Abstract: A system and method to control the electrical power input to direct electrically heated subsea pipelines. The system comprises a plurality of variable voltage generators and a plurality of step-up transformers. Each step-up transformer is electrically connected to the output of an associated generator. The system further comprises a plurality of variable step-down transformers. Each step-down transformer is electrically connected the output of the step-up transformers and to an associated pipeline segment.

Abstract: A subsea electrical subsystem and a power distribution utilizing the same. The electrical substation located subsea is electrically connected to AC power provided by a power generator located topside. The electrical substation comprises a plurality of circuit breakers and a circuit breaker operating system associated with each circuit breaker. The circuit breaker operating system is constructed and arranged to operate the associated circuit breaker and is operatively connected to at least one control module. The control modules are electrically connected to a DC power supply located topside.