PROTECTIVE RELAY SYSTEM AND PROTECTIVE RELAY DEVICE

Title:

PROTECTIVE RELAY SYSTEM AND PROTECTIVE RELAY DEVICE

Document Type and Number:

WIPO Patent Application WO/2014/112264

Kind Code:

A1

Abstract:

The purpose of the embodiment according to the present invention is to provide a protective relay system, a protective relay device, and a time synchronization method such that highly-accurate time synchronization between devices can be achieved. The embodiment according to the present invention relates to a protective relay system having a plurality of protective relay devices which protect a power grid on the basis of data pertaining to the amount of electricity in the power grid, said protective relay devices communicating with each other over a network. Each protective relay device comprises: a clock generation unit for periodically indicating the timing for sampling data pertaining to the amount of electricity in the power grid; a relay calculation unit for performing relay calculation on the basis of the sampled electricity amount data, and the electricity amount data received through the network; a random number generation unit for generating random numbers; and a synchronization frame processing unit for determining the timing for transmitting a synchronization frame to other protective relay devices over the network on the basis of the random number generated by the random number generation unit.

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Inventors:

KAWARADA AKIRA (JP)
MORI TAKAHIRO (JP)
INUKAI MICHIHIKO (JP)
SUGIURA HIDEAKI (JP)
NISHIDA TOMONORI (JP)

Application Number:

PCT/JP2013/083566

Publication Date:

July 24, 2014

Filing Date:

December 16, 2013

Export Citation:

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Assignee:

TOSHIBA KK (JP)

International Classes:

H02H3/28; H02H3/02

Foreign References:

JP2010056947A	2010-03-11
JP2010056947A	2010-03-11

Other References: