A heliostat, a wind prevention system for a mirror field and an operation method

Abstract

The present invention discloses a heliostat field equipped with characteristic heliostats, comprising: an acquisition and processing module for measuring and acquiring wind loads borne by different positions of the characteristic heliostats, obtaining pressure sensing signals, and processing corresponding pressure numerical signals; a calculation and control unit for receiving the pressure numerical signals from the acquisition and processing module, calculating the pressure numerical signals, obtaining a target posture that minimizes the wind load borne by the characteristic and ordinary heliostats, and sending an angle control signal to the heliostats for adaptive adjustment to rotate to the target posture; and the calculation and control unit obtaining posture information from the heliostats. The wind load borne by the heliostats at different positions in the field can be monitored in real time, and the operating status of the heliostats can be determined based on the real-time wind load conditions, resulting in more precise control of the heliostats. Different regions can be controlled separately to avoid operational risks and resource waste. A maintenance plan can be formulated during actual operation, and the field operation can be carried out in an economically optimal manner.

Description

Technical Field

[0001] The present invention belongs to the field of heliostats and mirror fields in the field of solar thermal power generation, and in particular relates to a heliostat, a mirror field wind protection system and an operation method. Background Art

[0002] As the economy continues to develop, environmental issues are receiving increasing attention. Against the backdrop of the demand for carbon peak and carbon neutrality, the use of renewable energy has received widespread attention, especially the use of solar energy, which has attracted more attention from the world.

[0003] Solar thermal power generation is a major way of utilizing solar energy. According to the solar energy collection method, solar thermal power generation can be divided into: (1) tower solar thermal power generation; (2) trough solar thermal power generation; (3) dish solar thermal power generation.

[0004] In the field of solar thermal power generation, tower solar thermal power generation will become the next new energy technology that can be commercialized due to its advantages such as high light-to-heat conversion efficiency, high focusing temperature, simple installation and debugging of the control system, and low heat loss.

[0005] In the field of tower solar thermal power generation, heliostats are a key component of the tower solar thermal power generation system. They reflect sunlight onto the absorber at the top of the tower, heating the absorbent fluid, thereby converting light energy into heat energy, which in turn drives the steam turbine to generate electricity.

[0006] In the field of tower-type solar thermal power generation, heliostats serve as the system's collectors, and their operating state and safety performance directly impact the system's power generation efficiency. During their operation, heliostats inevitably encounter strong winds. To ensure their safety, their operating wind speed is clearly set in their design. When the operating wind speed is exceeded, the heliostats shift to a windproof position for self-protection. The typical windproof position is designed to be flat. In reality, the flat position is not the optimal windproof position for different wind speeds and directions, and therefore cannot guarantee the safety of the heliostats in extremely strong winds. Furthermore, the flat position has a large angle span relative to the heliostat's operating angle, making it difficult to quickly shift to a windproof position when strong winds occur, and unable to quickly return to the operating position when the wind conditions improve. This significantly impacts the safety and efficiency of the power generation system. Furthermore, although theoretical calculations were performed on the service life of heliostats during their design, in actual operation, the working environment faced by heliostats is more complex and changeable. The actual service life of heliostats is difficult to obtain through direct measurement, and it is difficult to grasp the real-time service life of the mirror field. There is a risk that the service life of the heliostats or even the mirror field may be affected by the external environment and fail to reach the expected service life, thus affecting operations. Summary of the Invention

[0007] The technical objective of the present invention is to provide a heliostat and mirror field wind protection system and operation method to address the problems of wind damage to heliostats and the impact on power generation efficiency of power stations caused by improper heliostat wind protection posture in the prior art, as well as the risks that may arise when the lifespan of heliostats and mirror fields cannot be accurately monitored.

[0008] In order to solve the above problems, the technical solution of the present invention is:

[0009] A heliostat, comprising:

[0010] Heliostat body, data acquisition and processing module, and calculation control unit;

[0011] The data acquisition and processing module is used to measure and collect the wind pressure values borne by different positions of the reflecting surface of the heliostat body and the wind speed and direction values at the position where the heliostat body is located;

[0012] The calculation control unit is signal-connected to the heliostat body and the data acquisition and processing module, respectively, and is configured to obtain the current posture of the heliostat body. The calculation control unit is also configured to receive wind pressure values and wind speed and direction values measured by the data acquisition and processing module, calculate based on the wind pressure values and wind speed and direction values, and determine a target posture that the heliostat body needs to achieve when the wind pressure on the reflecting surface of the heliostat body is minimized. Based on the calculated target posture and the current posture of the heliostat body, the calculation control unit sends an angle control signal to the heliostat body to adjust the posture, thereby rotating the heliostat body to the target posture.

