A micro wind turbine integrated wind-solar complementary power generation system based on a photovoltaic support

Abstract

The utility model relates to a micro wind driven generator integrated wind-solar complementary power generation system based on photovoltaic support. The wind-solar complementary power generation system comprises a photovoltaic array, an inverter, a micro wind driven generator set and an energy storage battery, the photovoltaic array comprises photovoltaic components and photovoltaic supports, the photovoltaic components are connected in series through DC cables and are connected to the MPPT port of the inverter, the inverter is fixed on the side upright column of the photovoltaic support, the outgoing line of the inverter is connected to the power grid, and the photovoltaic DC power is converted into AC power to be connected to the power grid; the micro wind driven generator set comprises an impeller and a micro wind driven generator, the impeller is installed in the middle of the front upright column of the photovoltaic support, the micro wind driven generator is installed on the shaft end of the impeller outside the upright column, and the outgoing line cable of the micro wind driven generator set is merged into the outgoing line end of the inverter. The utility model makes full use of the idle space of the photovoltaic support to install the micro wind driven generator, and realizes the reasonable layout of the solar energy and the wind energy power generation equipment in space.

Description

Technical Field

[0001] This utility model relates to the field of solar power generation technology, and in particular to an integrated wind-solar hybrid power generation system based on a micro wind turbine with a photovoltaic support. Background Technology

[0002] Against the backdrop of a growing global demand for clean energy, solar photovoltaic (PV) power generation and wind power generation, as important forms of renewable energy utilization, have received extensive research and application. Currently, PV power generation systems are relatively mature, mainly composed of PV support structures, solar panels, and inverters. PV support structures are used to support the solar panels, allowing them to receive sunlight at a suitable angle and convert solar energy into electricity. However, PV power generation has significant limitations; it is highly dependent on sunlight conditions. At night, on cloudy days, or when sunlight intensity is insufficient, power generation efficiency drops significantly or even stops, leading to intermittent and unstable power supply.

[0003] Wind power generation utilizes wind to drive a wind turbine, which in turn drives a generator to produce electricity. Traditional large wind turbines are typically installed in open plains, mountains, or offshore, requiring significant installation space and incurring high construction costs. Furthermore, large wind turbines have specific requirements regarding wind speed and direction; in areas with low wind speeds or unstable wind directions, their power generation efficiency is significantly affected.

[0004] To improve energy efficiency and ensure a stable energy supply, some research has begun to explore combining solar and wind power generation to create integrated wind-solar hybrid power systems based on photovoltaic brackets and micro-wind turbines. However, most existing wind-solar hybrid systems are simply combinations of large wind turbines and photovoltaic power generation systems, which have several drawbacks, as follows:

[0005] (1) Unreasonable use of space: Large wind turbines and photovoltaic power generation systems are built independently, which requires a large amount of land resources. They have the defects of complex structure and large area. With land resources becoming increasingly scarce, this layout method restricts the large-scale promotion of wind-solar hybrid systems.

[0006] (2) Mutual interference problem: The layout of wind power generation equipment and photovoltaic power generation equipment lacks reasonable planning. Wind power generation equipment may block the sunlight reception of solar panels, affecting the photovoltaic power generation efficiency; conversely, photovoltaic equipment may also interfere with the airflow around the wind turbine, reducing the wind power generation effect; the mutual interference between the two reduces their respective power generation efficiency, and cannot achieve true high-efficiency complementarity.

[0007] (3) High cost: The construction, installation and maintenance costs of large wind turbines are relatively high, which increases the investment cost of the entire wind-solar hybrid system and affects its economic feasibility to a certain extent. Utility Model Content

[0008] This invention addresses the problems existing in the prior art by providing an integrated wind-solar hybrid power generation system based on a photovoltaic bracket. This system fully utilizes the space of the photovoltaic bracket to install suitable wind power generation equipment without affecting photovoltaic power generation, thereby achieving efficient complementarity between solar and wind energy.

