CURRENT DIFFERENTIAL RELAY AND SAMPLING SYNCHRONIZATION METHOD

WIPO Patent Application WO/2019/043821

A1

Provided is a current differential relay (53A), wherein a voltage calculation unit (74) calculates, as a first specific point voltage, voltage at a specific point on the line connecting the first and second terminals of a transmission line on the basis of current data (I1) and voltage data (V1) at the first terminal and calculates, as a second specific point voltage, voltage at the specific point on the basis of current data (Is1) and voltage data (Vs1) at the second terminal. The voltage calculation unit (74) calculates the first specific point voltage and the second specific point voltage in such a way that a first line connecting the first terminal and the specific point and a second line connecting the second terminal and the specific point are each simulated as an L-type circuit, a single T-type circuit, or a plurality of T-type circuits connected in series, said L-type circuit being a part of the π-type circuit obtained when the entire transmission line is modeled as a single π-type circuit. A phase difference calculation unit (75) calculates the phase difference between the first specific point voltage and the second specific point voltage. A synchronization processing unit (73) adjusts sampling time on the basis of the time corresponding to the phase difference.

ODA SHIGETOO (JP)

PCT/JP2017/031106

March 07, 2019

August 30, 2017

Click for automatic bibliography generation  

MITSUBISHI ELECTRIC CORP (JP)

H02H3/28

JP2015142416A	2015-08-03
JP2011200100A	2011-10-06
JP2008125251A	2008-05-29

FUKAMI PATENT OFFICE, P.C. (JP)

View/Download PDF      PDF Help

Previous Patent: A TIRE HAVING A TREAD COMPRISING A RUBBER COMPOSITION

Next Patent: MEMORY ACCESS DEVICE, IMAGE PROCESSING DEVICE, AND IMAGING DEVICE