[0013] More preferably, a data storage is further included, which is signal-connected to the calculation control unit and is used to receive and store the posture information of the heliostat body, and the wind pressure value and wind speed and direction value corresponding to the heliostat body in the corresponding posture from the calculation control unit.

[0014] Further preferably, a simulation unit is further included, which is connected to the data storage library signal and is used to receive attitude information, wind pressure value, wind speed and direction value to simulate and calculate fatigue life data of the heliostat body, so as to detect, maintain and optimize the wind protection strategy of the heliostat body.

[0015] Among them, the data acquisition and processing module includes a wind pressure detection device and a wind speed and direction detection device;

[0016] The wind pressure detection device is used to collect the wind pressure values borne by different positions of the reflecting surface of the heliostat body; the wind pressure detection device includes a pressure sensor, a pressure signal acquisition device and a pressure signal processing device;

[0017] The pressure sensor is installed on the back of the reflective surface of the heliostat and is used to measure wind pressure;

[0018] The pressure signal acquisition device is connected to the pressure sensor signal and is used to receive the electrical signal of the pressure sensor to obtain the pressure sensing signal;

[0019] The pressure signal processing device is connected to the pressure signal acquisition device, and is used to receive the pressure sensor signal and eliminate the interference signal and then convert it into the wind pressure value;

[0020] The wind speed and direction detection device is arranged near the heliostat body and is used to measure and obtain the wind speed and direction values at the location of the heliostat body.

[0021] Further preferably, the wind pressure detection device is also used to provide real-time feedback on the adaptive adjustment of the heliostat body.

[0022] A mirror field wind protection system, comprising

[0023] Characteristic heliostat, the characteristic heliostat is a heliostat that satisfies any of the above conditions;

[0024] A common heliostat, comprising a heliostat body, a calculation control unit and a wind speed and direction detection device;

[0025] The calculation control unit is connected to the heliostat body, the wind speed and direction detection device, and the characteristic heliostat signal, respectively, to obtain the current posture of the heliostat body. At the same time, the calculation control unit is also used to receive the wind pressure value of the adjacent characteristic heliostat and the relative position relationship between the heliostat body and the characteristic heliostat, and then calculate the wind pressure value borne by the reflecting surface of the heliostat body;

[0026] The calculation control unit is further configured to receive wind speed and direction values of a nearby wind speed and direction detection device and a relative position relationship between the heliostat body and the wind speed and direction detection device, and then calculate the wind speed and direction values at the heliostat body;

[0027] The target attitude that the heliostat body needs to reach when the minimum wind pressure is reached is calculated based on the wind pressure value and the wind speed and direction value. Based on the calculated target attitude and the current attitude of the heliostat body, an angle control signal is sent to the heliostat body to adjust the attitude so that the heliostat body rotates to the target attitude.

[0028] Among them, the characteristic heliostats are dispersedly arranged in the mirror field. Any three adjacent characteristic heliostats form a monitoring area in the shape of a closed triangle. The area of each monitoring area is similar. The ordinary heliostats are evenly distributed in the monitoring area.

[0029] The wind pressure value of the ordinary heliostat is calculated by the relative position of the ordinary heliostat and the three characteristic heliostats in the monitoring area where it is located, as well as the wind pressure value of each characteristic heliostat.

[0030] The wind speed and direction detection device is anemometers, which are dispersedly arranged in the mirror field and used to obtain the wind speed and direction values at the location. The wind speed and direction values at the ordinary heliostat are obtained through calculation.

[0031] The wind speed and direction values of the ordinary heliostat are calculated based on the relative positions of the ordinary heliostat and three anemometers nearby, as well as the wind speed and direction values of each anemometer.

[0032] A windproof method for a mirror field, applied to the above-mentioned mirror field windproof system, comprises the following steps:

[0033] S101: monitoring and obtaining wind pressure values of characteristic heliostats and ordinary heliostats at different locations;

[0034] Obtaining the wind pressure value of the characteristic heliostat through a wind pressure detection device;

[0035] The wind pressure value borne by the reflecting surface of the heliostat body is calculated by receiving the wind pressure value of the characteristic heliostat adjacent to the ordinary heliostat and the relative position relationship between the heliostat body of the ordinary heliostat and the characteristic heliostat;

[0036] The wind speed and direction values in the mirror field are monitored by anemometers arranged at different locations in the mirror field;

[0037] The wind speed and direction values are obtained through a wind speed and direction detection device of the characteristic heliostat;

[0038] The wind speed and direction values at the heliostat body are calculated by receiving the wind speed and direction values of a wind speed and direction detection device adjacent to the ordinary heliostat and the relative position relationship between the heliostat body of the ordinary heliostat and the wind speed and direction detection device;

[0039] S102: When the wind pressure value measured by the characteristic heliostat or the common heliostat at any position exceeds a preset threshold, a wind avoidance mode is activated, and calculation is performed based on the wind pressure value and the wind speed and direction values to adjust the characteristic heliostat or the common heliostat to an optimal wind avoidance posture.