[0009] To achieve the above-mentioned technical objectives, this utility model discloses an integrated wind-solar hybrid power generation system based on a photovoltaic bracket. The wind-solar hybrid power generation system includes a photovoltaic array, an inverter, a micro wind turbine generator set, and an energy storage battery. The photovoltaic array includes photovoltaic modules and a photovoltaic bracket. The photovoltaic modules are fixed on the photovoltaic bracket and connected in series to the MPPT port of the inverter via DC cables. The photovoltaic modules are used to receive solar energy and generate DC power, which is then supplied to the inverter. The inverter is fixed on a side column of the photovoltaic bracket, and its output line is connected to the power grid to convert the photovoltaic DC power into AC power for grid connection. The micro wind turbine generator set includes an impeller and a micro wind turbine. The impeller is installed in the middle of the front column of the photovoltaic bracket, and the micro wind turbine generator is installed on the outside of the column at the impeller shaft end. The output cable of the micro wind turbine generator set merges into the output terminal of the inverter.

[0010] A further technical solution of this utility model: a first ammeter is installed at the inverter output terminal; the micro wind turbine generator set includes an impeller and a micro wind turbine generator, the impeller is installed in the middle of the front column of the photovoltaic support, the micro wind turbine generator is installed on the outside of the column at the impeller shaft end, the output cable of the micro wind turbine generator set merges into the inverter output line, a second ammeter is installed on the output line of the micro wind turbine generator set, and a third ammeter is installed on the line behind the point where the output line of the micro wind turbine generator set and the output line of the inverter merge.

[0011] The preferred technical solution of this utility model is as follows: the energy storage battery is fixed on the side column of the photovoltaic support, and the energy storage battery can switch between charging mode and discharging mode.

[0012] The preferred technical solution of this utility model is as follows: the impeller includes a central rotating shaft and multiple blades distributed on the central rotating shaft. The central rotating shaft is horizontally installed on the front support of the photovoltaic bracket and is parallel to the bottom edge of the photovoltaic module.

[0013] The preferred technical solution of this utility model is as follows: the first ammeter, the second ammeter, and the third ammeter are all connected to the controller via signal lines. The first ammeter is used to measure the inverter output current and transmit the current data to the controller; the second ammeter is used to measure the micro wind turbine output current and transmit the current data to the controller; the third ammeter is used to measure the current at the junction of the micro wind turbine output and the inverter output and transmit the current data to the controller; the energy storage battery is installed on the photovoltaic support, and the controller is connected to the energy storage battery via signal lines. The energy storage battery receives commands from the controller to perform charging or discharging actions.

[0014] The preferred technical solution of this utility model is as follows: the output line of the energy storage battery is connected to the output line of the micro wind turbine generator set, and a switch is installed on the line after the connection point. The switch is an electric switch and is used to receive the controller's command to perform closing or opening actions. The controller is fixed on the photovoltaic bracket. The controller controls the charging and discharging of the energy storage battery according to the preset logic, controls the switch to close or open, and compensates for the output current fluctuation of the photovoltaic array.

[0015] The control logic of the controller in this invention includes a night state and a day state;

[0016] At night: the photovoltaic array does not generate electricity, the micro wind turbine generates electricity, the switch is turned off, and the energy storage battery stores the energy generated by the micro wind turbine.

[0017] During the daytime: When the sun rises, the photovoltaic array receives solar energy, generates direct current (DC), which is then converted into alternating current (AC) by the inverter and output to the grid; when the wind blows, the micro wind turbine generates electricity and stores it in the energy storage battery; during this process, the controller monitors the output current of the first ammeter in real time and determines the output current I at any time t based on the first ammeter. 1t Compare with the data from the first ammeter to the threshold I. 1-阈值 For comparison, the first ammeter data comparison threshold I 1-阈值 For I 1t and I 1t The average of at least nine previous first ammeter data points;

[0018] When I 1t ≧I 1-阈值 The controller switches off, the energy storage battery is charged, and the current input to the grid from the photovoltaic array is not supplemented.

[0019] When I 1t <I 1-阈值 The controller closes the switch, the energy storage battery discharges, and the current input to the grid from the photovoltaic array is compensated.

