KR101433813B1 - Equipotential grounding short-circuiting and over-voltage protection system of rails in dc electric railways - Google Patents

Equipotential grounding short-circuiting and over-voltage protection system of rails in dc electric railways Download PDF

Info

Publication number
KR101433813B1
KR101433813B1 KR1020140064255A KR20140064255A KR101433813B1 KR 101433813 B1 KR101433813 B1 KR 101433813B1 KR 1020140064255 A KR1020140064255 A KR 1020140064255A KR 20140064255 A KR20140064255 A KR 20140064255A KR 101433813 B1 KR101433813 B1 KR 101433813B1
Authority
KR
South Korea
Prior art keywords
voltage
rail
ground
potential difference
equipotential
Prior art date
Application number
KR1020140064255A
Other languages
Korean (ko)
Inventor
강인권
Original Assignee
주식회사 강이엠테크
강인권
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 강이엠테크, 강인권 filed Critical 주식회사 강이엠테크
Priority to KR1020140064255A priority Critical patent/KR101433813B1/en
Application granted granted Critical
Publication of KR101433813B1 publication Critical patent/KR101433813B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M5/00—Arrangements along running rails or at joints thereof for current conduction or insulation, e.g. safety devices for reducing earth currents
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/30—Railway vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present invention discloses an equipotential grounding short-circuiting and over-voltage protection system of rails in a DC electric railway which preferentially prevents a dangerous potential difference between the rails of the DC electric railway or an electric railway vehicle and a steel structure of a platform, and detects and controls an over voltage of the rails. The equipotential grounding short-circuiting and over-voltage protecting system of rails in a DC electric railway according to the present invention includes a DC voltage detector to detect a voltage between the rail and a steel structure which is adjacent to the rail; a DC current detector to detect a current; and an over voltage controller which receives detection values from the DC voltage detector and the DC current detector to control a ground. When a potential difference between the rail and the steel structure is equal to or greater than a preset reference value, the equipotential grounding short-circuiting and over-voltage protecting system are operated as a closed circuit to short-circuit an equipotential ground. A DC electronic contactor performing connection with a dedicated ground and a thyristor are connected to a voltage fuse in parallel so that the equipotential grounding short-circuiting and over-voltage protecting system are operated as the closed circuit due to different conditions and is multiply grounding short-circuited.

Description

직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치{EQUIPOTENTIAL GROUNDING SHORT-CIRCUITING AND OVER-VOLTAGE PROTECTION SYSTEM OF RAILS IN DC ELECTRIC RAILWAYS}TECHNICAL FIELD [0001] The present invention relates to an equipotential grounding short-circuit and over-voltage protection device for a railway electric railway rail,

본 발명은 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치에 관한 것으로, 레일이나 전기철도차량과 레일 부근의 철제 구조물, 특히 승강장의 철제 구조물 사이의 접촉 위험전위차를 하용 접촉전압 기준치 및 허용 통전시간 이하로 우선적으로 억제하고, 레일의 과전압을 검출 제어할 수 있는 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치에 관한 것이다.
The present invention relates to an equipotential ground short circuit and overvoltage protection device for a direct current railway rail, and more particularly, to a railway or electric railway vehicle and a steel structure in the vicinity of a rail, particularly a contact danger potential difference between an iron structure of a landing pad, To an equipotential ground short circuit and overvoltage protection device of a direct current railway rail capable of detecting and controlling an overvoltage of a rail.

주지된 바와 같이, 직류 전기철도의 레일은 완전 비접지, 즉 완전 부동 접지 시스템(Total Floating Grounding System)이며, 이러한 레일 위를 달리는 전기철도차량의 차체는 철제 차륜에 의해 레일과 등전위가 되어 있다.As is well known, the rails of DC electric railways are completely ungrounded, that is, the Total Floating Grounding System, and the body of an electric railway vehicle running on such a rail is equipotential with the rail by iron wheels.

그러나 승강장의 철제 구조물들은 이러한 레일이나 차량과 전기적 및 물리적으로 완전히 분리되어 있기 때문에 열차 운행시 승강장의 철제 구조물과 전기철도차량 사이에는 전위차가 발생할 수 있다.However, since the iron structure of the platform is completely separated electrically and physically from such a rail or vehicle, a potential difference may occur between the iron structure of the platform and the electric railway vehicle when the train is operated.

따라서 이러한 전위차에 의해 승강장의 승객이나 작업자에 대하여 감전 등의 안전사고가 발생할 수 있고, 승강장에서 전기철도차량에 출입하는 휠체어 등에 의한 단락 아크의 발생으로 화상, 화재 등의 안전사고가 발생할 수 있는 문제점이 있다.Therefore, it is possible to cause a safety accident such as electric shock to the passenger or the worker on the platform by the potential difference, and a safety accident such as an image or a fire may occur due to the occurrence of a short arc caused by a wheelchair entering or exiting the railroad vehicle .

