CN113586355B - Method and device for identifying blade clamping fault of wind generating set - Google Patents
Method and device for identifying blade clamping fault of wind generating set Download PDFInfo
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- CN113586355B CN113586355B CN202010364023.6A CN202010364023A CN113586355B CN 113586355 B CN113586355 B CN 113586355B CN 202010364023 A CN202010364023 A CN 202010364023A CN 113586355 B CN113586355 B CN 113586355B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/60—Control system actuates through
- F05B2270/602—Control system actuates through electrical actuators
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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
Abstract
The invention provides a method and a device for identifying a wind generating set propeller clamping fault. The method comprises the following steps: acquiring operating parameters of the first variable pitch motor and the second variable pitch motor; determining whether the acquired operating parameters of the first variable pitch motor and the second variable pitch motor are abnormal; and determining that the wind generating set has a blade clamping fault when the abnormality exists. By the method and the device, the failure of the paddle clamping can be timely and accurately identified.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a method and a device for identifying a blade clamping fault of a wind power generator set.
Background
One main function of the variable pitch system is to serve as a pneumatic brake system of the wind generating set, and the electric variable pitch system ensures the safe and stable operation of the wind generating set through various detection and control means and multiple redundancy design. Any shutdown caused by a fault will feather the blades to a 90 degree safe position.
However, in the operation process of the wind turbine generator system, a driver of a pitch system, a pitch motor or a backup power supply may have faults, so that blades of the wind turbine generator cannot be retracted to a safe position, and the rotating speed of the wind turbine generator cannot be reduced under the action of wind force, thereby causing overspeed and even a runaway danger of the wind turbine generator. Therefore, the identification of the failure of the clamping paddle is important for ensuring the safe operation of the wind generating set.
Currently, the detection of the pitch angle is based on detecting the operational data of the wind turbine generator system, for example, detecting the vibration data or the pitch angle. However, the machine set vibration often occurs under specific operating conditions, so the method for identifying the propeller clamping based on the operating data has certain limitations.
Disclosure of Invention
The invention aims to provide a method and a device for identifying a blade clamping fault of a wind turbine generator system, which at least solve the technical problems and provide the following beneficial effects.
One aspect of the present invention provides a method for identifying a blade-sticking fault of a wind turbine generator system, wherein the wind turbine generator system at least includes a first pitch motor and a second pitch motor electrically connected to different blades, respectively, and configured to drive the different blades to perform a pitch variation action, and the method includes: acquiring operating parameters of a first variable pitch motor and a second variable pitch motor; determining whether the acquired operating parameters of the first variable pitch motor and the second variable pitch motor are abnormal; and when the abnormality exists, determining that the wind generating set has a blade clamping fault.
Another aspect of the present invention provides an apparatus for identifying a blade-locking fault of a wind turbine generator system, including: the acquisition module is configured to acquire operating parameters of the first variable pitch motor and the second variable pitch motor; and the processing module is configured to determine whether the acquired operating parameters of the first variable pitch motor and the second variable pitch motor are abnormal, and determine that a blade clamping fault occurs in the wind generating set when the abnormal operating parameters exist.
Another aspect of the present invention provides a controller, including: a processor and a memory; the storage stores a computer program, and when the computer program is executed by the processor, the method for identifying the blade-clamping fault of the wind generating set is realized.
Another aspect of the present invention is to provide a computer storage medium, which when being executed by a processor, implements the above-mentioned method for identifying a wind turbine generator system blade-sticking fault.
According to the method and the device provided by the embodiment of the invention, the blade clamping fault is identified based on the operation parameters of the variable pitch motor, the influence of the operation state of the wind generating set on the blade clamping fault identification result is fully considered, and the blade clamping fault can be identified timely and accurately in the full operation period of the wind generating set.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate, by way of example, an example in which:
FIG. 1 is a schematic view of a pitch system configuration.
Fig. 2 is a flowchart of a method of identifying a card-paddle fault according to an exemplary embodiment of the present invention.
Fig. 3 is a block diagram of a structure of a device for identifying a malfunction of a card paddle according to an exemplary embodiment of the present invention.
Fig. 4 is a block diagram of a controller according to an exemplary embodiment of the present invention.
Detailed Description
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of the embodiments of the disclosure as defined by the claims and their equivalents. Various specific details are included to aid understanding, but these are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the disclosure. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
For a better understanding of the invention, a necessary description of the electrical structure and the associated operating logic relating to the pitch system of the wind power plant, in particular the pitch drives, is first given.
FIG. 1 shows a schematic structural diagram of a pitch system, which includes a pitch motor, a super capacitor, a pitch controller and a pitch driver.
The working principle of the variable pitch system is as follows: under normal conditions, the enabling switch is in a closed state, and the variable-pitch driver is electrified; when the variable pitch controller receives a variable pitch speed signal of the main controller, or the variable pitch controller detects that a variable pitch system has a fault and is automatically feathered, the variable pitch controller sends the variable pitch speed signal and an enabling signal to the variable pitch driver; after receiving the variable pitch speed signal and the enabling signal, the variable pitch driver controls the brake relay to release, outputs voltage at the power output port, and drives the variable pitch motor to rotate, so that the variable pitch function is realized.
The variable pitch driver acquires an increment signal of the encoder, is used for calculating the rotating speed of the variable pitch motor and is used for comparing with a variable pitch speed signal value sent to the variable pitch driver by the variable pitch controller; if the calculated rotating speed of the variable pitch motor is less than the variable pitch speed signal, the variable pitch controller increases the voltage of power output so as to increase the rotating speed of the variable pitch motor; if the calculated rotating speed of the variable pitch motor is greater than the variable pitch speed signal, the variable pitch controller can reduce the voltage of power output so as to reduce the rotating speed of the variable pitch motor, and finally the rotating speed of the variable pitch motor is consistent with the given variable pitch speed signal value. Meanwhile, the variable pitch driver detects the state of an external electrical element, and stops power output if a fault is triggered. At the moment, the variable pitch motor loses power input, and cannot complete feathering action, so that the oar is blocked.
It can be understood that: the wind generating set generally includes at least two sets of pitch systems shown in fig. 1, and a pitch motor in each set of pitch system is electrically connected to one blade and is responsible for driving the blade to execute a pitch action. The embodiment of the invention is only described for a wind generating set (hereinafter, referred to as a "first pitch motor" and a "second pitch motor") with two pitch motors, wherein the first pitch motor and the second pitch motor are respectively and electrically connected with a first pitch motor and a second pitch motor of different blades, and are used for driving the different blades to execute pitch variation actions. The wind generating set may further include three or more pitch motors, which are not described in detail in the embodiment of the present invention.
Fig. 2 shows a flow chart of an exemplary method according to the present invention.
In step S101, operation parameters of the first pitch motor and the second pitch motor are obtained.
As an example, the operating parameters may include current, voltage, and temperature of the pitch motor.
As an example, the current, voltage and temperature acquisition devices are arranged in the pitch motor to respectively acquire the current, voltage and temperature, and the acquired data can be sent to a main controller of the wind generating set or a wind power plant centralized control center in a wireless transmission or wired transmission manner.
As an example, the operational parameters of the pitch motor may be extracted from a fault file. The fault file may be a file stored in the main controller of the wind generating set and recording data related to the fault, such as: extracting the current, the voltage, the temperature and the like of the variable pitch motor, and the operation parameters can be executed by a processor of the main controller, optionally, the processor periodically (for example, 20ms, 1s, 1min and the like) reads a fault file, and extracts fault data in the file; or, the reading of the fault file is only carried out when the running state of the wind generating set meets the preset condition. It will be appreciated that data within a failed file will only be written when a failure occurs, and that no data will be within the failed file when no failure occurs.
It can be understood that the operation parameters are preferentially extracted from the fault file, so that the cost increase caused by additionally installing the acquisition parameters can be saved, but if the internal communication of the wind generating set is interrupted, the operation parameters cannot be extracted from the fault file. Therefore, in order to improve the success rate of acquiring the operation parameters, the acquisition device can be used for continuously acquiring the operation parameters after internal communication is interrupted.
