Results 41 to 50 of about 10,554 (149)

Void Partial Discharge Simulation Under a Repetitive Frequency Square Wave with Different Overshoot Rates

Energies
Long-term partial discharge (PD) erosion is an important factor causing insulation failure. With the rapid development of power electronics and the widespread application of inverters, more insulation is subjected to repetitive frequency square wave ...
Ruizhou Guo, Tao Jin, Wei Wang, Ruifeng An, Pan Wu, Shuquan Yan, Lin Cong, Yinzhang Cheng, Zhipeng Lei   +8 more
doaj   +1 more source

Localization for Dual Partial Discharge Sources in Transformer Oil Using Pressure-Balanced Fiber-Optic Ultrasonic Sensor Array

Sensors
The power transformer is one of the most crucial pieces of high-voltage equipment in the power system, and its stable operation is crucial to the reliability of power transmission.
Feng Liu, Yansheng Shi, Shuainan Zhang, Wei Wang   +3 more
doaj   +1 more source

A cosine similarity-based method for improving the accuracy of GIS discharge spectrum recognition

Zhejiang dianli
The study of effective feature extraction and optimization algorithms is crucial for improving the accuracy of partial discharge （PD） detection in gas-insulated switchgear （GIS）. To enhance the precision and reliability of GIS partial discharge detection
CHEN Xiaoxin, ZHOU Tonghao, LIU Jiangming, DAI Pengfei, LIU Yanqi, LI Wendong, ZHANG Guanjun   +6 more
doaj   +1 more source

Statistical Study on Space Charge effects and Stage Characteristics of Needle-Plate Corona Discharge under DC Voltage

Energies, 2019
The air’s partial discharges (PD) under DC voltage are obviously affected by space charges. Discharge pulse parameters have statistical regularity, which can be applied to analyze the space charge effects and discharge characteristics during the ...
Disheng Wang, Lin Du, Chenguo Yao
doaj   +1 more source

Theoretical Study of SOF₂ Adsorption on Pd/Pt-Ni(111) Bimetallic Surfaces

Applied Sciences, 2019
Partial discharge has become a serious threat to the stable operation of gas-insulated switchgears. SOF2 is a characteristic decomposition component of SF6 decomposition components under partial discharge, which further deteriorate the severity of ...
Shiming Gan, Yingang Gui, Xiaoyan Bao, Dong Chen   +3 more
doaj   +1 more source

A Building Block to the Design of Partial Discharge Free HV and MV Cables: Modeling Defects and Discharge Inception Voltage

IEEE Access
It is well assessed that partial discharges, PD, are one of the major causes of MV and HV cable system breakdown, thus investigating partial discharge phenomenology and harmfulness is a key topic in relation to electric asset component reliability ...
Gian Carlo Montanari, Muhammad Shafiq, Sukesh Babu Myneni   +2 more
doaj   +1 more source

Partial discharges in power transformers [PDF]

E3S Web of Conferences
Tansformers are among the most responsible and expensive elements of the power system, therefore monitoring the technical condition of the transformer is an important and urgent task.
Lopatchenko Gleb, Groshev Alexander, Lukonin Alexey, Kuimov Denis, Yurov Alexander   +4 more
doaj   +1 more source

Research on the Evolution Mechanism of Partial Discharge Signals for Arcing Faults in Transformers

IEEE Access
Effective monitoring and identification of partial discharge (PD) signals caused by arcing faults is essential for the prevention of transformer explosions.
Chenlei Han, Keli Gao, Wenzhi Chang, Bo Qi, Jiangang Bi, Shuai Yuan, Meng Huang, Tingyu Gao   +7 more
doaj   +1 more source

Condition Evaluation of Large Generator Stator Insulation Based on Partial Discharge Measurement

Advances in Mechanical Engineering, 2013
The large generator faults are mostly from the stator insulation, which is aged by exposure to a combination of thermal, electrical, mechanical, and harsh environment stresses. Condition evaluation of stator insulation is an important measure of ensuring
Ruihua Li, Ling Pan, Chen Yan, Hao Li, Bo Hu   +4 more
doaj   +1 more source

PD Detection and Analysis Triggered by Metal Protrusion in GIS Through Various Methods

Applied Sciences
Defects in GIS can be effectively detected by detecting the partial discharge (PD). The common methods of detecting partial discharge are pulse current, ultrasonic and UHF (ultra-high frequency). However, the results of different methods may be different
Weifeng Xin, Wei Song, Manling Dong, Xiaochuan Huang, Xiaoshi Kou, Zhenyu Zhan, Xinyue Shi, Xutao Han   +7 more
doaj   +1 more source