PROBLEM TO BE SOLVED: To provide a DC feeder protection relay device capable of improving sensibility with respect to failure detection of a feeding line.SOLUTION: A DC feeder protection relay device includes: a current detection section acquiring a current value of a DC feeding line for each predetermined time; a current positive component calculation section calculating current positive components; a rush ratio calculation section calculating a rush ratio on the basis of a first current positive component and a second current positive component; an upper limit correction value calculation section calculating an upper limit correction rush ratio; a lower limit correction value calculation section calculating a lower limit correction rush ratio; an attenuation correction value calculation section calculating an attenuation correction rush ratio; an amplification ratio calculation section calculating an amplification ratio; a change amount calculation section calculating a change amount of the current positive components; a determination section calculating an amplification change amount and determining whether or not the amplification change amount is equal to a determination value predetermined or more; and a trip command output section outputting a trip command for opening a circuit breaker or a switch in the case where the amplification change amount is determined to be equal to the determination value or more.

    【課題】き電線の故障検出に対する感度を改善することができる直流き電保護継電装置を提供するものである。【解決手段】実施形態の直流き電保護継電装置は、直流き電線の電流値を一定時間ごとに取得する電流検出部と、電流正成分を算出する電流正成分算出部と、第1電流正成分と第2電流正成分とに基づいて突進率を算出する突進率算出部と、上限補正突進率を算出する上限補正値算出部と、下限補正突進率を算出する下限補正値算出部と、減衰補正突進率を算出する減衰補正値算出部と、増長率を算出する増長率算出部と、電流正成分の変化量を算出する変化量算出部と、増長変化量を算出し、増長変化量が予め定められる判定値以上か否かを判定する判定部と、増長変化量が判定値以上と判定された場合に、遮断器あるいは開閉器を開放するトリップ指令を出力するトリップ指令出力部とを有する。【選択図】図1


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    Title :

    DC FEEDER PROTECTION RELAY DEVICE


    Additional title:

    直流き電保護継電装置


    Contributors:

    Publication date :

    2015-05-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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