CN114962143B - Double wind wheel wind generating set and control method and device thereof - Google Patents
Double wind wheel wind generating set and control method and device thereof Download PDFInfo
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- CN114962143B CN114962143B CN202210676951.5A CN202210676951A CN114962143B CN 114962143 B CN114962143 B CN 114962143B CN 202210676951 A CN202210676951 A CN 202210676951A CN 114962143 B CN114962143 B CN 114962143B
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Classifications
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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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/02—Wind motors with rotation axis substantially parallel to the air flow entering the rotor having a plurality of rotors
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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
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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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
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/304—Spool rotational speed
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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
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
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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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- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention provides a double-wind-wheel wind generating set and a control method and a device thereof, relating to the technical field of wind power generation, wherein the method comprises the following steps: acquiring a wind wheel rotating speed combination of the double wind wheel wind generating set at the current wind speed to search an ideal working point corresponding to the wind wheel rotating speed combination; calculating electromagnetic torque compensation values of the first wind wheel and the second wind wheel based on the ideal working point; acquiring rotating speed and torque curves of the first wind wheel and the second wind wheel, and determining target electromagnetic torques of the first wind wheel and the second wind wheel; according to the electromagnetic torque compensation value and the target electromagnetic torque, electromagnetic torque command signals of the first wind wheel and the second wind wheel are calculated to control the first wind wheel and/or the second wind wheel.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a double-wind-wheel wind generating set and a control method and device thereof.
Background
At present, the mainstream wind generating sets are all single-wind-wheel wind generating sets, however, the efficiency of the single-wind-wheel wind generating sets is lower, so that the high-efficiency wind energy conversion wind generating sets are required. Although the double-wind-wheel wind generating set has high-efficiency wind energy capturing capability, the control modes of the double-wind-wheel wind generating set are less, and effective control is difficult to carry out.
Disclosure of Invention
In view of the above, the present invention aims to provide a double wind turbine generator system, and a control method and a device thereof, so as to alleviate the above technical problems.
In a first aspect, an embodiment of the present invention provides a control method of a double wind turbine generator system, where the double wind turbine generator system is a tandem double wind turbine generator system, and includes a first wind turbine and a second wind turbine, and the method includes: acquiring a wind wheel rotating speed combination of the double wind wheel wind generating set at the current wind speed, wherein the wind wheel rotating speed combination comprises the actual rotating speed of the first wind wheel and the actual rotating speed of the second wind wheel at the current wind speed; searching an ideal working point corresponding to the wind wheel rotating speed combination on a rotating speed combination curve of the pre-stored double wind wheel wind generating set; respectively calculating electromagnetic torque compensation values of the first wind wheel and the second wind wheel based on the ideal working point; acquiring prestored rotating speed torque curves corresponding to the first wind wheel and the second wind wheel respectively, and respectively determining target electromagnetic torques of the first wind wheel and the second wind wheel at the current wind speed based on the rotating speed torque curves; and respectively calculating electromagnetic torque command signals of the first wind wheel and the second wind wheel according to the electromagnetic torque compensation value and the target electromagnetic torque so as to control the first wind wheel and/or the second wind wheel through the electromagnetic torque command signals.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the method further includes: acquiring pre-stored pneumatic data of the double wind wheel wind generating set; determining the rotating speed of the first wind wheel and the rotating speed of the second wind wheel corresponding to the maximum value of the output power of the whole machine of the double wind wheel wind generating set under the preset wind speed based on the pneumatic data, and generating a rotating speed combination comprising the rotating speed of the first wind wheel and the rotating speed of the second wind wheel; and generating a rotating speed combination curve in a pre-established rotating speed coordinate system according to the rotating speed combination at a plurality of preset wind speeds, wherein the abscissa and the ordinate of the rotating speed coordinate system are rotating speed values of the first wind wheel and the second wind wheel respectively.
With reference to the first aspect and the first possible implementation manner of the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, where the step of searching, on a prestored rotational speed combination curve of the double wind turbine generator set, an ideal operating point corresponding to the wind turbine rotational speed combination includes: searching a correlation point of the wind wheel rotating speed combination on the rotating speed combination curve, wherein the correlation point comprises one of the following components: the nearest distance point from the wind wheel rotating speed combination on the rotating speed combination curve, the point at which the vertical direction of the wind wheel rotating speed combination intersects with the rotating speed combination curve, the point at which the horizontal direction of the wind wheel rotating speed combination intersects with the rotating speed combination curve, or any point from the wind wheel rotating speed combination within a preset range on the rotating speed combination curve; and determining the searched association points as ideal working points corresponding to the wind wheel rotating speed combinations, wherein the ideal working points comprise the ideal rotating speed of the first wind wheel and the ideal rotating speed of the second wind wheel.
