Results 21 to 30 of about 177 (121)
Precision and Accuracy of Pulse Propagation Velocity Measurement in Power Cables
Energies, 2023 The partial discharge (PD) measurement is an important method used in determining the condition of medium- and high-voltage cable insulation. Considering the propagation velocity of PD signals in power cables is necessary for determining the location of ...
Ivar Kiitam +5 more
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Sensors, 2016 A well-defined condition-monitoring for power transformers is key to implementing a correct condition-based maintenance (CBM). In this regard, partial discharges (PD) measurement and its analysis allows to carry out on-line maintenance following the ...
Ricardo Albarracín +2 more
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IEEE Access, 2022 This paper deals with the study of the AC breakdown voltage (BDV) and partial discharges (PDs) activity of synthetic ester-based nanofluids (NF) with two kinds of carbonic nanoparticles (NPs), namely graphene (Gr) and fullerene (C60); the synthetic ester
Hocine Khelifa +2 more
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Comparison between the PD Characteristics of g3 and Dry Air for Gas-Insulated Switchgears
Energies, 2022 This paper presents a comparison between the partial discharge (PD) characteristics of g3 and dry air for gas-insulated switchgears. PD signals were measured with a conventional method according to IEC 60270 and an ultra-high frequency (UHF) method.
Goang-Chul Shin +2 more
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High Voltage, 2020 The ultra-high frequency (UHF) method has been widely used in a gas-insulated system (GIS) for partial-discharge detection, and many achievements have been realised.
Jiangrong Cheng +3 more
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Dianci bileiqi, 2021 根据IEC 60270标准建立局部放电起始电压（PDIV）测试电路,采用两种方法,即根据IEC61294标准提出IEC方法和根据IEC标准改编的组合PDIV方法,研究了矿物油在针-板电极和针-球电极两种不同电极结构下的局部放电起始电压和局部放电（PD）特性。还研究了不同温度和含水量的Nynas Nytro 4000x矿物油在交流电压下的PDIV和PD特性。试验结果表明,PDIV的大小与电极的电场强度和试验方法有明显关系,与其它电极结构相比,针尖半径为10μm、平面直径为75 mm的针 ...
宋涛, 李丹, 白光亚, 陈少坤
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Development of an Industrial Partial Discharge Calibrator and Its Performance Tests
IEEE AccessIn industrial electromechanical manufacturing, ensuring the accuracy of electrical partial discharge measurements is crucial for the reliability and efficiency of electrical power systems.
Ismail Karaman, Ali Ajder, Ismail Nakir
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A Critical Overview of the Impact of Nanoparticles in Ester Fluid for Power Transformers
Energies, 2023 This paper examines the impact of various nanoparticles on ester fluids with a special focus on their usage towards power transformers. The precautionary measures to be considered on the nanofluids such as preparation methodologies with an appropriate ...
Arputhasamy Joseph Amalanathan +2 more
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DEVELOPMENT AND CALIBRATION OF A MICROCONTROLLER BASED PARTIAL DISCHARGE CALIBRATOR
Electrica, 2016 Partial discharge is an instantaneous energy release depending on a charge accumulation caused by an electric field localized in any section of insulation materials. In this phenomenon, there is no observation of full discharge but electrical perforation
Kaan GÜLNİHAR, Mukden UĞUR
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MATEC Web of Conferences, 2018 Power transformer (PT), essential equipment in electrical power system proceeds complicated manufacturing process to meet high standard design. During manufacturing process of PT, the drying stage is of importance to remove excessive moisture contaminant
Siswanto +3 more
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