CN106771957B - Photovoltaic power generation input circuit fault detection method, apparatus and system - Google Patents

Photovoltaic power generation input circuit fault detection method, apparatus and system Download PDF

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CN106771957B
CN106771957B CN201510860136.4A CN201510860136A CN106771957B CN 106771957 B CN106771957 B CN 106771957B CN 201510860136 A CN201510860136 A CN 201510860136A CN 106771957 B CN106771957 B CN 106771957B
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collector
shoe gear
output current
current value
level
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CN106771957A (en
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张传升
郭凯
宋斌斌
李新连
左宁
于涛
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Shenhua (Beijing) photovoltaic technology research and Development Co., Ltd.
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Shenhua (beijing) Photovoltaic Technology Research And Development Co Ltd
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Abstract

The invention discloses a kind of photovoltaic power generation input circuit fault detection methods, apparatus and system.Wherein, this method comprises: acquiring the output current value of first order collector-shoe gear by the current detection circuit that first order collector-shoe gear output end is arranged in；In the output electric current of each first order collector-shoe gear of second level collector-shoe gear access, output current maxima is found out；Calculate the difference of the output current value of output current maxima and first order collector-shoe gear；In the case where the ratio of difference and output current maxima is greater than or equal to the inverse of the number of the input branch of first order collector-shoe gear access, determine that first order collector-shoe gear has input branch circuit break.Due to acquiring the output current value of first order collector-shoe gear by the way that current detection circuit is arranged in first order collector-shoe gear output end, the first order collector-shoe gear that can be detected out input branch circuit break, finds the purpose of photovoltaic power generation input circuit trouble location to realize through less detection circuit.

