Results 41 to 50 of about 86,487 (250)

Partial discharge on-line monitoring for HV cable systems using electro-optic modulators

, 2004
A technique for the remote inspection and monitoring of partial discharge (PD) activity using an optical network is described. The network uses a LiNbO3 modulator to modulate the intensity of the transmitted laser light approximately proportional to the ...
Pommerenke, David, Wilkinson, James S., Tian, Y., Sutton, S.J., Lewin, P.L., Tian, Yuan, Sutton, Simon J., Wilkinson, J.S., Pommerenke, D., Lewin, Paul L.   +9 more
core   +1 more source

Effect of SF6 pressure on the sensitivity of partial discharge detection of typical defects in GIS

电力工程技术, 2023
The gas pressure of gas insulated switchgear (GIS) is the key factor affecting the sensitivity of partial discharge (PD) detection. In this paper, four defect models, tip, suspension, void, surface, are constructed on the PD experimental platform.
KONG Fanjun, MA Jingtan, CHEN Minhao, ZHANG Chaohai   +3 more
doaj   +1 more source

On image transformation for partial discharge source identification in vehicle cable terminals of high‐speed trains

High Voltage
Partial discharge (PD) detection of cable terminals is crucial for the safe operation of the traction power system in trains. However, similar PD signals in complex train‐operating environments cause difficulty to recognise the insulation defects ...
Kai Liu, Shibo Jiao, Guangbo Nie, Hui Ma, Bo Gao, Chuanming Sun, Dongli Xin, T. Saha, Guangning Wu   +8 more
semanticscholar   +1 more source

Feature Selection for Partial Discharge Severity Assessment in Gas-Insulated Switchgear Based on Minimum Redundancy and Maximum Relevance

Energies, 2017
Scientific evaluation of partial discharge (PD) severity in gas-insulation switchgear (GIS) can assist in mastering the insulation condition of in-service GIS.
Ju Tang, Miao Jin, Fuping Zeng, Siyuan Zhou, Xiaoxing Zhang, Yi Yang, Yan Ma   +6 more
doaj   +1 more source

Towards Precise Interpretation of Oil Transformers via Novel Combined Techniques Based on DGA and Partial Discharge Sensors

Italian National Conference on Sensors, 2021
Power transformers are considered important and expensive items in electrical power networks. In this regard, the early discovery of potential faults in transformers considering datasets collected from diverse sensors can guarantee the continuous ...
S. Ward, Adel El-Faraskoury, Mohamed Badawi, S. Ibrahim, K. Mahmoud, M. Lehtonen, M. Darwish   +6 more
semanticscholar   +1 more source

Multiscale Fusion Simulation of the Influence of Temperature on the Partial Discharge Signal of GIS Insulation Void Defects

IEEE Transactions on Power Delivery, 2022
Gas insulated switchgear (GIS) in service may tolerate large temperature changes, which leads to uncertainty in the evaluation of the partial discharge (PD) signal.
Hui Song, Zhaoqi Zhang, Jiapeng Tian, G. Sheng, Xiuchen Jiang   +4 more
semanticscholar   +1 more source

Modelling of Partial Discharge Behaviour in a Spherical Cavity within a Solid Dielectric Material as a Function of Temperature

, 2010
Partial discharge (PD) is an electrical discharge within a dielectric which does not bridge the electrodes. PD measurement has been widely used for assessing performance of insulation systems.
P L Lewin, H A Illias, G Chen, Lewin, P L, Illias, H, Chen, G   +5 more
core   +1 more source

Radiometric Wireless Sensor Network Monitoring of Partial Discharge Sources in Electrical Substations

, 2015
A wireless sensor network (WSN) with the potential to monitor and locate partial discharge (PD) in high-voltage electricity substations using only received signal strength (RSS) is proposed.
Jaber, Adel, Tachtatzis, Christos, Atkinson, Robert, Pavlos Lazaridis, Ahmed, Hamd, Vieira, Maria Fatima Queiroz, Vieira, Maria de Fatima Queiroz, Alexandre Mopty, David Upton, Yong Zhang, Peter Mather, Judd, Martin, Adel Jaber, Lazaridis, Pavlos, Bahghtar Saeed, Mopty, Alexandre, Upton, David, Glover, Ian, Hamd Ahmed, Saeed, Bahghtar, Saeed, Bakhtiar I., Christos Tachtatzis, Ian Glover, Martin Judd, Mather, Peter, Robert Atkinson, Zhang, Yong, Maria de Fatima Queiroz Vieira   +27 more
core   +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

Analysis of partial discharge Ultrasonic wave characteristic on typical Defects in GIS

MATEC Web of Conferences, 2016
For analyzing partial discharge ultrasonic wave characteristic on typical defects in SF6 gas insulation switchgear (GIS), a 110 kV GIS was taken as an object to design and simulate the typical partial discharge models in GIS.
Yang Jing Gang, Shi Wen, Li Hong Tao, Gong Bin, Jiang Wei Yi   +4 more
doaj   +1 more source