WO2005119871A1 - Systeme de relais de protection contre des courts-circuits a la masse directionnels et differentiels, pour systeme d'alimentation en puissance de traction en cc non mis a la terre, et appareil a relais de protection contre des courts-circuits a la masse pour detecter des courants de court-circuit a la masse - Google Patents

Systeme de relais de protection contre des courts-circuits a la masse directionnels et differentiels, pour systeme d'alimentation en puissance de traction en cc non mis a la terre, et appareil a relais de protection contre des courts-circuits a la masse pour detecter des courants de court-circuit a la masse Download PDF

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Publication number
WO2005119871A1
WO2005119871A1 PCT/KR2004/003369 KR2004003369W WO2005119871A1 WO 2005119871 A1 WO2005119871 A1 WO 2005119871A1 KR 2004003369 W KR2004003369 W KR 2004003369W WO 2005119871 A1 WO2005119871 A1 WO 2005119871A1
Authority
WO
WIPO (PCT)
Prior art keywords
ground fault
protective relay
current
occurred
substation
Prior art date
Application number
PCT/KR2004/003369
Other languages
English (en)
Inventor
Sang-Gi Chung
Rag-Gyo Jeong
An-Ho Lee
Yeon-Soo Kim
Original Assignee
Korea Railroad Research Institute
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 Korea Railroad Research Institute filed Critical Korea Railroad Research Institute
Priority to JP2007514887A priority Critical patent/JP2008502291A/ja
Publication of WO2005119871A1 publication Critical patent/WO2005119871A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/38—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to both voltage and current; responsive to phase angle between voltage and current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems

Definitions

  • the present invention relates to a ground fault protective relay apparatus for an electric railroad in which the negative bus of a rectifier is grounded through a resistor and a current limiting device to detect a ground fault current for operating the ground fault protective relay apparatus in an ungrounded Direct Current (DC) traction power feed system.
  • the current limiting device exhibits a high resistance characteristic during normal operation, thus limiting the leakage current to a reference value or less, whereas the current limiting device exhibits a low resistance characteristic at the time of occurrence of a ground fault, thus allowing a ground fault current, whose amount is sufficient to allow a ground fault to be detected, to flow.
  • whether a ground fault has occurred is determined by comparing a ground fault current value, which is detected with respect to a substation, with a reference current value.
  • the side and section in which the ground fault has occurred are determined by comparing the sum of current values flowing through feeders and return lines on the right side and the sum of current values flowing through feeders and return lines on the left side with respect to the substation, and determining whether a ground fault sensing signal has been received from a neighboring substation.
  • a traction power feed system for an electric railroad is installed along a railroad line to supply power to the train.
  • the traction power feed system is equipped with substations in appropriate respective sections.
  • Each of the substations rectifies Alternating Current (AC) power to DC power and provides the DC power to the train via a DC distribution panel and a feeder.
  • AC Alternating Current
  • a ground fault protective relay apparatus detects the accident and quickly cuts off the supply of the power to protect various equipment and secure public safety.
  • an ungrounded system is used to prevent electro-chemical corrosion of an underground metallic object.
  • the resistor is disposed between the earth and the negative bus of the rectifier and the resistance value of the resistor is low, the corrosion of the underground metallic object, i.e., electro-chemical corrosion, may occur.
  • a ranning rail is used as a return circuit, a leakage current becomes high, so that a problem arises in that serious electro-chemical corrosion may occur.
  • an object of the present invention is to provide a ground fault protective relay apparatus for a directional and differential ground fault protective relay system, in which a ground resistor of the ground fault protective relay apparatus is disposed between the negative bus of a rectifier and the earth, and a current limiting device is connected in series to the ground resistor, thus preventing electro-chemical corrosion attributable to the leakage current that may occur when a ground resistance value is low.
  • the current limiting device exhibits a high resistance characteristic during normal operation, thus limiting the leakage current to a reference value or less, whereas the current limiting device exhibits a low resistance characteristic at the time of occurrence of a ground fault, thus allowing a ground fault current, whose amount is sufficient to allow the ground fault to be detected, to flow.
  • the present invention is advantageous in that the rated load of the ground resistor can be reduced using the current limiting device.
  • Another object of the present invention is to provide a directional and differential ground fault protective relay system and method of detecting a ground fault, in which whether the ground fault has occurred is determined by comparing a current value, which enters through a ground resistor, with a reference current value, and the section in which the ground fault has occurred is determined by comparing the sum of the values of currents flowing through feeder and a return line on the left side with the sum of the values of currents flowing through feeders and return lines on the right side with respect to the substation, and determining whether a ground fault sensing signal has been received from a neighboring substation.
  • the present invention provides a ground fault protective relay apparatus for an ungrounded DC traction power feed system, wherein a negative bus of a rectifier is grounded via a current limiting device to detect a ground fault current.
  • the present invention provides a directional and differential ground fault protective relay system, including a ground fault protective relay apparatus in which a negative bus of a rectifier is grounded via a current limiting device to detect a ground fault current; a detection unit for detecting current values flowing through feeders and return lines connected to substations, and the value of a leakage current flowing through a current limiting device; a detenriination unit for determining whether a ground fault has occurred by comparing the value of the leakage current flowing through the current limiting device with a reference current value, and determining the side and section in which the ground fault has occurred by comparing the sum of the values of currents flowing through the feeders and return lines on a left side and the sum of the values of currents flowing through the feeders and return lines on a right side, and using a ground fault sensing signal received from a neighboring substation; a transceiver unit for transmitting a ground fault sensing signal to a substation adjacent to the side in which the ground fault has occurred, according to
  • the present invention provides a ground fault protection method, including the steps of detecting the value of a leakage current flowing through a current limiting device of a ground fault protective relay apparatus of a substation, and the values of currents flowing through feeders and return lines on right and left sides; determining the occurrence of a ground fault by comparing the detected leakage current value with a reference current value; detenmning the side in which the ground fault has occurred by comparing the sum of the values of currents flowing through feeders and return lines on a left side and the sum of the values of currents flowing through feeders and return lines on the right side; determining the section where the ground fault has occurred by transmitting a ground fault sensing signal to a substation adjacent to the side in which the ground fault has occurred, and determining whether the ground fault sensing signal has been received from a substation in the corresponding side; and tripping feeder breakers on the side in which the ground fault has occurred.
  • a current limiting device is connected to a directional and differential ground fault protective relay system, so that the current limiting device lowers a leakage earth current to a reference value or less during normal operation, whereas the current limiting device allows a ground fault current, whose amount is sufficient to allow a ground fault current to be detected, to flow at the time of occurrence of a ground fault.
  • FIG. 1 is a view illustrating the connection between the negative bus of a rectifier and a ground resistor;
  • FIG. 2 is a block diagram of a directional and differential ground fault protective relay system according to the present invention;
