Method for outputting control instructions or event messages for a first wind farm based on data received from a second wind farm

Abstract

A method for outputting control instructions to at least one first wind power installation or at least one first wind farm using an evaluation device or for outputting an event message relating to an operating state of the at least one first wind power installation or the at least one first wind farm using the evaluation device is provided. Data is received by the evaluation device from at least one further wind power installation or from at least one further wind farm and the control instructions or the event messages are generated by evaluating the data and are output by the evaluation device. An evaluation device and a system having the evaluation device for carrying out the method are also provided.

Claims

1. A method for controlling a first wind farm, the method comprising: receiving, by an evaluation device, data from at least one second wind farm, evaluating, using the evaluation device, the received data, determining, based on the received data, at least one control instruction for the first wind farm relating to an operating state of the first wind farm, and outputting, at an interface, the at least one control instruction to the first wind farm, wherein the first wind farm and the at least one second wind farm are connected to a control room via at least one data line, and the evaluation device is part of the control room, and wherein a plurality of wind farms are connected with the control room.

2. The method as claimed in claim 1, comprising: receiving first data indicative of first measured values captured using at least one first sensor of the first wind farm, receiving second data indicative of second measured values captured using at least one second sensor of the at least one second wind farm which is different from the first wind farm, controlling the first wind farm based on the first and second measured values, and outputting at least one event message relating to the operating state of the first wind farm based on the first and second measured values.

3. The method as claimed in claim 2, wherein first measured values from first sensors of the first wind farm and second measured values from second sensors of the at least one second wind farm are supplied to the evaluation device for outputting at least one of the at least one control instruction or the at least one event message, wherein the first sensors in the wind farms are each arranged in a substantially identical region or a substantially identical position.

4. The method as claimed in claim 2, wherein the at least one event message is a fault message.

5. The method as claimed in claim 1, wherein the first wind farm and the at least one second wind farm are at a maximum predefined distance of 100 km from each other.

6. The method as claimed in claim 2, comprising: receiving the second data indicating an ice build-up on a wind power installation of the at least one second wind farm, and outputting, by the evaluation device and to the first wind farm, control data for activating ice warning lights of wind power installations of the first wind farm.

7. The method as claimed in claim 1, comprising: receiving, by the evaluation device, the data with a first synchronization signal from the at least one second wind farm, and transmitting the at least one control instruction, to the first wind farm, as a second synchronization signal that is dependent on the first synchronization signal to cause aviation obstruction lights of wind power installations in the first wind farm or in the at least one second wind farm to synchronously flash.

8. The method as claimed in claim 1, wherein the evaluation device includes a control interface operable to connect further energy producers, that are not wind power installations, to the evaluation device for exchanging data with the evaluation device, wherein the further energy producers are controlled by data transmitted or received over the control interface.

9. The method as claimed in claim 1, comprising: receiving, by the evaluation device, regulation values including a power value or a reactive power value from a second wind farm regulator of the at least one second wind farm via the interface.

10. The method as claimed in claim 1, comprising: receiving, by the evaluation device, weather data via a data connection, processing, by the evaluation device, the weather data, and generating the at least one control instruction for controlling the first wind farm based on the weather data.

11. A device, comprising: a first interface configured to output a control instruction to at least one first wind farm, a second interface configured to receive data which are transmitted from a second wind farm, and an evaluation device configured to: receive the data over the second interface, evaluate the received data, determine, based on the received data, the control instruction, and output the control instruction to the at least one first wind farm over the first interface.

12. The device as claimed in claim 11, comprising: an interface configured to be connected to further energy producers that are not wind power installations.

13. A system, comprising: the device as claimed in claim 11, the at least one first wind farm, the second wind farm, and a data connection for exchanging data between the at least one first wind farm and the second wind farm.

14. The method as claimed in claim 4, comprising: detecting if a deviation of a first measured value from a second measured value or a reference value determined from the second measured values and is above a predefined threshold, and outputting the at least one event message if the deviation is above the predefined threshold.

