CN117489523A - Power lifting method and device of wind generating set and wind generating set - Google Patents
Power lifting method and device of wind generating set and wind generating set Download PDFInfo
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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
- 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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- 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
A power boosting method and device for a wind generating set and the wind generating set are disclosed. The power boosting method comprises the following steps: acquiring the operation parameters of the wind generating set and wind parameters of sites of the wind generating set, wherein the operation parameters and the wind parameters are related to loads born by the wind generating set; calculating load impact of the wind generating set based on the operation parameter and the wind parameter; and controlling the wind generating set to operate in a power boost mode in response to the calculated load impact meeting a preset condition.
Description
Technical Field
The present disclosure relates generally to the field of wind power generation, and more particularly, to a power method and apparatus of a wind power generator set, and a wind power generator set.
Background
Currently, in order to pursue power generation efficiency or maximize wind farm operation benefit, a plurality of different power control modes (e.g., power boost mode, rated operation mode, load reduction mode, etc.) may be used to control operation of the wind turbine generator set, so that the wind turbine generator set can flexibly generate power under different conditions. In the normal operating mode, the wind power plant may be operated, for example, at rated power, while in the power boost mode and the load reduction mode, the output power of the wind power plant is higher and lower than the rated power, respectively.
Disclosure of Invention
In order to keep the structured load below the required level, the operating interval of the power boost mode needs to be shifted to a higher wind speed range in order to reduce the time the wind park is operated in the power boost mode. Accordingly, embodiments of the present disclosure provide a power boost method and apparatus for a wind turbine generator system, and a wind turbine generator system, which are capable of achieving load condition-based power boost over a larger wind speed range than a rated wind speed, and disabling power boost in the event that the load condition is not satisfied (i.e., the load is impacted too high).
In one aspect, a power boost method of a wind turbine generator system is provided, the power boost method comprising: acquiring the operation parameters of the wind generating set and wind parameters of sites of the wind generating set, wherein the operation parameters and the wind parameters are related to loads born by the wind generating set; calculating load impact of the wind generating set based on the operation parameter and the wind parameter; and controlling the wind generating set to operate in a power boost mode in response to the calculated load impact meeting a preset condition.
Optionally, during operation of the wind power plant in a normal operation mode and during operation of the wind power plant in a power boost mode, the operating parameters of the wind power plant and the wind parameters of its site are obtained.
Optionally, in response to the calculated load impact not meeting a preset condition, controlling the wind power generator set to operate in a normal operation mode based on a rated power and/or a rated rotational speed of the wind power generator set.
Optionally, the operation parameters include tower top acceleration of the wind generating set and blade moments of three blades, and the wind parameters include turbulence intensity.
Optionally, the step of obtaining the operation parameters of the wind generating set and the wind parameters of the sites thereof comprises the following steps: and acquiring the tower top acceleration, the blade moment and the turbulence intensity, and filtering the acquired tower top acceleration, blade moment and turbulence intensity.
Optionally, the step of calculating the load impact of the wind park based on the operating parameter and the wind parameter comprises: determining a first impact component by asymmetrically filtering the tower top acceleration; determining a second impact component by asymmetrically filtering the blade moments of the three blades; determining a third impact component by asymmetrically filtering the turbulence intensity; and determining a weighted sum of the first impact component, the second impact component and the third impact component as the load impact.
Optionally, the step of determining the first impact component by asymmetrically filtering the tower top acceleration comprises: and calculating a first result corresponding to the asymmetrically filtered value of the overhead acceleration before the preset period according to the first time factor, and determining the maximum value of the first result and the absolute value of the current overhead acceleration as the current first impact component.
Optionally, the step of determining the second impact component by asymmetrically filtering the blade moments of the three blades comprises: and calculating a second result corresponding to the asymmetrically filtered value of the blade moments of the three blades before the preset period according to a second time factor, and determining the maximum value of the absolute value of the second result and the maximum value of the blade moments of the current three blades as a current second impact component.
Optionally, the step of determining the third impact component by asymmetrically filtering the turbulence intensity comprises: and calculating a third result corresponding to the asymmetrically filtered value of the turbulence intensity before the preset period according to a third time factor, and determining the third result and the maximum value of the current turbulence intensity as a current third impact component.
Optionally, in response to the calculated load impact being less than a preset threshold, determining that the calculated load impact meets a preset condition, wherein the preset threshold is less than a limit load of the wind power generator set.
