KR950009869B1 - Measuring device for voltage and current - Google Patents

Measuring device for voltage and current Download PDF

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Publication number
KR950009869B1
KR950009869B1 KR1019930001230A KR930001230A KR950009869B1 KR 950009869 B1 KR950009869 B1 KR 950009869B1 KR 1019930001230 A KR1019930001230 A KR 1019930001230A KR 930001230 A KR930001230 A KR 930001230A KR 950009869 B1 KR950009869 B1 KR 950009869B1
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South Korea
Prior art keywords
optical
sensor unit
voltage
optical sensor
measuring device
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KR1019930001230A
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Korean (ko)
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KR940018669A (en
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송정태
박종범
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엘지전선 주식회사
박원근
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    • 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
    • G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
    • 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
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/2513—Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

a coil having an opening portion fixedly connected to an optical sensor unit; a light emitting diode connected to one side of the optical sensor unit through a first optical connector and a first optical fiber; an optical detector connected to the other side of the optical sensor unit through a second optical connector and a second optical fiber; and an R.S.T feature passing through a center portion of the core.

Description

광학식 영상전류, 전압측정장치Optical image current, voltage measuring device

제1도는 본발명의 공학식 영상전류, 전압측정장치도.1 is an engineering image current, voltage measurement device of the present invention.

제2도는 자계에 따른 광센서 유닛 구성도.2 is a configuration diagram of an optical sensor unit according to a magnetic field.

제3도는 전계에 따른 광센서 유닛 구성도.3 is a configuration diagram of an optical sensor unit according to an electric field.

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

1 : 코아(Core) 2 : R.S.T상(相)1: Core 2: R.S.T phase

3 : 발광다이오드(LED) 4 : 광검출기(PD)3: light emitting diode (LED) 4: photodetector (PD)

5a-5b : 광섬유 6a-6b : 광콘넥터5a-5b: Fiber Optic 6a-6b: Optical Connector

7a-7b : 편광자 8a-8b : 감광자7a-7b: polarizer 8a-8b: photosensitive member

9 : ZnSe 10 : BSO(Bi12SiO20)9: ZnSe 10: BSO (Bi 12 SiO 20 )

11 : 개방부 12 : 광센서 유닛11 open part 12 light sensor unit

14 :판14: plate

본 발명은 전력계통에 사용하는 측정장치에 관한 것으로, 특히 전력계통의 사고발생에 따른 사고유무를 광을 이용하여 신속하게 측정하는 광학식 영상전류, 전압측정장치에 관한 것이다.The present invention relates to a measuring device for use in power systems, and more particularly, to an optical image current and voltage measuring device for quickly measuring the presence or absence of an accident caused by the power system using light.

일반적으로 영상전류, 전압을 측정할 때는 전기자기식 방법을 이용한 전류계(CT), 전압계(PT)로 사용하는 바, 종래의 경우 전기 자기식 영상전류, 전압측정장치는 사고 발생에 따른 신호검출이 어렵고 외부 노이즈 영향등으로 사고검출에 대한 신뢰성에 문제점이 있었다.In general, when measuring the image current and voltage, it is used as the ammeter (CT) and the voltmeter (PT) using the electromagnetic method. In the conventional case, the electromagnet image current and the voltage measuring device are used to detect signals due to an accident. It was difficult and there was a problem in reliability of accident detection due to external noise influence.

본 발명은 종래의 문제점을 해결하기 위해 안출한 것으로, 전기 자기식 영상전류, 전압측정장치를 광학식 영상전류 전압측정장치로 개량함으로써 빛의 편광상태 변화를 검출하고 영상전류, 전압을 측정함으로써 사고유무를 신속 검출이 가능하고, 외부 노이즈 영향을 받지 않는 광학식 영상전류, 전압측정장치를 제공하는데 그 목적이 있다.The present invention has been made to solve the conventional problems, by detecting the change in the polarization state of the light by measuring the electromagnetism image current, voltage measuring device to the optical image current voltage measuring device and the presence of an accident by measuring the image current, voltage It is an object of the present invention to provide an optical image current and voltage measurement device capable of quick detection and not affected by external noise.

본 발명은 도면을 참조하여 상세히 설명하면 다음과 같다.The present invention will be described in detail with reference to the drawings.