In step S102, it is determined whether the acquired operating parameters of the first pitch motor and the second pitch motor are abnormal.
Specifically, when the variable pitch system is in operation, the blades rotate simultaneously, so the azimuth angles of the blades also change periodically, and the average energy consumption of the blades is approximately the same in each rotation period (0-360 degrees). Thus, according to the law of conservation of energy: it can be known that the average values of the voltage U and the current I in each blade rotation period are the same, i.e. the total energy UI is the same. Therefore, the operation parameters of the first variable pitch motor and the second variable pitch motor in a preset time period can be obtained; and if the difference exists between the running parameter statistic value of the first variable pitch motor and the running parameter statistic value of the second variable pitch motor in the preset time period, determining that the running parameters of the first variable pitch motor and the second variable pitch motor are abnormal.
As an example, when the operation parameter statistics of the first pitch motor and the operation parameter statistics of the second pitch motor are the respective current sums of the first pitch motor and the second pitch motor at all sampling moments in the predetermined time period, respectively. And if the difference value between the current sum of the first variable pitch motor and the current sum of the second variable pitch motor reaches a preset threshold value in the preset time period, determining that the difference exists between the running parameter statistic value of the first variable pitch motor and the running parameter statistic value of the second variable pitch motor in the preset time period, and further determining that the running parameters of the first variable pitch motor and the second variable pitch motor are abnormal.
As an example, when the operating parameter is voltage, the operating parameter statistical value of the first pitch motor and the operating parameter statistical value of the second pitch motor are respectively the sum of the voltages of the first pitch motor and the second pitch motor at all sampling moments in a predetermined time period. And if the difference value between the voltage sum of the first variable pitch motor and the voltage sum of the second variable pitch motor reaches a preset threshold value in a preset time period, determining that the difference exists between the operating parameter statistic value of the first variable pitch motor and the operating parameter statistic value of the second variable pitch motor in the preset time period, and further determining that the operating parameters of the first variable pitch motor and the second variable pitch motor are abnormal.
Further, the relationship between the heat generated by the heating of the pitch motor and the temperature is as follows: heat-mass-specific heat-capacity-temperature change, i.e.:
Q＝CM(T2-T1) (1)
meanwhile, for the motor:
Q＝I 2 *R*t (2)
thus, combining equations (1) and (2) yields:
I 2 ＝CM(T2-T1)/R/t (3)
where Q is heat, C is the specific heat capacity of the object, M is mass, T2 is the current temperature, T1 is the initial temperature, R is the coil resistance, I is the current, and T is time.
The CM/R in the formula (3) can be regarded as a constant, and all the variable pitch motor parameters of the same wind generating set are the same, so that the temperature change rate of the motor is in direct proportion to the square of the current of the motor. That is, under normal conditions, the temperature values of the three pitch motors are also consistent.
As an example, when the operation parameter is temperature, the operation parameter statistical value of the first pitch motor and the operation parameter statistical value of the second pitch motor are the respective temperature change rates of the first pitch motor and the second pitch motor in a predetermined time period. And if the difference value between the temperature change rate of the first variable pitch motor and the temperature change rate of the second variable pitch motor reaches a preset threshold value in a preset time period, determining that the difference exists between the running parameter statistic value of the first variable pitch motor and the running parameter statistic value of the second variable pitch motor in the preset time period, and further determining that the running parameters of the first variable pitch motor and the second variable pitch motor are abnormal.
It is understood that the predetermined time period cannot be too long, because there is a situation that the paddle is recovered again for a short time, and if the predetermined time period is too long, it is easy to cause that the malfunction of the paddle in this situation cannot be identified. Meanwhile, the predetermined time period cannot be too short, because the operation parameters of the pitch motor often have certain fluctuation, and the fluctuation is generated along with the change of the operation environment (such as wind speed) of the wind generating set. If the preset time is too short, the failure of the clamping paddle is easily reported.
