KR100728866B1 - High Current Measuring System of Railway Car Using Low Current Transformer - Google Patents

High Current Measuring System of Railway Car Using Low Current Transformer Download PDF

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KR100728866B1
KR100728866B1 KR1020040053543A KR20040053543A KR100728866B1 KR 100728866 B1 KR100728866 B1 KR 100728866B1 KR 1020040053543 A KR1020040053543 A KR 1020040053543A KR 20040053543 A KR20040053543 A KR 20040053543A KR 100728866 B1 KR100728866 B1 KR 100728866B1
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South Korea
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current
measuring device
low
current measuring
railway vehicle
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KR1020040053543A
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Korean (ko)
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KR20060004432A (en
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백광선
이강원
권성태
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한국철도기술연구원
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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
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
    • 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
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • 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
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • 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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/62—Testing of transformers

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

본 발명은 저압 전류측정장치를 이용한 철도차량 대전류측정 시스템에 관한 것으로, 저압용 변류기를 이용하여 가선으로부터 철도차량으로 유입되는 고전류를 측정하는 시스템에 관한 것이다. The present invention relates to a railroad car large current measurement system using a low-pressure current measuring device, and to a system for measuring a high current flowing into the railroad car from a wire using a low-voltage current transformer.

본 발명은 철도차량에 전원을 공급하는 가선으로 부터 전원을 공급받는 동도체가 관통되고 상기 동도체를 통해 대전류가 흐르면 일정비율 이하의 소전류로 변환하여 신호선으로 출력하는 저압용 전류측정장치와; 상기 전류측정장치를 상기 동도체와 전기적으로 절연시키도록 절연유가 채워지는 외함과; 상기 외함과 상기 철도차량 사이에 형성되어 상기 전류측정장치로 부터 대전류의 상기 철도차량으로의 유입을 차단하는 절연애관;으로 이루어진 것을 특징으로 한다.The present invention provides a low-voltage current measuring device for converting into a small current of a certain ratio or less when a large current flows through the copper conductor supplied with power from the wire supplying power to the railway vehicle and outputs it as a signal line; An enclosure filled with insulating oil to electrically insulate the current measuring device from the copper conductor; And an insulation pipe formed between the enclosure and the railway vehicle to block inflow of a large current into the railway vehicle from the current measuring device.

본 발명에 따르면 저압용 측정장치를 철도 차량에 적용하여 고전압하에서 저가의 비용으로 대전류를 정밀하게 측정하여 전자파장에(EMI)를 정확히 측정할 수 있다.According to the present invention, by applying a low-voltage measuring device to a railway vehicle, it is possible to accurately measure the electromagnetic wave (EMI) by precisely measuring a large current at low cost under high voltage.

저압, 전류, CTLow pressure, current, CT

Description

저압 전류측정장치를 이용한 철도차량 대전류 측정 시스템{High Current Measuring System of Railway Car Using Low Current Transformer} High Current Measuring System of Railway Car Using Low Current Transformer             

도1은 종래 전류 측정용 고압 전류측정장치(CT)를 도시한 도면이다.1 is a view showing a conventional high-voltage current measuring device (CT) for current measurement.

도2는 종래 철도차량의 변압기별 1차전류 측정치를 도시한 도면이다.2 is a diagram illustrating primary current measurement values for transformers of a conventional railway vehicle.

도3은 통상의 저압용 전류측정장치의 개념도이다.3 is a conceptual diagram of a conventional low pressure current measuring device.

도4는 본 발명에 따른 저압용 전류측정장치를 이용한 고전압 환경하에서의 전류측정 시스템을 도시한 도면이다.4 is a diagram illustrating a current measuring system in a high voltage environment using a low voltage current measuring device according to the present invention.

