Wind power prediction device and method

Abstract

The application discloses a wind power prediction device and method, which comprises a combined cabin, wherein a main generator unit and an auxiliary generator unit are arranged and are respectively matched with a main wind wheel and an auxiliary wind wheel; the combined cabin is provided with a weather measuring device; and the main generator unit short-term power generation prediction value and the ultra-short-term power generation prediction value can be obtained according to the weather data collected by the weather measuring device and the wind field historical data. When the wind power field can reach the ultra-short-term power generation prediction value, the auxiliary generator unit only supplies power to various devices in the wind power field; when the main generator unit cannot reach the ultra-short-term power generation prediction value in a certain time unit due to the influence of wind power, the auxiliary generator unit will make up the error in the time unit.

Description

Technical Field

[0001] This invention relates to the field of wind power generation. More specifically, this invention relates to a wind power prediction device and method. Background Technology

[0002] With the continuous development of the concept of energy conservation and emission reduction, new energy sources, especially wind power, have been vigorously developed in my country this year. As a grid-connected power source, wind farms need to participate in day-ahead market bidding. Therefore, the reliance on and demand for wind power forecasting is increasing. However, due to the influence of weather and meteorological conditions on wind power generation, it has strong inaccuracies and uncertainties. It is difficult for each wind farm to obtain power generation that is completely consistent with the theoretical power generation within a unit of time. There is generally a power generation error of 5%-10%, which not only affects grid connection but also causes economic losses to grid operation.

[0003] To better achieve the planned power generation per unit time of a wind farm, in addition to timely adjustment of the working status of each wind turbine within the wind farm, it is also necessary to predict the power generation of the wind farm. Currently, wind farms often use various prediction software or models to predict the short-term and ultra-short-term power generation of the entire wind farm using historical meteorological data. For example, the short-term power generation plan of the wind farm is then formulated based on the prediction results. Patent CN114048930B discloses a method and device for predicting ultra-short-term wind farm power based on a mathematical model, which can obtain the ultra-short-term wind power prediction of the wind farm. However, the prediction models of various methods all have errors, and it is difficult to make up for the deviation in power generation during the execution of the power generation plan. Therefore, it is necessary to invent a wind power prediction device that can not only collect meteorological data, but also make effective corrections based on the power generation plan, so that the wind farm can accurately execute the power generation prediction results. Summary of the Invention

[0004] One objective of this invention is to provide a wind power forecasting device and method that can capture meteorological data and formulate short-term and ultra-short-term power generation plans based on the meteorological data, and continuously correct the real-time power generation during power generation to achieve the goal of accurately executing the power generation plan.

[0005] To achieve these and other advantages according to the invention, according to one aspect of the invention, a wind power forecasting device and method are provided, comprising:

[0006] A modular nacelle includes a modular support frame, which includes a first frame. Multiple frame columns are mounted on the first frame, and a second frame is connected to the middle of all the frame columns. The bottom of the first frame is connected to the nacelle floor plate, which is covered by a nacelle cover. The space between the first frame and the second frame, which is enclosed by the nacelle cover, is the first compartment. The space above the second frame, which is enclosed by the nacelle cover, is the second compartment. Meteorological measuring devices are installed in the second compartment.

[0007] The main generator unit is located in the first compartment and installed on the first frame, and is connected to the main wind turbine outside the combined nacelle.

[0008] The auxiliary generator unit is located in the second compartment and installed on the second frame. It has an auxiliary wind turbine connected to the outside of the combined nacelle. The auxiliary wind turbine is opposite to the main wind turbine and has a different axis. The rated power of the auxiliary generator unit is less than 20% of the rated power of the main generator unit.

[0009] The wind turbine tower has an adjustable support platform rotatably connected to it, and the combined support is fixedly connected to the adjustable support platform.

[0010] Preferably, the net length, width, and height of the first compartment are all greater than those of the second compartment. The first frame extends axially throughout the first compartment, and the distance between the first frame and the side walls of the nacelle cover is more than 1000mm. The first compartment houses an electrical control cabinet and data acquisition and transmission equipment, whose signals are connected to the main server.

[0011] Preferably, the second compartment is equipped with an air-cooled cooling device, which is powered by the auxiliary generator set.

[0012] Preferably, the meteorological measuring device is used to collect parameters such as wind speed, wind direction, temperature, humidity, and air pressure and transmit them to the data acquisition and transmission equipment, which processes and stores the acquired data.

[0013] Preferably, the main generator set is a doubly-fed induction generator set, which includes a first slow-speed shaft connected to the main wind turbine bearing. The first slow-speed shaft is sequentially connected to a first gearbox, a first high-speed shaft, and the main generator in a first compartment. The auxiliary generator set is also a doubly-fed induction generator set, which includes a second slow-speed shaft connected to the auxiliary wind turbine bearing. The auxiliary generator is sequentially connected to a second gearbox, a second high-speed shaft, and the auxiliary generator in a second compartment.

[0014] Preferably, the combined support frame is made of light steel profiles.

[0015] Preferably, the method of using the wind power forecasting device is characterized by comprising the following steps:

[0016] S1. The data acquisition controllers of each wind power forecasting device send historical data to the central server for aggregation. The central server connects to the network to obtain historical wind field meteorological data and real-time meteorological data.

[0017] S2. The main server performs short-term power prediction for the main generator units of each wind power prediction device for the next 0-72 hours, thereby obtaining the short-term predicted power generation of the entire wind farm and reporting it. The short-term predicted power generation is then broken down into several ultra-short-term predicted power generation units every 15 minutes.

[0018] S3. After the power generation plan is executed, the power of each main generator unit is monitored at all times, and the power generation of the main generator unit is statistically analyzed every 15 minutes. If the real-time power generation of the main generator unit is less than the corresponding ultra-short-term predicted power generation for that time period, the power generation deficit is made up by allocating each auxiliary generator unit in the next 15-minute time period. If the power generation of the main generator unit is greater than the ultra-short-term predicted power generation, the power generation is reduced by adjusting the number of main generator units and auxiliary generator units working in the next 15-minute time period.

[0019] S4. Repeat step S3 in 15-minute intervals to achieve the goal of accurately predicting short-term power generation.

[0020] The present invention has at least the following beneficial effects:

[0021] First, this invention independently collects meteorological data and transmits it to a central server for predicting short-term and ultra-short-term power generation from wind farms.

[0022] Secondly, the large and small generator sets of the present invention can be flexibly adjusted to address the error in power generation per unit time, and have power generation control measures, so that the short-term power generation prediction results are accurate and controllable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a wind power prediction device in one technical solution of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of a wind power prediction device in one technical solution of the present invention;

[0025] Figure 3 This is a schematic diagram illustrating the structure and function of a wind power forecasting device in one of the technical solutions of the present invention. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can implement it based on the description.

[0027] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0028] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials mentioned are commercially available. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0029] like Figures 1-3 As shown, the present invention provides a wind power forecasting device, comprising:

[0030] The modular cabin 60 includes a modular support frame 3, which includes a first frame 31. Multiple frame columns 33 are mounted on the first frame 31. A second frame 32 is connected to the middle of all the frame columns 33. The bottom of the first frame 31 is connected to the cabin floor plate 62 outward. The cabin floor plate 62 is covered by a cabin cover 600. The space between the first frame 31 and the second frame 32, which is enclosed by the cabin cover 600, is the first compartment 601. The space above the second frame 32, which is enclosed by the cabin cover 600, is the second compartment 602. A meteorological measuring device 5 is installed on the second compartment 602.

[0031] The main generator unit 1 is located in the first compartment 601 and installed on the first frame 31. The main wind turbine 11 is connected to the outside of the combined nacelle 60.

