CN108204342A - Blade icing identification method and device of wind driven generator - Google Patents
Blade icing identification method and device of wind driven generator Download PDFInfo
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- CN108204342A CN108204342A CN201611166295.5A CN201611166295A CN108204342A CN 108204342 A CN108204342 A CN 108204342A CN 201611166295 A CN201611166295 A CN 201611166295A CN 108204342 A CN108204342 A CN 108204342A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005259 measurement Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 238000010248 power generation Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
Provided are a blade icing identification method and device of a wind driven generator, wherein the identification method comprises the following steps: determining the current actual power generation power value of the wind driven generator; comparing the actual power generation power value with a first preset value; if the actual power generation power value is not smaller than a first preset value, determining the current pitch angle; the icing condition of the blade is determined from the current pitch angle. By adopting the blade icing identification method and device of the wind driven generator in the exemplary embodiment of the invention, the blade icing state can be identified based on the actual power generation power value and the pitch angle of the wind driven generator, and the accuracy and reliability of blade icing judgment are effectively improved.
Description
Technical field
All things considered of the present invention is related to technical field of wind power generation, more particularly, is related to a kind of leaf of wind-driven generator
Piece icing recognition methods and device.
Background technology
Wind-driven generator is generally operational in wind-resources than more rich area, and the environment faced is harsher, in low temperature
Or area and the season of severe cold, blade is often there is a situation where freezing, once blade icing, power output reduces, blade matter
Amount and the pneumatic imbalance that will appear cause blade and complete machine load to increase.So blade icing reduces unit under normal circumstances
Generated energy and service life, the long-time that wind-driven generator is will result directly under serious conditions is shut down, to the normal of wind power plant
Power generation impacts.
Invention content
A kind of blade icing recognition methods for being designed to provide wind-driven generator of exemplary embodiment of the present invention and
Device, the accuracy and reliability judged with the blade icing condition improved to wind-driven generator.
One side according to an exemplary embodiment of the present invention provides a kind of blade icing recognition methods of wind-driven generator,
The recognition methods includes：Determine the current actual generation power value of wind-driven generator；By the actual generation power value and the
One preset value is compared；If the actual generation power value is not less than the first preset value, it is determined that current propeller pitch angle；Root
The icing condition of blade is determined according to current propeller pitch angle.
Optionally, the step of determining the icing condition of blade according to current propeller pitch angle may include：By determining propeller pitch angle
It is compared with the second preset value；If the propeller pitch angle is less than the second preset value, the blade for identifying wind-driven generator is knot
Ice-like state；If the propeller pitch angle is not less than the second preset value, the blade for identifying wind-driven generator is non-icing condition.
Optionally, the recognition methods can further include：If the actual generation power value is less than the first preset value, know
The blade of other wind-driven generator is icing condition.
Optionally, described be compared the actual generation power value with the first preset value may include：It is sent out when in wind-force
Motor is in the state of limit power, and first preset value is limited performance number.
Optionally, described be compared the actual generation power value with the first preset value may include：It is sent out when in wind-force
Motor is in the state of non-limit power, and the first preset value is theoretical generated output value.
Optionally, the recognition methods can further include：Detect current actual wind speed；Determine wind-driven generator current
Theoretical generated output value under actual wind speed；The theoretical generated output value is compared with limit performance number；When the theory
When generated output value is more than limit performance number, determine that wind power generating set is in the state of limit power；When the theoretical power (horse-power) value not
During more than limit performance number, determine that wind power generating set is in the state of non-limit power.
Optionally, the recognition methods can further include：The environment temperature residing for wind-driven generator is detected, wherein, when described
When environment temperature is less than or equal to preset temperature, the current actual wind speed of detection wind-driven generator.
Another aspect according to an exemplary embodiment of the present invention provides a kind of blade icing identification dress of wind-driven generator
It puts, the identification device includes：Actual power determination unit determines the current actual generation power value of wind-driven generator；First
The actual generation power value is compared by comparing unit with the first preset value；Pitch angle determination unit, if the reality
Generated output value is not less than the first preset value, it is determined that current propeller pitch angle；Icing condition recognition unit, according to current pitch
Angle determines the icing condition of blade.
