CN113309662B - Wind power cut-out control method for improving wind energy utilization rate of wind generating set - Google Patents
Wind power cut-out control method for improving wind energy utilization rate of 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
- 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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- 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
- F05B2270/70—Type of control algorithm
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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
The invention discloses a wind power cut-out control method for improving the wind energy utilization rate of a wind generating set, which comprises the following steps: acquiring anemometer signal V t Obtaining filtering results of different time lengths by different filters(ii) a Judging whether the filtering result of the wind speed signal is greater than two sets of set values or not to obtain two sets of Boolean values; judging whether to stop the machine according to the first group of Boolean values; if the machine is not stopped, executing power reduction operation according to the second group of Boolean values and the corresponding duration; and judging whether to execute power recovery operation or not according to the relationship between the filtering result and the set value in the preset time. The invention can reduce fatigue load, reduce the windward shutdown condition of the wind generating set and improve the generating capacity by improving the control algorithm of the wind generating set under the condition of not improving the structural design of the wind generating set.
Description
Technical Field
The invention relates to the technical field of wind power control, in particular to a wind power cut-out control method for improving the wind energy utilization rate of a wind generating set.
Background
Wind power cut-out control of the wind generating set is an important component of a safety chain of the wind turbine, and has important influence on the safety and fatigue life of the wind turbine as well as the environmental adaptation range and the generating capacity of the wind generating set. The existing main stream cut-out control method is simple 'filtering detection + shutdown', namely, when a detection value exceeds different set intervals, different safety chains are triggered to shut down. With the technical development, the power of the wind generating set and the diameter of a wind wheel are obviously increased, and the existing simple 'filtering detection + shutdown' control cannot meet the stable operation requirement of the set with higher power. The conservative wind power cut-out control method can cause the wind generating set to frequently trigger a safety chain to stop when the wind generating set operates near the cut-out wind speed, and influences the generating capacity and the fatigue life of the set; otherwise, the load is too large, and the safety of the unit is affected.
At present, a mainstream wind power cut-out control method of a wind generating set is a scheme of filtering detection and shutdown, and the specific flow is as follows: detecting a wind speed and direction signal; the wind speed signal passes through a filter 1 (filter time t) 1 ): wind speed greater than V 1 The safety chain 1 is triggered; the wind speed signal is filteredFilter 2 (filter time t) 2 ): wind speed greater than V 2 The safety chain 2 is triggered; the wind speed signal passes through a filter 3 (filter time t) 3 ): wind speed greater than V 3 The safety chain 3 is triggered; and returning to the first step.
The invention patent with application number of CN201310145928.4 discloses a control method for increasing cut-out wind speed of a fan, which is a fan tower vibration suppression system and a control system for increasing the cut-out wind speed of the fan, and is characterized in that when the wind speed exceeds the design cut-out wind speed of the fan, the rated rotating speed of a generator is reduced to increase the cut-out wind speed of the fan. The reduction of the rated rotating speed of the generator can lead to the increase of the current of the generator, and the method can be applied only by improving the grade parameters of the generator and the converter.
The invention patent with the application number of CN201811587564.4 provides a control method for improving the high wind power generation capacity of a wind turbine generator, which aims to improve the power generation capacity by reducing power and improving cut-out wind speed. I.e. when the measured average wind speed exceeds a certain value, the given power is operated at a fixed rate of decreasing power. Although the method can improve the cut-out wind speed, the problem of overlarge limit load under the working condition of large turbulence cannot be solved, and the unit can still be stopped frequently due to overlarge instantaneous wind speed under the working condition of large turbulence.
Disclosure of Invention
In view of this, an object of the embodiments of the present invention is to provide a wind power cut-out control method for improving the wind energy utilization rate of a wind turbine generator system, which can reduce fatigue load, reduce the windward shutdown condition of the wind turbine generator system, and improve the power generation amount by improving the control algorithm of the wind turbine generator system without improving the structural design of the wind turbine generator system.
The embodiment of the invention provides a wind power cut-out control method for improving the wind energy utilization rate of a wind generating set, wherein the wind power cut-out control method comprises the following steps:
acquiring anemometer signal V t And obtaining filtering results of different time lengths through different filters.
And judging whether the filtering result of the wind speed signal is greater than two sets of set values or not to obtain two sets of Boolean values.
And judging whether to stop according to the first group of Boolean values.
If not, the power-down operation is executed according to the second group of Boolean values.
And judging whether to execute power recovery operation or not according to the relationship between the filtering result and the set value in the preset time.
