Results 61 to 70 of about 298,259 (190)
Comparison of Dielectric Recovery After Arc Burning in SF6 Gas and Its Potential Alternatives
High Voltage, EarlyView.ABSTRACT Although sulphur hexafluoride (SF6) exhibits exceptional insulating properties, it is a potent greenhouse gas. Therefore, studying alternatives to SF6 is critical for developing environmentally friendly high‐voltage electrical equipment.
Ziqi Liu +4 more
wiley +1 more source
Impulse ageing of polymeric materials
, 2011 Impulse over-voltage is a common phenomenon in electric power systems. A switching impulse is created by a switching surge or local fault while a lightning impulse is due to direct lightning strike to high voltage plant such as an overhead line.
Dao, Ngoc Long
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Results in EngineeringThe impulse grounding resistance is a critical parameter for evaluating performance of lightning protection devices, and effectively reducing this resistance remains a major challenge in lightning protection or electrical engineering. While most previous
Juan Zhang +6 more
doaj +1 more source
High Voltage, EarlyView.ABSTRACT This paper investigates the generation mechanism of quasi‐power‐frequency resonant overvoltage triggered by multiple lightning strikes in high‐voltage alternating current (HVAC) systems equipped with shunt reactors. Based on field measurements from a 500 kV AC system, equivalent and simplified circuit models have been established to analyse ...
Tao Liang +7 more
wiley +1 more source
The effect of multiple lightning impulse on the electrical characteristic of opto-isolator as lightning protective devices [PDF]
, 2008 The behavior and performance of surge protective devices such as optoisolator under the application of multiple lightning voltage impulse are different from the single lightning voltage impulse test.
Sidik @ Mat Sidek, Ahmad
core
High Voltage, EarlyView.ABSTRACT Strong wind–sand weather in Xinjiang threatens power grid safety by increasing transmission line tripping risks. Existing studies focus on sand polarization but neglect the coupled influence of high‐speed airflow and charged sand on gap discharge characteristics.
Jianghai Geng +8 more
wiley +1 more source
EPJ Web of Conferences, 2017 Protection against lightning is always a challenging job for the researcher. The consequences due to lightning on different building shapes needs a comprehensive knowledge in order to provide the information to the common man.
Ullah Irshad +4 more
doaj +1 more source
Study on the Power‐Frequency Arc Extinction Characteristics of Semi‐Closed Short‐Gap Device
High Voltage, EarlyView.ABSTRACT Multi‐chamber arc‐extinguishing devices have a simple structure and excellent arc‐extinguishing performance; thus, they have attracted considerable attention as lightning protection devices. However, the structural parameters of different models of the aforementioned devices vary, leading to inconsistent protection levels; therefore, the arc ...
Yeqiang Deng +4 more
wiley +1 more source
Electrical engineering & Electromechanics, 2017 Purpose. Calculation and experimental researches of electro-thermal resistibility of the pre-production thin-walled sheet models of outward roof of height technical buildings from stainless steel are easily soiled 12Х18Н10Т to direct action on them ...
M. I. Baranov +2 more
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Research Progress in Treeing Phenomena of Polypropylene Insulation Materials
High Voltage, EarlyView.ABSTRACT Polypropylene (PP) is increasingly utilised in high‐voltage systems due to its superior electrical and thermal properties. However, electrical treeing poses a significant threat to its long‐term reliability, potentially leading to insulation failure.
Boxue Du, Heyu Wang, Zhonglei Li
wiley +1 more source