  • FIG. 3 is a diagram showing the locations of the current sensors of the directional and differential ground fault protective relay system in an electric railroad DC traction power feed system in accordance with the present invention;
  • FIG. 4 is a circuit diagram illustrating the ground configuration of the directional and differential ground fault protective relay system according to the present invention; [25] FIG.
  • FIG. 5 is a characteristic curve of a current limiting device of the directional and differential ground fault protective relay system according to the present invention, which shows an example in which the current limiting device can be used in a DC 750V system; and [26] FIG. 6 is a flowchart illustrating the operation of the directional and differential ground fault protective relay system according to the present invention.
  • FIG. 6 Best Mode for Carrying Out the Invention
  • the ground resistor of a ground fault protective relay apparatus is disposed between the earth and the negative bus of a rectifier to detect a ground fault current, and a current limiting device 80 is connected in series to the ground resistor.
  • the resistance value of the ground resistor shown in FIG. 4 acts as a factor to limit the amount of the ground fault current at the time of the occurrence of a ground fault. Therefore, the resistance value of the ground resistor must be selected so that the amount of ground fault current detected by a current sensor is sufficient to determine the occurrence of the ground fault and the side in which the ground fault has occurred. If the resistance value is excessively low, the rated load of the resistor become excessively high and thus become inefficient.
  • a current limiting device 'X' which is newly added in the present invention, exhibits a high resistance characteristic during normal operation, thus limiting a leakage current to a reference value or less; whereas the current limiting device 'X' exhibits a low resistance characteristic at the time of the occurrence of a ground fault, thus allowing ground fault current, whose amount is sufficient to allow a ground fault to be detected, to flow.
  • a relay resistor When the case of a 750 V DC light rail transit system whose maximum load current is 2000 A is taken as an example, a relay resistor must have a resistance value of 75 ohms or less to allow a ground fault current of a minimum 10 A to flow. In this case, when the resistor is directly connected between the DC negative bus and the earth, the leakage current becomes high and, thus, an electro-chemical corrosion problem may occur. However, when a current limiting device having a characteristic shown in FIG. 5 is connected in series to the relay resistor, the leakage current is limited to 10 mA or less during normal operation, and the ground fault current of 10A flows at the time of occurrence of a ground fault. It is also possible to lower the resistance value and the rated load of the relay resistor.
  • FIG. 2 is a block diagram of a directional and differential ground fault protective relay system according to the present invention.
  • FIG. 3 is a diagram showing the locations of the current sensors of the directional and differential ground fault protective relay system in an electric railroad DC traction power feed system according to the present invention.
  • the directional and differential ground fault protective relay system includes a detection unit 10 for detecting the values of currents I to I and 1 8 a ground fault current I that flow through feeders and return lines connected to g substations, a determination unit 20 for determining whether a ground fault has occurred based on the ground fault current value I detected by the detection unit 10, g comparing the sum of the values of currents flowing through feeders and return lines on a left side and the sum of the values of currents flowing through feeders and return lines on a right side, and determining the side and section where the ground fault has occurred based on the ground fault sensing signal of a neighboring substation that is received from a transceiver unit 30, the transceiver unit 30 for transmitting the ground fault sensing signal to a substation adjacent to the location where the ground fault has occurred, or receiving a ground fault sensing signal from a neighboring substation in accordance with the determination result of the determination unit 20, a feeder breaker controller 40 for controlling feeder breakers, which
  • the determination unit 20 compares the ground fault current I , which is detected g by the detection unit 10, with a reference current I to determine whether a ground SET fault has occurred, and compares the sum I +1 +1 +1 of the values of currents, which 1 2 3 4 flow through the feeders and the return lines on the right side, and the sum I +1 +1 +1 5 6 7 8 of the values of currents, which flow through the feeders and the return lines on the left side, to determine the side in which the ground fault has occurred.
  • the directional and differential ground fault protective relay system transmits a ground fault sensing signal through the transceiver unit 30 to the directional and differential ground fault protective relay system of a substation adjacent to the left side identical to the side in which the fault has occurred.
  • the substation located on the left side transmits the ground fault sensing signal to the directional and differential ground fault protective relay system of the substation located on the right side.
  • the directional and differential ground fault protective relay system installed in the substation determines that the ground fault has occurred in a neighboring section on the left side, based on the current value detected in its location, the ground fault sensed on the left side, and the ground fault sensing signal received from the substation adjacent to the left side.
  • the directional and differential ground fault protective relay system determines that the ground fault did not occur in a neighboring section. In this case, an optional time delayed backup trip routine installed in the system to prepare for a possible ground fault in the system itself is executed.
  • the directional and differential ground fault protective relay system separates a ground fault point from the system by tripping the feeder breakers, which supply power from the neighboring substation toward the side in which the ground fault has occurred, through the feeder breaker controller 40.
  • the reclosing logic unit 50 performs a reclosing logic and the reclosing determination unit 60 determines a correct line in which the ground fault has occurred.
  • the traction power feed system can be divided into a right traction power feed system and a left traction power feed system with respect to a substation B.
  • the total amount of current that flow in all the directions is always 0 according to Kirchhoff s First Law.
  • the side in which the ground fault has occurred can be determined by comparing the sum I +1 +1 +1 of the current values on the right side and the sum I +1 1 2 3 4 5 6 +1 +1 of the current values on the left side. 7 8
  • a ground fault sensing signal is transmitted to the directional and differential ground fault protective relay system of a substation C adjacent to the right side.
  • the ground fault sensing signal is transmitted to the substation B adjacent to the left side.