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

100,300 : 전류측정장치 102, 312 : 절연애관 100,300: current measuring device 102, 312: insulation pipe

104a,104b ; 전류입력단자 106a,106b : 출력단자104a, 104b; Current input terminal 106a, 106b: Output terminal

200 : 변류기 202 : 코아(core)200: current transformer 202: core (core)

204 : 코일(coil) 206, 302 : 동도체204: coil 206, 302: copper conductor

306 : 절연유 310 : 신호선306: insulating oil 310: signal line

314 : 관통홀 316 : 외함314: through hole 316: enclosure

318 : 고정판318: fixed plate

본 발명은 저압 전류측정장치를 이용한 철도차량 대전류측정 시스템에 관한 것으로, 더욱 구체적으로 설명하면, 저압용 변류기를 이용하여 가선으로부터 철도차량으로 유입되는 고전류를 측정하는 시스템에 관한 것이다.The present invention relates to a railroad car large current measurement system using a low-pressure current measuring device, and more particularly, to a system for measuring a high current flowing into a railroad car from a live line using a low-pressure current transformer.

일반적으로 전기철도에서는 철도에 구동전원을 공급하기 위해 설치되는 가선으로부터 전류를 입력받아 추진장치 및 제어전원 등 차량에서 필요한 전원으로 사용한다.In general, electric railroads receive electric current from wires installed to supply driving power to railways and use it as a power source for vehicles such as propulsion devices and control power.

따라서, 이와 같이 전류를 입력받는 과정에서 철도차량으로부터 고조파가 발생하고 이는 가선과 신호에 영향을 주므로 이를 제어하고 확인하는 과정을 거쳐야 한다.Therefore, harmonics are generated from the railroad car in the process of receiving the current, and thus, it has to go through the process of controlling and confirming the harmonics and signals.

그런데, 철도차량에서 입력받는 전원은 AC25,000V 또는 DC1,500V의 고압으로써, 이런 환경에서 가선으로부터 유입되는 전류를 측정하는 경우에 고전압이 각종 계측기로 유입될 수 있으므로 고압용 전류측정장치(CT;Current Transformer)를 별도로 설치를 해야 하는데 전자파 잡음을 발생시키며 공중을 통한 전자파 방사의 형태나 전원선 같은 도선을 통한 전도의 형태로 전달되는 전자파장애(EMI)까지 측정할 수 있는 센서는 고가(高價)이고 특수제작을 해야 한다.By the way, the power input from the railroad vehicle is a high voltage of AC25,000V or DC1,500V, and in the case of measuring the current flowing from the live wire in such an environment, high voltage may be introduced into various measuring instruments, such as a high-voltage current measuring device (CT; Current transformers must be installed separately. Sensors that generate electromagnetic noise and can measure electromagnetic interference (EMI) transmitted in the form of electromagnetic radiation through the air or conduction through conductors such as power lines are expensive. And special production.

따라서, 종래에는 철도차량에 유입되는 전류를 측정하기 위해서는 도1에 도 시한 바와 같이 고전압하에서 사용되는 전류측정장치(Current Transformer)(100)를 이용하여 절연거리를 확보하기 위해 절연애관(102)을 사용, 전류입력단자 (104a, 104b)를 통해 흐르는 대전류를 측정하여 그와 같이 검출된 센싱(sensing)값을 검출하는 출력단자(106a,106b)를 통해 얻을 수 있는 구조를 갖는 고압용 전류측정장치(CT)(100)를 철도차량에 설치하여 사용하였다.Accordingly, in order to measure the current flowing into the railway vehicle, the insulating insulator 102 is used to secure an insulation distance by using a current transformer 100 used under high voltage as shown in FIG. 1. High-voltage current measuring device having a structure that can be obtained through the output terminals 106a and 106b which measure the large current flowing through the current input terminals 104a and 104b and detect the sensed value detected as such. (CT) 100 was used to install on railroad cars.

