WO2021234788A1 - 給電システム、保護協調方法、及びプログラム - Google Patents

給電システム、保護協調方法、及びプログラム Download PDF

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Publication number
WO2021234788A1
WO2021234788A1 PCT/JP2020/019676 JP2020019676W WO2021234788A1 WO 2021234788 A1 WO2021234788 A1 WO 2021234788A1 JP 2020019676 W JP2020019676 W JP 2020019676W WO 2021234788 A1 WO2021234788 A1 WO 2021234788A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
unit
current
ground fault
gate block
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/JP2020/019676
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
直樹 花岡
英俊 高田
将樹 香西
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.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to PCT/JP2020/019676 priority Critical patent/WO2021234788A1/ja
Priority to US17/920,098 priority patent/US12113350B2/en
Priority to JP2022523769A priority patent/JP7414132B2/ja
Publication of WO2021234788A1 publication Critical patent/WO2021234788A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02H3/08—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 excess current
    • H02H3/087—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 excess current for DC applications
    • 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
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
    • 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
    • H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for DC mains or DC distribution networks

Definitions

  • the accident location can be quickly disconnected in the event of an accident, and other soundness can be achieved. Protection coordination is taken to protect the circuit.
  • MCCB molded case circuit breaker
  • the wiring length of the power supply line from the power supply (rectifier or the like) to the load (ICT device or the like) may be long, for example, several hundred meters. Further, when power is supplied to an outdoor device or the like, the wiring length may be further lengthened, such as several km.
  • the power supply device 100 and the loads 600-1 to 600-4 are connected by a feeding line, and protective devices 300-1 to 300-4 are provided in the middle of the feeding line.
  • the feeding line is shown by one cable, but more specifically, the feeding line (cable) is composed of a feeding line on the positive side and a feeding line on the negative side.
  • the protective device 300 (earth-leakage circuit breaker or the like) suitable for ground fault detection, if a ground fault occurs near the protective device 300 at the branch portion, the protective device 300 can be operated by the ground fault current. ..
  • the ground fault current becomes small due to the large wiring resistance as in the case of a short circuit, and the protection device 300 cannot be operated due to the ground fault current.
  • the monitoring unit 720 measures the current (or voltage) generated by the imbalance of the reciprocating current in the ZCT800, and determines that a ground fault has occurred when it detects that the value of the current exceeds the threshold value. , A signal indicating that a ground fault has occurred may be output.
  • control unit 140 of the control device 170 makes any of the following determinations (1) to (3).
  • Judgment (2) The control unit 140 of the control device 170 detected that a ground fault was detected by the ZCT 800 at one of the branch portions, but the monitoring unit 120 (monitoring of the ground fault detector of the ground fault overvoltage detection type). ) Does not detect that a ground fault has been detected, it is determined that the ground fault detection by the ZCT800 is a false detection (noise) or a malfunction, and it is determined that neither the gate block portion 110 nor the protective device 300 is operated. ..
  • the above program can be recorded on a computer-readable recording medium (portable memory, etc.), saved, and distributed. It is also possible to provide the above program through a network such as the Internet or e-mail.
  • the power supply according to item 3 wherein after the gate block unit operates, the control unit operates at least one of the protection device of the branch portion closest to the accident point and the transmission of a signal. system.
  • the power supply system includes a plurality of branches branched from a distribution board connected to the power supply, and each branch is provided with a protective device. After the gate block unit operates, the control unit operates the protection devices of each branch section one by one, and applies a voltage to the feeder line before operating one protection device so that no current flows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Direct Current Feeding And Distribution (AREA)
PCT/JP2020/019676 2020-05-18 2020-05-18 給電システム、保護協調方法、及びプログラム Ceased WO2021234788A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2020/019676 WO2021234788A1 (ja) 2020-05-18 2020-05-18 給電システム、保護協調方法、及びプログラム
US17/920,098 US12113350B2 (en) 2020-05-18 2020-05-18 Power supply system, protection coordination method and program
JP2022523769A JP7414132B2 (ja) 2020-05-18 2020-05-18 給電システム、保護協調方法、及びプログラム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/019676 WO2021234788A1 (ja) 2020-05-18 2020-05-18 給電システム、保護協調方法、及びプログラム

Publications (1)

Publication Number Publication Date
WO2021234788A1 true WO2021234788A1 (ja) 2021-11-25

Family

ID=78708231

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/019676 Ceased WO2021234788A1 (ja) 2020-05-18 2020-05-18 給電システム、保護協調方法、及びプログラム

Country Status (3)

Country Link
US (1) US12113350B2 (https=)
JP (1) JP7414132B2 (https=)
WO (1) WO2021234788A1 (https=)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021234789A1 (ja) * 2020-05-18 2021-11-25 日本電信電話株式会社 給電システム、地絡検知方法、及びプログラム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57183216A (en) * 1981-04-27 1982-11-11 Westinghouse Electric Corp Load protecting device
WO2009081912A1 (ja) * 2007-12-25 2009-07-02 Panasonic Electric Works Co., Ltd. Ｄｃ配電システム
WO2009081908A1 (ja) * 2007-12-25 2009-07-02 Panasonic Electric Works Co., Ltd. 直流配電システム
WO2017221493A1 (ja) * 2016-06-21 2017-12-28 三菱電機株式会社 直流電気回路保護装置およびアーク検出方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9800044B2 (en) * 2015-05-29 2017-10-24 Abb Schweiz Ag Fault location of DC distribution systems
FR3056033B1 (fr) * 2016-09-14 2018-10-12 Supergrid Institute Protection d'un reseau hvdc
US20200144807A1 (en) * 2018-11-07 2020-05-07 Rolls-Royce North American Technologies Inc. Redundant protection system for a hybrid electrical system
DE112020004142T5 (de) * 2019-09-02 2022-05-12 Mitsubishi Electric Corporation Dc-leistungsverteilsystem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57183216A (en) * 1981-04-27 1982-11-11 Westinghouse Electric Corp Load protecting device
WO2009081912A1 (ja) * 2007-12-25 2009-07-02 Panasonic Electric Works Co., Ltd. Ｄｃ配電システム
WO2009081908A1 (ja) * 2007-12-25 2009-07-02 Panasonic Electric Works Co., Ltd. 直流配電システム
WO2017221493A1 (ja) * 2016-06-21 2017-12-28 三菱電機株式会社 直流電気回路保護装置およびアーク検出方法

Also Published As

Publication number Publication date
JP7414132B2 (ja) 2024-01-16
JPWO2021234788A1 (https=) 2021-11-25
US20230178975A1 (en) 2023-06-08
US12113350B2 (en) 2024-10-08

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