[0040] In step S102, the wind pressure value of the ordinary heliostat is calculated as follows:

[0041] A1: Select three characteristic heliostats adjacent to a common heliostat. The three characteristic heliostats form a closed triangular monitoring area, and the common heliostat is located within the monitoring area.

[0042] A2: Based on the wind pressure values and position relationship of the three characteristic heliostats, the wind pressure value of the ordinary heliostat is calculated. The calculation formula is as follows

[0043]

[0044] Among them, the vertex coordinates of the three characteristic heliostats are P0, P1, and P2, the corresponding wind pressure values of the three characteristic heliostats are V0, V1, and V2, the vertex coordinate of the ordinary heliostat is P, a is the area of the closed triangle formed by P0, P1, and P2, a0 is the area of the small triangle area formed by P1, P0, and P, a1 is the area of the small triangle area formed by P2, P0, and P, and a2 is the area of the small triangle area formed by P1, P2, and P;

[0045] A3: Select three anemometers near a common heliostat; the three anemometers form a closed triangle, and the common heliostat is located within the closed triangle.

[0046] A4: Based on the wind speed, wind direction and position relationship of the three anemometers, the wind speed and direction of the ordinary heliostat can be calculated using the following formula:

[0047]

[0048]

[0049] Among them, the vertex coordinates of the three anemometers are D0, D1, and D2, the corresponding wind speed values of the three anemometers are U0, U1, and U2, and the wind direction angles are θ0, θ1, and θ2. c is the area of the closed triangular region D0, D1, and D2, c0 is the area of the small triangular region formed by D1, D0, and P, c1 is the area of the small triangular region formed by D0, D2, and P, and c2 is the area of the small triangular region formed by D1, D2, and P. U is the wind speed value of the ordinary heliostat, and θ is the wind direction angle of the ordinary heliostat.

[0050] A method for predicting the operating life of a mirror field, applied to the above-mentioned mirror field wind protection system, comprises the following steps:

[0051] S201: obtaining attitude information, wind pressure value, and wind speed and direction value of a characteristic heliostat during operation, and calculating fatigue life data of the characteristic heliostat through simulation;

[0052] S202: using fatigue life simulation data of characteristic heliostats at different positions in the mirror field, the positional relationship between the characteristic heliostat and its surrounding ordinary heliostats, and wind speed and direction values at different positions in the mirror field, to obtain fatigue life data of ordinary heliostats through interpolation calculation;

[0053] S203: Adjusting the wind protection strategy based on fatigue life data of the characteristic heliostat and the common heliostat.

[0054] The step S202 is specifically as follows:

[0055] B1: Select three characteristic heliostats adjacent to an ordinary heliostat; the three characteristic heliostats form a closed triangle area, and the ordinary heliostat is located within the closed triangle area;

[0056] B2: Based on the fatigue life data and position relationship of the three characteristic heliostats, the fatigue life data of the ordinary heliostat is calculated. The calculation formula is as follows

[0057]

[0058] Among them, the vertex coordinates of the three characteristic heliostats are Q0, Q1, and Q2, the corresponding fatigue life data of the three characteristic heliostats are S0, S1, and S2, the vertex coordinate of the ordinary heliostat is P, b is the area of the closed triangle region formed by Q0, Q1, and Q2, b0 is the area of the small triangle region formed by Q0, Q1, and P, b1 is the area of the small triangle region formed by Q2, Q0, and P, and b2 is the area of the small triangle region formed by Q1, Q2, and P.

[0059] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0060] 1. The present invention can monitor the wind load conditions borne by heliostats at different locations in the mirror field in real time and determine the operating status of the heliostats based on the real-time wind load conditions. Compared with the existing technology (which determines the operating status of the heliostats based on data measured by anemometers), the present invention can provide more precise control over the heliostats.

[0061] 2. The present invention can monitor the real-time wind load conditions of heliostats at different locations in the field, and can then control them separately according to the conditions in different areas. This avoids the existing practice of rotating the entire field to a uniform shelter angle during strong winds, which leads to operational risks and waste of resources.

[0062] 3. The present invention can monitor the fatigue life of heliostats at different locations in the field, and then formulate a maintenance plan in actual operation according to the required operating life of the power station. It can also comprehensively consider the maintenance cost and the impact on power generation, and carry out the field operation in the most economical way. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Various other advantages and benefits will become apparent to those skilled in the art by reading the following detailed description of the preferred embodiment.The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0064] Figure 1 A simplified structural diagram of the tower solar thermal power generation system of the present invention;

[0065] Figure 2 This is a structural diagram of a characteristic heliostat of the present invention;

[0066] Figure 3 Schematic diagram of different arrangements of the pressure sensor of the present invention on a characteristic heliostat;

[0067] Figure 4 Schematic diagram of the arrangement of a heliostat field according to the present invention;

[0068] Figure 5 Schematic diagram of a calculation scheme for wind pressure value of a common heliostat according to the present invention;

[0069] Figure 6 Schematic diagram of the wind speed and direction calculation scheme for the heliostat location according to the present invention.

