ARRIVAL VOLTAGE ESTIMATION DEVICE AND ESTIMATION PROGRAM

• Main Authors: SURESH CHAND VERMA, ISHII ATSUYUKI, KATSURAGI KEISUKE, HIROMASA KATSUTOSHI, ASANO MITSUTOSHI, TANOMURA KENICHI, HIRATO YASUTA, SHIMADA IKUHIKO, TAKASAKI KOTARO
• Format: Patent
• Language: English; Japanese
• Published: 23.03.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To estimate arrival voltage at a user without a measurement device.SOLUTION: An arrival voltage estimation device is configured to: take in first voltage, current, and power-factor from a first measurement device on the upstream side of a plurality of users; take in second voltage, current, and power-factor from a second measurement device provided on the downstream side; calculate a first tidal current on the basis of the first voltage, current, and power-factor, a second tidal current on the basis of the second voltage, current, and power-factor, and a total load power between the first and second measurement devices on the basis of the first and second tidal currents; perform initial setting of set load power for each of the plurality of users by virtually distributing the total load power as the set load power; calculate an estimated third tidal current at the first measurement device and an estimated arrival voltage at each of the plurality of users by using information on a line between the first and second measurement devices, the set load power, the first voltage, and the second tidal current; determine whether or not difference between the first tidal current and the third tidal current is within a threshold; and perform updating and setting the set load power when the difference is not within the threshold. 【課題】計測器のない需要家への到達電圧を推定すること。【解決手段】複数の需要家の上流側の第１の計測器から、第１の電圧、電流、力率を取り込み、下流側に設けられた第２の計測器から、第２の電圧、電流、力率を取り込み、第１の電圧、電流、力率に基づいて第１の潮流を、第２の電圧、電流、力率に基づいて第２の潮流を、さらに第１、第２の潮流に基づいて第１、第２の計測器の間の総負荷電力を、それぞれ算出し、総負荷電力を仮想的に配分して、複数の需要家のそれぞれごとの設定負荷電力として初期設定し、第１、第２の計測器の間の線路情報、設定負荷電力、第１の電圧、および第２の潮流を用い、第１の計測器での推定の第３の潮流と複数の需要家それぞれにおける推定到達電圧とを算出し、第１の潮流と第３の潮流との差分が閾値内に収まっているか否かを判断し、収まっていない場合に設定負荷電力を更新設定する。【選択図】図１