CN206948263U - A kind of direct current conflux case photovoltaic group string reversal connection and group string intelligent fault detection means - Google Patents
A kind of direct current conflux case photovoltaic group string reversal connection and group string intelligent fault detection means Download PDFInfo
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- CN206948263U CN206948263U CN201720585568.3U CN201720585568U CN206948263U CN 206948263 U CN206948263 U CN 206948263U CN 201720585568 U CN201720585568 U CN 201720585568U CN 206948263 U CN206948263 U CN 206948263U
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- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 230000007257 malfunction Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001662 opsonic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
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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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- Photovoltaic Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a kind of direct current conflux case photovoltaic group string reversal connection and group string intelligent fault detection means.It includes casing, the tank surface is provided with battery supply, status indicator lamp, device switch, LCD display and cable terminal, control circuit is provided with the casing, the control circuit includes and bleeder circuit, photoelectric isolating circuit and single-chip microcomputer, the battery supply connection microcontroller power supply end, each interface of the cable terminal connects the input of single-chip microcomputer by the bleeder circuit of series connection with photoelectric isolating circuit respectively, the triggering end connection device switch of the single-chip microcomputer, the output end connection status indicator lamp and LCD display of the single-chip microcomputer.The utility model detects each photovoltaic group string wiring condition and working condition, circuit structure simply, is easily realized, cost is low, is effectively helped artificial judgment trouble point, is accurately and timely investigated failure using each string photovoltaic group string magnitude of voltage of control circuit collection.
Description
Technical field
The utility model belongs to photovoltaic generation and photovoltaic power station technical field, and in particular to a kind of direct current conflux case
Photovoltaic group string reversal connection and group string intelligent fault detection means, can help the correct of workmen's accurate judgement photovoltaic group string wiring
Property.
Background technology
At present, known photovoltaic DC header box is after the positive pole negative pole of more string photovoltaic group strings is confluxed, to export jointly
Conflux electrical equipment, and direct current conflux case is configured with multichannel photovoltaic group string both positive and negative polarity input interface and all the way output interface, main to rise
The effect confluxed to the output of multichannel photovoltaic group string.
Due to photovoltaic group string in wiring will often to go here and there after photovoltaic group string completes wiring, it is unified by all photovoltaic group strings just
Negative terminal leads to direct current conflux case, for photovoltaic power station system, it will usually accesses substantial amounts of photovoltaic group string to direct current and converges
Case is flowed, generally at the scene during practice of construction because wiring quantity is more, is frequently present of both positive and negative polarity reversal connection and photovoltaic group string
Phenomena such as back panel wiring broken string, members are missed, component damage.
Be difficult to investigate when problem above occurs, it usually needs by by input both positive and negative polarity protection fuse close, in
In direct current conflux case at both positive and negative polarity busbar using universal meter DC voltage shelves by the single string photovoltaic group string both end voltage value of measurement, when
Occur determining that photovoltaic group string is reversal connection when magnitude of voltage is negative, and adjusted, when a certain string photovoltaic group string magnitude of voltage is far below
Other strings, or during close to zero, judge that this string photovoltaic group string has back panel wiring broken string, members are missed, component damages
Phenomenon.Traditional detection method is very time-consuming and because workload is larger and needs manually to remember measurement result in detection
Record, it is understood that there may be the problems such as neglecting in detection process.
Utility model content
The purpose of this utility model is exactly insufficient existing for above-mentioned background technology in order to solve, there is provided a kind of direct current conflux case
Photovoltaic group string reversal connection and group string intelligent fault detection means, the investigation for being capable of more efficiently and accurately go out any of the above problem, ensured
Direct current conflux case input photovoltaic group concatenation line is accurate before system integration and test, and each photovoltaic group string is not present and misses, damages in itself
Problem.
The technical solution adopted in the utility model is：A kind of direct current conflux case photovoltaic group string reversal connection and group string intelligent fault inspection
Device, including casing are surveyed, the tank surface is provided with battery supply, status indicator lamp, device switch, LCD display and row
Line terminals, the casing is interior to be provided with control circuit, and the control circuit includes bleeder circuit, photoelectric isolating circuit and single-chip microcomputer,
The battery supply connection microcontroller power supply end, each interface of the cable terminal pass through the bleeder circuit and light of series connection respectively
Electric isolating circuit connects the input of single-chip microcomputer, the triggering end connection device switch of the single-chip microcomputer, the output of the single-chip microcomputer
Hold connection status indicator lamp and LCD display.
Further, the bleeder circuit includes resistance R1 and resistance R2, and resistance R1 one end connection cable terminal is just
The input of pole, other end connection resistance R2 one end and photoelectric isolating circuit, the resistance R2 other ends connection cable terminal are born
Pole.