  • the substation B adjacent to the left side determines whether the ground fault has occurred in the section between the substation B and the substation C, based on both the ground fault sensing signal locally sensed and the ground fault sensing signal received from the neighboring substation C on the right side, and then trips both the feeder breakers B and B on the right side.
  • FIG. 6 is a flowchart illustrating the operation of the directional and differential ground fault protective relay system according to the present invention.
  • the operation of the directional and differential ground fault protective relay system includes the steps of detecting the value of a ground fault current flowing through the ground resistor of the relay system of a substation, and the values of currents flowing through feeders and return lines on right and left sides, comparing the ground fault current value and a reference current value to determine whether a ground fault has occurred, comparing the sum of the current values flowing through the feeders and the return lines on the left side and the sum of the current values flowing through the feeders and the return lines on the right side to determine the side in which the ground fault has occurred, transmitting a ground fault sensing signal to a substation adjacent to the side in which the ground fault has occurred based on the determined side, and dete ⁇ riining a faulty section by determining whether the ground fault sensing signal has been received from a substation in a corresponding side, and then tripping feeder breakers on the side of the ground faulty section.
  • the directional and differential ground fault protective relay system continuously detects current values I to I flowing through the feeders and the return lines on the 1 8 right and left sides with respect to substations and also detects earth leakage current value I flowing through the ground resistor at step S100.
  • the system determines whether a ground fault has occurred by comparing the ground fault current value I with the reference current value I at step S200. If it is g SET determined that the ground fault current value I is lower than the reference current g value I , the system determines that it is in a normal state and continues to measure SET the current values I to I and the earth leakage current values I . 1 8 g
  • the directional and differential ground fault protective relay system compares the sum I +1 +1 +1 of the values of currents flowing through the feeders and 1 2 3 4 the return lines on the right side and the sum I +1 +1 +1 of the values of currents 5 6 7 8 flowing through the feeders and the return lines on the left side at step S300. [66] If, as a result of the comparison, the sum I +1 +1 +1 of the current values on the 1 2 3 4 right side is greater than the sum I +1 +1 +1 of the current values on the left side, the 5 6 7 8 directional and differential ground fault protective relay system determines that the ground fault has occurred on the right side.
  • the directional and differential ground fault protective relay system transmits a ground fault sensing signal to the directional and differential ground fault protective relay system of a substation adjacent to the right side at step S400.
  • the substation adjacent to the right side also determines whether a ground fault sensing signal has been received at step S410. If the ground fault sensing signal has been received from the neighboring substation on the right side, the directional and differential ground fault protective relay system determines that the ground fault has occurred in a neighboring section on the right side of the substation and thus trips both feeder breakers B and B on the right side at step S420. 1 2
  • the directional and differential ground fault protective relay system executes the optional time delayed backup trip routine installed in the system for the purpose of back-up protection.
  • the directional 1 2 and differential ground fault protective relay system After the feeder breakers B and B on the right side are all tripped, the directional 1 2 and differential ground fault protective relay system performs the reclosing logic of one of the up and down lines to determine which of the two railroad lines has the ground fault at step S600.
  • the directional and differential ground fault protective relay system determines whether the feeder breakers for the up line have been successfully reclosed by performing the reclosing logic at step S700. If it is determined that the feeder breakers for the up line have been successfully reclosed, the directional and differential ground fault protective relay system determines that a ground fault did not occur in the feeder for the up line at step S800.
  • the directional and differential ground fault protective relay system determines that a ground fault has occurred in the feeder for the up line at step S900.
  • the di- 5 6 7 8 rectional and differential ground fault protective relay system determines that the ground fault has occurred on the left side.
  • the directional and differential ground fault protective relay system transmits a ground fault sensing signal to the directional and differential ground fault protective relay system of a substation adjacent to the left side at step S500.
  • the directional and differential ground fault protective relay system determines whether a ground fault sensing signal has been received from the substation adjacent to the left side at step S510. If the ground fault sensing signal has been received from the substation adjacent to the left side, the directional and differential ground fault protective relay system determines that a ground fault has occurred in a neighboring section on the left side of the substation, and then trips both feeder breakers B and B on the right side at step S520. 3 4
  • the directional and differential ground fault protective relay system executes the optional time delayed backup trip routine installed in the system for the purpose of back-up protection. After both the feeder breakers B and B for the left side are tripped, the directional and differential ground 3 4 fault protective relay system performs a reclosing logic for one of the up and down lines to determine which of the two lines has the ground fault at step S600.
  • the directional and differential ground fault protective relay system determines whether the feeder breakers for the up line have been successfully reclosed by performing the reclosing logic at step S700. If the feeder breakers for the up line have not been successfully reclosed, the directional and differential ground fault protective relay system determines that a ground fault did not occur in the feeder for the up line at step S800.
  • the directional and differential ground fault protective relay system determines that a ground fault has occurred in the feeder for the up line at step S900.
  • a current limiting device is connected to a directional and differential ground fault protective relay system, so that the current limiting device lowers a leakage earth current to a reference value or less during normal operation, whereas the current limiting device allows a ground fault current, whose amount is sufficient to allow a ground fault current to be detected, to flow at the time of occurrence of a ground fault.
  • the present invention provides a ground fault protective relay apparatus for an ungrounded DC traction power feed system, wherein a negative bus of a rectifier is grounded via a current limiting device to detect a ground fault current.