이러한 문제점을 해소하기 위하여 레일의 전위를 검출하고 제어하는 기술들이 제안된바 있으며, 그 대표적인 예로 대한민국 등록특허공보 제10-1080265호(발명의 명칭 : 레일전위 상승 시 지락사고와 비지락사고 상태 구분이 가능한 레일 전위 제어 시스템 ; 이하 ‘특허문헌 1’이라 함)가 있으며, 특허문헌 1은 도 1로 도시한 바와 같이, 레일(A)과 대지(B) 사이의 전위차를 검출하는 전위차 검출부(110)와, 접지 스위치(130)에 흐르는 전류를 검출하고 검출된 전류값을 접지스위치 제어부(100)로 전달하는 전류 검출부(120)와, 접지스위치 제어부에 의해 스위칭 동작되어 레일(A)과 대지(B)를 차단시키는 접지스위치와, 차단기(210)를 동작시키고 전류 검출부에서 검출된 전류값을 전달받아 중앙 제어부(300)로 전달하는 차단기 제어부(200)와, 레일(A)과 전차선(C)을 차단시키는 차단기(210)와, 차단기 제어부(200)에서 받은 전류값을 토대로 레일(A)의 상태가 지락사고 인지 비지락사고 상태 인지를 판단하고 차단기(210) 투입 제어 명령을 차단기 제어부(200)로 전달하는 중앙 제어부(300)를 포함하여 구성된 레일 전위제어 시스템이다.In order to solve such a problem, technologies for detecting and controlling the potential of a rail have been proposed. For example, Korean Patent Registration No. 10-1080265 (entitled " 1, there is a potential difference detecting unit 110 (hereinafter, referred to as " rail potential detecting unit ") for detecting a potential difference between the rail A and the ground B, A current detector 120 for detecting a current flowing through the ground switch 130 and transmitting the detected current value to the ground switch controller 100; A breaker control unit 200 that operates the breaker 210 and receives the current value detected by the current detector and transmits the current value to the central control unit 300; Block And determines whether the state of the rail A is a ground fault or a non-ground fault based on a current value received from the breaker control unit 200. The breaker control unit 200 And a central control unit (300) for transmitting the control signals.

이러한 특허문헌 1은 레일전위가 상승하였을 때 전류 검출부에서 접지스위치를 통과하는 전류값을 측정하여 그 측정 결과를 토대로, 중앙 제어부에서 지락사고 또는 비지락사고 상태를 판단하여 사고 구간에만 차단기를 선택적으로 투입시켜 보다 안정적이고 효율적으로 전기 철도 직류 급전시스템을 운영할 수 있는 효과가 있다.In this patent document 1, a current value passing through a ground switch is measured at a current detecting portion when a rail potential rises, and a ground fault or non-ground fault is determined at a central control portion based on the measurement result. It is possible to operate the electric railway direct current feeding system more stably and efficiently.

그러나 특허문헌 1은 레일과 대지 사이의 전위차를 검출하는 것이기 때문에 대지 접지가 이루어지지 않은 승강장의 철제 구조물과의 전위차는 검출할 수 없다는 문제점이 있으며, 또한 지락사고일 때에만 차단기를 투입하는 것이어서 승강장과 레일 사이의 전위차에 의한 안전사고는 방지할 수 없다는 문제점이 있다.
However, since the patent document 1 detects the potential difference between the rail and the ground, there is a problem in that a potential difference between the ground structure and the iron structure of the landing ground can not be detected. In addition, There is a problem that a safety accident caused by a potential difference between the rail and the rail can not be prevented.

1. 대한민국 등록특허공보 제 10-1080265호 등록공보(2011.11.8 공고)1. Korean Registered Patent Publication No. 10-1080265 Registered Publication (published Nov. 11, 2011)

상기의 종래 기술이 가지는 문제점을 해결하기 위한 본 발명은, 직류 전기철도의 레일이나 전기철도차량과 승강장의 철제 구조물 사이의 위험전위차를 다단계의 전압구간 및 허용 지속시간으로 구분하고, 각 전압 구간별로 접지동작 시간을 제어하여 높은 위험전위차를 허용 지속시간 이내로 우선적으로 억제하고, 레일의 과전압을 검출 제어하는 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치를 제공하는데 그 목적이 있다.
In order to solve the problems of the prior art, the present invention divides a danger potential difference between a rail of a direct current electric railway or an electric railway vehicle and an iron structure of a platform into a multi-stage voltage section and an allowable duration, The present invention provides an overvoltage protection device for a grounding short-circuit and overvoltage of a direct current railway rail, which controls grounding operation time, suppresses a high danger potential difference within an allowable duration, and detects and controls an overvoltage of a rail.

