KR20070074321A - Arrester diagnosis technique and device by measurement of temperature - Google Patents

Arrester diagnosis technique and device by measurement of temperature Download PDF

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KR20070074321A
KR20070074321A KR1020060002313A KR20060002313A KR20070074321A KR 20070074321 A KR20070074321 A KR 20070074321A KR 1020060002313 A KR1020060002313 A KR 1020060002313A KR 20060002313 A KR20060002313 A KR 20060002313A KR 20070074321 A KR20070074321 A KR 20070074321A
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South Korea
Prior art keywords
arrester
temperature
leakage current
ambient temperature
diagnosing
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KR1020060002313A
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Korean (ko)
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KR100755043B1 (en
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길경석
한주섭
송재용
김일권
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길경석
송재용
한주섭
김일권
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    • 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
    • G01R31/1236—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 surge arresters
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
    • H02G13/80—Discharge by conduction or dissipation, e.g. rods, arresters, spark gaps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/048—Checking overvoltage diverters

Abstract

A method and an apparatus for diagnosing an arrester through temperature measurement are provided to improve safety of diagnosis of the arrester by diagnosing the arrester through the temperature measurement without approaching a high voltage electric circuit. An apparatus for diagnosing an arrester through temperature measurement includes an input unit(100), an arrester temperature measuring unit(200), a surrounding temperature measuring unit(300), a central processing unit(400), and a display unit(500). The input unit(100) inputs a driving command for diagnosing the arrester. The arrester temperature measuring unit(200) measures a surface temperature of the arrester and outputs the measured result as a digital signal. The surrounding temperature measuring unit(300) measures a surrounding temperature of the arrester and outputs the measured result as the digital signal. The central processing unit(400) receives the digital signals from the arrester temperature measuring unit(200) and the surrounding temperature measuring unit(300). The central processing unit(400) calculates a state size for a normal leakage current from a temperature difference of the calculated surface temperature and surrounding temperature of the arrester. The central processing unit(400) diagnoses a state of the arrester and outputs the diagnosed data. The display unit(500) displays the diagnosed data outputted from the central processing unit(400).

Description

온도측정에 의한 피뢰기 진단기술 및 장치 {Arrester Diagnosis Technique and Device by Measurement of Temperature}Arrester Diagnosis Technique and Device by Measurement of Temperature

도 1은 본 발명에 따른 온도측정에 의한 피뢰기 진단장치를 도시한 블록도이고,1 is a block diagram showing an arrester diagnostic device by the temperature measurement according to the present invention,

도 2는 본 발명에 따른 옥도측정에 의한 피뢰기 진단방법의 수행과정을 나타낸 개략적인 흐름도이고, 2 is a schematic flowchart showing a process of performing the arrester diagnosis method by measuring the degree of inoculation according to the present invention;

도 3은 본 발명에 따른 주위온도에 대한 피뢰기의 누설전류의 변화를 나타낸 그래프이고,3 is a graph showing a change in the leakage current of the arrester against the ambient temperature according to the present invention,

도 4는 본 발명의 누설전류 변화에 따른 주위온도와 피뢰기표면온도의 관계를 나타낸 그래프이고,4 is a graph showing the relationship between the ambient temperature and the lightning arrester surface temperature according to the leakage current change of the present invention,

도 5는 본 발명에 따른 온도차와 누설전류와의 관계를 나타낸 그래프이다.5 is a graph showing the relationship between the temperature difference and the leakage current according to the present invention.

* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

10: 피뢰기 100: 입력수단10: lightning arrester 100: input means

200: 피뢰기온도측정수단 300: 표면온도측정수단200: lightning arrester temperature measuring means 300: surface temperature measuring means

400: 중앙처리부 500: 표시수단400: central processing unit 500: display means

600: 통신드라이버600: communication driver

본 발명은 피뢰기 진단에 관한 것으로, 보다 상세하게는 온도측정을 통해 피뢰기를 진단함으로서, 전기적 신호를 사용하지 않으므로 전원고조파와 주변전자계에 의한 측정오차를 최소화하여 좀 더 정밀한 진단데이터를 얻고, 피뢰기를 진단하기 위해 고전압 전기회로에 접근할 필요가 없으므로 피뢰기 진단의 안전성을 향상시킬 수 있는 온도측정에 의한 피뢰기 진단기술 및 장치에 관한 것이다. The present invention relates to a lightning arrester, and more particularly, by diagnosing the arrester through temperature measurement, since the electrical signal is not used, the measurement error caused by the power harmonics and the surrounding electromagnetic field is minimized to obtain more accurate diagnostic data. The present invention relates to a lightning arrester diagnosis technology and apparatus by temperature measurement which can improve the safety of the arrester diagnosis since there is no need to access a high voltage electric circuit for diagnosis.

