KR20050074841A - Partial discharge localization system and method in power cables using signal attenuation - Google Patents
Partial discharge localization system and method in power cables using signal attenuation Download PDFInfo
- Publication number
- KR20050074841A KR20050074841A KR1020040002751A KR20040002751A KR20050074841A KR 20050074841 A KR20050074841 A KR 20050074841A KR 1020040002751 A KR1020040002751 A KR 1020040002751A KR 20040002751 A KR20040002751 A KR 20040002751A KR 20050074841 A KR20050074841 A KR 20050074841A
- Authority
- KR
- South Korea
- Prior art keywords
- partial discharge
- power cable
- signal
- reference signal
- measuring
- Prior art date
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
- G01R31/08—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
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Locating Faults (AREA)
Abstract
본 발명은 전력케이블을 따라 전달되는 신호의 감쇠 현상을 이용하여 전력케이블의 부분방전 발생위치를 측정하기 위한 것으로, 보다 자세하게는 전력케이블의 임의지점에 기준신호 입력수단을 통해 기준신호를 입력하고, 상기 전력케이블의 2이상의 지점에 설치되는 신호측정수단이 기준신호의 크기 및 부분방전신호의 크기를 측정하며, 상기 기준신호 입력단계 및 측정단계를 거쳐 전력케이블의 감쇠계수를 구하고, 이 감쇠계수 및 측정된 부분방전신호의 크기를 이용하여 실제 부분방전 위치를 알아내는 것을 특징으로 한다.The present invention is to measure the location of the partial discharge of the power cable by using the attenuation phenomenon of the signal transmitted along the power cable, and more specifically, input the reference signal through the reference signal input means at any point of the power cable, Signal measuring means installed at two or more points of the power cable measures the magnitude of the reference signal and the magnitude of the partial discharge signal, and obtains the attenuation coefficient of the power cable through the reference signal input step and the measurement step, The actual partial discharge position is determined by using the magnitude of the measured partial discharge signal.
Description
본 발명은 케이블을 따라 전달되는 신호의 감쇠현상을 이용하여 전력케이블의 부분방전 발생위치를 측정하는 전력케이블의 부분방전 위치 측정시스템 및 측정방법에 관한 것이다. The present invention relates to a system for measuring a partial discharge position of a power cable and measuring method for measuring a partial discharge occurrence position of a power cable using attenuation of a signal transmitted along a cable.
종래에는 전력케이블에서 부분방전 발생시 그 위치를 측정하기 위해서는 전력케이블의 한 쪽 끝에서 부분방전신호를 감지한 후, 다시 다른 쪽 끝단에서 반사되어 오는 신호가 감지될 때까지의 시간차를 측정하여 그 위치를 알아냈다.Conventionally, in order to measure the position of a partial discharge in a power cable, after detecting a partial discharge signal at one end of the power cable, the time difference is measured until the signal reflected from the other end is detected. Figured out.
즉, 먼저 감지된 부분방전신호는 가장 단거리로 이동하여 센서에 도달한 것이고, 나중에 감지된 신호는 다른 쪽 끝단까지 진행된 후 반사되어 오게 되므로, 두 신호간의 시간차를 이용하면 부분방전 발생위치를 알 수 있게 된다. That is, the first detected partial discharge signal moves to the shortest distance to reach the sensor, and the later detected signal travels to the other end and then is reflected. Therefore, if the time difference between the two signals is used, the position of the partial discharge can be known. Will be.
그러나, 이러한 부분방전 위치측정방식은 원래신호와 반사되어 오는 신호가서로 중첩되어 신호의 구별이 매우 어려울 뿐만 아니라, 신호의 반사 거리가 멀어지게 되면 신호의 감쇠현상에 의해 정확한 측정이 어려운 문제점이 있었다. However, in the partial discharge position measurement method, the original signal and the reflected signal overlap each other, so that it is difficult to distinguish the signal, and when the reflection distance of the signal becomes far, accurate measurement is difficult due to the attenuation of the signal. .
한편, 전력케이블의 부분방전 위치를 측정하기 위한 또 다른 방법으로는 케이블의 양쪽 끝단에서 부분방전신호를 검출하되, 양단에서의 신호 검출시까지 걸리는 시간차를 이용하여 부분방전 위치를 알아내기도 하였다.Meanwhile, as another method for measuring the partial discharge position of the power cable, the partial discharge signal is detected at both ends of the cable, and the partial discharge position is also determined by using the time difference until the signal is detected at both ends.
