Auxiliary equipment for trough concentrating photovoltaic sun-alignment accurate orientation

Abstract

The utility model discloses an auxiliary device for groove-type concentrating photovoltaic sun-alignment accurate orientation, which belongs to the technical field of photovoltaic power generation and comprises photosensitive battery components fixed at two ends of a secondary concentrating receiver. Each photosensitive battery assembly comprises a first photosensitive battery, a second photosensitive battery, a power supply battery and a radio frequency generator. The radio frequency generator comprises an amplifier, a first comparator, a second comparator and a transmitting module; the positive electrode of the first photosensitive battery and the negative electrode of the second photosensitive battery are connected with one input terminal of the amplifier. The negative electrode of the first photosensitive battery and the positive electrode of the second photosensitive battery are connected with the other input terminal of the amplifier. The output terminal of the amplifier is respectively connected with the positive terminal of the first comparator and the negative terminal of the second comparator; the output terminal of the first comparator and the output terminal of the second comparator are connected with the function terminal of the transmitting module; the power supply battery is connected with a power supply terminal of the transmitting module; the transmitting module is in wireless communication with a rotating mechanism of the photovoltaic support.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic power generation technical field, more particularly to a kind of for trough type concentrating photovoltaic sun precision orientation auxiliary equipment. BACKGROUND

[0002] As known, trough solar thermal power generation technology is a kind of technology using trough parabolic concentrator mirror to focus sunlight on focal line, so as to realize high efficiency energy conversion. Specifically, this technology converges sunlight on a narrow focal line through a series of trough parabolic mirrors. On these focal lines, tubular heat collectors are installed, which can absorb focused solar radiation. When the fluid in the tube is heated, it flows through the heat exchanger, and then heats water to produce steam. These steam is then used to drive the steam power cycle to ultimately achieve the purpose of power generation.

[0003] Traditional trough concentrating photovoltaic system, as shown in Figure 1 , is mainly composed of several key components, including reflector, secondary light focusing receiver and photovoltaic support, etc. In this system, sunlight is first reflected by the reflector, and then reflected by the secondary light focusing receiver, and finally absorbed. In order to maximize the use of solar energy, as shown in Figure 2 and Figure 3 , the core components of the secondary light focusing receiver of trough concentrating photovoltaic include collection tube, solar cell assembly, glass packaging tube and PCB board. The solar cell assembly is tightly installed on the outer wall of the collection tube, and the glass packaging tube plays a sealing role, covering the outer periphery of the heat pipe, solar cell assembly and PCB board. Inside the collection tube, cooling liquid flows to collect the heat generated by the solar cell. The PCB board is firmly fixed on the collection tube, which not only effectively conducts the heat on the solar cell assembly to the collection tube, but also undertakes the important task of connecting the solar cell circuit.

[0004] The traditional trough concentrating photovoltaic system uses NASA's calendar photovoltaic data to calculate the optimal inclination angle of the target ground and sunlight. Through the inclination sensor, the system can monitor its angle in real time and transmit these data to the adjusting mechanism. The adjusting mechanism corrects the angle of the photovoltaic support according to the algorithm in the control program to ensure that the inclination angle of the photovoltaic support and sunlight reaches the optimal state, so as to maximize the use of solar energy.

[0005] However, the current adjusting mechanism of the trough-type concentrating photovoltaic system has low precision, with the highest accuracy of 0.5°. Due to the precision limitation of the adjusting mechanism, the ability of the photovoltaic module to absorb and utilize solar energy cannot be maximized. This not only affects the overall efficiency of the system, but also limits its performance in practical applications. Therefore, improving the precision of the adjusting mechanism is one of the important directions for the development of future trough-type concentrating photovoltaic technology. By improving and optimizing the design of the adjusting mechanism, the performance of the trough-type concentrating photovoltaic system can be further improved, making it play a greater role in the field of solar power generation. Practical new type content

[0006] The utility model discloses satisfy actual demand, provide a kind of for the auxiliary equipment of trough-type concentrating photovoltaic sun-precision orientation, realize current difference detection using photosensitive cell, according to the current difference constantly adjusts the direction of driving shaft current greater, so that trough-type concentrating photovoltaic can maximize solar power generation.

[0007] To achieve the above technical purpose, the utility model discloses a kind of for the auxiliary equipment of trough-type concentrating photovoltaic sun-precision orientation, the trough-type concentrating photovoltaic includes photovoltaic support, and reflector and secondary light-collecting receiver are installed on the photovoltaic support;The auxiliary equipment includes photosensitive cell assembly fixed in the two ends of secondary light-collecting receiver;Each photosensitive cell assembly includes No.

