CN103780204A - Fault detection device and method for photovoltaic substrate set string - Google Patents
Fault detection device and method for photovoltaic substrate set string Download PDFInfo
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- CN103780204A CN103780204A CN201410025956.7A CN201410025956A CN103780204A CN 103780204 A CN103780204 A CN 103780204A CN 201410025956 A CN201410025956 A CN 201410025956A CN 103780204 A CN103780204 A CN 103780204A
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Abstract
The invention discloses a fault detection device and method for a photovoltaic substrate set string. The device comprises a function detection terminal and a remote control display terminal. The remote control display terminal is used for generating a first remote control instruction. The function detection terminal is used for detecting the output voltage of the photovoltaic substrate set string under the control of the first remote control instruction generated by the remote control display terminal, and sending the detected output voltage to the remote control display terminal. The remote control display terminal is further used for displaying the output voltage sent by the function detection terminal. The detection result can be directly displayed to detection personnel through the remote control display terminal, and therefore the detection personnel can obtain the output voltage of the photovoltaic substrate set string in the connection position of photovoltaic substrates through the remote control display terminal, and do not need to return to the output position of the photovoltaic substrate set string to obtain the output voltage of the photovoltaic substrate set string, detection efficiency is improved, and the problem that in the prior art, the detection efficiency is low is solved.
Description
Technical field
The embodiment of the present invention relates to photovoltaic power generation technology, relates in particular to a kind of failure detector and method of photovoltaic substrate group string.
Background technology
In the type photovoltaic generating system of power station, use a large amount of photovoltaic substrates that solar energy is converted to electric energy.Because voltage and the power of single substrate are less, the composition group string that conventionally multiple photovoltaic substrates is together in series, to increase total output voltage, and then after multiple groups of strings being confluxed by collector-shoe gear, then be input to photovoltaic DC-to-AC converter.
According to the difference of the difference of single photovoltaic substrate open circuit voltage and photovoltaic DC-to-AC converter input voltage range, the quantity difference of the photovoltaic substrate that each group of string connected, is not generally 20 to 30 not etc.The output lead of these photovoltaic substrates connects by special joint conventionally, and because the number of substrates involving is numerous, these joints unavoidably can be because loose contact appears in a variety of causes in the process of installing, the even situation of open circuit.Therefore before substrate is connected to collector-shoe gear, conventionally can under the condition that has sunshine, removes to detect the output voltage of each group of string by universal instrument, and then judge the connection state of photovoltaic substrate group string.
If certain group string output voltage a lot of or no-output voltage on the low side detected, explanation group is serially connected with problem.In prior art, conventionally adopt two kinds of methods, one is to check that this group goes here and there each joint connection state to suspecting that problematic joint detects maintenance, and then the group of running back whether go here and there output detection voltage correct.The problem of this method is likely to need testing staff to carry out fallback just can deal with problems several times, loses time.Another kind method is to have two testing staff, and a personal responsibility detects output voltage with universal instrument, and another person removes to check joint, and two people carry out communication by communication device and confirm whether output is normal.The problem of this method is waste of manpower, also may not cause problem to solve in time because of information communication comprehensively.In addition, being generally difficult to detect some contacts by the method for test output voltage has problem, but contact resistance is not again king-sized fault.In general, these method detection efficiencies are lower.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of failure detector and method of photovoltaic substrate group string, to improve detection efficiency.
First aspect, the embodiment of the present invention provides a kind of failure detector of photovoltaic substrate group string, and described device comprises Function detection end and Long-distance Control display end;
Described Long-distance Control display end is used for generating the first remote control commands;
Under the control of described Function detection end for the first remote control commands in described Long-distance Control display end generation, detect the output voltage of photovoltaic substrate group string, and the output voltage detecting is sent to described Long-distance Control display end;
Described Long-distance Control display end is the output voltage for showing that described Function detection end sends also.
Second aspect, the embodiment of the present invention also provides a kind of fault detection method of photovoltaic substrate group string, and described method comprises:
Detect the output voltage of photovoltaic substrate group string with the Long-distance Control display end remote control function test side of the failure detector of photovoltaic substrate in batch string;
If described Long-distance Control display end shows the output voltage of the described photovoltaic substrate group string that described Function detection end detects and is less than the first predetermined voltage threshold, determine that first kind fault appears in described photovoltaic substrate group string, wherein, described first kind fault shows as photovoltaic substrate group string joint open circuit;
If described Long-distance Control display end shows that the output voltage of the described photovoltaic substrate group string that described Function detection end detects is between described the first predetermined voltage threshold and described the second predetermined voltage threshold, determine that Equations of The Second Kind fault appears in described photovoltaic substrate group string, wherein, described Equations of The Second Kind fault shows as the loose contact of photovoltaic substrate group string joint.
Failure detector and the method for the photovoltaic substrate group string that the embodiment of the present invention provides, generate the first control command by Long-distance Control display end, Function detection end detects the output voltage of photovoltaic substrate group string under the control of the first control command, and send to Long-distance Control display end to show testing result, make testing staff can obtain at the link position place of photovoltaic substrate the output voltage of photovoltaic substrate group string by Long-distance Control display end, and the outgoing position that need not turn back to photovoltaic substrate group string obtains the output voltage of photovoltaic substrate group string, improve detection efficiency, solve the low problem of detection efficiency in prior art.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the failure detector of a kind of photovoltaic substrate group string of providing of the embodiment of the present invention;
Fig. 2 is a kind of schematic diagram of the Function detection end in the failure detector of the photovoltaic substrate group string that provides of the embodiment of the present invention;
Fig. 3 is a kind of schematic diagram of the Long-distance Control display end in the failure detector of the photovoltaic substrate group string that provides of the embodiment of the present invention;
Fig. 4 is the flow chart of the fault detection method of a kind of photovoltaic substrate group string of providing of the embodiment of the present invention;
Fig. 5 is the flow chart of the fault detection method of a kind of photovoltaic substrate group string of providing of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, in accompanying drawing, only show part related to the present invention but not full content.
Fig. 1 is the schematic diagram of the failure detector of a kind of photovoltaic substrate group string of providing of the embodiment of the present invention, and the failure detector of the photovoltaic substrate group string that the present embodiment provides can be used for detecting the fault in photovoltaic substrate group string.The failure detector of the photovoltaic substrate group string that as shown in Figure 1, the present embodiment provides comprises Function detection end 110 and Long-distance Control display end 120.Wherein, described Function detection end 110 connects with photovoltaic substrate group series winding, described Long-distance Control display end 120 can be carried by testing staff, Function detection end 110 and Long-distance Control display end 120 can be realized and the communicating by letter of the other side by communication modes, Function detection end 110 and 120 wireless connections of Long-distance Control display end in Fig. 1.Utilize the failure detector of the photovoltaic substrate group string that the present embodiment provides to detect a photovoltaic substrate group string, also can detect multiple photovoltaic substrate group strings.
Described Long-distance Control display end 120 is for generating the first remote control commands.Described the first remote control commands is the instruction that control Function detection end 110 detects the output voltage of photovoltaic substrate group string.Long-distance Control display end 120 can send to Function detection end by wireless telecommunications or wire communication mode by the first remote control commands generating.
Under the control of described Function detection end 110 for the first remote control commands of generating at described Long-distance Control display end 120, detect the output voltage of photovoltaic substrate group string, and the output voltage detecting is sent to described Long-distance Control display end 120.Function detection end is by the first remote control commands of wireless communication mode or limited communication modes receiving remote control display end 120, and according to the output voltage of the first remote control commands detection photovoltaic substrate group string, and by the output voltage detecting being sent to described Long-distance Control display end 120.
Described Long-distance Control display end 120 is the output voltage for showing that described Function detection end 110 sends also.For example, Long-distance Control display end 120 can be mutual by wireless communication mode or wire communication mode and Function detection end 110 (Fig. 1 provide be wireless connections modes), the output voltage of the photovoltaic substrate group string that send receiving function test side 110, and show.The output voltage sending by Long-distance Control display end 120 Presentation Function test sides 110, can allow testing staff recognize the output voltage of photovoltaic substrate group string, the preliminary fault type that judges photovoltaic substrate group string, thereby the fault type for each photovoltaic substrate group string is made further detection, to fix a breakdown.
The present embodiment generates the first control command by Long-distance Control display end, Function detection end detects the output voltage of photovoltaic substrate group string under the control of the first control command, and send to Long-distance Control display end to show testing result, make testing staff can obtain at the link position place of photovoltaic substrate the output voltage of photovoltaic substrate group string by Long-distance Control display end, and the outgoing position that need not turn back to photovoltaic substrate group string obtains the output voltage of photovoltaic substrate group string, improve detection efficiency, solved the low problem of detection efficiency in prior art.
