PROBLEM TO BE SOLVED: To provide a DC feeder protection relay device capable of improving sensitivity to feeder failure detection.SOLUTION: A DC feeder protection relay device of an embodiment comprises: a current detection unit which acquires a current value of a DC feeder; a current positive component calculation unit which calculates a current positive component; a pulsion ratio calculation unit which calculates a pulsion ratio on the basis of a first current positive component and a second current positive component; a detection signal output unit which outputs a detection signal when the pulsion ratio is determined to be not less than a pulsion ratio comparison value; a current change value calculation unit which calculates a current change value which is the difference between the first current positive component and a third current positive component; a difference calculation unit which calculates a current change difference which is the difference between the current change value and a current change comparison value; an integration value calculation unit which calculates a current change integration value integrated by multiplying the current change difference by a coefficient; a control signal output unit which outputs a control signal when the current change integration value is determined to be not less than a determination value; and a trip command output unit which outputs a trip command when a detection signal and a control signal are acquired.

    【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、突進率が突進率比較値以上と判定された場合に、検出信号を出力する検出信号出力部と、第1電流正成分と第3電流正成分との差である電流変化値を算出する電流変化値算出部と、電流変化値と電流変化比較値との差である電流変化差分を算出する差分算出部と、電流変化差分に、係数を乗じて積算した電流変化積算値を算出する積算値算出部と、電流変化積算値が判定値以上と判定された場合に、制御信号を出力する制御信号出力部と、検出信号を取得し、かつ制御信号を取得した場合に、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:    H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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