METHOD AND SYSTEM FOR OBTAINING VOLTAGE OF HIGH-VOLTAGE MAIN LINE

To provide a method and a system for obtaining a voltage of a high-voltage main line on a primary side of a transformer.SOLUTION: A method for obtaining a voltage of a high-voltage main line on a primary side of a transformer comprises the steps of: obtaining a voltage value and a current value of a...

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Hauptverfasser: NISHIDA YUSUKE, SAKAMOTO YUSUKE, SANO TSUNEYO
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a method and a system for obtaining a voltage of a high-voltage main line on a primary side of a transformer.SOLUTION: A method for obtaining a voltage of a high-voltage main line on a primary side of a transformer comprises the steps of: obtaining a voltage value and a current value of a smart meter connected to a secondary side of a transformer; obtaining a lead-in wire impedance of a lead-in wire to which the smart meter is connected; obtaining a lead-in wire voltage drop from the current value and the lead-in impedance; obtaining a low reference voltage that is a secondary side voltage of the transformer from the voltage value and the lead-in wire voltage drop; obtaining a transformer load current by obtaining and summing the current value of all the smart meters connected to the transformer; obtaining a transformer internal impedance of the transformer; obtaining a transformer internal voltage drop from a transformer load current and the transformer internal impedance; and obtaining a high voltage line voltage at a portion where the transformer is connected using a transformer winding ratio from the low reference voltage and the transformer internal voltage drop.SELECTED DRAWING: Figure 4 【課題】変圧器1次側の高圧本線の電圧を求める方法およびシステムを提供する。【解決手段】方法は、変圧器2次側に接続されたスマートメータの電圧値および電流値を取得するステップと、スマートメータが接続された引込線の引込線インピーダンスを取得するステップと、電流値および引込線インピーダンスから、引込線電圧降下を求めるステップと、電圧値および引込線電圧降下から、変圧器2次側電圧である低圧基準電圧を求めるステップと、変圧器に接続されている全スマートメータの電流値を取得および合算して、変圧器負荷電流を求めるステップと、変圧器の変圧器内部インピーダンスを取得するステップと、変圧器負荷電流および変圧器内部インピーダンスから、変圧器内部電圧降下を求めるステップと、低圧基準電圧および変圧器内部電圧降下から、変圧器の巻線比を用いて、変圧器が接続された箇所の高圧線電圧を求めるステップと、を含む。【選択図】図4