Method and system for control and protection of direct current subsea power systems

摘要

A method and a high-voltage DC (HVDC) power system are provided. The system includes a plurality of sending-end (SE) modules coupled in electrical series and divided into at least two groups that each operate independently with respect to an electrical ground and a plurality of receiving-end (RE) power converter modules electrically coupled to the plurality of SE modules, the plurality of RE power converter modules including a fast ground-fault detection and control device, the plurality of RE power converter modules including a receiving-end front-end DC-DC converter controller, and an output current damping control.

主权项

1. A high-voltage DC (HVDC) power system comprising:
a plurality of sending-end (SE) modules coupled in electrical series and divided into at least two groups that each operate independently with respect to an electrical ground; a plurality of receiving-end (RE) power converter modules electrically coupled to said plurality of SE modules, the plurality of RE power converter modules comprising:
a fast ground-fault detection and control device;a receiving-end front-end DC-DC converter controller; andan output current damping control comprising a receiving-end current measuring loop; and at least two SE control systems, each SE control system of said at least two SE control systems configured to regulate each group of said at least two groups to facilitate maintaining a substantially zero amp ground current, wherein said fast ground-fault detection and control device is configured to simultaneously transmit a fault signal to at least one SE control system of said at least two SE control systems.