CN107370455A - A kind of automatic monitoring of photovoltaic cell system and troubleshooting methodology - Google Patents
A kind of automatic monitoring of photovoltaic cell system and troubleshooting methodology Download PDFInfo
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- CN107370455A CN107370455A CN201710622717.3A CN201710622717A CN107370455A CN 107370455 A CN107370455 A CN 107370455A CN 201710622717 A CN201710622717 A CN 201710622717A CN 107370455 A CN107370455 A CN 107370455A
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- switch
- battery pack
- gate
- generating system
- photovoltaic
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000012544 monitoring process Methods 0.000 title description 2
- 238000013024 troubleshooting Methods 0.000 title description 2
- 238000003491 array Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims description 24
- 230000006378 damage Effects 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
-
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of method that conveniently can be detected cell piece working condition and carry out the photovoltaic generating system automatic detection and failture evacuation of ball bearing made conversion, it in photovoltaic cell chip arrays by setting peripheral circuit, by relative program can automatic detection have in array the cell piece of short circuit or failure and replace its automatic short circuit, make photovoltaic generating system avoid in photovoltaic cell chip arrays because the damage of some cell piece and caused by situation about can not use, photovoltaic generating system is still remained on before maintenance is concentrated next time.
Description
Technical field
The present invention relates to a kind of design of photovoltaic electrification component and automatic detection and the method for failture evacuation, in particular to
To a kind of method that conveniently can be detected cell piece working condition and carry out ball bearing made conversion.
Background technology
At present, independent type photovoltaic power generation system has been obtained for a certain degree of application and with wide in the vast rural areas
Wealthy development prospect.But during actual use, often occur when system generating failure, it is professional due to user
Limitation and rural area technical support personnel often can not arrive at scene in the very first time, cause photovoltaic generating system can not work
Make and idle situation.However, in physical fault investigation, the system failure is often made by a piece of or several photovoltaic cell damages
Into.For example, the array being used in series, wherein the damage of a piece of cell piece or associated welds reason etc. cause open circuit, then it is whole
Individual series-connected cell array can not be used due to system open circuit, or wherein a piece of cell piece is drawn because self reason internal resistance is excessive
Low output voltage always can not charge to battery.If damage cell piece is replaced with into wire automatically, under normal circumstances
Though output voltage slightly reduces compared with normal voltage value but still can meet the charging requirement of battery, make photovoltaic generating system next
Secondary concentrate can still continue to run with before maintenance.
The content of the invention
It is an object of the invention to provide a kind of design of new photovoltaic cell system and automatic detection and failture evacuation
Method, it is detected using information acquisition module to the cell piece in photovoltaic power generation array, if found the abnormal situation, utilizes letter
Single control circuit automatically can replace the cell piece of damage, ensure the normal operation of photovoltaic system, significantly reduce photovoltaic skill
The repair rate of art attendant, promote the application of photovoltaic power generation technology.
The present invention can be achieved through the following technical solutions：
A kind of method of photovoltaic generating system automatic detection and failture evacuation, it is characterised in that specifically include following steps：
1）For photovoltaic generating system, one central control system is set；
2）Each concatenation one can on the positive and negative electrode lead of each battery pack in the photovoltaic cell chip arrays of photovoltaic generating system
Control switch；Gate-controlled switch and sampling resistor short circuit by the positive and negative electrode of each battery pack by a series connection, by the sampling
The gate-controlled switch of resistor coupled in parallel one；The sampling resistor is connected to the information acquisition module of central control system, it is described controllable to open
Close the switch control module for being connected to central control system；
3）The gate-controlled switch concatenated on the positive and negative electrode lead of each battery pack is normally closed, and remaining gate-controlled switch is normally opened, utilizes program
The output total voltage of photovoltaic generating system is detected by the information acquisition module of central control system；
4）If it is defeated less than total voltage preset value in program, the switch control module output pin of central control system to export total voltage
Go out switch controlling signal and open the gate-controlled switch that concatenates on first battery anode lead, close first battery pack just,
Gate-controlled switch in series with a resistor makes the short circuit current of first battery pack flow through sampling resistor between negative pole；
5）The short circuit current or resistive voltage of sampling resistor are detected by the information acquisition module of central control system with program, if
High compared with short circuit current or resistive voltage is preset in program, then that recovers to concatenate on first battery pack positive and negative electrode lead controllable opens
Close state normally closed, that other two gate-controlled switch is normally opened；If compared with short circuit current is preset in program or resistive voltage is small, the is closed
The gate-controlled switch and gate-controlled switch in parallel with a resistor concatenated on one battery anode lead, open first battery electrode
The gate-controlled switch concatenated on lead, by first battery pack short circuit；
6）Second battery pack, repeat step 4 are chosen using programme-control）With 5）；The like a to the last battery pack
Repeat step 4）With 5）Finish.
