DC ACCIDENT DETECTION DEVICE, DC ACCIDENT DETECTION METHOD, AND PROGRAM

Japanese Patent JP2021180580

A

To provide a DC accident detection device capable of detecting a DC accident and an accident section with high reliability in a high-voltage direct current (HVDC) system.SOLUTION: A DC accident detection device includes an accident occurrence detection unit, and first, second, and third accident section determination units. The accident occurrence detection unit detects occurrence of an accident based on the comparison between a first index value indicating power changes of a plurality of DC transmission lines of interest connected to a power converter of interest and a first threshold value. When a second index value indicating the power change in any DC transmission line of interest exceeds a second threshold value, the first accident section determination unit determines a DC transmission line of interest exceeding the second threshold value as an accident section. The second accident section determination unit determines any DC transmission line of interest as an accident section based on a current change of the DC transmission line of interest. The third accident section determination unit determines whether any DC transmission line of interest is an accident section based on the logical product of determination results by both the first and second determination units.SELECTED DRAWING: Figure 1

JPWO2014132396	Power converter
WO/2019/047546	DIRECT CURRENT VOLTAGE COORDINATION CONTROL METHOD
JPS58150336	[Title of the device] Control device

KAWASAKI KEI
NAOI SHINYA
KAWACHI SHUNSUKE
IIO HISATAKA
NAKAYAMA KEIICHI

JP2020085442A

November 18, 2021

May 14, 2020

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TOSHIBA CORP
TOSHIBA ENERGY SYSTEM & SOLUTION CORP

H02J3/36; G01R31/08; H02H3/44

Shiga International Patent Office

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