• Title/Summary/Keyword: HFCT sensor

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Comparison test for PD measuring about UHF-sensor and HFCT-sensor in cable joint-box of MV grade (MV급 케이블 중간접속부의 PD 측정을 위한 UHF-센서와 HFCT-센서의 비교시험)

  • Shin, Dong-Hoon;Lee, Yong-Sung;Kim, Jung-Yoon;Yang, Jong-Seok;Park, Noh-Joon;Park, Dae-Hee
    • Proceedings of the KIEE Conference
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    • 2006.07c
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    • pp.1511-1512
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    • 2006
  • In this paper, we measured PD signals from artificial surface defects and corona discharges under laboratory circumstances like the fields using both HFCT-sensor and UHF-sensor for MV grade XLPE cable with AMP, spectrum analyzer and oscilloscope. Also, detected signals were analyzed via PRPDA system in this paper. As a result, in this case of HFCT-sensor, the amount of background noise are larger than as compared to UHF-sensor. There is needed some hardware or software or software algorithm removing background noise effectively for diagnosis the underground power transmission cable in the case of HFCT-sensor.

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A Study on the Development and Characteristics Evaluation of Non-Contact HFCT Sensor for Partial Discharge Measurement (부분방전 측정용 비접촉식 HFCT 센서개발 및 특성평가에 관한 연구)

  • Sang-Bo Han
    • Journal of IKEEE
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    • v.28 no.2
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    • pp.131-135
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    • 2024
  • In this study, the sensor such as current transformer type was developed for measuring non-contact partial discharge in power electrical facilities, and the results of the characteristic evaluation were discussed. The frequency response characteristics of the HFCT sensor were shown to be measurable from 20 [kHz] to 20 [MHz]. The average sensitivity for the positive direction was 0.308 [mV/pC], and the negative direction was 0.459 [mV/pC]. Which showed that the sensitivity for the negative direction was better than that for the positive direction. The developed HFCT sensor is possible to measure very small partial discharge pulse signals and can be measured various types of partial discharge that may occur at power electrical facilities.

Korean Institute of Electrical and Electronic Materials (XLPE 전력케이블의 부분방전 측정을 위한 평면 루프 센서 설계에 관한 연구)

  • Lim, Kwang-Jin;Yang, Sang-Hyun;Lwin, Kyaw-Soe;Park, Noh-Joon;Park, Dae-Hee
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2008.04c
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    • pp.27-31
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    • 2008
  • In this study, The new type of loop antenna which detects the partial discharge was designed based on microstrip line technology. In diagnosis of power cable, partial discharge signal generally occurred at the frequency range lower than 100MHz because high frequency PD signals could be lost along the propagation path in the cable. The new type of loop antenna sensor has been studied by using Simulation software named CST microwave studio version 5.0. In partial discharge measuring experiments, commercial HFCT sensor was used as a reference sensor. Several experiments were made over HFCT sensor and loop antenna sensor in detection partial discharge on MV XLPE cable of 22.9kV. In this study, we have shown our loop antenna sensor can apply as a commercial HFCT sensor.

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A Study on the Design of a Planar Loop Sensor for Partial Discharge Diagnosis of 22.9 kV XLPE Power Cables

  • Lim, Kwang-Jin;Yang, Sang-Hyun;Shin, Dong-Hoon;Park, Noh-Joon;Park, Dae-Hee
    • Journal of Electrical Engineering and Technology
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    • v.3 no.4
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    • pp.559-565
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    • 2008
  • This study designed a new type of loop antenna that is able to detect partial discharges based on microstrip line technology. In the diagnosis of power cables, partial discharge signals are generally produced at a frequency range less than 100MHz because high frequency PD signals are lost along a propagation path in such cables. The new type of loop antenna sensor has been studied using simulation software known as CST microwave studio version 5.0. In partial discharge measurement experiments, a commercial HFCT sensor was used as a reference sensor. Several experiments were made over HFCT and loop antenna sensors for detecting partial discharges on 22.9kV MV XLPE cable. In this study, we showed the loop antenna designed in this study that can be applied as a commercial HFCT sensor.

New Method of PD measuring on MV XLPE Cable by Using Prototype Patch Antenna (Prototype 패치 안테나를 이용한 MV급 전력케이블의 부분방전 측정 연구)

  • Lwin, K.S.;Shin, D.H.;Lim, K.J.;Kong, T.S.;Kim, H.D.;Park, N.J.;Park, D.H.
    • Proceedings of the KIEE Conference
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    • 2007.04b
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    • pp.146-148
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    • 2007
  • We studied the partial discharge detecting by sensing electromagnetic wave emitted from the partial discharge source in the MV XLPE cable with the new type of patch antenna sensor. In this study, we design new kind of Patch antenna and make many experiments compare with the existing HFCT sensor on MV XLPE cable in the laboratory. According to our experimental results our new sensor can defect pure PD and wider bandwidth 20MHz to 70MHz than HFCT and can easily localized manually on the cable.