Optionally, the step of controlling the wind power generator set to operate in the power boost mode in response to the calculated load impact meeting a preset condition comprises: determining at least two of a power reference value, a rotational speed reference value, and a torque reference value for power boost by a predetermined power boost relationship in response to the calculated load shock meeting a preset condition; and controlling the wind generating set to operate in a power boost mode based on at least two of the power reference value, the rotational speed reference value and the torque reference value.
Optionally, the step of controlling the wind power generator set to operate in the power boost mode based on at least two of the power reference value, the rotational speed reference value and the torque reference value comprises: and controlling the wind generating set to operate in a power lifting mode by adjusting the blade pitch angle of the wind generating set through a pitch mechanism or adjusting the generator torque through a converter based on at least two of the power reference value, the rotation speed reference value and the torque reference value.
In another aspect, there is provided a power boost device for a wind turbine generator system, the power boost device comprising: a parameter acquisition unit configured to: acquiring the operation parameters of the wind generating set and wind parameters of sites of the wind generating set, wherein the operation parameters and the wind parameters are related to loads born by the wind generating set; an impact calculation unit configured to: calculating load impact of the wind generating set based on the operation parameter and the wind parameter; a control unit configured to: and controlling the wind generating set to operate in a power boost mode in response to the calculated load impact meeting a preset condition.
In another aspect, a computer program product downloadable from a communication network and/or stored on a computer readable storage medium is provided, the computer program product comprising program code instructions for implementing the power boost method as described above.
In another aspect, a computer readable storage medium storing a computer program is provided, which when executed by a processor, implements the power boost method as described above.
In another aspect, there is provided a computing device comprising: a processor; and a memory storing a computer program which, when executed by the processor, implements the power boost method as described above.
In another aspect, a wind power plant is provided, comprising a computing device as described above.
According to the power lifting method and device of the wind generating set and the wind generating set, the power lifting strategy can be used in a larger wind speed range by disabling the power lifting under the condition that the load born by the wind generating set is too high, so that the generating efficiency of the wind generating set can be effectively improved, and the electric components of the wind generating set can be prevented from being damaged due to the too high load.
Drawings
The foregoing and other objects and features of embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings in which the embodiments are shown, in which:
FIG. 1 is a power graph illustrating an example of a power boost method of an existing wind turbine;
FIG. 2 is a power graph illustrating another example of a power boost method of an existing wind turbine;
FIG. 3 is a flow chart illustrating a power boost (power boost) method of a wind turbine generator set according to an embodiment of the present disclosure;
FIG. 4 is a flowchart illustrating a method of calculating a load impact of a wind turbine generator set according to an embodiment of the present disclosure;
FIG. 5 is a block diagram illustrating a power boost device of a wind turbine according to an embodiment of the present disclosure;
FIG. 6 is a control topology diagram illustrating a power boost device and a master controller of a wind turbine generator set according to an embodiment of the disclosure;
fig. 7 is a block diagram illustrating a controller according to an embodiment of the present disclosure. The controller may be implemented as a master controller of a wind turbine.
Detailed Description
The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the disclosure of the present application. For example, the order of operations described herein is merely an example and is not limited to those set forth herein, but may be altered as will be apparent after an understanding of the disclosure of the present application, except for operations that must occur in a particular order. Furthermore, descriptions of features known in the art may be omitted for clarity and conciseness.
The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and/or systems described herein, which will be apparent after an understanding of the present disclosure.
As used herein, the term "and/or" includes any one of the listed items associated as well as any combination of any two or more.
Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, first component, first region, first layer, or first portion referred to in the examples described herein may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples.
In the description, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" or "coupled to" the other element, it can be directly "on" the other element, be directly "connected to" or be "coupled to" the other element, or one or more other elements intervening elements may be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" or "directly coupled to" another element, there may be no other element intervening elements present.
The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, amounts, operations, components, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, amounts, operations, components, elements, and/or combinations thereof.
Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs after understanding this disclosure. Unless explicitly so defined herein, terms (such as those defined in a general dictionary) should be construed to have meanings consistent with their meanings in the context of the relevant art and the present disclosure, and should not be interpreted idealized or overly formal.
In addition, in the description of the examples, when it is considered that detailed descriptions of well-known related structures or functions will cause a ambiguous explanation of the present disclosure, such detailed descriptions will be omitted.
