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WO2012044031A2 - Dispositif de commande de protection de ct automatique destiné à faire face de manière active à une erreur humaine dans un système de distribution - Google Patents

Dispositif de commande de protection de ct automatique destiné à faire face de manière active à une erreur humaine dans un système de distribution Download PDF

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Publication number
WO2012044031A2
WO2012044031A2 PCT/KR2011/007084 KR2011007084W WO2012044031A2 WO 2012044031 A2 WO2012044031 A2 WO 2012044031A2 KR 2011007084 W KR2011007084 W KR 2011007084W WO 2012044031 A2 WO2012044031 A2 WO 2012044031A2
Authority
WO
WIPO (PCT)
Prior art keywords
relay
control device
current
mof
automatic protection
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2011/007084
Other languages
English (en)
Korean (ko)
Other versions
WO2012044031A3 (fr
Inventor
김석곤
박창호
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Korea Electric Power Corp
Original Assignee
Korea Electric Power Corp
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 Electric Power Corp filed Critical Korea Electric Power Corp
Publication of WO2012044031A2 publication Critical patent/WO2012044031A2/fr
Publication of WO2012044031A3 publication Critical patent/WO2012044031A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G01R15/142—Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26

Definitions

  • the present invention relates to a control system for active response of distribution system human error and automatic CT protection.
  • CTs used in distribution systems such as digital substations and CTs in MOFs, which are used as accessory materials for distribution equipment such as power meters and protection relays, are used to prevent damages or failures during operation or maintenance of related equipment. For prevention, always keep the drawer circuit connected to the CT short circuited.
  • CT circuit protection connecting pins are artificially connected in order to short the wiring circuit in the terminal block on the CT drawing circuit side when performing work.
  • a worker may accidentally omit the connection work, or a case in which sufficient connection may not be made due to immature work, which may result in a safety accident such as equipment damage or electric shock.
  • the present invention provides a control system for automatic CT protection of a distribution system human error active response system in which a CT drawing circuit is automatically maintained in a short state.
  • the current sensing unit for sensing the current flowing through the extension between the measuring instrument and the MOF, converts the sensed current to generate current data which is a digital signal
  • a control unit that receives the current data from the A / D converter, and generates a short signal or an open signal for shorting or opening the extension based on the received current data and the short signal or the open signal
  • the relay output unit for controlling the relay based on.
  • the current detection unit may detect a current flowing in the extension by using a current detection sensor provided in the extension between the measuring device and the MOF.
  • the relay output unit may short-circuit the S wiring and the L wiring by changing a relay provided between the S wiring and the L wiring of the internal line to an ON state.
  • the relay output unit may open the S wiring and the L wiring by changing a relay provided between the S wiring and the L wiring of the internal line to an OFF state.
  • control unit may transmit an open signal for changing the relay corresponding to the extension to the OFF state to the relay output unit.
  • the apparatus may further include an external button formed to be exposed to the outside of the CT auto-protection control device to receive a relay open command from a user and transmit the received relay open command to the controller.
  • control unit may generate the open signal for changing the relay to the OFF state when the relay open command is transmitted.
  • the CT automatic protection control device may be configured to be coupled to at least one of the power circuit portion of the electronic electricity meter, the power circuit portion of the automated switchgear and the terminal portion of the MOF.
  • the present invention is not limited to the embodiments disclosed below, but may be configured in various forms, such as embodied in an electronic power meter, a power circuit part of an automated switchgear, a terminal part of a MOF, and the like. It is provided to make the disclosure complete and to fully inform the scope of the invention to those skilled in the art.
  • CT automatic protection control device can prevent accidents due to short-circuit (short) work due to carelessness or mistake of the operator.
  • the CT burnout automatic protection control device can prevent the damage of the current transformer for the instrument included in the transformer for the instrument can prevent power accidents such as ripple failure and power failure.
  • FIG. 1 is a block diagram showing a test terminal block having a CT automatic protection control device according to an embodiment of the present invention.
  • FIG. 2 is a view showing a configuration example of a test terminal block equipped with a CT automatic protection control device according to an embodiment of the present invention.
  • FIG. 3 is a detailed configuration of the CT automatic protection control device according to an embodiment of the present invention.
  • FIG. 4 is a detailed configuration diagram of a CT automatic protection control device according to another embodiment of the present invention.
  • one component when one component is referred to as “connected” or “connected” with another component, the one component may be directly connected or directly connected to the other component, but in particular It is to be understood that, unless there is an opposite substrate, it may be connected or connected via another component in the middle.
  • FIG. 1 is a block diagram showing a test terminal block having a CT automatic protection control device according to an embodiment of the present invention.
  • the test terminal block 10 having the CT automatic protection control device includes a CT automatic protection control device 100, a measuring device connection terminal part 200, and a MOF connection terminal part 300.
  • the CT connection drawing circuit drawn out from the current transformer constitutes a short circuit to protect related equipment and prevent safety accidents.
  • the connecting pins are opened at the installation terminal of the distribution measuring equipment and the input terminal of the distribution measuring equipment is shorted to form a closed circuit between the distribution measuring equipment and the terminal.
  • the CT connection drawing circuit constitutes a closed circuit.
  • the connection terminal of the distribution measuring equipment is opened.
  • the CT automatic protection control device 100 automatically monitors the current of the current supply line of the measuring instrument for power distribution, such as an electricity meter, on the CT secondary side so that damage of the current transformer CT does not occur.
  • the current detection CT is used to detect the current and perform on / off control of the relay.