Optionally, determining propeller pitch angle can be compared by icing condition recognition unit with the second preset value, if described
Propeller pitch angle is less than the second preset value, then identifies the blade of wind-driven generator as icing condition, if the propeller pitch angle is not less than the
Two preset values, the then blade for identifying wind-driven generator are non-icing condition.
Optionally, if the actual generation power value is less than the first preset value, icing condition recognition unit can recognize that
The blade of wind-driven generator is icing condition.
Optionally, in the state of limit power is in wind-driven generator, first preset value is limited performance number.
Optionally, in the state of non-limit power is in wind-driven generator, the first preset value is theoretical generated output value.
Optionally, the identification device can further include：Wind speed measurement unit detects current actual wind speed；Theoretical power (horse-power)
Determination unit determines theoretical generated output value of the wind-driven generator under current actual wind speed；Second comparing unit, by described in
Theoretical generated output value is compared with limit performance number；Status determining unit, when the theoretical generated output value is more than limit power
During value, status determining unit can determine that wind power generating set is in the state of limit power, when the theoretical power (horse-power) value is no more than limit
During performance number, status determining unit can determine that wind power generating set is in the state of non-limit power.
Optionally, the identification device can further include：Temperature detecting unit detects the environment temperature residing for wind-driven generator
Degree, wherein, when the environment temperature is less than or equal to preset temperature, wind speed measurement unit can detect the current reality of wind-driven generator
Border wind speed.
Blade icing recognition methods and device using the above-mentioned wind-driven generator of exemplary embodiment of the present, Neng Gouji
The identification to blade icing condition is realized in the actual generation power value and propeller pitch angle of wind-driven generator, effectively increases blade
Freeze the accuracy and reliability judged.
Description of the drawings
Pass through the detailed description carried out with reference to the attached drawing for being exemplarily illustrated embodiment, exemplary embodiment of the present
Above and other objects, features and advantages will become apparent, wherein：
Fig. 1 shows the flow chart of the blade icing recognition methods of wind-driven generator according to an exemplary embodiment of the present invention；
Fig. 2 shows the streams of the step of being used to determine wind-driven generator state in which according to an exemplary embodiment of the present invention
Cheng Tu；
Fig. 3 shows the determining leaf according to an exemplary embodiment of the present invention in the case where wind-driven generator is in non-limit power
The flow chart of the step of icing condition of piece；
Fig. 4 shows the block diagram of the blade icing identification device of wind-driven generator according to an exemplary embodiment of the present invention；
Fig. 5 shows the frame of the device according to an exemplary embodiment of the present invention for being used to determine wind-driven generator state in which
Figure.
Specific embodiment
Now, different example embodiments is more fully described with reference to the accompanying drawings, wherein, some exemplary embodiments are attached
It is shown in figure.
Fig. 1 shows the flow chart of the blade icing recognition methods of wind-driven generator according to an exemplary embodiment of the present invention.
With reference to Fig. 1, in step slo, the current actual generation power value of wind-driven generator is determined.Here, using existing
The various methods having detect the current actual generation power value of wind-driven generator.
In step S20, the actual generation power value is compared with the first preset value, that is, judge wind-power electricity generation
Whether the current actual generation power value of machine is less than the first preset value.
The performance number as an example, the first preset value can be limited, it is preferable that the first preset value can be limited performance number and first in advance
If the product of coefficient.Here, the limit performance number can refer to the generated output value of pre-set wind-driven generator, art technology
Personnel can set the limit performance number according to the needs of actual conditions.The value range of first predetermined coefficient can be 0~1 between,
This allows for power grid and there is fluctuation, and the setting of the first preset value is limited performance number and the product of the first predetermined coefficient can effectively be kept away
Exempt from the result caused by power network fluctuation to judge by accident.
If the actual generation power value is less than the first preset value, the blade for identifying wind-driven generator is icing shape
State.
If the actual generation power value is not less than (that is, being more than or equal to) first preset value, step S30 is performed：Really
Propeller pitch angle before settled.Here, the current propeller pitch angle of wind-driven generator can be obtained using existing various methods.
