| 摘要 |
A system for electric energy management inspects admittances or impedances at several positions on the same power line, and determines the presence of electricity theft based on them. Particularly, each of the admittances or impedances is calculated based on information on an amount of electricity measured by each watt-hour meter. Since information on amounts of electricity respectively measured at an upper place and several lower places on the same power line have a certain correspondence relation, the calculated admittances or impedances also have a relation. For example, the admittance or impedance at the upper place is necessarily corresponds to the equivalent value of the admittances or impedance at the lower places. Thus, it is possible to precisely determine the presence of electricity theft by monitoring whether or not the difference value is within an acceptable range in consideration of an error of measuring the amount of electricity, or the like.
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