With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, where the step of calculating electromagnetic torque compensation values of the first wind wheel and the second wind wheel based on the ideal operating point respectively includes: extracting the actual rotating speed of the first wind wheel and the actual rotating speed of the second wind wheel included in the wind wheel rotating speed combination; calculating a rotational speed difference value of the first wind wheel according to the actual rotational speed of the first wind wheel and the ideal rotational speed of the first wind wheel included in the ideal working point; converting the rotating speed difference value of the first wind wheel into an electromagnetic torque compensation value corresponding to the first wind wheel according to a pre-stored weight coefficient of the first wind wheel; and calculating a rotational speed difference of the second wind wheel according to the actual rotational speed of the second wind wheel and the ideal rotational speed of the second wind wheel included in the ideal operating point; and converting the rotating speed difference value of the second wind wheel into an electromagnetic torque compensation value corresponding to the second wind wheel according to a pre-stored weight coefficient of the second wind wheel.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the method further includes: respectively determining the output power of the first wind wheel and the output power of the second wind wheel at a plurality of preset wind speeds according to the pneumatic data and the rotation speed combinations at the plurality of preset wind speeds; generating a rotating speed torque curve of the first wind wheel according to the output power of the first wind wheel and the rotating speed of the first wind wheel contained in the rotating speed combination; and generating a rotational speed torque curve of the second wind wheel according to the output power of the second wind wheel and the rotational speed of the second wind wheel contained in the rotational speed combination.
With reference to the first aspect, the embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the step of calculating electromagnetic torque command signals of the first wind wheel and the second wind wheel according to the electromagnetic torque compensation value and the target electromagnetic torque respectively includes: performing superposition calculation on the electromagnetic torque compensation value of the first wind wheel and the target electromagnetic torque of the first wind wheel to obtain an electromagnetic torque command signal of the first wind wheel; and performing superposition calculation on the electromagnetic torque compensation value of the second wind wheel and the target electromagnetic torque of the second wind wheel to obtain an electromagnetic torque command signal of the second wind wheel.
In a second aspect, an embodiment of the present invention further provides a control device for a double wind turbine, where the double wind turbine is a tandem double wind turbine, and includes a first wind turbine and a second wind turbine, and the device includes: the first acquisition module is used for acquiring a wind wheel rotating speed combination of the double wind wheel wind generating set at the current wind speed, wherein the wind wheel rotating speed combination comprises the actual rotating speed of the first wind wheel and the actual rotating speed of the second wind wheel at the current wind speed; the searching module is used for searching an ideal working point corresponding to the wind wheel rotating speed combination on a rotating speed combination curve of the pre-stored double wind wheel wind generating set; the first calculation module is used for calculating electromagnetic torque compensation values of the first wind wheel and the second wind wheel respectively based on the ideal working point; the second acquisition module is used for acquiring prestored rotating speed torque curves corresponding to the first wind wheel and the second wind wheel respectively, and determining target electromagnetic torques of the first wind wheel and the second wind wheel under the current wind speed respectively based on the rotating speed torque curves; and the second calculation module is used for calculating electromagnetic torque command signals of the first wind wheel and the second wind wheel according to the electromagnetic torque compensation value and the target electromagnetic torque respectively so as to control the first wind wheel and/or the second wind wheel through the electromagnetic torque command signals.
In a third aspect, an embodiment of the present invention further provides a double wind turbine generator, where a controller of the double wind turbine generator is configured with the two-stage operation control device of the double wind turbine generator according to the second aspect.
In a fourth aspect, an embodiment of the present invention further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor executes the computer program to implement the steps of the method described in the first aspect.
In a fifth aspect, embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, which when being executed by a processor performs the steps of the method according to the first aspect.
The embodiment of the invention has the following beneficial effects:
according to the double-wind-wheel wind generating set and the control method and device thereof, provided by the embodiment of the invention, the wind wheel rotating speed combination of the double-wind-wheel wind generating set at the current wind speed can be obtained, an ideal working point corresponding to the wind wheel rotating speed combination is searched on a rotating speed combination curve of the pre-stored double-wind-wheel wind generating set, and the electromagnetic torque compensation values of the first wind wheel and the second wind wheel are respectively calculated based on the ideal working point; in addition, a prestored rotating speed torque curve corresponding to the first wind wheel and the second wind wheel respectively can be obtained, and the target electromagnetic torque of the first wind wheel and the target electromagnetic torque of the second wind wheel at the current wind speed are respectively determined based on the rotating speed torque curve; and then calculate the electromagnetic torque command signal of the first wind wheel and second wind wheel respectively according to the electromagnetic torque compensation value and goal electromagnetic torque, in order to control the first wind wheel and/or second wind wheel through the electromagnetic torque command signal, the whole control process has utilized the wind wheel rotational speed combination of the double wind wheel wind-driven generator, can guarantee the double wind wheel wind-driven generator is stable in the optimal running state under different wind speeds, and then instruct the running control of the double wind wheel wind-driven generator, give full play to the wind energy conversion ability of the double wind wheel wind-driven generator.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a control method of a double wind wheel wind generating set provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a rotational speed combination curve according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a rotational speed and torque curve of a first wind wheel according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of a rotational speed and torque curve of a second wind wheel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an operation strategy of a double wind turbine generator set according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a control device of a double wind wheel wind generating set according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, the mainstream wind turbine generator systems are all single wind wheel wind turbine generator systems, and because of evaluating the internet surfing pressure, high-efficiency wind energy conversion wind turbine generator systems are urgently needed to be researched, and the double wind wheel wind turbine generator systems have high-efficiency wind energy capturing capability, but the operation control method is in a blank state.