[0020] The wind turbine in this invention has multiple blades with a special aerodynamic design. The turbine is connected to the central shaft of the generator. When the turbine rotates under wind power, it drives the input shaft of the generator, thus generating electricity. The micro wind turbine is mounted on a front support column via drilling. The impeller shafts on both sides of the turbine are connected to the generator. Electricity is generated through the rotation of the impeller, and then connected to energy storage and an inverter via cables. When the energy storage is fully charged, the generated electricity can be directly fed into the grid through the inverter. When sunlight is weak, the energy storage system compensates for the insufficient power generation from the photovoltaic system, ensuring the normal operation of the inverter system under low light conditions and avoiding power loss caused by the photovoltaic voltage falling below the inverter's starting value due to low light. Simultaneously, this installation method does not block the solar panels from receiving sunlight, ensuring the normal operation of photovoltaic power generation.

[0021] The electrical system of this invention includes an inverter, a battery, and a controller. The inverter converts the direct current (DC) generated by the solar panels and micro wind turbine into alternating current (AC) for grid connection or user use. The battery stores excess energy to provide continuous power to the load when solar energy is insufficient or wind is weak. The controller monitors the operating status of the solar panels and micro wind turbine in real time, including parameters such as power generation, voltage, and current, to promptly detect and address potential faults.

[0022] The beneficial effects of this utility model are:

[0023] (1) This utility model integrates a micro wind turbine into a photovoltaic support system, thereby achieving efficient complementarity between solar and wind energy. During the day when there is sufficient sunlight, the power generation mainly relies on solar panels. At night or when there is insufficient sunlight, the micro wind turbine can continue to generate electricity using wind power, which improves the overall power generation efficiency and stability of the system. The energy complementarity is highly efficient, reducing the dependence on a single energy source.

[0024] (2) This utility model installs the micro wind turbine on the support column at the bottom of the photovoltaic module, making full use of the idle space of the photovoltaic support, without occupying additional land area, and improving the energy output per unit area of ​​land. It is especially suitable for areas with limited land resources and maximizes space utilization. At the same time, it avoids blocking the sunlight of the solar panel, and the installation position of the micro wind turbine will not affect the solar panel's reception of sunlight, realizing a reasonable spatial layout of solar and wind power generation equipment. Moreover, the photovoltaic support system also provides a stable support structure for the micro wind turbine. The two are independent of each other and work together to avoid mutual interference.

[0025] (3) The special design of the wind turbine and the application of the adjustable mounting base of this utility model enable the micro wind turbine to adapt to different wind directions and wind speeds, thereby improving the efficiency and reliability of wind power generation; and the use of micro wind turbines to replace traditional large wind turbines reduces the cost of equipment procurement, installation and maintenance, and improves the economic feasibility of the entire wind-solar hybrid system. Attached Figure Description

[0026] Figure 1 This is a front structural diagram of the present invention;

[0027] Figure 2 This is a side view of the structure of this utility model;

[0028] Figure 3 This is the electrical wiring diagram for this utility model;

[0029] Figure 4 This is a comparison diagram of the system output current curves before and after compensation in an embodiment of this utility model.