Fig. 1 is a power graph showing an example of a power boost (power boost) method of an existing wind turbine. Referring to fig. 1, after the wind turbine generator is started, its output power may be gradually increased to rated power P n At this time, the wind speed is v 1 . As wind speed increases further, the wind turbine may enter a power boost mode and operate in the power boost mode. In the power boost mode, the output power of the wind generating set mayEventually increasing to the power boost level P with increasing wind speed b At this time, the wind speed is v 2 . Thereafter, when the wind speed is maintained at [ v 2 ，v 3 ]When the interval is in, the output power of the wind generating set can be kept at the power boosting level P b . When the wind speed is increased to be higher than v 3 At this time, the output power of the wind generating set starts to rise from the power boost level P b Drop and when the wind speed reaches v 4 And when the wind generating set exits the power lifting mode, returning to the rated working mode. Thereafter, when the wind speed is maintained at [ v 4 ，v 5 ]When the interval is in, the output power of the wind generating set can be kept at rated power P n . When the wind speed is increased to be higher than v 5 When the wind generating set exits the rated power mode and its output power begins to run from rated power P n Descending. Thereafter, when the wind speed increases to v 6 When the wind power plant is to be operated at the highest wind speed. Once the wind speed increases above the maximum wind speed v 6 The wind generating set will feathering shut down.
Fig. 2 is a power graph illustrating another example of a power boosting method of an existing wind turbine generator system. Referring to fig. 2, after the wind turbine generator is started, its output power may be gradually increased to rated power P n At this time, the wind speed is v 8 . Subsequently, when the wind speed is maintained at [ v ] 8 ，v 9 ]When the interval is in, the wind generating set operates in the rated operation mode, and the output power of the wind generating set can be kept at the rated power P n . As wind speed increases further, the wind turbine may enter a power boost mode and operate in the power boost mode. In the power boosting mode, the output power of the wind generating set can be finally increased to a power boosting level P along with the increase of the wind speed b At this time, the wind speed is v 10 . Thereafter, when the wind speed is maintained at [ v 10 ，v 11 ]When the interval is in, the output power of the wind generating set can be kept at the power boosting level P b . When the wind speed is increased to be higher than v 11 At this time, the output power of the wind generating set starts to rise from the power boost level P b Drop and when the wind speed reaches v 12 In the time-course of which the first and second contact surfaces,and the wind generating set exits the power lifting mode and returns to the rated working mode. Thereafter, when the wind speed is maintained at [ v 12 ，v 13 ]When the interval is in, the output power of the wind generating set can be kept at rated power P n . When the wind speed is increased to be higher than v 13 When the wind generating set exits the rated power mode and its output power begins to run from rated power P n Descending. Thereafter, when the wind speed increases to v 14 When the wind power plant is to be operated at the highest wind speed. Once the wind speed increases above the maximum wind speed v 14 The wind generating set will feathering shut down.
The power boost approach described above requires a balance between power boost and structured load/heat to avoid excessive structured load/heat resulting in damage to electrical components of the wind turbine. However, even if the power boost method as shown in fig. 2 is used to shift the operating interval of the power boost mode away from the highest thrust range experienced by the wind turbine, the wind turbine will still experience significant structural loads during the course of the wind speed increase.
FIG. 3 is a flow chart illustrating a method of power boost of a wind turbine generator set according to an embodiment of the present disclosure. The power boost method of a wind turbine generator system according to embodiments of the present disclosure may be performed by a main controller of the wind turbine generator system and/or any dedicated controller provided in the wind turbine generator system.
Referring to fig. 3, in step S301, the operation parameters of the wind turbine and the wind parameters of its site (for example, the site may be at the hub of the wind turbine) are obtained. According to an embodiment of the present disclosure, both the acquired operating parameters and wind parameters are related to the load experienced by the wind turbine. For example, the operational parameters of the wind turbine may include tower top acceleration and three blade moments of the wind turbine, while the wind parameters of the turbine site of the wind turbine may include turbulence intensity. The operating parameters and wind parameters described above are examples only, but the disclosure is not limited thereto and any other operating parameters and wind parameters related to the load experienced by the wind turbine may be used. Here, the overhead acceleration may refer to the overhead acceleration in the vertical direction, the overhead acceleration in the horizontal direction, and may refer to both the overhead acceleration in the vertical direction and the overhead acceleration in the horizontal direction. Alternatively, the operating parameters of the wind power plant and the wind parameters of its site may be obtained during operation of the wind power plant in a normal operating mode and during operation of the wind power plant in a power boost mode. This means that the power boost method of a wind power plant according to embodiments of the present disclosure may be performed in both a normal operation mode (e.g., without limitation, a rated operation mode operating at rated power) and a power boost mode of the wind power plant.
