CN103780204B - The fault detection method of photovoltaic substrate group string - Google Patents
The fault detection method of photovoltaic substrate group string Download PDFInfo
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- CN103780204B CN103780204B CN201410025956.7A CN201410025956A CN103780204B CN 103780204 B CN103780204 B CN 103780204B CN 201410025956 A CN201410025956 A CN 201410025956A CN 103780204 B CN103780204 B CN 103780204B
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- 239000000758 substrate Substances 0.000 title claims abstract description 185
- 238000001514 detection method Methods 0.000 title claims abstract description 87
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000004888 barrier function Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 description 18
- 238000007689 inspection Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004886 process control Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008439 repair process 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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Abstract
The invention discloses a kind of failure detector and the method for photovoltaic substrate group string.Described device includes Function detection end and remotely controls display end；Described long-range control display end is for generating the first remote control commands；Described Function detection end, under the control of the first remote control commands generated at described long-range control display end, detects the output voltage of photovoltaic substrate group string, and the output voltage detected is sent to described long-range control display end；Described long-range control display end is additionally operable to show the output voltage that described Function detection end sends.Testing result directly can be shown to testing staff by remotely controlling display end by the present invention, testing staff is passed through remotely control display end at the link position of photovoltaic substrate, to obtain the output voltage of photovoltaic substrate group string, and the outgoing position that need not return to photovoltaic substrate group string obtains the output voltage of photovoltaic substrate group string, improve detection efficiency, solve the problem that detection efficiency in prior art is low.
Description
Technical field
The present embodiments relate to photovoltaic power generation technology, particularly relate to the fault detect of a kind of photovoltaic substrate group string
Device and method.
Background technology
In the type photovoltaic generating system of power station, substantial amounts of photovoltaic substrate to be used to convert the solar into electric energy.By
Less in voltage and the power of single substrate, generally multiple photovoltaic substrates are together in series and are grouped string, to increase
The most total output voltage, after being confluxed by multiple groups of strings by collector-shoe gear, then is input to photovoltaic inversion the most again
Device.
Difference according to single photovoltaic substrate open-circuit voltage and the difference of photovoltaic DC-to-AC converter input voltage range, often
The quantity of the photovoltaic substrate that individual group of string is connected is different, usually 20 to 30 pieces.These photovoltaic substrates
Output lead generally connected by special joint, owing to the number of substrates involved is numerous, these joints exist
Due to a variety of causes, loose contact can occur unavoidably during installation, situation about even opening a way.Therefore at base
Before plate is connected to collector-shoe gear, it will usually go to detect each group of string by circuit tester under conditions of having sunshine
Output voltage, and then judge the connection state of photovoltaic substrate group string.
If detecting, certain group string output voltage is on the low side a lot of or without output voltage, then explanation group is serially connected with and asks
Topic.In prior art, generally using two kinds of methods, one is to check this group string each joint connection state also
To suspecting that problematic joint carries out Measuring error, group of running back the most again string outfan detection voltage is the most just
Really.The problem of this method is possible to need testing staff to carry out fallback could solve problem, during waste several times
Between.Another kind of method is the need for two testing staff, and a personal responsibility circuit tester detects output voltage,
Another person goes to check that joint, two people carry out communication by communication device and confirm that output is the most normal.This
The problem of method is waste of manpower, it is also possible to because information communication causes problem to solve in time the most comprehensively
Certainly.It addition, it is problematic to be typically difficult to detect some contacts by the method for test output voltage, but contact electricity
Resistance is not the most king-sized fault.In general, these method detection efficiencies are relatively low.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of failure detector and the method for photovoltaic substrate group string,
To improve detection efficiency.
First aspect, embodiments provides the failure detector of a kind of photovoltaic substrate group string, described
Device includes Function detection end and remotely controls display end；
Described long-range control display end is for generating the first remote control commands；
The control of the described Function detection end the first remote control commands for generating at described long-range control display end
Under system, detection photovoltaic substrate group string output voltage, and the output voltage detected is sent to described remotely
Control display end；
Described long-range control display end is additionally operable to show the output voltage that described Function detection end sends.
