An intelligent control system for solar thermal mirror field

Abstract

The present invention relates to the technical field of photothermal power generation control system, and in particular to an intelligent control system for a solar thermal mirror field, wherein the system comprises an information acquisition module for acquiring operation information, environmental information and parameters of a condenser; a data transmission module for data transmission and storage; a fault analysis module for judging the operation fault of the condenser; an angle analysis module for analyzing the sun angle; an emergency control module for controlling the emergency operation mode of the condenser and judging the safety state of the condenser according to the control result; an operation control module for controlling the delay time and defocus angle of the condenser, and adjusting the control process of the defocus angle of the condenser according to the curvature radius of the condenser and the focal length of the condenser. The present invention improves the control efficiency and control stability of the photothermal mirror plant.

Description

Technical Field

[0001] The present invention relates to the technical field of solar thermal power generation control systems, and in particular to an intelligent control system for a solar thermal mirror field. Background Art

[0002] The control system of trough solar technology consists of LOC and SCS. One LOC controls one SCA, and a large number of SCAs form a mirror field, which is controlled by SCS. In the prior art, the physical controller of SCS does not support wireless communication and can only communicate with hundreds or thousands of LOCs through a large number of switches and communication optical cables to achieve control of the concentrator.

[0003] Chinese Patent Publication No.: CN104571139B discloses a heliostat field instrument control system, which relates to the field of solar thermal power generation control systems, can improve infrastructure efficiency, and avoid equipment failures caused by cable damage. It includes a first type of wireless multifunctional node, a second type of wireless multifunctional node, a wireless converter, a wireless transmitter, and a heliostat field control server; the first type of wireless multifunctional node obtains the first data sent by the second type of wireless multifunctional node, the wireless converter or the wireless transmitter through a wireless network; and sends the obtained first data to the heliostat field control server; wherein the first type of wireless multifunctional node is arranged on the power island of the solar thermal power station, and the second type of wireless multifunctional node is arranged on the top of each solar thermal absorption and storage tower. The present invention is suitable for the communication of heliostat field instruments in a solar thermal power station under a wireless network; it can be seen that when the scheme controls the solar thermal mirror field, it only analyzes the collected solar angle and the operating data of the equipment, and there are problems such as low control efficiency of the solar thermal mirror field and poor stability of the control of the solar thermal mirror plant. Summary of the invention

[0004] To this end, the present invention provides an intelligent control system for a solar thermal mirror field, so as to overcome the problems of low control efficiency of the solar thermal mirror field and poor control stability of the solar thermal mirror plant in the prior art.

[0005] To achieve the above object, the present invention provides an intelligent control system for a solar thermal mirror field, the system comprising:

[0006] An information acquisition module is used to obtain the operation information, environmental information and condenser parameters of the condenser;

[0007] A data transmission module is used to transmit the operation information, environmental information and parameters of the condenser to the soft controller and store the transmitted data;

[0008] A fault analysis module is used to judge the operation fault of the condenser according to the inclinometer signal state, movement angle, motor operation time, collector assembly temperature signal state, circuit outlet temperature signal state and pressure sensor signal state of the condenser;

[0009] Angle analysis module, used to obtain the altitude angle and azimuth angle of the sun, and analyze the sun angle according to the altitude angle and azimuth angle of the sun;

[0010] An emergency control module is used to control the emergency operation mode of the condenser and to judge the safety state of the condenser according to the control result;

[0011] The operation control module is used to control the delay time and defocus angle of the condenser, and adjust the control process of the condenser defocus angle according to the curvature radius of the condenser and the focal length of the condenser.

[0012] Furthermore, the first fault analysis unit makes a judgment on the operation fault of the condenser according to the temperature signal state of the collector assembly, the temperature signal state of the circuit outlet and the signal state of the pressure sensor, wherein:

[0013] When the collector assembly temperature signal fails, the circuit outlet temperature signal fails, or the pressure sensor signal fails, the first fault analysis unit determines that the condenser operation fails;

[0014] When the collector assembly temperature signal is normal, the loop outlet temperature signal is normal, and the pressure sensor signal is normal, the first fault analysis unit determines that the state of the condenser is normal.

[0015] Furthermore, the fault analysis module is provided with a second fault analysis unit. When the state of the condenser is normal, the second fault analysis unit performs a secondary judgment on the operation fault of the condenser according to the inclinometer signal state, the motion angle b0, and the motor operation time c0, wherein:

[0016] When the inclinometer signal is normal and b1≤b0≤b2 and c0≤c1, the second fault analysis unit determines that the condenser operates normally;

[0017] When the inclinometer signal fails or b0<b1 or b0>b2 or c0>c1, the second fault analysis unit determines that the condenser operation fails;

[0018] Wherein, b1 is the first preset movement angle, b2 is the second preset movement angle, b1<b2, and c1 is the preset running time.

