Wind tunnel simulation experiment device and method for adding small fans to large fan room

Abstract

The present application discloses a wind tunnel simulation experimental device and method for adding small wind turbines between large wind turbines, comprising: a direct current suction wind tunnel, wherein the direct current suction wind tunnel comprises an air intake section, a power section, an experimental section and an air outlet section which are connected to each other, wherein the air intake section is provided with an air inlet, the air outlet section is provided with an exhaust port, and the power section is provided with a wind tunnel motor and a wind tunnel fan; wherein a large wind turbine model and a large wind turbine model dynamometer are provided in the experimental section, and several rows of small wind turbine model groups are provided between the large wind turbine model and the large wind turbine model dynamometer, and each row of the small wind turbine model groups comprises several small wind turbine models; the present application is used to simulate the improvement of wind energy utilization efficiency by adding small wind turbines between large wind turbines in newly built wind farms and existing wind farms. Compared with the existing numerical simulation, the simulation process of the present application is closer to the real natural state, and the simulation results are more accurate and reliable, which can better provide technical support for micro-site selection decisions of wind farms.

Description

Technical Field

[0001] The present application belongs to the technical field of micro-site selection for wind power generation, and in particular, relates to a wind tunnel experiment simulation method for simulating a newly built wind farm or an existing wind farm by adding small wind turbines between large wind turbines to study wind energy utilization efficiency and output power. Background Art

[0002] In the future, my country's clean energy represented by wind power will usher in an explosive growth stage, which will greatly improve my country's power development structure and reduce the total carbon emissions. At the same time, it also faces difficulties such as the shortage of wind energy resources. my country's wind power construction has gone through more than 30 years of history, especially the great development that began in 2008, so that my country's high-quality land wind power resources have basically been selected and built, which brings difficulties and uncertainties to the subsequent development of onshore wind power in my country.

[0003] Adding small wind turbines between large wind turbines to increase the overall installed capacity and wind energy utilization of wind farms, thereby increasing the overall output power of wind farms, is a good way to solve the current problem of lack of high-quality wind power resources for onshore wind power. At present, research on this method is still in its infancy at home and abroad, and the research method is usually numerical simulation. In order to obtain numerical solutions, the basic equations in the model are simplified to a certain extent, and the simulation results have large errors and can only be used for reference. At present, there is no ideal method to accurately simulate the impact of adding small wind turbines between large wind turbines on the output power of wind farms. Summary of the invention

[0004] In view of the above problems, the embodiment of the present application provides a wind tunnel simulation experimental device and method for adding a small wind turbine to a large wind turbine room, which can avoid the problem of large errors caused by traditional numerical simulation. The technical solution is as follows:

[0005] The first aspect of the present application provides a wind tunnel simulation experimental device for adding small wind turbines between large wind turbines, including: a DC suction wind tunnel, the DC suction wind tunnel includes an air intake section, a power section, an experimental section and an air outlet section that are connected, the air intake section is provided with an air inlet, the air outlet section is provided with an exhaust port, and the power section is provided with a wind tunnel motor and a wind tunnel fan; wherein, a large wind turbine model and a large wind turbine model dynamometer are provided in the experimental section, and several rows of small wind turbine model groups are provided between the large wind turbine model and the large wind turbine model dynamometer, and each row of the small wind turbine model groups includes several small wind turbine models. According to the above embodiment, the present application uses a DC suction boundary layer wind tunnel to simulate the effect of adding small wind turbines between large wind turbines on the output power of a wind farm. Since the interaction between the wakes of different wind turbines in an actual wind farm is truly reproduced in the DC suction wind tunnel, the simulation results are more accurate and reliable compared with existing numerical simulations.

[0006] For example, in a wind tunnel simulation experimental device for adding a small fan to the large fan room provided in one embodiment, the airflow in the DC suction wind tunnel passes through the experimental section and drives the large fan model to rotate. The large fan model is located upstream of the experimental section, and the large fan model dynamometer is located downstream of the experimental section.

[0007] For example, in a wind tunnel simulation experimental device for adding small fans between large fans provided in one embodiment, several fan speed counters are also provided in the experimental section, and each of the fan speed counters is respectively connected to each row of the small fan model group and the large fan model in a one-to-one correspondence to respectively measure the speed of each row of the small fan model group and the large fan model.