상기 목적을 달성하기 위한 본 발명의 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치는, 레일과 상기 레일에 근접한 철제 구조물 사이에서 전압을 검출하는 직류전압검출기와, 전류를 검출하는 직류전류검출기 및 상기 직류전압검출기와 직류전류검출기의 검출값을 입력받아 접지 제어를 실시하는 과전압제어부가 구성된 과전압 보호장치에 있어서, 상기 레일과 철제 구조물 간의 전위차가 설정된 기준전압 이상이 되면 허용 지속시간 이내에 폐로되어 등전위 접지 단락을 수행하고 전용접지에 접지접속을 수행하는 직류전자접촉기와 사이리스터가 병렬로 연결되어 다중으로 접지 단락되며, 상기 사이리스터와 직렬로 연결되어 사이리스터의 폐로 시 여자되어 직류전자접촉기를 폐로상태로 작동시키는 코일이 구비된 것을 특징으로 한다.
In order to achieve the above object, an equipotential ground short-circuit and overvoltage protection device of a direct current railway rail of the present invention includes a direct current voltage detector for detecting a voltage between a rail and an iron structure close to the rail, And an overvoltage protection unit configured to receive a detection value of the DC voltage detector and the DC current detector and to perform ground control, wherein the overvoltage protection unit is closed within an allowable duration when the potential difference between the rail and the iron structure exceeds a set reference voltage, A dc electromagnetic contactor performing a short to ground and a ground connection to a dedicated ground and a thyristor are connected in parallel to be short-circuited in multiple, and connected in series with the thyristor to be excited when the thyristor is closed to operate the dc contactor in a closed state And a coil .

본 발명에 따르면 위험전위차를 다단계로 구분하여 직류전자접촉기와 사이리스터의 동작을 제어 가능하고, 각 단계별로 접지동작 시간을 제어하여 높은 위험전위차를 허용 지속시간 이내로 우선적으로 억제하므로 인체 접촉시에 안전 기준치인 안전한 저전위 유지가 가능하게 되는 것이며, 승강장의 철제 구조물과 같은 레일에 근접 시설물의 접지상태에 관계없이 등전위 접지 단락으로 직류 전기철도의 레일(전기철도차량)과의 전위차를 허용 안전 기준치 이하로 경감하여 전기철도차량에 출입하는 승객 등의 감전 등 안전사고를 방지할 수 있고, 승강장의 철제 구조물과 전기철도차량 사이에서 휠체어 등과 같은 금속 접촉에 의한 단락 아크 사고를 방지할 수 있는 효과가 있다.According to the present invention, the operation of the DC magnetic contactor and the thyristor can be controlled by dividing the danger potential difference into a multi-stage, and the ground operation time is controlled at each step to preferentially suppress the high danger potential difference within the allowable duration. (Electric railway vehicle) with an equipotential grounding short-circuit, regardless of the grounding condition of the nearby facility, to the same rail as the iron structure of the landing pad. It is possible to prevent a safety accident such as an electric shock in passengers entering and leaving the electric railway vehicle and to prevent a short-circuit arc accident caused by a metal contact such as a wheelchair between the iron structure of the landing pad and the electric railway vehicle.

또한 본 발명은 접지저항 설정이 가능한 전용 접지에 의해 직접 접지되므로 레일전압 제한치 설정이 용이하고, 레일전압 제한치 설정 제어로 레일전위 경감이 가능하여 레일 보수원이나 관리자의 안전을 확보할 수 있다.In addition, since the present invention is directly grounded by a dedicated ground capable of setting the grounding resistance, it is easy to set the rail voltage limit value, and the rail potential reduction can be achieved by setting the rail voltage limit value.

더욱이 본 발명은 피뢰기를 설치하지 않으므로 상시에는 레일의 완전 부동 접지상태(완전 비접지 상태)를 유지할 수 있고 피뢰기에 의한 상시 누설전류를 방지할 수 있게 되는 등의 유용한 효과가 있다.
In addition, since the present invention does not include a lightning arrester, it is possible to maintain the fully floating ground state (completely non-grounded state) of the rail at all times and to prevent the leakage current by the lightning arrester at all times.

도 1은 종래 기술(특허문헌 1)의 구성을 나타내는 구성도.
도 2는 본 발명에 의한 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치의 전체적인 구성을 예시하는 구성도.
도 3은 본 발명에 의한 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치의 구체적인 실시예를 나타내는 회로도.BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram showing a configuration of a conventional technique (Patent Document 1); Fig.
2 is a block diagram illustrating the overall configuration of an equipotential ground short circuit and overvoltage protection device of a direct current railway rail according to the present invention.
3 is a circuit diagram showing a concrete embodiment of an equipotential ground short-circuit and over-voltage protection device of a direct current railway rail according to the present invention.

본 발명은 다양한 변경을 가할 수 있고 여러 가지 실시예를 가질 수 있는 바, 이하에서는 본 발명의 바람직한 형태의 구조를 도 2 내지 도 6에서 예시하고 이에 기하여 본 발명을 상세하게 설명하고자 한다. 그러나 이는 본 발명을 예시된 형태만으로 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위는 예시된 형태의 통상적인 변경이나 균등물 내지 대체물까지 포함한다.BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: FIG. It should be understood, however, that there is no intention to limit the invention to the form just described, and the spirit and scope of the present invention encompasses the ordinary variations, equivalents, and alternatives of the illustrated forms.

본 발명에 의한 직류 전기철도 레일(10)의 등전위 접지 단락 및 과전압 보호장치의 구체적인 실시예의 전체적인 구성을 도 2로 도시하고 구체적인 회로도를 도 3으로 예시하였다.The overall configuration of a concrete embodiment of the equipotential ground short-circuit and over-voltage protection device of the direct current railway rail 10 according to the present invention is shown in Fig. 2 and a specific circuit diagram is shown in Fig.