그런데, 상기 고압용 전류측정장치(CT)(100)는 생산원가와 철도차량의 측정 목적상 정밀도가 높은 센서가 필요없는 관계로 고압 애관(102)을 사용한 저정밀도의 고압용 전류측정장치(CT)(100)이므로 전류의 순간적 변화에 대한 응답과 선형성 등 대전류의 전자파장애(EMI)를 정확하게 측정할 수 없는 문제점을 가지고 있다.However, the high-voltage current measuring device (CT) 100 is a low-precision high-voltage current measuring device (CT) using the high-pressure corrugated pipe 102 because the high-precision sensor is not necessary for the production cost and the rail vehicle measurement purpose. (100), there is a problem that can not accurately measure the electromagnetic interference (EMI) of a large current, such as the response to the instantaneous change of current and linearity.

또한, 고가의 고압용 전류측정장치(CT)(100)는 철도차량의 성능에 맞게 주문 제작되어야 하지만 비용이 고가이고, 제작된 제품의 특성이 정확한지를 검증하는 것이 어려우므로 설치, 시험이 곤란한 실정이다.In addition, an expensive high-voltage current measuring device (CT) 100 has to be made to meet the performance of the railroad car, but it is expensive and difficult to verify whether the characteristics of the manufactured product is accurate, it is difficult to install and test. to be.

그리고, 저전압환경(변압기 접지측)의 전류를 측정하여 고정밀도의 전류를 측정하고자 하는 경우는 있으나 이때는 변압기 1대만의 전류만 측정이 되므로 정확한 전자파장애(EMI)의 측정이 곤란한 상태에 있다고 할 수 있다.In addition, there is a case where a high-precision current is to be measured by measuring current in a low voltage environment (transformer ground side), but at this time, only one transformer is measured so that accurate electromagnetic interference (EMI) is difficult to measure. have.

특히, 고속전철과 같이 1대의 집전장치로 여러대의 변압기 전류를 측정하고자 하는 경우 차량 전체 전자파장애(EMI)를 측정하는 것이 불가능하게 된다. 이는 각 인버터의 스위칭 순간이 다르므로 나타나는 현상이 있기 때문이다.In particular, when trying to measure the current of several transformers with one current collector, such as a high-speed train, it becomes impossible to measure the entire electromagnetic interference (EMI) of the vehicle. This is because there is a phenomenon that occurs because the switching instant of each inverter is different.

즉, 도2에 도시한 바와 같이 차량 1대에서 변압기를 2대 이상 사용할 경우, 변압기 1차측의 전류를 측정했을 때 각 변압기에서의 전류의 형상을 보여주는 것으 로 정확하게 동일한 지점에서 전류가 시작하지 않음을 알 수 있다.That is, when two or more transformers are used in one vehicle as shown in FIG. 2, the current does not start at exactly the same point when the current of each transformer is measured when the current of the primary side of the transformer is measured. It can be seen.

따라서, 본 발명은 이러한 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 충분한 전자파장애(EMI)의 측정능력과 대전류를 감지할 수 있는 저압용 전류측정장치(CT)를 사용하여 고전압 환경에서 대전류를 측정할 수 있는 시스템을 제공하는데 있다.
Accordingly, the present invention has been made to solve this problem, the object of the present invention is to use a low-voltage current measuring device (CT) capable of detecting a sufficient electromagnetic interference (EMI) and a large current in a high voltage environment The present invention provides a system capable of measuring large currents.

본 발명은 저압 전류측정장치를 이용한 철도차량 대전류 측정 시스템에 관한 것으로서, 철도차량에 있어서, 상기 철도차량에 전원을 공급하는 가선으로부터 전원을 공급받는 동도체가 관통되고 상기 동도체를 통해 대전류가 흐르면 일정비율 이하의 소전류로 변환하여 신호선으로 출력하는 저압용 전류측정장치와; 상기 전류측정장치를 상기 동도체와 전기적으로 절연시키도록 절연유가 채워지는 외함과; 상기 외함과 상기 철도차량 사이에 형성되어 상기 전류측정장치로 부터 대전류의 상기 철도차량으로의 유입을 차단하는 절연애관;으로 이루어진 것을 특징으로 한다.The present invention relates to a railroad high current measurement system using a low-pressure current measuring device, in a railroad car, when a copper conductor supplied with power from a wire supplying power to the railroad car passes through and a large current flows through the copper conductor A low voltage current measuring device for converting the signal into a small current of a predetermined ratio or less and outputting the signal line; An enclosure filled with insulating oil to electrically insulate the current measuring device from the copper conductor; And an insulation pipe formed between the enclosure and the railway vehicle to block inflow of a large current into the railway vehicle from the current measuring device.