[0070] Description of Reference Numerals

[0071] 101: Heliostat; 1011: Feature heliostat; 1012: Ordinary heliostat; 102: Pressure sensor; 103: Pressure signal acquisition device; 104: Pressure signal processing device; 105: Computation control unit; 106: Data storage library; 107: Simulation unit; 2: Anemometer. DETAILED DESCRIPTION

[0072] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0073] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. As used herein, "one" not only means "only one" but also "more than one."

[0074] The following is a detailed description of a heliostat, a windbreak system for a mirror field, and an operating method of the present invention, with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims.

[0075] Example 1

[0076] See Figure 1 The tower-type solar thermal power station drives a large number of heliostats to track sunlight, so that the sunlight is concentrated on the surface of the absorber at the top of the heat absorption tower, heating the heat-absorbing working fluid, converting light energy into heat energy, and then converting heat energy into electrical energy to achieve solar thermal power generation.

[0077] See Figure 2 This embodiment provides a heliostat, including a heliostat body, a data acquisition and processing module, a calculation control unit 105 , a data storage library 106 and a simulation unit 107 .

[0078] The heliostat body consists of a mirror frame, mirror surface, main beam, column, transmission system and drive system.

[0079] The data acquisition and processing module is used to measure the heliostat 101. Specifically, the heliostat 101 equipped with the data acquisition and processing module can be referred to as the characteristic heliostat 1011. By collecting the wind loads borne by different positions of the characteristic heliostat 1011, a pressure sensing signal is obtained, and the pressure sensing signal is processed to obtain the corresponding wind pressure value.

[0080] See Figure 2 and Figure 3 The data acquisition and processing module includes at least one pressure sensor 102, a pressure signal acquisition device 103, and a pressure signal processing device 104. The pressure sensor is mounted on the back of the reflective surface of the heliostat 101. Pressure sensor 102 is used to measure wind pressure at different locations under wind load conditions. The pressure signal acquisition device 103 is signal-connected to the pressure sensor 102 and receives electrical signals from it to generate pressure sensing signals. The pressure signal processing device 104 is signal-connected to the pressure signal acquisition device 103 and receives and processes the pressure sensing signals, eliminating interference signals and converting them into wind pressure values.

[0081] The pressure sensor 102 can be any type of device with pressure measurement function, preferably, a patch pressure resistor. In addition, the number of pressure sensors 102 can be one or more. In this embodiment, see Figure 2 , illustrates the deployment of one or more pressure sensors 102. The installation location and number of pressure sensors 102 on the characteristic heliostat 1011 can be flexibly selected and determined based on the area of the characteristic heliostat and actual measurement needs. Preferably, during the wind load adaptation process, pressure sensors 102 serve as measurement devices, measuring the real-time wind pressure on the characteristic heliostat 1011. Pressure sensors 102 also serve as feedback devices for the adaptive adjustment, providing real-time feedback on the effectiveness of wind load adaptation.

[0082] The pressure signal collecting device 103 and the pressure signal processing device 104 may be two devices having the above two functions or a single device having two functions in one.

[0083] The calculation control unit 105 is signal-connected to the characteristic heliostat 101 and the data acquisition and processing module, and is configured to receive wind pressure values and wind speed and direction values from the data acquisition and processing module. The calculation control unit 105 calculates the wind pressure and wind speed and direction values using its built-in algorithm, i.e., processes the wind load data at different locations to obtain a target attitude that minimizes the wind load on the characteristic heliostat 1011. The calculation control unit then sends an angle control signal to the characteristic heliostat 1011 for adaptive adjustment to achieve the target attitude. The calculation control unit also obtains attitude information from the characteristic heliostat 1011 as a basis for angle control.

[0084] Data repository 106 is signal-connected to calculation control unit 105 and is configured to receive and store heliostat 101 attitude information, wind pressure values, and wind speed and direction values from calculation control unit 105. Simulation unit 107 receives attitude information, wind pressure values, and wind speed and direction values from data repository 106 and, using its internal simulation software, simulates and calculates fatigue life data for the corresponding heliostat 101, thereby enabling inspection, maintenance, and wind protection strategy optimization for the heliostat.

[0085] Example 2

[0086] This embodiment provides a wind protection system for a mirror field, comprising the heliostats described in Example 1, ordinary heliostats 1012, and anemometers 2. The anemometers 2 are dispersed throughout the mirror field and are used to obtain wind speed and direction values at their respective locations. The wind speed and direction values of the characteristic heliostats 1011 and ordinary heliostats 1012 are then calculated.