In step S302, a load impact (load impact) of the wind park is calculated based on the acquired operation parameters and wind parameters. In other words, the load experienced by the wind power plant affected by the acquired operating parameters and wind parameters may be calculated based on the acquired operating parameters and wind parameters. As described above, the operating parameters may include tower top acceleration and blade moments of the three blades, while the wind parameters may include turbulence intensity. According to embodiments of the present disclosure, to reduce noise that may be generated when calculating load impact (load impact) of a wind turbine generator set, the acquired operating parameters and wind parameters (i.e., tower top acceleration, three-blade moments, turbulence intensity) may be filtered (e.g., without limitation, low pass filtering). Load impacts of the wind park are then calculated based on the filtered operating parameters and wind parameters.
In calculating the load impulse of the wind park, a first impulse component may be determined by asymmetrically filtering (asymmetric filtering) the tower top acceleration, a second impulse component may be determined by asymmetrically filtering the blade moments of the three blades, and a third impulse component may be determined by asymmetrically filtering the turbulence intensity. Then, a weighted sum of the first impact component, the second impact component, and the third impact component may be determined as the load impact.
FIG. 4 is a flowchart illustrating a method of calculating a load impact of a wind turbine generator set according to an embodiment of the present disclosure.
In step S401, a first result corresponding to the asymmetrically filtered value of the overhead acceleration before the preset period may be calculated according to the first time factor, and a maximum value of the first result and the absolute value of the current overhead acceleration may be determined as the current first impact component. Specifically, the first impact component may be calculated according to the following equation (1).
h(a tt )[n]＝max(α 1 ·h(a tt )[n-1],abs(a tt [n])) (1)
In equation (1), a tt Represents tower top acceleration, h () represents an asymmetric filter function, h (a tt )[n]An asymmetrically filtered value representing the tower top acceleration at the nth time (i.e., the first impact component at the nth time), α 1 Represents a first time factor, h (a tt )[n-1]An asymmetrically filtered value representing the tower top acceleration at the n-1 th time, abs (a tt [n]) The absolute value of the tower top acceleration at the nth time is shown. According to an embodiment of the present disclosure, the asymmetric filtering may be a finite length unit impulse response (FIR) based asymmetric filtering, and a specific form thereof may be set by one skilled in the art according to actual needs, which the present disclosure does not limit in any way. First time factor alpha 1 May be greater than 0 and less than 1. Typically, a first time factor α 1 May be a number less than 1 but close to 1. Calculating the first impact component by equation (1) may show that the first impact component may rise rapidly with an increase in the overhead acceleration, but its falling speed is very slow.
In step S402, a second result corresponding to the asymmetrically filtered values of the blade moments of the three blades before the preset period may be calculated according to the second time factor, and a maximum value of the absolute values of the second result and the maximum value of the blade moments of the current three blades may be determined as the current second impact component. Specifically, the second impact component may be calculated according to the following equation (2).
i(M b )[n]＝max(α 2 ·i(M b )[n-1],max(abs(M b [n]))) (2)
In equation (2), M b Representing the blade moments of three blades, i () represents an asymmetric filter function,i(M b )[n]an asymmetrically filtered value (i.e., a second impact component at the nth time), α, representing a blade moment of three blades at the nth time (illustratively, a vector constituted by the blade moments of three blades) 2 Represents a first time factor, i (M b )[n-1]The value max (abs (M) b [n]) The absolute value of the maximum value of the blade moments of the three blades at the nth time. The asymmetric filter functions i () and h () may be asymmetric filter functions of the same form, but filter coefficients of the two may be different from each other. Second time factor alpha 2 May be greater than 0 and less than 1. Typically, the second time factor α 2 May be a number less than 1 but close to 1. First time factor alpha 1 And a second time factor alpha 2 May be the same or different from each other. Calculating the second impact component by equation (2) may show that the second impact component may rise rapidly with increasing maximum of the blade moments of the three blades, but its falling speed is very slow.
In step S403, a third result corresponding to the asymmetrically filtered value of the turbulence intensity before the preset period is calculated according to the third time factor, and the third result and the maximum value of the current turbulence intensity are determined as the current third impact component. Specifically, the third impact component may be calculated according to the following equation (3).
j(t L )[n]＝max(α 3 ·j(t L )[n-1],t L [n]) (3)
In equation (3), t L Represents turbulence intensity, j () represents an asymmetric filter function, j (t L )[n]An asymmetrically filtered value representing the turbulence intensity at the nth time (i.e., the third impact component at the nth time), α 3 Represents a third time factor, j (t L )[n-1]An asymmetrically filtered value, t, representing the turbulence intensity at time n-1 L [n]The turbulence intensity at the nth time is shown. The asymmetric filter functions i (), h (), j () may be asymmetric filter functions of the same form, but their filter coefficients may be different from each other. Third time factor alpha 3 May be greater than 0 and less than 1. Typically, at the third timeFactor alpha 3 May be a number less than 1 but close to 1. First time factor alpha 1 Second time factor alpha 2 Third time factor alpha 3 May be the same or different from each other. Calculating the third impact component by equation (3) may show that the third impact component may rise rapidly with increasing turbulence intensity, but its falling rate is very slow.