일반적으로, 전력계통에는 외부의 낙뢰와 내부의 각종 과도전압으로부터 선로 및 기기를 보호하기 위한 장치로서 피뢰기가 설치되어 있다. In general, a lightning arrester is installed in a power system as a device for protecting a line and a device from external lightning and various internal transient voltages.

피뢰기는 전력계통에 발생하는 이상전압을 설계 절연레벨 이하로 억제시켜 선로 및 기기를 안전하게 보호하는 장치이다. 그러나 피뢰기는 사용 중 상용주파수 과전압에 의해 열화가 진전되며, 열화된 피뢰기는 정상운전 상태에서도 일선지락과 같은 정전사고를 발생시킬 수 있으므로, 전력공급의 신뢰성, 안정성 확보를 위하여 전력계통에 설치된 피뢰기의 상태를 상시 진단하고, 이들 정보로부터 열화된 피뢰기를 대체하는 등의 관리수단이 필요하다.The arrester is a device to protect the line and equipment by suppressing the abnormal voltage occurring in the power system below the design insulation level. However, the arrester is deteriorated due to the commercial frequency overvoltage during use, and the deteriorated arrester may cause a power failure such as a ground fault in the normal operation state, so that the arrester installed in the power system is secured to ensure the reliability and stability of the power supply. There is a need for management means such as diagnosing the condition at all times and replacing deteriorated lightning arresters from these information.

이에, 전력계통에서 피뢰기로 인한 사고를 줄이기 위하여 운전 중 피뢰기의 열화를 진단할 수 있는 여러 가지 기술들이 연구되어 왔으며, 주로 누설전류 측정 에 근거하였다. 즉, 기존에는 오프라인 상태에서 피뢰기의 정전용량, 동작개시전압, 누설전류를 측정하거나 온라인 상태에서 운전 중 피뢰기를 흐르는 전체누설전류, 제3고조파 누설전류의 크기를 측정하여 진단하는 방법이 사용되어 왔다.Therefore, various techniques for diagnosing the deterioration of the arrester during operation have been studied in order to reduce the accidents caused by the arrester in the power system, mainly based on the leakage current measurement. That is, in the past, a method of measuring the capacity of the arrester in the off-line state, operating start voltage and leakage current, or measuring the magnitude of the total leakage current and the third harmonic leakage current flowing through the arrester while in the on-line state has been used. .

그러나, 이와 같은 종래의 기술은 전력계통과 같이 전원고조파가 많거나 고전자계 상태에서는 진단시 큰 오차를 발생하였다. 또한 피뢰기 진단시 고전압으로부터의 감전에 쉽게 노출되는 문제점이 있었다.However, such a conventional technique has a large error in diagnosis in a state where there are many power harmonics or high magnetic fields, such as a power system. In addition, there was a problem in that the lightning arrester is easily exposed to electric shock from high voltage.

따라서, 본 발명의 목적은 상기와 같은 종래기술의 제반 문제점을 해결하기 위한 것으로 온도측정을 통해 피뢰기를 진단함으로서, 전기적 신호를 사용하지 않으므로 전원고조파와 주변전자계에 의한 측정오차를 최소화하여 좀 더 정밀한 진단데이터를 얻고, 피뢰기를 진단하기 위해 고전압 전기회로에 접근할 필요가 없으므로 피뢰기 진단의 안전성을 향상시킬 수 있는 온도측정에 의한 피뢰기 진단장치를 제공하는 데 있다.Accordingly, an object of the present invention is to solve the above problems of the prior art, and by diagnosing the arrester through temperature measurement, since the electrical signal is not used, the measurement error caused by the power harmonics and the surrounding electromagnetic field is more precise. In order to obtain the diagnostic data and to access the high voltage electric circuit to diagnose the arrester, there is provided a lightning arrester diagnosis apparatus based on temperature measurement that can improve the safety of the arrester diagnosis.

상기 목적을 달성하기 위한 본 발명의 기술적 수단은, 피뢰기 진단장치에 있어서: 피뢰기를 진단하기 위한 구동명령을 입력하는 입력수단; 상기 피뢰기의 표면온도를 측정하여 디지털신호로 출력하는 피뢰기온도측정수단; 상기 피뢰기의 주위온도를 측정하여 디지털신호로 출력하는 주위온도측정수단; 상기 피뢰기온도측정수 단과 주위온도측정수단으로부터 디지털신호를 인가받아, 계산한 피뢰기의 표면온도와 주위온도의 온도차로부터, 정상누설전류에 대한 상태크기를 산출하여 상기 피뢰기의 상태를 진단하고 진단데이터를 출력하는 중앙처리부; 및 상기 중앙처리부로부터 인가받은 진단데이터를 화면으로 출력하는 표시수단; 으로 구성된 것을 특징으로 한다.Technical means of the present invention for achieving the above object, the arrester diagnostic apparatus comprising: input means for inputting a drive command for diagnosing the arrester; Lightning arrester temperature measuring means for measuring the surface temperature of the arrester and outputting it as a digital signal; Ambient temperature measuring means for measuring the ambient temperature of the arrester and outputting it as a digital signal; A digital signal is applied from the arrester temperature measuring means and the ambient temperature measuring means, and the state size of the normal leakage current is calculated from the calculated temperature difference between the surface temperature of the arrester and the ambient temperature to diagnose the state of the arrester and obtain diagnostic data. A central processing unit for outputting; And display means for outputting diagnostic data received from the central processing unit to a screen. Characterized in that consisting of.

상기 피뢰기온도측정수단은 비접촉식 온도측정수단이고, 상기 중앙처리부를 통해 진단한 피뢰기의 진단데이터를 유선 또는 무선으로, 소정의 장치에 전달하는 통신드라이버를 구비한 것을 특징으로 한다.The lightning arrester temperature measuring means is a non-contact temperature measuring means, characterized in that it comprises a communication driver for transmitting the diagnostic data of the arrester diagnosed through the central processing unit, by wire or wireless, to a predetermined device.

상기 목적을 달성하기 위한 본 발명의 다른 기술적 수단은 피뢰기의 상태를 진단하는 방법에 있어서: 주위 온도에 따른 피뢰기의 누설전류의 변화를 분석하는 1단계; 상기 누설전류에 따른 상기 피뢰기의 표면온도와 주위온도의 관계를 분석하는 2단계; 상기 피뢰기의 표면온도와 주위온도의 온도차에 따른, 누설전류의 정상운전전류에 대한 상태크기를 분석하는 3단계; 및 상기 3단계에서 분석한 결과를 이용하여 피뢰기를 진단하는 4단계;를 수행하는 것을 특징으로 한다.According to another aspect of the present invention, there is provided a method of diagnosing a state of an arrester, the method comprising: analyzing a change in leakage current of an arrester according to an ambient temperature; Analyzing the relationship between the surface temperature and the ambient temperature of the arrester according to the leakage current; A three step of analyzing a state size of the leakage current according to the temperature difference between the surface temperature of the arrester and the ambient temperature; And diagnosing the arrester using the results analyzed in step 3 above.

특히, 상기 1단계 내지 상기 3단계는 상기 피뢰기의 환경을 항온항습상태로 하여 수행하는 것을 특징으로 한다.In particular, the step 1 to step 3 is characterized in that the environment of the arrester is carried out in a constant temperature and humidity.

또한 상기 4단계는 피뢰기를 진단할 때, 주위온도가 0℃ 이상일 경우에는 아래의 수학식 1에 의해 계산하여 진단하고, 주위온도가 0℃ 미만일 경우에는 아래의 수학식 2에 의해 계산하여 진단하는 것을 특징으로 한다.In addition, in the fourth step, when the arrester is diagnosed, when the ambient temperature is 0 ° C. or more, the calculation is performed by Equation 1 below. When the ambient temperature is less than 0 ° C., the diagnosis is calculated by Equation 2 below. It is characterized by.