[0087] The characteristic heliostats 1011 are dispersedly arranged in the mirror field. The characteristic heliostats 1011 and the anemometer 2 are located at the same place. The wind speed and direction of the characteristic heliostat 1011 can be directly measured by the anemometer 2. The wind pressure value can also be directly measured by the wind pressure detection device provided therein. Then, the target posture that needs to be achieved when the wind pressure value on the reflecting surface of the characteristic heliostat 1011 reaches the minimum is calculated.

[0088] The wind pressure value of the ordinary heliostat 1012 is obtained by the relative position relationship with the adjacent characteristic heliostat 1011 and the wind pressure value of the characteristic heliostat 1011. The wind speed and direction value of the ordinary heliostat 1012 is also obtained by the relative position relationship with the nearby anemometer 2 and the wind speed and direction value of the anemometer 2.

[0089] Specifically, the wind pressure value of the ordinary heliostat 1012 is calculated based on the relative position of the ordinary heliostat 1012 and the three adjacent characteristic heliostats 1011, as well as the wind pressure values measured by the data acquisition and processing modules of the three characteristic heliostats 1011. The target attitude required for the reflecting surface of the ordinary heliostat 1012 to achieve the minimum wind pressure is further calculated based on the relative position of the ordinary heliostat 1012 and the three adjacent anemometers 2, as well as the wind speed and direction values measured by the three anemometers 2.

[0090] Example 3

[0091] See Figure 5 and Figure 6 This embodiment provides a windproof method for a mirror field, which is applied to the mirror field windproof system described in Example 2 and specifically includes the following steps.

[0092] First, in step S101, when the mirror field is operating normally, the wind load conditions of the heliostats 101 at different positions in the mirror field are monitored by the characteristic heliostat 1011 to obtain the wind pressure values of the characteristic heliostat 1011 and the ordinary heliostat 1012. The wind speed and direction values in the mirror field are monitored by the anemometers 2 arranged at different positions in the mirror field.

[0093] There are some differences in the adjustment process between the characteristic heliostat 1011 and the ordinary heliostat 1012. For the characteristic heliostat 1011, it is only necessary to measure the wind pressure value through its own data acquisition and processing module, and then measure the wind speed and direction values through its anemometer, and then compare and determine whether the wind load threshold is exceeded.

[0094] See Figure 5 For the ordinary heliostat 1012, the following steps can be subdivided. In step A1, for any ordinary heliostat 101-1 to be tested, the three nearest characteristic heliostats 1-1, 1-2, and 1-4 in different directions around it are selected to form a closed triangular area 3-1. The ordinary heliostat 1012 is located inside the closed triangular area 3-1.

[0095] Then, in step A2, the position coordinates and wind pressure values of the three characteristic heliostats 1-1, 1-2, and 1-4 in the closed triangle area are known values. The coordinates of the ordinary heliostat 101-1 to be calculated are also known values, and its wind pressure value is the calculation target. Using the triangle interpolation algorithm, the coordinates of the ordinary heliostat 101-1 and the coordinates of the three characteristic heliostats 1-1, 1-2, and 1-4 respectively form three small triangles, and the proportional area method can be used to calculate the wind pressure value of the ordinary heliostat. The formula is as follows

[0096]

[0097] The vertex coordinates of the three characteristic heliostats 1-1, 1-2, and 1-4 are divided into P0, P1, and P2, and the corresponding wind pressure values of the three characteristic heliostats 1-1, 1-2, and 1-4 are V0, V1, and V2. The vertex coordinate of the common heliostat is P, a is the area of the closed triangle region formed by P0, P1, and P2, a0 is the area of the small triangle region formed by P1, P0, and P, a1 is the area of the small triangle region formed by P2, P0, and P, and a2 is the area of the small triangle region formed by P1, P2, and P.

[0098] Similarly, using the same calculation method, see Figure 6 In step A3, the three nearest anemometers 2 in different directions around the ordinary heliostat 1012 are selected; wherein the three anemometers 2 form a closed triangle area, and the ordinary heliostat 1012 is located in the closed triangle area.

[0099] Finally, in step A4, the wind speed and direction values of the ordinary heliostat 1012 are calculated based on the wind speed values, wind direction angles and positional relationship of the three anemometers 2 with the ordinary heliostat 1012. The wind speed and direction values and wind pressure values obtained can be used to correct the ordinary heliostat 1012. The wind speed and direction value calculation formula is as follows:

[0100]

[0101]

[0102] The vertex coordinates of the three anemometers 2 are D0, D1, and D2, the corresponding wind speed values are U0, U1, and U2, and the wind direction angles are θ0, θ1, and θ2, respectively. c is the area of the closed triangular region D0, D1, and D2, c0 is the area of the small triangular region formed by D1, D0, and P, c1 is the area of the small triangular region formed by D0, D2, and P, and c2 is the area of the small triangular region formed by D1, D2, and P. U is the wind speed value of the ordinary heliostat 1012, and θ is the wind direction angle of the ordinary heliostat 1012. The above method is also applicable to the calculation of the wind speed and direction values of the characteristic heliostat 1011.

