Method and apparatus for controlling a microturbine

• US 6,924,563 B2
• Filed: 05/31/2002
• Issued: 08/02/2005
• Est. Priority Date: 05/31/2002
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Cardinal, Mark Edward, Garces, Luis Jose, Sinha, Gautam, Dame, Mark Edward
• Primary Examiner(s): Waks, Joseph
• Application Number:
  US10/160,788
• Publication Number:
  US 20030222458A1
• Time in Patent Office: 1,159 Days
• Field of Search: 290/40.A, 290/32, 322/10, 322/12, 363/34
• US Class Current: 290/40.00A
• CPC Class Codes: F02C 7/268 Starting drives for the rotor , acting directly on the rotor of the gas turbine to be started

Abstract

An apparatus for controlling a microturbine, the apparatus including: a rectifier adapted for converting at least one generated voltage from the microturbine to a DC link voltage; an inverter adapted for converting the DC link voltage to at least one inverter output voltage, the at least one inverter output voltage being electrically coupled to an external power bus; a starter drive adapted for converting at least one starter input voltage to at least one starter output voltage, the at least one starter input voltage being electrically coupled to the external power bus, the at least one starter output voltage being electrically coupled to the microturbine.

Claims

1. An apparatus for controlling a microturbine, said apparatus comprising:

a microturbine rectifier adapted for converting at least one generated voltage from said microturbine to a DC link voltage;

a microturbine inverter adapted for converting said DC link voltage to at least one inverter output voltage, said at least one inverter output voltage being electrically coupled to an external power bus;

a starter drive adapted for converting at least one starter input voltage to at least one starter output voltage, said at least one starter input voltage being electrically coupled to said external power bus, said at least one starter output voltage being electrically coupled to said microturbine, said starter drive comprising a starter rectifier adapted for converting said at least one starter input voltage to a starter link voltage and a starter inverter adapted for converting said starter link voltage to said at least one starter output voltage, said starter inverter not comprising said microturbine inverter.

2. The apparatus of claim 1 further comprising a contactor adapted for controllably electrically coupling said microturbine to provide said at least one generated voltage from said microturbine.

3. The apparatus of claim 1 further comprising a starter contactor adapted for controllably electrically coupling said at least one starter output voltage to said microturbine.

4. The apparatus of claim 1 wherein said microturbine inverter further comprises:

a converter stage adapted for converting said DC link voltage to at least one unfiltered output voltage; and

a filter stage adapted for filtering said at least one unfiltered output voltage to produce said at least one inverter output voltage.

5. The apparatus of claim 1 further comprising a fault contactor adapted for controllably electrically coupling said external power bus to said at least one inverter output voltage and said at least one starter input voltage.

6. The apparatus of claim 1 wherein said microturbine rectifier further comprises:

a rectification stage adapted for converting said at least one generated voltage to an intermediate DC voltage; and

a buck/boost stage adapted for converting said intermediate DC voltage to said DC link voltage.

7. An apparatus for controlling a microturbine, said apparatus comprising:

a microturbine rectifier adapted for converting at least one generated voltage from said microturbine to a DC link voltage;

a microturbine inverter adapted for converting said DC link voltage to at least one inverter output voltage, said at least one inverter output voltage being electrically coupled to an external power bus;

a starter drive adapted for converting at least one starter input voltage to at least one starter output voltage, said at least one starter input voltage being electrically coupled to said external power bus, said at least one starter output voltage being electrically coupled to said microturbine, said starter drive comprising a starter rectifier adapted for converting said at least one starter input voltage to a starter link voltage and a starter inverter adapted for converting said starter link voltage to said at least one starter output voltage, said starter inverter not comprising said microturbine inverter;

a contactor adapted for controllably electrically coupling said microturbine to provide said at least one generated voltage from said microturbine; and

a starter contactor adapted for controllably electrically coupling said at least one starter output voltage to said microturbine.

