WO2009005223A1 - System and method for detecting partial discharge position - Google Patents

System and method for detecting partial discharge position Download PDF

Info

Publication number
WO2009005223A1
WO2009005223A1 PCT/KR2008/003229 KR2008003229W WO2009005223A1 WO 2009005223 A1 WO2009005223 A1 WO 2009005223A1 KR 2008003229 W KR2008003229 W KR 2008003229W WO 2009005223 A1 WO2009005223 A1 WO 2009005223A1
Authority
WO
WIPO (PCT)
Prior art keywords
partial discharge
signal
arrival time
signals
discharge position
Prior art date
Application number
PCT/KR2008/003229
Other languages
English (en)
French (fr)
Inventor
Sun-Geun Goo
Hyoung-Jun Ju
Jin-Yul Yoon
Ki-Sun Han
Ki-Jun Park
Original Assignee
Korea Electric Power Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Korea Electric Power Corporation filed Critical Korea Electric Power Corporation
Priority to JP2010514604A priority Critical patent/JP5165058B2/ja
Priority to DE112008001713.1T priority patent/DE112008001713B4/de
Priority to CN2008800230928A priority patent/CN101743484B/zh
Priority to GB1000898.5A priority patent/GB2463611B/en
Publication of WO2009005223A1 publication Critical patent/WO2009005223A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/129—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of components or parts made of semiconducting materials; of LV components or parts