이에서 볼 수 있는 바와 같이, 본 발명에 의한 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치는 레일(10)과 대지 접지(70) 및 상기 레일(10)에 근접된 철제 구조물(20) 사이의 전압을 검출하는 직류전압검출기(40)와, 전류를 검출하는 직류전류검출기(50) 및 상기 직류전압검출기(40)와 직류전류검출기(50)의 검출값을 입력받아 접지 제어를 실시하는 과전압제어부(30)로 구성된다.As can be seen, the equipotential ground short-circuit and overvoltage protection device of the direct current railway rail according to the present invention is provided between the rail 10 and the earth ground 70 and between the steel structure 20 adjacent to the rail 10 A DC current detector 50 for detecting a current and a DC voltage detector 40 for detecting a voltage of the DC voltage detector 40 and the DC current detector 50, And a control unit 30.

상기 레일(10)과 철제 구조물(20) 간의 전위차가 설정된 기준전압 이상이 되면 허용 지속시간 이내에 폐로되어 등전위 접지 단락을 수행하고 전용접지에 접지접속을 수행하는 직류전자접촉기(60)와 사이리스터(61) 및 전압퓨즈(63)가 병렬로 연결되어 서로 다른 조건에 의해 폐로로 작동되어 다중으로 접지 단락된다.When the potential difference between the rail 10 and the steel structure 20 becomes equal to or higher than the set reference voltage, the DC electromagnetic contactor 60 closes within the allowable duration and performs grounding at the equipotential ground, And the voltage fuse 63 are connected in parallel and are operated as closed circuits under different conditions so as to be short-circuited in multiple ways.

상기 사이리스터(61)와 직렬로 연결되어 사이리스터(61)의 폐로 시 여자되어 직류전자접촉기(60)를 폐로상태로 작동시키는 코일(62)이 구비될 수 있다.A coil 62 connected in series with the thyristor 61 and excited when the thyristor 61 is closed to operate the DC contactor 60 in a closed state may be provided.

여기서 상기 철제 구조물(20)은 승강장의 스크린 도어와 같은 철제 구조물을 비롯하여 레일(10)에 근접하게 설치된 모든 철제 구조물(20)을 포함하는 것이다.Here, the iron structure 20 includes iron structures such as a screen door of a platform, and all steel structures 20 installed close to the rail 10.

이를 각 구성요소별로 더욱 상세하게 설명하면 다음과 같다.This will be described in more detail with respect to each component.

본 발명에 의한 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치는 도 3의 회로도로 예시한 바와 같이, 레일측을 레일(10)의 임피던스 본드 또는 레일에 직접 접속하고, 접지측은 승강장 안전문, 손잡이 등과 같은 상기 레일(10)에 근접된 철제 구조물(20)에 접속하며, 상기 레일(10)과 철제 구조물(20) 간의 전위차가 설정된 기준전압 이상이 되면 단락 접지 되도록 접치측을 전용접지(70)에 직접접지하여서 된 것이고, 상기 직류전자접촉기(60), 사이리스터(61) 및 전압퓨즈(63)는 모두 상시 개로(Normal Open) 상태이다.The equipotential ground short-circuit and overvoltage protection apparatus of the direct current railway rail according to the present invention is such that the rail side is directly connected to the impedance bond or the rail of the rail 10 as illustrated in the circuit diagram of FIG. 3, Such as a handle or the like and connected to the iron structure 20 adjacent to the rail 10. When the potential difference between the rail 10 and the iron structure 20 becomes equal to or higher than a set reference voltage, The direct current electromagnetic contactor 60, the thyristor 61, and the voltage fuse 63 are all in a normally open state.

여기에서 상기 기준전압은 인체 허용 접촉전압 기준치인 60V 이하로 설정하는 것이 바람직하며, 상기 전용접지(70)는 접지저항의 조정을 통해 기준전압의 기준치를 용이하게 가변 설정할 수 있고, 아래의 식 1에 의한 계산이나 시뮬레이션 수행으로 기준전압(Eg)이 60V일 때를 기준으로 상시 누설전류(Ig)가 최소화 되도록 접지저항(Rg)을 조정하는 것이 가능하다.Here, it is preferable that the reference voltage is set to 60 V or less, which is the reference value of the allowable contact voltage of the human body, and the reference value of the reference voltage can be easily changed by adjusting the grounding resistance of the dedicated ground 70, It is possible to adjust the grounding resistance R g so that the normal leakage current I g is minimized on the basis of when the reference voltage E g is 60 V.

Eg = Ig × Rg -------------------------------<식 1>E g = I g x R g - & lt ; EMI ID =

또한, 상기 직류전압검출기(40)는 상기 레일(10)과 철제 구조물(20) 간의 전위를 검출하여 과전압제어부(30)에 입력하며, 상기 과전압제어부(30)는 레일(10)과 철제 구조물(20) 간의 전위차인 상기 검출값이 설정된 기준전압 이상이면 기준시간 후에 직류전자접촉기(60)를 작동시켜 접지 단락을 수행한다.The direct current voltage detector 40 detects the potential between the rail 10 and the steel structure 20 and inputs the detected voltage to the overvoltage control unit 30. The overvoltage control unit 30 controls the rail 10 and the steel structure 20 20), if the detected value is equal to or higher than the set reference voltage, the DC commutator 60 is operated after the reference time to perform the ground short circuit.

