Wind energy turbine and wind farm consisting of a plurality of wind energy turbines

• US 20040027095A1
• Filed: 10/02/2003
• Published: 02/12/2004
• Est. Priority Date: 11/28/2000
• Status: Active Grant

• Current Assignee: Aloys Wobben
• Original Assignee: Aloys Wobben
• Inventors: Wobben, Aloys
• Granted Patent: US 6,906,431 B2
• Time in Patent Office: Days
• US Class Current: 322/20
• CPC Class Codes: F03D 9/257 the wind motor being part of a wind farm
• CPC Class Codes: F05B 2260/96 Preventing, counteracting or reducing vibration or noise
• CPC Class Codes: F05B 2270/1033 Power (if explicitly mentioned)
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy wind motors F03D
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/48 Controlling the sharing of the in-phase component
• CPC Class Codes: H02J 3/50 Controlling the sharing of the out-of-phase component
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects

Abstract

A wind power facility having a plurality of wind power installations, the wind power installations connected to a current voltage network into which the electrical current generated is fed or delivered that, independent of the currently prevailing amount of wind and the active power that is thus available from the wind power installation, a constant apparent power is always delivered into the network. A device for regulating the power to be delivered to a current voltage network is provided so that the regulation is so adjusted to have a constant apparent power always fed to the network.

Claims

1. A wind power system for delivering power to a network, comprising:

a plurality of wind power installations having a device for regulating the power to be delivered to the network, wherein the regulation is so adjusted that a constant apparent power is always fed to the network.

2. The wind power system of claim 1 wherein the apparent power is calculated in accordance with the following formula:

3. The wind power system of claim 2 wherein the device for regulating the power comprises a rectifier coupled to the wind power installations, a frequency converter coupled to the rectifier and controlled by a microprocessor coupled thereto.

4. A wind park for delivering electric power to a network, comprising:

at least one wind power generator configured to generate active power in response to wind;

a reactive power supply; and

a regulating device coupled to the at least wind power generator and the reactive power supply for supplying constant apparent power to the network.

5. The wind park of claim 4 wherein the regulating device is configured to supply constant apparent power to the network in accordance with the following formula:

6. The wind park of claim 5 wherein the regulating device comprises a rectifier coupled to the at least one wind power generator, a frequency converter coupled to an output of the rectifier, and a microprocessor coupled to an output of the frequency converter and having an output coupled to a control input of the frequency converter, the microprocessor configured to regulate reactive power in reciprocal relationship with the active power.

7. The wind park of claim 6 wherein the regulating device is further configured to combine active power and reactive power to increase total power output to the network in response to network demand for increased total power.

8. The wind park of claim 4 wherein the reactive power supply comprises a capacitive power supply.

9. The wind park of claim 4 wherein the reactive power supply comprises an inductive power supply.

10. A method of supplying constant apparent power to a network coupled to a wind power installation having at least one wind-powered generator, the method comprising:

configuring the at least one wind-powered generator to generate active power in response to wind;

rectifying the active power from the at least one wind-powered generator;

converting the rectified power;

supplying reactive power; and

regulating the active power and the reactive power to output a constant apparent power to the network.

11. The method of claim 10 wherein the reactive power is regulated in reciprocal relationship with the active power to achieve the constant apparent power.

12. The method of claim 10 wherein the active power and the reactive power are regulated in accordance with the following formula:

13. The method of claim 10 wherein regulating further comprises combining active power and reactive power to increase total power output to the network in response to network demand for increased total power.

14. A device for regulating power generated from a wind power installation for delivery to a network, the device comprising:

a rectifier coupled to the wind power installation to receive power generated in response to wind and to output dc voltage;

a frequency converter coupled to the rectifier and configured to receive the dc voltage from the rectifier and to convert the dc voltage into an ac voltage that is output to the network; and

a control device coupled to the output of the frequency converter and having an output coupled to a control input of the frequency converter, the control device configured to regulate the frequency converter to output constant apparent power to the network that comprises active power from the dc voltage at the rectifier output with reactive power from a reactive power supply in accordance with the following formula;

S={square root}{square root over (P²+Q²)}

where

S is the magnitude of the apparent power;

P is the magnitude of the active power, and

Q is the magnitude of the reactive power.

15. The device of claim 14 wherein the control device comprises a microprocessor configured to regulate voltage supplied to the network as well as current and phase in response to inputs comprising the apparent power S, the active power P, a reactive power factor, and a power gradient dP/dT.

16. The device of claim 14 wherein the control device is configured to combine active power and reactive power to increase total output voltage to the network in response to network demands for increased total voltage output.