When the output voltage that the Function detection end showing when Long-distance Control display end sends is greater than the second predetermined threshold value, still may there is fault in photovoltaic substrate group string, in order fault further to be detected and to get rid of this fault, need to further detect.Exemplary, described Long-distance Control display end also can be used for generating the second remote control commands, and described Function detection end detects the short circuit current of described photovoltaic substrate group string under the control of the second remote control commands.By detecting short circuit current, in the situation that having joint loose contact, short circuit current can diminish, thereby judges joint between the photovoltaic substrate in photovoltaic substrate group string and exist the problem of loose contact according to short circuit current, repairs this problem by hand inspection or other modes.
The output voltage that sends of Function detection end showing when Long-distance Control display end is between the first predetermined threshold value and the second predetermined threshold value time, there is the fault of loose contact in the joint between the photovoltaic substrate in photovoltaic substrate group string, in order further to find fault joint, need further to detect, can find fault joint by the temperature that detects the joint between the photovoltaic substrate in photovoltaic substrate group string.Exemplary, described Long-distance Control display end also can be used for detecting the temperature of the joint between photovoltaic substrate in described photovoltaic substrate group string.Can detect the temperature of the joint between the photovoltaic substrate in photovoltaic substrate group string by the temperature detecting function of Long-distance Control display end.While there is the faults such as loose contact in the joint between the photovoltaic substrate in photovoltaic substrate group string, can be by quick repeatedly positive pole and the negative pole of the output of short circuit photovoltaic substrate group string, thereby can strengthen the caloric value of out of order joint, can detect the temperature of each joint by temperature detecting function, thereby judge out of order joint, be convenient to testing staff and out of order joint is overhauled or changed fix a breakdown.
The failure detector of the photovoltaic substrate group string that the embodiment of the present invention provides can carry out fault detect to a photovoltaic substrate group string, also can carry out fault detect to multiple photovoltaic substrate group strings.
In the time that the failure detector of photovoltaic substrate group string carries out fault detect to multiple photovoltaic substrate group strings, Function detection end need to have the function of the output voltage that detects multiple photovoltaic substrate group strings.
Fig. 2 is a kind of schematic diagram of the Function detection end in the failure detector of the photovoltaic substrate group string that provides of the embodiment of the present invention, as shown in Figure 2, described Function detection end 110 comprises: the first control module 111, a n Function detection module 112, wireless communication module 113 and the first power supply 114.Wherein, each Function detection module in n Function detection module connects the photovoltaic substrate group string PV(PV1 that needs detect, PV2, any one in PVn, wherein, n refers to the quantity of the photovoltaic substrate group string being connected with Function detection module), can detect n photovoltaic substrate group string, for measuring output voltage and the short circuit current of corresponding photovoltaic substrate group string simultaneously; The first wireless communication module 113 is for the instruction of receiving remote control display end 120 and be transferred to the first control system, and the testing result that the first control module control Function detection module 112 is detected sends to Long-distance Control display end 120; The first power supply 114 is used to the first control module 111 to power; The first control module 111 is for detect output voltage or the short circuit current of photovoltaic substrate group string according to the instruction control Function detection module 112 of Long-distance Control display end 120, and testing result is transferred to Long-distance Control display end 120 by the first wireless communication module 113.
Fig. 3 is a kind of schematic diagram of the Long-distance Control display end in the failure detector of the photovoltaic substrate group string that provides of the embodiment of the present invention, as shown in Figure 3, described Long-distance Control display end 120 comprises: the second control module 121, temperature detecting module 122, the second wireless communication module 123, display module 124, function button 125 and second source 126.
The temperature detecting module 122 of Long-distance Control display end 120 is for detection of the temperature of the joint between the photovoltaic substrate in photovoltaic substrate group string, temperature by the described joint that detects judges which joint exists the faults such as loose contact, thereby find fault joint, be convenient to safeguard.The second wireless communication module 123 is for realizing and the radio communication function of described Function detection end 110.The testing result that display module 124 sends for Presentation Function test side, and the testing result of Long-distance Control display end 120 (as temperature); Function button 125 is for realizing mutual with testing staff.Second source 126 is used to the second control module power supply.The second control module 121 is for generating control command, detect the output voltage of photovoltaic substrate group string or the size of short circuit current and the patrol frequency to short circuit current to control Function detection end 110, also carry out the demonstration of testing result for controlling display module, and receive the testing result from Function detection end 110 by the second wireless communication module 123.