즉, 상기 전위차가 150V 이상 500V 미만이면 100ms 내지 300ms 범위(최대 허용 지속시간 300ms)에서 동작시켜 직류전자접촉기(60)가 폐로 상태가 되도록 하고, 상기 전위차가 500V 이상이면 100ms 이내(최대 허용 지속시간 100ms)로 사이리스터(61)가 순시 동작되어 폐로 상태가 되도록 하는 것이며, 상기 전압퓨즈(63)는 상기 직류전자접촉기(60)와 병렬로 연결되어 레일(10)과 철제 구조물(20) 간의 전위차가 120V 이상 150V 미만이면 300ms 내지 기준시간 범위(최대 허용 지속시간: 300ms) 이내로 폐로 동작되고, 접지된 후 전위차가 기준전압 미만이면 개로 상태로 복귀되는 것이다.That is, when the potential difference is 150V or more and less than 500V, it is operated in the range of 100ms to 300ms (maximum allowable duration 300ms) to make the DC electromagnetic contactor 60 to be in a closed state. If the potential difference is 500V or more, The voltage fuse 63 is connected in parallel to the DC electromagnetic contactor 60 so that the potential difference between the rail 10 and the steel structure 20 is If the voltage is 120V or more and less than 150V, it is operated in the range of 300ms to within the reference time range (maximum allowable duration: 300ms), and when the potential difference is less than the reference voltage after grounding, it returns to the open state.

상기 기준전압이 60V로 설정되면, 기본동작은 상시 열차운행상태인 부하상태에서 직류전압검출기(40)에 의해 레일(10)과 철제 구조물(20) 사이의 전위가 60V 이상으로 검출되면 과전압제어부(30)에 의해 직류전자접촉기(60)가 1초 후에 동작하여 레일(10)과 철제 구조물(20)이 연결되는 폐로상태(Normal Closed)가 되고 동시에 전용접지(70)에 직접접지된 상태가 되는 것이다.When the reference voltage is set to 60 V, the basic operation is performed when the potential between the rail 10 and the steel structure 20 is detected to be 60 V or more by the DC voltage detector 40 in a load state, The DC electromagnetic contactor 60 is operated after one second to be in a closed state in which the rail 10 and the steel structure 20 are connected to each other and is directly grounded to the dedicated ground 70 will be.

이때 상기 검출값이 120V 이상이면 기본동작이 동작되기 전인 1초 이전에 300ms(허용 지속시간 300ms)에서 전압퓨즈(63)가 순시 동작하여 회로가 폐로상태가 되어 접지되는 제1순시동작이 동작된다.At this time, if the detection value is 120V or more, the voltage fuse 63 is instantaneously operated 300ms (allowable duration 300ms) one second before the basic operation is performed, and the first instantaneous operation in which the circuit is closed and grounded is operated .

상기 검출값이 150V 이상이면 과전압제어부(30)가 300ms 내지 100ms 이내(최대 허용 지속시간 300ms)에 직류전자접촉기(60)를 즉시 동작시켜 회로가 폐로상태가 되어 접지되는 제2순시동작이 동작된다.If the detection value is 150 V or more, the overvoltage control unit 30 immediately operates the DC electromagnetic contactor 60 within 300 ms to 100 ms (maximum allowable duration 300 ms), and the second instantaneous operation in which the circuit is closed and grounded is operated .

또한, 직류 전기철도 회로 고장 또는 상기 검출값이 500V 이상의 높은 위험전위차가 검출되면 100ms 이내(허용 지속시간 100ms)에 즉시 사이리스터(61)를 동작시켜 회로가 폐로상태가 되어 접지되는 제3순시동작이 동작된다.When the DC electric rail circuit breakdown or a high danger potential difference of 500 V or more is detected, the thyristor 61 is immediately operated within 100 ms (allowable duration 100 ms), and the third instantaneous operation in which the circuit is closed and grounded .

더욱이 상기 제3순시동작은 대부분 직류 전기철도 회로 고장의 경우가 많으므로 사이리스터(61)가 순시 동작하여 회로가 단락상태가 되면 상기 사이리스터(61)와 직렬로 접속된 코일(62)이 여자되어 직류전자접촉기(60)를 폐로 동작시키므로 이중으로 접지 및 등전위 접속을 수행한다.Further, when the thyristor (61) is momentarily operated and the circuit is short-circuited, the coil (62) connected in series with the thyristor (61) is excited so that the direct current Since the electromagnetic contactor 60 is operated to be closed, double grounding and equipotential connection are performed.

이상과 같은 폐로동작 후 접지되어 직류전압검출기(40)에 의한 전압 검출값이 기준전압인 60V 미만이고 직류전류검출기(50)에 의한 전류 검출값이 상시 누설전류 미만이 되면 설정된 일정시간 경과 후 과전압제어부(30)의 제어에 의해 직류전자접촉기(60)와 사이리스터(61)가 개로상태(Normal Open) 상태로 복귀동작을 수행하게 된다.If the voltage detection value by the DC voltage detector 40 is less than the reference voltage of 60 V and the current detection value by the DC current detector 50 is less than the normal leakage current after the closing operation as described above, The controller 30 controls the DC electromagnetic contactor 60 and the thyristor 61 to return to the normal open state.