Definitions

  • the present invention relates to a system and a method for monitoring an electric device, particularly which can detect a partial discharge position.
  • Schemes for estimating a partial discharge position are largely classified into one of using the attenuation of an electromagnetic discharge signal that is generated by the discharge and one of using a difference in arrival time of electromagnetic discharge signals at a partial discharge sensor.
  • FIG. 1 is a view for illustrating a method of detecting a partial discharge position according to the prior art.
  • an electric device for example, a gas insulated bus (GIB) 10 includes a central conductor 12, a box 14, and a plurality of partial discharge sensors 16.
  • the box 14 is insulated from and wraps around the central conductor 12.
  • the partial discharge sensors 16 detect the occurrence of partial discharge signals at the GIB 10.
  • a partial discharge sensor 16 which is positioned near a partial discharge position DP, may detect a strong partial discharge signal and another partial discharge sensor 16 that is far off the partial discharge position DP may detect a relatively weak partial discharge signal.
  • the position DP may be approximately estimated by performing the interpolation in a graph of position- signal strength of the partial discharge signals that are sensed by the partial discharge sensors 16.
  • FIG. 2 is a view for illustrating a method of detecting a partial discharge position using a difference in arrival time of an electromagnetic discharge signal at a partial discharge sensor according to the prior art.
  • the first and second partial discharge sensors 26 and 28 are mounted in an electric device under detection to estimate a partial discharge position.
  • the first and second partial discharge sensors 26 and 28 are spaced from each other by a predetermined interval Dt at the electric device.
  • a partial discharge When a partial discharge is created, its partial discharge signal is detected by the first and second partial discharge sensors 26 and 28, and its arrival time when the signal reaches the sensors 26 and 28 is calculated by a measurement unit 23.
  • the arrival time varies depending on the distance between the discharge sensors 16 and the position DP, and therefore, a first distance Dl between the first partial discharge sensor 26 and the position DP and a second distance D2 between the second discharge sensor 28 and the position DP may be calculated using the arrival time. Disclosure of Invention Technical Problem
  • the conventional methods described above require multiple partial discharge sensors for estimating the discharge position. Accordingly, the partial discharge sensors need to be installed sufficiently narrow between each other to be capable of detecting a weak discharge signal. This leads to a difficulty in installing such sensors, for example, in a complicated electric device.
  • An aspect of the present invention provides a system and a method of detecting a partial discharge position by employing a single partial discharge sensor.
  • Another aspect of the present invention provides a system and a method of detecting a partial discharge position, which are capable of improving the accuracy by employing a single partial discharge sensor.
  • An exemplary embodiment of the present invention provides a system of detecting a partial discharge position comprising: a partial discharge sensor detecting an electromagnetic partial discharge signal; a waveform monitoer measuring a waveform of a partial discharge signal detected by the partial discharge sensor; a conversion module converting the waveform and dividing the partial discharge signal according to each transmission mode; and a calculation module calculating a distance between the partial discharge sensor and the partial discharge position through an arrival time and a frequency of the divided partial discharge signal.
  • the conversion module may have an algorithm for simultaneously analyzing time and frequency.
  • the algorithm may comprise STFT (Short Time Fourier Transform) or WT (Wavelet
  • the calculation module may yield a group velocity of a signal for each transmission mode and calculate a distance between the partial discharge sensor and the partial discharge position through group velocities of signals of two transmission modes and a difference in arrival time of the two signals.
  • Another exemplary embodiment of the present invention provides a method of detecting a partial discharge position comprising: measuring a waveform of a partial discharge signal; converting the measured waveform and dividing the partial discharge signal according to each transmission mode; calculating a group velocity of a signal for each transmission mode through a frequency of the divided partial discharge signal; and calculating a partial discharge position through group velocities of two signal of two transmission modes and a difference in arrival time of the two signals.
  • Dividing the converted waveform may comprise dividing the partial discharge signal using an algorithm for simultaneously analyzing time and frequency.
  • Equation 1 The group velocity may be calculated from Equation 1 as below:
  • C refers to the speed of light
  • fc refers to a cutoff frequency of a signal of each mode
  • f ' refers to a frequency at an arrival time of the signal of corresponding mode.
  • Calculating a partial discharge position may comprise selecting a first transmission mode and a second transmission mode; calculating a difference in arrival time of two signals of the first and second transmission modes; and calculating a distance between the partial discharge sensor and the partial discharge position by entering the difference in arrival time and group velocities of the two signals at the arrival times in Equation 3 as below:
  • the present invention can provide further improved reliability in detecting a partial discharge position compared to conventional methods that employ a plurality of partial discharge sensors. [28] And, since a single partial discharge sensor is provided, costs can be saved.
  • FIGS. 1 and 2 are views for illustrating a method of detecting a partial discharge position according to the prior art
  • FIG. 3 is a view for illustrating a method of detecting a partial discharge position according to an exemplary embodiment of the present invention
  • FIG. 4 is a flowchart for illustrating a method of detecting a partial discharge position according to an exemplary embodiment of the present invention
  • FIG. 5 is a graph showing a waveform of a partial discharge signal
  • FIG. 6 is a graph showing a relationship between arrival time and frequency of a partial discharge signal.
  • FIG. 7 is a view showing a system of detecting a partial discharge position according to an exemplary embodiment of the present invention. Best Mode for Carrying Out the Invention
  • FIG. 3 is a view for illustrating a method of detecting a partial discharge position according to an exemplary embodiment of the present invention.
  • GEB gas insulation bus
  • an electromagnetic partial discharge signal is generated and propagates in summed one of various transmission modes, such as a transverse electric and magnetic (TEM) mode and transverse electric (TE) modes TEI l, TE21, TE31, and TE41.
  • TEM transverse electric and magnetic
  • TE transverse electric
  • the signals of transmission modes other than TEM mode have their own unique cutoff frequencies, and electromagnetic signals alone that have greater frequencies than such cutoff frequencies are transmitted in their corresponding modes.
  • the signal is transmitted at different speed depending on each mode, so that the time when a partial discharge sensor 36 detects the signal varies according to each mode. Accordingly, a distance L between the sensor 36 and the partial discharge position DP may be estimated through the arrival time for a signal of each mode.