[0032] Auxiliary generator unit 2 is located in the second compartment 602 and installed on the second frame 32. It is connected to an auxiliary wind turbine 21 outside the combined nacelle 60. The auxiliary wind turbine 21 is opposite to the main wind turbine 11 and has a different axis. The rated power of the auxiliary generator unit 2 is less than 20% of the rated power of the main generator unit 1.

[0033] The wind turbine tower 6 has an adjustable support 61 rotatably connected to it, and the combined support 3 is fixedly connected to the adjustable support 61.

[0034] In this technical solution, the wind turbine tower 6 is fixed to the foundation of the structure. The rotation and pitch of the combined nacelle 60 are controlled by the adjustable support 61, so that the main wind turbine 11 on it is kept in the windward position during operation. The main wind turbine 11 and the auxiliary wind turbine 21 are connected to the main generator set 1 and the auxiliary generator set 2, respectively. By rotating under wind load, they drive the generators connected to them, converting the wind load into a mechanical load and generating electricity. The meteorological measurement device 5 receives wind field data and transmits the signal to the data acquisition and transmission equipment 71 inside the combined nacelle 60 or directly to the control station of the wind farm, as the wind power data. The power generation and power output prediction data are used to predict the power generation of the wind farm. The power generation of the entire wind farm is mainly provided by the main generator unit 1 of each wind power prediction device. The auxiliary generator unit 2 supplies power to the various electrical equipment in the combined nacelle 60 and other electrical equipment in the wind farm. It also provides supplementary power when the power generation of the main generator unit 1 is insufficient per unit time. The rated power of the auxiliary generator unit 2 is about 20% of the rated power of the main generator unit 1, and the swept area of ​​the auxiliary wind rotor 21 is 20%-30% of the swept area of ​​the main wind rotor 11. It can still output stably when the power of the main generator unit 1 is reduced due to insufficient wind volume.

[0035] In this technical solution, the main generator unit 1 has a larger rated power and serves as the only power supply device in the entire wind farm for wind farm power generation prediction. The auxiliary generator unit 2 has a smaller power but can maintain a stable power output even in unstable wind environments. When the overall power generation of the wind farm is normal, the auxiliary generator unit 2 only supplies power to equipment with lower power consumption within the wind farm. When a sudden change in wind force causes the main generator unit 1 to fail to output the power generation predicted in the original ultra-short term, the auxiliary generator unit 2, which maintains a relatively stable power output, not only supplies power to the equipment but also makes up for the power generation prediction error within that unit of time period. This makes the short-term power generation prediction of the wind farm accurate. Furthermore, the configuration of one main and one auxiliary generator ensures that the main generator unit 1, which may be affected by weather changes and thus have a larger power generation error, only performs the task of supplying power to the grid, while the auxiliary generator unit 2, which is less affected by weather changes, can flexibly participate in various tasks of the wind farm.

[0036] In another technical solution, the net length, width, and height of the first compartment 601 are all greater than those of the second compartment 602. The first platform 31 extends axially throughout the first compartment 601, and the distance between the first platform 31 and the side walls of the engine room cover 600 is more than 1000mm. The first compartment 601 houses an electrical control cabinet 72 and a data acquisition and transmission device 71, whose signals are connected to the main server 8. The first compartment 601 and the second compartment 602 are interconnected. Since the space required for the auxiliary generator unit 2 is much smaller than that for the main generator unit 1, the second compartment 602... The space should be as small as possible. In addition to accommodating the main generator unit 1, the first compartment 601 should also have maintenance space on both sides to accommodate electrical equipment. Optionally, the electrical control cabinet 72 and the data acquisition and transmission equipment 71 can also be placed at the bottom of the wind turbine tower 6. The data acquisition and transmission equipment 71 has preliminary data processing and storage functions. The main server 8 can receive signals from all data acquisition and transmission equipment 71 in the wind farm in real time. The main server 8 has corresponding calculation software. By receiving weather forecasts and data from the prediction devices of each wind turbine in the wind farm, it processes the data to obtain the short-term and ultra-short-term predicted power generation of the wind farm.