[0019] Furthermore, the angle analysis module analyzes the solar angle according to the acquired solar altitude angle, azimuth angle and collector assembly deviation angle. The calculation formula of the solar angle θ is as follows:

[0020] A1=cos(β×η)×sin(α×η);

[0021] A2=cos(β×η)cos(α×η);

[0022] A3 = η × sin (β);

[0023] A4=A1×cos(σ1×η)-A2×sin(σ1×η);

[0024] A5=A1×sin(σ1×η)×sin(σ2×η)+A2×sin(σ2×η)cos(σ1×η)+A3×cos(σ2×η);

[0025] Among them, when A4>0, θ=atan(A5 / A4) / n; when A4<0 and A5≥0, θ=(atan(A5 / A4)+π) / n; when A4<0 and A5 <0, θ=(atan(A5 / A4)-π) / η; when A4=0 and A5<0, θ=(-π / 2) / η; when A4=0 and A5>0, θ=(π / 2) / η;

[0026] Among them, σ1 is the deviation angle of the collector assembly relative to the north-south axis, σ2 is the deviation angle of the collector assembly relative to the horizontal plane, A1 is the intermediate calculation value 1, A2 is the intermediate calculation value 2, A3 is the intermediate calculation value 3, A4 is the intermediate calculation value 4, A5 is the intermediate calculation value 5, α is the solar azimuth angle, β is the solar altitude angle, and η is the preset correction coefficient.

[0027] Furthermore, the emergency control module is provided with a first emergency control unit. When the condenser fails to operate, the first emergency control unit controls the emergency operation mode of the condenser once according to the analysis result of the sun angle, the ambient wind speed v0 and the mother tube pressure f0, wherein:

[0028] When v0≤v1 and f0>f1, the first emergency control unit maintains the current operating state of the condenser;

[0029] When v0>v1 and f0≤f1, the first emergency control unit controls the emergency operation mode of the condenser to emergency storage;

[0030] Among them, v1 is the preset wind speed and f1 is the preset main pipe pressure.

[0031] Furthermore, the emergency control module is provided with a second emergency control unit. When the first emergency control unit maintains the current operating state of the condenser, the second emergency control unit performs secondary control on the emergency operating mode of the condenser according to the analysis result of the sun angle, the mother pipe flow d0, the heat mother pipe temperature h0 and the signal state of the heat transfer oil circulation pump, wherein:

[0032] When the signal of the heat transfer oil circulation pump is normal, if d0≤d1 or h0≥h1, the second emergency control unit controls the emergency operation mode of the condenser to emergency defocusing, and controls the condenser to follow the sun according to the sun angle θ, and if d0>d1 or h0

[0033] When the heat transfer oil circulation pump signal fails, the second emergency control unit controls the emergency operation mode of the condenser to emergency defocusing, and controls the condenser to follow the sun according to the sun angle θ;

[0034] Among them, d1 is the preset mother pipe flow rate, and h1 is the preset hot mother pipe temperature.

[0035] Furthermore, the emergency control module is provided with a state judgment unit, and the state judgment unit judges the safety state of the condenser according to the control result of the emergency operation mode of the condenser, wherein:

[0036] When the second control unit maintains the current operating state of the condenser, the state judgment unit determines that the safety state of the condenser is normal;

[0037] When the second emergency control unit controls the emergency operation mode of the condenser mirror to be emergency defocusing, the state judgment unit determines that the safety state of the condenser mirror is abnormal.

[0038] Furthermore, the operation control module is provided with an operation control unit. When the safety state of the concentrator is normal, the operation control unit controls the delay time and the defocus angle of the concentrator according to the analysis result of the sun angle, the collector assembly temperature y0 and the loop outlet temperature x0, wherein:

[0039] When y0≤y1 and x0≤x1, the operation control unit sets the delay time of the condenser to R1, and sets R1=0; the operation control unit sets the defocus angle of the condenser to P1, and sets P1=0;

[0040] When y0>y1 and x0≤x1, the operation control unit sets the delay time of the condenser to R2, setting R2=r0; the operation control unit sets the defocus angle of the condenser to P2, setting P2=p0;

[0041] ​When y0≤y1 and x0>x1, the operation control unit sets the delay time of the condenser to R3, setting R3=r1; the operation control unit sets the defocus angle of the condenser to P3, setting P3=p0;

[0042] When y0>y1 and x0>x1, the operation control unit sets the delay time of the condenser to R4, setting R4=r1; the operation control unit sets the defocus angle of the condenser to P4, setting P4=p1;

[0043] The operation control unit controls the condenser to follow the sun with a delay time Rr and a defocus angle Pp according to a sun angle θ;

[0044] Among them, y1 is the preset collector assembly temperature threshold, x1 is the preset loop outlet temperature threshold, r0 is the first preset time length, r1 is the second preset time length, r0<r1, p0 is the first preset defocusing angle, p1 is the second preset defocusing angle, p0<p1, Rr is the analysis result of the condenser delay time length, and Pp is the analysis result of the condenser defocusing angle.