  • a signal of TEM mode that is transmitted in the light speed C is firstly detected by the sensor 36. Then, signals of the other modes propagate at group velocities vg and detected by the sensor 36.
  • the detected discharge signals can be measured by a waveform monitor 38, such as oscilloscopes, and therefore, the distance L can be calculated from the measured values.
  • FIG. 4 is a flowchart for illustrating a method of detecting a partial discharge position according to an exemplary embodiment of the present invention
  • FIG. 5 is a graph showing a waveform of a partial discharge signal
  • FIG. 6 is a graph showing a relationship between arrival time and frequency of a partial discharge signal.
  • a waveform of a partial discharge signal detected by the sensor 36 is measured using the waveform monitor 38 (Step Sl).
  • the partial discharge signal is one synthesized from signals of various transmission modes as shown in FIG. 5.
  • a signal of TEM mode that has the fastest group velocity is detected at a first time point 52 in FIG. 5. Then, a signal of TEl 1 mode that has the second fastest group velocity is detected at a second time point 54 and synthesized with the signal of TEM mode.
  • the arrival times and frequencies of the signals can be more accurately calculated through a scheme that can analyze the signals according to arrival times and frequencies for respective modes.
  • Time Fourier Transform and WT (Wavelet Transform), can be introduced to analyze the partial discharge signals.
  • the relationship between frequency and time can be acquired by performing STFT on the measured partial discharge signals as shown in FIG. 6. It can be seen that the partial discharge signals may be divided with respect to each transmission mode by STFT.
  • a signal that arrives at a first time point 62 is one for TEM mode
  • a signal that arrives at a second time point 64 is one for TEl 1 mode, which is the second fastest signal except for the signal for TEM mode, wherein the frequency 66 of the signal for
  • TEI l mode is 668MHz.
  • Each group velocity is calculated using the arrival time and frequency for each signal for each transmission mode (Step S3).
  • the signal for TEM mode propagates in the light velocity C of light, and the group velocities vg of the signals other than the signal for TEM mode may be yielded from
  • fc refers to a cutoff frequency of each signal for each mode
  • f refers to each frequency of each signal for each mode at each arrival time
  • C refers to the light velocity
  • Equation 2 The difference ( ⁇ t) in arrival time can be expressed as Equation 2:
  • tl and t2 refers to the arrival time of signals for a first transmission mode and a second transmission mode, respectively
  • vgl and vg2 refer to the group velocities of the first transmission mode and the second transmission mode, respectively
  • L refers to a distance between the partial discharge sensor and discharge position (DP).
  • the discharge position DP is calculated through the group velocities and difference in arrival time between signals for two transmission modes (Step S4).
  • Equation 2 the difference in arrival time can be expressed by the group velocities and distance.
  • the distance L between the sensor 36 and the discharge position DP may be calculated by Equation 3 that is rewritten in terms of "L" from Equation 2.
  • the group velocity of the signal for each transmission mode can be calculated through the arrival time and the frequency at the arrival time of the partial discharge signal divided according to each transmission mode.
  • the distance between the partial discharge sensor and the partial discharge position DP can be calculated by entering the group velocity and difference in arrival time between signals of two transmission mode in a simple equation.
  • a distance L between the partial discharge sensor and the partial discharge position DP may be calculated using the difference in arrival time between the signal of TEM mode and the signal of TEl 1 mode and the group velocities.
  • a partial discharge position can be detected even with a single partial discharge sensor, so that some disadvantages, such as delays or deformations in signal and restrictions in measuring region, which can occur at existing methods that employ a plurality of partial discharge sensors, can be eliminated.
  • FIG. 7 is a view showing a system of detecting a partial discharge position according to an exemplary embodiment of the present invention.
  • a detection system 70 includes a partial discharge sensor 72, a waveform monitor 74, a conversion module 75, a calculation module 76, and a storage unit 78.
  • the partial discharge sensor 72 detects a partial discharge signal.
  • the waveform monitor 74 measures a waveform of the partial discharge signal detected by the partial discharge sensor 72.
  • the conversion module 75 performs a transform on the detected waveform and divides the transformed waveform according to each transmission mode.
  • the calculation module 76 calculates the distance between the partial discharge sensor 72 and a partial discharge position through a predetermined equation.
  • the storage unit 78 stores the equation therein.
  • the conversion module 75 has a conversion algorithm therein for converting a partial discharge signal in which various transmission modes are synthesized into a time- frequency distribution signal having high time and frequency resolution.
  • a conversion algorithm for converting a partial discharge signal in which various transmission modes are synthesized into a time- frequency distribution signal having high time and frequency resolution.
  • various conversion algorithms such as STFT (Short Time Fourier Transform) and WT (Wavelet Transform) may be embedded in the conversion module 75.
  • the partial discharge signals may be divided according to their arrival times and frequencies through the conversion algorithm. At this time, the arrival times and frequencies are different from one another according to transmission modes of the partial discharge signals, so that the divided signal can be correspondent to transmission modes.
  • the calculation module 76 receives frequencies and arrival time for two signals of two transmission modes from the conversion module 75 to calculate group velocities of the two signals, and estimates the distance between the partial discharge position and the partial discharge sensor 72 through the difference in arrival time and the group velocities.
  • the conversion module 45 and the calculation module 46 may be either programmed in a microprocessor or implemented with hardware.
  • the conversion module 45 and the calculation module 46 may be semiconductor chips or a single chip that can carry out their functions.
  • the storage unit 48 may be a memory that is separately mounted in the system or integrated with the conversion module 45 and/or the calculation module 46.
  • a single partial discharge sensor is provided to detect a partial discharge position.
  • a distance between the partial discharge sensor and the partial discharge position may be estimated through difference in arrival time and group velocities of partial discharge signals that are divided according to transmission modes.
  • the exemplary embodiments of the present invention can provide further improved reliability in detecting a partial discharge position compared to conventional methods that employ a plurality of partial discharge sensors.
PCT/KR2008/003229 2007-07-02 2008-06-10 System and method for detecting partial discharge position WO2009005223A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2010514604A JP5165058B2 (ja) 2007-07-02 2008-06-10 電力器機の部分放電位置検出システム及び放電位置検出方法
DE112008001713.1T DE112008001713B4 (de) 2007-07-02 2008-06-10 System und Verfahren zum Ermitteln der Position einer Teilentladung in einer elektrischen Einrichtung
CN2008800230928A CN101743484B (zh) 2007-07-02 2008-06-10 检测局部放电位置的系统和方法
GB1000898.5A GB2463611B (en) 2007-07-02 2008-06-10 System and method for detecting partial discharge position

