CN217849381U - Photovoltaic tile fault detection circuit and detection device - Google Patents
Photovoltaic tile fault detection circuit and detection device Download PDFInfo
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- CN217849381U CN217849381U CN202221550014.7U CN202221550014U CN217849381U CN 217849381 U CN217849381 U CN 217849381U CN 202221550014 U CN202221550014 U CN 202221550014U CN 217849381 U CN217849381 U CN 217849381U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The application relates to photovoltaic tile fault detection field to a photovoltaic tile fault detection circuit and detection device is disclosed, this circuit includes: the device comprises a photovoltaic component, a voltage comparator, a detection circuit, a selection switch, a fault signal lamp and an optical detection unit; the voltage comparator is connected with the output end of the photovoltaic module and used for detecting a first output voltage of the photovoltaic module; the detection circuit is connected with the voltage comparator, the optical detection unit and the selection switch and is used for controlling the conduction state of the selection switch according to the second output voltage of the voltage comparator; the selection switch is further connected with the fault signal lamp and the output end of the photovoltaic module, and the fault signal lamp is connected with the input end of the photovoltaic module. This application has improved photovoltaic tile fault detection's detection efficiency.
Description
Technical Field
The utility model relates to a photovoltaic tile fault detection area especially relates to a photovoltaic tile fault detection circuit and detection device.
Background
Along with the high-speed development of photovoltaic tile power generation technology, photovoltaic tiles are used more and more on various photovoltaic power generation roofs, meanwhile, more and more attention is paid to fault detection and fault timely maintenance of the photovoltaic tiles on the photovoltaic power generation roofs, and the traditional photovoltaic tile fault detection mode is that after faults occur, a single photovoltaic module fault self-detection device collects short-circuit current and an open-circuit power supply of a photovoltaic module to detect the faults of the module. The photovoltaic tile fault detection method has the great defects that the photovoltaic tile can be subjected to fault detection after the fault occurs, and a detection device is required to be additionally arranged. Namely, the photovoltaic tile fault detection mode can detect the faults of the photovoltaic tiles by an additional detection device after the faults occur, so that the detection efficiency of the photovoltaic tile fault detection is not high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a photovoltaic tile fault detection circuit and detection device, aims at solving the technical problem who how improves photovoltaic tile fault detection's detection efficiency.
In order to achieve the above object, the present invention provides a photovoltaic tile fault detection circuit, which comprises a photovoltaic module, a voltage comparator, a detection circuit, a selection switch, a fault signal lamp and an optical detection unit;
the voltage comparator is connected with the output end of the photovoltaic module and used for detecting a first output voltage of the photovoltaic module;
the detection circuit is connected with the voltage comparator, the optical detection unit and the selection switch and is used for controlling the conduction state of the selection switch according to the second output voltage of the voltage comparator;
the selection switch is further connected with the fault signal lamp and the output end of the photovoltaic module, and the fault signal lamp is connected with the input end of the photovoltaic module.
Optionally, the voltage comparator includes a first input terminal, a second input terminal and a first output terminal, the first input terminal is connected to the output terminal of the photovoltaic module, the second input terminal is connected to the custom comparison voltage source, and the first output terminal is connected to the detection circuit.
Optionally, the voltage comparator further includes a first comparison chip and a first resistor, pin 3 of the first comparison chip is connected to the first input terminal, pin 2 of the first comparison chip is connected to the second input terminal, pin 1 of the first comparison chip is connected to the first output terminal and one end of the first resistor, the other end of the first resistor is connected to pin 8 of the first comparison chip and a system power supply, and pin 4 of the first comparison chip is connected to a system power supply ground.
Optionally, the first comparison chip is an LM399 chip.
Optionally, the detection circuit includes a second resistor, a first NPN transistor, a third resistor, and a fourth resistor, one end of the second resistor is connected to the optical detection unit as a conduction terminal, the other end of the second resistor is connected to a collector of the first NPN transistor and a first output terminal of the voltage comparator, an emitter of the first NPN transistor is connected to the system power ground, a base of the first NPN transistor is connected to one end of the third resistor and one end of the fourth resistor, the other end of the third resistor is connected to the system power ground, and the other end of the fourth resistor is connected to the selection switch.