After the first, second, and third impact components are calculated by equations (1), (2), and (3), in step S204, a weighted sum of the first, second, and third impact components may be calculated as the load impact Z by the following equation (4).
Z＝k h ·h(a tt )+k i ·i(M b )+k j ·j(t L ) (4)
In equation (4), h (a tt )、i(M b )、j(t L ) Respectively representing a first impact component, a second impact component and a third impact component, k h 、k i 、k j The weights of the first impact component, the second impact component and the third impact component are represented, respectively. According to an embodiment of the present disclosure, weight k h 、k i 、k j Any setting may be made as long as the following conditions are satisfied: weight k h Can be set so that k h ·h(a tt ) Take a value between 0 and 1, weight k i Can be set so that k i ·i(M b ) Take a value between 0 and 1, weight k j Can be set so that k j ·j(t L ) Take a value between 0 and 1.
According to an embodiment of the present disclosure, the order of steps S401, S402, S403 is only an example, and the above steps may be performed simultaneously or may be performed in an order different from that described in the present embodiment.
Referring back to fig. 3, in step S303, the wind turbine generator set is controlled to operate in a power boost mode in response to the calculated load impact meeting a preset condition.
According to an embodiment of the present disclosure, when the calculated load shock satisfies a preset condition, at least two of a power reference value, a rotation speed reference value, and a torque reference value for power boost may be first determined through a predetermined power boost relationship. Here, the power boost relationship may be a power boost curve as shown in fig. 2, or other forms of power mapping relationships. For example, the power boost relationship may reflect a correspondence between wind speed or pitch angle and power, rotational speed, and/or torque reference values. Alternatively, at least two of the power reference value, the rotational speed reference value, and the torque reference value for power boost may be determined by a power boost relationship based on an average wind speed or an average pitch angle over a predetermined period of time. Further, in response to the calculated load impact being less than the preset threshold, it may be determined that the calculated load impact satisfies the preset condition. The present disclosure is not particularly limited as long as the preset threshold value may be smaller than the limit load of the wind turbine generator set.
Subsequently, the wind turbine may be controlled to operate in a power boost mode based on at least two of the determined power reference value, rotational speed reference value, and torque reference value. Specifically, the wind turbine may be controlled to operate in a power boost mode by adjusting a blade pitch angle of the wind turbine via a pitch mechanism or by adjusting a generator torque via a converter based on at least two of a power reference value, a rotational speed reference value, and a torque reference value. For example, the wind turbine may be controlled to operate in a power boost mode by adjusting a blade pitch angle of the wind turbine via a pitch mechanism based on the power reference value and the rotational speed value. For another example, the generator torque of the wind turbine may be adjusted by the converter based on the power reference value and the torque reference value to control the wind turbine to operate in the power boost mode. Note that the above description is only an example, and that the wind turbine may also be controlled to operate in the power boost mode by adjusting the blade pitch angle or the generator torque of the wind turbine based on other combinations of power reference values, rotational speed reference values and torque reference values.
However, in response to the calculated load impact not meeting the preset condition, the wind turbine may be controlled to operate in a normal operating mode based on the rated power and/or the rated rotational speed of the wind turbine. For example, when the calculated load impact is greater than the above-mentioned preset threshold, the wind power plant may be controlled to operate in a normal operation mode. That is, when the calculated load impact is greater than the above-mentioned preset threshold, the power boost mode of the wind power plant may be disabled, while the normal operation mode of the wind power plant is enabled.
According to the power lifting method of the wind generating set, the power lifting strategy can be used in a larger wind speed range by disabling the power lifting in the case that the load born by the wind generating set is too high. Therefore, the power generation efficiency of the wind generating set can be improved, and the electric components of the wind generating set can be protected from being damaged due to excessive load.
Fig. 5 is a block diagram illustrating a power boost device of a wind turbine according to an embodiment of the present disclosure. The power boost device of a wind power plant according to embodiments of the present disclosure may be (or be part of) a main controller of the wind power plant and/or may be any dedicated controller provided in the wind power plant.
Referring to fig. 5, a power boost device 500 of a wind generating set according to an embodiment of the present disclosure includes a parameter acquisition unit 501, an impact calculation unit 502, and a control unit 503.