For some reasons, the operation parameters acquired within the predetermined time period may not correctly reflect the actual situation, for example, when the failure of the paddle card happens at the end of the predetermined time period, the really valid data only exists in a short time from the time of the failure occurrence to the end of the predetermined time period, which may cause that the difference between the operation parameter statistics cannot be reflected. Therefore, in order to more accurately identify the failure of the paddle, an effective solution needs to be provided to deal with the occurrence of such a situation.
As an example, the rotating speed of the variable pitch motor is given through a variable pitch driver, and if the difference is generated between the actual rotating speed and the given value, the variable pitch motor can be judged to be abnormal. At this time, the reaction is that the pitch variation speed is reduced in the pitch variation action of the blade, and the specified pitch variation angle cannot be completed in normal time. Therefore, the average rotating speed of the first variable pitch motor and the average rotating speed of the second variable pitch motor in the preset time period can be obtained, and if the average rotating speed of any variable pitch motor is smaller than the average given rotating speed of any variable pitch motor in the preset time period, it is determined that a difference exists between the operating parameter statistical value of the first variable pitch motor and the operating parameter statistical value of the second variable pitch motor in the preset time period.
As an example, since a change in temperature requires a relatively long process, it is difficult to make a significant change in a short time. Therefore, in order to ensure that the failure of the paddle card can be identified in time, the current or the voltage can be preferentially acquired because the current and the voltage change very quickly and the changes can be quickly reflected in specific values. In addition, compared with the voltage, the probability that the current exists in the fault file is higher, so that the acquisition according to the sequence of the current, the voltage and the temperature ensures the timeliness of the fault identification of the paddle card, the success rate of the acquisition of the operation parameters is ensured, and the failure of the fault identification of the paddle card caused by the problem of the acquisition of the parameters is avoided to the greatest extent.
As another example, after current is drawn, voltage and temperature are not drawn; when the current cannot be obtained, the voltage is preferentially obtained; when the voltage is obtained, the temperature is not obtained any more, and when the voltage cannot be obtained, the temperature is obtained. This can further improve the failure recognition efficiency. It will be appreciated that any combination of current, voltage and temperature acquisition sequences and rules may be used when a balance between efficiency, accuracy and reliability of the identification of a stuck blade fault is desired.
As an example, in order to effectively utilize the characteristics of different operating parameters so that the operating parameter statistics are more accurate, different preset period lengths and preset thresholds may be set for current, voltage and temperature. The preset time period for acquiring the current and the voltage is shorter than the preset time period for acquiring the temperature, so that the characteristic that the current and the voltage change rapidly and the characteristic that the temperature change is slower are effectively utilized. For the preset threshold value of the current and the voltage, the current or voltage ratio of the first pitch motor and the second pitch motor may be calculated, for example, when the ratio is greater than 3, it is determined that there is a difference in the operating parameter between the first pitch motor and the second pitch motor. For the preset threshold value of the temperature, the difference of the temperature change rates between the first variable pitch motor and the second variable pitch motor can be judged by calculating the distance between the temperature change rate curves, for example, by adopting a mahalanobis distance algorithm. For example, when the distance is greater than 2, then a difference in operating parameters between the first pitch motor and the second pitch electrode is determined.
In step S103, determining that the wind generating set has a blade-locking fault when the abnormality exists.
Specifically, when the operating parameters of the pitch motor are abnormal, it can be determined that the pitch motor is abnormal or has a fault. Because the function of the variable pitch motor is to drive the blades to execute variable pitch action, when the variable pitch motor is abnormal or fails, the blades lose the driving force of variable pitch, and the blades are blocked. The blocking of the propeller is an appearance of the fault of the pitch system, and in order to further understand the nature of the fault, when the occurrence of the blocking of the propeller is determined, the abnormal operation parameters of the pitch motor can be analyzed to identify the cause of the blocking of the propeller. Specifically, since the pitch motor provides power input for the blade to perform the pitch action, if the sum of the current or the sum of the voltage of one of the first pitch motor and the second pitch motor is zero, it indicates that the pitch driver driving the pitch motor has stopped operating, thereby triggering a blade jam fault. If the current or the voltage of the shaft where a certain variable pitch motor is located suddenly rises in a short time, the variable pitch bearing where the variable pitch motor is located is possibly blocked, and therefore the occurrence of the fault of the blocked pitch is caused. Therefore, when the sum of the current or the sum of the voltage of one of the first pitch motor and the second pitch motor exceeds a preset threshold value by 50%, it is determined that a pitch bearing is abnormal, and thus a blade clamping fault is triggered.
In summary, in this embodiment, statistical analysis is performed on the obtained operating parameters of the pitch motor that provides power for the blades, so that the blade jamming can be identified at the first time, and the reason for the blade jamming fault can be identified by further analyzing the operating parameters, thereby effectively avoiding the problem that the blade jamming fault cannot be identified due to the fact that the vibration is not obvious in the start-up operation stage of the wind turbine generator system.
Fig. 3 is a block diagram of a structure of a device for identifying a malfunction of a card paddle according to an exemplary embodiment of the present invention.
As shown in fig. 3, the device 3 for identifying a blade-jamming failure of a wind turbine generator system based on a fault code includes: an acquisition module 301 and a processing module 302.
The receiving module 301 is configured to acquire operating parameters of the first pitch motor and the second pitch motor;
the processing module 302 is configured to determine whether the obtained operating parameters of the first pitch motor and the second pitch motor are abnormal, and determine that a blade-locking fault occurs in the wind generating set when the abnormality exists.
As an example, the operating parameters may include current, voltage, and temperature of the pitch motor.
As an example, the current, voltage and temperature acquisition devices are arranged in the pitch motor to respectively acquire the current, voltage and temperature, and the acquired data can be sent to the receiving module 301 through wireless transmission or wired transmission.
As an example, the receiving module 301 may extract the operational parameters of the pitch motor from a fault file. The fault file may be a file stored in the main controller of the wind generating set and recording data related to the fault, such as: current, voltage, temperature, etc. of the pitch motor. Optionally, the receiving module 301 periodically (for example, 20ms, 1s, 1min, etc.) reads the fault file, and extracts fault data in the file; or, the reading of the fault file is only carried out when the running state of the wind generating set meets the preset condition. It will be appreciated that data within a failed file will only be written when a failure occurs, and that no data will be within the failed file when no failure occurs.
As an example, the processor 302 obtains operating parameters of the first pitch motor and the second pitch motor within a predetermined time period; and if the difference exists between the running parameter statistic value of the first variable pitch motor and the running parameter statistic value of the second variable pitch motor in the preset time period, determining that the running parameters of the first variable pitch motor and the second variable pitch motor are abnormal.
By way of example, when a stuck-blade fault is determined to occur, processor 302 analyzes the abnormal pitch motor operating parameters to identify the cause of the stuck-blade fault. Specifically, since the pitch motor provides power input for the blade to perform the pitch action, if the sum of the current or the sum of the voltage of one of the first pitch motor and the second pitch motor is zero, it indicates that the pitch driver driving the pitch motor has stopped operating, thereby triggering a blade jam fault. If the current or the voltage of the shaft where a certain variable pitch motor is located suddenly rises in a short time, the variable pitch bearing where the variable pitch motor is located is possibly blocked, and therefore the occurrence of the fault of the blocked pitch is caused. Therefore, when the sum of the current or the sum of the voltage of one of the first pitch motor and the second pitch motor exceeds a preset threshold value by 50%, it is determined that a pitch bearing is abnormal, and thus a blade clamping fault is triggered.
The embodiment carries out statistical analysis to the operating parameters of the obtained variable pitch motor, can identify the first time when the blocking of the propeller occurs, can identify the reason causing the blocking of the propeller fault through further analysis of the operating parameters, and effectively avoids the problem that the blocking of the propeller cannot be identified due to the fact that vibration is not obvious in the starting operation stage of the wind generating set.
Fig. 4 illustrates a block diagram of a controller according to an exemplary embodiment of the present invention.