[0045] Furthermore, the operation control module is provided with a first adjustment unit, which compares the curvature radius j0 of the condenser with the preset curvature radius j1, and adjusts the control process of the condenser defocus angle once according to the comparison result, wherein:

[0046] When j0≤j1, the first adjustment unit determines that the curvature radius of the condenser is normal and does not make any adjustment;

[0047] When j0>j1, the first adjustment unit determines that the curvature radius of the condenser is abnormal, and adjusts the control process of the condenser defocus angle, and sets the adjusted first preset defocus angle to p0', and sets p0'=p0×[1+sin(j0-j1)×(π / 2) / (j0+j1)]; sets the adjusted second preset defocus angle to p1', and sets p1'=p1×[1+sin(j0-j1)×(π / 2) / (j0+j1)].

[0048] Furthermore, the operation control module is provided with a second adjustment unit, which compares the focal length s0 of the condenser with the preset focal length s1, and performs a secondary adjustment on the control process of the condenser defocus angle according to the comparison result, wherein:

[0049] When s0≤s1, the second adjustment unit determines that the focal length of the condenser is normal and does not make any adjustment;

[0050] When s0>s1, the second adjustment unit determines that the focal length of the condenser is abnormal, and performs a second adjustment on the control process of the condenser defocus angle, and sets the adjusted preset curvature radius as j1', and sets j1'=j1×{1-I n[1+(s0-s1) / (s0+s1)] / I n2}.

[0051] Compared with the prior art, the beneficial effects of the present invention are that the fault analysis module improves the accuracy of judging the faults of the condenser operation by setting each preset motion angle and preset operating time, thereby improving the accuracy of the emergency operation mode of the condenser; the angle analysis module improves the accuracy of the sun angle analysis by setting a preset correction coefficient, thereby improving the accuracy of the operation control of the condenser, and ultimately improving the control efficiency and control stability of the photothermal mirror plant; the emergency control module improves the accuracy of the emergency operation mode control of the condenser by setting a preset wind speed and a preset mother pipe pressure, thereby improving the accuracy of the operation control of the condenser; the preset mother pipe flow and the preset heat mother pipe temperature are set to improve the accuracy of the emergency operation mode control of the condenser, thereby improving The accuracy of the condenser operation control is improved. The operation control module sets a preset collector assembly temperature threshold and a preset loop outlet temperature threshold to improve the accuracy of the condenser delay time and the defocus angle analysis, thereby improving the accuracy of the condenser operation control. The preset curvature radius is set to improve the accuracy of the condenser defocus angle control, so as to reduce the adverse effect of the excessive condenser curvature radius on the defocus angle control, thereby improving the accuracy of the condenser operation control. The preset focal length is set to improve the accuracy of the condenser defocus angle control, so as to reduce the adverse effect of the excessive condenser focal length on the defocus angle control, thereby improving the accuracy of the condenser operation control, and ultimately improving the control efficiency and control stability of the photothermal mirror plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic diagram of the structure of an intelligent control system for a solar thermal mirror field according to this embodiment;

[0053] Figure 2 This is a schematic diagram of the structure of the fault analysis module of this embodiment;

[0054] Figure 3 This is a schematic diagram of the structure of the emergency control module of this embodiment;

[0055] Figure 4 This is a schematic diagram of the structure of the operation control module of this embodiment. DETAILED DESCRIPTION

[0056] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0057] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0058] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] See also Figure 1 As shown, it is a structural schematic diagram of an intelligent control system for a solar thermal mirror field in this embodiment, and the system includes:

[0060] An information acquisition module is used to obtain the operation information, environmental information and parameters of the condenser; the operation information of the condenser includes the mother tube pressure, mother tube flow, hot mother tube temperature, condenser movement angle, motor operation time, collector assembly temperature and loop outlet temperature; the environmental information is the ambient wind speed; the condenser parameters include the radius of curvature of the condenser and the focal length of the condenser; the wood tube pressure can be obtained through the pressure sensor installed on the mother tube, the mother tube flow can be obtained through the flowmeter installed on the mother tube, the hot mother tube temperature can be obtained through the temperature sensor installed on the mother tube, the condenser movement angle can be obtained through the inclinometer installed on the condenser, the collector assembly temperature can be obtained through the temperature sensor installed on the collector tube, the loop outlet temperature can be obtained through the temperature sensor installed on the loop outlet pipe, and the ambient wind speed can be obtained through the micro-meteorological station installed in the mirror field; the condenser parameters can be obtained through interaction;

[0061] A data transmission module, used for transmitting the operation information, environmental information and parameters of the condenser to the soft controller and storing the transmitted data, the data transmission module is connected to the information acquisition module;

[0062] A fault analysis module is used to judge the operation fault of the condenser according to the inclinometer signal state, movement angle, motor operation time, collector assembly temperature signal state, circuit outlet temperature signal state and pressure sensor signal state of the condenser; the fault analysis module is connected to the data transmission module;

[0063] An angle analysis module, used to obtain the altitude angle and azimuth angle of the sun, and analyze the sun angle according to the altitude angle and azimuth angle of the sun, the angle analysis module is connected to the fault analysis module;

[0064] An emergency control module, used to control the emergency operation mode of the condenser and judge the safety state of the condenser according to the control result, the emergency control module is connected with the fault analysis module and the angle analysis module;

[0065] The operation control module is used to control the delay time and defocus angle of the condenser, and adjust the control process of the condenser defocus angle according to the curvature radius of the condenser and the focal length of the condenser. The operation control module is connected to the emergency control module.

