CN107395118A - A kind of intelligent photovoltaic cell system monitoring and troubleshooting methodology design - Google Patents
A kind of intelligent photovoltaic cell system monitoring and troubleshooting methodology design Download PDFInfo
- Publication number
- CN107395118A CN107395118A CN201710648699.6A CN201710648699A CN107395118A CN 107395118 A CN107395118 A CN 107395118A CN 201710648699 A CN201710648699 A CN 201710648699A CN 107395118 A CN107395118 A CN 107395118A
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- switch
- battery pack
- photovoltaic
- generating system
- photovoltaic generating
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- 238000000034 method Methods 0.000 title claims abstract description 7
- 238000013461 design Methods 0.000 title description 6
- 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 11
- 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
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 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
- 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
- 238000011835 investigation Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000013082 photovoltaic technology Methods 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
- 230000003245 working 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 intelligent photovoltaic electrification component, can conveniently be detected in particular to one kind
The design of the photovoltaic cell chip arrays of cell piece working condition and the automatic cell piece short circuit that will be unable to normal work.
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 caused by self reason internal resistance is excessive
And having dragged down total output voltage can not charge to battery.If damage cell piece is replaced with into wire, usual feelings automatically
Though output voltage slightly reduces compared with normal voltage value under condition, but still can meet the charging requirement of battery, make photovoltaic generating system
It can still be continued to run with before maintenance is concentrated next time.
The content of the invention
It is an object of the invention to provide a kind of design of intelligent photovoltaic cell system and the method for detection and failture evacuation, its
The cell piece in photovoltaic power generation array is detected using information acquisition module, if found the abnormal situation, utilizes simple control
Circuit processed automatically can replace the cell piece short circuit of damage, ensure the normal operation of photovoltaic system, significantly reduce photovoltaic technology
The repair rate of 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 on the positive and negative electrode lead of each battery pack in the photovoltaic cell chip arrays of photovoltaic generating system
Controllable single-pole double-throw switch (SPDT)；Gate-controlled switch and sampling resistor short circuit by the positive and negative electrode of each battery pack by a series connection；
The sampling resistor is connected to the information acquisition module of central control system, the gate-controlled switch is connected to center control system
The switch control module of system；
3）By the single-pole double-throw switch (SPDT) concatenated on the battery pack positive and negative electrode lead, all battery packs are made to keep series connection,
Rest switch disconnects, and the output for detecting photovoltaic generating system by the information acquisition module of central control system using program is always electric
Pressure；
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 the moved end of single-pole double-throw switch (SPDT) is connected to the other end, be closed at the positive and negative electrode of first battery pack
Between the gate-controlled switch connected with sampling resistor the short circuit current of first battery pack is flowed through sampling resistor；
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
Compared with short circuit current or resistive voltage height is preset in program, then the 3 of first battery pack switch returns back to 3）State；If compared with program
In preset short circuit current or resistive voltage is small, then 3 of first battery pack switches keep 4）State is constant；
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.
The central control system is PC control systems or single-chip microcomputer.
Each battery pack in the photovoltaic cell chip arrays can be cell piece, or cell piece
Parallel-connection structure；The photovoltaic cell chip arrays are in series by the battery pack.
The sampling resistor can be connected to information acquisition module by way of concatenating a current sensor, can also use
Resistance both end voltage is directly connected to the mode of information acquisition module.
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.Meanwhile total output voltage is only slightly reduced during detecting and fixing a breakdown, therefore do not influence photovoltaic generation
System charges normal to battery.
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 sampled signal of the sampling resistor R is connected to an information acquisition module, the institute through wire
There is switch to be connected to switch control module.To avoid making signal graph line in disorder, the succinct in order to retouching of schematic diagram is kept
The course of work of the present invention is stated, and because the sampling resistor R and switch of all photovoltaic cell groups 1 are connected to information gathering through wire
Module is identical with the mode of switch control module, therefore a photovoltaic in photovoltaic cell chip arrays is only depicted in accompanying drawing 1
The sampling resistor R and switch of battery pack 1 are connected to information acquisition module and switch control module through wire, and it is had no effect on to reality
Apply the introduction of example.