[0103] Then, in step S202 , when the wind load data measured by the heliostat 101 at any position exceeds a preset wind load threshold, the heliostat starts the wind avoidance mode, and the calculation control unit 105 adjusts the heliostat 101 to the optimal wind avoidance posture according to the wind load data.

[0104] Example 4

[0105] This embodiment provides a method for predicting the operating life of a mirror field, which is applied to the mirror field wind protection system according to Example 2, and includes the following steps:

[0106] First, in step S201, during the operation of the mirror field, the posture information, wind pressure value, wind speed and direction value of the characteristic heliostat 1011 at each moment of operation are stored in the data repository 106, and then the fatigue life data of the characteristic heliostat 1011 is simulated and calculated using the simulation unit 107.

[0107] To calculate the fatigue life data of the ordinary heliostats 1012, the process proceeds to step S202. Using the fatigue life simulation data of the characteristic heliostats 1011 at different locations in the mirror field, the fatigue life data of the ordinary heliostats 1012 at different locations in the mirror field are obtained through interpolation calculation based on the positional relationship between the characteristic heliostat 1011 and its surrounding ordinary heliostats 1012 and the wind speed and direction data of the anemometers 2 at different locations in the mirror field.

[0108] Among them, step S202 is specifically as follows:

[0109] First, in step B1, see Figure 5 For any ordinary heliostat 1012, taking ordinary heliostat 101-1 as an example, the three nearest characteristic heliostats 1-1, 1-2, and 1-4 in different directions around it are selected. The three characteristic heliostats 1-1, 1-2, and 1-4 form a closed triangle area, and ordinary heliostat 101-1 is located within the closed triangle area.

[0110] Next, calculations are performed in step B2. The position coordinates and fatigue life data of the three characteristic heliostats 1-1, 1-2, and 1-4 are known values. The coordinates of the ordinary heliostat 101-1 to be calculated are also known values, and its fatigue life data is the calculation target. Using the triangle interpolation algorithm, the coordinates of the ordinary heliostat 101-1 to be calculated and the coordinates of the three characteristic heliostats 1-1, 1-2, and 1-4 forming the triangle respectively form three small triangles. The fatigue life data of the ordinary heliostat 101-1 to be calculated can be obtained using the proportional area method. The calculation formula is as follows:

[0111]

[0112] The vertex coordinates of the three characteristic heliostats 1-1, 1-2, and 1-4 are Q0, Q1, and Q2, respectively, and their corresponding fatigue life data are S0, S1, and S2. The vertex coordinate of the ordinary heliostat 101-1 is P, b is the area of the closed triangle region formed by Q0, Q1, and Q2, b0 is the area of the small triangle region formed by Q0, Q1, and P, b1 is the area of the small triangle region formed by Q2, Q0, and P, and b2 is the area of the small triangle region formed by Q1, Q2, and P.

[0113] Finally, in step S203, the wind protection strategy is adjusted based on the fatigue life data of the characteristic heliostat 1011 and the standard heliostat 1012. Specifically, consumable parts of the characteristic heliostat 1011 can be regularly maintained or replaced based on the fatigue life simulation results, while consumable parts of the standard heliostat 1012 can be regularly maintained or replaced based on the fatigue life interpolation estimation data.

[0114] Based on the fatigue life simulation results of each characteristic heliostat 1011 and taking into account its overall lifespan requirements, the wind protection strategy for subsequent operation is adjusted and sent to the calculation control unit 105 for use in subsequent calculations of its wind protection posture. Based on the fatigue life fitting estimation data of the ordinary heliostat 1012, the wind protection strategy for subsequent operation is adjusted and sent to the calculation control unit 105 for use in subsequent calculations of its wind protection posture.

[0115] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the scope of protection of the present invention.