For the convenience of understanding the present embodiment, first, a control method of a double wind wheel wind turbine generator set disclosed in the embodiment of the present invention is described in detail.
In a possible implementation manner, the embodiment of the present invention provides a control method of a double wind wheel wind generating set, specifically, the double wind wheel wind generating set in the embodiment of the present invention is a tandem double wind wheel wind generating set, including a first wind wheel and a second wind wheel, fig. 1 shows a flowchart of a control method of a double wind wheel wind generating set, and the method includes the following steps:
step S102, obtaining a wind wheel rotating speed combination of the double wind wheel wind generating set at the current wind speed;
the wind wheel rotating speed combination comprises the actual rotating speed of the first wind wheel and the actual rotating speed of the second wind wheel at the current wind speed;
in practical use, the first wind wheel and the second wind wheel of the double wind wheel wind generating set can be generally referred to as a front wind wheel and a rear wind wheel, and the control method of the double wind wheel wind generating set provided by the embodiment of the invention refers to operation control of the tandem double wind wheel (co-rotating or counter-rotating) wind generating set of the front wind wheel and the rear wind wheel under the open airflow condition.
Step S104, searching an ideal working point corresponding to the wind wheel rotation speed combination on a rotation speed combination curve of a pre-stored double wind wheel wind generating set;
step S106, electromagnetic torque compensation values of the first wind wheel and the second wind wheel are calculated based on ideal working points respectively;
in particular, the rotation speed combination curve in the embodiment of the invention is a pre-planned optimal rotation speed combination curve of the front wind wheel and the rear wind wheel at different wind speeds, and is used for describing the rotation speed of the front wind wheel and the rotation speed of the rear wind wheel when the output power of the whole double wind wheel wind generating set is maximum at a certain wind speed, so that the rotation speed combination of the wind wheels in the embodiment of the invention actually comprises two elements, namely the actual rotation speed of the first wind wheel and the actual rotation speed of the second wind wheel at a certain wind speed. In step S104, the ideal operating point found on the rotational speed combination curve based on the rotational speed combination of the wind wheels is also a rotational speed combination including the rotational speed of the first wind wheel and the rotational speed of the second wind wheel, but is only a rotational speed combination in an ideal case. Therefore, in step S106, the electromagnetic torque compensation value may be calculated from the rotational speed and the corresponding relation between the rotational speed and the torque included in the ideal operating point.
Step S108, acquiring prestored rotating speed and torque curves respectively corresponding to the first wind wheel and the second wind wheel, and respectively determining target electromagnetic torques of the first wind wheel and the second wind wheel at the current wind speed based on the rotating speed and torque curves;
step S110, electromagnetic torque command signals of the first wind wheel and the second wind wheel are respectively calculated according to the electromagnetic torque compensation value and the target electromagnetic torque, so that the first wind wheel and/or the second wind wheel are controlled through the electromagnetic torque command signals.
In particular, the rotation speed and torque curve is also pre-established for the double-wind-wheel wind generating set, and in general, when the rotation speed combination curve is generated, the situations of the rotation speed of the front wind wheel and the rotation speed of the rear wind wheel when the output power of the whole wind turbine is maximum are considered, at this time, the respective output powers of the front wind wheel and the rear wind wheel at each wind speed can be obtained, and the respective rotation speed and torque curves can be obtained through the respective output powers and rotation speeds of the front wind wheel and the rear wind wheel.
In addition, as the control method of the double wind wheel wind generating set provided by the embodiment of the invention, the situation when the output power of the whole machine is maximum is considered by the rotating speed combination curve, and the respective running states of the front wind wheel and the rear wind wheel are described by the rotating speed torque curve, the control method of the double wind wheel wind generating set provided by the embodiment of the invention is actually a method for controlling the two-stage running of the double wind wheel wind generating set, and the optimal running state of the whole machine in each wind speed in the running wind speed range is utilized as the target of a first-stage control strategy; the running states of the front wind wheel and the rear wind wheel in the optimal running state of the whole machine are used as targets of a second-stage control strategy, so that the double-wind-wheel wind generating set can realize that the front wind wheel and the rear wind wheel can run in respective target states when the whole machine runs in the overall output optimal state.
