Compressed air energy storage generator
AssigneeKobe Steel, Ltd.
InventorsTakashi Sato, Ryo Nakamichi, Masaki Matsukuma, Hiroki Saruta
Life of this patent
Estimating the term…
Abstract
A CAES generator includes a plurality of motors, a plurality of compressors, a pressure accumulator, an expander, a generator, an electric-motor inverter that changes a rotation speed of each of the motors, a feed command receiver that receives input power as a feed command value before feeding the input power, and a controller. The controller includes a compressor number calculation unit that calculates a maximum number of motors that are allowed to be driven at a rating based on the feed command value, and a compressor drive control unit that drives at the rating, the motors, the number of which is the maximum number calculated by the compressor number calculation unit.
Claims12
A compressed air energy storage generator comprising:
- a plurality of electric motors configured to be driven with input power that fluctuates;
- a plurality of compressors configured to be driven by the electric motors to compress air;
- a pressure accumulator configured to hold the compressed air discharged from the compressors;
- an expander configured to be driven with the compressed air supplied from the pressure accumulator;
- a generator configured to be driven by the expander to supply output power to a consumer facility;
- an electric-motor inverter configured to change a rotation speed of each of the electric motors;
- a feed command receiver configured to receive the input power as a feed command value before feeding the input power;
- and
- a controller including a compressor number calculation unit and a compressor drive control unit, the compressor number calculation unit being configured to calculate a maximum number of electric motors that are allowed to be driven at a rating based on the feed command value, the compressor drive control unit being configured to drive the electric motors at the rating, wherein a number of the electric motors driven at the rating is the maximum number calculated by the compressor number calculation unit.
A compressed air energy storage generator comprising:
- an electric motor configured to be driven with input power;
- a compressor configured to be driven by the electric motor to compress air;
- a pressure accumulator configured to hold the compressed air discharged from the compressor;
- a plurality of expanders configured to be driven with the compressed air supplied from the pressure accumulator;
- a plurality of generators configured to be driven by the expanders to supply, to a consumer facility, output power that fluctuates;
- a generator inverter configured to change a rotation speed of each of the generators;
- a discharge command receiver configured to receive, from the consumer facility, demand power as a discharge command value before outputting the output power;
- and
- a controller including an expander number calculation unit and an expander drive control unit, the expander number calculation unit being configured to calculate a maximum number of generators that are allowed to be driven at a rating based on the discharge command value, the expander drive control unit being configured to drive the generators at the rating, wherein a number of the generators driven at the rating is the maximum number calculated by the expander number calculation unit.
Dependencies are inferred from the claim text.