At this point, the icing condition of blade can be determined according to current propeller pitch angle, specifically, in step s 40, can will determine
Propeller pitch angle be compared with the second preset value, that is, judge current propeller pitch angle whether be less than the second preset value.
As an example, the second preset value can be the theoretical propeller pitch angle under current actual wind speed, it is preferable that second is default
Value can be the product of the theoretical propeller pitch angle under current actual wind speed and third predetermined coefficient.It for example, can be according to wind-power electricity generation
The history data of machine pre-establishes wind speed, theoretical generated output value and the correspondence model of theoretical propeller pitch angle, is obtaining
After current actual wind speed, reason corresponding with current actual wind speed is determined according to the correspondence model pre-established
By propeller pitch angle.The value range of third predetermined coefficient can be 0~1 between, the second preset value is set as theoretical propeller pitch angle here
Erroneous judgement can be effectively reduced with the product of third predetermined coefficient, improves the accuracy of judgement.
If current propeller pitch angle is not less than (that is, being more than or equal to) second preset value, step S50 is performed：Identify wind-force
The blade of generator is non-icing condition.
If current propeller pitch angle is less than the second preset value, step S60 is performed：The blade for identifying wind-driven generator is knot
Ice-like state.
It should be understood that, it is preferable that it, can before the blade icing recognition methods for performing above-mentioned wind-driven generator shown in FIG. 1
It first determines wind-driven generator state in which, the blade to wind-driven generator is determined further according to wind-driven generator state in which
Freeze the concrete mode identified.
Fig. 2 shows the streams of the step of being used to determine wind-driven generator state in which according to an exemplary embodiment of the present invention
Cheng Tu.
With reference to Fig. 2, in step s 201, current actual wind speed is detected.Here, it can be examined using existing various methods
Current actual wind speed is surveyed, which can refer to the external wind speed of wind-driven generator.
It should be understood that before step S201 is performed, it is according to an exemplary embodiment of the present invention to be used to determine wind-driven generator
The step of state in which, can further include：The environment temperature residing for wind-driven generator is detected, when the environment temperature is less than or equal to
During preset temperature, step S201 (that is, detecting the current actual wind speed of wind-driven generator) is performed, when the environment temperature is more than in advance
If during temperature, the current actual wind speed of wind-driven generator is not detected.
As an example, the preset temperature can be the temperature that extraneous meteorological condition disclosure satisfy that ice-formation condition, it should be appreciated that
It is to determine whether extraneous meteorological condition meets ice-formation condition with the judgement to environment temperature in exemplary embodiment of the present, so
And the present invention is not limited thereto, those skilled in the art can judge whether wind-driven generator meets by detecting other parameter
Ice-formation condition, to perform the current practical wind of step S201 detection wind-driven generators when extraneous meteorological condition meets ice-formation condition
Speed.
In step S202, theoretical generated output value of the wind-driven generator under current actual wind speed is determined.
As the above analysis, wind speed and theoretical power generation work(can be pre-established according to the history data of wind-driven generator
The correspondence model of rate value, after current actual wind speed is obtained, according to the above-mentioned correspondence model pre-established come really
Fixed theoretical generated output value corresponding with current actual wind speed.
In step S203, the theoretical generated output value is compared with limit performance number, that is, judge the theoretical hair
Whether electrical power value is more than limit performance number.
At this point, the shape residing for can determining wind-driven generator according to the comparison result of theoretical generated output value and limit performance number
State, it is specific as follows：
If the theory generated output value is more than limit performance number, step S204 is performed：Determine that wind-driven generator is in
Limit the state of power.Preferably, in a state that wind-driven generator is in limit power, executable step S10 determines wind-power electricity generation
The current actual generation power value of machine.
If the theory generated output value limits performance number no more than (that is, being less than or equal to), step S205 is performed：It determines
Wind-driven generator is in the state of non-limit power, that is, wind-driven generator is free power generation mode.
When being in the state of non-limit power referring to Fig. 3 wind-driven generator is discussed in detail, to the leaf of wind-driven generator
The concrete mode of piece icing identification.
Fig. 3 shows the determining leaf according to an exemplary embodiment of the present invention in the case where wind-driven generator is in non-limit power
The flow chart of the step of icing condition of piece.