[0066] See also Figure 2 As shown, it is a schematic diagram of the structure of the fault analysis module of this embodiment, and the fault analysis module includes:

[0067] The first fault analysis unit is used to make a judgment on the operation fault of the condenser according to the mother pipe pressure, the collector assembly temperature and the loop outlet temperature;

[0068] The second fault analysis unit is used to make a secondary judgment on the operation fault of the condenser according to the primary judgment result of the operation fault of the condenser, the angle change of the condenser, the movement range, and the operation time of the motor. The second fault analysis unit is connected to the first fault analysis unit.

[0069] See also Figure 3 As shown, it is a schematic diagram of the structure of the emergency control module of this embodiment, and the emergency control module includes:

[0070] The first emergency control unit is used to control the emergency operation mode of the condenser based on the analysis results of the condenser operation failure, the analysis results of the sun angle, the ambient wind speed and the mother tube pressure;

[0071] The second emergency control unit is used for secondary control of the emergency operation mode of the condenser according to the primary control result of the emergency operation mode of the condenser, the analysis result of the sun angle, the mother pipe flow, the heat mother pipe temperature and the operation status of the heat transfer oil circulation pump. The second emergency control unit is connected to the first emergency control unit.

[0072] See also Figure 4 As shown, it is a schematic diagram of the structure of the operation control module of this embodiment, and the operation control module includes:

[0073] An operation control unit is used to control the delay time and defocus angle of the concentrator according to the judgment result of the safety state of the concentrator, the analysis result of the sun angle, the temperature of the collector assembly and the temperature of the circuit outlet;

[0074] A first adjustment unit, used for adjusting the control process of the defocus angle of the condenser according to the curvature radius of the condenser, and the first adjustment unit is connected to the operation control unit;

[0075] The second adjustment unit is used for performing secondary adjustment on the control process of the defocus angle of the condenser according to the focal length of the condenser, and the second adjustment unit is connected to the first adjustment unit.

[0076] Specifically, the intelligent control system for a solar thermal mirror field described in this embodiment is applied to a controller of a solar thermal mirror plant. The operating failures of the concentrators and the sun angle are analyzed, and the emergency operating mode of the concentrators is controlled according to the analysis results. The operating state of the concentrators is controlled according to the control results, thereby improving the control efficiency and control stability of the solar thermal mirror plant.

[0077] Specifically, the data transmission module uses the MQTT communication protocol to transmit the operation information, fault information and environmental information of the condenser to the soft controller through the 4G / 5G network, and stores the transmitted data through the MySQL database.

[0078] Specifically, the soft controller described in this embodiment is a software system based on an operating system, such as a Wi ndows or Linux operating system. Its main function is to execute control tasks and process process data. When executing control tasks, the soft controller identifies each LOC through parameter configuration, port settings, and target device ID. The control process is implemented inside the soft controller and does not require physical connection. In terms of data security, the LOC is identified and authenticated through the TLS / SSL encryption and authentication mechanism, and the field device data is converted into data that can be recognized by the MySQL database through the MQTT protocol. It is worth noting that since the MQTT protocol works on the TCP / IP protocol family, the soft controller and the edge gateway can be connected to the local area network, the Internet, the mobile Internet, etc.; based on the characteristics of the large area and wide distribution of the trough-type photothermal mirror field, the edge gateway and the soft controller can be used to access the mobile Internet and achieve communication through the 4G / 5G network.

[0079] Specifically, in this embodiment, the types of communication protocols and databases are not specifically limited. Those skilled in the art can set them freely as long as the setting requirements of the communication protocols and database types are met. For example, the communication protocol can also be set to CoAP, HTTP, LoRaWAN, Zigbee, etc., and the database can also use Oracle, DB2, SQLServer, Access, PostgreSQL, etc.

[0080] Specifically, the first fault analysis unit makes a judgment on the operation fault of the condenser according to the temperature signal state of the collector assembly, the temperature signal state of the circuit outlet and the signal state of the pressure sensor, wherein:

[0081] When the collector assembly temperature signal fails, the circuit outlet temperature signal fails, or the pressure sensor signal fails, the first fault analysis unit determines that the condenser operation fails;

[0082] When the collector assembly temperature signal is normal, the loop outlet temperature signal is normal, and the pressure sensor signal is normal, the first fault analysis unit determines that the state of the condenser is normal.

[0083] Specifically, the collector assembly temperature signal status, loop outlet temperature signal status and pressure sensor signal status include normal signals and abnormal signals, which can be obtained through a bad quality detection instrument built into the condenser.

[0084] Specifically, when the state of the condenser is normal, the second fault analysis unit performs a secondary judgment on the operation fault of the condenser according to the inclinometer signal state, the motion angle b0, and the motor operation time c0, wherein:

[0085] When the inclinometer signal is normal and b1≤b0≤b2 and c0≤c1, the second fault analysis unit determines that the condenser operates normally;

[0086] When the inclinometer signal fails or b0<b1 or b0>b2 or c0>c1, the second fault analysis unit determines that the condenser operation fails;

[0087] Wherein, b1 is the first preset movement angle, b2 is the second preset movement angle, b1<b2, and c1 is the preset running time.