Figure 112006001450673-PAT00001
Figure 112006001450673-PAT00001

단,

Figure 112006001450673-PAT00002
는 정상누설전류에 대한 상대크기이며,
Figure 112006001450673-PAT00003
는 주위온도와 표면온도와의 차이이다. only,
Figure 112006001450673-PAT00002
Is the relative magnitude with respect to the normal leakage current,
Figure 112006001450673-PAT00003
Is the difference between the ambient temperature and the surface temperature.

Figure 112006001450673-PAT00004
Figure 112006001450673-PAT00004

단,

Figure 112006001450673-PAT00005
는 정상누설전류에 대한 상대크기이며, 는
Figure 112006001450673-PAT00006
는 주위온도와 표면온도와의 차이이다. only,
Figure 112006001450673-PAT00005
Is the relative magnitude with respect to the normal leakage current,
Figure 112006001450673-PAT00006
Is the difference between the ambient temperature and the surface temperature.

이하, 첨부한 도면을 참조하여 본 발명의 바람직한 실시예를 보다 상세하게 살펴보고자 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 온도측정에 의한 피뢰기 진단장치를 도시한 블록도로서, 입력수단(100), 피뢰기온도측정수단(200), 표면온도측정수단(300), 중앙처리부(400), 표시수단(500) 그리고 통신드라이버(600)로 구성되어 있다.1 is a block diagram showing an arrester diagnostic device by the temperature measurement according to the present invention, the input means 100, lightning arrester temperature measuring means 200, surface temperature measuring means 300, the central processing unit 400, display The means 500 and the communication driver 600.

상기 입렵부(100)는 사용자의 조작에 의해 피뢰기(10)를 진단하기 위한 구동명령이 입력되도록 구성되어 있다.The wearer 100 is configured to input a driving command for diagnosing the arrester 10 by a user's operation.

또한, 상기 피뢰기온도측정수단(200)은 상기 피뢰기(10)의 표면온도를 측정하여 디지털 신호로 출력하고, 상기 주위온도측정수단(300)은 상기 피뢰기(10)의 주위온도를 측정하여 디지털신호로 출력하도록 구성되어 있다.In addition, the lightning arrester temperature measuring means 200 measures the surface temperature of the lightning arrester 10 and outputs it as a digital signal, and the ambient temperature measuring means 300 measures the ambient temperature of the lightning arrester 10 to measure the digital signal. It is configured to output.

특히, 상기 피뢰기온도측정수단(200)은 피뢰기(10)에 고압이 인가되므로, 적외선 온도계 등과 같은 비접촉식 온도계를 사용하는 것이 바람직하다. In particular, the lightning arrester temperature measuring means 200 is a high pressure is applied to the arrester 10, it is preferable to use a non-contact thermometer, such as an infrared thermometer.

한편, 상기 중앙처리부(400)는 상기 피뢰기온도측정수단(200)과 주위온도측정수단(300)으로부터 디지털신호를 인가받아, 계산한 피뢰기의 표면온도와 피뢰기주변의 온도차로부터, 정상누설전류에 대한 상태크기를 산출하여 상기 피뢰기(10)의 상태를 진단하고 진단데이터를 출력하도록 구성되어 있다.On the other hand, the central processing unit 400 receives a digital signal from the arrester temperature measuring means 200 and the ambient temperature measuring means 300, and calculates a normal leakage current from the calculated temperature difference between the surface temperature of the arrester and the surroundings of the arrester. It is configured to calculate the state size to diagnose the state of the arrester 10 and output the diagnostic data.

아울러, 상기 표시수단(500)은 상기 중앙처리부(400)로부터 인가받은 진단데이터를 화면으로 출력하도록 구성되어 있다.In addition, the display means 500 is configured to output the diagnostic data received from the central processing unit 400 on the screen.

상기 통신드라이버(600)는 상기 중앙처리부(400)로부터 진단데이터를 인가받아, 원거리에 있는 소정의 장치들, 예를 들어 컴퓨터, 프린터 등에 유선네트워크 또는 무선 전파를 이용하여 전송한다. The communication driver 600 receives diagnostic data from the central processing unit 400 and transmits the predetermined data to a predetermined device, such as a computer or a printer, at a remote location using a wired network or a radio wave.