Therefore, the control method of the double-wind-wheel wind generating set provided by the embodiment of the invention can obtain the wind wheel rotating speed combination of the double-wind-wheel wind generating set at the current wind speed, search the ideal working point corresponding to the wind wheel rotating speed combination on the rotating speed combination curve of the pre-stored double-wind-wheel wind generating set, and respectively calculate the electromagnetic torque compensation values of the first wind wheel and the second wind wheel based on the ideal working point; in addition, a prestored rotating speed torque curve corresponding to the first wind wheel and the second wind wheel respectively can be obtained, and the target electromagnetic torque of the first wind wheel and the target electromagnetic torque of the second wind wheel at the current wind speed are respectively determined based on the rotating speed torque curve; and then calculate the electromagnetic torque command signal of the first wind wheel and second wind wheel respectively according to the electromagnetic torque compensation value and goal electromagnetic torque, in order to control the first wind wheel and/or second wind wheel through the electromagnetic torque command signal, the whole control process has utilized the wind wheel rotational speed combination of the double wind wheel wind-driven generator, can guarantee the double wind wheel wind-driven generator is stable in the optimal running state under different wind speeds, and then instruct the running control of the double wind wheel wind-driven generator, give full play to the wind energy conversion ability of the double wind wheel wind-driven generator.
In practical use, the rotation speed combination curve is generally obtained by planning the rotation speeds of the front wind wheel and the rear wind wheel of the double wind wheel wind generating set by utilizing the pneumatic data of the double wind wheel wind generating set, and the rotation speed combination formed by the two rotation speeds is the optimal rotation speed combination at the current wind speed, so that the optimal rotation speed combination at a plurality of wind speeds is constructed, and the rotation speed combination at a plurality of wind speeds is connected to obtain the optimal rotation speed combination curve at a certain precision, namely the rotation speed combination curve in the embodiment of the invention. Experiments show that the rotating speed combinations of the front wind wheel and the rear wind wheel at different wind speeds are different, and the wind speeds correspond to the optimal rotating speed combinations one by one, so that the rotating speed combinations can be used for judging whether the fans of the double wind wheel wind generating set reach the maximum output power at the current wind speed.
Specifically, when the above rotational speed combination curve is planned, the following steps are generally included:
(1) Acquiring pre-stored pneumatic data of the double wind wheel wind generating set;
(2) Determining the rotating speed of the first wind wheel and the rotating speed of the second wind wheel corresponding to the maximum value of the output power of the whole machine of the double wind wheel wind generating set under the preset wind speed based on the pneumatic data, and generating a rotating speed combination comprising the rotating speed of the first wind wheel and the rotating speed of the second wind wheel;
(3) And generating a rotating speed combination curve in a pre-established rotating speed coordinate system according to rotating speed combinations at a plurality of preset wind speeds, wherein the abscissa and the ordinate of the rotating speed coordinate system are rotating speed values of the first wind wheel and the second wind wheel respectively.
In practical use, the aerodynamic data generally refer to power data, for example, aerodynamic power coefficients, etc., and referring to the definition of aerodynamic power coefficients in a single wind turbine, the aerodynamic power coefficients of a double wind turbine generator set may be expressed as:
wherein C is P Is the pneumatic power coefficient of the double wind wheel wind generating set; p (P) u Is the shaft power of the front wind wheel (first wind wheel); p (P) d Is the shaft power of the rear wind wheel (second wind wheel); ρ is the air density; a is that u Is the front wind wheel rotor area; a is that d Is the rear wind wheel rotor area; v is the average wind speed across the rotor.
The aerodynamic power coefficient characterizes the efficiency of the first wind wheel and the second wind wheel for obtaining energy from incoming flow, and can be adjusted and improved by changing the rotation speed and the pitch angle of the wind wheels in the running process of the wind generating set.
And the data analysis shows that when the rotation speed and the incoming wind speed of the front wind wheel and the rear wind wheel are the same, and the pitch angle reaches 0 at the same time, the output power is larger. And when the rotation speeds of the front wind wheel and the rear wind wheel reach a certain fixed combination, the whole output power is maximum. Moreover, one wind speed corresponds to one optimal front and rear rotor speed combination. By traversing the front and rear wind wheel rotation speed combinations according to a certain precision, the optimal wind wheel rotation speed combination at each wind speed can be obtained, and in a pre-established rotation speed coordinate system, each point is connected, so that an optimal rotation speed combination curve, namely the rotation speed combination curve in the embodiment of the invention, can be obtained.
For convenience of understanding, fig. 2 shows a schematic diagram of a rotation speed combination curve, specifically, in a rotation speed coordinate system shown in fig. 2, the abscissa and ordinate respectively indicate the rotation speed of a front wind wheel (first wind wheel) and the rotation speed of a rear wind wheel (second wind wheel), for example, when the output power of the whole machine is maximum at a wind speed V1, the rotation speed of the first wind wheel is n2, at this time, one rotation speed combination (n 1, n 2) corresponds, and similarly, when the output power of the whole machine is maximum at a wind speed V2, one rotation speed combination (n 11, n 12) corresponds, so that when a plurality of wind speeds are traversed, a plurality of rotation speed combinations when the output power of the whole machine is maximum can be obtained, points corresponding to each rotation speed combination can be marked in the rotation speed coordinate system shown in fig. 2, and the points are connected, so that the rotation speed combination curve in the embodiment of the invention can be obtained.