제1도는 본 발명의 광학식 영상전류, 전압측정장치도로서 코일(1)의 개방부(11)에 광센서 유닛(12)을 고정접속하고, 광센서 유닛(12)일측은 광콘넥터(6a)를 통해 광섬유(5a)를 경유 발광다이오드(3)에 연결하고 광센서 유닛(12) 타측은 광콘넥터(6b)를 통해 광섬유(5b)를 경유 광검출단(4)에 연결하고, 코일(1) 중심부에 R.S.T상(2)에 통과하게 구성한다.1 is an optical image current and voltage measurement device of the present invention. The optical sensor unit 12 is fixedly connected to the opening 11 of the coil 1, and one side of the optical sensor unit 12 is an optical connector 6a. The optical fiber 5a is connected to the light emitting diode 3 via the optical sensor unit 12, and the other end of the optical sensor unit 12 is connected to the optical photodetection terminal 4 via the optical connector 6b. ) It is configured to pass through the RST phase 2 at the center.

상기의 광센서 유닛(12)은 자계를 이용한 편광자(7a), ZnSe(9), BSO(10), 검광자(8a)로 구성된다.The optical sensor unit 12 includes a polarizer 7a, a ZnSe 9, a BSO 10, and an analyzer 8a using a magnetic field.

상기 광센서 유닛(12)은 전계를 이용한 편광자(7b),판(13), R.S.T상에 각각 연결된 3개의 BSO(10), 검광자(8b)로 구성한다.The optical sensor unit 12 is a polarizer 7b using an electric field, It consists of the board 13, three BSOs 10, and the analyzer 8b respectively connected on the RST.

제1도와 제2도를 관련시켜 자계를 이용한 본 발명의 영상 전류 검출장치를 설명하면, R.S,T상(相)(2) 모두를 묶어 그 주위를 코아(Core)(1) 중심부에 통과하게 끼우고 코아(1)의 개방부(11)에 광센서 유닛(12)을 고정접속하며, 광원인 발광다이오드(LED)(3)로부터 발생된 빛이 광섬유(5a)를 통해 광센서 유닛(12)의 광콘넥터(6a)로 인가되게 연결하고, 그 발광 다이오드(3)에 의해 발생된 빛이 편광자(7a)와 ZnSe(9) 및 BSO(Bi12SiO20)(10)를 통해 광센서 유닛(12)의 광콘넥터(6b)와 연결된 광섬유(5b)를 경유 광검출단(4)에 인가한다.Referring to FIG. 1 and FIG. 2, the image current detecting device of the present invention using a magnetic field is described. The RS and T phases 2 are bundled together so that the periphery of the RS and T phases 2 passes through the core 1 core. The light sensor unit 12 is fixedly connected to the opening 11 of the core 1, and the light generated from the light emitting diode (LED) 3 serving as the light source passes through the optical sensor 5a. The light generated by the light emitting diodes 3 through the polarizer 7a, ZnSe (9) and BSO (Bi 12 SiO 20 ) (10). The optical fiber 5b connected to the optical connector 6b of (12) is applied to the diesel light detecting end 4.

상기를 상술하면, 광원인 발광다이오드(3)에 의해 발생된 빛이 광섬유(5a)를 통해 광센서 유닛(12)까지 전달하는 바, 여기서 일정하게 빛이 진동하도록 편광자(7a)를 통해 빛을 선형 편광시킨다.In detail, the light generated by the light emitting diode 3, which is a light source, is transmitted to the optical sensor unit 12 through the optical fiber 5a, where light is constantly transmitted through the polarizer 7a to vibrate light. Linearly polarize.

이렇게 선형 편광된 빛은 자계에 의해 좌우로 회전하게 되며, 이 회전량이 인가된 전류에 비례함으로써 전류 측정이 가능한 것이다.The linearly polarized light is rotated to the left and right by the magnetic field, and the amount of rotation is proportional to the applied current, thereby measuring current.

즉 영상전류 검출장치인 경우(제1,2도) 사고가 발생하지 않은 상태에서는 R.S.T상(2)에 의해 발생하는 자게(Magneic Field)는 거의 평행상태를 이루어 검출되는 량이 적어 광신호가 미약하게 검출되지만, 사고 발생시 R.S.T상(2)의 자계 평행상태가 깨져 광신호가 크게 검출된다.That is, in the case of an image current detection device (first and second degrees), when no accident occurs, the magnetic field generated by the RST phase 2 is almost parallel, so that the amount of light detected is weak. However, in the event of an accident, the magnetic field parallel state of the RST phase 2 is broken, and the optical signal is largely detected.

