CPC H02J 3/381 (2013.01) [B63H 21/17 (2013.01); B63J 3/04 (2013.01); E21B 41/0007 (2013.01); H02J 1/06 (2013.01); H02J 3/32 (2013.01); B63J 2003/002 (2013.01); H02J 2310/42 (2020.01)] | 18 Claims |
1. A mobile offshore drilling unit having a plurality of electric thrusters to dynamically position the drilling unit, and a microgrid electric power generation system for providing power to the plurality of electric thrusters, the microgrid electric power generation system comprising:
a main electric power bus;
at least one combustion generator electrically coupled to the main electric power bus;
a power management system configured to control the main electric power bus and the at least one combustion generator;
at least one thruster electric power system for powering at least one of said plurality of electric thrusters, and comprising:
a thruster electric power bus;
at least one energy storage unit;
an additional electric power bus connected to the thruster electric power bus via an interface device;
a circuit breaker electrically coupling the additional electric power bus to a main electric power bus; and
a thruster converter electrically coupling the at least one of said plurality of electric thrusters to the thruster electric power bus;
wherein power management system configured to control the circuit breaker to isolate the thruster electric power bus from the main electric power bus in case of loss of power on the main electric power bus.
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