The embodiment of the present invention provides a first possible implementation manner, wherein the acquiring of the anemometer signal V t Obtaining filtering results of different time lengths through different filters, including:
acquiring an anemometer signal V at t time t 。
Through each filter, T is acquired separately 1 Second filtering result V 1 、T 2 Second filtering result V 2 、 T 3 Second filtering result V 3 。
The embodiment of the present invention provides a second possible implementation manner, where the determining whether the filtering result of the wind speed signal is greater than two sets of setting values to obtain two sets of boolean values includes:
judging the filtering result (V) of the wind speed signal 1 ,V 2 ,V 3 ) Whether or not it is greater than a first set of set values (V) out11 ,V out21 ,V out31 ) If greater than 1, then it is recorded as 1, if less than 0, then a first set of three Boolean values (b) is obtained 11 ,b 21 ,b 31 )。
Judging the filtering result (V) of the wind speed signal 2 ,V 3 ) Whether or not it is greater than a second set of set values (V) out22 ,V out32 ) If greater than the first two Boolean values, the first two Boolean values are recorded as 1, if less than the first two Boolean values are recorded as 0, and the second two Boolean values are obtained 22 ,b 32 )。
Embodiments of the present invention provide a third possible implementation manner, wherein,
of the two sets of set values, V out11 <V out22 <V out21 ≤V out32 <V out31 。
An embodiment of the present invention provides a fourth possible implementation manner, where the determining whether to shut down according to the first group of boolean values includes:
if in the first set of Boolean values, b 11 1 or b 21 1 or b 31 And (5) triggering the safety chain of the over-cut wind speed to stop normally when the speed is 1.
If b is 11 0, while b 21 0, while b 31 And if the value is 0, judging the second group of Boolean values.
An embodiment of the present invention provides a fifth possible implementation manner, where if the operation is not stopped, performing power down operation according to a second set of boolean values includes:
when b is 22 When 1, a first set of power down operating schemes is executed.
When b is 32 When the power is equal to 1, a second group of power reduction operation schemes are executed.
An embodiment of the present invention provides a sixth possible implementation manner, where the first group of power-down operation schemes include:
extracting b from the second set of Boolean values 22 Corresponding duration t 2 。
If t 2 <t 02 Then executing power down to the preset power P 1 And (5) operating.
If t 2 ≥t 02 Then executing power down to the preset power P 2 And (5) operating.
Wherein t is 02 Is a set value.
The embodiment of the present invention provides a seventh possible implementation manner, where the second group of power-down operation schemes include:
extracting b from the second set of Boolean values 32 Corresponding duration t 3 。
If t 3 <t 03 Then executing power down to the preset power P 3 And (5) operating.
If t 3 ≥t 03 Then executing power down to the preset power P 4 And (4) operating.
Wherein t is 03 Is a set value.
An eighth possible implementation manner is provided in the embodiments of the present invention, where the determining whether to execute power restoration operation according to a relationship between a filtering result and a set value in a preset time includes:
t before recording n V within second 2 And V 3 Greater than a second set of set points (V) out22 ,V out32 ) Number of times (n) 2 ,n 3 )。
If n is 2 0, while n 3 When the power is equal to 0, the power recovery is performed to the rated power P 0 And (5) operating.
If n is 3 >0, then performing power down to the preset power P 3 Or P 4 And (4) operating.
If n is 2 >0, then executing power down to the preset power P 1 And (5) operating.
The embodiment of the invention has the beneficial effects that:
the invention provides a novel wind power cut-out control method for improving the wind energy utilization rate of a wind generating set, which reduces fatigue load, reduces the windward halt condition of the wind generating set and improves the generating capacity by improving the control algorithm of the wind generating set under the condition of not improving the structural design of the wind generating set. The method can effectively reduce the probability of shutdown when the wind generating set operates near the cut-out wind speed under the condition of high turbulence, thereby improving the wind energy utilization rate of the wind generating set, and reducing the limit load caused by high wind and the fatigue life loss caused by frequent startup and shutdown.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of a wind power cut-out control method for improving the wind energy utilization rate of a wind generating set according to the present invention;
FIG. 2 is a complete flow chart of a wind power cut-out control method for improving the wind energy utilization rate of a wind generating set according to the present invention;
FIG. 3 is a schematic power-down operation control flow diagram of the wind power cut-out control method for improving the wind energy utilization rate of the wind generating set.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.