[0008] For example, in a wind tunnel simulation experimental device for adding a small fan to the large fan room provided in one embodiment, the experimental section also includes a control room, in which are provided a plurality of control motors connected one-to-one with the large fan model and the rows of small fan model groups to control the rotational speed of the large fan model and each row of the small fan model groups.

[0009] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to the large wind turbine room provided in one embodiment, a dynamometer controller and a dynamometer display and memory are also provided in the control room, the dynamometer controller is electrically connected to the large wind turbine model dynamometer, and the dynamometer display and memory is electrically connected to the large wind turbine model dynamometer.

[0010] For example, in a wind tunnel simulation experimental device for adding small fans between large fans provided in one embodiment, four rows of small fan model groups are arranged between the large fan model and the large fan model dynamometer, and each row of the small fan model group includes three small fan models.

[0011] For example, in a wind tunnel simulation experimental device for adding small fans between large fans provided in one embodiment, the distance between the large fan model and the large fan model dynamometer is 8-10 times the blade diameter of the large fan model, and four rows of small fan model groups are evenly spaced between the large fan model and the large fan model dynamometer, and each row of the small fan model groups contains three small fan models, and the four rows of small fan model groups are respectively a first small fan model group, a second small fan model group, a third small fan model group and a fourth small fan model group.

[0012] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, the large wind turbine model and the large wind turbine model dynamometer are both three-blade horizontal axis wind turbines.

[0013] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, the control motor is a 36V motor, the large wind turbine model is a 1.5MW wind turbine model, and the small wind turbine model is a 300KW wind turbine model.

[0014] A second aspect of the present application provides a wind tunnel simulation experiment method for adding a small wind turbine to a large wind turbine room, using the wind tunnel simulation experiment device for adding a small wind turbine to a large wind turbine room as described above, specifically comprising the following steps:

[0015] Step 1: start the control power switch of the DC suction wind tunnel, start the wind tunnel motor and the wind tunnel fan, gradually increase the speed of the wind tunnel motor and the wind tunnel fan so that the wind speed in the DC suction wind tunnel reaches 9m / s; turn on the fan speed counter corresponding to the large fan model, start the large fan model, and increase the speed to 950 rpm;

[0016] Step 2: Start the large wind turbine model dynamometer, start the dynamometer controller, gradually increase the load of the large wind turbine model dynamometer, increase the blade rotation resistance, and then measure the output power of the large wind turbine model dynamometer. The data is stored in the dynamometer display and memory. The wind turbine power generation power A of the large wind turbine model at the location of the large wind turbine model dynamometer is calculated according to the stored data.

[0017] Step 3: Turn off the large fan model dynamometer, turn off the large fan model, turn off the fan speed counter corresponding to the large fan model, gradually turn off the wind tunnel motor and the wind tunnel fan, and turn off the wind tunnel control power switch of the DC suction wind tunnel;

[0018] Step 4: start the wind tunnel control power switch of the DC suction wind tunnel, start the wind tunnel motor and the wind tunnel fan, gradually increase the speed of the wind tunnel motor and the wind tunnel fan so that the wind speed in the DC suction wind tunnel reaches 9m / s; turn on the fan speed counter corresponding to the large fan model, start the large fan model, and increase the speed to 950 rpm;

[0019] Step 5: Turn on the fan speed counter corresponding to each row of the small fan model group, start each row of the small fan model group and increase the speed of the small fan model to 3200 rpm;

[0020] Step 6: Start the large wind turbine model dynamometer, start the dynamometer controller, gradually increase the load of the large wind turbine model dynamometer, measure the output power of the large wind turbine model dynamometer after increasing the blade rotation resistance, store the data in the dynamometer display and memory, and calculate the power generation power B of the large wind turbine model 8 at the location of the large wind turbine model dynamometer according to the stored data;

[0021] Step 7: turn off the large fan model dynamometer, turn off the dynamometer controller, turn off the large fan model, turn off the fan speed counter connected to the large fan model, turn off each row of the small fan model groups, turn off the fan speed counter connected to each row of the small fan model groups in a one-to-one correspondence, gradually turn off the wind tunnel motor and the wind tunnel fan, and turn off the wind tunnel control power switch of the DC suction wind tunnel;

[0022] Step 8: Compare and analyze the power generation A of the large wind turbine model 8 measured in step 2 and the power generation B of the large wind turbine model measured in step 6, as well as the overall change of the power generation B fitting curve relative to the power generation A fitting curve, and determine the impact of adding a small wind turbine between large wind turbines on the power generation output power of the downstream large wind turbines;

[0023] Step nine: Repeat steps one to eight to obtain the power generation A and the power generation B three times, and compare and analyze the values ​​and fitting curves of the power generation A and the power generation B three times to comprehensively judge the impact of adding a small wind turbine between large wind turbines on the power generation output power of the downstream large wind turbines.