When the failure detector of the photovoltaic substrate group string providing when the embodiment of the present invention comprises the Long-distance Control display end shown in the Function detection end shown in Fig. 2 and Fig. 3, the photovoltaic substrate group string being detected as required by the second control module of Long-distance Control display end 120 is (as PV1, PV2, in PVn one) generate the instruction that detects which photovoltaic substrate group string No. ID, and send to Function detection end 110 by the second communication module 123, Function detection end 110 is received described instruction and is transferred to the first control module 111 by the first communication module 113, the first control module 111 is used unified No. ID to photovoltaic substrate group string with Long-distance Control display end 120, the Function detection module 112 being connected according to the described instruction startup photovoltaic substrate group string corresponding with this instruction detects described photovoltaic substrate group string is detected.
Fig. 4 is the flow chart of the fault detection method of a kind of photovoltaic substrate group string of providing of the embodiment of the present invention, and the failure detector of the photovoltaic substrate group string that the fault detection method of the photovoltaic substrate group string that the present embodiment provides can be provided by above-described embodiment is realized.As shown in Figure 4, the fault detection method of photovoltaic substrate group string specifically comprises the steps:
The Long-distance Control display end control Function detection end of the checkout gear of the fault by photovoltaic substrate group string detects the output voltage of photovoltaic substrate group string.
Wherein, described first kind fault shows as photovoltaic substrate group string joint open circuit.
Wherein, described Equations of The Second Kind fault shows as the loose contact of photovoltaic substrate group string joint.The output voltage of the definite photovoltaic substrate group string of Equations of The Second Kind fault, between described the first predetermined voltage threshold and described the second predetermined voltage threshold, comprises described the first predetermined voltage threshold and described the second predetermined voltage threshold.
The present embodiment, by detecting the output voltage of photovoltaic substrate group string, judges the fault type of photovoltaic substrate group string according to the size of output voltage, be convenient to testing staff and take appropriate measures and fix a breakdown according to fault type, has improved detection efficiency.
Exemplary, in the time that described Long-distance Control display end shows that the output voltage of the described photovoltaic substrate group string that described Function detection end detects is greater than the second predetermined voltage threshold, also comprise:
Detect the short circuit current of described photovoltaic substrate group string by Function detection end described in described Long-distance Control display end Long-distance Control, if described Long-distance Control display end shows the described short circuit current that described Function detection end detects and is greater than predetermined current threshold value, determine that described photovoltaic substrate group string is normal, otherwise determine that Equations of The Second Kind fault appears in described photovoltaic substrate group string.In the time that the output voltage of the photovoltaic substrate group string detecting is normal, in order further to get rid of hiding fault, can further detect short circuit current, judge that by the size of more described short circuit current and predetermined current threshold value whether photovoltaic substrate group string is normal, if described short circuit current is greater than predetermined current threshold value, photovoltaic substrate group string is normal, if described short circuit current is less than predetermined current threshold value, there is Equations of The Second Kind fault in photovoltaic substrate group string, can, according to the reclamation activities of Equations of The Second Kind fault, described photovoltaic substrate group string be repaired to fix a breakdown.
Exemplary, in the time there is Equations of The Second Kind fault in definite described photovoltaic substrate group string, the output of photovoltaic substrate group string described in short circuit, detects the temperature of the joint between the photovoltaic substrate in described photovoltaic substrate group string, to find fault joint by Long-distance Control display end.When Equations of The Second Kind fault appears in photovoltaic substrate group string, while being the joint loose contact between the photovoltaic substrate of photovoltaic substrate group string, described joint just becomes a contact resistance, in the time having electric current to flow through, contact resistance can generate heat and cause temperature to raise, thereby the temperature of joint can be detected by the temperature-detecting device of Long-distance Control display end, thereby judge fault joint, be convenient to testing staff described fault joint is repaired.
Exemplary, in the time there is Equations of The Second Kind fault in definite described photovoltaic substrate group string, after the output of photovoltaic substrate group string described in short circuit, the temperature that detects the joint between the photovoltaic substrate in described photovoltaic substrate group string by described Long-distance Control display end also comprises before:
Increase the patrol frequency of the short circuit current to photovoltaic substrate group string according to Function detection end described in Long-distance Control display end Long-distance Control.
When under the patrol frequency at the existing short circuit current to photovoltaic substrate group string, by the output of short circuit photovoltaic substrate group string repeatedly, can not make the temperature rising of fault joint time, can increase described patrol frequency according to the instruction of Long-distance Control display end, by quick short circuit repeatedly, can make the caloric value of fault joint increase, be convenient to find fault joint.
