Wind Park with Robust Reactive Power Adjustment System and Method for the Operation Thereof

• US 20080073912A1
• Filed: 09/30/2005
• Published: 03/27/2008
• Est. Priority Date: 10/01/2004
• Status: Active Grant

• Current Assignee: Siemens Gamesa Renewable Energy Service GmbH (Siemens AG)
• Original Assignee: REpower Systems AG (Senvion SE)
• Inventors: Letas, Heinz-Hermann, Fortmann, Jens
• Granted Patent: US 7,606,638 B2
• Time in Patent Office: Days
• US Class Current: 290/44
• CPC Class Codes: F03D 9/257 the wind motor being part of a wind farm
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy wind motors F03D
• CPC Class Codes: H02J 3/1885 using rotating means, e.g. synchronous generators
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/46 Controlling of the sharing of output between the generators, converters, or transformers
• 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
• CPC Class Codes: Y02E 40/30 Reactive power compensation

Abstract

A windpark includes at least two wind energy installations, each of which installations comprises a rotor, a generator driven by the rotor and a control device, and which are connected via connecting lines to a main line. The windpark also includes a linking point which connects the main line to a power transmission network, a parkmaster which is configured for power factor control and has communication lines for transmission of control signals to the wind energy installations, and a power-factor control section including a distributed regulator having a higher-level regulator located at the parkmaster which is configured to determine a nominal voltage in order to set a global power coefficient for the power which is emitted to the power transmission network and to emit the global power coefficient as a signal via the communication lines and lower-level regulators at the wind energy installations.

Claims

1. A windpark, comprising:

at least two wind energy installations, each of which installations comprises a rotor, a generator driven by the rotor and a control device, and which are connected via connecting lines to a main line,

the windpark further comprising a linking point which connects the main line to a power transmission network, a parkmaster which is configured for power factor control and has communication lines for transmission of control signals to the wind energy installations, and a power-factor control section comprising a distributed regulator having a higher-level regulator located at the parkmaster which is configured to determine a nominal voltage in order to set a global power coefficient for the power which is emitted to the power transmission network and to emit the global power coefficient as a signal via the communication lines and lower-level regulators at the wind energy installations which are in each case configured to calculate a local wattless-component nominal value from the signal for the nominal voltage, to detect an actual emitted voltage from the wind energy installation, and to correct the local wattless-component nominal values after comparison with the nominal voltage.

2. The windpark of claim 1, wherein the higher-level regulator comprises a compensation device for the connecting lines.

3. The windpark of claim 1 or 2, wherein the higher-level regulator has a correction-value memory which contains individual correction values for the wind energy installations including section parameters for the connecting lines.

4. The windpark of claim 2, further comprising an adaptive identification device is provided for the compensation device or for the individual correction values.

5. The windpark of claim 1 or 2, wherein the linking point is arranged on the high-voltage network and is connected to the main line via a high-voltage transformer.

6. The windpark of claim 5, wherein the measurement device is arranged on the main-line side of the high-voltage transformer.

7. The windpark of claim 1 or 2, wherein the control response of the distributed regulator has a time constant which is longer than that of voltage transients.

8. The windpark as of claim 1 or 2, wherein the distributed regulator has a limiting device for the nominal voltage.

9. The windpark of claim 8, wherein the limiting device is provided at the lower-level regulator.

10. The windpark claim 1 or 2, further comprising additional passive phase shifters.

11. The windpark of claim 10, wherein capacitor banks are provided as phase shifters for the wind energy installations.

12. (canceled)