KR20000028507A - Apparatus for detecting voltage of extra high voltage distribution line - Google Patents

Apparatus for detecting voltage of extra high voltage distribution line Download PDF

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KR20000028507A
KR20000028507A KR1019980046856A KR19980046856A KR20000028507A KR 20000028507 A KR20000028507 A KR 20000028507A KR 1019980046856 A KR1019980046856 A KR 1019980046856A KR 19980046856 A KR19980046856 A KR 19980046856A KR 20000028507 A KR20000028507 A KR 20000028507A
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voltage
high voltage
distribution line
voltage detection
detecting electrode
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KR1019980046856A
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Korean (ko)
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KR100305615B1 (en
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길경석
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길경석
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/155—Indicating the presence of voltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • G01R1/0416—Connectors, terminals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE: An apparatus for detecting voltage of extra high voltage distribution line is provided to measure a voltage easily by installing in an insulating bushing of gas insulating switch in a manner of high voltage conductor and non-contact. CONSTITUTION: A gas insulating switch(4) is installed in an extra high voltage distribution line, in which a voltage detecting electrode(1) formed as a ring type, is fixed in an insulating bushing(3) in a concentric circle type centered a high voltage conductor(2) by adhesive. A capacitance acts between the high voltage conductor(2) insulated by insulating bushing(3) and voltage detecting electrode(1) installed in a surface of the insulating bushing(3). A voltage dividing circuit is formed by the capacitance of the voltage detecting electrode(1).

Description

특고압 배전선로의 전압검출장치Voltage detection device of extra-high voltage distribution line

본 발명의 목적은 특고압 배전선로에 있어서 전압측정을 용이하게 하기 위한 전압검출 방법 및 장치를 제공하는데 있다.It is an object of the present invention to provide a voltage detection method and apparatus for facilitating voltage measurement in an extra high voltage distribution line.

본 발명은 특고압 배전선로에서 전압을 측정하는 기술에 관한 것이다.The present invention relates to a technique for measuring voltage in an extra-high voltage distribution line.

특고압 배전계통은 부하설비의 분포에 따라 많은 선로의 분기와 연계로 구성이 복잡하고, 사고의 발생 빈도도 높으므로 전력공급의 신뢰성, 안정성 확보를 위하여는 배전 계통내의 전압을 선로상에서 상시 검출하고, 이들 정보를 이용하여 계통을 분리 또는 접속하는 등의 제어수단이 필요하다.The extra-high voltage distribution system is complicated in connection with the branch of many lines according to the distribution of load facilities and the frequency of accidents is high. Therefore, to ensure the reliability and stability of power supply, the voltage in the distribution system is always detected on the line. And control means for disconnecting or connecting the system using these information.

일반적으로 특고압 배전선로의 전압검출에는 별도의 계기용변성기(PT)를 설치하는 방식을 이용하거나, 가스절연개폐기에 계기용 변성기 또는 분압용 고압콘덴서를 내장하여 고전압 도체와 직접 접속하여 저전압으로 분압하는 방식이 사용되어 왔다.Generally, a separate instrument transformer (PT) is used for voltage detection of a special high-voltage distribution line, or a gas transformer is built in a transformer transformer or a high voltage capacitor for voltage dividing and connected directly to a high voltage conductor to provide a partial voltage. Has been used.

그러나, 계기용변성기를 이용하는 종래의 방법은 특고압 배전선로에 고압/저압 변압기를 설치하기 위한 별도의 설치장소가 필요하고, 설치에도 많은 비용이 따르며, 사용시간에 따른 절연내력의 저하 등의 문제점이 있다.However, the conventional method using the transformer for the instrument requires a separate installation place for installing the high-voltage / low-voltage transformer on the high-voltage distribution line, it is expensive to install, and problems such as lowering the dielectric strength with time of use There is this.

또한 가스절연개폐기에 계기용 변성기나 분압용 콘덴서를 내장하는 또 다른 방식은 기설의 가스절연개폐기에는 설치가 불가능하며, 신설의 가스절연개폐기에 설치시는 제작할 때부터 설치를 고려해야만 한다.In addition, another method of incorporating an instrument transformer or a partial pressure capacitor in a gas insulated switchgear cannot be installed in an existing gas insulated switchgear.