[0088] Specifically, the second fault analysis unit improves the accuracy of judging the operation fault of the condenser by setting each preset movement angle and preset operation time, thereby improving the accuracy of the emergency operation mode of the condenser, thereby improving the accuracy of the operation control of the condenser, and finally improving the control efficiency and control stability of the photothermal mirror plant; in this embodiment, no specific limitation is made on the setting of each preset movement angle and preset operation time, and technical personnel in this field can set them freely, as long as the setting requirements of each preset movement angle and preset operation time are met, among which the best value of b1 is -14.5°, the best value of b2 is 181.5°, and the best value of c1 is 15min. It is worth noting that the inclinometer signal status described in this embodiment includes normal inclinometer signal and abnormal inclinometer signal, which can be obtained through the built-in bad quality detection instrument of the condenser.

[0089] Specifically, the angle analysis module analyzes the solar angle according to the acquired solar altitude angle, azimuth angle and collector assembly deviation angle. The calculation formula of the solar angle θ is as follows:

[0090] A1=cos(β×η)×sin(α×η);

[0091] A2=cos(β×η)cos(α×η);

[0092] A3 = η × sin (β);

[0093] A4=A1×cos(σ1×η)-A2×sin(σ1×η);

[0094] A5=A1×sin(σ1×η)×sin(σ2×η)+A2×sin(σ2×η)cos(σ1×η)+A3×cos(σ2×η);

[0095] Among them, when A4>0, θ=atan(A5 / A4) / n; when A4<0 and A5≥0, θ=(atan(A5 / A4)+π) / n; when A4<0 and A5 <0, θ=(atan(A5 / A4)-π) / η; when A4=0 and A5<0, θ=(-π / 2) / η; when A4=0 and A5>0, θ=(π / 2) / η;

[0096] Among them, σ1 is the deviation angle of the collector assembly relative to the north-south axis, σ2 is the deviation angle of the collector assembly relative to the horizontal plane, A1 is the intermediate calculation value 1, A2 is the intermediate calculation value 2, A3 is the intermediate calculation value 3, A4 is the intermediate calculation value 4, A5 is the intermediate calculation value 5, α is the solar azimuth angle, β is the solar altitude angle, and η is the preset correction coefficient.

[0097] Specifically, the angle analysis module improves the accuracy of solar angle analysis by setting a preset correction coefficient, thereby improving the accuracy of the operation control of the concentrator, and ultimately improving the control efficiency and control stability of the photothermal mirror plant; in this embodiment, the value of the preset correction coefficient is not specifically limited, and technical personnel in this field can set it freely, and it is only necessary to meet the value requirement of the preset correction coefficient, wherein the optimal value of η is 0.017453292519943295769236907684886. It is worth noting that in this embodiment, the method for obtaining the solar altitude angle and the azimuth angle is not specifically limited, and technical personnel in this field can set it freely, and it is only necessary to meet the acquisition requirements of the solar altitude angle and the azimuth angle, wherein the solar altitude angle and the azimuth angle can be obtained through the public solar position algorithm based on radiation application provided by the National Renewable Energy Laboratory (NREL).

[0098] Specifically, when the condenser fails to operate, the first emergency control unit controls the emergency operation mode of the condenser once according to the analysis result of the sun angle, the ambient wind speed v0 and the mother tube pressure f0, wherein:

[0099] When v0≤v1 and f0>f1, the first emergency control unit maintains the current operating state of the condenser;

[0100] When v0>v1 and f0≤f1, the first emergency control unit controls the emergency operation mode of the condenser to emergency storage;

[0101] Among them, v1 is the preset wind speed and f1 is the preset main pipe pressure.

[0102] Specifically, the first emergency control unit improves the accuracy of the control of the emergency operation mode of the condenser by setting the preset wind speed and the preset mother pipe pressure, thereby improving the accuracy of the operation control of the condenser, and ultimately improving the control efficiency and control stability of the photothermal mirror plant; in this embodiment, the values ​​of the preset wind speed and the preset mother pipe pressure are not specifically limited, and technical personnel in this field can set them freely, as long as the value requirements of the preset wind speed and the preset mother pipe pressure are met, among which the optimal value of v1 is 14m / s, and the optimal value of f1 is 0.4MPa.

[0103] Specifically, when the first emergency control unit maintains the current operating state of the condenser, the second emergency control unit controls the emergency operating mode of the condenser for a second time according to the analysis result of the sun angle, the mother pipe flow d0, the heat mother pipe temperature h0 and the signal state of the thermal oil circulation pump, wherein:

[0104] When the signal of the heat transfer oil circulation pump is normal, if d0≤d1 or h0≥h1, the second emergency control unit controls the emergency operation mode of the condenser to emergency defocusing, and controls the condenser to follow the sun according to the sun angle θ, and if d0>d1 or h0

[0105] When the heat transfer oil circulation pump signal fails, the second emergency control unit controls the emergency operation mode of the condenser to emergency defocusing, and controls the condenser to follow the sun according to the sun angle θ;

[0106] Among them, d1 is the preset mother pipe flow rate, and h1 is the preset hot mother pipe temperature.