이와 같이 본 발명에 의한 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치는 기본동작 이외에 상기 제1, 2, 3순시동작과 같이 검출값인 위험전위차를 다단계로 구분하여 순시동작을 제어 가능하고, 각 단계별로 접지동작 시간을 제어하여 높은 위험전위차를 허용 지속시간 이내로 우선적으로 억제하므로 인체 접촉 안전 기준치인 안전한 저전위 유지가 가능하게 되는 것이며, 병렬로 구성된 직류전자접촉기(60), 사이리스터(61) 및 전압퓨즈(63)를 복합적으로 동작시켜 신속하고 다중 단락회로 구성으로 안전성을 향상시킬 수 있는 것이다.As described above, the equipotential ground short-circuit and over-voltage protection device of the direct current electric railway rail according to the present invention is capable of controlling the instantaneous operation by dividing the dangerous potential difference, which is the detection value, into multiple stages such as the first, second and third instantaneous operations, The DC contactor 60, the thyristor 61 and the thyristor 61, which are configured in parallel, are capable of maintaining a safe low potential level, which is a human contact safety standard value, by controlling the grounding operation time for each step by preferentially suppressing a high danger potential difference within an allowable duration. And the voltage fuse 63, so that safety can be improved quickly and in a multiple short circuit configuration.

또한 승강장의 철제 구조물(20)과 같은 레일(10)에 근접 시설물의 접지상태에 관계없이 등전위 접지 단락으로 전기철도의 레일(10) 또는 전기철도차량과의 전위차를 안전 기준치 이하로 경감하여 전기철도차량에 출입하는 승객 등의 감전 등의 안전사고를 방지할 수 있고, 승강장의 철제 구조물(20)과 전기철도차량 사이에서 휠체어 등과 같은 금속 접촉에 의한 단락 아크 사고를 방지할 수 있다.Also, irrespective of the grounding state of the nearby facility, the electric railway 10 is prevented from being damaged by the equipotential grounding short-circuit to reduce the potential difference between the electric railway rail 10 and the electric railway vehicle to below the safety reference value, It is possible to prevent a safety accident such as an electric shock of passengers entering or exiting the vehicle and prevent a short-circuit arc accident caused by metal contact such as a wheel chair between the iron structure 20 of the landing area and the electric railway vehicle.

아울러 상기 과전압제어부(30)는 원격지의 서버와 통신하는 통신부와 표시부를 더 구비할 수 있다.In addition, the overvoltage control unit 30 may further include a communication unit for communicating with a remote server and a display unit.

이 경우 직류전압검출기(40)와 직류전류검출기(50)의 검출값을 표시하거나 서버로 전송하고, 직류전자접촉기(60)와 사이리스터(61)의 동작을 표시하거나 서버로 전송하여 동작상태 모니터링 및 로그 관리가 가능하며, 이상 발생 시 모니터링 정보 또는 로그 정보를 관리자의 휴대통신단말기에 전송하거나 알림을 실시할 수 있어서 유지관리의 신속성 및 편의성을 향상시킬 수 있다.In this case, the detection values of the DC voltage detector 40 and the DC current detector 50 are displayed or transmitted to the server, and the operation of the DC electromagnetic contactor 60 and the thyristor 61 is displayed or transmitted to the server, Log management can be performed, and monitoring information or log information can be transmitted to the portable communication terminal of the manager or can be notified when an abnormality occurs, so that the speed and convenience of maintenance can be improved.

이와 같이 상술한 설명은 본 발명의 기술 사상을 보인 한정된 실시 예에 따라 설명하였으나, 본 발명은 특정의 실시 예나 수치에 한정되지 아니하며, 실시 예들의 구성요소 일부를 변경, 혼합하는 등, 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 다양한 변형실시가 가능하고, 그러한 변형 실시는 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어서는 안 될 것이다.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims. It will not.

10... 레일
20... 철제 구조물
30... 과전압제어부
40... 직류전압검출기
50... 직류전류검출기
60... 직류전자접촉기
61... 사이리스터
62... 코일
63... 전압퓨즈
70... 전용접지10 ... rails
20 ... iron structure
30 ... overvoltage control section
40 ... DC voltage detector
50 ... DC current detector
60 ... DC Magnetic Contactor
61 ... thyristor
62 ... coil
63 ... voltage fuse
70 ... dedicated ground

Claims (4)