상기 절연애관은 중앙부에 관통홀을 형성하여 상기 저압용 전류측정장치의 신호선을 상기 상기 관통홀에 통과시키는 것을 특징으로 한다.The insulated via is formed with a through hole in a central portion thereof, and passes the signal line of the low pressure current measuring device through the through hole.

상기 동도체는 순도 100%의 동(銅) 바(bar) 또는 동 케이블(cable) 중에 어느 하나인 것을 특징으로 한다.The copper conductor may be any one of a copper bar or a copper cable having a purity of 100%.

상기 전류측정장치는 관통형 변류기(CT : Current Transformer);인 것을 특 징으로 한다.The current measuring device is characterized in that the through-current transformer (CT: Current Transformer).

본 발명에 따른 저압용 전류측정장치를 이용한 철도차량 대전류 측정 시스템을 첨부한 도면을 참고로 하여 이하에 상세히 기술되는 실시예에 의하여 그 특징들을 이해할 수 있을 것이다.With reference to the accompanying drawings, a railway vehicle large current measuring system using a low-pressure current measuring apparatus according to the present invention will be understood by the embodiments described in detail below.

도3은 통상의 저압용 전류측정장치의 개념도이고, 도4는 본 발명에 따른 저압용 전류측정장치를 이용한 고전압 환경하에서의 전류측정 시스템을 도시한 도면이다.3 is a conceptual diagram of a conventional low pressure current measuring apparatus, and FIG. 4 is a diagram illustrating a current measuring system in a high voltage environment using the low pressure current measuring apparatus according to the present invention.

도3에 따르면, 통상적으로 전류측정장치로 사용되는 변류기(CT ; Current Transformer)(200)는 폐루프형 즉 관통형으로 구성되어 있다.According to FIG. 3, a current transformer (CT) 200 which is typically used as a current measuring device is configured in a closed loop type, that is, a through type.

상기 변류기(CT)(200)는 일반적으로 고전압 및 대전류를 소전압 및 소전류로 변환하는 전류 검출기를 의미하는 것으로서, 상기 변류기(CT)(200)는 원형의 코아(core)(202) 및 상기 코아(202)의 일단에 권취된 코일(coil)(204)로 구성되며, 상기 코아(202)는 변류기(CT)(200)의 종류에 따라 권선형, 막대형, 관통형, 공심형 등의 서로 다른 코아의 형상을 갖는다.The current transformer (CT) 200 generally refers to a current detector that converts a high voltage and a high current into a small voltage and a small current, and the current transformer (CT) 200 includes a circular core 202 and the core. The coil 204 is wound around one end of the core 202, and the core 202 may be wound, rod-shaped, through-type, concentric, etc. according to the type of the current transformer (CT) 200. It has different core shapes.

본 발명의 전류측정장치로 사용되는 변류기(CT)(200)는 관통형 변류기(200)로서, 상기 코아(202)의 중앙부로는 1차측 전원선인 동바 또는 동케이블로 이루어진 동도체(206)가 통과되며, 변류기(CT)(200)의 종류에 따라 상기 코아(202)의 외주로 1차측 전원선이 권취되기도 한다.Current transformer (CT) 200 used as the current measuring device of the present invention is a through-type current transformer 200, the central portion of the core 202 is a copper conductor 206 made of a copper wire or copper cable which is a primary power line Passing through, the primary power line may be wound around the core 202 depending on the type of the current transformer (CT) (200).