Fig. 5 is the flow chart of the fault detection method of a kind of photovoltaic substrate group string of providing of the embodiment of the present invention, as shown in Figure 5, PV represents photovoltaic substrate group string, Vpv represents photovoltaic substrate group string output voltage, V1 represents the first predetermined voltage threshold, V2 represents the second predetermined voltage threshold, and Ipv represents the short circuit current of photovoltaic substrate group string, and Is represents predetermined current threshold value.
As shown in Figure 5, first utilize Function detection end to detect the output voltage V pv of each photovoltaic substrate group string PV, classify according to the size of output voltage V pv, in the time of Vpv<V1, determine that first kind fault appears in photovoltaic substrate group string; In the time of V1≤Vpv≤V2, determine that Equations of The Second Kind fault appears in photovoltaic substrate group string; In the time of Vpv>V2, determine that the 3rd class fault appears in photovoltaic substrate group string.For each class fault, take appropriate measures and fix a breakdown.
In the time there is first kind fault in photovoltaic substrate group string, show photovoltaic substrate group string joint open circuit, it is the joint open circuit between the photovoltaic substrate in photovoltaic substrate group string, at this moment can be observed by testing staff the joint of open circuit, therefore can take the mode of hand inspection photovoltaic substrate group string joint to find the joint of open circuit, fastening this joint, solve the problem of open circuit, at the output voltage V pv that detects this group string by Function detection end, if output voltage is still less than the first predetermined voltage threshold, the mode that continues hand inspection checks and gets rid of this fault, if output voltage has been not less than the first predetermined voltage threshold, judge whether output voltage is greater than or equal to the second predetermined voltage threshold, if output voltage is greater than or equal to the second predetermined voltage threshold, can get rid of the first kind fault of this photovoltaic substrate group string, determine that the 3rd class fault appears in this photovoltaic substrate group string, detection method according to the 3rd class fault detects.
In the time there is Equations of The Second Kind fault in photovoltaic substrate group string, show the loose contact of photovoltaic substrate group string joint, it is the joint loose contact between the photovoltaic substrate in photovoltaic substrate group string, at this moment can patrol and examine the short circuit current of this photovoltaic substrate group string according to the instruction of Long-distance Control display end, carry out again trouble shoot and get rid of, at this moment can and utilize the failure detector of photovoltaic substrate group string to check that the mode that the temperature of the joint of this photovoltaic substrate group string combines carries out trouble shoot by hand inspection group string joint, find after corresponding fault joint, by being overhauled or changed, this fault joint fixes a breakdown.Then judge whether this photovoltaic substrate group string output voltage has been greater than or equal to the second predetermined voltage threshold and short circuit current is greater than predetermined current threshold value, if do not satisfied condition, increase the patrol frequency of the short circuit current to this photovoltaic substrate group string according to the instruction of Long-distance Control display end, adopt the patrol frequency after increasing to proceed to patrol and examine to the short circuit current of this photovoltaic substrate group string; If satisfied condition, show that the fault of this photovoltaic substrate group string is got rid of.
In the time there is the 3rd class fault in photovoltaic substrate group string, further detect the short circuit current of this photovoltaic substrate group string, if described short circuit current is greater than predetermined current threshold value, show that this photovoltaic substrate group string is normal, if described short circuit current is not more than predetermined current threshold value, determine that Equations of The Second Kind fault appears in this photovoltaic substrate group string, detects to get rid of the fault of this photovoltaic substrate group string 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 of output voltage to the fault type of this photovoltaic substrate group string is classified, be divided three classes, the 3rd class fault comprises the normal situation of photovoltaic substrate group string, take appropriate measures and detect and get rid of this fault according to fault type, improved detection efficiency.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious variations, readjust and substitute and can not depart from protection scope of the present invention.Therefore, although the present invention is described in further detail by above embodiment, the present invention is not limited only to above embodiment, in the situation that not departing from the present invention's design, can also comprise more other equivalent embodiment, and scope of the present invention is determined by appended claim scope.
Claims (8)
1. a failure detector for photovoltaic substrate group string, is characterized in that, described device comprises Function detection end and Long-distance Control display end;
Described Long-distance Control display end is used for generating the first remote control commands;
Under the control of described Function detection end for the first remote control commands in described Long-distance Control display end generation, detect the output voltage of photovoltaic substrate group string, and the output voltage detecting is sent to described Long-distance Control display end;
Described Long-distance Control display end is the output voltage for showing that described Function detection end sends also.