  • the opening of the secondary side of the current transformer mainly occurs when the wattmeter is detached. Therefore, it is possible to monitor the presence or absence of the wattmeter by using a current detection sensor of an annular or clamp type for current detection provided in the current wiring in the terminal block connected to the wattmeter.
  • a phase, B phase and C phase are power lines for transmitting electric power supplied from a power source such as a generator.
  • the highest voltages generated in the A, B and C phases each have a time difference of 120 degrees.
  • N phase is a neutral point where all of A, B and C phases are connected.
  • CT automatic protection control device 100 Detailed configuration of the CT automatic protection control device 100 will be described later in detail with reference to FIG.
  • the measuring device connection terminal unit 200 is connected to a distribution measuring device such as a power meter or a protective relay.
  • the measuring device connection terminal unit 200 is connected to the MOF connection terminal unit 300 by an internal extension.
  • the measurement instrument connection terminal unit 200 receives the voltage and current of the power line detected by the current transformer from the MOF connection terminal unit 300 through the extension.
  • the MOF connection terminal unit 300 is connected to the MOF to receive the voltage or current of the power line.
  • the MOF connection terminal unit 300 may be connected to a CT built in the MOF to receive a voltage or current reduced at an appropriate magnification by the CT.
  • the power line may be a three-wire four-wire system.
  • FIG. 2 is a view showing a configuration example of a test terminal block equipped with a CT automatic protection control device according to an embodiment of the present invention.
  • the MOF connection terminal unit 300 may be configured to adjoin P1, 1S, and 1L.
  • P2, 2S, 2L and P3, 3S, 3L may be configured adjacent to each other in the same manner. This allows the adjacent S and L terminals to be connected using terminal connecting pins if necessary.
  • the current terminals 1S, 2S, and 3S of the measuring device connection terminal part 200 are connected to the measuring device, and the current terminals are dropped and opened for maintenance and replacement work such as a simple test of the measuring device being weighed. Can be.
  • the CT automatic protection control device 100 recognizes that the current value is 0 through the current detection sensors (C1, C2, C3).
  • the relays R1, R2, and R3 for each phase 1S, 2S, and 3S are turned on to maintain the current transformer in a stable state.
  • FIG. 3 is a detailed configuration of the CT automatic protection control device according to an embodiment of the present invention.
  • the CT automatic protection control device 100 includes a sensor input unit 110, a current sensing unit 120, an A / D converter 130, a control unit 140, a power input unit 150, and a relay.
  • the output unit 160 and the interface unit 170 is included.
  • the sensor input unit 110 receives a current output from the measuring device connection terminal unit 200. To this end, the sensor input unit 110 may be connected to the current detection sensors (C1, C2, C3) mounted on the extension connecting the measuring device connection terminal 200 and the MOF connection terminal 300.
  • the current detection sensors C1, C2, C3 mounted on the extension connecting the measuring device connection terminal 200 and the MOF connection terminal 300.
  • the current detecting unit 120 receives the internal current for each phase detected through the current detecting sensors C1, C2, and C3 from the sensor input unit 110.
  • the current detection sensor may be an annular or clamp-type current detection sensor, it is possible to detect the current flowing from the MOF connection terminal unit 300 to the measuring device connection terminal unit 200 through the extension for each phase. .
  • the current detector 120 transmits the current of the extension corresponding to each detected phase to the A / D converter 130.
  • the A / D converter 130 converts the current of the extension corresponding to each phase into a digital signal.
  • the A / D converter 130 transmits the current value converted into the digital signal to the controller 140.
  • the controller 140 generates a short signal for shorting the extensions corresponding to the A phase, the B phase, and the C phase. In addition, the controller 140 generates an open signal for opening all extensions corresponding to A phase, B phase, and C phase. In addition, the controller 140 transmits the generated short signal or open signal to the relay performer 160.
  • the controller 140 compares a current value corresponding to each phase received from the A / D converter 130 with a preset reference value. As a result of the comparison, when a current value less than or equal to a preset reference value is detected, the controller 140 generates a short signal for shorting an extension corresponding to a phase in which a current value less than or equal to the reference value is detected.
  • the controller 140 may generate a first short signal for shorting the extension corresponding to the A phase.
  • the controller 140 may generate a second short signal for shorting the extension corresponding to the B phase.
  • the controller 140 may generate a third short signal for shorting the extension corresponding to the C phase.
  • the control unit 140 when the S side and the L side is reconnected and the current circuit in the measuring device again becomes a closed circuit, it detects this and generates an open signal corresponding to the corresponding phase. This is transmitted to the relay performer 160.
  • the relay performer 160 performs a short circuit or open of the extension corresponding to the A phase, B phase, and C phase according to the received short signal or the open signal. To this end, the relay performing unit 160 may relay the relays R1, R2, and R3 for each phase 1S, 2S, and 3S installed between the measuring device connection terminal unit 200 and the station connecting the MOF connection terminal unit 300. To control.
  • the relay performing unit 160 when the relay performing unit 160 receives the first short signal, the relay performing unit 160 changes the relay R1 between the 1S wire and the 1L wire to an ON state to short the 1S wire and the 1L wire. In addition, when the relay performing unit 160 receives the second short signal, the relay performing unit 160 changes the relay R2 between the 2S wiring and the 2L wiring to an ON state to short-circuit the 2S wiring and the 2L wiring. In addition, when the relay performing unit 160 receives the third short signal, the relay performing unit 160 changes the relay R3 between the 3S wiring and the 3L wiring to an ON state to short-circuit the 3S wiring and the 3L wiring.
  • the power input unit 150 receives power for operating the CT automatic protection control device 100.
  • the CT automatic protection control device 100 may further include an external button 180 in addition to the above components.
  • 4 is a CT automatic protection control device according to another embodiment of the present invention is shown.
  • the control unit 140 automatically detects the flow of the internal current and controls the relay.
  • the relay can be manually turned off by manipulating the button 180.
  • the generated relay open signal may simultaneously open all relays R1, R2, and R3 mounted on each phase, and the generated relay open signal is transmitted to the relay output unit 160.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