[0037] In another technical solution, a wind-cooled cooling device 4 is installed in the second compartment. The wind-cooled cooling device 4 is powered by the auxiliary generator set 2. The air inlet of the wind-cooled cooling device 4 is located outside the second compartment 602 and is connected to each heat-generating component in the combined engine room 60 through the air duct, so as to dissipate heat from each heat-generating component by means of cold airflow.

[0038] In another technical solution, the meteorological measuring device 5 is used to collect parameters such as wind speed, wind direction, temperature, humidity and air pressure and transmit them to the data acquisition and transmission device 71. The data acquisition and transmission device 71 processes and stores the various types of data obtained.

[0039] In another technical solution, the main generator set 1 is a doubly-fed induction generator set. The main generator set 1 includes a first slow-speed shaft 12, which is connected to the main wind turbine 11 by a bearing. The first slow-speed shaft 12 is connected in sequence to the first compartment 601 by a first gearbox 13, a first high-speed shaft 14 and a main generator 15. The auxiliary generator set 2 is a doubly-fed induction generator set. The auxiliary generator set includes a second slow-speed shaft 22, which is connected to the auxiliary wind turbine 21 by a bearing. The auxiliary shaft is connected in sequence to the second compartment 602 by a second gearbox 23, a second high-speed shaft 24 and an auxiliary generator 25. Optionally, the main generator set 1 and the auxiliary generator set 2 can be direct-drive or semi-direct-drive generator sets.

[0040] In another technical solution, the combined support 3 is made of light steel profiles. The light steel profiles, together with the reinforcement measures of the gusset plates in the key load-bearing parts, can fix the main generator set 1 while supporting the auxiliary generator set 2 and other equipment in the second compartment 602.

[0041] In another technical solution, the wind power forecasting device is used as follows:

[0042] S1. The data acquisition controller 71 of each wind power forecasting device sends the historical data to the main server 8 for aggregation. The main server connects to the network 8 to obtain historical wind field meteorological data and real-time meteorological data.

[0043] S2. The main server 8 performs short-term power prediction for the main generator unit 1 of each wind power prediction device for the next 0-72 hours, thereby obtaining the short-term predicted power generation of the entire wind farm and reporting it. The short-term predicted power generation is then broken down into several ultra-short-term predicted power generation units every 15 minutes.

[0044] S3. After the power generation plan is executed, the power of each main generator unit is monitored at all times, and the power generation of the main generator unit is statistically analyzed every 15 minutes. If the real-time power generation of the main generator unit is less than the corresponding ultra-short-term predicted power generation for that time period, the power generation deficit is made up by allocating each auxiliary generator unit in the next 15-minute time period. If the power generation of the main generator unit is greater than the ultra-short-term predicted power generation, the power generation is reduced by adjusting the number of main generator units and auxiliary generator units working in the next 15-minute time period.

[0045] S4. Repeat step S3 in 15-minute intervals to achieve the goal of accurately predicting short-term power generation.

[0046] In the above technical solution, the data acquisition and wind power generation prediction in steps S1 and S2 can be processed by existing wind power prediction software. In step S3, if in a certain 15-minute T N When the main generator unit 1 fails to generate the corresponding ultra-short-term forecast value within a certain time period, calculate T. N The period of time was short of power generation, and in the immediately following T N+1 During the time period, auxiliary generator unit 2 or all of auxiliary generator units 2 are connected to meet the power generation compensation requirements. When T N+1 Recalculate T after the time period is completed. N -T N+1 The total power generation over the time period is calculated, and the above process is repeated. If T N If the power generation of main generator unit 1 exceeds the corresponding ultra-short-term forecast value within a certain time period, then in T... N+1 Within a given time period, referencing the ultra-short-term forecast power generation for that period, appropriately decouple the corresponding number of main generator units 1, and then at T N+2 Connect the main generator unit 1 that was disconnected before connection, and calculate T. N -T N+1To minimize the error in power generation, the above steps are repeated to maximize the accuracy of the reported short-term power generation forecasts for wind farms.

