Results 41 to 50 of about 158,195 (164)

Noise Separation and Defect Recognition in AC Partial Discharge Pattern Signals Using Continuous Wavelet Transform

IEEE Access
Separating noise and partial discharge signals is essential for partial discharge analysis. However, the presence of conductive and radiative noise, such as switching pulses, electromagnetic interference, and network communication, makes this difficult ...
Tae-Yun Hong, Young-Woo Youn, Jong-Ho Sun, Jin-Gyu Kim   +3 more
doaj   +1 more source

Evaluation of Partial Discharge Separation Techniques

IEEE Access
Partial discharge (PD) analysis is widely recognized as a valuable technique for detecting faults and evaluating the condition of electrical system assets. However, its practical application poses significant challenges.
Joao Victor Jales Da Silva Melo, George Rossany Soares De Lira, Edson Guedes Da Costa, Pablo Bezerra Vilar, Antonio Francisco Leite Neto, Igor Monteiro Abreu Dos Santos, Hebert Santos Crispim, Fernando Do Nascimento Madia   +7 more
doaj   +1 more source

Application of detection method of ultrasound and high-frequency current in partial discharge detection of 35 kV switchgear

Gong-kuang zidonghua, 2014
The paper introduced basic principle, detection and determinants of partial discharge detection method based on a combination method of ultrasound and high-frequency current.
LUO Dongsong, LU Ye
doaj   +1 more source

Stator Insulation Partial Discharge Test and Reliability Evaluation of Traction Motor

机车电传动, 2021
Aiming at the local defects of traction motor stator insulation, based on the partial discharge pulse current method, a scheme for evaluating the reliability of traction motor stator insulation was proposed. First, discharge models were established based
Yuenan LIU, Min GENG, Junfeng GUI, Ruizhen CUI, Xilian WANG   +4 more
doaj  

Development of methods for measuring partial discharges in the solid insulation with gaseous defects of power transformers

Journal of Electrical Systems and Information Technology
This article presents a research project aimed at developing a method for measuring the intensity of the electric field inducing partial discharges (PDs) in a gaseous defect within a solid insulator.
Nyetereye Frederic, Usachev Alexander Evgenievich, Kubarev Artyom Yuryevich   +2 more
doaj   +1 more source

Partial Discharge Ultrasound Detection Using the Sagnac Interferometer System

Sensors, 2018
Partial discharge detection is crucial for electrical cable safety evaluation. The ultrasonic signals frequently generated in the partial discharge process contains important characteristic information.
Yu Wang, Xiaomin Li, Yan Gao, Hongjuan Zhang, Dong Wang, Baoquan Jin   +5 more
doaj   +1 more source

Partial discharge behavior and insulation failures detection in electrical devices subjected to impulse voltage excitation

International Journal of Electrical Power & Energy Systems
Partial discharges can occur within an insulating system due to flaws in the material and can cause continuous deterioration until a full breakdown occurs.
Manuel Eckert, Petr Mraz, Christof Ballweg, Josef Pihera   +3 more
doaj   +1 more source

Research on a Partial Discharge Expert System for the Diagnosis of Damaged Transformation Equipment

Applied Sciences
Partial discharge (PD) characteristics are very important for the diagnosis of damaged transformation equipment. If the power transmission and transformation equipment fails, it will cause large economic losses, and thus prevention is better than ...
Ping-Chang Tsai, Yu-Min Hsueh, Chang-Kuo Chen, Cheng-Chien Kuo   +3 more
doaj   +1 more source

Extraction and Evolution Analysis of Partial Discharge Characteristic Parameters in Moisture-Affected and Aged Oil–Paper Insulation

Applied Sciences
Oil–paper insulation in oil-immersed transformers undergoes a concealed degradation process that is difficult to detect during operation. To understand its discharge behavior, this study examines partial discharge characteristics under controlled ...
Ruiming Wang, Fubao Jin, Shangang Ma, Debao Wang, Caixiong Fan   +4 more
doaj   +1 more source

Study on the Detection of Single and Dual Partial Discharge Sources in Transformers Using Fiber-Optic Ultrasonic Sensors

Photonics
Partial discharge is a fault that occurs at the site of insulation defects within a transformer. Dual instances of partial discharge origination discharging simultaneously embody a more intricate form of discharge, where the interaction between the ...
Feng Liu, Yansheng Shi, Shuainan Zhang, Wei Wang   +3 more
doaj   +1 more source