[0030] In the diagram: 1. Photovoltaic array; 11. Photovoltaic module; 12. Photovoltaic support and inverter; 3. Micro wind turbine generator set; 31. Impeller; 32. Micro wind turbine generator; 4. Energy storage battery; 5. Controller; 61. First ammeter; 62. Second ammeter; 63. Third ammeter; 7. Switch. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 4 All accompanying drawings are simplified versions of embodiments and are intended solely for the purpose of clearly and concisely illustrating the embodiments of this utility model. The technical solutions shown in the drawings below are specific solutions of embodiments of this utility model and are not intended to limit the scope of the claimed utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be understood that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Example 1 provides an integrated wind-solar hybrid power generation system based on a photovoltaic bracket for a micro wind turbine, such as... Figures 1 to 3 As shown, the system includes a photovoltaic array 1 and an inverter 2. The photovoltaic array 1 includes photovoltaic modules 11 and a photovoltaic support 12. The photovoltaic modules 11 are fixed on the photovoltaic support 12 and connected in series to the MPPT port of the inverter 2 via a DC cable. The photovoltaic modules 11 are used to receive solar energy and generate DC power, which is then supplied to the inverter 2. The inverter 2 is used to convert the photovoltaic DC power into AC power for grid connection. The integrated wind-solar hybrid power generation system based on the photovoltaic support also includes a micro wind turbine generator set 3, an energy storage battery 4, and a controller 5. The inverter 2 is fixed on the side column of the photovoltaic bracket 12. The output line of the inverter 2 is connected to the power grid, and a first ammeter 61 is installed at the output end of the inverter 2. The micro wind turbine generator 3 includes an impeller 31 and a micro wind turbine generator 32. The impeller 31 is installed in the middle of the front column of the photovoltaic bracket 12, and the micro wind turbine generator 32 is installed on the outside of the column at the impeller shaft end. The output cable of the micro wind turbine generator 3 merges into the output line of the inverter 2. A second ammeter 62 is installed on the output line of the micro wind turbine generator 3, and a third ammeter 63 is installed on the line behind the point where the output line of the micro wind turbine generator 3 merges with the output line of the inverter 2. The energy storage battery 4 is fixed on the side column of the photovoltaic bracket 12. The energy storage battery 4 can switch between charging and discharging modes. The impeller 31 includes a central shaft and multiple blades distributed on the central shaft. The central shaft is horizontally installed on the front bracket of the photovoltaic bracket 12 and parallel to the bottom edge of the photovoltaic module 11.

[0034] In the embodiments, such as Figure 3 As shown, the first ammeter 61, the second ammeter 62, and the third ammeter 63 are all connected to the controller 5 via signal lines. The first ammeter 61 is used to measure the output current of the inverter 2 and transmit the current data to the controller 5; the second ammeter 62 is used to measure the output current of the micro wind turbine generator 3 and transmit the current data to the controller 5; the third ammeter 63 is used to measure the current at the junction of the output of the micro wind turbine generator 3 and the output of the inverter 2 and transmit the current data to the controller 5; the energy storage battery 4 is installed on the photovoltaic bracket 12, and the controller 5 is connected to the energy storage battery 4 via signal lines. The energy storage battery 4 receives commands from the controller 5 to perform charging or discharging actions. The output line of the energy storage battery 4 is connected to the output line of the micro wind turbine generator set 3, and a switch 7 is installed on the line after the connection point. The switch 7 is an electric switch and is used to receive instructions from the controller 5 to perform closing or opening actions. The controller 5 is fixed on the photovoltaic bracket 12. The controller 5 controls the charging and discharging of the energy storage battery 4 according to the preset logic, controls the closing or opening of the switch 7, and compensates for the output current fluctuation of the photovoltaic array 1.

[0035] The control logic of controller 5 in this embodiment of the invention includes a night state and a day state; specifically as follows:

[0036] (a) In the nighttime state: the photovoltaic array 1 does not generate electricity, the micro wind turbine generator 3 generates electricity, the switch 7 is turned off, and the energy storage battery 4 stores the generated energy of the micro wind turbine generator 3.

[0037] Inverter 2 output current ; Micro wind turbine generator set 3 output current ;

[0038] The charging current of the energy storage battery 4 is Ammeter 63 measures the combined current. .

[0039] (ii) During the daytime: When the sun rises, the photovoltaic array 1 receives solar energy and generates direct current, which is converted into alternating current by the inverter 2 and output to the power grid; when the wind blows, the micro wind turbine generator 3 generates electricity and stores it in the energy storage battery 4; during this process, the controller 5 monitors the output current of the first ammeter 61 in real time, and the first ammeter 61 measures the output current of the inverter 2. The second ammeter 62 measures the output current of the miniature wind turbine generator set 3. And based on the output current I at any time t of the first ammeter 61 1t Compare with the data from the first ammeter to the threshold I 1-阈值 For comparison, the first ammeter data comparison threshold I 1-阈值 For I 1t and I 1t The average of at least nine previous first ammeter data points;

[0040] When I 1t ≧I 1-阈值 When controller 5 controls switch 7 to open, the energy storage battery 4 is charged, and no supplement is provided to the current input to the grid from photovoltaic array 1;

[0041] When I 1t <I 1-阈值 The controller 5 controls the switch 7 to close, and the energy storage battery 4 discharges to compensate for the current input to the power grid from the photovoltaic array 1.