상기 1차측 전원선인 동도체(206)로 흐르는 고전압 및 대전류는 상기 권취된 코일(204)로 유기되도록 하되, 그 출력치는 소전압 및 소전류이므로 상기 고전압 및 대전류를 쉽게 검출할 수 있다.The high voltage and the high current flowing through the copper conductor 206, which is the primary power line, are induced in the wound coil 204, and the output values thereof are the low voltage and the low current so that the high voltage and the high current can be easily detected.

물론, 이는 1차측 전원선의 권선비와 2차측 전원선의 권선비에 따라 검출 비율을 달리할 수 있는 것이다.Of course, this may vary the detection ratio according to the turns ratio of the primary power line and the turns ratio of the secondary power line.

도4에 따르면, 본 발명에 적용되는 저전압용 전류측정장치(CT)(300)는 도시철도차량에 적용하여 철도차량의 가선으로부터 공급받는 교류 25,000V 또는 직류 1,500V 의 고전압환경하에서 사용하고자 하는 경우 절연의 문제가 크게 부각된다.According to Figure 4, the low-voltage current measuring device (CT) 300 to be applied to the present invention is applied to a city railway vehicle to use in a high voltage environment of AC 25,000V or DC 1,500V supplied from the railway line of the railway vehicle The problem of insulation is highlighted.

따라서, 집전장치에서 철도차량 내에 있는 변압기에 급전선의 연결 구조에 변형을 가해야 한다.Therefore, the current collector must be modified in the connection structure of the feeder to the transformer in the railway vehicle.

그때, 센서역할을 하는 전류측정장치(CT)(300)의 코어의 중앙에 관통되게 설치되는 동도체(302)로 전류가 흐르도록 해야만 한다.At this time, the current must flow to the copper conductor 302 which is installed to penetrate the center of the core of the current measuring device (CT) 300 that serves as a sensor.

일반적으로 철도차량에서는 대전류가 유입되는 이 부분에 편조쉴드선을 사용하여 선의 움직임이 자유롭게 하여 작업성의 향상을 돕는다.In general, railroad cars use braided shield wire in this part where large current flows in, and the movement of the wire is freed to help improve workability.

그런데, 이와 같은 동도체(302)로 이루어진 편조쉴드선을 센서역할을 하는 전류측정장치(CT)(300)의 코어의 중앙에 관통시킬 경우 철도차량의 이동으로 편조쉴드선이 전류측정장치(CT)(300)의 코어쪽으로 더 가깝게 움직여 절연거리가 절연파괴에 이를 정도로 가깝게 되는 경우 전류측정장치(CT)(300)의 파손이 발생함은 물론이고, 철도차량 내부의 계측장치 및 사용자에 큰 위험이 초래될 수 있다.By the way, when the braided shield wire made of the copper conductor 302 is penetrated to the center of the core of the current measuring device (CT) 300 serving as a sensor, the braided shield wire is moved by the movement of the railway vehicle. Moving closer toward the core of 300) results in a breakage of the current measuring device (CT) 300, as well as a great risk to the measuring device and user inside the railway vehicle. Can be.

따라서, 상기 전류측정장치(CT)(300)의 코어 중심부를 관통하여 대전류가 흐르는 동도체(302)는 단단하면서 저항이 낮은 순도 100%의 동(銅) 바(bar) 또는 동 케이블(cable)을 사용하여 상기 전류측정장치(CT)(300)의 코어 중심부(304)에서 흔들리지 않도록 하는 것이 중요하다.Accordingly, the copper conductor 302, through which a large current flows through the center of the core of the current measuring device (CT) 300, is hard and has a low resistance of 100% copper bar or copper cable. It is important not to shake at the core center 304 of the current measuring device (CT) (300) using.

또한, 공기중의 절연파괴를 막기 위해 센서역할을 하는 상기 전류측정장치 (CT)(300)와 동도체(302)사이에 절연유(306)를 투입하여 절연을 확보하고 공기와 절연물을 동시에 사용하여 이종 절연에 따른 절전강도의 저하를 막는다.In addition, the insulating oil 306 is introduced between the current measuring device (CT) 300 and the copper conductor 302, which serve as a sensor, to prevent insulation breakdown in the air, thereby securing insulation and simultaneously using air and an insulator. Prevents the reduction of power saving intensity due to heterogeneous insulation.

