REMOTE LOAD BYPASS SYSTEM
First Claim
1. A remote load bypass system comprising:
- a plurality of remote subsea inverter modules connected in series and receiving DC current in response to a DC transmission line current;
a plurality of load bypass switches, wherein each bypass switch is connected in parallel with a remote module selected from the plurality of remote modules such that each module is associated with a distinct and respective bypass switch, and further wherein each bypass switch provides a bypass path to a corresponding remote module DC current during a fault or intentional bypass associated with the respective remote module, and further wherein each bypass switch comprises;
a coupled DC-choke or at least one discrete subsea inverter DC-choke; and
an over-voltage detection/protection circuit integrated within the coupled DC-choke or at least one discrete subsea inverter DC-choke.
2 Assignments
0 Petitions
Accused Products
Abstract
A load bypass switch enables continuous power to remote loads in the event of 1) failure of one or more remote loads, or 2) faults within the remote loads, within a dc power system. The bypass switch utilizes the passive components of the dc loads or inverters and therefore reduces overall component count. A black start method for the remote dc system uses the same passives present inside the loads/inverters and simultaneously uses some of the features of the bypass switch. A bypass-module-yard uses multiple bypass switches enabling continuous power to the remote loads in the event of failure of one or more power distribution cables (in-feed to the remote loads) located remotely in the dc system.
11 Citations
25 Claims
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1. A remote load bypass system comprising:
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a plurality of remote subsea inverter modules connected in series and receiving DC current in response to a DC transmission line current; a plurality of load bypass switches, wherein each bypass switch is connected in parallel with a remote module selected from the plurality of remote modules such that each module is associated with a distinct and respective bypass switch, and further wherein each bypass switch provides a bypass path to a corresponding remote module DC current during a fault or intentional bypass associated with the respective remote module, and further wherein each bypass switch comprises; a coupled DC-choke or at least one discrete subsea inverter DC-choke; and an over-voltage detection/protection circuit integrated within the coupled DC-choke or at least one discrete subsea inverter DC-choke. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A remote load bypass switch comprising:
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at least one of a DC-choke coupling a DC source current to one or more remote subsea inverter modules or at least one remote subsea inverter module discrete DC-choke coupling the DC current source to one or more remote subsea inverter modules; and a thyristor or over-voltage detection/protection circuit integrated within and connected to the coupled DC-choke or at least one inverter discrete DC-choke, wherein the coupled DC-choke or at least one inverter discrete DC-choke and thyristor or over-voltage detection/protection circuit together are configured to provide a bypass current path to a remote module subsequent to a remote module fault or in response to an intentional bypass command. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification