CN214154453U - Photovoltaic board fault detection circuit and instrument - Google Patents
Photovoltaic board fault detection circuit and instrument Download PDFInfo
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- CN214154453U CN214154453U CN202023142458.0U CN202023142458U CN214154453U CN 214154453 U CN214154453 U CN 214154453U CN 202023142458 U CN202023142458 U CN 202023142458U CN 214154453 U CN214154453 U CN 214154453U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses a photovoltaic board fault detection circuit and instrument relates to photovoltaic board trouble or flaw and detects, aims at solving people and can't carry out the problem that detects to the trouble or the flaw of photovoltaic board under the illumination condition to individuality photovoltaic board, and its technical scheme main points are: the photovoltaic module comprises a resistance module and a control module, wherein the resistance module is connected between a positive output end and a negative output end of a photovoltaic panel by a resistance value matched with the number of the measured photovoltaic panels to form an external connection channel; the current detection module is connected in series in the external access to acquire and display the current magnitude of the external access; and the voltage detection module is connected with the resistance module in parallel and used for acquiring and displaying the voltage of the resistance module. The utility model discloses a resistance module provides the resistance with photovoltaic board quantity matching, and voltage detection module and current detection module measure, contrast through carrying out the measured data to adjacent photovoltaic board, realize the detection, the judgement to trouble and bad photovoltaic board, and the quick judgement of people of being convenient for improves the work efficiency who detects.
Description
Technical Field
The utility model relates to a photovoltaic board fault detection, more specifically say, it relates to a photovoltaic board fault detection circuit and instrument.
Background
Photovoltaic power generation is a technology of directly converting light energy into electric energy by using the photovoltaic effect of a semiconductor interface. The photovoltaic module mainly comprises a photovoltaic panel assembly, a controller and an inverter, and the main components comprise electronic components. The photovoltaic panels are packaged and protected after being connected in series to form a large-area photovoltaic panel assembly, and then the photovoltaic panel assembly is matched with components such as a power controller to form a photovoltaic power generation device.
At present, no instrument for specially detecting the photovoltaic panel exists in the market, so that people cannot detect the faults of the solar photovoltaic module, and therefore a photovoltaic panel fault detection device needs to be researched and developed.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model discloses a first aim at provides a photovoltaic board fault detection circuit and instrument, provides the resistance that matches with photovoltaic board quantity through resistance module, and voltage detection module and current detection module measure, contrast through carrying out measured data to adjacent photovoltaic board, realize to the detection of trouble and bad photovoltaic board, judge, the quick judgement of the people of being convenient for improves the work efficiency who detects.
The above technical purpose of the present invention can be achieved by the following technical solutions: a photovoltaic panel fault detection circuit comprises
The resistance module is connected between the positive output end and the negative output end of the photovoltaic panel by a resistance value matched with the number of the measured photovoltaic panels to form an external connection path;
the current detection module is connected in series in the external access to acquire and display the current magnitude of the external access;
and the voltage detection module is connected with the resistance module in parallel and used for acquiring and displaying the voltage of the resistance module.
By adopting the technical scheme, the resistance value matched with the number of the measured photovoltaic panels is provided by the resistance module, when the resistance module is connected with two ends of the photovoltaic panels to form an external connection path, the constant current in the external connection path is kept, the current detection module is connected in the external connection path in series and can detect and display the current passing through the resistance module, and the voltage at two ends of the resistance module is measured and displayed by the voltage detection module connected in parallel with the resistance module, so that people can detect two groups of photovoltaic panel groups under the same illumination condition, the voltage at two ends of the resistance module and the current at the moment are measured, the faults of the photovoltaic panel groups are judged by comparing two adjacent groups of measured data, and the faults or bad photovoltaic panels are conveniently and rapidly judged by comparing the data, the problem that people can not detect faults or flaws of individual photovoltaic panels under the illumination condition is solved.
The utility model discloses further set up to: the resistance module comprises a plurality of fixed resistors, one ends of the fixed resistors are connected with each other to form a public end connected with the photovoltaic panel, and a connecting point at the other end of each fixed resistor is connected with a switching circuit used for switching the fixed resistors with different resistance values.
Through adopting above-mentioned technical scheme, form the common port of being connected with the photovoltaic board through the one end interconnect with a plurality of fixed resistors, and be connected through the tie point of switching circuit with the fixed resistor other end to the realization is applicable to the detection of different quantity photovoltaic boards to the resistance fast switch-over of resistance module, improves voltage measurement's precision.
The utility model discloses further set up to: the switching circuit comprises a knob switch, the fixed end of the knob switch is connected with the current detection module in series and then connected to the photovoltaic panel, and the movable end of the knob switch is different from the connecting points of the fixed resistors.
Through adopting above-mentioned technical scheme, knob switch's stiff end and current detection module establish ties and be connected with the photovoltaic board, and its expansion end switches between the tie point of fixed resistance, and then when selecting the fixed resistance of different resistances, the homoenergetic detects the electric current size of flowing through fixed resistance through the current detection module, improves current measurement's precision.
The utility model discloses further set up to: one end of the voltage detection module is connected to the public end of the fixed resistor, and the other end of the voltage detection module is connected to the fixed end of the knob switch.
Through adopting above-mentioned technical scheme, the both ends of voltage detection module are connected with the common port of fixed resistance and knob switch's stiff end respectively to can detect the voltage at fixed resistance both ends, because resistance module connects between the positive output of photovoltaic board and negative output, select the resistance of resistance module through knob switch, be applicable to and detect by the photovoltaic board group that different quantity photovoltaic boards concatenate.
The second aim at provides a photovoltaic board fault detection detector, through pointer, voltage calibrated scale and the adjust knob who is connected with rotary switch, is convenient for select the resistance in the test circuit, when examining the photovoltaic board to different quantity series connection, improves the precision of test and makes things convenient for people to observe the deflection of pointer.
The utility model provides a photovoltaic board fault detection appearance, includes as above technical scheme photovoltaic board fault detection circuit, still includes the casing that supplies photovoltaic board fault detection circuit to place.
Through adopting above-mentioned technical scheme, through setting up casing protection photovoltaic board fault detection circuit, the people of being convenient for use just improves detection circuit's reliability.
The utility model discloses further set up to: be equipped with the pointer on the casing and be used for showing the voltage scale of voltage detection module detection voltage size, the casing is equipped with and corresponds with the scale of voltage scale for the indicateing mark of the photovoltaic board quantity that detects, be equipped with the adjusting part who is used for driving rotary switch to select different resistance fixed resistance on the casing.
Through adopting above-mentioned technical scheme, through setting up pointer and voltage calibrated scale, can show the voltage magnitude that voltage detection module detected, nevertheless when measuring the adjacent photovoltaic board of multiunit through the instrument, be convenient for to the scale of instructing through the pointer and the range difference of deflecting, whether have the photovoltaic board of flaw or trouble in the photovoltaic board of quick judgement detection.
The utility model discloses further set up to: the adjusting component comprises an adjusting knob used for toggling a knob switch, the adjusting knob is rotatably connected to the shell, and adjusting gears which are distributed on the periphery of the adjusting knob in an annular array mode and used for indicating the number of the measured photovoltaic panels are arranged on the shell.
Through adopting above-mentioned technical scheme, through rotating the adjust knob of connection on the casing, can drive knob switch and switch between a plurality of fixed resistance's tie point, and through the regulation shelves that ring array distributes outside adjust knob on the casing, the people of being convenient for select with the fixed resistance of photovoltaic board quantity adaptation.
The utility model discloses further set up to: the casing undercut is formed with the arc wall that is located the indicator below, adjusting part includes sliding connection in the arc wall for toggle knob switch's regulation plectrum.
Through adopting above-mentioned technical scheme, through the regulation plectrum drive knob switch of slip in the arc wall, the people of being convenient for select the shelves to the quantity of measuring the photovoltaic board, and the arc wall is located the below of indicateing arm to be convenient for observe the range that the gear of selecting and pointer deflected, thereby be convenient for adjust the photovoltaic board quantity that the gear corresponds with the adaptation test.
To sum up, the utility model discloses following beneficial effect has:
the resistance value matched with the number of the photovoltaic panels is provided through the resistance module, an external connection path is formed with the photovoltaic panels, the constancy of the current of the external connection circuit is kept, the current detection module is connected in the external connection path in series, the current size provided by the corresponding photovoltaic panels can be obtained and displayed, the voltage detection module connected with the resistance module in parallel can be used for obtaining and displaying the voltage sizes at two ends of the resistance module, the photovoltaic panels adjacent to a plurality of groups are detected, the measured data are compared, if the voltage and the current are obviously different, people can rapidly judge faults or bad photovoltaic panels through data comparison.
Drawings
FIG. 1 is a schematic diagram of a photovoltaic panel detection circuit;
FIG. 2 is a circuit schematic of a photovoltaic panel detection circuit;
FIG. 3 is a schematic structural diagram of a second embodiment;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a schematic structural diagram of a third embodiment;
fig. 6 is an enlarged schematic view of a portion B of fig. 5.
In the figure: 1. a housing; 2. a voltage dial; 3. an indicator mark; 4. adjusting a knob; 5. adjusting gears; 6. An arc-shaped slot; 7. adjusting the shifting piece; 8. a pointer.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Example 1
A photovoltaic panel fault detection circuit, referring to FIG. 1, includes a resistance module, a current detection module connected in series with the resistance module, and a voltage detection module connected in parallel with the resistance module.
Referring to fig. 1 and 2, the resistor module is connected between the positive output end and the negative output end of the photovoltaic panel to form an external connection path for providing a resistance value matched with the number of the measured photovoltaic panels, where the matching with the number of the photovoltaic panels means that the resistance value of the resistor module is increased by the same multiple when the number of the measured photovoltaic panels is increased by multiple, specifically in this embodiment, the resistor module is composed of a fixed resistor R1, a fixed resistor R2, a fixed resistor R3, and a fixed resistor R4, where connection points of one ends of the fixed resistor R1, the fixed resistor R2, the fixed resistor R3, and the fixed resistor R4 are welded to each other to form a common end connected with the photovoltaic panel, and connection points of the other ends of the fixed resistor R1, the fixed resistor R2, the fixed resistor R3, and the fixed resistor R4 are connected with the photovoltaic panel through a switching circuit.
Wherein switching circuit is used for switching the fixed resistance and the photovoltaic board of different resistances and is connected to the photovoltaic board quantity that the adaptation was surveyed selects four ways rotary switch as rotary switch in the switching circuit in this embodiment, and rotary switch's stiff end and photovoltaic board welding, and its expansion end switches between the tie point of fixed resistance.
For example, when a photovoltaic panel with the rated voltage of 18 volts is detected, the fixed resistor connected with the movable end of the rotary switch is switched through the rotary switch, the fixed resistor R1 with the resistance value of 5 ohms is selected, and if a photovoltaic panel assembly formed by connecting two photovoltaic panels in series with the rated voltage of 18 volts is detected, the fixed resistor R2 with the resistance value of 10 ohms is connected through the rotary switch, so that the resistor module provides the resistance value matched with the number of the measured photovoltaic panels.
Referring to fig. 1 and 2, the current detection module measures and displays the magnitude of current passing through the fixed resistor when in use, and is connected in series between the fixed end of the rotary switch and the photovoltaic panel.
Referring to fig. 1 and 2, the voltage detection module measures and displays the voltage at two ends of the fixed resistor when in use, one end of the voltage detection module is welded with the common end of the fixed resistor, and the other end of the voltage detection module is welded with the fixed end of the knob switch.
Certainly, the power detection module and the voltage detection module are more on the market, the principle of the power detection module and the voltage detection module is the same as that of an ammeter or a voltmeter, and the voltage and the current at two ends of the resistance module are detected.
As a specific detection example, when fault detection is performed on a photovoltaic panel assembly formed by connecting four photovoltaic panels of the same type in series under the same lighting condition, the movable end of a knob switch is connected with a connection point of a fixed resistor R2, then one end of a current detection module, which is far away from the knob switch, is connected with one end of the photovoltaic panel assembly, then the common end of the fixed resistor R1, the fixed resistor R2, the fixed resistor R3 and the fixed resistor R4 is connected to the middle of the photovoltaic panel assembly, so that two adjacent photovoltaic panels in the photovoltaic panel assembly and the fixed resistor R2 form a path, then the voltage and the current displayed by the voltage detection module and the current detection module are respectively read, then the detection is repeated for the other two adjacent photovoltaic panels, through comparison of two groups of detection data, when an open circuit occurs inside the faulty photovoltaic panel, the open circuit exists in the path formed by the photovoltaic panel and the fixed resistor R2, at this moment, the display reading of the digital ammeter is zero, or when the internal resistance of the bad photovoltaic panel is abnormally increased, the bad photovoltaic panel can divide the voltage at two ends of the fixed resistor R2 in the external connection path, so that the voltage measured by the photovoltaic panel assembly with the fault or the bad photovoltaic panel is obviously smaller than the value measured by the connected photovoltaic panel assemblies, and people can quickly judge the photovoltaic panel with the fault or the flaw.
Example 2
The utility model provides a photovoltaic board fault detection appearance, including the circuit board of a photovoltaic board fault detection circuit in embodiment one, refer to fig. 3 and fig. 4, including setting up the casing 1 that the circuit board is used for the fixed line board outward, be equipped with on the casing 1 and be curved voltage dial 2, be formed with the scale that corresponds with the voltage value on the voltage dial 2, and rotate on the casing 1 and be connected with pointer 8 that directional voltage dial 2 is used for showing resistance module both ends voltage size, and be provided with the indicateing arm 3 that is used for instructing measured photovoltaic board quantity on the casing 1, and indicateing arm 3 sets up with the scale of voltage dial 2 is concentric, and install the electronic display screen who is connected with current detection module on the casing 1, be used for showing the electric current size of passing through resistance module.
Referring to fig. 3, an adjusting knob 4 is rotatably connected to the housing 1, an adjusting gear 5 surrounding the adjusting knob 4 is formed on the housing 1 by pasting or injection molding, and the number of the adjusting gear 5 corresponds to the number of the photovoltaic panels to be detected, wherein the gears of the adjusting gear 5 include an off gear and 1 to 4 gears, in this embodiment, the adjusting knob 4 is a five-gear rotary position switch, wherein four gears are respectively connected to the fixed resistor by soldering tin, and a connecting point at the center of the adjusting knob 4 is welded to the fixed end of the knob switch.
Under same illumination condition, when detecting the photovoltaic board subassembly that is become by polylith photovoltaic board series connection, through rotating adjust knob 4, realize fixed resistance's fast switch-over in the external access, and lie in adjust knob 4 outlying regulation shelves 5 on through casing 1, can be quick select suitable gear according to the quantity that detects the photovoltaic board, the realization to measuring the voltage size is realized through the deflection of the pointer 8 of rotating the connection on casing 1, when detecting the contrast to adjacent two sets of photovoltaic board subassemblies with quantity and with the model, can be through the obvious comparison to gained voltage size of the deflection amplitude of pointer 8, measure and contrast through the multiunit, be convenient for people short-term test or differentiate the photovoltaic board that has trouble or bad in the photovoltaic board subassembly.
Example 3
A photovoltaic board fault detector, as shown in fig. 5 and 6, differs from the second embodiment in that: sunken arc 6 just is located indicator 3 below on casing 1, one side of arc 6 bonds have the sheetmetal with rotary switch stiff end electric connection, and the connecting point array distribution of a plurality of fixed resistance is at the opposite side of arc 6, wherein the adjusting part is sliding connection's regulation plectrum 7 in arc 6, adjust plectrum 7 and rotary switch's expansion end and be connected, and its both ends are installed the contact of distribution and sheetmetal and fixed resistance contact, and switch on each other between two contacts, thereby realize that rotary switch's expansion end switches between a plurality of fixed resistance's tie point.