그러나, 이러한 측정방식은 전력케이블의 길이가 수백미터에 이르기 때문에, 그 양단에서 측정된 정확한 시간차를 알아내기 위해서는 동시에 두 신호를 측정하기 위한 동축케이블 또는 광케이블과 같은 전송장치가 요구되므로, 시설이 복잡하고 측정작업이 매우 번거로운 문제점이 있었다.However, this type of measuring method is complicated by the fact that since the length of the power cable reaches several hundred meters, a transmission device such as a coaxial cable or an optical cable for measuring two signals at the same time is required to determine the exact time difference measured at both ends. And the measurement work was very troublesome.
또한, 케이블이 관로 또는 직매방식으로 포설된 경우에는 이러한 방법으로는 측정이 불가능한 문제점이 있었다. In addition, when the cable is laid in a pipeline or direct sales method there was a problem that can not be measured by this method.
이에 본 발명은 상기와 같은 문제점들을 해소하기 위해 안출된 것으로써, 본 발명은 신호의 감쇠현상을 이용하여 신호의 간섭 없이 전력케이블의 부분방전위치를 정확하게 측정할 수 있는 신호감쇠를 이용한 전력케이블의 부분방전 위치 측정시스템 및 방법을 제공하는 것을 목적으로 한다.Therefore, the present invention has been made to solve the above problems, the present invention is to use the signal attenuation phenomenon of the power cable using the signal attenuation that can accurately measure the partial discharge position of the power cable without interference of the signal It is an object to provide a partial discharge position measurement system and method.
또한, 본 발명은 간소화된 시스템에 의해서도 간편하고 정확하게 부분방전위치를 측정할 수 있는 것을 목적으로 한다. In addition, an object of the present invention is to be able to measure the partial discharge position simply and accurately by a simplified system.
상기와 같은 목적을 달성하기 위한 본 발명은 전력케이블의 부분방전 위치를 측정하기 위한 시스템에 있어서, In the present invention for achieving the above object, in the system for measuring the partial discharge position of the power cable,
상기 전력케이블의 임의지점에 설치되어 전력케이블에 기준신호를 입력하는 기준신호 입력수단과; 상기 전력케이블의 2이상의 지점에 설치되며 전력케이블을 따라 전달되어 오는 기준신호의 크기 및 부분방전 위치에서 전달되어 오는 부분방전신호의 크기를 각각 측정하는 2이상의 신호측정수단을 포함하여 구성된 것을 특징으로 하는 신호감쇠를 이용한 전력케이블의 부분방전위치 측정시스템을 제공한다. Reference signal input means installed at an arbitrary point of the power cable to input a reference signal to the power cable; It is installed at two or more points of the power cable, characterized in that configured to include two or more signal measuring means for measuring the magnitude of the reference signal transmitted along the power cable and the magnitude of the partial discharge signal transmitted from the partial discharge position, respectively It provides a partial discharge position measurement system of a power cable using a signal attenuation.
또한, 본 발명은 전력케이블의 부분방전 위치를 측정하기 위한 방법에 있어서,In addition, the present invention provides a method for measuring the partial discharge position of the power cable,
상기 전력케이블의 임의지점에 기준신호를 입력하는 기준신호 입력단계와; 상기 전력케이블의 2이상의 지점으로 전달되어 오는 기준신호의 크기를 측정하는 기준신호 측정단계와; 상기 전력케이블의 2이상의 지점으로 전달되어 오는 부분방전신호의 크기를 측정하는 부분방전신호 측정단계를 포함하며; 상기 기준신호 입력단계 및 측정단계를 거쳐 전력케이블의 감쇠계수를 구하고, 이 감쇠계수 및 측정된 부분방전신호의 크기를 이용하여 실제 부분방전 위치를 알아낼 수 있도록 된 것을 특징으로 하는 신호감쇠를 이용한 전력케이블의 부분방전위치 측정방법을 제공한다. A reference signal input step of inputting a reference signal at an arbitrary point of the power cable; A reference signal measuring step of measuring a magnitude of a reference signal transmitted to two or more points of the power cable; A partial discharge signal measuring step of measuring the magnitude of the partial discharge signal transmitted to two or more points of the power cable; The power using signal attenuation, characterized by obtaining the attenuation coefficient of the power cable through the reference signal input step and the measurement step, and using the attenuation coefficient and the magnitude of the measured partial discharge signal to determine the actual partial discharge position Provides a method for measuring the partial discharge position of a cable.