The parameter obtaining unit 501 may obtain an operation parameter of the wind generating set and a wind parameter of a site thereof. As mentioned above, both the operating parameters and the wind parameters are related to the load to which the wind power plant is subjected. For example, the operating parameters may include tower top acceleration of the wind turbine and blade moments of the three blades, and the wind parameters include turbulence intensity. Alternatively, the parameter obtaining unit 501 may obtain the operation parameters of the wind turbine and the wind parameters of its site during operation of the wind turbine in the normal operation mode and during operation of the wind turbine in the power boost mode. Further, the parameter acquisition unit 501 may acquire the tower top acceleration, the blade moment, and the turbulence intensity, and filter the acquired tower top acceleration, blade moment, and turbulence intensity.
The impact calculation unit 502 may calculate a load impact of the wind park based on the operation parameters and the wind parameters. Specifically, the impact calculation unit 502 may determine the first impact component by asymmetrically filtering the tower top acceleration, the second impact component by asymmetrically filtering the blade moments of the three blades, the third impact component by asymmetrically filtering the turbulence intensity, and the weighted sum of the first impact component, the second impact component, and the third impact component as the load impact. Further, the impact calculation unit 502 may calculate a first result corresponding to the asymmetrically filtered value of the overhead acceleration before the preset period according to the first time factor, and determine a maximum value of the first result and the absolute value of the current overhead acceleration as the current first impact component. The impact calculation unit 502 may calculate a second result corresponding to the asymmetrically filtered value of the blade moments of the three blades before the preset period according to the second time factor, and determine a maximum value of the absolute value of the maximum value of the blade moments of the second result and the current three blades as the current second impact component. The impact calculation unit 502 may calculate a third result corresponding to the asymmetrically filtered value of the turbulence intensity before the preset period according to the third time factor, and determine the third result and the maximum value of the current turbulence intensity as the current third impact component. For example, the impact calculation unit 502 may calculate the first impact component, the second impact component, and the third impact component by the above equation (1), equation (2), and equation (3).
The control unit 503 may control the wind power generation set to operate in the power boost mode in response to the calculated load impact satisfying a preset condition. For example, when the calculated load shock is smaller than the preset threshold value, the control unit 503 may determine that the calculated load shock satisfies the preset condition. Here, the preset threshold value is smaller than the limit load of the wind power plant. More specifically, the control unit 503 may first determine at least two of a power reference value, a rotation speed reference value, and a torque reference value for power boost by a predetermined power boost relationship in response to the calculated load shock satisfying a preset condition. Alternatively, the control unit 503 may determine at least two of the power reference value, the rotational speed reference value, and the torque reference value for power boost through a power boost relationship based on an average wind speed or an average pitch angle over a predetermined period of time.
Further, the control unit 503 may control the wind turbine generator set to operate in the power boost mode based on at least two of the power reference value, the rotational speed reference value and the torque reference value. For example, the control unit 503 may control the wind turbine to operate in the power boost mode by adjusting a blade pitch angle of the wind turbine via the pitch mechanism or by adjusting a generator torque via the converter based on at least two of the power reference value, the rotational speed reference value and the torque reference value. On the other hand, in response to the calculated load impact not meeting the preset condition, the control unit 503 may control the power generator set to operate in the normal operation mode based on the rated power and/or the rated rotational speed of the wind generator set.
Fig. 6 is a control topology diagram illustrating a power boost device and a main controller of a wind turbine generator set according to an embodiment of the present disclosure. In fig. 6, a power boost device 610 is shown as part of the main controller 600. However, the present disclosure is not limited thereto, and the power boost device 610 may be the main controller of the wind turbine generator set itself, and/or may be any dedicated controller provided in the wind turbine generator set.
Referring to fig. 6, a main controller 600 of a wind turbine may include a power boost device 610 and a processor 620 (i.e., an existing main controller). The processor 620 may include, but is not limited to, a Central Processing Unit (CPU), a Digital Signal Processor (DSP), a microcomputer, a Field Programmable Gate Array (FPGA), a system on a chip (SoC), a microprocessor, an Application Specific Integrated Circuit (ASIC), etc.
The power boost device 610 may obtain from the wind generator 650 the operating parameters and wind parameters f required for calculating the load impact of the wind park. As described above, the operating parameters and wind parameters f may include tower top acceleration, blade moments of three blades, and turbulence intensity. Alternatively, the operating parameters and wind parameters f may be filtered operating parameters and wind parameters. On the other hand, the power boost device 610 may also obtain a parameter e from the wind generator 650 required for determining the power reference value and the rotational speed reference value by the power boost relationship, e.g. the parameter e may comprise an average of wind speeds or an average of pitch angles over a predetermined period of time.