Optionally, the selection switch includes a first terminal, a second terminal, a third terminal and a control terminal, the control terminal is connected to the detection circuit, the first terminal is connected to the output end of the photovoltaic module, the second terminal is connected to the fault signal lamp, and the third terminal is suspended.
Optionally, the first terminal is connected to the second terminal and disconnected from the third terminal.
Optionally, the first terminal is connected to the third terminal and disconnected from the second terminal.
Optionally, the optical detection unit is a light sensing detection lamp.
In addition, this application still provides a detection device, detection device includes foretell photovoltaic tile fault detection circuit.
The application provides a photovoltaic tile fault detection circuit which comprises a photovoltaic module, a voltage comparator, a detection circuit, a selection switch, a fault signal lamp and an optical detection unit; the voltage comparator is connected with the output end of the photovoltaic module and used for detecting a first output voltage of the photovoltaic module; the detection circuit is connected with the voltage comparator, the optical detection unit and the selection switch and is used for controlling the conduction state of the selection switch according to the second output voltage of the voltage comparator; the selection switch is further connected with the fault signal lamp and the output end of the photovoltaic module, and the fault signal lamp is connected with the input end of the photovoltaic module. The voltage of the output end of the photovoltaic module is collected through the voltage comparator, whether the detection circuit is normally controlled to switch on the selector switch according to the collected voltage, and then the fault signal lamp is lightened to judge the faulted photovoltaic module, so that the problem that the photovoltaic tile can be subjected to fault detection after the fault occurs in the prior art is avoided, the phenomenon that a detection device is additionally arranged is needed, each photovoltaic module is subjected to real-time detection through the photovoltaic tile fault detection circuit, and whether the fault occurs is judged according to the fault signal lamp, and therefore the detection efficiency of the photovoltaic tile fault detection can be improved.
Drawings
Fig. 1 is a schematic structural diagram of the photovoltaic tile fault detection circuit of the present invention;
fig. 2 is an internal schematic diagram of a voltage comparator in the photovoltaic tile fault detection circuit of the present invention;
fig. 3 is a circuit diagram of a detection circuit in the photovoltaic tile fault detection circuit of the present invention;
figure 4 is the utility model discloses select switch's inside schematic diagram among photovoltaic tile fault detection circuit.
The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name (R) |
| 10 | |
20 | |
| 30 | |
40 | |
| 50 | |
60 | Fault signal lamp |
| U1 | First comparison chip | R1 | A first resistor |
| R2 | A second resistor | R3 | Third resistance |
| R4 | Fourth resistor | T1 | A first NPN triode |
| DT | Conducting terminal | 21 | A |
| 22 | Second input terminal | 23 | A |
| 51 | First terminal | 52 | A |
| 53 | Third terminal | KX | Control terminal |
The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
Furthermore, descriptions in this application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
The utility model provides a photovoltaic tile fault detection circuit, refer to the structural schematic diagram of the photovoltaic tile fault detection circuit of fig. 1, the photovoltaic tile fault detection circuit includes photovoltaic module 10, voltage comparator 20, detection circuitry 30, selector switch 50, trouble signal lamp 60 and optical detection unit 40;
the voltage comparator 20 is connected to an output end of the photovoltaic module 10, and is configured to detect a first output voltage of the photovoltaic module 10;
the detection circuit 30 is connected to the voltage comparator 20, the optical detection unit 40 and the selection switch 50, and is configured to control a conducting state of the selection switch 50 according to a second output voltage of the voltage comparator 20;
the selection switch 50 is further connected to the fault signal lamp 60 and the output of the photovoltaic module 10, and the fault signal lamp 60 is connected to the input of the photovoltaic module 10.