뿐만 아니라 가스절연개폐기 내에서 콘덴서의 한 단자가 직접 고전압 도체에 접속되어야 하므로 사용시간에 따른 절연저하로 내부의 콘덴서가 소손되는 등의 사고로 인한 2차적인 장애를 유발시키는 문제점이 있다.In addition, since one terminal of the capacitor must be directly connected to the high voltage conductor in the gas insulated switchgear, there is a problem of causing a secondary failure due to an accident such as the internal capacitor being burned out due to the insulation degradation according to the use time.

본 발명은 상기와 같은 문제점을 해결하고, 더욱 안전하고 신뢰성 있는 전압측정을 위해 가스절연개폐기의 절연붓싱에 고전압도체와 비접촉방식으로 설치가 가능한 전압검출 방법 및 장치를 제공하고자 한다.The present invention is to solve the above problems, and to provide a voltage detection method and apparatus that can be installed in a non-contact manner with a high voltage conductor in the insulating bushing of the gas insulated switchgear for more safe and reliable voltage measurement.

도 1 은 본 발명에 따른 전압검출 원리와 장치를 특고압 배전선로의 가스절연개폐기에 설치한 실시 예1 is an embodiment in which the voltage detection principle and apparatus according to the present invention are installed in a gas insulated switchgear of an extra-high voltage distribution line.

도 2 는 본 발명의 전압검출장치의 형상2 is a shape of the voltage detection device of the present invention

도 3 은 본 발명의 접속장치의 형상3 is the shape of the connecting device of the present invention

＜ 도면 중 주요부호에 대한 부호의 설명 ＞<Description of the code | symbol about the main code in the drawing>

1 : 전압검출전극, 2 : 고전압 도체, 3 : 절연붓싱1: voltage detecting electrode, 2: high voltage conductor, 3: insulating bushing

4 : 가스절연개폐기,4: gas insulated switchgear,

5 : 고전압도체와 전압검출전극 사이의 정전용량(Ch)5: capacitance (C h ) between the high voltage conductor and the voltage detection electrode

6 : 전압검출전극의 정전용량(Cd),6: the capacitance of the voltage detecting electrode (C d),

7 : 접속장치, 8 : 분압비 조정용 콘덴서(Cp)7: connecting device, 8: partial pressure ratio adjusting capacitor (C p )

9 : 신호전송케이블9: Signal transmission cable

도 1은 특고압 배전선로에서 가스절연개폐기를 이용하여 배전선로의 전압을 측정하기 위한 전압검출 방법과 장치를 배전선로의 가스절연개폐기에 설치한 실시 예를 나타낸 것이다. 도 1에서 전압검출전극(1)은 링 형상으로 되어 있고, 고전압 도체(2)를 중심으로 동심원 형태로 가스절연개폐기(4)의 절연붓싱(3)에 접착제 등에 의해 고정 설치될 수 있으며, 주위의 환경조건을 고려하여 절연붓싱 내에 설계·제작시 삽입할 수도 있다.FIG. 1 illustrates an embodiment in which a voltage detection method and apparatus for measuring a voltage of a distribution line using a gas insulated switchgear in an extra-high voltage distribution line are installed in a gas insulated switchgear of a distribution line. In FIG. 1, the voltage detecting electrode 1 has a ring shape, and may be fixed to the insulating bushing 3 of the gas insulated switchgear 4 by an adhesive or the like in a concentric manner around the high voltage conductor 2. It can be inserted into the design and manufacturing in the insulation bushing considering the environmental conditions of

상기의 구성에 의해, 본 발명은 일종의 용량성 분압기로 가스절연개폐기에 절연붓싱(3)으로 절연된 고전압 도체(2)와 절연붓싱(3) 표면에 설치된 전압검출전극(1) 사이에 작용하는 정전용량 Ch와 전압검출전극(1)의 정전용량 Cd에 의해 분압회로가 형성된다.With the above arrangement, the present invention acts between a high voltage conductor 2 insulated with an insulating bushing 3 in a gas insulator with a kind of capacitive voltage divider and a voltage detecting electrode 1 provided on the surface of the insulating bushing 3. The voltage dividing circuit is formed by the capacitance C h and the capacitance C d of the voltage detection electrode 1.