Further, the photoelectric isolating circuit includes isolating chip U2, the first amplifier U1 and the second amplifier U3, and described the
One amplifier U1, isolating chip U2 and the second amplifier U3 are sequentially connected in series, the first amplifier U1 inputs connection bleeder circuit output
End, the second amplifier U3 output ends connect single-chip microcomputer input.
Further, the bleeder circuit input is connected with protection circuit, and the protection circuit includes two poles of series connection
Pipe D1 and fuse FU, the diode D1 anodes connect cable terminal, fuse FU one end connection bleeder circuit input.
Further, the status indicator lamp includes being used to show the normal fault-free indicator lamp of photovoltaic group string and for showing
Show the malfunction indicator lamp of photovoltaic group string reversal connection and failure, the single-chip microcomputer output connects fault-free by relay respectively and indicated
Lamp and malfunction indicator lamp.
Further, in addition to for occurring the buzzer of reversal connection and failure progress auditory tone cues, institute in photovoltaic group string
State single-chip microcomputer output and buzzer is connected by relay.
The utility model using control circuit collection it is each string photovoltaic group string magnitude of voltage, detect each photovoltaic group string wiring condition and
Working condition, circuit structure is simple, easily realization, cost is low, and passes through the equipment such as buzzer, status indicator lamp and export failure letter
Number, staff can be made fast and accurately to find the reversal connection phase in direct current conflux case and failure phase, be easy to staff accurate
Investigation failure in time, effectively increases the checkability of staff and the accuracy of inspection.Bleeder circuit is defeated by photovoltaic group string
The DC voltage partial pressure for going out nearly 800V is the voltage class that can identify of 0-5V single-chip microcomputers, photoelectric isolating circuit using photoelectricity every
Off-chip piece isolates forceful electric power and weak electricity system, reduces influence of the forceful electric power to control chip.Each road photovoltaic is shown by LCD display
The actual voltage value of group string, makes judged result not only qualitative but also can quantify.The cable terminal set in detection means, can
Flexible is connected with each direct current conflux case to be checked.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model detection means.
Fig. 2 is that the system of the utility model detection means connects block diagram.
Fig. 3 is the physical circuit figure of the utility model bleeder circuit and photoelectric isolating circuit.
In figure：1- casings；2- battery supplies；3- buzzers；4- fault-free indicator lamps；5- malfunction indicator lamp；6- devices are opened
Close；7-LCD display screens；8- cable terminals；9- bleeder circuits；10- photoelectric isolating circuits；11- single-chip microcomputers；12- relays.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, is easy to be well understood
The utility model, but they do not form to the utility model and limited.
As Figure 1-3, the utility model includes casing 1, the surface of casing 1 be provided with battery supply 2, buzzer 3,
Status indicator lamp, device switch 6, LCD display 7 and cable terminal 8, the casing 1 is interior to be provided with control circuit, the control electricity
Road includes bleeder circuit 9, photoelectric isolating circuit 10 and single-chip microcomputer 11, and the battery supply 2 connects the power end of single-chip microcomputer 11, described
Each interface of cable terminal 8 connects the input of single-chip microcomputer 11 by the bleeder circuit 9 and photoelectric isolating circuit 10 of series connection respectively
End, the triggering end connection device switch 6 of the single-chip microcomputer 11, the output end connection buzzer 3 of the single-chip microcomputer 11, state instruction
Lamp and LCD display 7.
In such scheme, status indicator lamp includes being used to show the normal fault-free indicator lamp 5 of photovoltaic group string and for showing
Show the malfunction indicator lamp 6 of photovoltaic group string reversal connection and failure, the output end of single-chip microcomputer 11 connects buzzing by relay 12 respectively
Device 3, fault-free indicator lamp 4 and malfunction indicator lamp 5.
In such scheme, bleeder circuit 9 includes resistance R1 and resistance R2, and resistance R1 one end connection cable terminal is just
The input of pole, other end connection resistance R2 one end and photoelectric isolating circuit, the resistance R2 other ends connection cable terminal are born
Pole.Bleeder circuit input is connected with protection circuit, and the protection circuit includes the diode D1 and fuse FU of series connection, described
Diode D1 anodes connect cable terminal, and fuse FU one end connects resistance R1 one end of bleeder circuit.To improve the steady of signal
Qualitative, bleeder circuit input, output end set filter capacitor C1 and C2 respectively,
Photoelectric isolating circuit 10 includes isolating chip U2, the first amplifier U1 and the second amplifier U3, the first amplifier U1 and second
Amplifier U3 is isolating chip U2 peripheral circuit, does not change input value, only plays opsonic action, the first amplifier U1, isolated core
Piece U2 and the second amplifier U3 are sequentially connected in series, and the first amplifier U1 inputs connect bleeder circuit output end, second amplifier
U3 output ends connect single-chip microcomputer input.Isolating chip U2 uses the chip of Agilent companies HCNR201 models, the first amplifier
U1 and the second amplifier U3 is also equipped with corresponding resistance and electric capacity.
