Title:
IMPEDANCE ESTIMATION DEVICE AND IMPEDANCE ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/162843
Kind Code:
A1
Abstract:
The present invention provides an impedance estimation device comprising: a training unit that, on the basis of plurality of items of group data in which voltage, active power, and reactive power obtained in the measurement of an interconnection point are stored as group data in a storage unit, trains 1st to nth neural network models in which each of 1 to n items of group data is set in the input layer and the impedance and the voltage of the power supply are set in the output layer; an estimation unit that feeds i items of group data (1 ≤ i ≤ n) to the input layer of the ith neural network model and estimates the voltage and the impedance of the power supply; a calculation unit that calculates i function values satisfying an electrical circuit equation; and an estimation control unit. If the root mean square error of the i function values calculated by the calculation unit satisfies a prescribed condition, the estimation control unit instructs the estimation unit to output the impedance obtained from the output layer. If the root mean square error of the i function values calculated by the calculation unit does not satisfy the prescribed condition, the estimation control unit commands the estimation unit to acquire (i + 1) items of group data, feed the (i + 1) items of group data to the input layer of the (i + 1)th neural network model, and estimate the impedance and the voltage of the power supply.
Inventors:
NAGATO SHUICHI (JP)
Application Number:
PCT/JP2021/003084
Publication Date:
August 04, 2022
Filing Date:
January 28, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01R27/02
Foreign References:
| JP6384426B2 | 2018-09-05 | |||
| JP4371062B2 | 2009-11-25 | |||
| JP2002238165A | 2002-08-23 | |||
| US20160162779A1 | 2016-06-09 | |||
| CN111199574A | 2020-05-26 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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