본 발명에서 온도측정을 이용하여 피뢰기의 진단방법을 알아내는 과정을 살펴보면 아래와 같다.Looking at the process of finding out the diagnostic method of the arrester using the temperature measurement in the present invention.

도 2는 본 발명에 따른 옥도측정에 의한 피뢰기 진단방법의 수행과정을 나타낸 개략적인 흐름도이고, 도 3은 본 발명에 따른 주위온도에 대한 누설전류의 변화를 나타낸 그래프이고, 도 4는 본 발명에 따른 누설전류 변화에 따른 주위온도와 피뢰기표면온도의 관계를 나타낸 그래프이고, 도 5는 본 발명에 따른 온도차와 누설전류와의 관계를 나타낸 그래프이다.2 is a schematic flowchart showing a process of performing the arrester diagnosis method by measuring the degree of jade according to the present invention, Figure 3 is a graph showing the change of leakage current with respect to the ambient temperature according to the present invention, Figure 4 is a present invention FIG. 5 is a graph illustrating a relationship between an ambient temperature and an arrester surface temperature according to changes in leakage current, and FIG. 5 is a graph illustrating a relationship between a temperature difference and a leakage current according to the present invention.

우선 피뢰기의 열화와 누설전류, 온도와의 상관관계를 분석하기 위하여 상기 피뢰기를 항온항습기 내부에 설치하고(S1), 실험조건에 따라 온습도를 설정하여 2시간 이상 유지시킨다.First, in order to analyze the correlation between the deterioration of the arrester, the leakage current, and the temperature, the arrester is installed in the constant temperature and humidity chamber (S1), and the temperature and humidity are set for 2 hours or more according to the experimental conditions.

이후 계절적 온도변화에 따른 누설전류의 변화는 상기 항온항습기의 내부온도(주위온도)를 초기에 50℃로 설정하고 단계별로 5℃씩 낮추면서 -20℃까지 측정하였다(S2). Since the change of the leakage current according to the seasonal temperature change was measured to -20 ℃ while the internal temperature (ambient temperature) of the thermo-hygrostat was initially set to 50 ℃ and lowered by 5 ℃ step by step (S2).

상기 피뢰기의 누설전류와 표면온도의 관계는 상기 항온항습기의 내부 온도를 35℃에서 -15℃까지 10℃ 마다 정상운전전압(13.2kV)에서 흐르는 누설전류에 대해 100%~500%까지 변화시키면서 분석하였다. 또한 전력계통에서 기 사용되어 다소 열화가 진행된 피뢰기에 대해 신품의 실험결과와 비교하기 위하여 동종의 배전용 피뢰기 3종을 실험하였다.The relationship between the leakage current and the surface temperature of the arrester is analyzed by changing the internal temperature of the thermo-hygrostat from 100% to 500% with respect to the leakage current flowing at a normal operating voltage (13.2 kV) every 10 ° C from 35 ° C to -15 ° C. It was. In addition, three types of lightning arresters of the same type were tested to compare them with the new test results for the lightning arresters used in the power system.

상기 피뢰기의 누설전류는 주위 온도에 따라 다소 변화하며, 계절에 따른 온도변화가 누설전류에 큰 차이를 나타낼 경우에는 이에 대한 영향을 고려하여야 한다.The leakage current of the arrester varies slightly depending on the ambient temperature, and when the temperature change according to the season shows a large difference in the leakage current, the effect thereof should be considered.

하지만 주위온도에 대한 누설전류의 변화를 나타낸 도 3에 나타난 바와 같이 실험 온도범위에서 전체누설전류는 217㎂~227㎂로 변화폭은10㎂이하로 측정되었으며, 우리나라의 계절적 온도변화 범위에 해당하는 -15℃에서 35℃까지는 누설전류의 변화가 5㎂이하이었다. 이는 상기 피뢰기 특성에 따른 누설전류의 차이보다도 작은 값이므로, 피뢰기 진단시 계절적 온도변화에 따른 전체누설전류의 변화는 고려하지 않아도 된다.  However, as shown in Fig. 3 showing the change of leakage current with respect to the ambient temperature, the total leakage current in the experimental temperature range was measured to be 217㎂ ~ 227 변화 and the change range was less than 10㎂, which corresponds to the seasonal temperature change range of Korea. From 15 ° C to 35 ° C, the change in leakage current was 5 mA or less. Since this value is smaller than the difference of the leakage current according to the characteristics of the arrester, it is not necessary to consider the change of the total leakage current according to the seasonal temperature change in the arrester diagnosis.