Second aspect, the embodiment of the present invention additionally provides the fault detection method of a kind of photovoltaic substrate group string, institute
The method of stating includes:
Examine with the display end remote control function test side that remotely controls of the failure detector of photovoltaic substrate in batch string
The output voltage of light-metering volt substrate in batch string；
If described long-range control display end shows the described photovoltaic substrate group string that described Function detection end detects
Output voltage less than the first predetermined voltage threshold, it is determined that described photovoltaic substrate group string the first kind occurs therefore
Barrier, wherein, described first kind fault shows as photovoltaic substrate group string joint open circuit；
If described long-range control display end shows the described photovoltaic substrate group string that described Function detection end detects
Output voltage between described first predetermined voltage threshold and described second predetermined voltage threshold, it is determined that
There is Equations of The Second Kind fault in described photovoltaic substrate group string, and wherein, described Equations of The Second Kind fault shows as photovoltaic substrate group
String joint loose contact.
The failure detector of the photovoltaic substrate group string that the embodiment of the present invention provides and method, by remotely controlling
Display end generates the first control instruction, and Function detection end detects photovoltaic substrate under the control of the first control instruction
The output voltage of group string, and testing result is sent to remotely controls display end shows so that detection people
Member can obtain the output of photovoltaic substrate group string by remotely controlling display end at the link position of photovoltaic substrate
Voltage, and the outgoing position that need not return to photovoltaic substrate group string obtains the output voltage of photovoltaic substrate group string,
Improve detection efficiency, solve the problem that detection efficiency in prior art is low.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the failure detector of a kind of photovoltaic substrate group string that the embodiment of the present invention provides；
Fig. 2 is the Function detection end in the failure detector of the photovoltaic substrate group string that the embodiment of the present invention provides
A kind of schematic diagram；
Fig. 3 is that remotely controlling in the failure detector of the photovoltaic substrate group string that the embodiment of the present invention provides shows
Show a kind of schematic diagram of end；
Fig. 4 is the flow chart of the fault detection method of a kind of photovoltaic substrate group string that the embodiment of the present invention provides；
Fig. 5 is the flow chart of the fault detection method of a kind of photovoltaic substrate group string that the embodiment of the present invention provides.
Detailed description of the invention
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.It is understood that this
Specific embodiment described by place is used only for explaining the present invention, rather than limitation of the invention.The most also need
Be noted that for the ease of describing, accompanying drawing illustrate only part related to the present invention and not all in
Hold.
Fig. 1 is the schematic diagram of the failure detector of a kind of photovoltaic substrate group string that the embodiment of the present invention provides,
The failure detector of the photovoltaic substrate group string that the present embodiment provides can be used for detecting the event in photovoltaic substrate group string
Barrier.As it is shown in figure 1, the failure detector of the photovoltaic substrate group string of the present embodiment offer includes Function detection
End 110 and remotely control display end 120.Wherein, described Function detection end 110 is contacted with photovoltaic substrate group
Connecing, described long-range control display end 120 can be carried with by testing staff, and Function detection end 110 is with remote
Process control display end 120 can be realized and the communicating of the other side by communication modes, Function detection end 110 in Fig. 1
With remotely control display end 120 wireless connections.Utilize the fault inspection of the photovoltaic substrate group string that the present embodiment provides
Survey device can a photovoltaic substrate group string be detected, it is also possible to multiple photovoltaic substrate group strings are examined
Survey.
Described long-range control display end 120 is for generating the first remote control commands.Described first remotely controls
Instruction is the instruction controlling the output voltage that Function detection end 110 detects photovoltaic substrate group string.Remotely control aobvious
Show that the first remote control commands generated can be sent to by end 120 by wireless telecommunications or wire communication mode
Function detection end.