[0042] The specific control process is as follows:

[0043] S1. Controller 5 reads initial data:

[0044] Read the current from the first ammeter 61 every 1 second. Read the current from the second ammeter 62. ,

[0045] Record the nine data points measured by the first ammeter 61 ,

[0046] Record the nine data points measured by the second ammeter 62. ,

[0047] Record the 10th data point and proceed to step S2.

[0048] S2. Begin executing the first compensation current; after a 1-second interval,

[0049] Record the 10th data point measured by the first ammeter 61. ;

[0050] Record the 10th data point measured by the second ammeter 62. ;

[0051] Perform the calculation:

[0052]

[0053] if ,

[0054] Controller 5 controls switch 7 to open, energy storage battery 4 charges, charging current ;

[0055] The third ammeter 63 measures the convergence current. .

[0056] if ,

[0057] Controller 5 controls switch 7 to close, and the energy storage battery (4) discharges.

[0058] Discharge current ;

[0059] The third ammeter 63 measures the convergence current. .

[0060] S3. After a 1-second interval, perform the second current compensation.

[0061] Record the 11th data point measured by the first ammeter 61. ;

[0062] Record the 11th data point measured by the second ammeter 62. ;

[0063] Perform the calculation:

[0064]

[0065] if ,

[0066] Controller 5 controls switch 7 to open, energy storage battery 4 charges, charging current ;

[0067] The third ammeter 63 measures the convergence current. .

[0068] if ,

[0069] Controller 5 controls switch 7 to close, and energy storage battery 4 discharges.

[0070] Discharge current ;

[0071] The third ammeter 63 measures the convergence current. .

[0072] S4. The controller continuously reads data in real time at 1-second intervals, and updates the data for each new measurement by the first ammeter. Record the data and simultaneously calculate the comparison threshold for the first ammeter data at the same time. Perform the m-th current compensation;

[0073] Record the m-th data measured by the first ammeter 61. ;

[0074] Record the m-th data measured by the second ammeter 62. ;

[0075] Perform the calculation:

[0076]

[0077] if Controller 5 controls switch 7 to disconnect.

[0078] Energy storage battery 4 charging, charging current ;

[0079] if Controller 5 controls switch (7) to close.

[0080] Energy storage battery 4 discharges, discharge current ;

[0081] The third ammeter 63 measures the convergence current. .

[0082] S5. Repeat the process until the 1000th data entry is recorded. Then clear all data, start recording data again, and perform the calculation.

[0083] By following the steps above, the current output fluctuation of inverter 2 can be effectively reduced by controlling the charging and discharging of energy storage battery 4.

[0084] The photovoltaic bracket installation process in this embodiment is as follows:

[0085] (1) Site preparation: Select a suitable installation site, ensuring that the site is flat, open, and unobstructed, and can fully receive sunlight and wind. Level and compact the site to provide a stable foundation for the installation of the photovoltaic bracket.

[0086] (2) Column installation: According to the design requirements, fix the support columns vertically on the ground. The stability of the columns can be ensured by pre-embedded anchor bolts, concrete pouring, etc. The installation spacing and height of the columns should be reasonably adjusted according to the size of the solar panels and the installation angle.

[0087] (3) Diagonal brace installation: Connect the diagonal brace between the support column and the solar panel. One end of the diagonal brace is fixed to the column by bolts or welding, and the other end is connected to the frame of the solar panel. Adjust the angle and length of the diagonal brace so that the solar panel can receive sunlight at the optimal angle.

[0088] (4) Installation of micro wind turbine 3: Drill holes symmetrically in the middle of the front column of the photovoltaic support, fix and weld the cylindrical roller bearing in the column hole, and insert the impeller center shaft into the cylindrical roller bearing; connect the micro wind turbine 32 to the impeller center shaft; ensure the verticality and stability of the tower during installation to avoid swaying or tilting under the action of wind.