또한, 상기 피뢰기는 열화진전에 따라 누설전류가 증가하며 누설전류의 증가로 표면온도가 상승한다. 즉, 상기 피뢰기의 표면온도는 주위온도, 누설전류에 의한 변수이므로 이들의 관계를 분석할 필요가 있다.In addition, the arrester increases the leakage current according to the deterioration progress and the surface temperature increases due to the increase of the leakage current. That is, since the surface temperature of the arrester is a variable by the ambient temperature and the leakage current, it is necessary to analyze these relationships.

도 4는 신품 피뢰기의 인가전압을 가변하여 전체누설전류의 실효값의 크기를 정상운전전압에서 흐르는 값의 100%~500%까지 증가시키면서 주위온도와 피뢰기의 표면온도와의 관계를 나타낸 것이다. 정상누설전류 값의 150%이상에서는 피뢰기의 표면온도가 급격히 상승하였으며, 각각의 주위온도에서 모두 유사한 경향을 나타내었다(S3).4 shows the relationship between the ambient temperature and the arrester surface temperature while increasing the magnitude of the effective value of the total leakage current by varying the applied voltage of the new lightning arrester to 100% to 500% of the value flowing at the normal operating voltage. Above 150% of the normal leakage current, the surface temperature of the arrester rapidly increased, and all showed similar tendency at each ambient temperature (S3).

그리고 도 5는 도 4의 결과를 피뢰기의 표면온도와 주위온도의 차이와 정상운전전류에 대한 상대 크기의 관계를 나타낸 것이다. 피뢰기의 누설전류가 정상누설전류의 125%이하에서는 온도차가 나타나지 않았으며, 150%에서 1℃~2℃, 200%에서 3℃~5℃, 300%에서 6℃~7℃, 400%에서 9℃~11℃범위이므로 피뢰기의 표면온도 측정으로부터 피뢰기의 상태를 진단할 수 있음을 알 수 있다(S4). 5 shows the relationship between the surface temperature and the ambient temperature of the arrester and the relative magnitude of the normal operating current. The leakage current of the arrester did not show a temperature difference below 125% of the normal leakage current.It was 1 ℃ -2 ℃ at 150%, 3 ℃ -5 ℃ at 200%, 6 ℃ -7 ℃ at 300%, 9 at 400%. Since the temperature range of ℃ ~ 11 ℃ it can be seen that the state of the arrester can be diagnosed from the measurement of the surface temperature of the arrester (S4).

상기의 실험결과로부터 온도차에 대한 정상누설전류와의 상대크기는, 주위온도가 0℃ 이상일 경우에는 아래의 수학식 3과 같이, 주위온도가 0℃ 미만일 경우에는 아래의 수학식 4와 같이 나타낼 수 있다. From the above experimental results, the relative magnitude of the normal leakage current with respect to the temperature difference can be expressed as Equation 3 below when the ambient temperature is above 0 ° C., and as shown below below when ambient temperature is below 0 ° C. have.

Figure 112006001450673-PAT00007
Figure 112006001450673-PAT00007

단,

Figure 112006001450673-PAT00008
는 정상누설전류에 대한 상대크기이며,
Figure 112006001450673-PAT00009
는 주위온도와 표면온도와의 차이이다. only,
Figure 112006001450673-PAT00008
Is the relative magnitude with respect to the normal leakage current,
Figure 112006001450673-PAT00009
Is the difference between the ambient temperature and the surface temperature.

Figure 112006001450673-PAT00010
Figure 112006001450673-PAT00010

단,

Figure 112006001450673-PAT00011
는 정상누설전류에 대한 상대크기이며,
Figure 112006001450673-PAT00012
는 주위온도와 표면온도와의 차이이다. only,
Figure 112006001450673-PAT00011
Is the relative magnitude with respect to the normal leakage current,
Figure 112006001450673-PAT00012
Is the difference between the ambient temperature and the surface temperature.