Further, the present invention can utilize following technical scheme to realize：
The information acquisition module and switch control module of the central control system connect respectively through switch selection circuit module
To sampling resistor and each switch.
Each battery pack in the photovoltaic cell chip arrays can be cell piece, or cell piece
Parallel-connection structure；Battery pack described in the photovoltaic cell chip arrays is in series.
The sampling resistor can be connected to information acquisition module by way of concatenating a current sensor, can also use straight
Connect the mode that resistance both end voltage is connected to information acquisition module.
The central control system is PC control systems or single-chip microcomputer.
The switch is relay.
The advantages of this programme, is：After photovoltaic battery array is cascaded structure or is first in parallel during cascaded structure, if wherein having
When cell piece damages or respective peripheral contact open circuit causes no output voltage, broken parts can be replaced with wire automatically, if
Photovoltaic battery array broken parts are less, such as at one or at two, then will not significantly affect output voltage, ensure to battery
Charge normal.
Brief description of the drawings
Fig. 1 is the structural representation of photovoltaic battery array of the present invention.
Fig. 2 is photovoltaic cell schematic diagram in parallel.
Fig. 3 be photovoltaic battery array first connect after parallel form structural representation.
Embodiment
The present invention is more fully described hereinafter with reference to accompanying drawing 1-2, in illustrating below, eliminates to technology people in the art
The description of member's known features and technology.As shown in fig. 1, this photovoltaic power generation array is composed in series by multiple photovoltaic cell groups 1, light
Volt battery pack 1 can be cell piece 2, or the parallel-connection structure of monomer photovoltaic cell piece shown in Fig. 22.In each electricity
Switch S1, a S2 is respectively serially connected with the positive and negative electrode lead of pond group 1；The positive and negative electrode of each battery pack 1 by one series connection open
Close S3 and sampling resistor R short circuits；The sampling resistor R parallel connections one switch S4；The sampled signal of the sampling resistor R connects through wire
An information acquisition module is connected to, all switches are connected to switch control module.To avoid making signal graph line in disorder,
Keep schematic diagram it is succinct in order to describe the present invention the course of work, and because all photovoltaic cell groups 1 sampling resistor R and
It is identical with the mode of switch control module that switch through wire is connected to information acquisition module, therefore only depicts light in accompanying drawing 1
The sampling resistor R and switch of a photovoltaic cell group 1 in volt battery chip arrays are connected to information acquisition module through wire and opened
Control module is closed, it has no effect on the introduction to embodiment.
The sampled signal of the resistance R can directly concatenate a current sensor, and the output end of current sensor is connected
To information acquisition module；Or by the way of voltage sample, resistance both sides voltage is connected to information through wire respectively and adopted
Collect module.
Described information acquisition module and switch control module can be a PC control systems, pass through external on-off circuit module pair
It is respectively connecting to after the I/O mouths extension of PC control systems on sampling resistor and each switch；Wherein described external switch selection electricity
Road module can voluntarily determine according to the scale of photovoltaic battery array, such as：Photovoltaic battery array is 8 series connection in the present embodiment
Battery pack 1, each battery pack 1 are 8 cell pieces in parallel, then can be expired from the switch selection circuit module on 64 tunnels
Foot；Described information acquisition module and switch control module can also be SCM systems, pass through external on-off circuit module pair
The I/O mouths of single-chip microcomputer are extended, and using the method for time sharing sampling, different electricity are sampled at times using the input port of single-chip microcomputer
The data of pond group 1 are handled, and then pass through switch selection circuit mould by single-chip microcomputer output mouth output switch control signal
Block carries out the operation of respective switch, is handled without user.
