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This cable was instrumented with a longitudinally attached optical fiber and exposed to electric discharges. Using this system, it was possible to identify and locate partial discharges in both
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In this paper, we demonstrate a ber-optic fi sensor system that can successfully detect the partial discharge acoustic emis-sion from power cable joint defect.
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An integrated ultra-high frequency (UHF) and optical sensor is proposed and designed. Based on a 500-kV gas-insulated switchgear (GIS)
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Partial discharge will continuously corrode the insulation layer of cable, which will greatly reduce its insulation performance, thus causing cable operation failure and power failure. For some overhead
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2. Computation of lightning-induced disturbances in buried shielded cables A frequency-domain solution is particularly useful when one is interested in calculating the inner conductor response of a coaxial
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Study on the harm of induced voltage and induced current on the human body in 110kV double circuit transmission lines . Sichuan Electric Power Technology, 40 (03), 52-5+94.
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This paper proposes a low-power, fiber-powered acoustic emission sensing system for partial discharge (PD) monitoring in cable joints. Firstly, finite element simulations are conducted to
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This study proposes a PD monitoring system for power cable joints based on distributed optical fiber sensing technology. By tightly and meticulously wrapping the optical fiber around the
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Partial discharge acoustic detection is a powerful technique for assessment of the insulation integrity of power cables. In contrast to conventional method in which piezoelectric
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Recent theoretical works on the physics of the fiber fuse effect in optical fiber are reviewed. A qualitative interpretation of the significant increase in the absorption of quartz glass with increasing temperature
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To improve the safety and efficiency performance of partial discharge detection in a high-voltage direct current (HVDC) cable system, an optical fiber ultrasonic detection system for partial
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The statistical analysis on the phase resolved pulses detected by the ber-optic sensors and the ones fi detected by the electric sensors verify that the ber-optic sensors can success-fi fully detect the partial
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For optical fibre cable installations the precautions for working under Impressed Voltage Conditions need only be considered where the cable is armoured or screened with a metallic or conducting sheath or
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Plasma induced by nanosecond laser ablation is re-excited by a pulsed electric discharge and the parameters and optical emission of the plasma are measured. The discharge is a low
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Here, we propose and demonstrate an efficient approach for triggering, trapping and guiding electrical discharges in air. It is based on the use
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Abstract: In this study, to improve the sensitivity and accuracy of the detection of surface partial discharge (PD) in gas insulation switchgears (GISs), a combination of ultra-high frequency (UHF)
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To improve the long-term reliability and sensitivity of the sensing system, a novel method for cable joint monitoring based on implanting optical fibers within the joint structure is proposed.
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Partial discharge (PD) signal detection is critical for maintaining the reliability of high voltage (HV) cable insulation systems, which are fundamental components of power transmission
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This paper remedies the lack of comparison between studies specifically addressing partial discharge (PD) localization using electrical
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Here, we demonstrate a conceptually different approach to inducing and guiding electrical discharge along predetermined paths to desired targets over long distances in air.
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Partial Discharge (PD) measurements and diagnosis are considered as a valid tool for evaluating the condition especially of cable systems. The recently discussed optical measurement of
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Heat-induced strong absorption of silica glass optical fiber at more than 1050 °C 1 plays a potential risk in many fiber optics applications including optical communication and “power over
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Research on Optical Fiber Sensor Localization Based on the Partial Discharge Ultrasonic Characteristics in Long-Distance XLPE Cables January 2020 IEEE Access 8:184744-184751
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We present recent progress in our development of fibre-optic sensors for the detection of partial discharge (PD) in silicone cable accessories, based on detecting related low-level optical
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In , a Distributed Optical Fiber Fensor System (DOFS) uses acoustic wave emission phenomena to detect and locate electric discharges in electric machines and insulated electrical cables.
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This Technical Brochure describes the induction phenomena (inductive, capacitive and conductive) that can lead to presence of voltage and currents on
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In this paper, the performance of the two sensor systems was discussed on the partial discharge acoustic detection in power cable joints and compared with the conventional piezoelectric sensor.
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