[0008] The radio frequency generator includes amplifier, No. 1 comparator, No. 2 comparator and transmitting module;The positive pole of No. 1 photosensitive cell, the negative pole of No. 2 photosensitive cell are connected with the input terminal of amplifier;The negative pole of No. 1 photosensitive cell, the positive pole of No. 2 photosensitive cell are connected with the other input terminal of amplifier;The output terminal of amplifier is connected with the positive pole terminal of No. 1 comparator, the negative pole terminal of No. 2 comparator respectively;The output terminal of No. 1 comparator, the output terminal of No. 2 comparator are connected with the functional terminal of transmitting module;The power supply terminal of transmitting module is connected with power supply battery;The transmitting module carries out wireless communication with the rotating mechanism of photovoltaic support.

[0009] Preferably, the distance between the photosensitive cell assembly and the solar cell is in the range of 8cm to 10cm.

[0010] Preferably, the photosensitive cell assembly is fixed on the two ends of the secondary light-collecting receiver by bolts.

[0011] Preferably, the model of the amplifier is INA350, the model of No. 1 comparator and No. 2 comparator is LM393, and the model of the transmitting module is TXS02.

[0012] Preferably, the output terminal of the first comparator is connected with the DO terminal of the emitting module, and the output terminal of the second comparator is connected with the D1 terminal of the emitting module.

[0013] Preferably, the negative terminal of the first comparator is connected with the power supply through a first variable resistor, and the positive terminal of the second comparator is connected with the power supply through a second variable resistor.

[0014] Preferably, the amplification factor of the amplifier is 50.

[0015] Preferably, the photovoltaic support comprises a rotating adjusting structure and a plurality of coplanar and parallel rotating supports, the lower end of each rotating support is fixedly connected with the rotating adjusting structure, and the upper end of each rotating support is fixedly connected with a secondary light focusing receiver.

[0016] Preferably, the secondary light focusing receiver comprises a collecting tube, a solar cell assembly, a glass packaging tube and a PCB board, the solar cell assembly is installed on the outer wall of the collecting tube, the glass packaging tube is sealed on the outer side of the heat conducting tube, the solar cell assembly and the PCB board, the PCB board is fixed on the collecting tube, and one reflecting mirror plate is installed on each side of the solar cell assembly in the length direction.

[0017] Preferably, the reflecting mirror plate has the same length as the solar cell assembly, the included angle between the reflecting mirror plate and the solar cell assembly is 160°-175°, and the width of the solar cell assembly is 1cm-5cm.

[0018] Compared with the prior art, the application has the advantages and positive effects that:

[0019] The design of the utility model first carefully installs a photosensitive battery assembly at both ends of the secondary light focusing receiver. Each photosensitive battery assembly contains a pair of photosensitive batteries, which can sensitively detect incident light. Through these photosensitive batteries, accurate detection of current differences can be achieved. Specifically, when the photosensitive batteries receive light of different intensities, different degrees of current change will be generated. These current changes will be monitored and compared by the photosensitive batteries to obtain the current difference.

[0020] Subsequently, the emitting module will intelligently adjust according to the monitored current difference. The emitting module can identify the direction with larger current and adjust the steering of the driving shaft accordingly. The adjustment of the driving shaft is to ensure that the secondary light focusing receiver always faces the direction with larger current, so as to maximize the use of solar energy for power generation.

[0021] This design enables the trough-type concentrating photovoltaic system to capture and utilize solar energy more efficiently. Through real-time monitoring and dynamic adjustment, the utility model can maximize the energy conversion efficiency, thereby improving the power generation of the entire photovoltaic system. This auxiliary adjustment mechanism not only improves the efficiency of energy utilization, but also prolongs the service life of the photovoltaic power generation system, ensuring that it maintains the best working state under various lighting conditions. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0023] Figure 1 is a schematic diagram of a trough-type concentrating photovoltaic structure;

[0024] Figure 2 is a schematic diagram of a secondary light concentrating receiver in the preferred embodiment of the present application;

[0025] Figure 3 is an end view of the secondary light concentrating receiver in the preferred embodiment of the present application;

[0026] Figure 4 is a partial enlarged view of the secondary light concentrating receiver in the preferred embodiment of the present application;

[0027] Figure 5 is a schematic diagram of a photosensitive cell circuit in the preferred embodiment of the present application;

[0028] Figure 6 is a schematic diagram of a radio frequency generator circuit in the preferred embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] In the description of the utility model creation, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model creation and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model creation.