[0107] Specifically, when the second emergency control unit controls the operation mode of the condenser to emergency defocusing, the defocusing angle is set to 5°, and the accuracy of the emergency operation mode control of the condenser is improved by setting the preset mother tube flow rate and the preset hot mother tube temperature, thereby improving the accuracy of the condenser operation control, and finally improving the control efficiency and control stability of the photothermal mirror plant; in this embodiment, the values ​​of the preset mother tube flow rate and the preset hot mother tube temperature are not specifically limited, and those skilled in the art can freely set them, as long as the value requirements of the preset mother tube flow rate and the preset hot mother tube temperature are met, where the optimal value of d1 is 1.51m 3 / s, the best value of h1 is 399℃. It is worth noting that the signal status of the heat transfer oil circulation pump includes normal signal and abnormal signal, which can be obtained through the built-in bad quality detection instrument of the condenser.

[0108] Specifically, the state judgment unit judges the safety state of the condenser according to the control result of the emergency operation mode of the condenser, wherein:

[0109] When the second control unit maintains the current operating state of the condenser, the state judgment unit determines that the safety state of the condenser is normal;

[0110] When the second emergency control unit controls the emergency operation mode of the condenser mirror to be emergency defocusing, the state judgment unit determines that the safety state of the condenser mirror is abnormal.

[0111] Specifically, when the safety state of the concentrator is normal, the operation control unit controls the delay time and defocus angle of the concentrator according to the analysis result of the sun angle, the collector assembly temperature y0 and the loop outlet temperature x0, wherein:

[0112] When y0≤y1 and x0≤x1, the operation control unit sets the delay time of the condenser to R1, and sets R1=0; the operation control unit sets the defocus angle of the condenser to P1, and sets P1=0;

[0113] ​When y0>y1 and x0≤x1, the operation control unit sets the delay time of the condenser to R2, setting R2=r0; the operation control unit sets the defocus angle of the condenser to P2, setting P2=p0;

[0114] When y0≤y1 and x0>x1, the operation control unit sets the delay time of the condenser to R3, setting R3=r1; the operation control unit sets the defocus angle of the condenser to P3, setting P3=p0;

[0115] When y0>y1 and x0>x1, the operation control unit sets the delay time of the condenser to R4, setting R4=r1; the operation control unit sets the defocus angle of the condenser to P4, setting P4=p1;

[0116] The operation control unit controls the condenser to follow the sun with a delay time Rr and a defocus angle Pp according to a sun angle θ;

[0117] Among them, y1 is the preset collector assembly temperature threshold, x1 is the preset loop outlet temperature threshold, r0 is the first preset time length, r1 is the second preset time length, r0<r1, p0 is the first preset defocusing angle, p1 is the second preset defocusing angle, p0<p1, Rr is the analysis result of the condenser delay time length, and Pp is the analysis result of the condenser defocusing angle.

[0118] Specifically, the operation control unit sets a preset collector assembly temperature threshold and a preset loop outlet temperature threshold to improve the accuracy of the condenser delay time and defocus angle analysis, thereby improving the accuracy of the condenser operation control, and ultimately improving the control efficiency and control stability of the photothermal mirror plant; in this embodiment, there is no specific limitation on the values ​​of the preset collector assembly temperature threshold, the preset loop outlet temperature threshold, each preset time, and each preset defocus angle, and those skilled in the art can set them freely, as long as the value requirements of the preset collector assembly temperature threshold, the preset loop outlet temperature threshold, each preset time, and each preset defocus angle are met, among which the optimal value of x1 is 387°C, the optimal value of y1 is 347°C, the optimal value of r0 is 2s, the optimal value of r1 is 20s, the optimal value of p0 is 4°, and the optimal value of p1 is 5°.

[0119] Specifically, the first adjustment unit compares the curvature radius j0 of the condenser with the preset curvature radius j1, and adjusts the control process of the condenser defocus angle once according to the comparison result, wherein:

[0120] When j0≤j1, the first adjustment unit determines that the curvature radius of the condenser is normal and does not make any adjustment;

[0121] When j0>j1, the first adjustment unit determines that the curvature radius of the condenser is abnormal, and adjusts the control process of the condenser defocus angle, and sets the adjusted first preset defocus angle to p0', and sets p0'=p0×[1+sin(j0-j1)×(π / 2) / (j0+j1)]; sets the adjusted second preset defocus angle to p1', and sets p1'=p1×[1+sin(j0-j1)×(π / 2) / (j0+j1)].

[0122] Specifically, the first adjustment unit improves the accuracy of controlling the defocus angle of the condenser by setting a preset curvature radius, so as to reduce the adverse effects of the excessively large curvature radius of the condenser on the defocus angle control, thereby improving the accuracy of the operation control of the condenser, and ultimately improving the control efficiency and control stability of the photothermal mirror plant; in this implementation, there is no specific limitation on the setting of the preset curvature radius, and technical personnel in this field can set it freely, as long as the setting requirements of the preset curvature radius are met, wherein the optimal value of the preset curvature radius is 50m.

