Kabushiki Kaisha Toshiba

Tohoku University

Tomoyuki Kawasaki

Katsuhiko Sekiguchi

Shogo Miura

Takaaki Ohnari

Masayuki Kawamata

A protection relay device includes: an analog-to-digital converter that samples an analog signal inputted from an analog input unit and converts the analog signal into digital data; a variable filter that filters and outputs the digital data, the variable filter having a filter coefficient that is varied by external control; and an adaptive controller that variably controls the filter coefficient of the variable filter so that a difference between the digital data filtered by the variable filter and a target signal decreases.

Protection relay device and protection relay method

In one embodiment, a protection control monitoring device includes a conversion unit sequentially converting analog data corresponding to an amount of electricity of a power system into digital data and outputting the results as a data sequence, a calculation unit sequentially calculating difference data representing a difference between adjacent data in the data sequence and outputting results as a difference data sequence, a data block generation unit dividing each of a plurality of difference data in the difference data sequence into a plurality of partial data, generating data blocks from a plurality of corresponding partial data, and outputting results as a data block sequence, a compression unit losslessly compressing the data block sequence, and a storage unit storing the losslessly compressed data block sequence.

Growing community of inventors

Fuchu, Japan

Tomoyuki Kawasaki