CN107547046A - A kind of automatic detection and troubleshooting methodology of intelligent photovoltaic cell system - Google Patents
A kind of automatic detection and troubleshooting methodology of intelligent photovoltaic cell system Download PDFInfo
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- CN107547046A CN107547046A CN201710781161.2A CN201710781161A CN107547046A CN 107547046 A CN107547046 A CN 107547046A CN 201710781161 A CN201710781161 A CN 201710781161A CN 107547046 A CN107547046 A CN 107547046A
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- automatic detection
- central control
- photovoltaic
- photovoltaic generating
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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
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 go out in parallel photovoltaic array to be unable to maintain that fault branch that normal voltage exports is dynamic and disconnecting, reduce because in photovoltaic power generation array each branch voltage it is unbalanced caused by the influence that is subject to of power output.
Description
Technical field
The present invention relates to a kind of design of photovoltaic electrification component based on central control system and automatic detection and failure to arrange
The method removed, in particular to it is a kind of can conveniently detection cell piece working condition and carry out ball bearing made conversion side
Method.
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, a certain cell piece or the generating event of a certain branch road in system often occurs
Barrier causes the balanced electric current that occurs of each branch voltage to pass through phenomenon, has a strong impact on charge efficiency.For example, in photovoltaic power generation array for simultaneously
Be coupled structure, and each branch road is in the case of cell piece is in series, often occur in which in a branch road some or
Several cell pieces break down, and cause the voltage of the branch road to reduce, cause the electric current fault branch of falling injection of other normal branch roads,
Have a strong impact on the delivery efficiency of photovoltaic power generation array.
The content of the invention
It is an object of the invention to provide a kind of photovoltaic generation group automatic detection and failture evacuation based on central control system
Method, it is detected using information acquisition module to the cell piece in photovoltaic power generation array, if found the abnormal situation, utilize
Simple ON-OFF control circuit automatically can disconnect the battery pack of damage, make photovoltaic generating system in charge efficiency not by obvious
Worked in the case of influence, until regular maintenance.
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）The photovoltaic power generation array of photovoltaic generating system is parallel-connection structure and each branch route cell piece and is in series, each
Positive terminal one gate-controlled switch of series connection of branch road, negative pole set a sampling apparatus；The sampling apparatus is connected to central control
The information acquisition module of system, the gate-controlled switch are connected to the switch control module of central control system；
3）Keep all gate-controlled switches normally closed, each is detected successively by the information acquisition module of central control system using program
The sample rate current of sampling apparatus on road；
4）Central control system according to program is write in advance, successively by the branch current value currently gathered and a upper branch for collection
The current value on road carries out additive operation；If the numerical value after computing is more than a default positive threshold current in program, utilize
The switch control module of central control system disconnects the gate-controlled switch of a upper branch road, and otherwise maintained switch state is constant.
Further, the present invention can utilize following technical scheme to realize：
The central control system is PC control systems or single-chip microcomputer.
The sampling apparatus is a current sensor for being connected to information acquisition module, or a both end voltage is connected to
The series resistance of information acquisition module.
The current sensor is the Hall sensor being enclosed on wire.
The switch is relay.
The advantages of this programme, is：There is branch road failure in photovoltaic battery array, cause output voltage to become hour, be
System can automatically identify fault branch by detection, while fault branch is disconnected, and can so avoid the electric current failure of falling injection
Branch road, ensure open-circuit voltage, make charge power not significantly affected.
Brief description of the drawings
Fig. 1 is the structural representation of photovoltaic system of the present invention.
Embodiment
The present invention is more fully described hereinafter with reference to accompanying drawing 1, in illustrating below, eliminates to those skilled in that art
The description of known features and technology.As shown in fig. 1, this photovoltaic power generation array is made up of 8 branch circuit parallel connections, each branch route
Photovoltaic cell 1 is in series.In the switch S1 ... S8 of anode series connection one of each branch road, negative electrode is provided with a sampling apparatus 2
It is connected to information acquisition module.In this example, sampling apparatus is the Hall sensor being enclosed on wire, but can also use other
Current data is delivered to intelligence sample module by the current sensor of species, or using a resistance of directly connecting, is then gathered
The mode of resistance both end voltage is completed to sample.
Described information acquisition module and switch control module are connected with central control system by I/O mouths and by default
Program carries out data communication, such as：Central control system sends " 2 " to information acquisition module, then information acquisition module is by the 2nd article
The gathered data of branch road is sent into central control system and handled；Or central control system sends " 2 " to switch control module, then
Switch control module output control signal switches off the 2nd article of branch road.
On the basis of above-mentioned design, using single-chip microcomputer as central control system exemplified by, introduce the system with reference to accompanying drawing 1
The course of work：It is normally off during the system switch S1, S2 ... S8 normal works；Single-chip microcomputer performs pre-set programs and not stopped or often
The electric current in a photovoltaic array in each branch road is detected successively every a time cycle, then using program by the latter branch road
Electric current does additive operation with previous branch current, i.e. the second branch current subtracts tie point electric current, and the 3rd branch current subtracts the second
Branch current, subtract the electric current of the 8th branch road to the electric current of tie point by that analogy, if gained current differential forward direction is excessive successively,
More than the predetermined threshold value electric current in program, then illustrate that the electric current of previous branch road is too small, single-chip microcomputer performs the program write in advance and led to
Cross the switch that switch control module disconnects the branch road.