상기 회로에서 전압검출전극의 정전용량 Cd는 대단히 작기 때문에 피측정 대상이 고전압이므로 Cd와 병렬로 수 nF의 주파수 특성이 우수한 운모 콘덴서 Cp를 연결하여 저압측 분압회로의 분압비 조정과 안정성을 향상시키는 것이 바람직하다.In this circuit, since the capacitance C d of the voltage detecting electrode is very small, the voltage to be measured is a high voltage, so the mica capacitor C p having excellent frequency characteristics of several nF is connected in parallel with the C d to adjust the voltage division ratio and stability of the low voltage side voltage dividing circuit. It is desirable to improve.

도 2는 본 발명의 전압검출전극(1)의 단면도로 가스절연개폐기의 절연붓싱(3)에 설치하기 위하여 링형의 전기절연재료에 동판을 접착시킨 구조로 되어 있으며, 전압검출전극(1)과 도 3에 도시한 접속장치(7)와의 연결이 용이하도록 전압검출전극(1)에 BNC(BN Connector)를 설치한다. 또한 상기의 전압검출장치에서 분압비는 입력신호의 주파수 성분과 정전용량에 따라 달라지므로 넓은 주파수 대역에서 분압비가 일정한 특성을 얻으려면 전압검출전극(1)의 정전용량이 일정한 것이 좋다. 그러하기 위해서는 검출전극의 절연재료에 대한 주파수 특성이 우수해야 하며, 본 발명에는 구입과 가공이 쉬운 테플론과 에폭시 등의 전기절연재료가 사용될 수 있으나, 테플론보다는 에폭시를 사용하는 것이 바람직하다.FIG. 2 is a cross-sectional view of the voltage detecting electrode 1 of the present invention, in which a copper plate is bonded to a ring-shaped electrical insulating material for installation on the insulating bushing 3 of the gas insulated switchgear. A BNC (BN Connector) is provided on the voltage detection electrode 1 to facilitate connection with the connection device 7 shown in FIG. In addition, since the voltage dividing ratio in the voltage detection device depends on the frequency component and capacitance of the input signal, it is preferable that the capacitance of the voltage detecting electrode 1 is constant in order to obtain a constant characteristic of the voltage dividing ratio in a wide frequency band. To this end, the frequency characteristics of the insulating material of the detection electrode should be excellent, and an electric insulating material such as Teflon and epoxy, which is easy to purchase and process, may be used in the present invention, but it is preferable to use epoxy rather than Teflon.

도 3은 분압비 조정용 콘덴서(8)Cp를 내장하고, 본 발명의 전압검출전극(1)과 신호전송케이블(9)과의 접속을 용이하게 하기 위한 접속장치(7)이다.Fig. 3 is a connection device 7 having a voltage dividing ratio adjusting capacitor 8 C p embedded therein for facilitating the connection between the voltage detection electrode 1 and the signal transmission cable 9 of the present invention.

도 3의 접속장치(7)의 한쪽 단자는 본 발명의 전압검출전극(1)에 접속하며, 다른 한 단자는 신호전송케이블(9)에 접속한다.One terminal of the connecting device 7 of FIG. 3 is connected to the voltage detecting electrode 1 of the present invention, and the other terminal is connected to the signal transmission cable 9.

상기 신호전송케이블(9)은 광대역의 신호전송을 위해 RG-58A/U와 같은 동축케이블을 사용하는 것이 바람직하며, 본 발명에서도 신호전송케이블로 RG-58A/U을 사용할수 있도록 접속장치에 BNC를 설치하였다.The signal transmission cable 9 preferably uses a coaxial cable such as RG-58A / U for wideband signal transmission. In the present invention, the BNC is connected to the connection device so that the RG-58A / U can be used as the signal transmission cable. Was installed.