Described Function detection end 110 is for remotely controlling the first of the generation of described long-range control display end 120
Under the control of instruction, the output voltage of detection photovoltaic substrate group string, and the output voltage detected is sent to
Described long-range control display end 120.Function detection end is connect by wireless communication mode or restricted communication mode
Receive the first remote control commands remotely controlling display end 120, and according to the first remote control commands detection light
The output voltage of volt substrate in batch string, and show by the output voltage detected is sent to described long-range control
End 120.
Described long-range control display end 120 is additionally operable to show the output electricity that described Function detection end 110 sends
Pressure.Such as, remotely control display end 120 to be examined with function by wireless communication mode or wire communication mode
Surveying end 110 mutual (Fig. 1 provide be radio connection), receive capabilities test side 110 sends to be come
The output voltage of photovoltaic substrate group string, and show.Show that function is examined by remotely controlling display end 120
Survey end 110 and send the output voltage of coming, testing staff can be allowed to recognize the output electricity of photovoltaic substrate group string
Pressure, tentatively judges the fault type of photovoltaic substrate group string, thus for the failure classes of each photovoltaic substrate group string
Further detection made by type, to fix a breakdown.
The present embodiment generates the first control instruction by remotely controlling display end, and Function detection end controls first
The output voltage controlling lower detection photovoltaic substrate group string of instruction, and be sent to testing result remotely control to show
Show that end shows so that testing staff can be at the link position of photovoltaic substrate by remotely controlling display end
Place obtains the output voltage of photovoltaic substrate group string, and the outgoing position that need not return to photovoltaic substrate group string obtains
The output voltage of photovoltaic substrate group string, improves detection efficiency, solves detection efficiency in prior art low
Problem.
When the Function detection end that remotely control display end shows sends the output voltage come more than the second predetermined threshold value
Time, photovoltaic substrate group string there will still likely be fault, in order to fault be detected further and get rid of this fault, needs
Further to detect.Exemplary, described long-range control display end can be additionally used in generation second and remotely controls
Instruction, described Function detection end detects described photovoltaic substrate group string under the control of the second remote control commands
Short circuit current.By detection short circuit current, in the case of having junction contacts bad, short circuit current can become
Little, thus judge that the joint between the photovoltaic substrate in photovoltaic substrate group string exists contact according to short circuit current
Bad problem, repairs this problem by hand inspection or other modes.
When the Function detection end that remotely control display end shows sends the output voltage come between the first predetermined threshold value
And time between the second predetermined threshold value, there is loose contact in the joint between photovoltaic substrate in photovoltaic substrate group string
Fault, in order to find fault joint further, need further detection, can be by detection photovoltaic base
The temperature of the joint between photovoltaic substrate in plate group string finds fault joint.Exemplary, described remotely
Control display end can be additionally used in the temperature of the joint in the described photovoltaic substrate group string of detection between photovoltaic substrate.Logical
Between photovoltaic substrate during the temperature detecting function of process control display end can detect photovoltaic substrate group string too far
The temperature of joint.There are the faults such as loose contact in the joint between photovoltaic substrate in photovoltaic substrate group string
Time, can be by the positive pole of the most repeatedly outfan of short circuit photovoltaic substrate group string and negative pole, such that it is able to add
The caloric value of big out of order joint, can be detected the temperature of each joint, thus sentence by temperature detecting function
Break and out of order joint, it is simple to out of order joint is overhauled or change to get rid of event by testing staff
Barrier.
The failure detector of the photovoltaic substrate group string that the embodiment of the present invention provides can be to a photovoltaic substrate group
String carries out fault detect, it is also possible to multiple photovoltaic substrate group strings are carried out fault detect.
When the failure detector of photovoltaic substrate group string carries out fault detect to multiple photovoltaic substrate group strings, merit
Energy test side needs the function with the output voltage detecting multiple photovoltaic substrate group strings.
