Subsea Power Control
Powering installations on the seabed
The Subsea Power Control system is a very important component of the Subsea Power Grid.
It ensures several important functions in the subsea power distribution:
- Direct transfer of every command given in the topside control system to the respective subsea control module,
- Transparent communication of status and information from the respective subsea modules like variable-speed drive (VSD) and switchgear to the topside control system,
- Delivery of standardized interfaces (e.g. SIIS to other subsea application like sensors and/or pump systems).
- Delivery of a transparent communication channel from topside all the way to the subsea variable-speed drive (VSD). This enables configuration of the VSD, update of VSD software, as well as diagnostics and service being done the same way as with a topside VSD.
DesignThe Subsea Power Control system is connected with topside control via an embedded fiber in the subsea power umbilical.
The fiber is terminated and connected to a subsea electronic power control unit (EPCU) - the “brain” of the Siemens Energy Subsea Power Grid. This controller unit processes commands and information and generates the correct commands locally to the respective subsea modules like variable-speed drive (VSD) and switchgear. All data flow subsea is sent to and from the respective units via a remote termination unit (RTU) in an Ethernet data network.