| 摘要 |
PROBLEM TO BE SOLVED: To provide a state estimation device capable of enabling a user to simultaneously estimate a load amount of the user's apparatus and power loss generated in a distribution line, by using a small number of measurement points.SOLUTION: A state estimation device comprises a harmonic component calculation unit, a database, and a state estimation unit. The harmonic component calculation unit acquires measurement information on power and current supplied to an electric system with which a plurality of apparatuses of a user can be connected, and calculates a first harmonic component which is a harmonic component of the power and a second harmonic component which is a harmonic component of the current. The database can store a relative harmonic content of power required by each of the plurality of apparatuses of the user. The state estimation unit estimates effective power of the apparatus of the user and a resistance value in the electric system by expressing the first harmonic component by first power calculated from the effective power and the relative harmonic content of the apparatus of the user and second power calculated from a resistance value in the electric system and the second harmonic component. |