이상에서와 같이 본 발명에 의한 전압검출장치는 기설 또는 신설의 가스절연개폐기의 외부에 구조변경 없이 간단히 적용할 수 있으며, 특고압 배전선로에서 정확한 전압검출은 물론 본 전압검출장치의 설치로 인한 가스절연개폐기의 전기적 특성에는 어떠한 영향도 주지 않을 뿐만 아니라, 가스절연개폐기 외부에 노출되어 있는 절연붓싱에 설치되므로 구조변경, 설치장소의 제한, 절연저하로 인한 2차적 사고등에 대한 문제점이 없어, 특고압 배전선로의 전압을 측정하는데 매우 효과적이다.As described above, the voltage detection device according to the present invention can be simply applied to the exterior of an existing or newly established gas insulated switchgear, and the gas due to the installation of the voltage detection device as well as accurate voltage detection in a special high voltage distribution line. It does not have any influence on the electrical characteristics of the insulation switch, and it is installed on the insulation bushing exposed outside the gas insulation switch, so there is no problem of structural change, restriction of installation place, secondary accidents due to insulation degradation, etc. It is very effective for measuring the voltage of distribution line.

상기의 식별자가 없습니다.No identifier above

Claims (4)

가스절연개폐기가 설치된 특고압배전선로에 있어서,In the high voltage distribution line with the gas insulated switchgear, 가스절연개폐기의 절연붓싱내의 고전압도체와 전압검출전극 사이에 작용하는 정전용량과, 전압검출전극의 정전용량에 의한 용량성 분압회로로 구성되는 비접촉방식의 전압검출장치.A non-contact voltage detection device comprising a capacitance acting between a high voltage conductor and a voltage detection electrode in an insulation bushing of a gas insulated switchgear, and a capacitive voltage divider circuit by the capacitance of the voltage detection electrode. 제1항에있어서,According to claim 1, 전압검출전극은 링형의 에폭시로 전기 절연된 것을The voltage detecting electrode is electrically insulated with ring type epoxy 절연붓싱 외부에 설치하는 것을 특징으로 하는 전압검출장치Voltage detection device, characterized in that installed outside the insulation bushing 제1항에 있어서,The method of claim 1, 전압검출전극은 링형의 자기로 전기 절연된 것을The voltage detecting electrode is electrically insulated with a ring magnet 절연붓싱 내부에 내장하는 것을 특징으로 하는 전압검출장치Voltage detection device, characterized in that embedded in the insulation bushing 제1항에 있어서,The method of claim 1, 전압검출전극과 신호전송케이블과의 접속을 용이하게 하고, 분압비Easy connection between voltage detection electrode and signal transmission cable 조정용 콘덴서를 내장하기 위한 접속장치를 더 포함하는 것을 특징으로 하는 전압검출장치.And a connection device for embedding the adjusting capacitor.
KR1019980046856A 1998-10-29 1998-10-29 Voltage detection device of extra high voltage distribution line KR100305615B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101138413B1 (en) * 2010-10-11 2012-04-26 한국전자통신연구원 High voltage broadband pulse attenuator
KR101145773B1 (en) * 2010-10-11 2012-05-16 한국전자통신연구원 High voltage broadband pulse attenuator having attenuation value self-correcting function

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KR102359151B1 (en) 2017-03-17 2022-02-08 한국전력공사 System and Method for measuring On-line Trip/Close Surge for Circuit Breaker Equipment
KR20220126381A (en) 2021-03-09 2022-09-16 한국전력공사 Voltage measuring device for high voltage power equipment and high voltage power equipment with the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101138413B1 (en) * 2010-10-11 2012-04-26 한국전자통신연구원 High voltage broadband pulse attenuator
KR101145773B1 (en) * 2010-10-11 2012-05-16 한국전자통신연구원 High voltage broadband pulse attenuator having attenuation value self-correcting function
US8653905B2 (en) 2010-10-11 2014-02-18 Electronics And Telecommunications Research Institute High-voltage wideband pulse attenuator having attenuation value self-correction function

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