제3도는 본 발명의 영상전압 검출장치의 경우로서 광센서 유닛(12) 내부에 전기 광학적 소자인 BSO(10) 3개로 구성하고 R.S.T상(2)의 전압을 각각 BSO(10)에 인가하게 구성한다.3 is a case of the image voltage detection device of the present invention configured to include three electro-optical elements BSO 10 in the optical sensor unit 12 and to apply the voltage of the RST phase 2 to the BSO 10, respectively. do.

즉 영상전압 검출장치인 경우 사고가 발생하지 않으면 각각의 R.S.T상(2)에 인가된 전압이 동일한 상태로 유지됨으로써 R.S.T상(2)에 의해 발생하는 전계(Electric Field)는 거의 평행상태로 이루어져 각각의 전계센서 BSO(10)에 의해 발생하는 복굴절은 거의 상태되어 검출되는 광신호가 미약하게 되지만, 사고 발생시 R.S.T상(2)의 전계 평행상태가 깨져 광신호가 크게 검출되어 영상전압을 검출할 수 있다.That is, in the case of the video voltage detection device, if an accident does not occur, the voltage applied to each RST phase 2 is kept in the same state, and thus the electric field generated by the RST phase 2 is almost parallel. The birefringence generated by the electric field sensor BSO 10 is almost in a state where the detected optical signal is weak. However, when an accident occurs, the electric field parallel state of the RST phase 2 is broken and the optical signal is largely detected to detect the image voltage.

이와 같이 본 발명은 주위 고전압의 영향을 받지 않고 노이즈 영향을 극복할 수 있으며, 광에 의한 주파수 특성이 우수하고 사고발생에 따른 신속검출이 가능한 장점과 함께 신뢰성 향상에 크게 이바지한 발명이다.As described above, the present invention can overcome the influence of noise without being affected by the surrounding high voltage, and is an invention that greatly contributed to the improvement of reliability with the advantage that the frequency characteristic by light is excellent and the rapid detection according to an accident occurs.

Claims (3)

광을 이용한 영상 전류, 전압측정장치에 있어서, 코일(1)의 개방부(11)에 광센서 유닛(12)을 고정접속하고, 광센서 유닛(12) 일측은 광콘넥터(6a)를 통해 광섬유(5a)를 경유 발광다이오드(3)에 연결하고 광센서 유닛(12) 타측은 광콘넥터(6b)를 통해 광섬유(15b)를 경유 광검출단(4)에 연결하고, 코일(1) 중심부에 R.S.T상(2)에 통과하게 구성함을 특징으로 하는 광학식 영상정류, 전압측정장치.In the image current and voltage measurement apparatus using light, the optical sensor unit 12 is fixedly connected to the opening 11 of the coil 1, and one side of the optical sensor unit 12 is connected to the optical fiber through the optical connector 6a. Connect 5a to the light emitting diode 3, and the other end of the optical sensor unit 12 connects the optical fiber 15b to the light detecting end 4 via the optical connector 6b, and at the center of the coil 1 Optical image rectification and voltage measuring device, characterized in that passing through the RST phase (2). 제1항에 있어서, 상기의 광센서 유닛(12)은 자계를 이용한 편광자(7a), ZnSe(9), BSO(10), 검광자(8a)로 구성함을 특징으로 하는 광학식 영상전류, 전압측정장치.The optical image current and voltage of claim 1, wherein the optical sensor unit 12 includes a polarizer 7a, a ZnSe 9, a BSO 10, and an analyzer 8a using a magnetic field. Measuring device. 제1항에 있어서, 상기 광센서 유닛(12)은 전계를 이용한 편광자(7b),판(13), R.S.T상에 각각 연결된 3개의 BSO(10), 검광자(8b)로 구성함을 특징으로 하는 광학식 영상전류, 전압측정장치.The method of claim 1, wherein the optical sensor unit 12 is a polarizer 7b using an electric field, An optical image current and voltage measuring device comprising a plate (13), three BSOs (10) and an analyzer (8b) respectively connected on an RST.
KR1019930001230A 1993-01-30 1993-01-30 Measuring device for voltage and current KR950009869B1 (en)

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KR1019930001230A KR950009869B1 (en) 1993-01-30 1993-01-30 Measuring device for voltage and current

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KR950009869B1 true KR950009869B1 (en) 1995-09-01

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KR100662744B1 (en) * 2004-07-12 2007-01-02 엘에스산전 주식회사 Bulk type optical current/potential sensor

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