On the basis of above-mentioned design, using sampled signal as resistance R both end voltages, central control system is used as using single-chip microcomputer
Exemplified by, the course of work of the system is introduced with reference to accompanying drawing 1-2：The system switch S1, S2 are in normally off, and S3, S4 are in normal
Open state；Single-chip microcomputer performs pre-set programs and does not stop or detect a photovoltaic array both end voltage every a time cycle, works as inspection
When surveying the system without output voltage or when output voltage is lower than the total voltage in SCM program, then single-chip microcomputer output pin exports
Switch controlling signal will switch S2 and disconnect, and S3 closures, now the positive and negative electrode of corresponding battery pack 1 passes through resistance R short circuits and the electricity
The disconnection that concatenates of the positive pole of pond group 1 and the negative pole of next battery pack 1, short circuit current flow through resistance R, sampling resistor R both ends electricity
Pressure is read into input port, compared with default sample voltage value in program：If sample voltage value is normal, single-chip microcomputer according to
Pre-set programs close S2 by output port output switch control signal and disconnect S3；If sampled voltage is serious less than normal or without sampling electricity
Press, then single-chip microcomputer closes S2, S4 according to pre-set programs by output port output switch control signal, disconnects S1, now the battery
Group 1 is shorted.The detection of next battery pack 1 is carried out by switch selection circuit module, so completes and utilizes single-chip microcomputer system
System detects the sampled voltage of different battery packs 1 and completes the function of respective switch operation at times.
The principle described in the preceding paragraph, for advantage of this system is that：When certain battery pack 1 is breaking in photovoltaic array
Due to when the internal resistance of silicon chip quality problems itself causes greatly total output voltage to be decreased obviously very much, can automatically by it from system short circuit,
Ensure typical case's conducting of series circuit, if the battery pack 1 of open circuit is less, the influence of total output voltage is smaller, can still expire
Charging of the foot to battery, avoid photovoltaic generating system because of the open circuit of battery pack 1 of a certain series connection the situation without output voltage.
As shown in figure 3, for the array structure in parallel again of first connecting being commonly used in practice, it is single because used in
The specification of body cell piece 2 is identical, such as common 22cm × 22cm polysilicon chip, and its output voltage is consistent with power, because
This can be converted into after structure as shown in Figure 1 using the present invention.Such as：8 tunnels are in parallel, 5 cell pieces of each route
The photovoltaic battery array of series connection, the series connection of 5 Battery pack groups is convertible into, is made up of per Battery pack group 8 cell pieces in parallel
Array.
Finally, to single-chip microcomputer or PC control systems, system total voltage and sampling resistor short-circuit voltage is pre- when writing program
First write-in value should be smaller than normal operating value, and to adapt to the needs of voltage normal fluctuation range, specific degree less than normal regards specific generate electricity
Systematic parameter determines；It should be finally fixed according to single-chip microcomputer and be placed in the photovoltaic cell chip arrays back side and keep certain with the back side
Distance or other shady places avoid temperature too high.Specific control program is selected on single-chip microcomputer or PC control systems and external circuitses
Be written as technical staff and can write completion, will not be repeated here.
The application example of technical solution of the present invention is described in detail above, it is only provided as an example, is not intended as the present invention
Application limitation.The equivalent substitution of all operating conditions, is within the scope of the present invention.
Claims (6)
1. a kind of method of photovoltaic generating system automatic detection and failture evacuation, it is characterised in that specifically include following steps：
1）For photovoltaic generating system, one central control system is set；
2）Each concatenation one can on the positive and negative electrode lead of each battery pack in the photovoltaic cell chip arrays of photovoltaic generating system
Control switch；Gate-controlled switch and sampling resistor short circuit by the positive and negative electrode of each battery pack by a series connection, by the sampling
The gate-controlled switch of resistor coupled in parallel one；The sampling resistor is connected to the signal acquisition module of central control system, it is described controllable to open
Close the switch control module for being connected to central control system；
3）The gate-controlled switch concatenated on the positive and negative electrode lead of each battery pack is normally closed, and remaining gate-controlled switch is normally opened, utilizes program
The output total voltage of photovoltaic generating system is detected by the signal acquisition module of central control system；
4）If total voltage is exported less than total voltage preset value in program, the output pin of the switch control module of central control system
Output switch control signal
Open the gate-controlled switch that concatenates on first battery anode lead, close between the positive and negative electrode of first battery pack with
The gate-controlled switch of resistant series makes the short circuit current of first battery pack flow through sampling resistor；
5）The short circuit current or resistive voltage of sampling resistor are detected by the signal acquisition module of central control system with program, if
High compared with short circuit current or resistive voltage is preset in program, then that recovers to concatenate on first battery pack positive and negative electrode lead controllable opens
Close state normally closed, that other two gate-controlled switch is normally opened；If compared with short circuit current is preset in program or resistive voltage is small, the is closed
The gate-controlled switch and gate-controlled switch in parallel with a resistor concatenated on one battery anode lead, open first battery electrode
The gate-controlled switch concatenated on lead, by first battery pack short circuit；
6）Second battery pack, repeat step 4 are chosen using programme-control）With 5）；The like a to the last battery pack
Repeat step 4）With 5）Finish.