In this embodiment, the voltage comparator 20 detects a first output voltage at the output end of the photovoltaic module 10 to obtain a detection result (herein, referred to as a level), and the detection circuit 30 controls the selection switch 50 to conduct in different manners according to the detection result, where the first output voltage refers to an actual conversion voltage of the photovoltaic module 10, and the detection result refers to whether the first output voltage meets an actual voltage range, for example, if the first output voltage meets the actual voltage range, a high level is taken as the detection result, otherwise, if the first output voltage does not meet the actual voltage range, a low level is taken as the detection result, where the photovoltaic module refers to a single photovoltaic device composed of a plurality of photovoltaic modules, and the photovoltaic module is composed of a plurality of photovoltaic modules, and a fault detection circuit can be established for each module. According to the connection relationship between the selection switch 50 and the fault signal lamp 60, when one photovoltaic module 10 of the photovoltaic tiles breaks down, the photovoltaic module can be broken down to light the connected fault signal lamp 60, and according to the series connection characteristic of the photovoltaic tiles, the current of other photovoltaic modules passing through the photovoltaic module 10 with the fault can be the fault signal lamp 60 in the fault detection circuit to light, so that the fault detection efficiency is improved.
Further, in another embodiment of the photovoltaic tile fault detection circuit of the present application, referring to fig. 2, fig. 2 is an internal schematic diagram of a voltage comparator in the photovoltaic tile fault detection circuit, where the voltage comparator 20 includes a first input terminal 21, a second input terminal 22, and a first output terminal 23, the first input terminal 21 is connected to the output terminal of the photovoltaic module 10, the second input terminal 22 is connected to a custom comparison voltage source, and the first output terminal 23 is connected to the detection circuit 30.
Specifically, the voltage comparator 20 further includes a first comparison chip U1 and a first resistor R1, pin 3 of the first comparison chip U1 is connected to the first input terminal 21, pin 2 of the first comparison chip U1 is connected to the second input terminal 22, pin 1 of the first comparison chip U1 is connected to the first output terminal 23 and one end of the first resistor R1, which is far away from pin 1 of the first comparison chip U1, is connected to pin 8 of the first comparison chip U1 and the system power supply, and pin 4 of the first comparison chip U1 is connected to the system power supply ground.
Specifically, the first comparison chip U1 is an LM399 chip.
In the present embodiment, the voltage comparator 20 formed by the first comparing chip U1 detects the first output voltage at the output terminal of the photovoltaic module 10, and the first comparing chip U1 may be an LM399 chip or another chip. The main action principle is that a first output voltage of the output end of the photovoltaic module 10 is connected to the first input end 21 of the first comparison chip U1, a customized comparison voltage source is connected to the second input end 22 of the first comparison chip U1, and the level value of the first output end 23 of the first comparison chip U1 can be determined according to the magnitude relation between the first output voltage and the customized comparison voltage source. Therefore, when the first output voltage is greater than or equal to the custom comparison voltage source, the output level value of the first output terminal 23 of the first comparison chip U1 is a high level; when the first output voltage is lower than the self-defined comparison voltage source, the output level value of the first output end 23 of the first comparison chip U1 is a low level, and finally, the output level value of the first output end 23 of the first comparison chip U1 is output to the detection circuit as a detection result, and the selection switch is controlled by the detection circuit. For example, when the output voltage of the photovoltaic module is smaller than a, which is obtained through experiments, it indicates that the photovoltaic module has a fault, so that the custom comparison voltage source is set as a, when the first output voltage of the output end of the actual photovoltaic module 10 is B, the magnitude relation between a and B is detected, an accurate detection result is obtained according to the magnitude relation between the a and B, and when a is smaller than or equal to B, it is known that the photovoltaic module normally works and does not have a fault, a fixed detection result is obtained to conduct and select the selector switch 50; when A > B, the photovoltaic module is known to have a fault, and a fixed detection result is obtained to conduct selection on the selection switch 50. And the photovoltaic module can be subjected to accurate fault judgment.