With reference to Fig. 3, in step S301, the current actual wind speed of wind-driven generator is compared with rated wind speed, that is,
Judge whether the current actual wind speed of wind-driven generator is less than rated wind speed.
If current actual wind speed is not less than (that is, being more than or equal to) rated wind speed, show at wind-driven generator at this time
Under big wind speed environments, executable step S10 determines the current actual generation power value of wind-driven generator, so that it is determined that blade
Icing condition.In the case, the first preset value can be theoretical generated output value, it is preferable that the first preset value can be theoretical hair
Electrical power value and the product of the second predetermined coefficient.As an example, the value range of the second predetermined coefficient can be 0~1 between, here
First preset value is set as to the product of theoretical generated output value and the second predetermined coefficient can effectively reduce erroneous judgement, improve and judge
Accuracy.
If current actual wind speed is less than rated wind speed, show that wind-driven generator is under small wind speed environments at this time,
Executable step S302：The current actual generation power value of wind-driven generator and theoretical generated output value are compared, that is, sentence
Whether disconnected current actual generation power value is less than theoretical generated output value.It preferably, can be by theoretical generated output value and second
The product of the predetermined coefficient actual generation power value current with wind-driven generator is compared.
If current actual generation power value is less than theoretical generated output value, step S303 is performed：Identify wind-force hair
The blade of motor is icing condition.
If current actual generation power value performs step not less than (that is, being more than or equal to) theoretical generated output value
S304：The blade for then identifying wind-driven generator is non-icing condition.
Preferably, current actual wind speed can be periodically detected when extraneous meteorological condition meets ice-formation condition, and is performed
It states recognition methods with the blade icing condition to wind-driven generator to judge, obtains blade of each time point to wind-driven generator
The recognition result of icing condition counts the recognition result of all blade icing conditions in predetermined amount of time, when blade is freezes
When the ratio (for example, percentage) that the recognition result of state accounts for the recognition result of all blade icing conditions reaches setting ratio,
Output blade is the recognition result of icing condition, and when aforementioned proportion is not up to setting ratio, output blade is non-icing condition
Recognition result.Here, count a period of time in continuous recognition result, be for improve blade icing condition is identified it is accurate
Property, final recognition result is caused deviation occur to avoid the erroneous judgement because of one or two data acquisition.It preferably, can be according to ability
The practical experience of field technique personnel determines the size of the setting ratio.
Fig. 4 shows the block diagram of the blade icing identification device of wind-driven generator according to an exemplary embodiment of the present invention.
As shown in figure 4, the blade icing identification device of wind-driven generator according to an exemplary embodiment of the present invention includes：It is real
Border power determining unit 10, the first comparing unit 20, pitch angle determination unit 30 and icing condition recognition unit 40.
Particularly, actual power determination unit 10 determines the current actual generation power value of wind-driven generator.Here, may be used
Utilize the current actual generation power value of existing various device detection wind-driven generators.
The actual generation power value is compared by the first comparing unit 20 with the first preset value, that is, judges that wind-force is sent out
Whether the current actual generation power value of motor is less than the first preset value.
The performance number as an example, the first preset value can be limited, it is preferable that the first preset value can be limited performance number and first in advance
If the product of coefficient.Here, the limit performance number can refer to the generated output value of pre-set wind-driven generator, art technology
Personnel can set the limit performance number according to the needs of actual conditions.The value range of first predetermined coefficient can be 0~1 between,
This allows for power grid and there is fluctuation, and the setting of the first preset value is limited performance number and the product of the first predetermined coefficient can effectively be kept away
Exempt from the result caused by power network fluctuation to judge by accident.
If the actual generation power value is not less than (that is, being more than or equal to) first preset value, pitch angle determination unit
30 determine current propeller pitch angle.Here, the current propeller pitch angle of wind-driven generator can be obtained using existing various devices.
If the actual generation power value is less than the first preset value, icing condition recognition unit 40 can recognize that wind-force is sent out
The blade of motor is icing condition.
Icing condition recognition unit 40 determines the icing condition of blade according to current propeller pitch angle.