[0024] The beneficial effects brought about by a wind tunnel simulation experimental device and method for adding small wind turbines between large wind turbines provided in some embodiments of the present application are as follows: the present application is used to simulate the improvement of wind energy utilization efficiency by adding small wind turbines between large wind turbines in newly built wind farms and existing wind farms. Compared with existing numerical simulations, the simulation process of the present application is closer to the real natural state, and the simulation results are more accurate and reliable, which can better provide technical support for micro-site selection decisions of wind farms. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the DC suction wind tunnel of the present application;

[0027] Figure 2 It is a schematic diagram of the experimental section structure of the DC suction wind tunnel of the present application.

[0028] Figure markings: 1-DC suction wind tunnel, 2-air inlet, 3-wind tunnel motor, 4-wind tunnel fan, 5-experimental section, 6-exhaust port, 7-control room, 8-large fan model, 9-first small fan model group, 10-second small fan model group, 11-third small fan model group, 12-fourth small fan model group, 13-large fan model dynamometer, 14-fan speed counter, 15-control motor, 16-dynamometer controller, 17-dynamometer display and memory. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] According to an embodiment of the present invention, a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room is provided. Figure 1As shown, it includes: a DC suction wind tunnel 1, the DC suction wind tunnel 1 includes an air intake section, a power section, an experimental section 5 and an air outlet section which are connected to each other, the air intake section is provided with an air inlet 2, the air outlet section is provided with an exhaust port 6, the power section is provided with a wind tunnel motor 3 and a wind tunnel fan 4; wherein, a large fan model 8 and a large fan model dynamometer 13 are provided in the experimental section 5, and several rows of small fan model groups are provided between the large fan model 8 and the large fan model dynamometer 13, and each row of the small fan model groups includes several small fan models. Specifically, a wooden chassis is provided in the experimental section 5, and the large wind turbine model 8 and the large wind turbine model dynamometer 13 are both fixed to the wooden chassis of the experimental section 5 by screws, and the wooden chassis is fixed to the bottom plate of the DC suction wind tunnel 1 by steel nails; the size of the experimental section 5 of the DC suction wind tunnel 1 is 20m (length) × 4m (width) × 2.5m (height), and the wind speed range is adjustable within 0-25m / s. According to the similarity criterion requirements, the simulated experimental wind speed of this application is 9m / s. According to the above embodiment, this application uses a DC suction boundary layer wind tunnel to simulate the impact of adding small wind turbines between large wind turbines on the output power of the wind farm. Since the interaction between the wakes of different wind turbines in the actual wind farm is truly reproduced in the DC suction wind tunnel 1, compared with the existing numerical simulation, the simulation results are more accurate and reliable.

[0032] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, Figure 2 As shown, the airflow in the DC suction wind tunnel 1 passes through the experimental section and drives the large fan model 8 to rotate. The large fan model 8 is located upstream of the experimental section, and the large fan model dynamometer 13 is located downstream of the experimental section.

[0033] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, Figure 2 As shown, several fan speed counters 14 are also provided in the experimental section, and each of the fan speed counters 14 is connected to each row of the small fan model group and the large fan model 8 in a one-to-one correspondence, so as to respectively measure the speed of each row of the small fan model group and the large fan model 8. Specifically, one fan speed counter 14 is arranged in each row of the small fan model group to measure the speed of the small fan model group in the row.

[0034] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, Figure 2As shown, the experimental section also includes a control room 7, in which a number of control motors 15 are provided, which are connected one-to-one with the large fan model 8 and the rows of small fan model groups, so as to control the rotation speed of the large fan model 8 and each row of the small fan model groups. Specifically, the large fan model 8 is connected to the corresponding control motor 15 in the control room 7 via a cable, and the rotation speed of each row of the small fan model group is controlled by a control motor 15 to meet the rated operating speed requirements. According to the above embodiment, the uniform airflow movement in the DC suction wind tunnel 1 drives the blades of the large fan model 8 to rotate. When the wind speed does not reach the fan speed that meets the tip speed ratio similarity requirements required for the experimental simulation, the rotation speed of the large fan model 8 is further increased by the control motor 15 until the experimental requirements are met.

