DEVICE FOR ESTIMATING STATE OF POWER GRID, STATE ESTIMATION METHOD THEREOF, AND POWER GRID CONTROL SYSTEM

摘要

This device for estimating the state of a power grid by estimating state quantities of the power grid is provided with: a power grid measurement unit (110) that receives occurrence distribution information of the amount of power input/output to/from a power-consuming device or a power source interconnected with the power grid; a simulator unit (120) that calculates a state estimate for the power grid on the basis of the received occurrence distribution information of the amount of power; a maximum likelihood state value calculation unit (130) that calculates the state value that is the most likely in terms of probability using simulation data output from the simulation unit and the measurement data of the power grid output from the power grid measurement unit; and a parameter correction unit (140) that corrects the parameters of the simulator unit on the basis of the output of the maximum likelihood state value calculation unit. The parameters of the simulator unit are successively corrected in a manner so as to reduce the difference between the simulator data of the simulator unit and the power grid measurement data of the power grid measurement unit.