Control circuit is printed circuit board, and single-chip microcomputer 11 is using the STM32 based on ARM Cortex-M3 kernels as control
Chip, when the photovoltaic DC header box inside group concatenation line detected is all correct and is in normal condition, in LCD display
Each road DC voltage value is shown on 7 and shows that wiring normally indicates, single-chip microcomputer 11 drives fault-free indicator lamp 4 by relay 12
Chang Liang.Get lines crossed inside the photovoltaic DC header box detected exist reversal connection or group string back panel wiring broken string, members miss,
During the failures such as damage, the magnitude of voltage in loop is levels off to zero, or the electricity of other photovoltaic group strings less than the access of same header box
During pressure value, single-chip microcomputer 11 is grown bright and drives buzzer 3 to alarm using the driving malfunction indicator lamp 5 of relay 12, on LCD display 7
In addition to each loop voltage value is shown, it should also show in this direct current conflux case and co-exist in a few road reversal connections, phenomenon of the failure, and show specific
Which road is reversal connection or failure, inspection of construction personnel is quickly checked failure group Series Code number and is corrected in time.Direct current converges
Flow the binding post that each road group string both positive and negative polarity is provided inside case, when carrying out wiring check directly by the cable terminal of detection means with
Direct current conflux case internal terminal is connected using power supply winding displacement, and just whether device for opening switch can detect that photovoltaic group string wiring
Really, each group string working condition is with the presence or absence of abnormal.
Battery supply is the power supply such as single-chip microcomputer 11, status indicator lamp and LCD display, battery is pacified using 3 No. 5 batteries of section
After the completion of dress, device switch is allocated to on-state, intelligent detection device enters working condition.By the winding displacement of intelligent detection device
Terminal 8 is connected with cable terminal on direct current conflux case using power supply winding displacement, and direct current conflux case cable terminal is used to draw each road light
The positive and negative two-stage of volt group string, if direct current conflux case, which is 12 tunnels, enters 1, draw cable terminal and exported for 24 tunnels, in the present embodiment Fig. 2
The direct current conflux case of display is that 16 tunnels enter 1.After completion intelligent apparatus is connected with direct current conflux case, direct current signal leads to Intelligent Measurement
Device, as shown in Figure 2 and Figure 3, each road photovoltaic group string are accessed by anti-reverse diode D1 and 0.5A fuses FU, utilize partial pressure
For circuit 9 by photovoltaic DC power supply partial pressure, forceful electric power and light current both sides are carried out physics by the voltage after partial pressure through photoelectric isolating circuit 10
Isolation, influence of the strong power system to singlechip control chip circuit is reduced, magnitude of voltage is converted into 0-5V moulds after Phototube Coupling
It analog quantity, can be identified by single-chip microcomputer, be inputted through Chip Microcomputer A/D pins, after single-chip microcomputer collection voltages signal, be judged by calculating,
Judge that this string photovoltaic group string is working properly when magnitude of voltage is more than 600V, wiring condition is good, and now fault-free indicator lamp 4 is (green
Color) Chang Liang, each road photovoltaic group string magnitude of voltage is shown on LCD display 7 and shows normal work.Sentence when magnitude of voltage is less than 600V
This string photovoltaic group string of breaking there may be failure, be returned in showing each road magnitude of voltage on LCD display 7 and there may be the group string of failure
Number on road.Anti-reverse diode is provided with because signal is inputted in Acquisition Circuit, therefore in photovoltaic group string both positive and negative polarity reversal connection, it is single
The magnitude of voltage of piece machine testing is zero.When monolithic machine testing magnitude of voltage is zero, it can be determined that this string photovoltaic group string has reversal connection and showed
As or this road photovoltaic group string in exist broken string or miss phenomenon, now malfunction indicator lamp 5 (red) Chang Liang, buzzer 3 are alarmed,
And in showing each road magnitude of voltage on LCD display 7, and reversal connection or broken string, the photovoltaic group string loop numbering for missing phenomenon be present, it is existing
Field testing staff can be accurately positioned trouble point after finding failure, accurately grasp fault type, exclude photovoltaic group string failure in time
And wiring faults.
The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (6)
1. a kind of direct current conflux case photovoltaic group string reversal connection and group string intelligent fault detection means, it is characterised in that：Including casing
(1), casing (1) surface is provided with battery supply (2), status indicator lamp, device switch (6), LCD display (7) and row
Line terminals (8), the casing is interior to be provided with control circuit, and the control circuit includes bleeder circuit (9), photoelectric isolating circuit (10)
With single-chip microcomputer (11), the battery supply (2) connects single-chip microcomputer (11) power end, each interface point of the cable terminal (8)
The input of single-chip microcomputer (11), the single-chip microcomputer are not connected by the bleeder circuit (9) and photoelectric isolating circuit (10) of series connection
(11) triggering end connection device switch (6), the output end connection status indicator lamp and LCD display of the single-chip microcomputer (11)
(7)。
2. direct current conflux case photovoltaic group string reversal connection according to claim 1 and group string intelligent fault detection means, its feature
It is：The bleeder circuit (9) includes resistance R1 and resistance R2, and resistance R1 one end connection cable terminal corresponding interface is just
The input of pole, other end connection resistance R2 one end and photoelectric isolating circuit (10), the resistance R2 other ends connection winding displacement end
The negative pole of sub- corresponding interface.
3. direct current conflux case photovoltaic group string reversal connection according to claim 1 and group string intelligent fault detection means, its feature
It is：The photoelectric isolating circuit (10) includes isolating chip U2, the first amplifier U1 and the second amplifier U3, first amplifier
U1, isolating chip U2 and the second amplifier U3 are sequentially connected in series, and the first amplifier U1 inputs connect bleeder circuit (9) output end,
The second amplifier U3 output ends connect single-chip microcomputer (11) input.
4. direct current conflux case photovoltaic group string reversal connection according to claim 1 and group string intelligent fault detection means, its feature
It is：Bleeder circuit (9) input is connected with protection circuit, and the protection circuit includes diode D1 and the fusing of series connection
Device FU, the positive pole of the diode D1 anodes connection cable terminal corresponding interface.
5. direct current conflux case photovoltaic group string reversal connection according to claim 1 and group string intelligent fault detection means, its feature
It is：The status indicator lamp includes being used to show the normal fault-free indicator lamp (4) of photovoltaic group string and for showing photovoltaic group
String reversal connection and the malfunction indicator lamp (5) of failure, single-chip microcomputer (11) output end pass through relay (12) and connect fault-free respectively
Indicator lamp (4) and malfunction indicator lamp (5).
6. direct current conflux case photovoltaic group string reversal connection according to claim 1 and group string intelligent fault detection means, its feature
It is：Also include being used to reversal connection occur in photovoltaic group string and failure carries out the buzzer (3) of auditory tone cues, the single-chip microcomputer (11)
Output end connects buzzer (3) by relay.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720585568.3U CN206948263U (en) | 2017-05-24 | 2017-05-24 | A kind of direct current conflux case photovoltaic group string reversal connection and group string intelligent fault detection means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720585568.3U CN206948263U (en) | 2017-05-24 | 2017-05-24 | A kind of direct current conflux case photovoltaic group string reversal connection and group string intelligent fault detection means |
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| CN206948263U true CN206948263U (en) | 2018-01-30 |
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| CN201720585568.3U Active CN206948263U (en) | 2017-05-24 | 2017-05-24 | A kind of direct current conflux case photovoltaic group string reversal connection and group string intelligent fault detection means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211552A (en) * | 2020-03-14 | 2020-05-29 | 宁波锦浪新能源科技股份有限公司 | A PV cell panel reverse connection detection device and detection method |
| US11799419B2 (en) | 2019-05-28 | 2023-10-24 | Huawei Technologies Co., Ltd. | Detection condition determining method, apparatus, and photovoltaic system |
-
2017
- 2017-05-24 CN CN201720585568.3U patent/CN206948263U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11799419B2 (en) | 2019-05-28 | 2023-10-24 | Huawei Technologies Co., Ltd. | Detection condition determining method, apparatus, and photovoltaic system |
| CN111211552A (en) * | 2020-03-14 | 2020-05-29 | 宁波锦浪新能源科技股份有限公司 | A PV cell panel reverse connection detection device and detection method |
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Effective date of registration: 20211230 Address after: 430056, No. 1, Dongfeng central, No. three Dongfeng Road, Wuhan economic and Technological Development Zone, Hubei, Wuhan, A Patentee after: Wuhan Dongyan intelligent design and Research Institute Co.,Ltd. Address before: 430056 Wuhan City, Hubei Province block a, Donghe center, No. 1, Dongfeng Third Road, Wuhan Economic and Technological Development Zone, Wuhan City, Hubei Province Patentee before: DONGFENG DESIGN INSTITUTE Co.,Ltd. |