[0123] Specifically, the second adjustment unit compares the focal length s0 of the condenser with the preset focal length s1, and performs secondary adjustment on the control process of the condenser defocus angle according to the comparison result, wherein:

[0124] When s0≤s1, the second adjustment unit determines that the focal length of the condenser is normal and does not make any adjustment;

[0125] When s0>s1, the second adjustment unit determines that the focal length of the condenser is abnormal, and performs a second adjustment on the control process of the condenser defocus angle, and sets the adjusted preset curvature radius as j1', and sets j1'=j1×{1-I n[1+(s0-s1) / (s0+s1)] / I n2}.

[0126] Specifically, the second adjustment unit improves the accuracy of controlling the defocus angle of the condenser by setting a preset focal length, so as to reduce the adverse effects of the excessive focal length of the condenser on the defocus angle control, thereby improving the accuracy of the condenser operation control, and ultimately improving the control efficiency and control stability of the photothermal mirror plant; in this implementation, there is no specific limitation on the setting of the preset focal length, and technical personnel in this field can set it freely, as long as the setting requirements of the preset focal length are met. Among them, when the condenser is a Fresnel lens, the optimal value of the preset focal length is 2m.

[0127] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An intelligent control system for a solar thermal mirror field, characterized in that: include, An information acquisition module is used to obtain the operation information, environmental information and condenser parameters of the condenser; A data transmission module is used to transmit the operation information, environmental information and parameters of the condenser to the soft controller and store the transmitted data; A fault analysis module is used to judge the operation fault of the condenser according to the inclinometer signal state, movement angle, motor operation time, collector assembly temperature signal state, circuit outlet temperature signal state and pressure sensor signal state of the condenser; Angle analysis module, used to obtain the altitude angle and azimuth angle of the sun, and analyze the sun angle according to the altitude angle and azimuth angle of the sun; An emergency control module is used to control the emergency operation mode of the condenser and judge the safety status of the condenser according to the control result; The operation control module is used to control the delay time and defocus angle of the condenser, and adjust the control process of the defocus angle of the condenser according to the curvature radius of the condenser and the focal length of the condenser; The angle analysis module analyzes the solar angle according to the acquired solar altitude angle, azimuth angle and collector assembly deviation angle. The calculation formula of the solar angle θ is as follows: A1=cos(β×η)×sin(α×η); A2=cos(β×η)×cos(α×η); A3 = η × sin(β); A4=A1×cos(σ1×η)- A2×sin(σ1×η); A5=A1×sin(σ1×η)×sin(σ2×η)+ A2×sin(σ2×η)cos(σ1×η)+ A3×cos(σ2×η); Among them, when A4>0, θ=atan(A5 / A4) / η; when A4<0 and A5≥0, θ= (atan(A5 / A4)+π) / η; when A4<0 and A5<0, θ= (atan(A5 / A4)-π) / η; when A4=0 and A5<0, θ=(-π / 2) / η; when A4=0 and A5>0, θ=(π / 2) / η; Among them, σ1 is the deviation angle of the collector assembly relative to the north-south axis, σ2 is the deviation angle of the collector assembly relative to the horizontal plane, A1 is the intermediate calculation value 1, A2 is the intermediate calculation value 2, A3 is the intermediate calculation value 3, A4 is the intermediate calculation value 4, A5 is the intermediate calculation value 5, α is the solar azimuth angle, β is the solar altitude angle, and η is the preset correction coefficient.

2. The intelligent control system for solar thermal mirror field according to claim 1 is characterized in that: The first fault analysis unit makes a judgment on the operation fault of the condenser according to the temperature signal state of the collector assembly, the temperature signal state of the circuit outlet and the pressure sensor signal state, wherein: When the collector assembly temperature signal fails, the circuit outlet temperature signal fails, or the pressure sensor signal fails, the first fault analysis unit determines that the condenser operation fails; When the collector assembly temperature signal is normal, the loop outlet temperature signal is normal, and the pressure sensor signal is normal, the first fault analysis unit determines that the state of the condenser is normal.

3. The intelligent control system for solar thermal mirror field according to claim 2 is characterized in that: The fault analysis module is provided with a second fault analysis unit. When the state of the condenser is normal, the second fault analysis unit performs a secondary judgment on the operation fault of the condenser according to the inclinometer signal state, the motion angle b0, and the motor operation time c0, wherein: When the inclinometer signal is normal and b1≤b0≤b2 and c0≤c1, the second fault analysis unit determines that the condenser operates normally; When the inclinometer signal fails or b0<b1 or b0>b2 or c0>c1, the second fault analysis unit determines that the condenser operation fails; Wherein, b1 is the first preset movement angle, b2 is the second preset movement angle, b1<b2, and c1 is the preset running time.

