Results 11 to 20 of about 214,445 (299)

Comparative Study on the Switchgear Partial Discharge Characteristics Based on Transient Earth Voltage and Pulse Current Detection Methods

Zhongguo dianli, 2022
The transient earth voltage (TEV) method is studied in detection performance for switchgear partial discharge, and compared with the pulse current detection method.
Rongbin XIE, Chao YANG, Qiang SHEN, Shiyong LI, Yong LUO, Boning YU   +5 more
doaj   +1 more source

Research on Optical Fiber Sensor Localization Based on the Partial Discharge Ultrasonic Characteristics in Long-Distance XLPE Cables

IEEE Access, 2020
To improve the safety and antielectromagnetic interference performance of partial discharge detection in high-voltage DC cables, partial discharge of cables is used as a criterion for characterizing insulation defects.
Zhiheng Liu, Xiuling Liu, Zhaoyan Zhang, Wenna Zhang, Jianquan Yao   +4 more
doaj   +1 more source

Partial Discharge Ultrasonic Detection Method and Frequency Characteristics at Oil-filled Cable Terminal

Zhejiang dianli, 2022
In order to effectively detect latent insulation faults at oil-filled cable terminals， the finite element analysis method of acoustic field is used to study the characteristics of partial discharge acoustic field distribution at oil-filled cable ...
DU Liang, GUO Wei, WENG Huiying, JIN Yating, WU Hao, ZHANG Weichao   +5 more
doaj   +1 more source

Detection technology of partial discharge in transformer based on optical signal

Energy Reports, 2023
The detection of partial discharge (PD) in transformers is of great significance for preventing insulation defects from developing into insulation failures. Transformer partial discharge detection technology includes pulse current method, radio frequency
Shuangrui Jia, Yunfei Jia, Zewei Bu, Simeng Li, Liang Lv, Shengchang Ji   +5 more
doaj   +1 more source

Experimental study of visual corona under aeronautic pressure conditions using low-cost imaging sensors [PDF]

, 2020
Visual corona tests have been broadly applied for identifying the critical corona points of diverse high-voltage devices, although other approaches based on partial discharge or radio interference voltage measurements are also widely applied to detect ...
Gómez Pau, Álvaro, Moreno Eguilaz, Juan Manuel, Riba Ruiz, Jordi-Roger   +2 more
core   +2 more sources

Обнаружение частичных разрядов импульсным методом [PDF]

, 2012
Выпускная квалификационная работа содержит 124 с., 68 рис., 13 табл., 22 источника, 1 прил. Ключевые слова: импульсный метод, частичный разряд, обнаружение, дефект, науглероживание. Объекты исследования: секции конденсатора (90 пФ, 0,12 мкФ, 700 пФ, 1100
Hess, K., Marx, Nikolaus
core   +2 more sources

Distributed Partial Discharge Locating and Detecting Scheme Based on Optical Fiber Rayleigh Backscattering Light Interference

Sensors, 2023
Optical fiber sensors are used for partial discharge detection in many applications due their advantage of strong anti-electromagnetic interference capability.
Zhengxian Zhou, Hao Liu, Dawei Zhang, Yashuai Han, Xinyan Yang, Xianfeng Zheng, Jun Qu   +6 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

Denoising Analysis of Partial Discharge Acoustic Signal Based on SVMD-PCA

Journal of Applied Science and Engineering, 2023
Partial discharge (PD) acoustic signal detection is one of the effective means to assess the insulation status of power transformers. In actual monitoring, white noise is likely to cause strong interference to the partial discharge acoustic signal of the
Panpan Cao, Jianqiao Ma, Guangze Yang, Sheng Li   +3 more
doaj   +1 more source

Towards the text compression based feature extraction in high impedance fault detection [PDF]

, 2019
High impedance faults of medium voltage overhead lines with covered conductors can be identified by the presence of partial discharges. Despite it is a subject of research for more than 60 years, online partial discharges detection is always a challenge,
Fulneček, Jan, Hrbáč, Roman, Mišák, Stanislav, Prílepok, Michal, Vantuch, Tomáš   +4 more
core   +1 more source