[0035] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, Figure 2 As shown, a dynamometer controller 16 and a dynamometer display and memory 17 are also provided in the control room 7. The dynamometer controller 16 is electrically connected to the large wind turbine model dynamometer 13, and the dynamometer display and memory 17 is electrically connected to the large wind turbine model dynamometer 13. Specifically, the host of the large wind turbine model dynamometer 13 is connected to the external dynamometer controller 16 in the control room 7 through a cable, and is connected to the external dynamometer display and memory 17 in the control room 7 through a data line.

[0036] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, Figure 2 As shown, four rows of small fan model groups are arranged between the large fan model 8 and the large fan model dynamometer 13, and each row of the small fan model group includes three small fan models. Specifically, the structures, models and specifications of the 12 small fan models are all consistent, the blade diameter is 355mm, the tower height is set to 300mm, 500mm, and 700mm respectively in different experimental stages, and the motor power is 800W.

[0037] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, Figure 2As shown, the spacing between the large fan model 8 and the large fan model dynamometer 13 is 8-10 times the blade diameter of the large fan model 8, and four rows of small fan model groups are evenly spaced between the large fan model 8 and the large fan model dynamometer 13, and each row of the small fan model group contains three small fan models, and the four rows of small fan model groups are respectively a first small fan model group 9, a second small fan model group 10, a third small fan model group 11 and a fourth small fan model group 12. Specifically, the large fan model 8 is arranged 10m upstream of the experimental section 5, the first small fan model group 9 is arranged 2m downstream of the large fan model 8, the second small fan model group 10, the third small fan model group 11 and the fourth small fan model group 12 are all spaced 1.7m apart, the large fan model dynamometer 13 is arranged at the most downstream of the experimental section 5, and the large fan model dynamometer 13 is spaced 1.9m apart from the fourth small fan model group 12. Overall, the distance between the large fan model 8 and the large fan model dynamometer 13 is 9m, which is close to 9 times the distance between the blades of the large fan model 8, wherein the blade diameter of the large fan model 8 is 1050mm.

[0038] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, Figure 2 As shown, the large fan model 8 and the large fan model dynamometer 13 are both three-blade horizontal axis fans. Specifically, the blades of the large fan model 8 and the large fan model dynamometer 13 are designed to be consistent, the blade diameter of the large fan model 8 is 1050mm, the tower height is 1200mm, the motor power is 1800W, the blade material of the large fan model 8 and the 12 small fan models is ABS, and the tower material is stainless steel.

[0039] For example, in a wind tunnel simulation experimental device for adding a small wind turbine to a large wind turbine room provided in one embodiment, the control motor 15 is a 36V motor, the large wind turbine model 15 is a 1.5MW wind turbine model, and the small wind turbine model is a 300KW wind turbine model.

[0040] A second aspect of the present application provides a wind tunnel simulation experiment method for adding a small wind turbine to a large wind turbine room, using the wind tunnel simulation experiment device for adding a small wind turbine to a large wind turbine room as described above, specifically comprising the following steps:

[0041] Step 1: Start the control power switch of the DC suction wind tunnel 1, start the wind tunnel motor 3 and the wind tunnel fan 4, and gradually increase the speed of the wind tunnel motor 3 and the wind tunnel fan 4 so that the wind speed in the DC suction wind tunnel 1 reaches 9m / s; turn on the fan speed counter 15 corresponding to the large fan model 8, start the large fan model 8, and increase the speed to 950 rpm;

[0042] Step 2: Start the large wind turbine model dynamometer 13, start the dynamometer controller 16, gradually increase the load of the large wind turbine model dynamometer 13, measure the output power of the large wind turbine model dynamometer 13 after increasing the blade rotation resistance, store the data in the dynamometer display and memory 17, and calculate the wind turbine power generation A of the large wind turbine model 8 at the location of the large wind turbine model dynamometer 13 according to the stored data;

[0043] Step 3: Turn off the large fan model dynamometer 13, turn off the large fan model 8, turn off the fan speed counter 15 corresponding to the large fan model 8, gradually turn off the wind tunnel motor 3 and the wind tunnel fan 4, and turn off the wind tunnel control power switch of the DC suction wind tunnel 1;