또한, 상기 동도체(302)를 흐르는 전류를 일정 비율 이하로 줄인 전류를 출력하는 신호선(310)을 통한 장치 및 계측 담당자의 위험을 방지하기 위하여 25000V용 절연애관(312)을 철도차량과 센서역할을 하는 상기 전류측정장치(CT)(300) 사이의 지지물로 사용하여 절연시키게 된다.In addition, in order to prevent the risk of the device and the person in charge of the measurement through the signal line 310 that outputs a current that reduces the current flowing through the copper conductor 302 below a predetermined ratio, it serves as a railroad vehicle and a sensor. Insulating is used as a support between the current measuring device (CT) (300).

이때, 절연애관(312)의 중앙에 관통홀(314)를 두고 신호선(310)을 내부로 관통하여 철도차량의 내부로 유입함으로써 절연성에 문제가 없도록 한다.At this time, the through hole 314 in the center of the insulating pipe 312 through the signal line 310 to flow into the interior of the railway vehicle so that there is no problem in insulation.

좀더 구체적으로 설명하면, 도4는 본 발명에 따른 전류측정장치(300)로 전류측정 센서인 관통형 변류기(CT)를 절연유(306)에 집어넣고, 그 사이를 고전압 및 대전류가 흐르는 동도체(302)가 지나가도록 하는 구조를 도시한 도면으로서, 상기 동도체(302)와 전류측정장치(CT)(300) 사이에는 중간의 절연유(306)의 절연이 파손되지 않을 정도의 거리를 유지하도록 해야 한다.More specifically, Figure 4 is a current measuring device 300 according to the present invention, the current measuring sensor through-type current transformer (CT) is inserted into the insulating oil 306, between the high voltage and high current flow copper conductor ( 302) is a diagram showing the structure to pass, the distance between the copper conductor 302 and the current measuring device (CT) 300 should be maintained so that the insulation of the intermediate insulating oil 306 does not break. do.

이??, 상기 절연유(306)의 외부에는 부도체인 외함(316)이 있으며, 상기 외함(316)은 전류측정장치(CT)(300)가 움직이지 않도록 고정하여 주며, 상기 동도체 (302)와 전류측정장치(CT)(300)간의 거리가 변하지 않도록 고정하여 준다.The outer side of the insulating oil 306 is a non-conducting enclosure 316, the enclosure 316 is fixed so that the current measuring device (CT) 300 does not move, the copper conductor 302 And fix the distance between the current measuring device (CT) 300 does not change.

그리고, 도체인 철도차량의 지붕의 고정판(318)과 전류측정장치(CT)(300) 사이에는 절연애관(312)이 있어 센서인 전류측정장치(CT)(300)가 있는 외함(316)을 지지한다.In addition, between the fixing plate 318 of the roof of the conductor railroad car and the current measuring device (CT) 300, there is an insulation pipe 312, so that the enclosure 316 having the current measuring device (CT) 300 as a sensor is provided. I support it.

또한, 상기 전류측정장치(CT)(300)와 절연애관(312) 그리고 외함(316)은 강력한 접착제에 의하여 고정되고, 절연유(306)가 신호선(310)이 통과하는 절연애관 (312)의 중심부의 관통홀(314)로 누유되지 않도록 한다.In addition, the current measuring device (CT) 300, the insulating pipe 312 and the enclosure 316 is fixed by a strong adhesive, the insulating oil 306 is the center of the insulating pipe 312 through which the signal line 310 passes. Do not leak to the through-hole 314 of the.

이상과 같이 본발명의 실시예에 대하여 상세히 설명하였으나, 본 발명의 권리범위는 이에 한정되지 않으며, 본 발명의 실시예와 실질적으로 균등의 범위에 있는 것까지 본 발명의 권리범위가 미친다.Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to the range substantially equivalent to the embodiments of the present invention.