[0089] (5) Line connection: Connect the output cable of the micro wind turbine 32 to the inverter 2. During the connection process, pay attention to the insulation and waterproofing of the line to ensure the reliability of the electrical connection. Connect the output cable of the micro wind turbine 32 to the energy storage battery 4. Charge the energy storage battery 4 through the charging controller 5. When the photovoltaic power generation is low, the energy storage battery will be used as a supplement. Connect the output lines of the solar panel and the micro wind turbine to the input terminal of the inverter 2. Connect the output terminal of the energy storage battery 4 to the inverter 2. Provide power support for the load when the solar light is insufficient or the wind is weak.

[0090] Before system commissioning, conduct a comprehensive inspection of all equipment installations and connections to ensure secure installation, correct electrical connections, and good insulation of wiring. Check the operation of the monitoring system to ensure normal data acquisition and transmission. Without connecting any load, start the system and check the power generation of the solar panels and micro wind turbines. Observe the inverter's operating status and check if the output voltage and frequency are normal. After connecting the load, check the system's operation again. Observe the load's operating status and check if the system's power generation can meet the load's needs. Based on the commissioning results, further adjust the system parameters to ensure optimal operating performance. After confirming normal system operation through commissioning, the system can be officially put into operation. During operation, regularly maintain and inspect the system, promptly identify and address any potential faults, and ensure stable system operation.

[0091] During system operation, controller 5 can control the charging and discharging of energy storage battery 4 according to preset logic, and control the closing or opening of switch 7 to compensate for fluctuations in the output current of photovoltaic array 1. The control logic is as follows:

[0092] (1) Nighttime state: Photovoltaic array 1 does not generate electricity, micro wind turbine generator 3 generates electricity, switch 7 is open, and energy storage battery 4 stores the generated energy of micro wind turbine generator 3. Inverter 2 output current ;

[0093] Micro wind turbine generator set 3 output current The charging current of energy storage battery 4 is The third ammeter, 63, measures the combined current. .

[0094] (2) Daytime state: When the sun rises, photovoltaic array 1 generates DC power, which is converted into AC power output by inverter 2. The first current 61 measures the output current of inverter 2. That is, the photovoltaic current in Table 1;

[0095] A gentle breeze blows, the miniature wind turbine generator 3 generates electricity, switch 7 is turned off, and the energy storage battery 4 stores the generated energy from the miniature wind turbine generator 3. The second ammeter 62 measures the output current of the miniature wind turbine generator 3. That is, the wind power current in Table 1;

[0096] (3) The controller reads the initial data:

[0097] Read the current from the first ammeter 61 every 1 second. Read the current from the second ammeter 62. ,

[0098] Record the nine data points measured by the first ammeter 61 ,

[0099] Record the nine data points measured by the second ammeter 62. ,

[0100] Record the 10th data point and proceed to step (4).

[0101] (4) Perform the first compensation current, with a 1s interval.

[0102] Record the 10th data point measured by ammeter 61. ;

[0103] Record the 10th data point measured by ammeter 62. ;

[0104] Calculate the comparison threshold (i.e., the fitted current in Table 1):

[0105]

[0106] judge Controller 5 controls switch 7 to close.

[0107] Energy storage battery 4 discharges, discharge current ;

[0108] At this time, the third ammeter 63 measures the combined current. .

[0109] (5) Perform the second compensation current; interval 1s,

[0110] Record the 11th data point measured by the first ammeter 61. ;

[0111] Record the 11th data point measured by the second ammeter 62. ;

[0112] Perform the calculation of the comparison threshold:

[0113]

[0114] judge Controller 5 controls switch 7 to close.

[0115] Energy storage battery 4 discharges, discharge current ;

[0116] The third ammeter 63 measures the convergence current. .

[0117] (7) Repeat in sequence

[0118] Data was recorded up to the 59th data point, and the calculation results are shown in Table 1.

[0119] Table 1 shows 59 data points recorded by each ammeter.