For example, determining propeller pitch angle can be compared by icing condition recognition unit 40 with the second preset value, that is, judge to work as
Whether preceding propeller pitch angle is less than the second preset value, if the propeller pitch angle is less than the second preset value, icing condition recognition unit
The blade of 40 identification wind-driven generators is icing condition, if the propeller pitch angle is not less than (that is, being more than or equal to) second preset value,
Then icing condition recognition unit 40 identifies that the blade of wind-driven generator is non-icing condition.
As an example, the second preset value can be the theoretical propeller pitch angle under current actual wind speed, it is preferable that second is default
Value can be the product of the theoretical propeller pitch angle under current actual wind speed and third predetermined coefficient.For example, according to example of the present invention
The blade icing identification device of the wind-driven generator of property embodiment can further include：Gross data acquiring unit can be sent out according to wind-force
The history data of motor pre-establishes wind speed, theoretical generated output value and the correspondence model of theoretical propeller pitch angle, is obtaining
After obtaining actual wind speed currently, determined according to the correspondence model pre-established corresponding with current actual wind speed
Theoretical propeller pitch angle.The value range of third predetermined coefficient can be 0~1 between, the second preset value is set as theoretical pitch here
Angle and the product of third predetermined coefficient can effectively reduce erroneous judgement, improve the accuracy of judgement.
It should be understood that, it is preferable that in exemplary embodiments of the present invention, it can first determine wind-driven generator state in which, then
The concrete mode of the blade icing identification to wind-driven generator is determined according to wind-driven generator state in which.
Fig. 5 shows the frame of the device according to an exemplary embodiment of the present invention for being used to determine wind-driven generator state in which
Figure.
As shown in figure 5, the device according to an exemplary embodiment of the present invention for being used to determine wind-driven generator state in which
It may include：Wind speed measurement unit 501, theoretical power (horse-power) determination unit 502, the second comparing unit 503 and status determining unit 504.
Particularly, wind speed measurement unit 501 detects current actual wind speed.Here, using existing various devices
Current actual wind speed is detected, which can refer to the external wind speed of wind-driven generator.
Preferably, the device according to an exemplary embodiment of the present invention for being used to determine wind-driven generator state in which can be also
Including：Environment temperature detection unit detects the environment temperature residing for wind-driven generator, when the environment temperature is less than or equal to preset
During temperature, wind speed measurement unit 501 detects current actual wind speed, when the environment temperature is more than preset temperature, wind speed inspection
It surveys unit 501 and does not detect the current actual wind speed of wind-driven generator.
As an example, the preset temperature can be the temperature that extraneous meteorological condition disclosure satisfy that ice-formation condition, it should be appreciated that
It is to determine whether extraneous meteorological condition meets ice-formation condition with the judgement to environment temperature in exemplary embodiment of the present, so
And the present invention is not limited thereto, those skilled in the art can judge whether wind-driven generator meets by detecting other parameter
Ice-formation condition, it is current to detect wind-driven generator by wind speed measurement unit 501 when extraneous meteorological condition meets ice-formation condition
Actual wind speed.
Theoretical power (horse-power) determination unit 502 determines theoretical generated output value of the wind-driven generator under current actual wind speed.
As the above analysis, theoretical power (horse-power) determination unit 502 can be advance according to the history data of wind-driven generator
Wind speed and the correspondence model of theoretical generated output value are established, after current actual wind speed is obtained, according to what is pre-established
Above-mentioned correspondence model determines theoretical generated output value corresponding with current actual wind speed.
The theoretical generated output value is compared by the second comparing unit 503 with limit performance number, that is, judges the theory
Whether generated output value is more than limit performance number.
Status determining unit 504 determines wind-driven generator according to theoretical generated output value with limiting the comparison result of performance number
State in which.
If for example, the theory generated output value is more than limit performance number, status determining unit 504 determines wind-power electricity generation
Machine is in the state of limit power.Preferably, actual power determination unit 10 can wind-driven generator be in limit power in the state of,
Determine the current actual generation power value of wind-driven generator.
If the theory generated output value limits performance number no more than (that is, being less than or equal to), status determining unit 504 can
Determine that wind-driven generator is in the state of non-limit power, that is, wind-driven generator is free power generation mode.