Referring to fig. 1 to 3, an embodiment of the present invention provides a wind power cut-off control method for improving wind energy utilization of a wind turbine generator system, including:
acquiring anemometer signal V t And obtaining filtering results of different time lengths through different filters.
And judging whether the filtering result of the wind speed signal is greater than two sets of set values or not to obtain two sets of Boolean values.
And judging whether to stop the machine according to the first group of Boolean values.
If not, the power-down operation is executed according to the second group of Boolean values.
And judging whether to execute power recovery operation or not according to the relationship between the filtering result and the set value in the preset time.
The embodiment of the present invention provides a first possible implementation manner, wherein the acquiring of the anemometer signal V t Obtaining filtering results of different time lengths through different filters, including:
acquiring an anemometer signal V at t time t 。
Through each filter, T is acquired separately 1 600 seconds filtering result V 1 、T 2 Filtering result V of 3 seconds 2 、T 3 Filtering result V of 1 second 3 。
The embodiment of the present invention provides a second possible implementation manner, where the determining whether the filtering result of the wind speed signal is greater than two sets of setting values to obtain two sets of boolean values includes:
judging the filtering result (V) of the wind speed signal 1 ,V 2 ,V 3 ) Whether or not it is greater than a first set of set values (V) out11 ＝20m/s,V out21 ＝30m/s,V out31 35m/s), if greater than 1, and if less than 0, a first set of three boolean values (b) is obtained 11 ,b 21 ,b 31 )。
Judging the filtering result (V) of the wind speed signal 2 ,V 3 ) Whether or not it is greater than a second set of set values (V) out22 ＝25m,V out32 30m) and if greater, is 1 and if less, is 0, a second set of two boolean values (b) is obtained 22 ,b 32 )。
Embodiments of the present invention provide a third possible implementation manner, wherein,
of the two sets of set values, V out11 <V out22 <V out21 ≤V out32 <V out31 。
An embodiment of the present invention provides a fourth possible implementation manner, where the determining whether to shut down according to the first group of boolean values includes:
if in the first set of Boolean values, b 11 1 or b 21 1 or b 31 And (5) triggering the safety chain of the over-cut wind speed to stop normally when the speed is 1.
If b is 11 0, while b 21 0, while b 31 And if the value is 0, judging the second group of Boolean values.
An embodiment of the present invention provides a fifth possible implementation manner, where if the operation is not stopped, performing power down operation according to a second set of boolean values includes:
when b is 22 When 1, a first set of power down operating schemes is executed.
When b is 32 When the power is equal to 1, a second group of power reduction operation schemes are executed.
An embodiment of the present invention provides a sixth possible implementation manner, where the first group of power-down operation schemes include:
extracting b from the second set of Boolean values 22 Corresponding duration t 2 。
If t 2 <t 02 Then performing power down to the predetermined power P 1 Run 2.8 MW.
If t 2 ≥t 02 Then executing power down to the preset power P 2 Run 2.4 MW.
Wherein t is 02 Is a set value.
The embodiment of the present invention provides a seventh possible implementation manner, where the second group of power-down operation schemes include:
extracting b from the second set of Boolean values 32 Corresponding duration t 3 。
If t is 3 <t 03 Then executing power down to the preset power P 3 Run 2.4 MW.
If t 3 ≥t 03 Then performing power down to the predetermined power P 4 Run at 1.4 MW.
Wherein t is 03 Is a set value.
An eighth possible implementation manner is provided in the embodiments of the present invention, where the determining whether to execute power restoration operation according to a relationship between a filtering result and a set value in a preset time includes:
record V within 300 seconds 2 And V 3 Greater than a second set of set points (V) out22 ＝25m,V out32 30m) (n) of the number of times 2 ,n 3 )。
If n is 2 0, while n 3 When the power is equal to 0, the power recovery is performed to the rated power P 0 Run at 3.0 MW.
If n is 3 >0, then executing power down to the preset power P 3 Run 2.4 MW.
If n is 2 >0, then executing power down to the preset power P 1 Run 2.8 MW.