2. device according to claim 1, is characterized in that, described Long-distance Control display end is also for generating the second remote control commands, and described Function detection end detects the short circuit current of described photovoltaic substrate group string under the control of the second remote control commands.
3. device according to claim 1, is characterized in that, described Long-distance Control display end is also for detection of the temperature of the joint between photovoltaic substrate in described photovoltaic substrate group string.
4. according to the device described in claim 1-3 any one, it is characterized in that, described Function detection end comprises: the first control module, Function detection module, the first wireless communication module and the first power supply; The first control module is used for detecting according to the instruction control Function detection module of Long-distance Control display end output voltage or the short circuit current of photovoltaic substrate group string, and testing result is transferred to Long-distance Control display end by the first wireless communication module; Function detection module and photovoltaic substrate group series winding connect, for detection of output voltage and the short circuit current of corresponding photovoltaic substrate group string; The first wireless communication module is used for the instruction of receiving remote control display end and is transferred to the first control system, and the testing result that the first control module control Function detection module is detected sends to Long-distance Control display end; The first power supply is used to the first control module power supply; The first control module is used for detecting according to the instruction control Function detection module of Long-distance Control display end output voltage or the short circuit current of photovoltaic substrate group string, and testing result is transferred to Long-distance Control display end by the first wireless communication module;
Described Long-distance Control display end comprises: the second control module, temperature detecting module, the second wireless communication module, display module, function button and second source; Temperature detecting module is for detection of the temperature of the joint between the photovoltaic substrate in photovoltaic substrate group string; The second wireless communication module is for realizing and the radio communication function of described Function detection end; The testing result that display module sends for Presentation Function test side, and the testing result of Long-distance Control display end; Function button is for realizing mutual with testing staff; Second source is used to the second control module power supply; The second control module is used for generating control command, detect the output voltage of photovoltaic substrate group string or the size of short circuit current and the patrol frequency to short circuit current to control Function detection end, also carry out the demonstration of testing result for controlling display module, and receive the testing result from Function detection end by the second wireless communication module.
5. a fault detection method for photovoltaic substrate group string, is characterized in that, described method comprises:
Detect the output voltage of photovoltaic substrate group string with the Long-distance Control display end remote control function test side of the failure detector of photovoltaic substrate in batch string;
If described Long-distance Control display end shows the output voltage of the described photovoltaic substrate group string that described Function detection end detects and is less than the first predetermined voltage threshold, determine that first kind fault appears in described photovoltaic substrate group string, wherein, described first kind fault shows as photovoltaic substrate group string joint open circuit;
If described Long-distance Control display end shows that the output voltage of the described photovoltaic substrate group string that described Function detection end detects is between described the first predetermined voltage threshold and described the second predetermined voltage threshold, determine that Equations of The Second Kind fault appears in described photovoltaic substrate group string, wherein, described Equations of The Second Kind fault shows as the loose contact of photovoltaic substrate group string joint.
6. method according to claim 5, is characterized in that, in the time that described Long-distance Control display end shows that the output voltage of the described photovoltaic substrate group string that described Function detection end detects is greater than the second predetermined voltage threshold, also comprises:
Detect the short circuit current of described photovoltaic substrate group string by Function detection end described in described Long-distance Control display end Long-distance Control, if described Long-distance Control display end shows the described short circuit current that described Function detection end detects and is greater than predetermined current threshold value, determine that described photovoltaic substrate group string is normal, otherwise determine that Equations of The Second Kind fault appears in described photovoltaic substrate group string.
7. method according to claim 5, it is characterized in that, in the time there is Equations of The Second Kind fault in definite described photovoltaic substrate group string, the output of photovoltaic substrate group string described in short circuit, detect the temperature of the joint between the photovoltaic substrate in described photovoltaic substrate group string by described Long-distance Control display end, to find fault joint.
8. method according to claim 7, it is characterized in that, in the time there is Equations of The Second Kind fault in definite described photovoltaic substrate group string, after the output of photovoltaic substrate group string described in short circuit, detect the temperature of the joint between the photovoltaic substrate in described photovoltaic substrate group string by described Long-distance Control display end before, also comprise:
Increase the patrol frequency of the short circuit current to described photovoltaic substrate group string by Function detection end described in described Long-distance Control display end Long-distance Control.
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| 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 |
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