Claims

1. A mirror field wind protection system, characterized in that: include: A characteristic heliostat, comprising a characteristic heliostat body, a characteristic heliostat data acquisition and processing module, and a characteristic heliostat calculation and control unit; The characteristic heliostat data acquisition and processing module is used to measure and acquire wind pressure values borne by different positions of the reflecting surface of the characteristic heliostat body and wind speed and direction values at the position where the characteristic heliostat body is located; The characteristic heliostat calculation control unit is signal-connected to the characteristic heliostat body and the characteristic heliostat data acquisition and processing module, respectively, and is configured to obtain a current posture of the characteristic heliostat body. Simultaneously, the characteristic heliostat calculation control unit is further configured to receive wind pressure values and wind speed and direction values measured by the characteristic heliostat data acquisition and processing module, and perform calculations based on the wind pressure values and wind speed and direction values measured by the characteristic heliostat data acquisition and processing module to obtain a target posture that the characteristic heliostat body needs to achieve when the wind pressure value on the reflecting surface of the characteristic heliostat body is minimized. Based on the calculated target posture that the characteristic heliostat body needs to achieve and the current posture of the characteristic heliostat body, the control unit sends an angle control signal to the characteristic heliostat body for posture adjustment, so that the characteristic heliostat body rotates to the target posture that the characteristic heliostat body needs to achieve. An ordinary heliostat, comprising an ordinary heliostat body, an ordinary heliostat calculation control unit and an ordinary heliostat wind speed and direction detection device; The ordinary heliostat calculation control unit is respectively connected to the ordinary heliostat body, the ordinary heliostat wind speed and direction detection device, and the characteristic heliostat signal, and is used to obtain the current posture of the ordinary heliostat body. At the same time, the ordinary heliostat calculation control unit is also used to receive the wind pressure value adjacent to the characteristic heliostat and the relative position relationship between the ordinary heliostat body and the characteristic heliostat, and then calculate the wind pressure value borne by the reflecting surface of the ordinary heliostat body; The conventional heliostat calculation control unit is further configured to receive wind speed and direction values of a wind speed and direction detection device adjacent to the conventional heliostat and a relative positional relationship between the conventional heliostat body and the conventional heliostat wind speed and direction detection device, thereby calculating the wind speed and direction values at the conventional heliostat body, and performing calculations based on the wind pressure value borne by the reflective surface of the conventional heliostat body and the wind speed and direction values at the conventional heliostat body to obtain a target posture that the conventional heliostat body needs to achieve when the wind pressure value borne by the reflective surface of the conventional heliostat is minimized. Based on the calculated target posture that the conventional heliostat body needs to achieve and the current posture of the conventional heliostat body, an angle control signal is sent to the conventional heliostat body to adjust its posture, so that the conventional heliostat body rotates to the target posture that the conventional heliostat body needs to achieve.

2. The mirror field wind protection system according to claim 1, characterized in that: The system further includes a data repository, which is signal-connected to the characteristic heliostat calculation control unit and is configured to receive and store the posture information of the characteristic heliostat body, and the wind pressure value and wind speed and direction value corresponding to the characteristic heliostat body in the corresponding posture from the characteristic heliostat calculation control unit.

3. The mirror field wind protection system according to claim 2, characterized in that: The system further includes a simulation unit, which is signal-connected to the data storage library and configured to receive posture information of the characteristic heliostat body, wind pressure values, and wind speed and direction values corresponding to the characteristic heliostat body in a corresponding posture, and simulate and calculate fatigue life data of the characteristic heliostat body to perform inspection, maintenance, and wind protection strategy optimization for the characteristic heliostat body.

4. The mirror field wind protection system according to claim 1, characterized in that: The characteristic heliostat data acquisition and processing module includes a characteristic heliostat wind pressure detection device and a characteristic heliostat wind speed and direction detection device; The characteristic heliostat wind pressure detection device is used to collect wind pressure values borne by different positions of the reflecting surface of the characteristic heliostat body; The characteristic heliostat wind pressure detection device includes a pressure sensor, a pressure signal acquisition device and a pressure signal processing device; The pressure sensor is installed on the back of the reflective surface of the characteristic heliostat, and the pressure sensor is used to measure wind pressure; The pressure signal acquisition device is connected to the pressure sensor signal and is used to receive the electrical signal of the pressure sensor to obtain a pressure sensing signal; The pressure signal processing device is signal-connected to the pressure signal acquisition device, and is used to receive the pressure sensing signal, remove interference signals, and convert the signal into a wind pressure value; The characteristic heliostat wind speed and direction detection device is arranged near the characteristic heliostat body, and is used to measure and obtain the wind speed and direction value at the location of the characteristic heliostat body.

5. The mirror field wind protection system according to claim 4, characterized in that: The characteristic heliostat wind pressure detection device is further used to provide real-time feedback on the adaptive adjustment of the characteristic heliostat body.