The power boost device 610 may calculate a power reference value a and a rotational speed reference value b for power boost and provide the power reference value a and the rotational speed reference value b to the processor 620 so that the processor 620 performs a power boost operation. Here, one of the power reference value a and the rotation speed reference value b may be replaced with a torque reference value.
Processor 620 may output control signals c for controlling operation of wind turbine 650, which may include, for example, blade pitch angle or generator torque. On the other hand, process 620 may obtain various operating parameters and wind parameters d from wind turbine 650 to monitor an operating state of wind turbine 650. As described above, the various operating parameters and wind parameters d may include generator speed, pitch angle, tower top acceleration, blade moments of the three blades, wind speed, and the like.
Fig. 7 is a block diagram illustrating a controller according to an embodiment of the present disclosure. The controller may be implemented as a master controller of a wind turbine.
Referring to fig. 7, a controller 700 according to an embodiment of the present disclosure includes a processor 710 and a memory 720. As described above, the processor 710 may include, but is not limited to, a Central Processing Unit (CPU), a Digital Signal Processor (DSP), a microcomputer, a Field Programmable Gate Array (FPGA), a system on a chip (SoC), a microprocessor, an Application Specific Integrated Circuit (ASIC), and the like. Memory 720 may store computer programs to be executed by processor 710. Memory 720 may include high-speed random access memory and/or a non-volatile computer-readable storage medium. When the processor 710 executes the computer program stored in the memory 720, the power boost method of the wind turbine generator set as described above may be implemented.
Alternatively, the controller 700 may communicate with other various components in the wind park in a wired or wireless communication manner, and may also communicate with other devices in the wind park (e.g., a master controller of the wind park) in a wired or wireless communication manner. In addition, the controller 700 may communicate with devices external to the wind farm in a wired or wireless communication.
The power boost method of a wind turbine generator system according to embodiments of the present disclosure may be written as a computer program and stored on a computer readable storage medium. The power boost method of a wind park as described above may be implemented when said computer program is executed by a processor. Examples of the computer readable storage medium include: read-only memory (ROM), random-access programmable read-only memory (PROM), electrically erasable programmable read-only memory (EEPROM), random-access memory (RAM), dynamic random-access memory (DRAM), static random-access memory (SRAM), flash memory, nonvolatile memory, CD-ROM, CD-R, CD + R, CD-RW, CD+RW, DVD-ROM, DVD-R, DVD + R, DVD-RW, DVD+RW, DVD-RAM, BD-ROM, BD-R, BD-R LTH, BD-RE, blu-ray or optical disk storage, hard Disk Drives (HDD), solid State Disks (SSD), card memory (such as multimedia cards, secure Digital (SD) cards or ultra-fast digital (XD) cards), magnetic tape, floppy disks, magneto-optical data storage, hard disks, solid state disks, and any other means configured to store computer programs and any associated data, data files and data structures in a non-transitory manner and to provide the computer programs and any associated data, data files and data structures to a processor or computer to enable the processor or computer to execute the programs. In one example, the computer program and any associated data, data files, and data structures are distributed across networked computer systems such that the computer program and any associated data, data files, and data structures are stored, accessed, and executed in a distributed manner by one or more processors or computers.
According to embodiments of the present disclosure, a computer program product may also be provided. The computer program product may be downloaded from a communication network and/or stored on a computer readable storage medium, and the computer program product may comprise program code instructions for implementing a power boost method of a wind park as described above.
According to an embodiment of the present disclosure, there may also be provided a computer-readable storage medium storing a computer program. The power boost method of a wind park as described above may be implemented when said computer program is executed by a processor.
According to the power lifting method and device of the wind generating set and the wind generating set, the power lifting strategy can be used in a larger wind speed range by disabling the power lifting under the condition that the load born by the wind generating set is too high, so that the generating efficiency of the wind generating set can be effectively improved, and the electric components of the wind generating set can be prevented from being damaged due to the too high load.
Although a few embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.
Claims (16)
1. A method of power boost for a wind turbine generator system, the method comprising:
acquiring the operation parameters of the wind generating set and wind parameters of sites of the wind generating set, wherein the operation parameters and the wind parameters are related to loads born by the wind generating set;
calculating load impact of the wind generating set based on the operation parameter and the wind parameter;
and controlling the wind generating set to operate in a power boost mode in response to the calculated load impact meeting a preset condition.
2. The power boost method of claim 1, wherein the operating parameters of the wind turbine generator set and the wind parameters at its site are obtained during operation of the wind turbine generator set in a normal operating mode and during operation of the wind turbine generator set in a power boost mode.
