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US 2016/0109179 A1Published application
Isolated Power Networks Within An All-Electric LNG Plant And Methods For Operating Same
AssigneeKellogg Brown & Root LLC
InventorKeith McCarthy
Life of this patent
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Abstract
Embodiments generally relate to a motor driven compressor (MDC) power network electrically isolated and independent from a balance of plant (BOP) power network within an electrical power system and methods for operating the same. In one embodiment, the MDC power network can include one or more MDC trains, and each of the MDC trains can include an MDC distribution bus, one or more MDC turbine generators, one or more electric motors, and one or more compressors. The BOP power network can include a BOP distribution bus, one or more BOP turbine generators, and one or more plant circuits comprising the balance of the plant.
Claims20
An electrical power system, comprising:
- a motor driven compressor power network powering a single motor driven compressor train and configured to generate and distribute motor driven compressor electrical power, wherein each motor driven compressor train comprises:
- a motor driven compressor turbine generator configured to generate the motor driven compressor electrical power;
- a motor driven compressor distribution bus electrically connected to the motor driven compressor turbine generator and configured to distribute the motor driven compressor electrical power;
- the electric motor electrically connected to the motor driven compressor distribution bus;
- and
- the motor driven compressor coupled to the electric motor and configured to be driven by the electric motor;
- and
- a balance of plant power network configured to generate and distribute balance of plant electrical power, wherein the balance of plant power network comprises:
- a balance of plant turbine generator configured to generate the balance of plant electrical power;
- a balance of plant distribution bus electrically connected to the balance of plant turbine generator and configured to distribute the balance of plant electrical power;
- and
- one or more plant circuits electrically connected to the balance of plant distribution bus and configured to be powered by the balance of plant electrical power,
- wherein the motor driven compressor power network and the balance of plant power network are electrically isolated from each other.
10 more elements
An electrical power system, comprising:
- a motor driven compressor power network comprising;
- a motor driven compressor control system;
- one or more motor driven compressor trains;
- such motor driven compressor power network configured to generate and distribute motor driven compressor electrical power,
- wherein each motor driven compressor train comprises:
- a motor driven compressor turbine generator configured to generate the motor driven compressor electrical power;
- a motor driven compressor distribution bus electrically connected to the motor driven compressor turbine generator and configured to distribute the motor driven compressor electrical power;
- an electric motor electrically connected to the motor driven compressor distribution bus;
- and
- a compressor coupled to the electric motor and configured to be driven by the electric motor;
- and
- a balance of plant (balance of plant) power system configured to generate and distribute a balance of plant electrical power, wherein the balance of plant power network comprises:
- a balance of plant turbine generator configured to generate the balance of plant electrical power;
- a balance of plant distribution bus electrically connected to the balance of plant turbine generator and configured to distribute the balance of plant electrical power;
- and
- one or more plant circuits electrically connected to the balance of plant distribution bus and configured to be powered by the balance of plant electrical power,
- wherein the motor driven compressor power network and the balance of plant power network are electrically isolated from each other, have different electrical frequencies, and together have a total operating load capacity of less than 2,400 MW, and
- wherein the motor driven compressor control system is operatively connected to and configured to monitor and control process operation parameters of the motor driven compressor power network,
- the motor driven compressor control system is operatively connected to and configured to tune the motor driven compressor turbine generator with a dry low NOx (DLN) controller, and
- the DLN controller is configured to minimize the effects of combustion dynamics and maintain a total NOx emissions of less than 1,500 pounds per hour.
17 more elements
A method for generating electricity, comprising:
- generating motor driven compressor electrical power and balance of plant electrical power in an electrical power system, wherein the motor driven compressor electrical power and the balance of plant electrical power have different electrical frequencies, and the electrical power system comprises:
- a motor driven compressor power network comprising one or more motor driven compressor trains and configured to generate and distribute the motor driven compressor electrical power;
- a balance of plant power network configured to generate and distribute the balance of plant electrical power,
- compressing or moving a process fluid by a compressor, wherein the compressor is driven by an electric motor powered by the motor driven compressor electrical power;
- powering at least one auxiliary device by the balance of plant electrical power, and
- tuning one or more motor driven compressor turbine generators with a dry low NOx (DLN) controller to maintain a NOx emissions operating load ratio of less than 6.53 pounds per hour per MW, wherein the motor driven compressor turbine generators are powered by the motor driven compressor electrical power, wherein the NOx emissions operating load ratio is equal to a total sum of NOx emissions from the motor driven compressor and balance of plant power networks per a total sum of operating load capacities from the motor driven compressor and balance of plant power networks.
3 more elements
Dependencies are inferred from the claim text.