As shown in fig. 4, the controller 4 includes a processor 401 and a memory 402. In particular, the memory 402 is used for storing a computer program which, when executed by the processor 401, implements the above described card paddle identification method.
As an example, the controller 4 may be a main controller deployed within the wind park or a sub-controller interacting with the main controller, for example: a pitch controller.
The processor 401 may be implemented by a general-purpose hardware processor such as a digital signal processor or a field programmable gate array, or may be implemented by a special-purpose hardware processor such as a dedicated chip.
There is also provided, in accordance with an exemplary embodiment of the present invention, a computer-readable storage medium storing a computer program. The computer readable storage medium stores a computer program that, when executed by a processor, causes the processor to perform the above-described card blade fault identification method. The computer readable recording medium is any data storage device that can store data read by a computer system. Examples of the computer-readable recording medium include: read-only memory, random access memory, compact disc read-only memory, magnetic tape, floppy disk, optical data storage device, and carrier wave (such as data transmission through the internet via a wired or wireless transmission path).
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (9)
1. A method for identifying a blade-clamping fault of a wind generating set, wherein the wind generating set at least comprises a first variable-pitch motor and a second variable-pitch motor which are respectively and electrically connected with different blades, and the first variable-pitch motor and the second variable-pitch motor are used for driving the different blades to execute variable-pitch actions, and the method is characterized by comprising the following steps:
acquiring operating parameters of the first variable pitch motor and the second variable pitch motor;
determining whether the obtained operation parameters of the first variable pitch motor and the second variable pitch motor are abnormal or not;
determining that the wind generating set has a blade clamping fault when the wind generating set is abnormal;
wherein the operating parameter comprises current, voltage and/or temperature;
the step of determining whether the acquired operation parameters of the first variable pitch motor and the second variable pitch motor are abnormal comprises the following steps:
acquiring operating parameters of the first variable pitch motor and the second variable pitch motor in a preset time period;
if the difference exists between the running parameter statistic value of the first variable pitch motor and the running parameter statistic value of the second variable pitch motor in the preset time period, determining that the running parameters of the first variable pitch motor and the second variable pitch motor are abnormal;
the step of obtaining the operating parameters of the first pitch motor and the second pitch motor in a preset time period comprises the following steps:
obtaining current preferentially, and after obtaining the current, not obtaining voltage and temperature;
when the current cannot be obtained, the voltage is preferentially obtained;
when the voltage is obtained, the temperature is not obtained any more, and when the voltage cannot be obtained, the temperature is obtained.
2. The identification method according to claim 1, characterized in that it comprises:
when the operating parameter is current, the operating parameter statistic of the first variable pitch motor and the operating parameter statistic of the second variable pitch motor are respectively the current sum of the first variable pitch motor and the second variable pitch motor at all sampling moments in the preset time period;
when the operating parameter is voltage, the operating parameter statistic of the first variable pitch motor and the operating parameter statistic of the second variable pitch motor are respectively the voltage sum of the first variable pitch motor and the second variable pitch motor at all sampling moments in the preset time period;
when the operating parameter is temperature, the operating parameter statistic of the first pitch variation motor and the operating parameter statistic of the second pitch variation motor are respectively the temperature change rate of the first pitch variation motor and the temperature change rate of the second pitch variation motor in the preset time period.
3. The identification method according to claim 2, characterized by determining that there is a difference between the operating parameter statistics of the first pitch motor and the operating parameter statistics of the second pitch motor within the predetermined time period when any one of the following conditions is met, said conditions comprising:
within the preset time period, the difference value between the current sum of the first variable pitch motor and the current sum of the second variable pitch motor reaches a preset threshold value;
within the preset time period, the difference value between the voltage sum of the first variable pitch motor and the voltage sum of the second variable pitch motor reaches a preset threshold value;
and in the preset time period, the difference value between the temperature change rate of the first variable pitch motor and the temperature change rate of the second variable pitch motor reaches a preset threshold value.