Cette invention se rapporte à un dispositif de commande de protection de CT automatique, qui est connecté à un instrument de mesure et à un MOF par l'intermédiaire d'une unité de terminal de connexion de l'instrument de mesure et d'une unité de terminal de connexion du MOF, en protégeant de ce fait un CT à l'intérieur du MOF. Le dispositif de commande de protection de CT automatique comprend : une unité de détection de courant qui détecte un courant qui circule dans une ligne intérieure entre l'instrument de mesure et le MOF ; un convertisseur A/D qui convertit le courant détecté de façon à générer des données de courant qui sont un signal numérique ; une unité de commande qui reçoit lesdites données de courant en provenance dudit convertisseur A/D et qui génère un signal de court-circuit ou un signal d'ouverture destiné à court-circuiter ou à ouvrir ladite ligne intérieure sur la base des données de courant reçues ; et une unité de sortie de relais qui commande un relais sur la base dudit signal de court-circuit ou dudit signal d'ouverture.
PCT/KR2011/007084 2010-09-27 2011-09-27 Dispositif de commande de protection de ct automatique destiné à faire face de manière active à une erreur humaine dans un système de distribution Ceased WO2012044031A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020100093465A KR101144278B1 (ko) 2010-09-27 2010-09-27 계기용 변성기 보호용 단자대
KR10-2010-0093465 2010-09-27

Publications (2)

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WO2012044031A2 true WO2012044031A2 (fr) 2012-04-05
WO2012044031A3 WO2012044031A3 (fr) 2012-05-24

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WO (1) WO2012044031A2 (fr)

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KR102466120B1 (ko) * 2020-11-24 2022-11-11 이레산업(주) 3상 전력의 전압-전류 측정기용 전류측정 어댑터장치
KR102799187B1 (ko) * 2022-11-18 2025-04-25 한국전력공사 전력량계의 간접 전류원 취득을 위한 ttb

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JP3680152B2 (ja) * 1995-10-31 2005-08-10 九州電力株式会社 電力線監視装置
KR200352036Y1 (ko) 2004-03-09 2004-06-04 삼성계측제어(주) 변류기 2차단자의 개방 감지회로
KR100644142B1 (ko) * 2004-08-19 2006-11-10 삼성계측제어(주) 변류기 2차단자의 개방 감지장치
KR100581699B1 (ko) * 2005-09-09 2006-05-22 주식회사 우신테크라인 단자대 교환기를 갖는 시험용 단자대
KR101036544B1 (ko) * 2008-06-27 2011-05-24 이만실 전력계통의 차단기 감시 장치
JP5465853B2 (ja) * 2008-08-21 2014-04-09 株式会社関電工 保護継電器の保護協調試験方法及びこれに使用する試験装置
JP2010166784A (ja) * 2009-01-19 2010-07-29 Chugoku Electric Power Co Inc:The 異回線異相クロス貫通変流器および回線選択継電装置
KR100955719B1 (ko) 2009-10-06 2010-05-03 삼성계측제어(주) 변류기의 과열방지 및 2차 단자 개방감지 장치

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KR20120031840A (ko) 2012-04-04
KR101144278B1 (ko) 2012-05-11
WO2012044031A3 (fr) 2012-05-24

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