Further, in another embodiment of the photovoltaic tile fault detection circuit according to the present application, referring to fig. 3, fig. 3 is a circuit diagram of a detection circuit in the photovoltaic tile fault detection circuit, wherein the detection circuit 30 includes a second resistor R2, a first NPN transistor T1, a third resistor R3, and a fourth resistor R4, one end of the second resistor R2 is connected to the optical detection unit 40 as a conduction terminal DT, one end of the second resistor R2 away from the optical detection unit 40 is connected to a collector of the first NPN transistor T1 and the first output terminal 23 of the voltage comparator 20, an emitter of the first NPN transistor T1 is connected to the system power ground, one end of the first NPN transistor T1 connected to the third resistor R3 and one end of the fourth resistor R4 are connected, one end of the third resistor R3 away from the base of the first NPN transistor T1 is connected to the system power ground, and one end of the fourth resistor R4 away from the base of the first NPN transistor T1 is connected to the selection switch 50.
Specifically, the optical detection unit 40 is a light sensing detection lamp.
In the present embodiment, the detection circuit 30 receives the output detection result of the voltage comparator 20 to further control the selection switch 50, as can be seen from fig. 3, when the output level value of the first output end 23 of the first comparison chip U1 is a low level, the first NPN transistor T1 in the detection circuit 30 is not turned on, and the control terminal KX of the selection switch 50 is directly connected to the optical detection unit 40 through the second resistor R2, so that the level of the control terminal KX of the selection switch 50 is the same as the level of the optical detection unit 40; when the output level value of the first output terminal 23 of the first comparison chip U1 is a high level, the first NPN transistor T1 in the detection circuit 30 is turned on, so that the control terminal KX of the selection switch 50 is directly connected to the system power ground through the first NPN transistor T1, so that the control terminal KX of the selection switch 50 is a low level, and further, the selective turn-on of the selection switch 50 can be controlled through the level. It should be noted that the optical detection unit 60 is a light sensing detection lamp, wherein the light sensing lamp controls the detection circuit 30 by sensing actual light, for example, when the light sensing lamp detects that the current time is night, the detection circuit 30 is not powered, so that the actual fault detection error is reduced; when the light-induced lamp detects that the current time is daytime, the detection circuit 30 is powered, the provided level is high, and when the output level value of the first output end 23 of the first comparison chip U1 is low, the level of the control terminal KX of the selection switch 50 is the same as the level of the optical detection unit 40, namely, the high level, so that different control of the detection circuit 30 on the selection switch 50 is realized, and the accuracy of fault detection is ensured.
Further, in another embodiment of the photovoltaic tile fault detection circuit of the present application, referring to fig. 4, fig. 4 is an internal schematic diagram of a selection switch in the photovoltaic tile fault detection circuit, where the selection switch 50 includes a first terminal 51, a second terminal 52, a third terminal 53 and a control terminal KX, the control terminal KX is connected to the detection circuit 30, the first terminal 51 is connected to an output terminal of the photovoltaic module 10, the second terminal 52 is connected to the fault signal lamp 60, and the third terminal 53 is floating.
Specifically, the first terminal 51 is connected to the second terminal 52, and disconnected from the third terminal 53.
Specifically, the first terminal 51 is connected to the third terminal 53 and disconnected from the second terminal 52.
In this embodiment, the selection switch 50 is a dual selection switch, and can selectively turn on different switches according to different control information of the control terminal KX. Wherein the first terminal 51 is a common terminal, the second terminal 52 and the third terminal 53 are selection terminals, and the first terminal 51 and the second terminal 52 or the third terminal 53 can be conducted according to the requirement of the control terminal KX. In the application, when the control terminal KX receives a high level, actually, the circuit is normally controlled to connect the first terminal 51 with the third terminal 53 through the control terminal KX, disconnect the first terminal from the second terminal 52, suspend the third terminal 53, and disconnect the fault signal lamp 60, and the fault signal lamp 60 is not turned on to indicate that the photovoltaic module is normal; when the control terminal KX receives a low level, which actually indicates that the photovoltaic module is not normal, the first terminal 51 is controlled to be connected with the second terminal 52 and disconnected with the third terminal 53 through the control terminal KX, the second terminal 52 is connected with the fault signal lamp 60, so that the fault signal lamp 60 is turned on and lighted, and the lighting of the fault signal lamp 60 indicates that the photovoltaic module has a fault. The user can observe the fault signal lamp 60 of the corresponding photovoltaic module timely and accurately according to the detection result of the photovoltaic tile fault detection circuit, so that the fault of the corresponding photovoltaic module can be maintained timely.