[0120] 1 25.00 25.00 0.00 3.00 25.00 Energy storage 2 36.00 36.00 0.00 1.00 36.00 Energy storage 3 28.00 28.00 0.00 2.00 28.00 Energy storage 4 22.00 22.00 0.00 4.00 22.00 Energy storage 5 24.00 24.00 0.00 2.00 24.00 Energy storage 6 18.00 18.00 0.00 1.00 18.00 Energy storage 7 26.00 26.00 0.00 3.00 26.00 Energy storage 8 28.00 28.00 0.00 4.00 28.00 Energy storage 9 21.00 21.00 0.00 2.00 21.00 Energy storage 10 15.00 24.30 8.30 1.00 24.30 Discharge 11 18.00 23.60 3.60 2.00 23.60 Discharge 12 25.00 22.50 0.00 4.00 25.00 Energy storage 13 28.00 22.50 0.00 3.00 28.00 Energy storage 14 23.00 22.60 0.00 2.00 23.00 Energy storage 15 24.00 22.60 0.00 3.00 24.00 Energy storage 16 22.00 23.00 1.00 0.00 23.00 Discharge 17 34.00 23.80 0.00 0.00 34.00 Energy storage 18 37.00 24.70 0.00 2.00 37.00 Energy storage 19 29.00 25.50 0.00 1.00 29.00 Energy storage 20 27.00 26.70 0.00 0.00 27.00 Energy storage 21 33.00 28.20 0.00 0.00 33.00 Energy storage 22 36.00 29.30 0.00 2.00 36.00 Energy storage 23 41.00 30.60 0.00 1.00 41.00 Energy storage 24 42.00 32.50 0.00 1.00 42.00 Energy storage 25 32.00 33.30 -0.70 2.00 33.30 Energy storage 26 29.00 34.00 5.00 0.00 34.00 Discharge 27 27.00 33.30 6.30 0.00 33.30 Discharge 28 29.00 32.50 -1.50 5.00 32.50 Energy storage 29 35.00 33.10 0.00 4.00 35.00 Energy storage 30 32.00 33.60 -1.40 3.00 33.60 Energy storage 31 30.00 33.30 3.30 0.00 33.30 Discharge 32 27.00 32.40 5.40 0.00 32.40 Discharge 33 23.00 30.60 7.60 0.00 30.60 Discharge 34 20.00 28.40 5.40 3.00 28.40 Discharge 35 18.00 27.00 7.00 2.00 27.00 Discharge 36 25.00 26.60 -2.40 4.00 26.60 Energy storage 37 24.00 26.30 -0.70 3.00 26.30 Energy storage 38 25.00 25.90 -1.10 2.00 25.90 Energy storage 39 29.00 25.30 0.00 1.00 29.00 Energy storage 40 35.00 25.60 0.00 1.00 35.00 Energy storage 41 37.00 26.30 0.00 2.00 37.00 Energy storage 42 35.00 27.10 0.00 0.00 35.00 Energy storage 43 32.00 28.00 0.00 0.00 32.00 Energy storage 44 27.00 28.70 -3.30 5.00 28.70 Energy storage 45 21.00 29.00 4.00 4.00 29.00 Discharge 46 24.00 28.90 1.90 3.00 28.90 Discharge 47 29.00 29.40 0.40 0.00 29.40 Discharge 48 25.00 29.40 4.40 0.00 29.40 Discharge 49 31.00 29.60 0.00 1.00 31.00 Energy storage 50 35.00 29.60 0.00 2.00 35.00 Energy storage 51 39.00 29.80 0.00 0.00 39.00 Energy storage 52 42.00 30.50 0.00 0.00 42.00 Energy storage 53 31.00 30.40 0.00 5.00 31.00 Energy storage 54 25.00 30.20 1.20 4.00 30.20 Discharge 55 21.00 30.20 6.20 3.00 30.20 Discharge 56 29.00 30.70 1.70 0.00 30.70 Discharge 57 30.00 30.80 0.80 0.00 30.80 Discharge 58 35.00 31.80 0.00 0.00 35.00 Energy storage 59 33.00 32.00 0.00 3.00 33.00 Energy storage

[0121] Inverter 2 output current and system bus current are as follows Figure 4 As shown.