[0044] Step 4: start the wind tunnel control power switch of the DC suction wind tunnel 1, start the wind tunnel motor 3 and the wind tunnel fan 4, gradually increase the speed of the wind tunnel motor 3 and the wind tunnel fan 4 so that the wind speed in the DC suction wind tunnel 1 reaches 9m / s; turn on the fan speed counter 15 corresponding to the large fan model 8, start the large fan model 8, and increase the speed to 950 rpm;

[0045] Step 5: Turn on the fan speed counter 15 corresponding to each row of the small fan model group, start each row of the small fan model group and increase the speed of the small fan model to 3200 rpm;

[0046] Step 6: Start the large wind turbine model dynamometer 13, start the dynamometer controller 16, gradually increase the load of the large wind turbine model dynamometer 13, measure the output power of the large wind turbine model dynamometer 13 after increasing the blade rotation resistance, store the data in the dynamometer display and memory 17, and calculate the power generation power B of the large wind turbine model 8 at the location of the large wind turbine model dynamometer 13 according to the stored data;

[0047] Step 7: turn off the large fan model dynamometer 13, turn off the dynamometer controller 16, turn off the large fan model 8, turn off the fan speed counter 15 corresponding to the large fan model 8, turn off each row of the small fan model groups, turn off the fan speed counter 15 corresponding to each row of the small fan model groups, gradually turn off the wind tunnel motor 3 and the wind tunnel fan 4, and turn off the wind tunnel control power switch of the DC suction wind tunnel 1;

[0048] Step 8: Compare and analyze the power generation A of the large wind turbine model 8 measured in the step 2 and the power generation B of the large wind turbine model 8 measured in the step 6, as well as the overall change of the power generation B fitting curve relative to the power generation A fitting curve, and determine the impact of adding a small wind turbine between large wind turbines on the power generation output power of the downstream large wind turbines;

[0049] Step nine: Repeat steps one to eight to obtain the power generation A and the power generation B three times, and compare and analyze the values ​​and fitting curves of the power generation A and the power generation B three times to comprehensively judge the impact of adding a small wind turbine between large wind turbines on the power generation output power of the downstream large wind turbines.

[0050] In summary, the wind tunnel simulation experimental device and method for adding small wind turbines between large wind turbines in the present application are used to simulate the improvement of wind energy utilization efficiency by adding small wind turbines between large wind turbines in newly built wind farms and existing wind farms. Compared with the existing numerical simulation, the simulation process of the present application is closer to the real natural state, and the simulation results are more accurate and reliable, which can better provide technical support for the micro-site selection decision of wind farms.

[0051] Although the embodiments of the present application have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

1. A wind tunnel simulation experimental device for adding small fans to a large fan room, characterized in that: include: A direct current suction type wind tunnel, the direct current suction type wind tunnel comprises an air intake section, a power section, an experimental section and an air outlet section which are connected to each other, the air intake section is provided with an air intake port, the air outlet section is provided with an exhaust port, the power section is provided with a wind tunnel motor and a wind tunnel fan; wherein, a large fan model and a large fan model dynamometer are provided in the experimental section, several rows of small fan model groups are provided between the large fan model and the large fan model dynamometer, and each row of the small fan model groups comprises several small fan models, the airflow in the direct current suction type wind tunnel passes through the experimental section and drives the large fan model to rotate, the large fan model is located upstream of the experimental section, the large fan model dynamometer is located downstream of the experimental section, several fan speed counters are also provided in the experimental section, and each of the fan speed counters is respectively connected to each row of the small fan model group and the large fan model in a one-to-one correspondence, so as to respectively measure the speed of each row of the small fan model group and the large fan model.

2. The wind tunnel simulation experimental device for adding small wind turbines to a large wind turbine room according to claim 1 is characterized in that: The experimental section also includes a control room, in which are provided a plurality of control motors connected one-to-one with the large fan model and the rows of small fan model groups to control the rotation speed of the large fan model and each row of the small fan model groups.

3. The wind tunnel simulation experimental device for adding small wind turbines to a large wind turbine room according to claim 2 is characterized in that: A dynamometer controller and a dynamometer display and memory are also provided in the control room. The dynamometer controller is electrically connected to the large wind turbine model dynamometer, and the dynamometer display and memory is electrically connected to the large wind turbine model dynamometer.