레일과 상기 레일에 근접된 철제 구조물 사이에서 전압을 검출하는 직류전압검출기와, 전류를 검출하는 직류전류검출기 및 상기 직류전압검출기와 직류전류검출기의 검출값을 입력받아 접지 제어를 실시하는 과전압제어부가 구성된 과전압 보호장치에 있어서,
상기 레일과 철제 구조물 간의 전위차가 설정된 기준전압 이상이 되면 폐로되어 등전위 접지 단락을 수행하고 전용접지에 접지접속을 수행하는 직류전자접촉기와 사이리스터가 병렬로 연결되어 다중으로 접지 단락되고,
상기 사이리스터와 직렬로 연결되어 사이리스터의 폐로 시 여자되어 직류전자접촉기를 폐로상태로 작동시키는 코일이 구비되며,
상기 과전압제어부는 레일과 철제 구조물 간의 전위차가 기준전압 이상이면 기준시간 후에 직류전자접촉기를 작동시켜 접지 단락을 수행하되,
상기 전위차가 150V 이상 500V 미만이면 100ms 내지 300ms 범위에서 동작되어 직류전자접촉기가 폐로 상태가 되도록 하고,
상기 전위차가 500V 이상이면 100ms 이내로 사이리스터가 순시 동작되어 폐로 상태가 되도록 한 것을 특징으로 하는 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치.
A DC voltage detector for detecting a voltage between a rail and an iron structure adjacent to the rail; a DC current detector for detecting a current; and an overvoltage controller for receiving a detection value of the DC voltage detector and the DC current detector to perform ground control In the overvoltage protection device configured,
Wherein when the potential difference between the rail and the steel structure is equal to or greater than a set reference voltage, the dc electromagnetic contactor and the thyristor are connected in parallel to short-circuit the equipotential ground and perform ground connection to the exclusive ground,
A coil connected in series with the thyristor and excited when the thyristor is closed to operate the DC electromagnetic contactor in a closed state,
Wherein the overvoltage control unit operates the DC electromagnetic contactor after the reference time when the potential difference between the rail and the iron structure is equal to or higher than the reference voltage,
And when the potential difference is 150V or more and less than 500V, it is operated in the range of 100ms to 300ms so that the DC electromagnetic contactor is brought into the closed state,
And when the potential difference is 500 V or more, the thyristor is instantaneously operated within 100 ms so as to be in the closed state, and the equipotential ground short-circuit and overvoltage protection device of the direct current railway rail.
삭제delete 제 1 항에 있어서,
상기 직류전자접촉기와 병렬로 연결되어 레일과 철제 구조물 간의 전위차가 120V 이상 150V 미만이면 300ms 내지 기준시간 범위 이내로 동작되어 폐로 시키는 전압퓨즈가 구성됨을 특징으로 하는 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치.
The method according to claim 1,
And a voltage fuse that is operated in a range of 300 ms to within a reference time range when the potential difference between the rail and the iron structure is in a range of 120 V to 150 V is connected to the direct current electromagnetic contactor in parallel to constitute a voltage fuse for closing the equipotential grounding and overvoltage protection Device.
제 1 항에 있어서,
상기 전용접지는 Eg = Ig × Rg 식에 의해 기준전압을 설정할 수 있도록 접지저항의 조정이 가능한 것임을 특징으로 하는 직류 전기철도 레일의 등전위 접지 단락 및 과전압 보호장치.The method according to claim 1,
Wherein the exclusive ground is capable of adjusting a grounding resistance so that a reference voltage can be set by E g = I g x R g .
KR1020140064255A 2014-05-28 2014-05-28 Equipotential grounding short-circuiting and over-voltage protection system of rails in dc electric railways KR101433813B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140064255A KR101433813B1 (en) 2014-05-28 2014-05-28 Equipotential grounding short-circuiting and over-voltage protection system of rails in dc electric railways

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140064255A KR101433813B1 (en) 2014-05-28 2014-05-28 Equipotential grounding short-circuiting and over-voltage protection system of rails in dc electric railways

Publications (1)

Publication Number Publication Date
KR101433813B1 true KR101433813B1 (en) 2014-08-26

Family

ID=51751252

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140064255A KR101433813B1 (en) 2014-05-28 2014-05-28 Equipotential grounding short-circuiting and over-voltage protection system of rails in dc electric railways

Country Status (1)

Country Link
KR (1) KR101433813B1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108429228A (en) * 2018-04-02 2018-08-21 中铁第四勘察设计院集团有限公司 Split-phase Over-voltage Analysis method is crossed in a kind of electric railway
CN110920470A (en) * 2019-12-13 2020-03-27 西南交通大学 Electric traction locomotive operation overvoltage suppression control system and method
WO2020063572A1 (en) * 2018-09-29 2020-04-02 成都中工电气工程有限公司 Novel rail over-voltage protection device
CN112421593A (en) * 2020-11-16 2021-02-26 福州地铁集团有限公司 Steel rail potential limiting device and control method
KR20220138657A (en) * 2021-04-06 2022-10-13 동산엔지니어링 주식회사 Protective relay system for detecting ground fault in electric vehicle feed line and control method thereof
CN117117807A (en) * 2023-08-29 2023-11-24 通号（长沙）轨道交通控制技术有限公司 Rail potential limiting device and switching-on and switching-off control loop and method thereof
KR20240097135A (en) * 2022-12-20 2024-06-27 주식회사 그라운드 Apparatus for preventing electric shock accident between train and platform safety door