Further, when the output power of the whole wind turbine is maximum, the rotational speeds of the two wind wheels of the double wind wheel wind generating set are known at this time, the respective output powers and rotational speeds of the front wind wheel and the rear wind wheel can be obtained when traversing a plurality of wind speeds, and therefore, the rotational speed torque curve in the step S108 can be further obtained according to the corresponding relationship between the rotational speed and the torque of the wind generating set.
Specifically, when the rotation speed torque curve is generated, the output power of the first wind wheel and the output power of the second wind wheel under a plurality of preset wind speeds can be respectively determined according to the pneumatic data and the rotation speed combinations under a plurality of preset wind speeds; then generating a rotating speed torque curve of the first wind wheel according to the rotating speed of the first wind wheel contained in the combination of the output power and the rotating speed of the first wind wheel; and generating a rotational speed torque curve of the second wind wheel according to the rotational speed of the second wind wheel contained in the combination of the output power of the second wind wheel and the rotational speed. And respectively storing the rotating speed and torque curve of the first wind wheel and the rotating speed and torque curve of the second wind wheel so as to be capable of directly obtaining the rotating speed and torque curve for calculation in the running process of the double wind wheel wind generating set.
For ease of understanding, fig. 3 shows a rotational speed-torque diagram of a first rotor, fig. 4 shows a rotational speed-torque diagram of a second rotor, wherein the abscissa generally represents rotational speed, the ordinate generally represents torque, i.e. electromagnetic torque of the rotor, and fig. 3 and 4 show the starting rotational speed and the maximum rotational speed, respectively, of a corresponding fan, the starting point and the ending point, respectively, of the curve. Therefore, in the above-described step S108 and step S110, the target electromagnetic torque of the first wind wheel and the second wind wheel may be determined from the rotational speed torque curve.
Further, in the step S104, when searching the ideal working point corresponding to the wind wheel rotation speed combination on the rotation speed combination curve, the rotation speeds of the front wind wheel and the rear wind wheel of the double wind wheel wind generating set are actually compared with the optimal rotation speed combination on the rotation speed combination curve, and the most relevant point of the wind wheel rotation speed combination is searched on the rotation speed combination curve; the association points in the embodiment of the invention comprise one of the following: a nearest distance point from the wind wheel rotating speed combination on the rotating speed combination curve, a point at which the vertical direction of the wind wheel rotating speed combination intersects the rotating speed combination curve, a point at which the horizontal direction of the wind wheel rotating speed combination intersects the rotating speed combination curve, or any point at which the distance from the wind wheel rotating speed combination on the rotating speed combination curve is within a preset range; and determining the searched association point as an ideal working point corresponding to the wind wheel rotating speed combination, wherein the ideal working point comprises the ideal rotating speed of the first wind wheel and the ideal rotating speed of the second wind wheel at the moment.
For the sake of understanding, the schematic diagram of the rotational speed combination curve shown in fig. 2 is taken as an example for illustration, and the relevant points at this time include the closest distance point to the rotational speed combination of the wind wheel on the rotational speed combination curve, and it is assumed that (n 2, n 1) is the rotational speed combination of the wind wheel at the current wind speed, that is, the actual operating point of the double wind turbine wind generating set, and when the actual operating point operates at the point (n 2, n 1), the closest point (n 2t, n1 t) to the rotational speed combination curve can be obtained as the ideal operating point by calculating the distance from the point to the curve.
Further, when electromagnetic torque compensation values of the first wind wheel and the second wind wheel are calculated according to the ideal working point, the actual rotation speed of the first wind wheel and the actual rotation speed of the second wind wheel, which are included in the combination of the rotation speeds of the wind wheels at the moment, can be extracted; then calculating a rotational speed difference value of the first wind wheel according to the actual rotational speed of the first wind wheel and the ideal rotational speed of the first wind wheel included in the ideal working point; converting the rotating speed difference value of the first wind wheel into an electromagnetic torque compensation value corresponding to the first wind wheel according to a pre-stored weight coefficient of the first wind wheel; calculating a rotational speed difference of the second wind wheel according to the actual rotational speed of the second wind wheel and the ideal rotational speed of the second wind wheel included in the ideal working point; and converting the rotating speed difference value of the second wind wheel into an electromagnetic torque compensation value corresponding to the second wind wheel according to the pre-stored weight coefficient of the second wind wheel.
Also, taking the wind wheel rotation speed combination (n 2, n 1) and the ideal operation point (n 2t, n1 t) as shown in fig. 2 as an example, after determining the ideal operation point at this time, the difference between the rotation speeds of the first wind wheel and the second wind wheel corresponding to the ideal operation point, that is, Δ1= (n 1-n1 t), Δ2= (n 2-n2 t) may be calculated. The electromagnetic torque compensation value tec1=k1Δ1 and tec2=k2Δ2 can be obtained by a certain ratio or calculation method of the difference. The electromagnetic torque compensation values of the first wind wheel and the second wind wheel are Tec1 and Tec2, the electromagnetic torque compensation values of the first wind wheel and the second wind wheel are corresponding weight coefficients, the adjustment can be performed according to actual conditions, the size of the electromagnetic torque compensation values affects the speed of the actual working point to track the ideal working point, the specific weight coefficient can be set according to actual use conditions, further, in other embodiments, the primary function of delta used when the difference value is calculated can be used, other functions such as the secondary function and the like can be used, and the embodiment of the invention is not limited to the actual use conditions.