15. The method as claimed in claim 14, comprising: averaging the second measured values to determine an average of the further measured values, and setting the reference value to the average of the second measured values.

16. The method as claimed in claim 5, wherein the maximum predefined distance is 500 m, 5 km, 10 km, 20 km or 50 km.

17. The method as claimed in claim 8, wherein the data transmitted or received over the control interface includes regulation values, desired power values or desired reactive power values.

18. The method as claimed in claim 9, wherein the evaluation device is part of the first wind farm or a first wind farm regulator of the first wind farm.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) Exemplary embodiments of the present invention are explained in more detail below, by way of example, with reference to the accompanying figures, in which:

(2) FIG. 1 shows a wind power installation,

(3) FIG. 2 shows a wind farm,

(4) FIG. 3 shows a first wind farm and a further wind farm,

(5) FIG. 4 shows the wind farms from FIG. 3 and a control room, and

(6) FIG. 5 shows measured values from a first wind power installation and from further wind power installations.

DETAILED DESCRIPTION

(7) FIG. 1 shows a wind power installation 100 having a tower 102 and a nacelle 104. A rotor 106 having three rotor blades 108 and a spinner 110 is arranged on the nacelle 104. During operation, the rotor 106 is caused to carry out a rotational movement by the wind and thereby drives a generator in the nacelle 104.

(8) The wind power installation 100 of FIG. 1 can also be operated in combination with a plurality of wind power installations 100 in a wind farm, as described below with reference to FIG. 2.

(9) FIG. 2 illustrates a wind farm 112 having three wind power installations 100 by way of example. The wind power installations 100 may be the same or different. The wind power installations 100 are therefore representative of fundamentally any desired number of wind power installations 100 in a wind farm 112. The wind power installations 100 provide their power, namely the generated current in particular, via an electrical farm network 114. In this case, the respectively generated currents or powers from the individual wind power installations 100 are added and a transformer 116 is usually provided, which transformer steps up the voltage in the farm in order to then feed it into the supply network 120 at the feed-in point 118 which is also generally referred to as the PCC.

(10) FIG. 2 is only a simplified illustration of a wind farm 112 which does not show any power control, for example, even though power control is naturally present. The farm network 114 may also be different, for example, by virtue of a transformer also being present at the output of each wind power installation 100, for example, to name just one other exemplary embodiment.

(11) FIG. 3 now shows a first wind farm 112a and a further wind farm 112b. The first wind farm 112a has a first wind power installation 100a and two wind power installations 100b and 100c. The further wind farm 112b has a further wind power installation 100d and the wind power installations 100e and 100f.

(12) The wind power installations 100a to 100c in the first wind farm 112a are connected to a first wind farm regulator 10 via a data connection 12. The wind power installations 100d to 100f are likewise connected to a further wind farm regulator 16 via a data line 14.

(13) The wind farm regulators 10 and 16 are set up to receive different default values or desired values from a network operator in order to regulate the power production of the individual wind power installations 100a to 100f in the wind farms 112a, 112b. For this purpose, the wind farm regulators 10, 16 have an interface which is not depicted here, however.

(14) In addition to the interface for specifying control values from the network operator, the first wind farm regulator 10 has an interface 18 and the further wind farm regulator 16 has an interface 20, the interfaces 18 and 20 being connected to one another via a data connection 22 for the purpose of interchanging data between the wind farm regulators 10, 16. The first wind farm regulator 10 also has an interface 23 and the further wind farm regulator 16 has an interface 25 in order to be able to interchange data with the respectively associated wind power installations 100a to 100f via the data connection 12, 14.

(15) In the present case, the first wind farm regulator 10 also comprises an evaluation device 24. The evaluation device 24 is configured to receive data from the further wind farm 112b or from the further wind power installation 100d via the data line 22. The data are then processed in the evaluation device 24 and a control instruction is output to the further wind power installation 100a or the wind power installations 100a to 100c in the further wind farm 112a via the data line 12.