따라서 주위온도와 표면온도를 측정하여 산출된 온도차로부터 정상누설전류에 대한 상대 크기를 산출할 수 있으며, 이에 누설전류를 측정하지 않고도 피뢰기 상태를 진단할 수 있다.Therefore, the relative magnitude with respect to the normal leakage current can be calculated from the calculated temperature difference by measuring the ambient temperature and the surface temperature, and thus the arrester state can be diagnosed without measuring the leakage current.

상기에서 본 발명의 특정한 실시예가 설명 및 도시되었지만, 본 발명이 당업자에 의해 다양하게 변형되어 실시될 가능성이 있는 것은 자명한 일이다. 이와 같은 변형된 실시예들은 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어져서는 안 되며, 본 발명에 첨부된 청구범위 안에 속한다고 해야 할 것이다.While specific embodiments of the present invention have been described and illustrated above, it will be apparent that the present invention may be embodied in various modifications by those skilled in the art. Such modified embodiments should not be understood individually from the technical spirit or the prospect of the present invention, but should fall within the claims appended to the present invention.

따라서, 본 발명에서는 온도측정을 통해 피뢰기를 진단함으로서, 전기적 신호를 사용하지 않으므로 전원고조파와 주변전자계에 의한 측정오차를 최소화하여 좀 더 정밀한 진단데이터를 얻을 수 있는 이점이 있다.또한, 고전압 전기회로에 접근하지 않으므로 피뢰기 진단의 안전성을 향상시킬 수 있는 이점이 있다.Therefore, in the present invention, by diagnosing the arrester through the temperature measurement, since the electrical signal is not used, there is an advantage in that more accurate diagnostic data can be obtained by minimizing the measurement error caused by the power harmonics and the surrounding electromagnetic field. There is an advantage in that it can improve the safety of the arrester diagnosis.

Claims (6)