Fig. 2 is the Function detection end in the failure detector of the photovoltaic substrate group string that the embodiment of the present invention provides
A kind of schematic diagram, as in figure 2 it is shown, described Function detection end 110 includes: the first control module 111, n
Individual function detection module 112, wireless communication module 113 and the first power supply 114.Wherein, n Function detection
Each function detection module in module connect a photovoltaic substrate group string PV needing detection (PV1,
PV2 ... any one in PVn, wherein, n refers to the photovoltaic substrate group being connected with function detection module
The quantity of string), n photovoltaic substrate group string can be detected simultaneously, be used for measuring corresponding photovoltaic base
The output voltage of plate group string and short circuit current；First wireless communication module 113 is used for receiving and remotely controls to show
Hold the instruction of 120 and be transferred to the first control system, and the first control module is controlled function detection module 112
The testing result detected is sent to remotely control display end 120；First power supply 114 is used for being the first control mould
Block 111 is powered；First control module 111 is for controlling function according to the instruction remotely controlling display end 120
Detection module 112 detects output voltage or the short circuit current of photovoltaic substrate group string, and testing result is passed through
First wireless communication module 113 is transferred to remotely control display end 120.
Fig. 3 is that remotely controlling in the failure detector of the photovoltaic substrate group string that the embodiment of the present invention provides shows
Show a kind of schematic diagram of end, as it is shown on figure 3, described long-range control display end 120 includes: second controls mould
Block 121, temperature detecting module the 122, second wireless communication module 123, display module 124, function button
125 and second source 126.
Remotely control the temperature detecting module 122 of display end 120 for detecting the photovoltaic in photovoltaic substrate group string
The temperature of the joint between substrate, the temperature of the described joint by detecting judges which joint exists and connects
Touch the faults such as bad, thus find fault joint, it is simple to safeguard.Second wireless communication module 123 is used
In realizing the radio communication function with described Function detection end 110.Display module 124 is used for showing that function is examined
Survey end and send the testing result of coming, and remotely control the testing result (such as temperature) of display end 120；Function
Button 125 is mutual for realize with testing staff.Second source 126 is used for being that the second control module supplies
Electricity.Second control module 121 is used for generating control instruction, detects photovoltaic base controlling Function detection end 110
The output voltage of plate group string or short circuit current and the size of the patrol frequency to short circuit current, be additionally operable to control
Display module carries out the display of testing result, and is received from function inspection by the second wireless communication module 123
Survey the testing result of end 110.
When the failure detector of the photovoltaic substrate group string of embodiment of the present invention offer includes the function shown in Fig. 2
Shown in test side and Fig. 3 when remotely controlling display end, by the second control mould remotely controlling display end 120
Photovoltaic substrate group string that block detects as required (such as PV1, PV2 ... in PVn) ID life
Become to detect the instruction of which photovoltaic substrate group string, and be sent to Function detection by the second communication module 123
End 110, Function detection end 110 is received described instruction by the first communication module 113 and is transferred to the first control
Module 111, the first control module 111 uses and remotely controls the display end 120 unification to photovoltaic substrate group string
No. ID, start the Function detection mould that is connected of the photovoltaic substrate group string corresponding with this instruction according to described instruction
Block 112 detects and detects described photovoltaic substrate group string.
Fig. 4 is the flow chart of the fault detection method of a kind of photovoltaic substrate group string that the embodiment of the present invention provides,
The photovoltaic base that the fault detection method of the photovoltaic substrate group string that the present embodiment provides can be provided by above-described embodiment
The failure detector of plate group string realizes.As shown in Figure 4, the fault detection method of photovoltaic substrate group string is concrete
Comprise the steps:
Step 410, remotely controls merit with the display end that remotely controls of the failure detector of photovoltaic substrate in batch string
The output voltage of energy test side detection photovoltaic substrate group string.