The principle described in the preceding paragraph, for advantage of this system is that：When a certain cell piece 1 in photovoltaic array can not
Work, when branch road where it can not normally export full-amount voltage, the branch road is disconnected, this avoid the branch of other normal works
Road is by the electric current fault branch of falling injection, and on the basis of photovoltaic battery array voltage is ensured, electric current is only reduced by about 1/ in theory
8, the influence excessively reduced to charge efficiency of the electric current avoided.
In addition, first by the elder generation of photovoltaic cell 1 and be unified into battery pack for what is be commonly used in practice, then by battery pack that
The array structure of this series connection, the specification of cell piece is identical because used in, such as common 22cm × 22cm polysilicon
Piece, its output voltage is consistent with power, thus can by its equivalent transformation into after photovoltaic array structure as shown in Figure 1 using this
Invention.Such as：8 groups of series connection, each group, by 8 cell pieces photovoltaic battery array in parallel, is convertible into the parallel connection of 8 tunnels, often
The array that the cell piece of 8 series connection of route is formed.
Finally, 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.On single-chip microcomputer or PC control systems and the volume of the specific control program of external connection module
Completion can be write by being written as technical staff, 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 (5)
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）The photovoltaic power generation array of photovoltaic generating system is parallel-connection structure and each branch route cell piece and is in series, each
Positive terminal one gate-controlled switch of series connection of branch road, negative pole set a sampling apparatus；The sampling apparatus is connected to central control
The information acquisition module of system, the gate-controlled switch are connected to the switch control module of central control system；
3）Keep all gate-controlled switches normally closed, each is detected successively by the information acquisition module of central control system using program
The sample rate current of sampling apparatus on road；
4）Central control system according to program is write in advance, successively by the branch current value currently gathered and a upper branch for collection
The current value on road carries out additive operation；If the numerical value after computing is more than a default positive threshold current in program, utilize
The switch control module of central control system disconnects the gate-controlled switch of a upper branch road, and otherwise maintained switch state is constant.
2. the method for photovoltaic generating system automatic detection according to claim 1 and failture evacuation, it is characterised in that：It is described
Central control system is PC control systems or single-chip microcomputer.
3. the method for photovoltaic generating system automatic detection according to claim 1 and failture evacuation, it is characterised in that：It is described
Sampling apparatus is a current sensor for being connected to information acquisition module, or a both end voltage is connected to information acquisition module
Series resistance.
4. the method for photovoltaic generating system automatic detection according to claim 4 and failture evacuation, it is characterised in that：It is described
Current sensor is the Hall sensor being enclosed on wire.
5. the method for photovoltaic generating system automatic detection according to claim 1 and failture evacuation, it is characterised in that：It is described
Switch as relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710781161.2A CN107547046A (en) | 2017-09-01 | 2017-09-01 | A kind of automatic detection and troubleshooting methodology of intelligent photovoltaic cell system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710781161.2A CN107547046A (en) | 2017-09-01 | 2017-09-01 | A kind of automatic detection and troubleshooting methodology of intelligent photovoltaic cell system |
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| CN107547046A true CN107547046A (en) | 2018-01-05 |
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| US20120239322A1 (en) * | 2011-03-17 | 2012-09-20 | Kabushiki Kaisha Toshiba | Abnormality diagnosis device, method therefor, and computer-readable medium |
| CN103884988A (en) * | 2012-12-21 | 2014-06-25 | 比亚迪股份有限公司 | Battery pack fault detection device and detection method |
| CN104796082A (en) * | 2015-04-22 | 2015-07-22 | 中国科学院广州能源研究所 | System and method for diagnosing faults of photovoltaic power generation systems in online manner |
| CN105403816A (en) * | 2015-10-30 | 2016-03-16 | 国家电网公司 | Identification method of DC fault electric arc of photovoltaic system |
| US20170110873A1 (en) * | 2015-10-14 | 2017-04-20 | Solaredge Technologies Ltd. | Fault Detection System and Circuits |
-
2017
- 2017-09-01 CN CN201710781161.2A patent/CN107547046A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120239322A1 (en) * | 2011-03-17 | 2012-09-20 | Kabushiki Kaisha Toshiba | Abnormality diagnosis device, method therefor, and computer-readable medium |
| CN102608512A (en) * | 2012-04-11 | 2012-07-25 | 上海电力学院 | Method for on-line detecting faults of photovoltaic cells in solar photovoltaic power station on line |
| CN103884988A (en) * | 2012-12-21 | 2014-06-25 | 比亚迪股份有限公司 | Battery pack fault detection device and detection method |
| CN104796082A (en) * | 2015-04-22 | 2015-07-22 | 中国科学院广州能源研究所 | System and method for diagnosing faults of photovoltaic power generation systems in online manner |
| US20170110873A1 (en) * | 2015-10-14 | 2017-04-20 | Solaredge Technologies Ltd. | Fault Detection System and Circuits |
| CN105403816A (en) * | 2015-10-30 | 2016-03-16 | 国家电网公司 | Identification method of DC fault electric arc of photovoltaic system |
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