The embodiment of the invention aims to protect a wind power cut-out control method for improving the wind energy utilization rate of a wind generating set, and the method has the following effects:
the invention provides a novel wind power cut-out control method for improving the wind energy utilization rate of a wind generating set, which reduces fatigue load, reduces the windward shutdown condition of the wind generating set and improves the generating capacity by improving the control algorithm of the wind generating set under the condition of not improving the structural design of the wind generating set. The method can effectively reduce the probability of shutdown when the wind generating set operates near the cut-out wind speed under the condition of high turbulence, thereby improving the wind energy utilization rate of the wind generating set, and reducing the limit load caused by high wind and the fatigue life loss caused by frequent startup and shutdown.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A wind power cut-out control method for improving the wind energy utilization rate of a wind generating set is characterized by comprising the following steps:
acquiring anemometer signal V t Obtaining filtering results of different time lengths through different filters;
judging whether the filtering result of the wind speed signal is greater than two sets of set values or not to obtain two sets of Boolean values;
judging whether to stop the machine according to the first group of Boolean values;
if the machine is not stopped, executing power reduction operation according to the second group of Boolean values;
judging whether to execute power recovery operation or not according to the relationship between the filtering result and the set value within the preset time;
wherein, whether the filtering result of the wind speed signal is greater than two sets of set values is judged to obtain two sets of Boolean values, and the method comprises the following steps:
judging the filtering result (V) of the wind speed signal 1 ,V 2 ,V 3 ) Whether or not it is greater than a first set of set values (V) out11 ,V out21 ,V out31 ) If greater than 1, then it is recorded as 1, if less than 0, then a first set of three Boolean values (b) is obtained 11 ,b 21 ,b 31 )；
Wherein, V 1 Is T 1 Second filtering result, V 2 Is T 2 Second filtering result, V 3 Is T 3 Second filtering result, V t Is an anemometer signal at time t;
judging the filtering result (V) of the wind speed signal 2 ,V 3 ) Whether or not it is greater than a second set of set values (V) out22 ,V out32 ) If greater than the first two Boolean values, the first two Boolean values are recorded as 1, if less than the first two Boolean values are recorded as 0, and the second two Boolean values are obtained 22 ,b 32 )。
2. Wind power cut-out control method for improving wind energy utilization rate of wind generating set according to claim 1, characterized in that the collected anemometer signal V t Obtaining filtering results of different time lengths through different filters, including:
acquiring an anemometer signal V at t time t ；
Through each filter, T is acquired separately 1 Second filtering result V 1 、T 2 Second filtering result V 2 、T 3 Second filtering result V 3 。
3. The wind power cut-out control method for improving the wind energy utilization rate of a wind generating set according to claim 2,
of the two sets of set values, V out11 <V out22 <V out21 ≤V out32 <V out31 。
4. The wind power cut-out control method for improving the wind energy utilization rate of the wind generating set according to claim 2, wherein the judging whether to stop the wind generating set according to the first group of Boolean values comprises the following steps:
if in the first set of Boolean values, b 11 1 or b 21 1 or b 31 If the wind speed is 1, triggering an over-cut wind speed safety chain, and stopping the machine normally;
if b is 11 0, while b 21 0, while b 31 And if the value is 0, judging the second group of Boolean values.
5. The wind power cut-off control method for improving the wind energy utilization rate of the wind generating set according to claim 4, wherein the step of performing the power-down operation according to the second group of Boolean values if the wind generating set is not stopped comprises the following steps:
when b is 22 When the power is equal to 1, executing a first group of power reduction operation schemes;
when b is 32 When the power is equal to 1, a second group of power reduction operation schemes are executed.
6. The wind park control method of increasing wind energy utilization of a wind turbine generator set according to claim 5, wherein the first set of derated operating scenarios comprises:
extracting b from the second set of Boolean values 22 Corresponding duration t 2 ；
If t 2 <t 02 Then executing power down to the preset power P 1 Running;
if t 2 ≥t 02 Then executing power down to the preset power P 2 Running;
wherein t is 02 Is a set value.
7. The wind power cut-out control method for improving wind energy utilization efficiency of a wind generating set according to claim 5, wherein the second set of derated operating schemes comprises:
extracting b from the second set of Boolean values 32 Corresponding duration t 3 ；
If t 3 <t 03 Then executing power down to the preset power P 3 Running;
if t 3 ≥t 03 Then executing power down to the preset power P 4 Running;
wherein t is 03 Is a set value.
8. The wind power cut-off control method for improving the wind energy utilization rate of the wind generating set according to claim 6, wherein the judging whether to execute the power recovery operation according to the relationship between the filtering result and the set value in the preset time comprises:
t before recording n V within second 2 And V 3 Greater than a second set of set points (V) out22 ,V out32 ) Number of times (n) 2 ,n 3 )；
If n is 2 0, while n 3 When the power is equal to 0, the recovery of the power to the rated power P is performed 0 Running;
if n is 3 >0, then executing power down to the preset power P 3 Or P 4 Running;
if n is 2 >0, then executing power down to the preset power P 1 And (5) operating.
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