[0031] In the description of the utility model creation, it needs to be understood that the terms "mounting", "connection", "connection" should be understood broadly unless otherwise explicitly specified and limited, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model creation can be understood according to the specific circumstances.

[0032] As shown in Figures 1 to 6 A kind of auxiliary equipment for slot type concentrating photovoltaic precision orientation, by using photosensitive cell to realize the detection of current difference, this process involves the accurate monitoring of current variation. Specifically, photosensitive cell will continuously monitor the slight change of current, and constantly adjust the steering of driving shaft according to these changes. When the direction of larger current is detected, the driving shaft will be automatically steered to that direction, so as to ensure that the slot type concentrating photovoltaic system can maximize the use of solar energy for power generation. Further, maximize the power generation efficiency. In this way, the slot type concentrating photovoltaic system not only can more effectively capture sunlight, but also can maintain the best power generation performance under different light conditions, so as to realize higher energy utilization rate and economic benefit.

[0033] In this embodiment, the slot type concentrating photovoltaic mainly includes photovoltaic support assembly. These photovoltaic supports not only stably support the entire equipment, but also install key optical elements on them, including mirror 1 and secondary light receiving device 5. The function of mirror 1 is to focus sunlight on secondary light receiving device 5, so as to improve the photoelectric conversion efficiency.

[0034] Specifically, photovoltaic support mainly includes a rotary adjustment structure 3, which enables the entire equipment to be accurately adjusted according to the position of the sun. In addition, the photovoltaic support also includes several coplanar and parallel rotary supports 4. The lower end of these rotary supports 4 is fixedly connected with the rotary adjustment structure 3, ensuring the stability of the entire system. While the upper end of rotary support 4 is fixedly connected with secondary light receiving device 5, ensuring the accurate alignment and stable operation of optical elements.

[0035] With this design, the trough-type concentrating photovoltaic system can achieve efficient solar energy collection and conversion. The rotating adjustment structure 3 enables the system to adjust in real-time according to the sun's movement trajectory, thereby always maintaining optimal concentrating effect. The coplanar and parallel rotating supports 4 ensure the structural stability of the entire system and the precise alignment of the optical elements. The secondary concentrating receiver 5 is responsible for receiving the sunlight focused by the mirror 1, further improving the photoelectric conversion efficiency, thereby making the entire trough-type concentrating photovoltaic system have significant advantages in the field of solar power generation.

[0036] In this embodiment, the auxiliary equipment includes light-sensitive cell assemblies fixed at both ends of the secondary concentrating receiver 5. These light-sensitive cell assemblies are designed to capture and convert light into electrical energy; each light-sensitive cell assembly includes a No. 1 light-sensitive cell 9, a No. 2 light-sensitive cell 10, a power supply cell 7, a resistor 11, and a radio frequency generator. These components work together to ensure efficient operation of the system.

[0037] Specifically, the radio frequency generator includes an amplifier, a No. 1 comparator, a No. 2 comparator, and a transmission module. The role of the amplifier is to amplify the signal to facilitate subsequent comparison processing. The positive electrode of the No. 1 light-sensitive cell and the negative electrode of the No. 2 light-sensitive cell are connected to one input terminal of the amplifier, while the negative electrode of the No. 1 light-sensitive cell and the positive electrode of the No. 2 light-sensitive cell are connected to the other input terminal of the amplifier.

[0038] The output terminals of the amplifier are connected to the positive terminal of the No. 1 comparator and the negative terminal of the No. 2 comparator, respectively. In this way, the amplified signal can be further compared. The output terminals of the No. 1 comparator and the No. 2 comparator are connected to the functional terminals of the transmission module. This connection allows the processed signal to be received by the transmission module for further operation.

[0039] The power supply cell is connected to the power terminal of the transmission module, providing stable power support for the transmission module. This ensures that the transmission module will not be interrupted or unstable due to power problems during operation. Finally, the transmission module communicates wirelessly with the rotating mechanism of the photovoltaic support. This wireless communication method makes the entire system more flexible and efficient, while also reducing the complexity and cost of wiring. Through this way, the system can monitor and adjust the rotation of the photovoltaic support in real time to achieve the best concentrating effect.

[0040] The following is a non-limiting example:

[0041] The distance between the light-sensitive cell assembly and the solar cell assembly 8 is strictly limited to the range of 8 to 10 cm.

[0042] The light-sensitive battery assembly is stably installed at both end portions of the secondary light collection receiver 5 by means of bolts.