2. photovoltaic generating system according to claim 1, it is characterised in that：The signal acquisition mould of the central control system
Block and switch control module are respectively connecting on sampling resistor and each switch through switch selection circuit module.
3. photovoltaic generating system according to claim 1, it is characterised in that：The central control system is PC control systems
Or single-chip microcomputer.
4. photovoltaic generating system according to claim 1, it is characterised in that：Each in the photovoltaic cell chip arrays
Battery pack can be cell piece, or the parallel-connection structure of cell piece；Battery described in the photovoltaic cell chip arrays
Group is in series.
5. photovoltaic generating system according to claim 1, it is characterised in that：The sampling resistor can be by concatenating an electric current
The mode of sensor is connected to signal acquisition module, can also use and resistance both end voltage directly is connected into signal acquisition module
Mode.
6. photovoltaic generating system according to claim 1, it is characterised in that：The switch is relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710622717.3A CN107370455A (en) | 2017-07-27 | 2017-07-27 | A kind of automatic monitoring of photovoltaic cell system and troubleshooting methodology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710622717.3A CN107370455A (en) | 2017-07-27 | 2017-07-27 | A kind of automatic monitoring of photovoltaic cell system and troubleshooting methodology |
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|---|---|
| CN107370455A true CN107370455A (en) | 2017-11-21 |
Family
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395118A (en) * | 2017-08-01 | 2017-11-24 | 孙睿超 | A kind of intelligent photovoltaic cell system monitoring and troubleshooting methodology design |
| CN107947739A (en) * | 2017-12-29 | 2018-04-20 | 无锡十新能源投资有限公司 | A kind of photovoltaic panel fault location system and method based on switch matrix |
| CN108802473A (en) * | 2018-03-05 | 2018-11-13 | 博科能源系统(深圳)有限公司 | Battery pack cascade voltage acquisition system and more battery pack cascade voltage acquisition systems |
| CN108964608A (en) * | 2018-06-30 | 2018-12-07 | 苏州格远电气有限公司 | String type photovoltaic array veneer System of voltage acquisition and method |
| CN109613331A (en) * | 2018-12-19 | 2019-04-12 | 广东电网有限责任公司 | A kind of alternating current charging stake detection load and method based on double load arrays |
| CN109901051A (en) * | 2019-03-01 | 2019-06-18 | 马鞍山创久科技股份有限公司 | A kind of chip Dynamic Current Testing system |
| CN110514989A (en) * | 2019-08-23 | 2019-11-29 | 南京军上电子科技有限公司 | High-voltage relay and battery pack high-voltage relay fault diagnosis system |
| CN117477745A (en) * | 2023-11-02 | 2024-01-30 | 中环艾能(高邮)能源科技有限公司 | Reconfigurable photovoltaic cell system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107395118A (en) * | 2017-08-01 | 2017-11-24 | 孙睿超 | A kind of intelligent photovoltaic cell system monitoring and troubleshooting methodology design |
| CN107947739A (en) * | 2017-12-29 | 2018-04-20 | 无锡十新能源投资有限公司 | A kind of photovoltaic panel fault location system and method based on switch matrix |
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| CN109613331A (en) * | 2018-12-19 | 2019-04-12 | 广东电网有限责任公司 | A kind of alternating current charging stake detection load and method based on double load arrays |
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| CN109901051A (en) * | 2019-03-01 | 2019-06-18 | 马鞍山创久科技股份有限公司 | A kind of chip Dynamic Current Testing system |
| CN110514989A (en) * | 2019-08-23 | 2019-11-29 | 南京军上电子科技有限公司 | High-voltage relay and battery pack high-voltage relay fault diagnosis system |
| CN117477745A (en) * | 2023-11-02 | 2024-01-30 | 中环艾能(高邮)能源科技有限公司 | Reconfigurable photovoltaic cell system |
| CN117477745B (en) * | 2023-11-02 | 2024-05-17 | 中环艾能(高邮)能源科技有限公司 | Reconfigurable photovoltaic cell system |
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Application publication date: 20171121 |