(16) The evaluation device 24 is also configured to output an event message by virtue of the evaluation device also receiving and evaluating, via the data line 12, sensor data or data, which represent the state of the wind power installations 100a to 100c in the first wind farm 112a, in addition to the further data via the data line 22. The evaluation device 24 is therefore configured to output an event message, for example a fault message, on the basis of the first data or measured values received via the data line 12 and the further data or measured values received via the data line 22. This fault message can be displayed, for example, on a display of the first wind farm regulator 10.

(17) FIG. 4 shows an alternative exemplary embodiment of FIG. 3. Identical reference numerals correspond to identical features.

(18) The wind farms 112a and 112b are each again connected to a wind farm regulator 10, 16, in which case the wind farm regulators 10, 16 do not have the interfaces 18 and 20. Instead, the first wind farm regulator 10 has an interface 26 and the further wind farm regulator 16 has an interface 28. In the exemplary embodiment in FIG. 4, the first wind farm regulator 16 does not have an evaluation device 24. Instead, the evaluation device 24 is part of a control room 30.

(19) The control room 30 is, for example, a central data collection or control point to which a multiplicity of wind farms 112 are connected, the control room 30 being able to store and evaluate all recorded parameters or data from the connected wind power installations 100 or wind farms 112. The connected wind power installations 100 can also be remotely controlled using the control room 30.

(20) The evaluation device 24 comprises an interface 32 to which the interfaces 26 and 28 of the wind farm regulators 10 and 16 are connected via data lines 34 and 36. The evaluation device 24 in the control room 30 receives further data from the further wind farm 112b via the data line 36 and the interface 32, these further data being measured values from the wind power installations 100d to 100f, for example. The evaluation device 24 also receives first data from the first wind farm 112a via the data line 34, which first data are measured values from the wind power installations 100a to 100c, for example. Control instructions for the first wind farm 112a are then generated in the evaluation device 24 on the basis of the first measured values and the further measured values, and the wind power installations 100a to 100c in the first wind farm 112a are controlled using these control instructions.

(21) Event messages, for example fault messages, are also output on a display (not illustrated) of the control room 30 on the basis of the first and further data or measured values. For this purpose, the first and further data or measured values are processed on the basis of the example illustrated in the following FIG. 5.

(22) FIG. 5 shows a diagram representing measured values which are received from the first wind farm 112a and from the second wind farm 112b in the evaluation device 24. The vertical axis 40 corresponds to a temperature axis. The measured values 42a to 42f which are assigned to the individual wind power installations 100a to 100f are also represented. The measured values 42a to 42f each correspond to a measured temperature value in the region of a generator of the wind power installation 100a to 100f. The sensors are arranged at the substantially same position in all wind power installations 100a to 100f.

(23) It is also assumed here that the wind farms 112a and 112b are at a maximum distance of 100 km. In addition, a tolerance range 44 is represented by the upper limit value 46 and the lower limit value 48. All measured values 42a to 42f are within the tolerance range 44. However, it can be discerned that the measured value from the first wind power installation 100a, which corresponds to the measured value 42a, differs from a mean value of the measured values 42b to 42f by more than a threshold value 50. It can therefore be assumed in the present case that there is a fault in the first wind power installation 100a even though the measured value 42a is in the tolerance range 44.

(24) An event message, for example a fault message, can now be output here by the evaluation device 24 on account of the measured value 42a which differs from a reference value 52 represented by the mean value by more than a threshold value 50.

(25) Even though the first wind power installation 100a is still operating in a permitted range defined by the tolerance range 44, an irregularity can therefore already be identified and service personnel can be sent to the first wind power installation 100a, which personnel can monitor and possibly eliminate the reason for the differing measured value 42a without the first wind power installation 100a having to be disconnected from the network on account of a fault. It is therefore possible to react to an imminent fault in good time.