Informetis Corporation

Nippon Telegraph and Telephone Corporation

Informetis Co., Ltd.

Yasuhiko Inoue

Masato Mizoguchi

Riichi Kudo

Shoko Shinohara

Akira Kishida

Atsushi Ohta

Kazuyoshi Saito

Junichi Iwatani

Tomoyuki Ono

A measurement system includes: a first voltage measurement unit, which measures a first voltage as a line voltage between first and second phases of a three-phase power line configured by three phases including the first, second, and a third phase; a first current measurement unit, which measures a first current as a current of the first phase; a third current measurement unit, which measures a third current as a current of the third phase; a determination unit, which determines a direction of rotation of the three phases based on the first voltage and the first current; and a computation unit which, based on at least the determination of the direction of rotation by the determination unit, computes a change in a current phase due to a load device in each of the first, third, and a second current as a current of the second phase.

Measurement device, measurement device control method, and measurement device control program

Sampling timings at a plurality of measurement points at which waveform data of a power line is sampled are easily synchronized to each other. A measurement device includes: a sampling unit configured to sample a waveform of at least one of a voltage and a current at a measurement point of a power line at a predetermined sampling timing; a processing unit configured to execute processing of the waveform sampled by the sampling unit; a time information acquisition unit configured to acquire time information from a time information provision device that is communicatively connected through a network; and an adjustment unit configured to adjust a processing timing of the processing on the basis of the time information acquired by the time information acquisition unit.

Measurement device, time information provision device, measurement device control method, time information provision control method, measurement device control program, and time information provision control program

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Tokyo, Japan

Yasuhiko Inoue