Phase group estimation device, phase group estimation method, and recording medium

A phase group estimation device comprising:

• a data acquirer to acquire data transmitted from a measuring device capable of measuring a voltage of a first distribution line;
• a storage to store equipment information indicating a correspondence between the measuring device and an instrument connected to the first distribution line corresponding to the measuring device and connected to a second distribution line;
• and
• a phase group estimator to classify processing sections into phase groups based on the equipment information and the data without using a result of measurement in the second distribution line, each of the processing sections being a section corresponding to the instrument, each of the phase groups being a group powered by a same phase of the second distribution line, wherein
• the data include the voltage measured by the measuring device,
• the voltage of the first distribution line is obtained by converting a voltage of the second distribution line that is a high-voltage distribution line by a pole-mounted transformer, wherein the phase group estimator classifies the processing sections into the phase groups based on temporal voltage fluctuations, and
• when a power failure is expected to happen within a certain area, the phase group estimator excludes the certain area from the classification into the phase groups for an expected period of the power failure.

A phase group estimation method comprising:

• acquiring, by a data acquirer, data transmitted from a measuring device capable of measuring a voltage of a first distribution line;
• storing, by a storage, equipment information indicating a correspondence between the measuring device and an instrument connected to the first distribution line corresponding to the measuring device and connected to a second distribution line;
• and
• classifying, by a phase group estimator, processing sections into phase groups based on the equipment information and the data, each of the processing sections being a section corresponding to the instrument, each of the phase groups being a group powered by a same phase of the second distribution line, wherein
• the data include an event notification for giving notice of an event that is a power failure or a voltage drop detected by the measuring device,
• the voltage of the first distribution line is obtained by converting a voltage of the second distribution line that is a high-voltage distribution line by a pole-mounted transformer, and
• in the classifying, the processing sections are classified into the phase groups based on information indicating a time of occurrence of the event.