Further, after the electromagnetic torque compensation value is obtained, when the electromagnetic torque command signal is calculated, the target electromagnetic torques of the first wind wheel and the second wind wheel at the current wind speed are required to be searched according to the actual rotation speeds of the first wind wheel and the second wind wheel at the moment and according to the respective rotation speed torque curves shown in fig. 3 and 4, and then the electromagnetic torque compensation value of the first wind wheel and the target electromagnetic torque of the first wind wheel are subjected to superposition calculation to obtain the electromagnetic torque command signal of the first wind wheel; and performing superposition calculation on the electromagnetic torque compensation value of the second wind wheel and the target electromagnetic torque of the second wind wheel to obtain an electromagnetic torque command signal of the second wind wheel. The electromagnetic torque command signal of the first wind wheel and the electromagnetic torque command signal of the second wind wheel obtained at the moment are the final electromagnetic torque command signals of the double wind wheel wind generating set. During the operation of the double wind wheel wind generating set.
The first wind wheel and the second wind wheel can be controlled simultaneously through respective electromagnetic torque command signals, and the first wind wheel or the second wind wheel can be controlled independently according to the use requirement, so that the first wind wheel and the second wind wheel operate at the optimal rotation speed ratio, and the double wind wheel wind generating set can operate according to the optimal operation state in the operation interval within the range allowed by the design parameters.
Further, for easy understanding, fig. 5 shows a schematic diagram of an operation strategy of a double wind turbine generator system, and in a specific implementation, a coordinator controller of the double wind turbine generator system is used for determining an overall operation state of the double wind turbine generator system, and single-machine controllers corresponding to the first wind turbine and the second wind turbine are respectively used for matching with an operation state of a single machine, so that the double wind turbine generator system determines that the double wind turbine generator system runs in an optimal operation state through a rotation speed combination curve in an operation process. The optimal running state indicates that the actual output power of the double wind wheel wind generating set is the maximum power at the current wind speed, and further, the rotating speed torque curves corresponding to the first wind wheel and the second wind wheel respectively are usually stored in a single-machine-level controller and used for controlling the first wind wheel and the second wind wheel to work in the optimal state according to electromagnetic torque command signals.
The two-stage control strategy of the double wind wheel wind generating set can be realized through the coordination level controller and the single level controller shown in fig. 5, and the double wind wheel wind generating set can be operated according to the optimal operation state in the operation interval by controlling the pitch angles and the electromagnetic torque of the two wind wheels of the double wind wheel wind generating set within the range allowed by the design parameters.
In summary, the control method of the double wind wheel wind generating set provided by the embodiment of the invention uses the front and rear rotating speed combination of the double wind wheels as the wind driven generator, can ensure that the double wind wheel wind generating set is stable in an optimal running state under different wind speeds, and provides references for the running control of the double wind wheel wind generating set.
Further, on the basis of the above embodiment, the embodiment of the present invention further provides a control device for a double wind turbine generator system, where the double wind turbine generator system is a tandem double wind turbine generator system, and includes a first wind turbine and a second wind turbine, and as shown in fig. 6, a control device for a double wind turbine generator system includes:
a first obtaining module 60, configured to obtain a wind wheel rotation speed combination of the double wind wheel wind generating set at a current wind speed, where the wind wheel rotation speed combination includes an actual rotation speed of the first wind wheel and an actual rotation speed of the second wind wheel at the current wind speed;
The searching module 62 is configured to search an ideal operating point corresponding to the wind wheel rotation speed combination on a prestored rotation speed combination curve of the double wind wheel wind generating set;
a first calculation module 64 for calculating electromagnetic torque compensation values of the first wind wheel and the second wind wheel based on the ideal operating point, respectively;
a second obtaining module 66, configured to obtain prestored rotational speed torque curves corresponding to the first wind wheel and the second wind wheel, and determine target electromagnetic torques of the first wind wheel and the second wind wheel at a current wind speed based on the rotational speed torque curves;
a second calculation module 68 is configured to calculate electromagnetic torque command signals of the first wind wheel and the second wind wheel according to the electromagnetic torque compensation value and the target electromagnetic torque, so as to control the first wind wheel and/or the second wind wheel through the electromagnetic torque command signals.
Further, the embodiment of the invention also provides a double-wind-wheel wind generating set, and the controller of the double-wind-wheel wind generating set is provided with the two-stage operation control device of the double-wind-wheel wind generating set shown in fig. 6.
The control device of the double wind wheel wind generating set provided by the embodiment of the invention has the same technical characteristics as the control method of the double wind wheel wind generating set provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
Further, the embodiment of the invention also provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the steps of the method when executing the computer program.
Embodiments of the present invention also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above method.
