초록 ▼

The present invention is directed to a precise power system which utilizes two separate inverters fed by a rectifying power supply from a generator set. During normal operation, the first or critical inverter would feed the critical load(s) and the second or non-critical inverter would assist the el

The present invention is directed to a precise power system which utilizes two separate inverters fed by a rectifying power supply from a generator set. During normal operation, the first or critical inverter would feed the critical load(s) and the second or non-critical inverter would assist the electric utility in feeding the non-critical load(s). During utility grid failure, the second inverter is disconnected from the power supply so that the entire output of the generator set is available to the critical load. During generator set failure, the utility grid powers the second inverter to supply power to the first inverter for the critical load(s).

대표청구항 ▼

1. A method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load, comprising:providing a critical inverter for the critical load; providing a functionally separate non-critical inverter for the non-critical load; during normal operation, supply

1. A method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load, comprising:providing a critical inverter for the critical load; providing a functionally separate non-critical inverter for the non-critical load; during normal operation, supplying electrical power from a generator set to both said critical inverter and said non-critical inverter through a rectifying power supply, and supplying electrical power from a utility grid to said non-critical load; during utility grid failure, disconnecting the non-critical inverter from the rectifying power supply so as to provide the entire power output from the generator set to the critical inverter through the rectifying power supply; and during generator set shut down, providing utility grid power to said non-critical inverter to supply power to said critical inverter for the critical load. 2. A method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load, comprising:providing a critical inverter dedicated to the critical load; providing a non-critical, bi-directional, inverter for the non-critical load; during normal operation, supplying electrical power from a turbogenerator to both said critical inverter and said non-critical, bi-directional, inverter through a rectifying power supply, and supplying electrical power from a utility grid to said non-critical load; during utility grid failure, disconnecting said non-critical, bi-directional, inverter from the rectifying power supply so as to provide the entire power output from the turbogenerator to the critical inverter through the rectifying power supply; and during turbogenerator shutdown, providing utility grid power to said non-critical, bi-directional, inverter to supply power to said critical inverter for the critical load. 3. A method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load, comprising:providing a first inverter dedicated to the critical load; providing a second inverter for the non-critical load; during normal operation, supplying electrical power from a microturbine to both said first inverter and said second inverter through a rectifying power supply, and supplying electrical power from a utility grid to said non-critical load; during utility grid failure, disconnecting the second inverter from the rectifying power supply so as to provide the entire power output from the microturbine to the first inverter through the rectifying power supply; and during microturbine shut down, providing utility grid power to said second inverter to supply power to said first inverter for the critical load. 4. The method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load of claim 3, and in addition:providing means to start the microturbine with power from the utility grid rectified to direct current in the second inverter and inverted back to variable frequency, variable voltage, current in the power supply. 5. The method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load of claim 3, and in addition:providing a switching bypass between the critical load and the non-critical load to isolate the critical load and the non-critical load with the utility grid during system maintenance or system failure. 6. A method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load, comprising:providing a plurality of critical inverters each dedicated to the critical load; providing a like plurality of non-critical, bi-directional, inverters for the non-critical load; during normal operation, supplying electrical power from a like plurality of turbogenerators to both said plurality of critical inverters and said plurality of non-critical, bi-directional, inverters through a like plurality of rectifying power supplies, and supplying electrical power from a utility grid to said non-critical load; during utility grid failure, disconnecting at least one of said plurality of non-critical, bi-directional, inverters from the corresponding rectifying power supply of said plurality of rectifying power supplies so as to provide the entire power output from the corresponding turbogenerator of said plurality of turbogenerators to the corresponding critical inverter of said plurality of critical inverters through the corresponding rectifying power supply of said plurality of rectifying power supplies; and during shutdown of any of said plurality of turbogenerators, providing utility grid power to said corresponding non-critical, bi-directional, inverter of said plurality of non-critical, bi-directional, inverters to supply power to said corresponding critical inverter of said plurality of critical inverters for the critical load. 7. The method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load of claim 6, and in addition:providing means to start each of said plurality of turbogenerators with power from the utility grid rectified to direct current in the corresponding non-critical, bi-directional inverter of said plurality of non-critical, bi-directional inverters and inverted back to variable frequency, variable voltage, current in the corresponding rectifying power supply of said plurality of rectifying power supplies. 8. The method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load of claim 6, and in addition:providing a switching bypass between the critical load and the non-critical load to isolate the critical load and the non-critical load with the utility grid during system maintenance or system failure. 9. The method of supplying uninterruptible electrical power to a critical load and electrical power to a non-critical load of claim 6, and in addition:providing a like plurality of switching bypasses between the critical load and the non-critical load to act simultaneously to isolate the critical load and the non-critical load with the utility grid during system maintenance or system failure. 10. A precise power system, comprising:a critical load; a non-critical load; a critical inverter providing electrical power to said critical load during normal operation; a non-critical, bi-directional, inverter providing electrical power to said non-critical load during normal operation; a generator set; a rectifying power supply receiving electrical power from said generator set and supplying rectified electrical power to both said critical inverter and said non-critical, bi-directional, inverter during normal operation; a utility grid for supplying electrical power to said non-critical load during normal operation; means for said rectifying power supply to provide electrical power from said generator set only to said critical inverter during utility grid shutdown; and means for said non-critical, bi-directional, inverter to supply electrical power from said utility grid to said critical inverter during said generator set shutdown. 11. The precise power system of claim 10, and in addition,means to start said generator set with power from said utility grid rectified to direct current in said non-critical, bi-directional, inverter and inverted back to variable frequency, variable voltage, current in said rectifying power supply. 12. The precise power system of claim 10 wherein said generator set is a turbogenerator.13. The precise power system of claim 12 wherein said turbogenerator is a microturbine.14. The precise power system of claim 10, and in addition, a switching bypass disposed between said critical load and said non-critical load to isolate said critical load and said non-critical load with said utility grid during system maintenance or system failure.15. A precise power system, comprising:a critical load; a non-critical load; a plurality of critical inverters providing electrical power to said critical load during normal operation; a like plurality of non-critical, bi-directional, inverters providing electrical power to said non-critical load during normal operation; a like plurality of generator sets; a like plurality of rectifying power supplies each receiving electrical power from said corresponding generator set of said like plurality of generator sets and supplying rectified electrical power to both said corresponding critical inverter of said plurality of critical inverters and said corresponding non-critical, bi-directional, inverter of said plurality of non-critical, bi-directional, inverters during normal operation; a utility grid for supplying electrical power to said non-critical load during normal operation; means for each of said rectifying power supplies of said plurality of rectifying power supplies to provide electrical power from said corresponding generator set of said plurality of generator sets only to said corresponding critical inverter of said plurality of critical inverters during utility grid shutdown; and means for each of said non-critical, bi-directional, inverters of said plurality of non-critical, bi-directional, inverters to supply electrical power from said utility grid to said corresponding critical inverter of said plurality of critical inverters during said corresponding generator set shutdown. 16. The precise power system of claim 15 wherein said like plurality of generator sets is a like plurality of turbogenerators.17. The precise power system of claim 16 wherein said like plurality of turbogenerators is a like plurality of microturbines.18. The precise power system of claim 15, and in addition, at least one switching bypass disposed between said critical load and said non-critical load to isolate said critical load and said non-critical load with said utility grid during system maintenance or system failure.19. The precise power system of claim 18 wherein said at least one switching bypass is a like plurality of switching bypasses acting simultaneously.