[0043] The amplifier is of INA350 type, the first comparator and the second comparator are both of LM393 type, and the transmitting module is of TXS02 type.

[0044] In terms of circuit connection, the output terminal of the first comparator is effectively connected with the DO terminal of the transmitting module, and the output terminal of the second comparator is connected with the D1 terminal of the transmitting module.

[0045] Further, the negative terminal of the first comparator is reliably connected with the power supply through a first variable resistor, and the positive terminal of the second comparator is connected with the power supply through a second variable resistor.

[0046] The amplification multiple of the amplifier is accurately set to 50 times.

[0047] As to the constitution of the secondary light collection receiver 5, it mainly comprises a collecting tube, a solar cell assembly, a glass packaging tube 6 and a PCB board. The solar cell assembly is properly installed on the outer wall of the collecting tube, and the glass packaging tube is tightly sleeved on the outer side of the heat conducting tube, the solar cell assembly and the PCB board, thus playing a good sealing role. The PCB board is fixed on the collecting tube, and at both sides of the length direction of the solar cell assembly, a reflecting mirror plate is respectively installed.

[0048] The length of the two reflecting mirror plates is the same as that of the solar cell assembly, and the included angle between them and the solar cell assembly is accurately controlled between 160° and 175°. In addition, the width of the solar cell assembly is strictly limited within the range of 1 cm to 5 cm.

[0049] In the above embodiment, since the two light-sensitive batteries receive different light, the current generated by the light-sensitive batteries is also different. Taking the example that the light received by the first light-sensitive battery is twice that of the second light-sensitive battery, the short-circuit current generated by the first light-sensitive battery is twice that of the second light-sensitive battery.

[0050] The radio frequency module RF1 adopts a standard remote control transmitting module, for example, the TXS02 type of the Internet of Things Electronics. Its function is set as: when D0, D1, D2 and D3 are respectively in low level, a fixed signal will be sent, and the radio frequency signals sent by these pins respectively represent different remote control codes. For example, if D0 maintains a low level state, and after 5 seconds, RF1 will resend the signal.

[0051] The radio frequency circuit is powered by a single cell in the battery pack, the positive and negative poles of the battery are connected to VCC and GND respectively. Under the condition of light concentration, the circuit is powered and starts to work. Due to the characteristics of the solar cell, the voltage of VCC is 3V. During the manufacturing process, the voltage of pin 2 and pin 5 of U1 is adjusted to 1V and 2V respectively by adjusting the resistance value of R5 and R4.

[0052] Since the light concentration may be deviated, when the current deviation of the first and second light-sensitive cells reaches 21mA (i.e. more than 1% of the full current, the full current is 2A), it is considered that the alignment of the cells to the sunlight is deviated, that is, the light concentration is deviated. At this time, the voltage flowing through the 500mΩ resistor is 10.5mV, and this signal is input into the circuit through I+ and I-. INA uses INA350 instrument amplifier to amplify the signal by 50 times, that is, to 525mV. The REF level value of INA350 is 1 / 2VCC, that is, 1.525V. Therefore, the output level (Vop) of pin 6 of INA is 2.025V. At this time, the level of pin 6 of LM393 is higher than that of pin 5, and the level of pin 3 is higher than that of pin 2, resulting in that the level of pin 2 of radio frequency module RF1 is low and the level of pin 1 is high, so as to send the radio frequency signal rotating outward. Conversely, the level of pin 1 of RF1 is low and the level of pin 2 is high, so as to send the radio frequency signal rotating inward (defining that the side of the light concentration cell facing the reflector as inward and the side facing away from the reflector as outward).

[0053] When the current deviation of the first and second light-sensitive cells is less than 20mA (i.e. within ±1% deviation, the full current is 2A), it is considered that the alignment is completed. At this time, the voltage flowing through the 500mΩ resistor is 10mV. After the signal is input into the circuit through I+ and I-, INA uses INA350 instrument amplifier to amplify the signal by 50 times, that is, less than 500mV. The REF level value of INA350 is less than 1 / 2VCC, that is, 1.5V. Therefore, the output level (Vop) of pin 6 of INA is less than 2V. At this time, the level of pin 5 of LM393 is higher than that of pin 6, and the level of pin 2 is lower than that of pin 3, resulting in that the levels of pin 2 and pin 1 of RF1 are high, at this time no signal is sent.

[0054] When the groove type light concentrator is not accurately aligned, the signal for modification will be continuously sent. After the controller receives the signal, it will adjust the rotation direction until the signal is lost, at this time it is considered that the adjustment is successful and the direction to the sun is accurate.