이하, 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
도 1은 본 발명에 따른 전력케이블의 부분방전 위치 측정시스템의 구성도이다.1 is a block diagram of a system for measuring a partial discharge position of a power cable according to the present invention.
도시된 바와 같이, 상기 측정시스템은 전력케이블(10)의 임의지점에 설치되는 기준신호 입력수단(20)과, 상기 전력케이블(10)의 2이상의 지점에 설치되는 신호측정수단(30)으로 이루어진다. As shown, the measurement system comprises a reference signal input means 20 is installed at any point of the power cable 10, and a signal measuring means 30 is installed at two or more points of the power cable 10. .
상기 기준신호 입력수단(20)은 전력케이블(10)의 감쇠계수를 구하기 위한 것으로, 측정하고자 하는 전력케이블(10)의 임의의 지점에 설치되어 이 전력케이블(10)에 기준신호를 주입하는 칼리브레이터(calibrator)가 이용된다. The reference signal input means 20 is for obtaining the attenuation coefficient of the power cable 10, which is installed at an arbitrary point of the power cable 10 to be measured and injects a reference signal into the power cable 10. A calibrator is used.
상기 신호측정수단(30)은 전력케이블(10)의 2이상의 지점에 설치되어 전력케이블(10)을 통해 전달되어 오는 신호의 크기를 측정하는 것으로, 기준신호 입력시에는 전력케이블(10)을 따라 전달되어 오는 기준신호의 크기를 측정하고, 실제 부분방전 위치(P)를 파악하고자 할 때에는 부분방전신호의 크기를 각각 측정하여 디스플레이하게 된다.The signal measuring means 30 is installed at two or more points of the power cable 10 to measure the size of the signal transmitted through the power cable 10, and when the reference signal is input along the power cable 10 In order to measure the magnitude of the reference signal transmitted and to determine the actual partial discharge position P, the magnitude of the partial discharge signal is measured and displayed.
또한, 이 신호측정수단(30)은 예상되는 부분방전 위치(P)의 양쪽에 위치되도록 설치됨이 계산에 의해 정확한 부분방전 위치(P)를 파악할 수 있어 바람직하다. In addition, it is preferable that the signal measuring means 30 is installed to be located at both sides of the expected partial discharge position P, so that the accurate partial discharge position P can be grasped by calculation.
이상의 측정시스템을 이용하여 부분방전 위치를 측정하는 방법은, 먼저, 측정하고자 하는 전력케이블(10)의 임의지점에 기준신호 입력수단(20)인 칼리브레이터(calibrator)를 통해 기준신호를 입력함과 더불어, 이 전력케이블(10)의 2이상의 지점에는 신호측정수단(30)을 설치하여 전력케이블(10)을 통해 전달되어 오는 기준신호의 크기를 각각 측정한다.In the method for measuring the partial discharge position using the above measurement system, first, a reference signal is input to an arbitrary point of the power cable 10 to be measured through a calibrator, which is a reference signal input means 20. In addition, the signal measuring means 30 is installed at two or more points of the power cable 10 to measure the magnitude of the reference signal transmitted through the power cable 10, respectively.
이어서, 측정된 기준신호의 크기 차이(dB)를 상기 기준신호 입력수단(20)으로부터 각각의 신호측정수단(30)까지의 거리 차이(m)로 나누게 되면 상기 전력케이블(10)의 신호에 대한 감쇠계수(dB/m)가 구해지게 된다. Subsequently, when the magnitude difference (dB) of the measured reference signal is divided by the distance difference (m) from the reference signal input means 20 to each signal measuring means 30, the signal of the power cable 10 The attenuation coefficient (dB / m) is obtained.
그리고, 상기 전력케이블(10)을 통해 전달되어 오는 실제 부분방전신호의 크기를 상기 신호측정수단(30)을 통해 측정한다.In addition, the magnitude of the actual partial discharge signal transmitted through the power cable 10 is measured by the signal measuring means 30.
이와 같이, 측정된 신호의 크기는 그 차이(b dB)를 상기 감쇠계수(a)로 나누어서, 그 절반에 해당되는 값(b/2a)을 구하면, 이 값이 부분방전 위치를 나타내게 된다.In this way, the magnitude of the measured signal is obtained by dividing the difference (b dB) by the attenuation coefficient (a) and obtaining a value (b / 2a) corresponding to that half, and this value represents the partial discharge position.