[0047] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A method for using a wind power forecasting device, wherein the wind power forecasting device comprises; A modular nacelle includes a modular support frame, which includes a first frame. Multiple frame columns are mounted on the first frame, and a second frame is connected to the middle of all the frame columns. The bottom of the first frame is connected to the nacelle floor plate, which is covered by a nacelle cover. The space between the first frame and the second frame, which is enclosed by the nacelle cover, is the first compartment. The space above the second frame, which is enclosed by the nacelle cover, is the second compartment. Meteorological measuring devices are installed in the second compartment. The main generator unit is located in the first compartment and installed on the first frame, and is connected to the main wind turbine outside the combined nacelle. An auxiliary generator set is located in the second compartment and installed on the second frame. It has an auxiliary wind turbine connected to the outside of the combined nacelle. The auxiliary wind turbine is opposite to the main wind turbine and has a different axis. The rated power of the auxiliary generator set is less than 20% of the rated power of the main generator set. A wind turbine tower, on which an adjustable support platform is rotatably connected, and the combined support is fixedly connected to the adjustable support platform; The method of use is characterized by comprising the following steps: S1. The data acquisition controllers of each wind power forecasting device send historical data to the central server for aggregation. The central server connects to the network to obtain historical wind field meteorological data and real-time meteorological data. S2. The main server performs short-term power prediction for the main generator units of each wind power prediction device for the next 0-72 hours, thereby obtaining the short-term predicted power generation of the entire wind farm and reporting it. The short-term predicted power generation is then broken down into several ultra-short-term predicted power generation units, with each unit being 15 minutes. S3. After the power generation plan is executed, the power of each main generator unit is monitored at all times, and the power generation of the main generator unit is statistically analyzed every 15 minutes. If the real-time power generation of the main generator unit is less than the corresponding ultra-short-term predicted power generation for that time period, the power generation deficit is made up by allocating each auxiliary generator unit in the next 15-minute time period. If the power generation of the main generator unit is greater than the ultra-short-term predicted power generation, the power generation is reduced by adjusting the number of main generator units and auxiliary generator units working in the next 15-minute time period. S4. Repeat step S3 in 15-minute intervals to accurately achieve the reported short-term power generation forecast.

2. The method of using the wind power forecasting device as described in claim 1, characterized in that, The first compartment has a larger net length, width, and height than the second compartment. The first platform extends axially throughout the first compartment. The distance between the first platform and the two side walls of the nacelle is more than 1000mm. The first compartment houses an electrical control cabinet and data acquisition and transmission equipment, whose signals are connected to the main server.

3. The method of using the wind power forecasting device as described in claim 1, characterized in that, The second compartment is equipped with an air-cooled cooling device, which is powered by the auxiliary generator set.

4. The method of using the wind power forecasting device as described in claim 1, characterized in that, The meteorological measuring device is used to collect parameters such as wind speed, wind direction, temperature, humidity, and air pressure and transmit them to the data acquisition and transmission equipment. The data acquisition and transmission equipment processes and stores the various types of data obtained.

5. The method of using the wind power forecasting device as described in claim 1, characterized in that, The main generator set is a doubly-fed induction generator set. The main generator set includes a first slow-speed shaft connected to the main wind turbine bearing. The first slow-speed shaft is sequentially connected to a first gearbox, a first high-speed shaft, and the main generator in a first compartment. The auxiliary generator set is also a doubly-fed induction generator set. The auxiliary generator set includes a second slow-speed shaft connected to the auxiliary wind turbine bearing. The second slow-speed shaft is sequentially connected to a second gearbox, a second high-speed shaft, and the auxiliary generator in a second compartment.

6. The method of using the wind power forecasting device as described in claim 1, characterized in that, The combined support frame is made of light steel profiles.

Images