Further, an embodiment of the present invention provides a schematic structural diagram of an electronic device, as shown in fig. 7, where the electronic device includes a processor 71 and a memory 70, where the memory 70 stores computer executable instructions that can be executed by the processor 71, and the processor 71 executes the computer executable instructions to implement the above method.
In the embodiment shown in fig. 7, the electronic device further comprises a bus 72 and a communication interface 73, wherein the processor 71, the communication interface 73 and the memory 70 are connected by the bus 72.
The memory 70 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. The communication connection between the system network element and the at least one other network element is achieved via at least one communication interface 73 (which may be wired or wireless), which may use the internet, a wide area network, a local network, a metropolitan area network, etc. Bus 72 may be an ISA (Industry Standard Architecture ) bus, PCI (Peripheral Component Interconnect, peripheral component interconnect standard) bus, or EISA (Extended Industry Standard Architecture ) bus, among others. The bus 72 may be classified as an address bus, a data bus, a control bus, or the like. For ease of illustration, only one bi-directional arrow is shown in FIG. 7, but not only one bus or type of bus.
The processor 71 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in the processor 71. The processor 71 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (Digital Signal Processor, DSP for short), application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), field-programmable gate arrays (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory and the processor 71 reads the information in the memory and in combination with its hardware performs the method described above.
The computer program product of the double wind wheel wind generating set, the control method and the device thereof provided by the embodiment of the invention comprise a computer readable storage medium storing program codes, the instructions included in the program codes can be used for executing the method described in the method embodiment, and specific implementation can be seen in the method embodiment and will not be repeated here.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the double wind turbine generator set and the device described above may refer to the corresponding process in the foregoing method embodiment, and will not be described herein again.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood by those skilled in the art in specific cases.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention for illustrating the technical solution of the present invention, but not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the foregoing examples, it will be understood by those skilled in the art that the present invention is not limited thereto: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (9)
1. The control method of the double-wind-wheel wind generating set is characterized in that the double-wind-wheel wind generating set is a tandem double-wind-wheel wind generating set and comprises a first wind wheel and a second wind wheel, and the method comprises the following steps:
acquiring a wind wheel rotating speed combination of the double wind wheel wind generating set at the current wind speed, wherein the wind wheel rotating speed combination comprises the actual rotating speed of the first wind wheel and the actual rotating speed of the second wind wheel at the current wind speed;
Searching an ideal working point corresponding to the wind wheel rotating speed combination on a rotating speed combination curve of the pre-stored double wind wheel wind generating set;
respectively calculating electromagnetic torque compensation values of the first wind wheel and the second wind wheel based on the ideal working point;
acquiring prestored rotating speed torque curves corresponding to the first wind wheel and the second wind wheel respectively, and respectively determining target electromagnetic torques of the first wind wheel and the second wind wheel at the current wind speed based on the rotating speed torque curves;
respectively calculating electromagnetic torque command signals of the first wind wheel and the second wind wheel according to the electromagnetic torque compensation value and the target electromagnetic torque so as to control the first wind wheel and/or the second wind wheel through the electromagnetic torque command signals;
the rotating speed combination curve is obtained by planning the rotating speeds of the first wind wheel and the second wind wheel under different wind speeds by utilizing the pneumatic data of the double wind wheel wind generating set and is used for describing the rotating speeds of the first wind wheel and the second wind wheel when the whole output power of the double wind wheel wind generating set is maximum under a certain wind speed;
searching an ideal working point corresponding to the wind wheel rotating speed combination on a rotating speed combination curve of the pre-stored double wind wheel wind generating set, wherein the step comprises the following steps:
Searching a correlation point of the wind wheel rotating speed combination on the rotating speed combination curve, wherein the correlation point comprises one of the following components: the nearest distance point from the wind wheel rotating speed combination on the rotating speed combination curve, the point at which the vertical direction of the wind wheel rotating speed combination intersects with the rotating speed combination curve, the point at which the horizontal direction of the wind wheel rotating speed combination intersects with the rotating speed combination curve, or any point from the wind wheel rotating speed combination within a preset range on the rotating speed combination curve;
and determining the searched association points as ideal working points corresponding to the wind wheel rotating speed combinations, wherein the ideal working points comprise the ideal rotating speed of the first wind wheel and the ideal rotating speed of the second wind wheel.
2. The method according to claim 1, wherein the method further comprises:
acquiring pre-stored pneumatic data of the double wind wheel wind generating set;
determining the rotating speed of the first wind wheel and the rotating speed of the second wind wheel corresponding to the maximum value of the output power of the whole machine of the double wind wheel wind generating set under the preset wind speed based on the pneumatic data, and generating a rotating speed combination comprising the rotating speed of the first wind wheel and the rotating speed of the second wind wheel;
And generating a rotating speed combination curve in a pre-established rotating speed coordinate system according to the rotating speed combination at a plurality of preset wind speeds, wherein the abscissa and the ordinate of the rotating speed coordinate system are rotating speed values of the first wind wheel and the second wind wheel respectively.