The inspection of Function detection end is controlled by the display end that remotely controls of the detection device of the fault of photovoltaic substrate group string
The output voltage of light-metering volt substrate in batch string.
Step 420, if described long-range control display end shows the described light that described Function detection end detects
The output voltage of volt substrate in batch string is less than the first predetermined voltage threshold, it is determined that described photovoltaic substrate group string occurs
First kind fault.
Wherein, described first kind fault shows as photovoltaic substrate group string joint open circuit.
Step 430, if described long-range control display end shows the described light that described Function detection end detects
The output voltage of volt substrate in batch string between described first predetermined voltage threshold and described second predetermined voltage threshold it
Between, it is determined that there is Equations of The Second Kind fault in described photovoltaic substrate group string.
Wherein, described Equations of The Second Kind fault shows as photovoltaic substrate group string joint loose contact.Equations of The Second Kind fault is true
The output voltage of fixed photovoltaic substrate group string is between described first predetermined voltage threshold and described second predeterminated voltage
Between threshold value, including described first predetermined voltage threshold and described second predetermined voltage threshold.
The present embodiment, by detecting the output voltage of photovoltaic substrate group string, judges light according to the size of output voltage
The fault type of volt substrate in batch string, it is simple to testing staff takes appropriate measures according to fault type and gets rid of event
Barrier, improves detection efficiency.
Exemplary, when described long-range control display end shows the described photovoltaic that described Function detection end detects
When the output voltage of substrate in batch string is more than the second predetermined voltage threshold, also include:
Remotely control described Function detection end by described long-range control display end and detect described photovoltaic substrate group string
Short circuit current, if described long-range control display end shows the described short circuit that described Function detection end detects
Electric current is more than predetermined current threshold, it is determined that described photovoltaic substrate group string is normal, otherwise determines described photovoltaic base
There is Equations of The Second Kind fault in plate group string.When the output voltage of the photovoltaic substrate group string detected is normal, in order to enter
One step gets rid of the fault hidden, and can detect short circuit current further, by relatively described short circuit current with pre-
If the size of current threshold judges that photovoltaic substrate group string is the most normal, if described short circuit current is more than presetting electricity
Stream threshold value then photovoltaic substrate group string is normal, if described short circuit current is less than predetermined current threshold, photovoltaic substrate
There is Equations of The Second Kind fault in group string, can be according to the reclamation activities of Equations of The Second Kind fault, to described photovoltaic substrate group string
Carry out repairing to fix a breakdown.
Exemplary, when determining that Equations of The Second Kind fault occurs in described photovoltaic substrate group string, photovoltaic base described in short circuit
The outfan of plate group string, by remotely control display end detect the photovoltaic substrate in described photovoltaic substrate group string it
Between the temperature of joint, to find fault joint.When Equations of The Second Kind fault, i.e. photovoltaic occurs in photovoltaic substrate group string
When junction contacts between the photovoltaic substrate of substrate in batch string is bad, it is a contact resistance that described joint becomes,
When a current flows through, contact resistance can generate heat and cause temperature to raise, thus by remotely controlling display end
Temperature-detecting device can detect the temperature of joint, thus judges fault joint, it is simple to testing staff couple
Described fault joint is repaired.
Exemplary, when determining that Equations of The Second Kind fault occurs in described photovoltaic substrate group string, at photovoltaic described in short circuit
After the outfan of substrate in batch string, detected in described photovoltaic substrate group string by described long-range control display end
Also include before the temperature of the joint between photovoltaic substrate:
The described Function detection end increase short circuit to photovoltaic substrate group string is remotely controlled according to remotely controlling display end
The patrol frequency of electric current.
When under the existing patrol frequency to the short circuit current of photovoltaic substrate group string, by repeatedly short circuit photovoltaic
The outfan of substrate in batch string, it is impossible to when making the temperature of fault joint raise, can be according to remotely controlling display end
Instruction increase described patrol frequency, by repeatedly quick short circuit, the caloric value of fault joint can be made to increase
Greatly, it is simple to find fault joint.