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR830001386Y1 (en) * 1982-04-28 1983-08-06 신영전기주식회사 Power saving device for home trance
KR200454627Y1 (en) 2011-06-24 2011-07-14 이성열 Rail potential reduction device
KR101080265B1 (en) * 2010-08-25 2011-11-08 한국철도기술연구원 Rail potential control system capable of distinguishing between ground fault and non-ground fault when rising from the rail potential
KR101355944B1 (en) 2012-03-16 2014-02-04 인텍전기전자 주식회사 Directional selective ground relay system and control method in dc traction power supply system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR830001386Y1 (en) * 1982-04-28 1983-08-06 신영전기주식회사 Power saving device for home trance
KR101080265B1 (en) * 2010-08-25 2011-11-08 한국철도기술연구원 Rail potential control system capable of distinguishing between ground fault and non-ground fault when rising from the rail potential
KR200454627Y1 (en) 2011-06-24 2011-07-14 이성열 Rail potential reduction device
KR101355944B1 (en) 2012-03-16 2014-02-04 인텍전기전자 주식회사 Directional selective ground relay system and control method in dc traction power supply system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108429228A (en) * 2018-04-02 2018-08-21 中铁第四勘察设计院集团有限公司 Split-phase Over-voltage Analysis method is crossed in a kind of electric railway
CN108429228B (en) * 2018-04-02 2019-07-19 中铁第四勘察设计院集团有限公司 Split-phase Over-voltage Analysis method is crossed in a kind of electric railway
WO2020063572A1 (en) * 2018-09-29 2020-04-02 成都中工电气工程有限公司 Novel rail over-voltage protection device
CN110920470A (en) * 2019-12-13 2020-03-27 西南交通大学 Electric traction locomotive operation overvoltage suppression control system and method
CN112421593A (en) * 2020-11-16 2021-02-26 福州地铁集团有限公司 Steel rail potential limiting device and control method
KR20220138657A (en) * 2021-04-06 2022-10-13 동산엔지니어링 주식회사 Protective relay system for detecting ground fault in electric vehicle feed line and control method thereof
KR102544683B1 (en) 2021-04-06 2023-06-20 동산엔지니어링 주식회사 Protective relay system for detecting ground fault in electric vehicle feed line and control method thereof
KR20240097135A (en) * 2022-12-20 2024-06-27 주식회사 그라운드 Apparatus for preventing electric shock accident between train and platform safety door
KR102680524B1 (en) * 2022-12-20 2024-07-04 (주)그라운드 Apparatus for preventing electric shock accident between train and platform safety door
CN117117807A (en) * 2023-08-29 2023-11-24 通号（长沙）轨道交通控制技术有限公司 Rail potential limiting device and switching-on and switching-off control loop and method thereof
CN117117807B (en) * 2023-08-29 2024-06-11 通号（长沙）轨道交通控制技术有限公司 Rail potential limiting device and switching-on and switching-off control loop and method thereof

Similar Documents

Publication Publication Date Title
KR101433813B1 (en) Equipotential grounding short-circuiting and over-voltage protection system of rails in dc electric railways
EP3041016B1 (en) Dc circuit breaker and circuit breaking method of the dc circuit breaker
US11190003B2 (en) Method for controlling a charging device of a vehicle and charging device of a vehicle for charging an electrical energy storage device of the vehicle
EP3041101B1 (en) System for improving lightning immunity for a solid state power controller
FI124423B (en) Elevator system which includes a security arrangement for monitoring the electrical safety of an elevator
KR100766365B1 (en) delta;I GROUND FAULT PROTECTIVE RELAYING SYSTEM AND CONTROL METHOD IN DC TRACTION POWER SUPPLY SYSTEM
AU2014204920B2 (en) Measurement arrangement and method for detecting an AC voltage as a rail potential in DC railway systems and use of the measurement arrangement
EP3203251B1 (en) Shared transient voltage suppressor for protecting multiple load channels of a solid state power controller having built-in-test capability
IL224228A (en) Continuous uninterruptable ac grounding system for power system protection
WO2018198438A1 (en) Dc ground fault detection system and dc ground fault detection method for dc electric railway
CN105514926A (en) Method for recovering power supply after stripping started by direct-current ground protection
WO2011036287A1 (en) Short-circuiting device
KR100696984B1 (en) Pilot ground fault protective relaying scheme in traction power supply system
KR100602914B1 (en) Ground overcurrent protective relaying schemes for ungrounded DC power supply system and the controlling method for the system
KR100694279B1 (en) Ground fault protective relaying method using distance relay in traction power supply system
JP2018036054A (en) Earth detector, ground fault protection device, and method for detecting ground fault
US20170261541A1 (en) Ground fault detector and method for detecting ground faults
CN109617021B (en) Grounding detection protection method for traction converter of railway vehicle
KR101303840B1 (en) Arc flash energy calculation method for arc flash detection and cutoff
KR200454627Y1 (en) Rail potential reduction device
CN107462803A (en) A kind of magnetic suspension train supply line plus earth selection method
KR101840288B1 (en) Electrical leakage current circuit breaker
CN105896466A (en) Ground protection device and ground protection method of train assistant system
JP5035520B2 (en) Ground fault protection discharge device
CN115943317A (en) Method for detecting an insulation fault in an electrical system on board a vehicle and vehicle overvoltage protection circuit

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20180814

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20190806

Year of fee payment: 6