The sampled signal of the sampling resistor R both can directly concatenate a current sensor, by the output of current sensor
End is connected to information acquisition module；Or by the way of voltage sample, resistance both sides voltage is connected to through wire respectively
Information acquisition module.Described information acquisition module and switch control module can be a PC control systems, pass through external switch
Circuit module after the I/O mouths extension of PC control systems to being respectively connecting on sampling resistor and each switch；It is wherein described external
Switch selection circuit module can voluntarily determine according to the scale of photovoltaic battery array, such as：Photovoltaic battery array in the present embodiment
For the battery pack 1 of 8 series connection, each battery pack 1 is 8 cell pieces in parallel, then from the switch selection circuit on 64 tunnels
Module can meet；Described information acquisition module and switch control module can also be SCM systems, pass through external switch
Circuit module is extended to the I/O mouths of single-chip microcomputer, using the method for time sharing sampling, using single-chip microcomputer input port at times
The data for sampling different battery packs 1 are handled, and then pass through switch by single-chip microcomputer output mouth output switch control signal
Selection circuit module 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, using single-chip microcomputer as control system as
Example, the course of work of the system is introduced with reference to accompanying drawing 1-2：Switch S1, S2 of the system single-pole double throw moved end, i.e. " knife " are respectively
It is placed in A, A ' end points, switch S3 and be in normally open, then all tandem workings of battery pack 1 in photovoltaic power generation array under the state；
Single-chip microcomputer performs the total voltage that pre-set programs are not stopped or a photovoltaic array both ends are detected every a time cycle, when detection sheet
It is under normal circumstances photovoltaic power generation array when system is without output voltage or when output voltage is lower than the total voltage in SCM program
In some battery pack 1 can not just produce work, it is when causing the photovoltaic power generation array of whole cascaded structure without output voltage or defeated
The total voltage gone out in voltage ratio SCM program is low.Now, single-chip microcomputer output pin exports high low potential " 0 ", " 1 " form is opened
Control signal is closed, the moved end for switching S1, S2 is respectively placed in B, B ' end points, S3 closures, now corresponding battery pack 1 is positive and negative
Pole is isolated out by resistance R short circuits and the battery pack 1 from the photovoltaic power generation array of cascaded structure, and short circuit current flows through electricity
R is hindered, sampling resistor R both end voltages are read into input port, compared with default sample voltage value in program：If sampled voltage
Value is normal, then single-chip microcomputer will be switched S1, S2 moved end point according to pre-set programs again by output port output switch control signal
It is not placed in A, A ' end points, S3 disconnections；If sampled voltage is serious less than normal or without sampled voltage, single-chip microcomputer output mouth attonity, respectively
On off state keeps constant.Then the detection of next battery pack 1 is carried out by switch selection circuit module, so completes profit
Detect the sampled voltage of different battery packs 1 at times with SCM system and complete the function of respective switch operation.
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 on road 2 is less, the influence of total output voltage is smaller, can still meet
Charging to battery, avoid photovoltaic system because of the open circuit of the battery pack 1 of a certain series connection the situation without output voltage.Exist simultaneously
Total output voltage is only slightly reduced during detecting and fixing a breakdown, and the value that voltage reduces is detected list
The value of body cell piece, such as the operating voltage of common 22cm × 22cm polysilicon chip, therefore not shadow under normal circumstances
Photovoltaic generating system is rung to charge normal battery.
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 is identical, such as common 22cm × 22cm polysilicon chip, and its output voltage is consistent with power, therefore
It can be converted into after structure as shown in Figure 1 using the present invention.Such as：8 tunnels are in parallel, 5 cell piece strings of each route
The photovoltaic battery array of 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 on the positive and negative electrode lead of each battery pack in the photovoltaic cell chip arrays of photovoltaic generating system
Controllable single-pole double-throw switch (SPDT)；Gate-controlled switch and sampling resistor short circuit by the positive and negative electrode of each battery pack by a series connection；
The sampling resistor is connected to the information acquisition module of central control system, the gate-controlled switch is connected to center control system
The switch control module of system；
3）By the single-pole double-throw switch (SPDT) concatenated on the battery pack positive and negative electrode lead, all battery packs are made to keep series connection,
Rest switch disconnects, and the output for detecting photovoltaic generating system by the information acquisition module of central control system using program is always electric
Pressure；
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 the moved end of single-pole double-throw switch (SPDT) is connected to the other end, be closed at the positive and negative electrode of first battery pack
Between the gate-controlled switch connected with sampling resistor the short circuit current of first battery pack is flowed through sampling resistor；
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
Compared with short circuit current or resistive voltage height is preset in program, then the 3 of first battery pack switch returns back to 3）State；If compared with program
In preset short circuit current or resistive voltage is small, then 3 of first battery pack switches keep 4）State is constant；
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 |
|---|---|---|---|
| CN201710648699.6A CN107395118A (en) | 2017-08-01 | 2017-08-01 | A kind of intelligent photovoltaic cell system monitoring and troubleshooting methodology design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710648699.6A CN107395118A (en) | 2017-08-01 | 2017-08-01 | A kind of intelligent photovoltaic cell system monitoring and troubleshooting methodology design |
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| Publication Number | Publication Date |
|---|---|
| CN107395118A true CN107395118A (en) | 2017-11-24 |
Family
ID=60343626
Family Applications (1)
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|---|---|---|---|
| CN201710648699.6A Pending CN107395118A (en) | 2017-08-01 | 2017-08-01 | A kind of intelligent photovoltaic cell system monitoring and troubleshooting methodology design |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109981050A (en) * | 2017-12-28 | 2019-07-05 | 中电电气(上海)太阳能科技有限公司 | A method of quickly determining inefficient |
| CN112383054A (en) * | 2020-11-19 | 2021-02-19 | 珠海格力电器股份有限公司 | Photovoltaic power generation system, fault processing method thereof and power generation equipment |
| CN113422422A (en) * | 2021-08-25 | 2021-09-21 | 绵阳天仪空间科技有限公司 | Satellite energy system |
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Application publication date: 20171124 |