Fig. 5 is the flow chart of the fault detection method of a kind of photovoltaic substrate group string that the embodiment of the present invention provides,
As it is shown in figure 5, PV represents photovoltaic substrate group string, Vpv represents photovoltaic substrate group string output voltage, and V1 represents
First predetermined voltage threshold, V2 represents the second predetermined voltage threshold, and Ipv represents the short circuit of photovoltaic substrate group string
Electric current, Is represents predetermined current threshold.
As it is shown in figure 5, detect the output voltage of each photovoltaic substrate group string PV first with Function detection end
Vpv, classifies according to the size of output voltage Vpv, when Vpv < during V1, determines that photovoltaic substrate group string goes out
Existing first kind fault；As V1≤Vpv≤V2, determine that Equations of The Second Kind fault occurs in photovoltaic substrate group string；When
During Vpv > V2, determine that the 3rd class fault occurs in photovoltaic substrate group string.For each class fault, take corresponding
Measure is fixed a breakdown.
When first kind fault occurs in photovoltaic substrate group string, show that photovoltaic substrate group string joint is opened a way, i.e. photovoltaic
Joint open circuit between photovoltaic substrate in substrate in batch string, at this moment can be observed connecing of open circuit by testing staff
Head, therefore can find the joint of open circuit in the way of taking hand inspection photovoltaic substrate group string joint, and fastening should
Joint, the problem solving open circuit, the output voltage Vpv of this group string is being detected by Function detection end, if
Output voltage carries out checking and getting rid of this still less than the first predetermined voltage threshold, the then mode continuing hand inspection
Fault, if output voltage is not less than the first predetermined voltage threshold, then judge output voltage whether be more than or
Person is equal to the second predetermined voltage threshold, if output voltage is more than or equal to the second predetermined voltage threshold, then
The first kind fault of this photovoltaic substrate group string can be got rid of, determine that the 3rd class event occurs in this photovoltaic substrate group string
Barrier, detects according to the detection method of the 3rd class fault.
When Equations of The Second Kind fault occurs in photovoltaic substrate group string, show photovoltaic substrate group string joint loose contact, i.e.
The junction contacts between photovoltaic substrate in photovoltaic substrate group string is bad, at this moment can be according to remotely controlling display
The short circuit current of this photovoltaic substrate group string is patrolled and examined by the instruction of end, then carries out trouble shoot and get rid of, this
Time can be by hand inspection group string joint and utilize the failure detector of photovoltaic substrate group string to check this photovoltaic
The mode that the temperature of the joint of substrate in batch string combines carries out trouble shoot, after finding corresponding fault joint,
By this fault joint being overhauled or changing to fix a breakdown.Then judge that this photovoltaic substrate group string is defeated
Go out voltage and be the most more than predetermined current threshold more than or equal to the second predetermined voltage threshold and short circuit current,
If the condition of being unsatisfactory for, then increase the short circuit to this photovoltaic substrate group string according to the instruction remotely controlling display end
The patrol frequency of electric current, use increase after patrol frequency the short circuit current of this photovoltaic substrate group string is continued into
Row is patrolled and examined；If having met condition, then show that the fault of this photovoltaic substrate group string is got rid of.
When the 3rd class fault occurs in photovoltaic substrate group string, detect the short circuit electricity of this photovoltaic substrate group string further
Stream, if described short circuit current is more than predetermined current threshold, then shows that this photovoltaic substrate group string is normal, if
Described short circuit current is not more than predetermined current threshold, it is determined that Equations of The Second Kind fault occurs in this photovoltaic substrate group string,
The fault detecting to get rid of this photovoltaic substrate group string is carried out according to the detection method of Equations of The Second Kind fault.