6. The mirror field wind protection system according to claim 1, characterized in that: The characteristic heliostats are dispersedly arranged in the mirror field, and any three adjacent characteristic heliostats The mirrors form a monitoring area in the shape of a closed triangle, and the areas of the monitoring areas are similar; the ordinary heliostats are evenly distributed in the monitoring area; The wind pressure value of the ordinary heliostat is calculated by the relative position of the ordinary heliostat and the three characteristic heliostats in the monitoring area where the ordinary heliostat is located, and the wind pressure value of each characteristic heliostat; The conventional heliostat wind speed and direction detection device is an anemometer, which is dispersedly arranged in the mirror field and is used to obtain the wind speed and direction value at the location, and obtain the wind speed and direction value at the conventional heliostat through calculation; The wind speed and direction value of the ordinary heliostat is calculated based on the relative positions of the ordinary heliostat and the three anemometers near it, as well as the wind speed and direction values of the anemometers.

7. A windproof method for a mirror field, applied to the mirror field protection system according to any one of claims 1 to 6, characterized in that: The steps include: S101: monitoring and obtaining wind pressure values of characteristic heliostats and ordinary heliostats at different locations; Obtaining a wind pressure value of the characteristic heliostat through a wind pressure detection device of the characteristic heliostat; The wind pressure value borne by the reflecting surface of the ordinary heliostat body is calculated by receiving the wind pressure value of the characteristic heliostat adjacent to the ordinary heliostat and the relative position relationship between the ordinary heliostat body of the ordinary heliostat and the characteristic heliostat; The wind speed and direction values in the mirror field are monitored by anemometers arranged at different locations in the mirror field; Obtaining wind speed and direction values of the characteristic heliostat through a wind speed and direction detection device of the characteristic heliostat; By receiving the wind speed and direction value of the wind speed and direction detection device adjacent to the ordinary heliostat and the relative positional relationship between the ordinary heliostat body of the ordinary heliostat and the wind speed and direction detection device, thereby calculating the wind speed and direction value at the ordinary heliostat body; S102: When the wind pressure value measured by the characteristic heliostat or the ordinary heliostat at any position exceeds a preset threshold, a wind avoidance mode is activated, and calculation is performed based on the wind pressure value and the wind speed and direction values to adjust the characteristic heliostat or the ordinary heliostat to an optimal wind avoidance posture.

8. The windproof method for a mirror field according to claim 7, characterized in that: In step S102, the wind pressure value of the conventional heliostat is calculated as follows: A1: Selecting three characteristic heliostats adjacent to the ordinary heliostat; wherein the three characteristic heliostats form a closed triangular monitoring area, and the ordinary heliostat is located in the monitoring area; A2: Based on the wind pressure values and positional relationships of the three characteristic heliostats, the wind pressure value of the ordinary heliostat is calculated using the following formula: Among them, the vertex coordinates of the three characteristic heliostats are The wind pressure corresponding to the three heliostats with the characteristics is , the vertex coordinates of the ordinary heliostat are , for The area of the closed triangle formed, for The area of the small triangle formed, for The area of the small triangle formed, for The area of the small triangle formed; A3: Selecting three anemometers adjacent to the conventional heliostat; wherein the three anemometers form a closed triangle area, and the conventional heliostat is located within the closed triangle area; A4: Based on the wind speed, wind direction and position relationship of the three anemometers, the wind speed and direction of the ordinary heliostat are calculated using the following formula: Among them, the vertex coordinates of the three anemometers are The wind speed values corresponding to the three anemometers are , the wind direction angles are , A closed triangular area The area, for The area of the small triangle formed, for The area of the small triangle formed, for The area of the small triangle formed, is the wind speed value of the ordinary heliostat, is the wind direction angle of the ordinary heliostat.

9. A method for predicting the operating life of a mirror field, applied to the mirror field wind protection system according to any one of claims 1 to 6, characterized in that: Includes the following steps S201: Obtaining the attitude information, wind pressure value, wind speed and direction of the characteristic heliostat during operation Calculating fatigue life data of the characteristic heliostat by value simulation; S202: Obtain fatigue life data of the ordinary heliostats by interpolation calculation using fatigue life simulation data of the characteristic heliostats at different positions in the mirror field, a positional relationship between the characteristic heliostat and its surrounding ordinary heliostats, and wind speed and direction values at different positions in the mirror field; S203: Adjusting a wind protection strategy according to the fatigue life data of the characteristic heliostat and the common heliostat.

10. The method for predicting the operating life of a mirror field according to claim 9, characterized in that: The step S202 is specifically as follows: B1: selecting three characteristic heliostats adjacent to the ordinary heliostat; wherein the three characteristic heliostats form a closed triangular area, and the ordinary heliostat is located within the closed triangular area; B2: Based on the fatigue life data and position relationship of the three characteristic heliostats, the fatigue life data of the ordinary heliostat is calculated. The calculation formula is as follows Among them, the vertex coordinates of the three characteristic heliostats are The fatigue life data corresponding to the three heliostats with the above characteristics are , the vertex coordinates of the ordinary heliostat are , for The area of the closed triangle formed, for The area of the small triangle formed, for The area of the small triangle formed, for The area of the small triangle formed.

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