Results 11 to 20 of about 488 (109)
Precision Calibration System for Partial Discharge Calibrators
Proceedings of the Nordic Insulation Symposium, 2019 Partial discharge calibrators need to be periodically calibrated traceable to national standards. VTT MIKES, the National Metrology Institute (NMI) of Finland, has official expertise to calibrate the apparent charge of PD calibrators from 1 pC to 100 nC according to IEC 60270.
Hällström, Jari, Havunen, Jussi
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Calibration Technology and Application of Ultrasonic Sensor for Partial Discharge Detector [PDF]
Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering, 2015 Guangke Xu 1, a , Fuchun Sun, Weiwei Zhang , Ming Li , Zhenhua Zhu, Andong Wang , Fuqiang Zhao 1,g , Jie Liu , and Xiuzhong Gong 1 State Grid Shandong Electric Power Research Institute, Jinan, 250002, China 2 State Grid Yantai Power Supply Company, Yantai, 264000, China 3 Shandong Zhongshiyitong Group Co., Ltd. Jinan, 250002, China xuguangkesd@163.com,
Xiuzhong Gong +8 more
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Research on Calibration Technology of TEV Partial Discharge Smart Sensors
Journal of Physics: Conference Series, 2021 Abstract TEV partial discharge detection is an important method to judge the insulation status of the switchgear. However, the quality of TEV smart sensors produced by different manufacturers on the market is uneven. Some TEV smart sensors that have been put into operation have deficiencies in measurement sensitivity, data stability, and
Hongming Shao, Zhiguo Tang
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MetrologyThis study presents a characterization method for High-Frequency Current Transformers (HFCTs) intended for partial discharge (PD) measurement in on-line acquisition systems designed for AI-based processing and clustering.
Laura Della Giovanna +2 more
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An Improved Method for Performance Testing of Partial Discharge Calibrators
, 2019 Partial discharges occur because of insulation defects, when the electric field amplitude locally exceeds the dielectric strength of the cavities inside the insulating material. The thermal, chemical and electrical phenomena associated with the partial discharges are dangerous for insulation systems of high voltage equipment, as they can accelerate the
Dalibor Filipovic-Grcic +2 more
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Evaluation of Uncertainty in Partial Discharge Measurement: A Case Study
IEEE AccessISO/IEC 17025:2017 recommends all accredited laboratories under this standard, performing testing and calibration, shall identify and evaluate the contributions to the uncertainty of their measurements.
Asif Islam +5 more
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Propagation of Partial Discharge Pulses in Winding
Advances in Electrical and Electronic Engineering, 2004 A lot of measurements of the attenuation of partial discharge pulses on the model of winding was realized in the HighVoltage Laboratory of the Czech Technical University in Prague.
Karel Zalis
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Calibration Proposal for UHF Partial Discharge Measurements at Power Transformers [PDF]
Energies, 2019 The continuous, non-intermitted service of electrical grids relies on the reliability of their assets, e.g., power transformers. Local insulation defects can result in serve failures such as breakdowns with severe subsequent costs. The prevention of such events is crucial.
Martin Siegel +10 more
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Partial Discharge Monitoring of Power Transformers by Calibrated UHF Measurements
Journal of Energy : EnergijaPartial discharge (PD) measurement is an established technique to detect local defects in the oil/paper insulation. They can be measured by electrical PD measurements according to IEC 60270 or by electromagnetic measurements in the ultra-high frequency range (UHF: 300 MHz – 3 GHz).
Siegel, Martin +4 more
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The Design, Fabrication, and Evaluation of a Phase-Resolved Partial Discharge Sensor Embedded in a MV-Class Bushing. [PDF]
Sensors (Basel), 2023 Lee GY, Kim NH, Kim DE, Kil GS, Kim SW.
europepmc +1 more source