8. The apparatus of claim 7 wherein said microturbine inverter further comprises:

a converter stage adapted for converting said DC link voltage to at least one unfiltered output voltage; and

a filter stage adapted for filtering said at least one unfiltered output voltage to produce said at least one inverter output voltage.

9. The apparatus of claim 7 further comprising a fault contactor adapted for controllably electrically coupling said external power bus to said at least one inverter output voltage and said at least one starter input voltage.

10. The apparatus of claim 7 wherein said microturbine rectifier further comprises:

a rectification stage adapted for converting said at least one generated voltage to an intermediate DC voltage; and

a buck/boost stage adapted for converting said intermediate DC voltage to said DC link voltage.

11. A system comprising:

a microturbine;

a microturbine rectifier adapted for converting at least one generated voltage from said microturbine to a DC link voltage;

a microturbine inverter adapted for converting said DC link voltage to at least one inverter output voltage, said at least one inverter output voltage being electrically coupled to an external power bus;

a starter drive adapted for converting at least one starter input voltage to at least one starter output voltage, said at least one starter input voltage being electrically coupled to said external power bus, said at least one starter output voltage being electrically coupled to said microturbine, said starter drive comprising a starter rectifier adapted for converting said at least one starter input voltage to a starter link voltage and a starter inverter adapted for converting said starter link voltage to said at least one starter output voltage, said starter inverter not comprising said microturbine inverter.

12. The system of claim 11 further comprising a contactor adapted for controllably electrically coupling said microturbine to provide said at least one generated voltage from said microturbine.

13. The system of claim 11 further comprising a starter contactor adapted for controllably electrically coupling said at least one starter output voltage to said microturbine.

14. The system of claim 11 wherein said microturbine inverter further comprises:

a converter stage adapted for converting said DC link voltage to at least one unfiltered output voltage; and

a filter stage adapted for filtering said at least one unfiltered output voltage to produce said at least one inverted output voltage.

15. The system of claim 11 further comprising a fault contactor adapted for controllably electrically coupling said external power bus to said at least one inverter output voltage and said at least one starter input voltage.

16. The system of claim 11 wherein said microturbine rectifier further comprises:

a rectification stage adapted for converting said at least one generated voltage to an intermediate DC voltage; and

a buck/boost stage adapted for converting said intermediate DC voltage to said DC link voltage.

17. A system comprising:

a microturbine;

a microturbine rectifier adapted for converting at least one generated voltage from said microturbine to a DC link voltage;

a microturbine inverter adapted for converting said DC link voltage to at least one inverter output voltage, said at least one inverter output voltage being electrically coupled to an external power bus;

a starter drive adapted for converting at least one starter input voltage to at least one starter output voltage, said at least one starter input voltage being electrically coupled to said external power bus, said at least one starter output voltage being electrically coupled to said microturbine, said starter drive comprising a starter rectifier adapted for converting said at least one starter in voltage to a starter link voltage and a starter inverter adapted for converting said starter link voltage to said at least one starter output voltage, said starter inverter not comprising said microturbine inverter;

a contactor adapted for controllably electrically coupling said microturbine to provide said at least one generated voltage from said microturbine; and

a starter contactor adapted for controllably electrically coupling said at least one starter output voltage to said microturbine.

18. The system of claim 17 wherein said microturbine inverter further comprises:

a converter stage adapted for converting said DC link voltage to at least one unfiltered output voltage; and

a filter stage adapted for filtering said at least one unfiltered output voltage to produce said at least one inverter output voltage.

19. The system of claim 17 further comprising a fault contactor adapted for controllably electrically coupling said external power bus to said at least one inverter output voltage and said at least one starter input voltage.

20. The system of claim 17 wherein said microturbine rectifier further comprises:

a rectification stage adapted for converting said at least one generated voltage to an intermediate DC voltage; and

a buck/boost stage adapted for converting said intermediate DC voltage to said DC link voltage.