3. The method according to claim 1, wherein the step of calculating electromagnetic torque compensation values of the first wind wheel and the second wind wheel, respectively, based on the ideal operating point, comprises:
extracting the actual rotating speed of the first wind wheel and the actual rotating speed of the second wind wheel included in the wind wheel rotating speed combination;
calculating a rotational speed difference value of the first wind wheel according to the actual rotational speed of the first wind wheel and the ideal rotational speed of the first wind wheel included in the ideal working point;
converting the rotating speed difference value of the first wind wheel into an electromagnetic torque compensation value corresponding to the first wind wheel according to a pre-stored weight coefficient of the first wind wheel; the method comprises the steps of,
calculating a rotational speed difference of the second wind wheel according to the actual rotational speed of the second wind wheel and the ideal rotational speed of the second wind wheel included in the ideal working point;
and converting the rotating speed difference value of the second wind wheel into an electromagnetic torque compensation value corresponding to the second wind wheel according to a pre-stored weight coefficient of the second wind wheel.
4. The method according to claim 2, wherein the method further comprises:
respectively determining the output power of the first wind wheel and the output power of the second wind wheel at a plurality of preset wind speeds according to the pneumatic data and the rotation speed combinations at the plurality of preset wind speeds;
generating a rotating speed torque curve of the first wind wheel according to the output power of the first wind wheel and the rotating speed of the first wind wheel contained in the rotating speed combination; the method comprises the steps of,
and generating a rotating speed torque curve of the second wind wheel according to the output power of the second wind wheel and the rotating speed of the second wind wheel contained in the rotating speed combination.
5. The method of claim 1, wherein the step of calculating the electromagnetic torque command signals for the first wind wheel and the second wind wheel, respectively, from the electromagnetic torque compensation value and the target electromagnetic torque, comprises:
performing superposition calculation on the electromagnetic torque compensation value of the first wind wheel and the target electromagnetic torque of the first wind wheel to obtain an electromagnetic torque command signal of the first wind wheel; the method comprises the steps of,
and performing superposition calculation on the electromagnetic torque compensation value of the second wind wheel and the target electromagnetic torque of the second wind wheel to obtain an electromagnetic torque command signal of the second wind wheel.
6. The utility model provides a controlling means of double wind wheel wind generating set, its characterized in that, double wind wheel wind generating set is tandem double wind wheel wind generating set, including first wind wheel and second wind wheel, the device includes:
the first acquisition module is used for acquiring a wind wheel rotating speed combination of the double wind wheel wind generating set at the current wind speed, wherein the wind wheel rotating speed combination comprises the actual rotating speed of the first wind wheel and the actual rotating speed of the second wind wheel at the current wind speed;
the searching module is used for searching an ideal working point corresponding to the wind wheel rotating speed combination on a rotating speed combination curve of the pre-stored double wind wheel wind generating set;
the first calculation module is used for calculating electromagnetic torque compensation values of the first wind wheel and the second wind wheel respectively based on the ideal working point;
the second acquisition module is used for acquiring prestored rotating speed torque curves corresponding to the first wind wheel and the second wind wheel respectively, and determining target electromagnetic torques of the first wind wheel and the second wind wheel under the current wind speed respectively based on the rotating speed torque curves;
the second calculation module is used for calculating electromagnetic torque command signals of the first wind wheel and the second wind wheel according to the electromagnetic torque compensation value and the target electromagnetic torque respectively so as to control the first wind wheel and/or the second wind wheel through the electromagnetic torque command signals;
The rotating speed combination curve is obtained by planning the rotating speeds of the first wind wheel and the second wind wheel under different wind speeds by utilizing the pneumatic data of the double wind wheel wind generating set and is used for describing the rotating speeds of the first wind wheel and the second wind wheel when the whole output power of the double wind wheel wind generating set is maximum under a certain wind speed;
in the searching module, searching an ideal working point corresponding to the wind wheel rotating speed combination on a rotating speed combination curve of the pre-stored double wind wheel wind generating set comprises the following steps:
searching a correlation point of the wind wheel rotating speed combination on the rotating speed combination curve, wherein the correlation point comprises one of the following components: the nearest distance point from the wind wheel rotating speed combination on the rotating speed combination curve, the point at which the vertical direction of the wind wheel rotating speed combination intersects with the rotating speed combination curve, the point at which the horizontal direction of the wind wheel rotating speed combination intersects with the rotating speed combination curve, or any point from the wind wheel rotating speed combination within a preset range on the rotating speed combination curve;
and determining the searched association points as ideal working points corresponding to the wind wheel rotating speed combinations, wherein the ideal working points comprise the ideal rotating speed of the first wind wheel and the ideal rotating speed of the second wind wheel.
7. A twin-rotor wind power generator set, characterized in that a controller of the twin-rotor wind power generator set is provided with the twin-rotor wind power generator set two-stage operation control device according to claim 6.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of any of the preceding claims 1-5 when the computer program is executed.
9. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, performs the steps of the method according to any of the preceding claims 1-5.
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