Location of Small Discharges in Plastics Insulated High Voltage Cables

Wieringa,

doi:10.1109/mper.1985.5528543

Cited by 2 publications

(1 citation statement)

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“…The advantages of solid composite insulators are simple structure, excellent mechanical tensile strength, non-breakdown, and excellent stain resistance [8,9]. However, there are also a few disadvantages which are chiefly due to the following: bulkiness, brittleness, low production efficiency, internal core caulking, and interface defects [10][11][12][13][14][15]. The insulating core is filled with an insulating medium as internal insulation, but which does not provide the mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

A Novel Lightweight Polyurethane Composite for Application on Ultra-High-Voltage Insulator Core Filler

Zhao

et al. 2020

Polymers

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This study aimed to prepare a new lightweight ultra-high-voltage insulator core filler composite, which can solve the problem of bulkiness. In this study, rigid polyurethane foam pellets with different densities are used as lightweight fillers and polyurethane resins to compound lightweight composite materials. On accounting for working conditions, the density, insulation, heat resistance, water absorption and mechanical properties are tested. The compressive properties of composites are determined by a foam skeleton and a process. Among three kinds of composites, in which the composites with the best comprehensive performance are materials filled with pellets to a density of 0.15g·cm−3. The density, surface resistance, volume resistance, leakage current, initial decomposition temperature, water absorption, force, rupture displacement and limiting oxygen index (LOI) of composites are 0.665 g·cm−3, 1.17 × 1014 Ω, 9.68 × 1014 Ω·cm, 0.079 mA, 208 °C, 0.047%, 2262 N, 2.54 mm, and 23.3%, respectively. The ultra-high-voltage insulator core filler in this study can reduce the weight of the solid core insulator crossarm for Ultra-High Voltage (UHV) by 50–75%.

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Section: Introductionmentioning

confidence: 99%

A Novel Lightweight Polyurethane Composite for Application on Ultra-High-Voltage Insulator Core Filler

Zhao

et al. 2020

Polymers

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A survey of incipient fault detection and location techniques for extruded shielded power cables

Miri

Privette²

Proceedings of 26th Southeastern Symposium on System Theory

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The existing techniques for the detection and location of incipient faults (e.g.. electrical trees) in extruded developed for field applications arc included. The advantages and disadvantages of each technique arc evaluated from the point of view of a power engineer. The desired features of an ideal incipient fault detection and location system arc identified. Guided by these features, direcrions for future research in this area arc suggested. shielded power cables ale reviewed. only the techniques Keywords--Incipient Faulr Insulation degradation; partial discharge detection; timc-domain reflectomcay; dielectric ohmic lossts. Lntroduction Aesthetic concerns and incnaSingly expensive rightsof-way for overhead power lines, combined with improved power cable designs, has made the use of underground cables in transmission and distribution of power more acceptable to power companies. 402 0-8186-5320-5294 $03.00 0 1994 IEEE

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Location of Small Discharges in Plastics Insulated High Voltage Cables

Cited by 2 publications

References 0 publications

A Novel Lightweight Polyurethane Composite for Application on Ultra-High-Voltage Insulator Core Filler

A Novel Lightweight Polyurethane Composite for Application on Ultra-High-Voltage Insulator Core Filler

A survey of incipient fault detection and location techniques for extruded shielded power cables

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