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  • Emergency Protection Circuit Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

L'invention concerne un appareil à relais de protection contre des courts-circuits à la masse pour chemins de fer électriques. Dans l'appareil à relais de protection contre des courts-circuits à la masse, le bus négatif d'un redresseur est mis à la masse au moyen d'une résistance et d'un dispositif limitateur de courant afin de détecter un courant de court-circuit à la masse et de mettre en fonctionnement l'appareil à relais de protection contre des courts-circuits à la masse dans un système d'alimentation en puissance de traction en CC non mis à la masse. Le dispositif limitateur de courant a une caractéristique de résistance élevée en fonctionnement normal de façon à limiter le courant de fuite à une valeur égale ou inférieure à une valeur de référence, alors que le courant limitateur de courant présente une caractéristique de résistance réduite en présence d'un courant de court-circuit, de façon à permettre à un courant de court-circuit à la masse d'une intensité suffisante pour permettre de détecter un court-circuit à la masse de couler.
PCT/KR2004/003369 2004-06-03 2004-12-21 Systeme de relais de protection contre des courts-circuits a la masse directionnels et differentiels, pour systeme d'alimentation en puissance de traction en cc non mis a la terre, et appareil a relais de protection contre des courts-circuits a la masse pour detecter des courants de court-circuit a la masse WO2005119871A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007514887A JP2008502291A (ja) 2004-06-03 2004-12-21 非接地の直流牽引力供給システムのための方向性差動地絡保護リレーシステム及び地絡電流の検知のための地絡保護リレー装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2004-0040502 2004-06-03
KR1020040040502A KR100582214B1 (ko) 2004-06-03 2004-06-03 비접지 ｄｃ급전계통에서의 방향차동지락보호계전시스템및 지락전류검출을 위한 전류제한수단

Publications (1)

Publication Number Publication Date
WO2005119871A1 true WO2005119871A1 (fr) 2005-12-15

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PCT/KR2004/003369 WO2005119871A1 (fr) 2004-06-03 2004-12-21 Systeme de relais de protection contre des courts-circuits a la masse directionnels et differentiels, pour systeme d'alimentation en puissance de traction en cc non mis a la terre, et appareil a relais de protection contre des courts-circuits a la masse pour detecter des courants de court-circuit a la masse

Country Status (3)