4. The identification method according to claim 3, wherein in the case where none of the conditions is satisfied, the method comprises:
and acquiring the average rotating speed of the first variable pitch motor and the average rotating speed of the second variable pitch motor in the preset time period, and determining that a difference exists between the operating parameter statistic of the first variable pitch motor and the operating parameter statistic of the second variable pitch motor in the preset time period if the average rotating speed of any variable pitch motor is less than the average given rotating speed of any variable pitch motor in the preset time period.
5. The identification method according to claim 2, characterized in that the method further comprises:
and when the wind generating set is determined to have a paddle clamping fault, analyzing the abnormal operation parameters to identify the reason causing the paddle clamping fault.
6. The method of claim 5, wherein the step of analyzing the abnormal operating parameters to identify the cause of the jam-paddle fault comprises:
if the sum of the currents or the sum of the voltages of one of the first variable pitch motor and the second variable pitch motor is zero, determining that a pitch driver fails to trigger a pitch jam;
and if the sum of the current or the sum of the voltage of one of the first variable pitch motor and the second variable pitch motor exceeds a preset threshold value by 50%, determining that the propeller clamping is triggered by the abnormal variable pitch bearing.
7. The utility model provides an identification means of wind generating set card oar trouble, wind generating set includes at least with different paddle electric connection's first change oar motor and second change oar motor respectively for the drive different paddle carry out the change oar action, its characterized in that, the device includes:
the acquisition module is configured to acquire operating parameters of the first variable pitch motor and the second variable pitch motor;
the processing module is configured to determine whether the acquired operating parameters of the first variable pitch motor and the second variable pitch motor are abnormal, and when the operating parameters are abnormal, the wind generating set is determined to have a blade clamping fault;
wherein the operating parameter comprises current, voltage and/or temperature;
the processing module is configured to acquire operating parameters of the first variable pitch motor and the second variable pitch motor within a preset time period; if the difference exists between the running parameter statistic value of the first variable pitch motor and the running parameter statistic value of the second variable pitch motor in the preset time period, determining that the running parameters of the first variable pitch motor and the second variable pitch motor are abnormal;
the processing module is configured to preferentially acquire current, and when the current is acquired, the voltage and the temperature are not acquired; when the current cannot be obtained, the voltage is preferentially obtained; when the voltage is obtained, the temperature is not obtained any more, and when the voltage cannot be obtained, the temperature is obtained.
8. A controller, characterized in that the controller comprises:
a processor;
a memory storing a computer program which, when executed by the processor, implements the method of identifying a wind turbine generator set blade sticking fault as claimed in any one of claims 1 to 6.
9. A computer storage medium, characterized in that it stores a computer program which, when executed by a processor, implements a method of identifying a wind turbine generator set blade-stuck fault according to any one of claims 1 to 6.
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| DK201070273A (en) * | 2010-06-18 | 2011-12-19 | Vestas Wind Sys As | Control method for a wind turbine |
| CN207178122U (en) * | 2017-08-25 | 2018-04-03 | 河北工业大学 | A kind of blower variable-pitch motor abnormality operational factor supervising device |
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| EP3597910A1 (en) * | 2018-07-17 | 2020-01-22 | General Electric Company | System and method for reducing loads during an idling or parked state of a wind turbine with a stuck rotor blade |
| EP3597905A1 (en) * | 2018-07-17 | 2020-01-22 | General Electric Company | System and method for detecting a pitch fault in a wind turbine via voltage, current, torque, or force monitoring |
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| DK201070273A (en) * | 2010-06-18 | 2011-12-19 | Vestas Wind Sys As | Control method for a wind turbine |
| CN207178122U (en) * | 2017-08-25 | 2018-04-03 | 河北工业大学 | A kind of blower variable-pitch motor abnormality operational factor supervising device |
| CN108708826A (en) * | 2018-05-16 | 2018-10-26 | 新疆金风科技股份有限公司 | Pitch motor progress control method and device, wind power generating set and storage medium |
| EP3597910A1 (en) * | 2018-07-17 | 2020-01-22 | General Electric Company | System and method for reducing loads during an idling or parked state of a wind turbine with a stuck rotor blade |
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