When state of the wind-driven generator in non-limit power is described below, to 504 wind-driven generator of status determining unit
The concrete mode of blade icing identification.
Specifically, the blade icing identification device of wind-driven generator according to an exemplary embodiment of the present invention can further include：
The current actual wind speed of wind-driven generator is compared by the 4th comparing unit with rated wind speed, that is, judges that wind-driven generator is worked as
Whether preceding actual wind speed is less than rated wind speed.
If current actual wind speed is not less than (that is, being more than or equal to) rated wind speed, show at wind-driven generator at this time
Under big wind speed environments, actual power determination unit 10 can determine the current actual generation power value of wind-driven generator at this time.
In this case, the first preset value can be theoretical generated output value, it is preferable that the first preset value can be theoretical generated output value and the
The product of two predetermined coefficients.As an example, the value range of the second predetermined coefficient can be 0~1 between, here by the first preset value
Erroneous judgement can be effectively reduced by being set as theoretical generated output value and the product of the second predetermined coefficient, improve the accuracy of judgement.
The blade icing identification device of wind-driven generator according to an exemplary embodiment of the present invention can further include：Third compares
Unit if current actual wind speed is less than rated wind speed, shows that wind-driven generator is under small wind speed environments at this time, third
The current actual generation power value of wind-driven generator and theoretical generated output value can be compared by comparing unit, that is, judge to work as
Whether preceding actual generation power value is less than theoretical generated output value.
If current actual generation power value is less than theoretical generated output value, icing condition recognition unit 40 identifies wind
The blade of power generator is icing condition.
If current actual generation power value is not less than (that is, being more than or equal to) theoretical generated output value, icing condition
Recognition unit 40 then identifies that the blade of wind-driven generator is non-icing condition.
Preferably, wind speed measurement unit 501 can periodically detect current reality when extraneous meteorological condition meets ice-formation condition
Border wind speed, and the blade icing condition of wind-driven generator is judged by above-mentioned identification device, to obtain each time point to wind
The recognition result of the blade icing condition of power generator, icing condition recognition unit 40 count all blades in predetermined amount of time
The recognition result of icing condition, when the recognition result that blade is icing condition accounts for the ratio of the recognition result of all blade icing conditions
When example (for example, percentage) reaches setting ratio, 40 output blade of icing condition recognition unit is the recognition result of icing condition,
When aforementioned proportion is not up to setting ratio, 40 output blade of icing condition recognition unit is the recognition result of non-icing condition.
Here, count continuous recognition result in a period of time, be to improve the accuracy that is identified to blade icing condition, to avoid because
Erroneous judgement for one or two data acquisition causes final recognition result deviation occur.It here, can be according to those skilled in the art's
Practical experience determines the size of the setting ratio.
Blade icing recognition methods and device using the above-mentioned wind-driven generator of exemplary embodiment of the present, Neng Gouji
The identification to blade icing condition is realized in the actual generation power value and propeller pitch angle of wind-driven generator, effectively increases blade
Freeze the accuracy and reliability judged, is conducive to staff and timely and effectively wind-driven generator is safeguarded or used
Corresponding processing strategy, ensures the safe and stable operation of wind-driven generator, to extend the service life of wind-driven generator.
In addition, blade icing recognition methods and the device of above-mentioned wind-driven generator according to an exemplary embodiment of the present invention,
The identification of the blade icing condition to wind-driven generator in the case where limiting power rating can be achieved.
Moreover, it should be understood that in the blade icing identification device of wind-driven generator according to an exemplary embodiment of the present invention
Each unit can be implemented hardware component and/or component software.Those skilled in the art are held according to each unit of restriction
Capable processing, can such as use site programmable gate array (FPGA) or application-specific integrated circuit (ASIC) realize each list
Member.
In addition, the blade icing recognition methods of wind-driven generator according to an exemplary embodiment of the present invention may be implemented as
Computer code in computer readable recording medium storing program for performing.Those skilled in the art can realize according to the description to the above method
The computer code.The above method of the invention is realized when the computer code is performed in a computer.
Although the present invention, those skilled in the art are particularly shown and described with reference to its exemplary embodiment
It should be understood that in the case where not departing from the spirit and scope of the present invention that claim is limited, form can be carried out to it
With the various changes in details.
