
Nüfus artışı, büyüyen kentler, artan enerji talebi ve artan çevre sorunları enerji iletim sistemlerinin yetersiz kalmasına yol açmaktadır. Özellikle yoğun nüfuslu bölgelerde yeni HVAC iletim hatlarının yapılması için yeterli alanı bulmak giderek zorlaşmaktadır.
openaire   +2 more sources

Historical Foundation and Practical Guideline for Ferroelectric Switching Kinetic Studies

Advanced Functional Materials, EarlyView.
The P and U pulses in the conventional PUND measurements are not identical because of the interplay between switching current and the measurement circuit components. This circuit effect can lead to a shift in polarization transients and misinterpreted physics in the switching kinetics.
Yi Liang, Pat Kezer, John T. Heron
wiley   +1 more source

Multi-Fault Diagnosis of Three-Phase Four-Wire Inverter Based on Fuzzy Logic

Energies
In modern power systems such as new energy generation and smart grids, inverters serve as core equipment for electrical energy conversion and transmission.
Jian Huang, Yuan Sun, Heping Fu, Guan Wang, Zuosheng Yin, Kai Cui, Chao Zhang   +6 more
doaj   +1 more source

Performance Analysis and Threshold Quantization of Transformer Differential Protection Under Sampled Value Packets Loss/Delay

IEEE Access, 2019
The performance of the process network in the smart substation is particularly important for relaying functions implementation, and the transmission quality of sampled value packets is becoming the key constraint on protections because they carry ...
Ruiwen He, Hao Peng, Qingyun Jiang, Lei Zhou, Jianxin Zhu   +4 more
doaj   +1 more source

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

Advanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang, Zhewen Xu, Yuwen Xu, Björn Josteinsson, Simon Josephy, Dawei Zhang, Yunlong Sun, Heung‐Sik Park, Jihun Kim, Kanghyun Chu, Kyung Song, Danyang Wang, Chan‐Ho Yang, Andrea Morales, Jan Seidel   +14 more
wiley   +1 more source

Glissile Interphase Boundaries Enable Collective Phase Switching in Epitaxial Polar Oxides

Advanced Functional Materials, EarlyView.
A triple point is identified in the phase diagram of low‐symmetry epitaxial BiFeO3 thin film along with an extended regime of phase competition associated with a flattened energy landscape. The electromechanical response is shown to be governed by correlated interphase‐boundary motion, including scale‐free avalanche dynamics characteristic of systems ...
Mohammad Moein Seyfouri, Oliver Paull, Ralph Bulanadi, Yasuhiro Sakamoto, Shintaro Yasui, Mikayla Lord, Mahak Chhabra, David Walker, Patrycja Paruch, Shery Chang, Nagarajan Valanoor, Daniel Sando   +11 more
wiley   +1 more source

A Transmission Line Fault Diagnosis Model Based on Interpretable BRB With Power Set

IEEE Access
It is crucial to diagnose transmission line faults quickly and accurately. Belief rule base (BRB) has strong nonlinear modeling ability, allowing for the effective utilization of both qualitative knowledge and quantitative data related to these faults ...
Boying Zhao, Kangle Li, Bing Xu, Gaixia Ge, Wei He   +4 more
doaj   +1 more source

Location of Faults in Power Transmission Lines Using the ARIMA Method

Energies, 2017
One of the major problems in transmission lines is the occurrence of failures that affect the quality of the electric power supplied, as the exact localization of the fault must be known for correction.
Danilo Pinto Moreira de Souza, Eliane da Silva Christo, Aryfrance Rocha Almeida   +2 more
doaj   +1 more source