피뢰기 진단장치에 있어서,In the arrester diagnostic device, 피뢰기를 진단하기 위한 구동명령을 입력하는 입력수단;Input means for inputting a driving command for diagnosing the arrester; 상기 피뢰기의 표면온도를 측정하여 디지털신호로 출력하는 피뢰기온도측정수단;Lightning arrester temperature measuring means for measuring the surface temperature of the arrester and outputting it as a digital signal; 상기 피뢰기의 주위온도를 측정하여 디지털신호로 출력하는 주위온도측정수단;Ambient temperature measuring means for measuring the ambient temperature of the arrester and outputting it as a digital signal; 상기 피뢰기온도측정수단과 주위온도측정수단으로부터 디지털신호를 인가받아, 계산한 피뢰기의 표면온도와 주위온도의 온도차로부터, 정상누설전류에 대한 상태크기를 산출하여 상기 피뢰기의 상태를 진단하고 진단데이터를 출력하는 중앙처리부; 및A digital signal is applied from the arrester temperature measuring means and the ambient temperature measuring means, and the state size of the normal leakage current is calculated from the calculated temperature difference between the surface temperature of the arrester and the ambient temperature to diagnose the state of the arrester, and the diagnostic data is obtained. A central processing unit for outputting; And 상기 중앙처리부로부터 인가받은 진단데이터를 화면으로 출력하는 표시수단; 으로 구성된 것을 특징으로 하는 피뢰기 온도측정에 의한 피뢰기 진단장치.Display means for outputting diagnostic data received from the central processing unit to a screen; Lightning arrester diagnostic device by the arrester temperature measurement, characterized in that consisting of. 청구항 1에 있어서, 상기 피뢰기온도측정수단은,The method of claim 1, wherein the arrester temperature measuring means, 비접촉식 온도측정수단인 것을 특징으로 하는 피뢰기 온도측정에 의한 피뢰기 진단장치.Lightning arrester diagnostic apparatus according to the lightning arrester temperature measurement, characterized in that the non-contact temperature measuring means. 청구항 1에 있어서,The method according to claim 1, 상기 중앙처리부를 통해 진단한 피뢰기의 진단데이터를 유선 또는 무선으로, 소정의 장치에 전달하는 통신드라이버를 구비한 것을 특징으로 하는 피뢰기 온도측정에 의한 피뢰기 진단장치.Lightning arrester diagnostic apparatus according to the lightning arrester temperature measurement, characterized in that it comprises a communication driver for transmitting the diagnostic data of the arrester diagnosed by the central processing unit, wired or wireless, to a predetermined device. 피뢰기의 상태를 진단하는 방법에 있어서,In the method for diagnosing the state of the arrester, 주위 온도에 따른 피뢰기의 누설전류의 변화를 분석하는 1단계;Analyzing the change of the leakage current of the arrester according to the ambient temperature; 상기 누설전류에 따른 상기 피뢰기의 표면온도와 주위온도의 관계를 분석하는 2단계;Analyzing the relationship between the surface temperature and the ambient temperature of the arrester according to the leakage current; 상기 피뢰기의 표면온도와 주위온도의 온도차에 따른, 누설전류의 정상운전전류에 대한 상태크기를 분석하는 3단계; 및A three step of analyzing a state size of the leakage current according to the temperature difference between the surface temperature of the arrester and the ambient temperature; And 상기 3단계에서 분석한 결과를 이용하여 피뢰기를 진단하는 4단계;를 수행하는 것을 특징으로 하는 온도측정에 의한 피뢰기 진단방법.4. The method of diagnosing the arrester using the result analyzed in step 3 is performed. 청구항 4에 있어서, 상기 1단계 내지 상기 3단계는,The method according to claim 4, wherein Step 1 to Step 3, 상기 피뢰기의 환경을 항온항습상태로 하여 수행하는 것을 특징으로 하는 온도측정에 의한 피뢰기 진단방법.Lightning arrester diagnostic method according to the temperature measurement, characterized in that to perform the environment of the arrester in a constant temperature and humidity. 청구항 5에 있어서, 상기 제4단계는,The method of claim 5, wherein the fourth step, 피뢰기를 진단할 때, 주위온도가 0℃ 이상일 경우에는 아래의 수학식 3에 의해 계산하여 진단하고, 주위온도가 0℃ 미만일 경우에는 아래의 수학식 4에 의해 계산하여 진단하는 것을 특징으로 하는 온도측정에 의한 피뢰기 진단방법.When diagnosing an arrester, when the ambient temperature is 0 ° C. or more, the calculation is performed by the following equation (3). Method of diagnosis of arrester by measurement.
Figure 112006001450673-PAT00013
Figure 112006001450673-PAT00013
 단,
Figure 112006001450673-PAT00014
는 정상누설전류에 대한 상대크기이며,
Figure 112006001450673-PAT00015
는 주위온도와 표면온도와의 차이이다. only,
Figure 112006001450673-PAT00014
Is the relative magnitude with respect to the normal leakage current,
Figure 112006001450673-PAT00015
Is the difference between the ambient temperature and the surface temperature.
Figure 112006001450673-PAT00016
Figure 112006001450673-PAT00016
 단,
Figure 112006001450673-PAT00017
는 정상누설전류에 대한 상대크기이며,
Figure 112006001450673-PAT00018
는 주위온도와 표면온도와의 차이이다. only,
Figure 112006001450673-PAT00017
Is the relative magnitude with respect to the normal leakage current,
Figure 112006001450673-PAT00018
Is the difference between the ambient temperature and the surface temperature.
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KR100884562B1 (en) * 2007-12-24 2009-02-19 (주)동부기술단 The apparatus for checking the lighting arrester's abnormality
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KR100884562B1 (en) * 2007-12-24 2009-02-19 (주)동부기술단 The apparatus for checking the lighting arrester's abnormality
KR100940175B1 (en) * 2009-06-30 2010-02-03 한국전력공사 Voltage control device for protecting surge arrestor
WO2011002221A2 (en) * 2009-06-30 2011-01-06 한국전력공사 Voltage control device for protecting a lightning arrester
WO2011002221A3 (en) * 2009-06-30 2011-04-14 한국전력공사 Voltage control device for protecting a lightning arrester
KR101040112B1 (en) * 2009-06-30 2011-06-09 한국전력공사 Voltage contron device for protecting surge arrestor
EP3422504A4 (en) * 2016-02-24 2019-03-27 Mitsubishi Electric Corporation Monitoring system and monitoring method
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