4. The intelligent control system for solar thermal mirror field according to claim 3 is characterized in that: The emergency control module is provided with a first emergency control unit. When the condenser fails to operate, the first emergency control unit controls the emergency operation mode of the condenser once according to the analysis result of the sun angle, the ambient wind speed v0 and the mother tube pressure f0, wherein: When v0≤v1 and f0>f1, the first emergency control unit maintains the current operating state of the condenser; When v0>v1 and f0≤f1, the first emergency control unit controls the emergency operation mode of the condenser to emergency storage; Among them, v1 is the preset wind speed and f1 is the preset main pipe pressure.

5. The intelligent control system for solar thermal mirror field according to claim 4 is characterized in that: The emergency control module is provided with a second emergency control unit. When the first emergency control unit maintains the current operating state of the condenser, the second emergency control unit performs secondary control of the emergency operating mode of the condenser according to the analysis result of the sun angle, the mother pipe flow d0, the heat mother pipe temperature h0 and the signal state of the heat transfer oil circulation pump, wherein: When the signal of the heat transfer oil circulation pump is normal, if d0≤d1 or h0≥h1, the second emergency control unit controls the emergency operation mode of the condenser to emergency defocusing, and controls the condenser to follow the sun according to the sun angle θ, and if d0>d1 or h0<h1, the second emergency control unit maintains the current operation state of the condenser; When the heat transfer oil circulation pump signal fails, the second emergency control unit controls the emergency operation mode of the condenser to emergency defocusing, and controls the condenser to follow the sun according to the sun angle θ; Among them, d1 is the preset mother pipe flow rate, and h1 is the preset hot mother pipe temperature.

6. The intelligent control system for a solar thermal mirror field according to claim 5, characterized in that: The emergency control module is provided with a state judgment unit, and the state judgment unit judges the safety state of the condenser according to the control result of the emergency operation mode of the condenser, wherein: When the second control unit maintains the current operating state of the condenser, the state judgment unit determines that the safety state of the condenser is normal; When the second emergency control unit controls the emergency operation mode of the condenser mirror to be emergency defocusing, the state judgment unit determines that the safety state of the condenser mirror is abnormal.

7. The intelligent control system for a solar thermal mirror field according to claim 6 is characterized in that: The operation control module is provided with an operation control unit. When the safety state of the concentrator is normal, the operation control unit controls the delay time and the defocus angle of the concentrator according to the analysis result of the sun angle, the collector assembly temperature y0 and the loop outlet temperature x0, wherein: When y0≤y1 and x0≤x1, the operation control unit sets the delay time of the condenser to R1, and sets R1=0; the operation control unit sets the defocus angle of the condenser to P1, and sets P1=0; When y0>y1 and x0≤x1, the operation control unit sets the delay time of the condenser to R2, setting R2=r0; the operation control unit sets the defocus angle of the condenser to P2, setting P2=p0; When y0≤y1 and x0>x1, the operation control unit sets the delay time of the condenser to R3, setting R3=r1; the operation control unit sets the defocus angle of the condenser to P3, setting P3=p0; When y0>y1 and x0>x1, the operation control unit sets the delay time of the condenser to R4, setting R4=r1; the operation control unit sets the defocus angle of the condenser to P4, setting P4=p1; The operation control unit controls the condenser to follow the sun with a delay time Rr and a defocus angle Pp according to a sun angle θ; Among them, y1 is the preset collector assembly temperature threshold, x1 is the preset loop outlet temperature threshold, r0 is the first preset time length, r1 is the second preset time length, r0<r1, p0 is the first preset defocusing angle, p1 is the second preset defocusing angle, p0<p1, Rr is the analysis result of the condenser delay time length, and Pp is the analysis result of the condenser defocusing angle.

8. The intelligent control system for solar thermal mirror field according to claim 7 is characterized in that: The operation control module is provided with a first adjustment unit, which compares the curvature radius j0 of the condenser with the preset curvature radius j1, and adjusts the control process of the condenser defocus angle according to the comparison result, wherein: When j0≤j1, the first adjustment unit determines that the curvature radius of the condenser is normal and does not make any adjustment; When j0>j1, the first adjustment unit determines that the curvature radius of the condenser is abnormal, and adjusts the control process of the condenser defocus angle, and sets the adjusted first preset defocus angle to p0', setting p0'=p0×[1+sin(j0-j1)×(π / 2) / (j0+j1)]; sets the adjusted second preset defocus angle to p1', and sets p1'=p1×[1+sin(j0-j1)×(π / 2) / (j0+j1)].

9. The intelligent control system for a solar thermal mirror field according to claim 8, characterized in that: The operation control module is provided with a second adjustment unit, which compares the focal length s0 of the condenser with the preset focal length s1, and performs a secondary adjustment on the control process of the condenser defocus angle according to the comparison result, wherein: When s0≤s1, the second adjustment unit determines that the focal length of the condenser is normal and does not make any adjustment; When s0>s1, the second adjustment unit determines that the focal length of the condenser is abnormal, and performs a second adjustment on the control process of the condenser defocus angle, and sets the adjusted preset curvature radius as j1', setting j1'=j1×{1-In[1+(s0-s1) / (s0+s1)] / In2}.

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