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0066068 2007-07-02
KR1020070066068A KR100915712B1 (ko) 2007-07-02 2007-07-02 전력기기의 부분방전위치 검출시스템 및 방전위치 검출방법

Publications (1)

Publication Number Publication Date
WO2009005223A1 true WO2009005223A1 (en) 2009-01-08

Family

ID=40226228

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/003229 WO2009005223A1 (en) 2007-07-02 2008-06-10 System and method for detecting partial discharge position

Country Status (6)

Country Link
JP (1) JP5165058B2 (ja)
KR (1) KR100915712B1 (ja)
CN (1) CN101743484B (ja)
DE (1) DE112008001713B4 (ja)
GB (1) GB2463611B (ja)
WO (1) WO2009005223A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2992733A1 (fr) * 2012-06-28 2014-01-03 Labinal Dispositif et procede de surveillance d'un reseau electrique
WO2015058068A1 (en) * 2013-10-18 2015-04-23 Utilx Corporation Method and apparatus for measuring partial discharge charge value in frequency domain
EP3223025A4 (en) * 2014-11-21 2018-07-18 Mitsubishi Electric Corporation Partial discharge position location device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1394479B1 (it) 2009-05-29 2012-07-05 Techimp Technologies S A Ora Techimp Technologies S R L Strumento e procedimento di rilevazione di scariche elettriche parziali in un apparato elettrico.
CN102841294B (zh) * 2011-12-23 2015-02-11 湖北省电力公司电力科学研究院 电气设备特高频局部放电检测中信号与干扰的鉴别方法
CN103675610B (zh) * 2013-09-29 2016-06-15 国家电网公司 局部放电在线检测中的特征因子提取方法
KR101525329B1 (ko) * 2013-12-30 2015-06-03 한국원자력연구원 모드분리기법을 이용한 매설배관의 누설위치 추정방법
CN106249114A (zh) * 2016-08-23 2016-12-21 上海华乘智能设备有限公司 基于wifi传输的多功能带电检测装置及方法
CN112595934A (zh) * 2020-10-14 2021-04-02 浙江大有实业有限公司杭州科技发展分公司 一种高压电缆局部放电信号强度的测量方法及装置
CN113295933A (zh) * 2021-05-25 2021-08-24 云南电网有限责任公司电力科学研究院 一种雷电电磁波传播的群速度提取方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11271382A (ja) * 1998-01-26 1999-10-08 Mitsubishi Electric Corp 導電装置の部分放電発生位置検出装置及び部分放電強度検出装置
JP2000102159A (ja) * 1998-09-21 2000-04-07 Chubu Electric Power Co Inc ガス絶縁電気装置の異常診断方法及びその装置
KR20060048598A (ko) * 2004-06-29 2006-05-18 가부시키가이샤 니혼 에이이 파워시스템즈 부분방전검출센서, 부분방전검출장치 및부분방전검출센서를 가지는 가스절연 전기기기
KR20060072566A (ko) * 2004-12-23 2006-06-28 한국전기연구원 전력기기의 부분 방전 검출 및 처리 장치

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0750147B2 (ja) * 1989-06-14 1995-05-31 株式会社日立製作所 ガス絶縁電気機器の異常位置標定方法および装置
US6178386B1 (en) * 1998-08-14 2001-01-23 The University Of Hartford Method and apparatus for fault detection
US6161077A (en) * 1999-01-05 2000-12-12 Hubbell Incorporated Partial discharge site location system for determining the position of faults in a high voltage cable
CN1230684C (zh) * 2003-12-18 2005-12-07 西安交通大学 气体绝缘变电站高频宽带局部放电在线监测方法
CN1234014C (zh) * 2004-05-17 2005-12-28 西安交通大学 电力电缆局部放电在线监测方法及装置
JP2007114050A (ja) * 2005-10-20 2007-05-10 Tokyo Electric Power Co Inc:The 絶縁異常診断方法及びその装置
WO2007063647A1 (ja) * 2005-11-29 2007-06-07 Kyushu Institute Of Technology 部分放電電荷量測定方法および装置
CN100535677C (zh) * 2006-07-27 2009-09-02 华北电力大学 变压器局部放电超宽带传感器阵列定位系统及其方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11271382A (ja) * 1998-01-26 1999-10-08 Mitsubishi Electric Corp 導電装置の部分放電発生位置検出装置及び部分放電強度検出装置
JP2000102159A (ja) * 1998-09-21 2000-04-07 Chubu Electric Power Co Inc ガス絶縁電気装置の異常診断方法及びその装置
KR20060048598A (ko) * 2004-06-29 2006-05-18 가부시키가이샤 니혼 에이이 파워시스템즈 부분방전검출센서, 부분방전검출장치 및부분방전검출센서를 가지는 가스절연 전기기기
KR20060072566A (ko) * 2004-12-23 2006-06-28 한국전기연구원 전력기기의 부분 방전 검출 및 처리 장치