Country Link
JP (1) JP2008502291A (fr)
KR (1) KR100582214B1 (fr)
WO (1) WO2005119871A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7969696B2 (en) 2007-12-06 2011-06-28 Honeywell International Inc. Ground fault detection and localization in an ungrounded or floating DC electrical system
WO2018154170A1 (fr) * 2017-02-23 2018-08-30 Adif- Entidad Publica Empresarial Administrador De Infraestructuras Ferroviarias Système permettant la détection de coupures dans des câbles conducteurs de négatif et de courants de fuite dans des installations électriques
CN114744587A (zh) * 2022-02-28 2022-07-12 湖南恒信电气有限公司 轨道交通供电选择性接地漏电保护控制装置和控制方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100602914B1 (ko) * 2004-06-26 2006-07-19 한국철도기술연구원 비접지 디씨(ｄｃ) 급전시스템의 지락 과전류 보호계전시스템과 지락 과전류 보호계전 제어방법
KR100755452B1 (ko) * 2004-11-15 2007-09-05 한국철도기술연구원 비접지 ｄｃ급전시스템에서의 모선차동보호계전기시스템및 그 제어방법
KR100696984B1 (ko) * 2005-06-18 2007-03-20 한국철도기술연구원 전기철도용 직류 급전계통에서의 지락보호계전시스템 및 그제어방법
KR100766365B1 (ko) * 2006-07-06 2007-10-12 한국철도기술연구원 전기철도용 직류급전계통에서의 델타아이지락보호계전시스템 및 그 제어방법
KR20100088481A (ko) * 2009-01-30 2010-08-09 전명수 3상 전력 케이블 배전 시스템
KR101407718B1 (ko) * 2012-12-18 2014-06-13 부산교통공사 고무타이어 방식의 경량전철 부극 전위 안정화 장치
CN105119251B (zh) * 2015-07-23 2018-04-13 华南理工大学 一种适用柔性直流配电系统接地电阻方案的确定方法
CN110571769B (zh) * 2019-03-19 2021-10-22 许继集团有限公司 一种用于输电线路的差动保护方法及装置
JP7537343B2 (ja) 2021-03-31 2024-08-21 株式会社明電舎 直流き電システムの地絡検出装置および地絡検出方法
CN114256814B (zh) * 2021-12-03 2023-06-27 国网河南省电力公司电力科学研究院 一种分段母线的多级限流保护方法及配置系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60160328A (ja) * 1984-01-31 1985-08-21 株式会社東芝 直流地絡故障検出装置
JPH02311123A (ja) * 1989-05-26 1990-12-26 Toshiba Corp 直流地絡故障検出装置
JP2810277B2 (ja) * 1992-08-07 1998-10-15 株式会社日立製作所 電気鉄道用電力設備における事故判定装置
JP2000156928A (ja) * 1998-11-18 2000-06-06 Meidensha Corp 事故点推定直流接地検出方式
JP3848854B2 (ja) * 2001-07-17 2006-11-22 財団法人鉄道総合技術研究所 直流電気鉄道高圧地絡による支障の拡大防止回路
JP3895148B2 (ja) * 2001-10-29 2007-03-22 財団法人鉄道総合技術研究所 直流き電回路の地絡による変電所遮断器の不要動作防止装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
HEILIG T ET AL: "Tri-met Portland light rail system experience with nuisance tripping of track-to-earth potential relay-a case study.", IEEE RAIL CONFERENCE., 2002, pages 131 - 150 *
NATARAJAN R ET AL: "Short circuit currents of the SEPTA traction power distribution system.", IEEE., 1994, pages 15 - 21 *
PHARM KD ET AL: "Operation and safety Considerations in designing a ligh rail DC traction electrification system.", IEEE RAIL CONFERENCE., 22 April 2003 (2003-04-22) - 24 April 2003 (2003-04-24), pages 171 - 189 *

Cited By (4)

* Cited by examiner, † Cited by third party
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US7969696B2 (en) 2007-12-06 2011-06-28 Honeywell International Inc. Ground fault detection and localization in an ungrounded or floating DC electrical system
US7986500B2 (en) 2007-12-06 2011-07-26 Honeywell International Inc. Ground fault detection in an ungrounded electrical system
WO2018154170A1 (fr) * 2017-02-23 2018-08-30 Adif- Entidad Publica Empresarial Administrador De Infraestructuras Ferroviarias Système permettant la détection de coupures dans des câbles conducteurs de négatif et de courants de fuite dans des installations électriques
CN114744587A (zh) * 2022-02-28 2022-07-12 湖南恒信电气有限公司 轨道交通供电选择性接地漏电保护控制装置和控制方法

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