Results 31 to 40 of about 14,778 (170)

Monitoring Porcelain Insulator Condition Based on Leakage Current Characteristics

Materials, 2022
Insulator monitoring using leakage current characteristics is essential for predicting an insulator’s health. To evaluate the risk of flashover on the porcelain insulator using leakage current, experimental investigation of leakage current indices was carried out.
Ali Ahmed Salem, Kwan Yiew Lau, Mohd Taufiq Ishak, Zulkurnain Abdul-Malek, Samir A. Al-Gailani, Salem Mgammal Al-Ameri, Ammar Mohammed, Abdulaziz Ali Saleh Alashbi, Sherif S. M. Ghoneim   +8 more
openaire   +3 more sources

Accurate Assessment of Moisture Content and Degree of Polymerization in Power Transformers via Dielectric Response Sensing

Sensors, 2023
Power transformers are essential apparatuses used to transfer electrical energy from one voltage-level circuit to another. For reliable systems, preventive maintenance of the transformers is required to ensure good services of all mechanical, electrical,
Anantawat Kunakorn, Sarawuth Pramualsingha, Peerawut Yutthagowith, Phethai Nimsanong, Supat Kittiratsatcha   +4 more
doaj   +1 more source

Detection of humidity ingress using online common-mode insulation impedance-monitoring system

The Journal of Engineering, 2019
Enhanced machine reliability through monitoring of its state of health is an emerging field of research. Ingress of contaminants such as moisture can effect electrical machine state of health and contribute to failure in winding insulation.
Igor Tsyokhla, Antonio Griffo, Antonio Griffo, Jiabin Wang   +3 more
doaj   +1 more source

Research and application of intermittent partial discharge characteristics and easy-warning system for electric equipment

Energy Reports, 2022
Intermittent partial discharge has become an essential threat to the safety and stability of high voltage electrical equipment. In order to reduce the sudden insulation breakdown failure due to the intermittent and latent partial discharge of the ...
Bo Niu, Dr, Feiyue Ma, Xutao Wu, Hui Ni, Xiu Zhou, Hong Wu   +5 more
doaj   +1 more source

Design of a High-Voltage Insulation Resistance Detection System for Commercial Vehicles

Batteries
Based on the safety monitoring requirements of power batteries for new energy commercial vehicles, this study proposes a battery insulation detection method utilizing the bridge method in combination with existing insulation detection techniques. Through
Feng Guo, Danping She, Xinfeng Zhang, Yue Han   +3 more
doaj   +1 more source

Novel Resistive Leakage Insulation Detector for Metro Electrical Fire Monitoring

Chengshi guidao jiaotong yanjiu
[Objective] Traditional equipment used for electrical fire leakage insulation monitoring in metro systems suffers from low leakage detection accuracy, poor traceability, and high false alarm rates.
ZHANG Lei, ZHAO Xiaohao, ZHAO Hailong, REN Dantong   +3 more
doaj   +1 more source

Frequency Response Analysis: An Overview of the Measurement Process and Interpretation of Results for Fault Diagnosis and Location in Power Transformers [PDF]

International Journal of Industrial Electronics, Control and Optimization
One of the main components of a power transformer is the transformer insulation system, namely, transformer insulation oil and transformer insulation paper. Any failure can cause the transformer to fail temporarily or permanently.
Hamed Shadfar, Hamid Reza Izadfar
doaj   +1 more source

Review of Physicochemical-Based Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers

Energies, 2016
A power transformer outage has a dramatic financial consequence not only for electric power systems utilities but also for interconnected customers.
Janvier Sylvestre N’cho, Issouf Fofana, Yazid Hadjadj, Abderrahmane Beroual   +3 more
doaj   +1 more source

DYNAMICS MODEL OF MOISTURE IN PAPER INSULATION-TRANSFORMER OIL SYSTEM IN NON-STATIONARY THERMAL MODES OF THE POWER TRANSFORMER

Electrical engineering & Electromechanics, 2016
Introduction. An important problem in power transformers resource prognosis is the formation of moisture dynamics trends of transformer insulation. Purpose.
V.V. Vasilevskij
doaj   +1 more source

Research on Stator Main Insulation Temperature Field of Air-Cooled Turbo-Generator after Main Insulation Shelling

Energies, 2018
The stator main insulation is the key component of turbo-generator, which is related to the thermal aging of turbo-generator. It is vital to accurately judge the generator aging by calculating the temperature distribution under main insulation normal ...
Weili Li, Yong Li, Ying Su, Purui Wang, Wenmao Liu   +4 more
doaj   +1 more source