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A Study of the Noise Discrimination by use of Different Sensors and Pulse Analysis Algorithms in Measuring Partial Discharge (부분방정 측정에서 센서 및 펄스 분석 알고리즘에 따른 노이즈 제거 연구)

  • Kim, Ji-Hong;Koo, Ja-Yoon;Kim, Jeong-Tae
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.55 no.4
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    • pp.183-188
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    • 2006
  • Abstract - In order to investigate the possibility of separating PD(partial discharge) and noises through the pulse analysis by use of a HFCT, pulse shapes measured by a resistive sensor and a HFCT were analyzed and adequate PA(pulse analysis) algorithms were studied. For the purpose, the HFPD detection and PA system has been developed. Also void discharges and air corona were adopted as the artificial defect and noises, respectively. As a result, it is possible to separate partial discharges and noises through the PA method using the $100kHz{\sim}20MHz$ frequency range HFCT. It is expected to apply the developed system to on-site PD measurements for the electric equipments.

The Design and Experiment of a Planar Patch Sensor for Partial Discharge Diagnostics in 6.6 kV Rotating Machine Stator Windings

  • Yang, Sang-Hyun;Park, Noh-Joon;Park, Dae-Hee;Kim, Hee-Dong;Lim, Kwang-Jin
    • Transactions on Electrical and Electronic Materials
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    • v.10 no.5
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    • pp.173-176
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    • 2009
  • In the stator windings of a 6.6 kV rotating machine, internal discharges, slot discharges, and surface discharges are mainly caused by internal voids and insulation degradation. If a partial discharge(PD) occurs in an inner-part of the stator windings, it will cause electromagnetic pulses with wide frequency ranges. Discharge sparks and electromagnetic pulses generated from a discharge source, can be detected using various RF resonators like an EM sensor. In order to detect these types of electromagnetic sources, a planar patch sensor was designed and fabricated using a CST-MWS simulation, and PD signals from an artificially defected stator winding were also measured by the sensor proposed in this study. Furthermore, an HFCT was used as a reference sensor and compared with the proposed new planar patch sensor. In the results of the experiment, the planar patch sensor showed a similar performance to the HFCT sensor.

회전기 고정자권선의 부분방전 진단용 평면 패치센서의 설계 및 실험

  • Yang, Sang-Hyeon;Park, No-Jun;Kim, Chung-Sik;Park, Dae-Hui
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.11a
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    • pp.228-228
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    • 2009
  • In stator windings of a 6.6kV rotating machine, internal discharge, corona discharge, and surface discharge are mainly caused by internal voids and insulation degradation. In the case of the discharge spark and electromagnetic pulse generated from a discharge source, we can detect it using various RF resonators like an EM sensor. In order to detect these types of electromagnetic sources, we designed and fabricated a planar patch sensor using a CST-MWS simulation, and PD signals from artificial defected stator windings were also measured by the sensor proposed in this study. Furthermore, In the results of the experiment, it showed similar performance to the HFCT sensor.

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Detection and localization of partial discharge in high-voltage direct current cables using a high-frequency current transformer (HFCT를 활용한 고전압직류송전 케이블 부분방전 위치추정)

  • Hong, Seonmin;Son, Wooyoung;Cheon, Hyewon;Kang, Daekyoung;Park, Jonghoo
    • Journal of Sensor Science and Technology
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    • v.30 no.2
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    • pp.105-108
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    • 2021
  • Detection and localization of partial discharge are considered critical techniques for estimating the lifetimes of power cables. High-frequency current transformers (HFCTs) are commonly used for the detection of partial discharge in high-voltage alternating current (HVAC) power cables; however, their applicability is compromised by the limitations of the installation locations. HFCTs are typically installed in cable terminals or insulation joint boxes because HVACs induce strong time-varying magnetic fields around the cables, saturating the ferromagnetic materials in the HFCTs. Therefore, partial discharges near the installation locations can be detected. In this study, the feasibility of partial discharge detection using a HFCT was investigated for high-voltage direct current (HVDC) cables. We demonstrated that the HFCT could be installed at any location in the HVDC power cable to monitor partial discharge along the entire cable length. Furthermore, we showed that the HFCT could detect the location of partial discharge with high accuracy.

PD Diagnosis on High Voltage Rotating by Using New Prototype Patch Antenna Sensor (prototype 패치 안테나를 이용한 고압 회전기의 부분방전 측정 연구)

  • Lwin, K.S.;Shin, D.H.;Lim, K.J.;Kong, T.S.;Kim, H.D.;Park, N.J.;Park, D.H.
    • Proceedings of the KIEE Conference
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    • 2007.04b
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    • pp.169-171
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    • 2007
  • We studied the partial discharge detecting by sensing electromagnetic wave emitted from the partial discharge source in the HV Rotating Machine with the new prototype patch antenna sensor. In this study, we design new type of patch antenna based on microstrip technology and make many experiments of elaine testing compare with the existing HFCT and EM probe on stator winding of HV generator in the laboratory. This paper will mention comparison of experimental results based on the three kinds of sensors.

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