3. A power boost method according to claim 1 or 2, characterized in that the wind power plant is controlled to operate in a normal operation mode based on the rated power and/or rated rotational speed of the wind power plant in response to the calculated load impact not meeting a preset condition.
4. The power boost method of claim 1, wherein said operating parameters include tower top acceleration of said wind generating set and blade moments of three blades, said wind parameters including turbulence intensity.
5. The power boost method of claim 4, wherein the step of obtaining the operating parameters of the wind turbine and wind parameters of its site includes:
and acquiring the tower top acceleration, the blade moment and the turbulence intensity, and filtering the acquired tower top acceleration, blade moment and turbulence intensity.
6. The power boost method of claim 4, wherein calculating a load impact of the wind turbine generator set based on the operating parameter and the wind parameter comprises:
determining a first impact component by asymmetrically filtering the tower top acceleration;
determining a second impact component by asymmetrically filtering the blade moments of the three blades;
determining a third impact component by asymmetrically filtering the turbulence intensity;
and determining a weighted sum of the first impact component, the second impact component and the third impact component as the load impact.
7. The power boost method of claim 5, wherein determining the first impact component by asymmetrically filtering the tower top acceleration includes:
and calculating a first result corresponding to the asymmetrically filtered value of the overhead acceleration before the preset period according to the first time factor, and determining the maximum value of the first result and the absolute value of the current overhead acceleration as the current first impact component.
8. The power boost method of claim 5, wherein determining the second impulse component by asymmetrically filtering blade moments of the three blades includes:
and calculating a second result corresponding to the asymmetrically filtered value of the blade moments of the three blades before the preset period according to a second time factor, and determining the maximum value of the absolute value of the second result and the maximum value of the blade moments of the current three blades as a current second impact component.
9. The power boost method of claim 5, wherein determining a third impingement component by asymmetrically filtering said turbulence intensity comprises:
and calculating a third result corresponding to the asymmetrically filtered value of the turbulence intensity before the preset period according to a third time factor, and determining the third result and the maximum value of the current turbulence intensity as a current third impact component.
10. The power boost method of claim 1, wherein in response to the calculated load shock being less than a preset threshold, determining that the calculated load shock meets a preset condition,
wherein the preset threshold value is smaller than the limit load of the wind generating set.
11. The power boost method of claim 1, wherein the step of controlling the wind turbine to operate in the power boost mode in response to the calculated load shock meeting a preset condition comprises:
determining at least two of a power reference value, a rotational speed reference value, and a torque reference value for power boost by a predetermined power boost relationship in response to the calculated load shock meeting a preset condition;
and controlling the wind generating set to operate in a power boost mode based on at least two of the power reference value, the rotational speed reference value and the torque reference value.
12. The power boost method of claim 10, wherein controlling the wind power generator set to operate in a power boost mode based on at least two of the power reference value, a rotational speed reference value, and a torque reference value comprises:
and controlling the wind generating set to operate in a power lifting mode by adjusting the blade pitch angle of the wind generating set through a pitch mechanism or adjusting the generator torque through a converter based on at least two of the power reference value, the rotation speed reference value and the torque reference value.
13. A power boost device for a wind turbine generator system, the power boost device comprising:
a parameter acquisition unit configured to: acquiring the operation parameters of the wind generating set and wind parameters of sites of the wind generating set, wherein the operation parameters and the wind parameters are related to loads born by the wind generating set;
an impact calculation unit configured to: calculating load impact of the wind generating set based on the operation parameter and the wind parameter;
a control unit configured to: and controlling the wind generating set to operate in a power boost mode in response to the calculated load impact meeting a preset condition.
14. Computer program product downloadable from a communication network and/or stored on a computer-readable storage medium, characterized in that it comprises program code instructions for implementing the power boost method according to any one of claims 1 to 12.
15. A computing device, the computing device comprising:
a processor; and
memory storing a computer program which, when executed by a processor, implements the power boost method according to any one of claims 1 to 12.
16. A wind power plant, characterized in that it comprises a computing device according to claim 15.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210876202.7A CN117489523A (en) | 2022-07-25 | 2022-07-25 | Power lifting method and device of wind generating set and wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210876202.7A CN117489523A (en) | 2022-07-25 | 2022-07-25 | Power lifting method and device of wind generating set and wind generating set |
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| CN117489523A true CN117489523A (en) | 2024-02-02 |
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| CN202210876202.7A Pending CN117489523A (en) | 2022-07-25 | 2022-07-25 | Power lifting method and device of wind generating set and wind generating set |
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| CN (1) | CN117489523A (en) |
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