4. The wind tunnel simulation experimental device for adding small wind turbines to a large wind turbine room according to claim 1 is characterized in that: Four rows of small fan model groups are arranged between the large fan model and the large fan model dynamometer, and each row of the small fan model group includes three small fan models.

5. The wind tunnel simulation experimental device for adding small wind turbines to a large wind turbine room according to claim 4 is characterized in that: The distance between the large fan model and the large fan model dynamometer is 8-10 times the blade diameter of the large fan model, and four rows of small fan model groups are evenly spaced between the large fan model and the large fan model dynamometer, and each row of the small fan model groups contains three small fan models, and the four rows of small fan model groups are respectively a first small fan model group, a second small fan model group, a third small fan model group and a fourth small fan model group.

6. The wind tunnel simulation experimental device for adding small wind turbines to a large wind turbine room according to claim 1 is characterized in that: The large fan model and the large fan model dynamometer are both three-blade horizontal axis fans.

7. The wind tunnel simulation experimental device for adding small wind turbines to a large wind turbine room according to claim 2 is characterized in that: The control motor is a 36V motor, the large wind turbine model is a 1.5MW wind turbine model, and the small wind turbine model is a 300KW wind turbine model.

8. A wind tunnel simulation test method for adding a small wind turbine to a large wind turbine room, characterized in that: The wind tunnel simulation experimental device for adding small wind turbines to a large wind turbine room according to any one of claims 1 to 7 specifically comprises the following steps: Step 1: start the control power switch of the DC suction wind tunnel, start the wind tunnel motor and the wind tunnel fan, gradually increase the speed of the wind tunnel motor and the wind tunnel fan so that the wind speed in the DC suction wind tunnel reaches 9m / s; turn on the fan speed counter corresponding to the large fan model, start the large fan model, and increase the speed to 950 rpm; Step 2: Start the large wind turbine model dynamometer, start the dynamometer controller, gradually increase the load of the large wind turbine model dynamometer, increase the blade rotation resistance, and then measure the output power of the large wind turbine model dynamometer. The data is stored in the dynamometer display and memory. The wind turbine power generation power A of the large wind turbine model at the location of the large wind turbine model dynamometer is calculated according to the stored data. Step 3: Turn off the large fan model dynamometer, turn off the large fan model, turn off the fan speed counter corresponding to the large fan model, gradually turn off the wind tunnel motor and the wind tunnel fan, and turn off the wind tunnel control power switch of the DC suction wind tunnel; Step 4: start the wind tunnel control power switch of the DC suction wind tunnel, start the wind tunnel motor and the wind tunnel fan, gradually increase the speed of the wind tunnel motor and the wind tunnel fan so that the wind speed in the DC suction wind tunnel reaches 9m / s; turn on the fan speed counter corresponding to the large fan model, start the large fan model, and increase the speed to 950 rpm; Step 5: Turn on the fan speed counter corresponding to each row of the small fan model group, start each row of the small fan model group and increase the speed of the small fan model to 3200 rpm; Step 6: Start the large wind turbine model dynamometer, start the dynamometer controller, gradually increase the load of the large wind turbine model dynamometer, measure the output power of the large wind turbine model dynamometer after increasing the blade rotation resistance, store the data in the dynamometer display and memory, and calculate the power generation power B of the large wind turbine model at the location of the large wind turbine model dynamometer according to the stored data; Step 7: turn off the large fan model dynamometer, turn off the dynamometer controller, turn off the large fan model, turn off the fan speed counter connected to the large fan model, turn off each row of the small fan model groups, turn off the fan speed counter connected to each row of the small fan model groups in a one-to-one correspondence, gradually turn off the wind tunnel motor and the wind tunnel fan, and turn off the wind tunnel control power switch of the DC suction wind tunnel; Step 8: Compare and analyze the power generation A of the large wind turbine model measured in step 2 and the power generation B of the large wind turbine model measured in step 6, as well as the overall change of the power generation B fitting curve relative to the power generation A fitting curve, and determine the impact of adding a small wind turbine between large wind turbines on the power generation output power of the downstream large wind turbines; Step 9: Repeat steps 1 to 8 to obtain the generated power A and the The power generation power B is obtained by comparing and analyzing the values ​​and fitting curves of the power generation power A and the power generation power B for three times, and comprehensively judging the influence of adding a small wind turbine between large wind turbines on the power generation output power of the downstream large wind turbines.

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