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Partial discharge

About: Partial discharge is a research topic. Over the lifetime, 13997 publications have been published within this topic receiving 102058 citations. The topic is also known as: PD.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors put forward the significance of using mixture gas to reduce the use of CF3I and control the produce of I2, and the partial discharge inception voltages in the positive half cycle of power frequency (PDIV+) under different pressures, mixing ratios (k) and interelectrode distances were measured and compared with SF6/CO2.
Abstract: SF6 is widely used in C-GIS as an insulating medium. However, SF6 and its decomposition products can pollute environment and harm human health and equipment. Firstly, this paper verifies the high-energy discharge promotes CF3I to produce C2F6 and I2 by simulation. Therefore the paper puts forward the significance of using mixture gas to reduce the use of CF3I and control the produce of I2. Secondly, the partial discharge inception voltages in the positive half cycle of power frequency (PDIV+) of CF3I/CO2 under different pressures, mixing ratios (k) and interelectrode distances were measured and compared with SF6/CO2. The results show that: when k is more than 10%, the PDIV+ of CF3I/CO2 is close to or higher than SF6/CO2 in the same experimental conditions; The PDIV+ of CF3I/CO2 (30%-40%) at 0.15-0.2MPa can reach the level of pure SF6 in 0.1MPa. The breakdown experiments under different electric fields shows that the breakdown characteristic of CF3I/CO2 (30%-40%) at 0.15-0.2MPa can exceed the level of pure SF6 at 0.1MPa. Considering the boiling point, producing of I2 and insulating property, CF3I/CO2 (30%-40%) is likely to replace SF6 used in C-GIS.

26 citations

Proceedings ArticleDOI
15 Oct 2000
TL;DR: In this paper, a new measuring system which allows the digital acquisition of Partial Discharge (PD) signals and a new separation method, based on a Fuzzy Classifier, for the analysis of the PD-pulse shape signals are presented.
Abstract: Results of investigations performed in order to improve the current diagnostic techniques used for the evaluation of insulation systems of HV apparatus are presented in this paper. Improvements come from the development of a new measuring system which allows the digital acquisition of Partial Discharge (PD) signals and a new separation method, based on a Fuzzy Classifier, for the analysis of the PD-pulse shape signals. The identification of the classes, relevant to different PD phenomena, is then performed by means of PD-pulse height and phase analysis. The proposed approach is supported by the analysis of PD data obtained from insulation systems of stator bars with artificially-reproduced defects.

26 citations

Patent
21 Oct 2004
TL;DR: In this article, an insulation degradation diagnostic device consisting of a current transformer (7 a ), a first amplifier (15), a first high-pass filter (17), a low pass filter (19), a second amplifier (20 ), a second high pass filter(21), and a discharge judgement section (30) is presented.
Abstract: An insulation degradation diagnostic device ( 1 a ) comprises a current transformer ( 7 a ), a first amplifier ( 15 ), a first high-pass filter ( 17 ), a low-pass filter ( 19 ), a second amplifier ( 20 ), a second high-pass filter ( 21 ), and a discharge judgement section ( 30 ). The current transformer ( 7 a ) has a filtering function, with an amount of attenuation of −60 dB or less and a slope characteristic of −5 dB/oct or less at a commercial frequency and detects a current flowing through a grounding conductor ( 5 ). The first amplifier ( 15 ) amplifies a current signal from the current transformer ( 7 a ). The first high-pass filter ( 17 ) removes a low frequency component from an amplified current signal. The low-pass filter ( 19 ) removes a high frequency component from a current signal from which the low frequency component has been removed. The second amplifier ( 20 ) amplifies a current signal from the low-pass filter ( 19 ) to a predetermined level. The second high-pass filter ( 21 ) extracts a signal corresponding to a discharge current caused by a partial discharge from the current signal amplified in the second amplifier ( 20 ). The discharge judgement section ( 30 ) judges whether or not a partial discharge has occurred in a cable ( 2 ) based on the signal extracted in the second high-pass filter ( 21 ).

26 citations

Journal ArticleDOI
01 Apr 2016
TL;DR: In this paper, the current magnitude and charge amount of a partial discharge (PD) in a gas-insulated switchgear (GIS) were estimated using a voltage probe installed on the outer surface of an insulation spacer.
Abstract: It is important to estimate the current magnitude and charge amount of a partial discharge (PD) in a gas-insulated switchgear (GIS). In this study, electromagnetic fields generated by a PD in an 84 kV-class three-phase GIS for testing have been measured with a voltage probe installed on the outer surface of an insulation spacer of the GIS tank, and the corresponding simulations have been carried out using the three-dimensional finite-difference time-domain (FDTD) method. FDTD-computed time-domain voltages across spacers agree reasonably well with the corresponding measured ones, and the current magnitude of PD and its charge amount have been estimated.

26 citations

Journal ArticleDOI
TL;DR: In this paper, an experimental setup is developed, based on partial discharge detection in a vacuum system, to characterize the partial discharge inception voltage of three coaxial cable designs in an argon and nitrogen environment at controllable pressure.
Abstract: Design of cables for operation in a low pressure environment is challenging, when applications also demand lightweight and flexibility, and material choice is restricted. The operating pressures in combination with relevant distances, can be situated near gas breakdown and cause partial discharges, making long-term damage conceivable. An experimental setup is developed, based on partial discharge detection in a vacuum system, to characterize the partial discharge inception voltage of three coaxial cable designs in an argon and nitrogen environment at controllable pressure. In order to cope with outgassing behavior, a lumped element model is presented to simulate the internal pressure distribution along the cable as a function of settling time. Microscopic cross sections of the cables are analysed with electrostatic voltage simulations. Using scaled Paschen curves, expected partial discharge inception is determined and compared with measurements. Quantifying cable performance, in terms of minimum PD inception voltage and pressure, in relation to its design is feasible, but also deviations occur which are discussed.

26 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023306
2022780
2021376
2020677
2019835
2018860