When the fault detection is carried out on the photovoltaic panel assembly which is formed by connecting two adjacent groups of photovoltaic panels which are positioned in the same illumination condition and are formed by connecting four photovoltaic panels of the same type in series, the adjusting shifting sheet 7 positioned in the arc-shaped groove 6 slides along the arc-shaped groove 6, because one end of the adjusting poking sheet 7 is always connected with the metal sheet and the connecting point of the fixed end of the knob switch and the fixed resistor is formed by the mutually conducted contacts, by displacing the adjusting poke sheet 7 to point to the indicator 3 with the number 4, the fixed resistor R4 is connected with the photovoltaic panel assembly to form a passage, the voltage level indicated by the pointer 8 pointing to the voltage dial 2, and the current level indicated on the meter are then read by the pointer 8, by comparing the data of the two adjacent sets, therefore, the faults of the photovoltaic panel assembly are judged, and people can conveniently and quickly judge the faults or poor photovoltaic panels through data comparison and the deflection amplitude of the pointer 8.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A photovoltaic panel fault detection circuit, characterized by: comprises that
The resistance module is connected between the positive output end and the negative output end of the photovoltaic panel by a resistance value matched with the number of the measured photovoltaic panels to form an external connection path;
the current detection module is connected in series in the external access to acquire and display the current magnitude of the external access;
and the voltage detection module is connected with the resistance module in parallel and used for acquiring and displaying the voltage of the resistance module.
2. The photovoltaic panel fault detection circuit of claim 1, wherein: the resistance module comprises a plurality of fixed resistors, one ends of the fixed resistors are connected with each other to form a public end connected with the photovoltaic panel, and a connecting point at the other end of each fixed resistor is connected with a switching circuit used for switching the fixed resistors with different resistance values.
3. The photovoltaic panel fault detection circuit of claim 2, wherein: the switching circuit comprises a knob switch, the fixed end of the knob switch is connected with the current detection module in series and then connected to the photovoltaic panel, and the movable end of the knob switch is different from the connecting points of the fixed resistors.
4. A photovoltaic panel fault detection circuit according to claim 3, characterized in that: one end of the voltage detection module is connected to the public end of the fixed resistor, and the other end of the voltage detection module is connected to the fixed end of the knob switch.
5. The utility model provides a photovoltaic board fault detector which characterized in that: comprising a photovoltaic panel failure detection circuit according to any of claims 1 to 4, further comprising a housing (1) for placing the photovoltaic panel failure detection circuit.
6. The photovoltaic panel fault detector of claim 5, wherein: be equipped with pointer (8) on casing (1) and be used for showing voltage detection module voltage detection size's voltage calibrated scale (2), casing (1) is equipped with and corresponds with the scale of voltage calibrated scale (2) for the indicateing indicator (3) of the photovoltaic board quantity that the signal detects, be equipped with the adjusting part who is used for driving knob switch to select different resistance fixed resistance on casing (1).
7. The photovoltaic panel fault detector of claim 6, wherein: the adjusting component comprises an adjusting knob (4) used for toggling a knob switch, the adjusting knob (4) is rotatably connected to the shell (1), and adjusting gears (5) which are distributed on the periphery of the adjusting knob (4) in an annular array mode and used for indicating the number of the measured photovoltaic panels are arranged on the shell (1).
8. The photovoltaic panel fault detector of claim 6, wherein: casing (1) undercut is formed with arc wall (6) that are located indicator (3) below, adjusting part includes sliding connection in arc wall (6) for toggle knob switch's regulation plectrum (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023142458.0U CN214154453U (en) | 2020-12-24 | 2020-12-24 | Photovoltaic board fault detection circuit and instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023142458.0U CN214154453U (en) | 2020-12-24 | 2020-12-24 | Photovoltaic board fault detection circuit and instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214154453U true CN214154453U (en) | 2021-09-07 |
Family
ID=77529423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023142458.0U Active CN214154453U (en) | 2020-12-24 | 2020-12-24 | Photovoltaic board fault detection circuit and instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214154453U (en) |
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2020
- 2020-12-24 CN CN202023142458.0U patent/CN214154453U/en active Active
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