[0122] from Figure 4 As can be seen from the line graph, when the photovoltaic array 1 is blocked by clouds and fog and the inverter 2 output current is at a low point, the energy storage battery 4 discharges to generate a compensation current, which results in the final converged current and effectively reduces the fluctuation of the system output current.

[0123] Through the above specific implementation methods, the photovoltaic support system of the integrated micro wind turbine of this utility model can achieve efficient complementarity between solar and wind energy, improve energy utilization efficiency, and provide users with a stable and clean power supply.

Claims

1. A micro wind turbine integrated wind-solar hybrid power generation system based on a photovoltaic bracket, characterized in that: The wind-solar hybrid power generation system includes a photovoltaic array (1), an inverter (2), a micro wind turbine generator set (3), and an energy storage battery (4). The photovoltaic array (1) includes a photovoltaic module (11) and a photovoltaic support (12). The photovoltaic module (11) is fixed on the photovoltaic support (12). The photovoltaic module (11) is connected in series to the MPPT port of the inverter (2) via a DC cable. The photovoltaic module (11) is used to receive solar energy and generate DC power to be transmitted to the inverter (2). The inverter (2) is fixed on the side column of the photovoltaic support (12). The output line of the inverter (2) is connected to the power grid and is used to convert the photovoltaic DC power into AC power for connection to the power grid. The micro wind turbine generator set (3) includes an impeller (31) and a micro wind turbine generator (32). The impeller (31) is installed in the middle of the front column of the photovoltaic support (12). The micro wind turbine generator (32) is installed on the outside of the column at the impeller shaft end. The output cable of the micro wind turbine generator set (3) is connected to the output end of the inverter (2).

2. The integrated wind-solar hybrid power generation system based on a photovoltaic bracket for a micro wind turbine as described in claim 1, characterized in that: Install a first ammeter (61) at the output terminal of the inverter (2); install a second ammeter (62) on the output line of the micro wind turbine generator set (3); and install a third ammeter (63) on the line behind the junction of the output line of the micro wind turbine generator set (3) and the output line of the inverter (2).

3. A micro wind turbine integrated wind-solar hybrid power generation system based on a photovoltaic bracket as described in claim 1 or 2, characterized in that: The energy storage battery (4) is fixed on the side column of the photovoltaic bracket (12), and the energy storage battery (4) can switch between charging mode and discharging mode.

4. A micro wind turbine integrated wind-solar hybrid power generation system based on a photovoltaic bracket as described in claim 1 or 2, characterized in that: The impeller (31) includes a central rotating shaft and multiple blades distributed on the central rotating shaft. The central rotating shaft is horizontally mounted on the front support of the photovoltaic bracket (12) and is parallel to the bottom edge of the photovoltaic module (11).

5. The integrated wind-solar hybrid power generation system based on a photovoltaic bracket for a micro wind turbine as described in claim 2, characterized in that: The system also includes a controller (5). The first ammeter (61), the second ammeter (62), and the third ammeter (63) are all connected to the controller (5) via signal lines. The first ammeter (61) is used to measure the output current of the inverter (2) and transmit the current data to the controller (5). The second ammeter (62) is used to measure the output current of the micro wind turbine generator set (3) and transmit the current data to the controller (5). The third ammeter (63) is used to measure the current of the output of the micro wind turbine generator set (3) and the output of the inverter (2) at the junction point, and transmit the current data to the controller (5). The energy storage battery (4) is installed on the photovoltaic bracket (12). The controller (5) is connected to the energy storage battery (4) via signal lines. The energy storage battery (4) receives instructions from the controller (5) to perform charging or discharging actions.

6. The integrated wind-solar hybrid power generation system based on a photovoltaic bracket for a micro wind turbine as described in claim 5, characterized in that: The output line of the energy storage battery (4) is connected to the output line of the micro wind turbine generator set (3), and a switch (7) is installed on the line after the connection point. The switch (7) is an electric switch and is used to receive the command of the controller (5) to perform the closing or opening action. The controller (5) is fixed on the photovoltaic bracket (12). The controller (5) controls the charging and discharging of the energy storage battery (4) and controls the closing or opening of the switch (7) to compensate for the output current fluctuation of the photovoltaic array (1).

Images