Abstract: A control system for a subsea gas compression system. The control system includes a subsea control system comprising a plurality of process sensors measuring process parameters of the compression system, a compressor controller configured to generate control commands controlling the motor and the valve based on measurements of the process parameters from the sensors, and an electric device including hardware and software. The electric device is arranged to receive measurements from the process sensors and the compressor controller is integrated in the electric device. The electric device is any of an actuator for controlling the valve position, a variable speed drive for controlling the motor driving the compressor by adjusting the frequency of the power supplied to the motor, a switchgear connected to the variable speed drive for turning on and off the variable speed drive, or an uninterruptible power supply for providing emergency power to the control system.

Abstract: A control system and a method arranged for redundant supply of power to active magnetic bearings adapted for support of a shaft or rotor in a rotating machine. The control system comprises at least two control modules which are supplied external power. The control modules are connectable to a base module comprising a first set of power and sensor signal pathways which can be switched in to provide contact between a first control module and the active magnetic bearings, and a second set of power and sensor signal pathways which can be switched in to provide contact between a second control module and the active magnetic bearings. Each control module comprises a switching mechanism which is controllable for connecting the control modules one at a time to the active magnetic bearings via the first set or via the second set of power and sensor signal pathways.

Abstract: A method for supplying barrier fluid in a subsea motor and pump assembly is disclosed, wherein desalinated water is extracted from or downstream of a reverse osmosis device and supplied to the motor and pump assembly, alone or as mixture with ethylene glycol. A corresponding system is likewise disclosed.