Multi-terminal DC power transmission system, common control device thereof, and fault recovery method for multi-terminal DC power transmission system

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United States of America Patent

PATENT NO 11909201
APP PUB NO 20230043622A1
SERIAL NO

17791397

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a multi-terminal DC power transmission system, a common control device is connected to a plurality of individual protective devices via a first communication network. Each of the individual protective devices is configured, when detecting change in current or voltage in a corresponding protection zone, to output a fault signal to the common control device via the first communication network and open the corresponding DC circuit breaker such that the corresponding protection zone is disconnected from the multi-terminal DC power grid and deenergized. The common control device estimates a fault occurrence zone where a fault occurs among a plurality of protection zones, based on a plurality of received fault signals. The common control device requests an individual protective device corresponding to a deenergized protection zone of the protection zones excluding the fault occurrence zone to reclose the DC circuit breaker such that the deenergized protection zone is restored.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI ELECTRIC CORPORATIONCHIYODA-KU TOKYO 100-8310

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hario, Masahiro Tokyo, JP 7 5
Ido, Yasunori Tokyo, JP 6 3
Imada, Noriyuki Tokyo, JP 16 50
Ishida, Keisuke Tokyo, JP 28 100

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