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2992733A1 (fr) * 2012-06-28 2014-01-03 Labinal Dispositif et procede de surveillance d'un reseau electrique
WO2014001466A1 (fr) * 2012-06-28 2014-01-03 Labinal Dispositif et procédé de surveillance d'un réseau électrique
US10120013B2 (en) 2012-06-28 2018-11-06 Safran Electrical & Power Device and method for monitoring an electrical network
WO2015058068A1 (en) * 2013-10-18 2015-04-23 Utilx Corporation Method and apparatus for measuring partial discharge charge value in frequency domain
EP3223025A4 (en) * 2014-11-21 2018-07-18 Mitsubishi Electric Corporation Partial discharge position location device

Also Published As

Publication number Publication date
KR100915712B1 (ko) 2009-09-04
CN101743484A (zh) 2010-06-16
GB2463611A (en) 2010-03-24
GB2463611B (en) 2012-10-03
CN101743484B (zh) 2012-11-21
DE112008001713T5 (de) 2010-06-10
GB201000898D0 (en) 2010-03-10
DE112008001713B4 (de) 2017-02-16
KR20090002588A (ko) 2009-01-09
JP2010531454A (ja) 2010-09-24
JP5165058B2 (ja) 2013-03-21

Similar Documents

Publication Publication Date Title
WO2009005223A1 (en) System and method for detecting partial discharge position
KR101022556B1 (ko) 고전압 전력기기용 극초단파 부분방전 어레이 센서 장치
CN101153890B (zh) 电力设备
KR20150037291A (ko) 부분 방전 분석 장치 및 방법
KR102089187B1 (ko) 전력케이블 접속함 진단 시스템 및 방법
US11204382B2 (en) Traveling wave based fault location using unsynchronized measurements for transmission lines
US20100010761A1 (en) Method and device for monitoring a system
CN111065932A (zh) 用于电力系统保护的使用失真进行的行波识别
KR101789577B1 (ko) 고전압 회전기 3상 고정자 권선의 활선 부분 방전 위치 측정장치
JP5719970B2 (ja) シンチレーション推定方法
US9651974B2 (en) Electrical power transmission line length measurement and average temperature estimation
CN111175609B (zh) 配电网线路故障定位方法及系统
KR101763347B1 (ko) 고장점 위치 측정 장치
US11726131B2 (en) Method for detecting an electrical discharge in an electrical apparatus and system therefor
CN108369254B (zh) 定位电力传输介质中的故障的方法
JP4353840B2 (ja) 電路の部分放電検出方法
KR102037082B1 (ko) 부분 방전 위치 추정 장치 및 방법
KR101031666B1 (ko) 부분 방전신호 검출장치 및 그 검출방법
KR101410735B1 (ko) 부분방전 반사파 검출 회피 방법
JP3756486B2 (ja) 電力機器の接触不良検出方法及びその装置
CN113009296A (zh) 一种基于单个局部放电传感器的高压电缆局部放电源点检测定位方法
KR101044895B1 (ko) 가스 절연 기기의 부분 방전 발생위치 추정 장치 및 방법
JP2019179010A (ja) パルス計測器およびパルス計測法
JP2001264378A (ja) 回転電機の部分放電計測方法
KR20040079050A (ko) 전력케이블에서의 부분방전 발생위치 측정시스템

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200880023092.8

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08766191

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2010514604

Country of ref document: JP

ENP Entry into the national phase

Ref document number: 1000898

Country of ref document: GB

Kind code of ref document: A

Free format text: PCT FILING DATE = 20080610

WWE Wipo information: entry into national phase

Ref document number: 1000898.5

Country of ref document: GB

RET De translation (de og part 6b)

Ref document number: 112008001713

Country of ref document: DE

Date of ref document: 20100610

Kind code of ref document: P

122 Ep: pct application non-entry in european phase

Ref document number: 08766191

Country of ref document: EP

Kind code of ref document: A1