In addition, this application still provides a detection device, detection device includes photovoltaic tile fault detection circuit.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the technical solutions that can be directly or indirectly applied to other related fields without departing from the spirit of the present application are intended to be included in the scope of the present application.
Claims (10)
1. The photovoltaic tile fault detection circuit is characterized by comprising a photovoltaic module, a voltage comparator, a detection circuit, a selection switch, a fault signal lamp and an optical detection unit;
the voltage comparator is connected with the output end of the photovoltaic module and used for detecting a first output voltage of the photovoltaic module;
the detection circuit is connected with the voltage comparator, the optical detection unit and the selection switch and is used for controlling the conduction state of the selection switch according to the second output voltage of the voltage comparator;
the selection switch is further connected with the fault signal lamp and the output end of the photovoltaic module, and the fault signal lamp is connected with the input end of the photovoltaic module.
2. The photovoltaic tile fault detection circuit of claim 1, wherein the voltage comparator comprises a first input terminal, a second input terminal, and a first output terminal, the first input terminal connected to the output terminal of the photovoltaic module, the second input terminal connected to a custom comparison voltage source, the first output terminal connected to the detection circuit.
3. The pv tile fault detection circuit of claim 2, wherein the voltage comparator further comprises a first comparator chip and a first resistor, wherein pin 3 of the first comparator chip is connected to the first input terminal, pin 2 of the first comparator chip is connected to the second input terminal, pin 1 of the first comparator chip is connected to the first output terminal and one end of the first resistor, the other end of the first resistor is connected to pin 8 of the first comparator chip and a system power supply, and pin 4 of the first comparator chip is connected to a system power supply ground.
4. The photovoltaic tile fault detection circuit of claim 3, wherein the first comparison chip is an LM399 chip.
5. The pv tile fault detection circuit of claim 3, wherein the detection circuit comprises a second resistor, a first NPN transistor, a third resistor, and a fourth resistor, one end of the second resistor is connected as a conduction terminal to the optical detection unit, the other end of the second resistor is connected to a collector of the first NPN transistor and a first output terminal of the voltage comparator, an emitter of the first NPN transistor is connected to the system power ground, a base of the first NPN transistor is connected to one end of the third resistor and one end of the fourth resistor, the other end of the third resistor is connected to the system power ground, and the other end of the fourth resistor is connected to the selection switch.
6. The photovoltaic tile fault detection circuit of claim 5, wherein the selection switch includes a first terminal, a second terminal, a third terminal, and a control terminal, the control terminal being connected to the detection circuit, the first terminal being connected to the output of the photovoltaic module, the second terminal being connected to the fault signal, the third terminal being floating.
7. The photovoltaic tile fault detection circuit of claim 6, wherein said first terminal is connected to said second terminal and disconnected from said third terminal.
8. The photovoltaic tile fault detection circuit of claim 6, wherein the first terminal is connected to the third terminal and disconnected from the second terminal.
9. The photovoltaic tile fault detection circuit of claim 5, wherein the optical detection unit is a light sensitive detection lamp.
10. A detection device, characterized in that it comprises a photovoltaic tile fault detection circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221550014.7U CN217849381U (en) | 2022-06-20 | 2022-06-20 | Photovoltaic tile fault detection circuit and detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221550014.7U CN217849381U (en) | 2022-06-20 | 2022-06-20 | Photovoltaic tile fault detection circuit and detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217849381U true CN217849381U (en) | 2022-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221550014.7U Active CN217849381U (en) | 2022-06-20 | 2022-06-20 | Photovoltaic tile fault detection circuit and detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217849381U (en) |
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2022
- 2022-06-20 CN CN202221550014.7U patent/CN217849381U/en active Active
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