즉, 상기 부분방전이 발생되는 위치는 양측 신호측정수단(30)의 가운데 지점으로부터 신호가 더 큰쪽으로 구해진 값(b/2a)만큼 편심된 거리에 위치됨을 나타낸다. That is, the position where the partial discharge is generated indicates that the signal is located at an eccentric distance from the center point of both signal measuring means 30 by a value (b / 2a) obtained from the larger side.
이상에서와 같은 본 발명에 의하면, 종래와 같이 부분방전신호와 반사되어 오는 신호간의 간섭현상이 없어 전력케이블의 부분방전 위치를 정확하게 파악할 수 있음은 물론, 기준신호 입력수단과 신호측정수단만 구비되면 간편하게 부분방전 위치를 파악할 수 있어 시스템이 매우 간소화되고 측정이 매우 간편한 이점이 있다. According to the present invention as described above, since there is no interference phenomenon between the partial discharge signal and the reflected signal as in the prior art, it is possible to accurately grasp the partial discharge position of the power cable, as well as the reference signal input means and the signal measuring means. The location of the partial discharge can be easily determined, which greatly simplifies the system and makes the measurement very easy.
도 1은 본 발명에 따른 전력케이블의 부분방전 위치 측정시스템의 구성도.1 is a configuration diagram of a partial discharge position measuring system of a power cable according to the present invention.
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
10 : 전력케이블 20 : 기준신호 입력수단10: power cable 20: reference signal input means
30 : 신호측정수단 P : 부분방전 위치30: signal measuring means P: partial discharge position
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040002751A KR20050074841A (en) | 2004-01-14 | 2004-01-14 | Partial discharge localization system and method in power cables using signal attenuation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040002751A KR20050074841A (en) | 2004-01-14 | 2004-01-14 | Partial discharge localization system and method in power cables using signal attenuation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20050074841A true KR20050074841A (en) | 2005-07-19 |
Family
ID=37263327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020040002751A KR20050074841A (en) | 2004-01-14 | 2004-01-14 | Partial discharge localization system and method in power cables using signal attenuation |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20050074841A (en) |
-
2004
- 2004-01-14 KR KR1020040002751A patent/KR20050074841A/en not_active Application Discontinuation
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2587238B1 (en) | Optical fibre temperature distribution measurement apparatus | |
| US7769252B2 (en) | Location marker for distributed temperature sensing systems | |
| CN102739311B (en) | Fiber failure positioner and localization method thereof based on chaos visible laser | |
| JP4008470B2 (en) | Measuring method and apparatus for measuring polarization mode dispersion of optical fiber | |
| RU2656295C1 (en) | Method of route search and determining place of optical cable fault | |
| WO2020168833A1 (en) | Optical fiber monitoring method and device | |
| NO20131605A1 (en) | Optical network configuration with inherent delay for wavelength sweeping interference measurement systems. | |
| CN101794506B (en) | Method and device used for data calibration in distributed type optical fiber temperature sensor | |
| CN111765958A (en) | Vibration type identification method and system based on distributed optical fiber vibration radial distance measurement | |
| US20190063982A1 (en) | Tdr fill level measuring device and method for operating a tdr fill level measuring device | |
| CN103353359A (en) | Distributed temperature-sensitive optical fiber one-point calibration method | |
| CN109425375A (en) | Fiber sensor measuring device | |
| JPH03120437A (en) | Method and device for measuring strain or temperature of optical waveguide | |
| JP6283602B2 (en) | Optical fiber bending shape measuring apparatus and bending shape measuring method thereof | |
| KR20050074841A (en) | Partial discharge localization system and method in power cables using signal attenuation | |
| US11946824B2 (en) | Methods for determining sensor channel location in distributed sensing of fiber-optic cables | |
| CN109060191A (en) | A kind of optical fiber temperature measurement system parameter calibration method, device and parameter system | |
| CN205607564U (en) | Eliminate distributed optical fiber temperature sensing device of 1XN photoswitch influence | |
| CN103808491B (en) | Self-adaptation high-precision optical fiber trouble point checking method | |
| CN210327579U (en) | Optical cable vibrating positioning device | |
| WO2020158438A1 (en) | Optical fiber route search method, optical fiber route search device and program | |
| JP5562141B2 (en) | Optical pulse test method and optical pulse test apparatus | |
| JPH0712655A (en) | Measurement system | |
| CN203224310U (en) | Brillouin optical time domain reflectometer | |
| JP6706192B2 (en) | Propagation delay time difference measuring method between spatial channels and propagation delay time difference measuring apparatus between spatial channels |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application |