Abstract: A method of operating an energy supply system of a drilling rig, the energy supply system including a battery storage, a generator, and an electrical bus that connects to the drilling rig. The method includes: providing power to the electrical bus with the generator or a utility grid (the electrical bus is energized with a bus voltage at a bus frequency); monitoring the electrical bus for a predetermined condition; and controlling an active front end (AFE) connected to the battery storage based on whether or not the predetermined condition is satisfied, such that: a first set of parameters is used by the AFE while the predetermined condition is not satisfied; and a second set of parameters is used by the AFE while the predetermined condition is satisfied.

Abstract: A method of operating a drilling rig (that includes electrically powered equipment) and an energy supply system (that includes a battery storage, one or more generators, and an electrical bus that powers the drilling rig) includes: determining, by the energy supply system, a power demand of the drilling rig; comparing the power demand to a battery power threshold. When the power demand is less than or equal to the battery power threshold, the energy supply system enters a stealth mode by deactivating and disconnecting all generators from the electrical bus and powering the electrical bus and the drilling rig with only the battery storage. When the power demand is greater than the battery power threshold, the energy supply system powers the electrical bus with at least one of the one or more generators. The battery power threshold is based on a maximum power output rating of the battery storage.

Abstract: A method of operating a drilling rig (that includes electrically powered equipment) and an energy supply system (that includes a battery storage, one or more generators, and an electrical bus that powers the drilling rig) includes: determining, by the energy supply system, a power demand of the drilling rig; comparing the power demand to a battery power threshold. When the power demand is less than or equal to the battery power threshold, the energy supply system enters a stealth mode by deactivating and disconnecting all generators from the electrical bus and powering the electrical bus and the drilling rig with only the battery storage. When the power demand is greater than the battery power threshold, the energy supply system powers the electrical bus with at least one of the one or more generators. The battery power threshold is based on a maximum power output rating of the battery storage.