First the present embodiment by detecting the output voltage of photovoltaic substrate group string, according to the size pair of output voltage
Classifying the fault type of this photovoltaic substrate group string, be divided three classes, the 3rd class fault includes photovoltaic base
The normal situation of plate group string, takes appropriate measures according to fault type and detects and get rid of this fault, improve
Detection efficiency.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.Those skilled in the art
It will be appreciated that the invention is not restricted to specific embodiment described here, can enter for a person skilled in the art
Row various obvious changes, readjust and substitute without departing from protection scope of the present invention.Therefore, though
So by above example, the present invention is described in further detail, but the present invention be not limited only to
Upper embodiment, without departing from the inventive concept, it is also possible to include other Equivalent embodiments more,
And the scope of the present invention is determined by scope of the appended claims.
Claims (4)
1. the fault detection method of a photovoltaic substrate group string, it is characterised in that described method includes:
Examine with the display end remote control function test side that remotely controls of the failure detector of photovoltaic substrate in batch string
The output voltage of light-metering volt substrate in batch string；
If described long-range control display end shows the described photovoltaic substrate group string that described Function detection end detects
Output voltage less than the first predetermined voltage threshold, it is determined that described photovoltaic substrate group string the first kind occurs therefore
Barrier, wherein, described first kind fault shows as photovoltaic substrate group string joint open circuit；
If described long-range control display end shows the described photovoltaic substrate group string that described Function detection end detects
Output voltage between described first predetermined voltage threshold and the second predetermined voltage threshold, it is determined that described
There is Equations of The Second Kind fault in photovoltaic substrate group string, and wherein, described Equations of The Second Kind fault shows as photovoltaic substrate group concatenation
Head loose contact.
Method the most according to claim 1, it is characterised in that when described long-range control display end shows
Show that the output voltage of the described photovoltaic substrate group string that described Function detection end detects is more than the second predeterminated voltage threshold
During value, also include:
Remotely control described Function detection end by described long-range control display end and detect described photovoltaic substrate group string
Short circuit current, if described long-range control display end shows the described short circuit that described Function detection end detects
Electric current is more than predetermined current threshold, it is determined that described photovoltaic substrate group string is normal, otherwise determines described photovoltaic base
There is Equations of The Second Kind fault in plate group string.
Method the most according to claim 1, it is characterised in that when determining described photovoltaic substrate group string
When there is Equations of The Second Kind fault, described in short circuit, the outfan of photovoltaic substrate group string, is shown by described long-range control
End detects the temperature of the joint between the photovoltaic substrate in described photovoltaic substrate group string, to find fault joint.
Method the most according to claim 3, it is characterised in that when determining described photovoltaic substrate group string
When Equations of The Second Kind fault occurs, after the outfan of photovoltaic substrate group string described in short circuit, by described long-range control
Before display end processed detects the temperature of the joint between the photovoltaic substrate in described photovoltaic substrate group string, also wrap
Include:
Remotely control described Function detection end by described long-range control display end to increase described photovoltaic substrate group
The patrol frequency of the short circuit current of string.
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| CN201410025956.7A CN103780204B (en) | 2014-01-20 | 2014-01-20 | The fault detection method of photovoltaic substrate group string |
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| CN201410025956.7A CN103780204B (en) | 2014-01-20 | 2014-01-20 | The fault detection method of photovoltaic substrate group string |
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| CN109901057A (en) * | 2019-04-15 | 2019-06-18 | 苏州浪潮智能科技有限公司 | A kind of Fault Locating Method, device, equipment and storage medium |
| CN110989683A (en) * | 2019-12-31 | 2020-04-10 | 深圳市贝贝特科技实业有限公司 | Executing method and executing system based on unmanned aerial vehicle detection |
| CN113655325B (en) * | 2021-09-24 | 2025-03-14 | 珠海格力电器股份有限公司 | Fault detection circuit, method, DC power supply system and DC appliance |
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