US 9,178,349 B2 · Method and system for architecture, control, and protection systems of modular stacked direct current subsea power system

Abstract

A high-voltage DC (HVDC) power system and a method of controlling and protecting the HVDC power system includes a plurality of sending-end (SE) modules coupled in electrical series and a plurality of receiving-end (RE) power converter modules electrically coupled to said plurality of SE modules, the RE modules coupled in a switchyard configuration, the switchyard configuration including a plurality of load branches coupled together in electrical series, each load branch including a branch bypass switch configured to bypass load current around an associated load branch, and a branch protection system.

Claims20

Dependent claims

A high-voltage DC (HVDC) power system comprising:

one or more sending-end (SE) modules coupled in electrical series;
and
one or more receiving-end (RE) power converter modules electrically coupled to said plurality of SE modules, the RE modules coupled in a switchyard configuration, the switchyard configuration including a plurality of load branches coupled together in electrical series, each load branch including:
a branch bypass switch configured to bypass load current around a respective one of the plurality of load branches;
and
a branch protection system including a branch bypass protection device configured to detect an open circuit in the branch and to open the branch bypass switch.

3 more elements

A method of controlling and protecting a high voltage DC (HVDC) power system comprising:

coupling a plurality of load distribution branch circuits to a receiving end (RE) power distribution system configured in a switchyard structure, each of the plurality of load distribution branch circuits includes a branch protection system having a branch bypass switch configured to bypass load current around a respective one of the plurality of load distribution branches, the branch bypass protection device configured to detect an open circuit in respective of the load distribution branches, and an electrical load supplied with electrical power through an RE converter module and respective distribution cable;
during a fault in one of the plurality of load distribution branch circuits, at least one of:
bypassing current around an open circuited load using a plurality of series-connected thyristors coupled in electrical parallel with the load to open the branch bypass switch;
reducing a reverse voltage spike across the load in event of a ground fault using a diode connected anti-parallel across the load;
and
absorbing a transient current spike caused by a load-shedding event associated with another load connected to the switchyard structure using a resistor-capacitor-diode (RCD) circuit coupled across.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/024,315Filed 11 Sep 2013

Published

US 2015/0070802 A112 Mar 2015

Granted

3 Nov 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H02J 3/36
Circuit arrangements for AC mains or AC distribution networks: arrangements for transfer of electric power between AC networks via high-voltage DC…
E21B 41/00
Equipment or details not covered by groups e21b15/00 - e21b40/00
H02H 3/16
Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working…:…
H02M 11/00
Power conversion systems not covered by the preceding groups

Method and system for architecture, control, and protection systems of modular stacked direct current subsea power system

Life of this patent

Method and system for architecture, control, and protection systems of modular stacked direct current subsea power system

Life of this patent

Abstract

Claims20