Claims (14)
1. a kind of blade icing recognition methods of wind-driven generator, which is characterized in that including：
Determine the current actual generation power value of wind-driven generator；
The actual generation power value is compared with the first preset value；
If the actual generation power value is not less than the first preset value, it is determined that current propeller pitch angle；
The icing condition of blade is determined according to current propeller pitch angle.
2. recognition methods as described in claim 1, which is characterized in that the icing condition of blade is determined according to current propeller pitch angle
The step of include：
Determining propeller pitch angle is compared with the second preset value；
If the propeller pitch angle is less than the second preset value, the blade for identifying wind-driven generator is icing condition；
If the propeller pitch angle is not less than the second preset value, the blade for identifying wind-driven generator is non-icing condition.
3. recognition methods as described in claim 1, which is characterized in that further include：If the actual generation power value is less than
First preset value, the then blade for identifying wind-driven generator are icing condition.
4. recognition methods as described in claim 1, which is characterized in that described to preset the actual generation power value with first
Value be compared including：
In the state of limit power is in wind-driven generator, first preset value is limited performance number.
5. recognition methods as described in claim 1, which is characterized in that described to preset the actual generation power value with first
Value be compared including：
In a state that wind-driven generator is in non-limit power, the first preset value is theoretical generated output value.
6. recognition methods as described in claim 4 or 5, which is characterized in that further include：
Detect current actual wind speed；
Determine theoretical generated output value of the wind-driven generator under current actual wind speed；
The theoretical generated output value is compared with limit performance number；
When the theoretical generated output value is more than limit performance number, determine that wind power generating set is in the state of limit power；
When the theoretical power (horse-power) value is no more than limit performance number, determine that wind-driven generator is in the state of non-limit power.
7. recognition methods as claimed in claim 6, which is characterized in that further include：Detect the environment temperature residing for wind-driven generator
Degree, wherein, when the environment temperature is less than or equal to preset temperature, the current actual wind speed of detection wind-driven generator.
8. a kind of blade icing identification device of wind-driven generator, which is characterized in that including：
Actual power determination unit determines the current actual generation power value of wind-driven generator；
The actual generation power value is compared by the first comparing unit with the first preset value；
Pitch angle determination unit, if the actual generation power value is not less than the first preset value, it is determined that current propeller pitch angle；
Icing condition recognition unit determines the icing condition of blade according to current propeller pitch angle.
9. identification device as claimed in claim 8, which is characterized in that icing condition recognition unit is by determining propeller pitch angle and the
Two preset values are compared, if the propeller pitch angle is less than the second preset value, the blade for identifying wind-driven generator is icing shape
State, if the propeller pitch angle is not less than the second preset value, the blade for identifying wind-driven generator is non-icing condition.
10. identification device as claimed in claim 8, which is characterized in that if the actual generation power value is less than first in advance
If value, then the blade of icing condition recognition unit identification wind-driven generator is icing condition.
11. identification device as claimed in claim 8, which is characterized in that in the state of limit power is in wind-driven generator,
First preset value is limited performance number.
12. identification device as claimed in claim 8, which is characterized in that when the state that non-limit power is in wind-driven generator
Under, the first preset value is theoretical generated output value.
13. the identification device as described in claim 11 or 12, which is characterized in that further include：
Wind speed measurement unit detects current actual wind speed；
Theoretical power (horse-power) determination unit determines theoretical generated output value of the wind-driven generator under current actual wind speed；
The theoretical generated output value is compared by the second comparing unit with limit performance number；
Status determining unit, when the theoretical generated output value is more than limit performance number, status determining unit determines wind-power electricity generation
Unit is in the state of limit power, and when the theoretical power (horse-power) value is no more than limit performance number, status determining unit determines that wind-force is sent out
Motor group is in the state of non-limit power.
14. identification device as claimed in claim 13, which is characterized in that further include：Temperature detecting unit detects wind-power electricity generation
Environment temperature residing for machine,
Wherein, when the environment temperature is less than or equal to preset temperature, the current reality of wind speed measurement unit detection wind-driven generator
Border wind speed.
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