[0055] The utility model discloses two groups of photosensitive cells are arranged respectively at the axial both ends of secondary light condensation receiver. With the change of sunlight angle, the current of photosensitive cell will change accordingly. The electric signal of battery is converted into radio signal that radio frequency generator can emit through singlechip. After receiving radio signal, signal receiver will adjust driving mechanism fine adjustment light condensation groove position, thereby carries out the depth orientation to the sun on the original basis. Only the current changes, the system will repeat the above process constantly, to realize the accurate orientation to the sun, thereby capture more sunlight.

[0056] The above only is the preferred implementation of the utility model, should point out, for ordinary skill for this technical field, on the premise of not departing from the principle of the utility model, can also make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection range of the utility model.

Claims

1. An auxiliary device for precise orientation of a trough type concentrating photovoltaic to the sun, said trough type concentrating photovoltaic comprising a photovoltaic support on which a mirror (1) and a secondary concentrating receiver (5) are mounted; characterized in that, The auxiliary device comprises a photosensitive cell assembly fixed at both ends of a secondary light focusing receiver (5); each photosensitive cell assembly comprises a first photosensitive cell, a second photosensitive cell, a power supply cell and a radio frequency generator; wherein: The radio frequency generator comprises an amplifier, a first comparator, a second comparator and a transmitting module; the positive pole of the first photosensitive cell and the negative pole of the second photosensitive cell are connected with one input terminal of the amplifier; the negative pole of the first photosensitive cell and the positive pole of the second photosensitive cell are connected with another input terminal of the amplifier; the output terminal of the amplifier is connected with the positive pole terminal of the first comparator and the negative pole terminal of the second comparator respectively; the output terminal of the first comparator and the output terminal of the second comparator are connected with the functional terminal of the transmitting module; the power supply cell is connected with the power terminal of the transmitting module; and the transmitting module is in wireless communication with the rotating mechanism of the photovoltaic support.

2. Auxiliary device for the precise orientation of a trough concentrating photovoltaic system according to claim 1, characterized in that, The distance between the photosensitive cell assembly and the solar cell ranges from 8 cm to 10 cm.

3. The auxiliary device for precise sun orientation of trough concentrating photovoltaic according to claim 1, characterized in that, The photosensitive cell assembly is fixed at both ends of the secondary light focusing receiver (5) by bolts.

4. The auxiliary device for precise sun orientation of trough concentrating photovoltaic according to claim 1, characterized in that, The model of the amplifier is INA350, the model of the first comparator and the second comparator is LM393, and the model of the transmitting module is TXS02.

5. Auxiliary device for the precise orientation of a trough concentrating photovoltaic system according to claim 4, characterized in that, The output terminal of the first comparator is connected with the DO terminal of the transmitting module, and the output terminal of the second comparator is connected with the D1 terminal of the transmitting module.

6. Auxiliary device for the precise orientation of a trough concentrating photovoltaic system according to claim 4, characterized in that, The negative pole terminal of the first comparator is connected with the power supply through a first variable resistor, and the positive pole terminal of the second comparator is connected with the power supply through a second variable resistor.

7. The auxiliary device for precise sun orientation of trough concentrating photovoltaic according to claim 1, characterized in that, The amplification factor of the amplifier is 50.

8. The auxiliary device for precise sun orientation of trough concentrating photovoltaic according to claim 1, characterized in that, The photovoltaic support comprises a rotating adjusting structure (3) and a plurality of coplanar and parallel rotating supports (4), the lower end of the rotating support (4) is fixedly connected with the rotating adjusting structure (3), and the upper end of the rotating support (4) is fixedly connected with the secondary light focusing receiver (5).

9. The auxiliary device for precise sun orientation of trough concentrating photovoltaic according to claim 1, characterized in that: The secondary light focusing receiver (5) comprises a collecting tube, a solar cell assembly, a glass packaging tube (6) and a PCB board; wherein: the solar cell assembly is installed on the outer wall of the collecting tube, the glass packaging tube is sealed on the outer side of the heat conducting tube, the solar cell assembly and the PCB board, the PCB board is fixed on the collecting tube, and one reflecting mirror plate is installed on each side of the solar cell assembly in the length direction.

10. Auxiliary device for the precise orientation of a trough concentrating photovoltaic system according to claim 9, characterized in that: The reflecting mirror plate has the same length as the solar cell assembly, the included angle between the reflecting mirror plate and the solar cell assembly is 160°-175°, and the width of the solar cell assembly is 1 cm-5 cm.

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