이상의 설명에서 알 수 있는 바와 같이, 본 발명에 따르면 저압용 측정장치를 철도차량에 적용하여 고전압하에서 저가의 비용으로 대전류를 정밀하게 측정하여 전자파장애(EMI)를 정확히 측정할 수 있다.As can be seen from the above description, according to the present invention, by applying a low pressure measuring apparatus to a railway vehicle, it is possible to accurately measure electromagnetic interference (EMI) by precisely measuring a large current at low cost under high voltage.

또한, 변압기 별로 전류의 전자파장애(EMI)를 측정하는 변압기 간의 전류 값의 차이로 인한 부정확한 데이터의 측정을 막을 수 있고, 집전장치가 1개인 경우 차량 전체의 전류를 측정하여 차량 전체의 입력, 역률 등을 계산 및 활용할 수 있게 된다.In addition, it is possible to prevent inaccurate data measurement due to the difference in the current value between the transformer measuring the electromagnetic interference (EMI) of the current for each transformer.In the case of one current collector, the current of the entire vehicle by measuring the current of the entire vehicle, Power factor can be calculated and utilized.

아울러, 이와 같이 측정된 전자파장애(EMI)는 가선으로 유입되는 차량 전체 의 값이므로 차량 추진장치의 제어 알고리즘의 변경 또는 변전소에서 전자파를 제거하기 위한 노력에 도움을 줄 수 있게 된다.In addition, since the measured electromagnetic interference (EMI) is the value of the entire vehicle flowing into the line, it can help in the change of the control algorithm of the vehicle propulsion device or the effort to remove the electromagnetic waves from the substation.

Claims (4)

철도차량에 있어서, In railroad cars, 상기 철도차량에 전원을 공급하는 가선으로 부터 전원을 공급받는 동도체가 관통되고 상기 동도체를 통해 대전류가 흐르면 일정비율 이하의 소전류로 변환하여 신호선으로 출력하는 저압용 전류측정장치와;A low-voltage current measuring device for converting a small current below a predetermined ratio into a signal line when a large conductor flows through the copper conductor supplied with power from the wire supplying power to the railway vehicle; 상기 전류측정장치를 상기 동도체와 전기적으로 절연시키도록 절연유가 채워지는 외함과;An enclosure filled with insulating oil to electrically insulate the current measuring device from the copper conductor; 상기 외함과 상기 철도차량 사이에 형성되어 상기 전류측정장치로 부터 대전류의 상기 철도차량으로의 유입을 차단하고, 중앙부에 관통홀을 형성하여 상기 저압용 전류측정장치의 신호선을 상기 관통홀에 통과시키는 절연애관;으로 이루어진 것을 특징으로 하는 저압용 전류측정장치를 이용한 철도차량 대전류 측정 시스템.It is formed between the enclosure and the railway vehicle to block the inflow of a large current from the current measuring device to the railway vehicle, and forms a through hole in the center to pass the signal line of the low-pressure current measuring device through the through hole. Railroad vehicle large current measurement system using a low-pressure current measuring device characterized in that consisting of; 삭제delete 삭제delete 삭제delete
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JP2002214254A (en) 2001-01-22 2002-07-31 Kyuki:Kk Arrester type power transmission/distribution line current/voltage measuring apparatus and power transmission/distribution line current/voltage measuring system using the same
KR20030072150A (en) * 2002-03-05 2003-09-13 주식회사 시스하이텍 Test system and method of a power supply
KR20040045614A (en) * 2002-11-25 2004-06-02 디이시스 주식회사 3φ current measuring apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002214254A (en) 2001-01-22 2002-07-31 Kyuki:Kk Arrester type power transmission/distribution line current/voltage measuring apparatus and power transmission/distribution line current/voltage measuring system using the same
KR20030072150A (en) * 2002-03-05 2003-09-13 주식회사 시스하이텍 Test system and method of a power supply
KR20040045614A (en) * 2002-11-25 2004-06-02 디이시스 주식회사 3φ current measuring apparatus

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