Description

Photovoltaic power generation input circuit fault detection method, apparatus and system
Technical field
The present invention relates to photovoltaic arts, and in particular, to a kind of photovoltaic power generation input circuit fault detection method, device and System.
Background technique
Large-sized photovoltaic power station is made of photovoltaic module.The output electric current of photovoltaic module needs to collect by collector-shoe gear, Then collect step by step by upper level collector-shoe gear again, be then input to inverter.
In order to ensure the safe operation of photovoltaic plant, some the relevant technologies are using the monitoring each fuse state of collector-shoe gear Mode find out the trouble location of photovoltaic power generation input circuit.
But this mode is needed using a large amount of detection circuit, higher cost.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of photovoltaic power generation input circuit fault detection method, device and System is to find the purpose of photovoltaic power generation input circuit trouble location by less detection circuit.
In the first aspect of the embodiment of the present invention, the present invention provides a kind of photovoltaic power generation input circuit fault detection side Method.Wherein, the photovoltaic power generation input circuit is used to access photovoltaic group in the classification bus structure using bus structure is classified The collector-shoe gear that part exports electric current is first order collector-shoe gear, the remittance of the output electric current for accessing the first order collector-shoe gear Stream device is second level collector-shoe gear, and each first order collector-shoe gear of same second level collector-shoe gear access is respectively connected to defeated The number for entering branch is identical and photovoltaic module design parameter is identical.The described method includes: being converged by setting in the first order The current detection circuit of device output end acquires the output current value of the first order collector-shoe gear, converges in any second level and fills It sets in the output electric current of each first order collector-shoe gear of access, finds out output current maxima, calculate the output electric current The difference of the output current value of maximum value and any first order collector-shoe gear of any second level collector-shoe gear access, in institute The ratio for stating difference and the output current maxima is greater than or equal to the input branch that any first order collector-shoe gear accesses In the case where the inverse of the number on road, determine that any first order collector-shoe gear has input branch circuit break.
Optionally, the method also includes: according to the output current value of the collected first order collector-shoe gear and The classification bus structure, counts the output current value of any collector-shoe gear, judges the output electricity of any collector-shoe gear Whether flow valuve is equal to zero, in the null situation of output current value of any collector-shoe gear, determines any confluence The input branch of the high level-one collector-shoe gear of the output open circuit of device or the output electric current for accessing any collector-shoe gear Open circuit.
Optionally, it includes: to converge according to the classification that whether the output current value for judging any collector-shoe gear, which is equal to zero, Flow structure, from highest collector-shoe gear to first order collector-shoe gear, judge step by step each collector-shoe gear output current value whether Equal to zero.
Optionally, the method also includes: setting measurement period.It is described defeated in the first order collector-shoe gear by being arranged The output current value that the current detection circuit of outlet acquires the first order collector-shoe gear includes: to lead in each measurement period It crosses and the current detection circuit of the first order collector-shoe gear output end is set acquires and add up the first order collector-shoe gear and exist Output current value in each measurement period obtains accumulative output electricity of the first order collector-shoe gear in each measurement period Flow valuve.The output current value and the classification bus structure according to the collected first order collector-shoe gear, statistics Out the output current value of any collector-shoe gear include: according to the first order collector-shoe gear in each measurement period add up it is defeated Current value and the classification bus structure out count accumulative output electric current of each collector-shoe gear in each measurement period Value.It is described according to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, judge each confluence step by step It includes: according to the classification bus structure, from highest collector-shoe gear to the first order that whether the output current value of device, which is equal to zero, Collector-shoe gear, judges whether accumulative output current value of each collector-shoe gear in each measurement period is equal to zero step by step.
Optionally, the sample frequency in the measurement period was less than 30 seconds.
Optionally, the current detection circuit by the way that the first order collector-shoe gear output end is arranged in acquires described the The output current value of level-one collector-shoe gear includes: the current detection circuit by the way that the first order collector-shoe gear output end is arranged in The first order collector-shoe gear is acquired in the real-time output current value at current detection moment, the first order collector-shoe gear is obtained and exists The real-time output current value at current detection moment.The output current value according to the collected first order collector-shoe gear with And the classification bus structure, the output current value for counting any collector-shoe gear includes: according to the first order collector-shoe gear In the real-time output current value and the classification bus structure at current detection moment, counts each collector-shoe gear and examined currently Survey the real-time output current value at moment.It is described according to the classification bus structure, converge from highest collector-shoe gear to the first order Device, judging whether the output current value of each collector-shoe gear is equal to zero step by step includes: according to the classification bus structure, from most Advanced collector-shoe gear judges each collector-shoe gear in the real-time output electric current at current detection moment step by step to first order collector-shoe gear Whether value is equal to zero.
Optionally, the sequence of the level of collector-shoe gear from high in the end in the classification bus structure are as follows: fourth stage confluence dress It sets, third level collector-shoe gear, second level collector-shoe gear, first order collector-shoe gear.It is described according to the classification bus structure, from most Advanced collector-shoe gear judges whether the output current value of each collector-shoe gear is equal to zero and includes: to first order collector-shoe gear step by step Judge whether the output current value of fourth stage collector-shoe gear is equal to zero, is differed in the output current value of the fourth stage collector-shoe gear In the case where zero, from the third level collector-shoe gear that the fourth stage collector-shoe gear accesses, any one third level is selected to converge Device, judges whether the output current value of any one selected third level collector-shoe gear is equal to zero, in any one described third In the case that the output current value of grade collector-shoe gear is not equal to zero, from the second level that any one described third level collector-shoe gear accesses In collector-shoe gear, any one second level collector-shoe gear is selected, judges the output electricity of any one selected second level collector-shoe gear Whether flow valuve is equal to zero, in the case where the output current value of any one second level collector-shoe gear is not equal to zero, judges institute Whether the output current value for stating each first order collector-shoe gear of any one second level collector-shoe gear access is equal to zero, if described It is whether null there are also output current value is not judged in the second level collector-shoe gear of any one third level collector-shoe gear access Second level collector-shoe gear, from it is described be not judged in the whether null second level collector-shoe gear of output current value reselect appoint One second level collector-shoe gear backs within the output current value of any one selected second level collector-shoe gear of judgement Whether null step, if in the second level collector-shoe gear of any one described third level collector-shoe gear access, there is no not It is judged the whether null second level collector-shoe gear of output current value, is never judged output current value whether null Any one third level collector-shoe gear is reselected in three-level collector-shoe gear, back within the judgement it is selected any one the The whether null step of the output current value of three-level collector-shoe gear.Wherein, described to calculate the output current maxima and institute The difference for stating the output current value of any first order collector-shoe gear of any second level collector-shoe gear access includes: finding out After stating the output current maxima in each first order collector-shoe gear of any one second level collector-shoe gear access, for each Output current value is not equal to zero first order collector-shoe gear, calculates the output current maxima and the targeted first order one by one The difference of the output current value of collector-shoe gear.The ratio in the difference and the output current maxima is greater than or equal to In the case where the inverse of the number of the input branch of any first order collector-shoe gear access, determine that any first order is converged It includes: the first order collector-shoe gear for being not equal to zero for each output current value that stream device, which has input branch circuit break, in the difference The ratio of value and the output current maxima is greater than or equal to the number of targeted first order collector-shoe gear input branch In the case where inverse, determine that targeted first order collector-shoe gear has input branch circuit break.
Optionally, the number of the input branch of the first order collector-shoe gear access is less than or equal to 16 tunnels.Described second The number of the input branch of grade collector-shoe gear access is greater than or equal to 3 tunnels.The level of the classification bus structure is less than or equal to 4 Grade.
Optionally, the photovoltaic module design parameter includes: model, capacity, number, the connection type of the photovoltaic module (string or simultaneously), output voltage, electric current index, fuse types, cable model and length.
In a second aspect of an embodiment of the invention, the present invention provides a kind of photovoltaic power generation input circuit fault detection dress It sets.Wherein, the photovoltaic power generation input circuit is using classification bus structure.For accessing photovoltaic group in the classification bus structure The collector-shoe gear that part exports electric current is first order collector-shoe gear, the remittance of the output electric current for accessing the first order collector-shoe gear Stream device is second level collector-shoe gear, and each first order collector-shoe gear of same second level collector-shoe gear access is respectively connected to defeated The number for entering branch is identical and photovoltaic module design parameter is identical.Described device includes: acquisition module, is configured as by setting Set the output current value that the current detection circuit in the first order collector-shoe gear output end acquires the first order collector-shoe gear. Maximum value searching module is configured as the output electric current of each first order collector-shoe gear accessed in any second level collector-shoe gear In value, output current maxima is found out.Difference calculating module is configured as calculating the output current maxima and described The difference of the output current value of any first order collector-shoe gear of one second level collector-shoe gear access.Fault determination module is matched The ratio being set in the difference and the output current maxima is greater than or equal to any first order collector-shoe gear access Input branch number inverse in the case where, determine that any first order collector-shoe gear has input branch circuit break.
Optionally, described device further include: statistical module is configured as according to the collected first order collector-shoe gear Output current value and the classification bus structure, count the output current value of any collector-shoe gear.Electric current judgment module, It is configured as judging whether the output current value of any collector-shoe gear is equal to zero.Wherein, the fault determination module also by It is configured in the null situation of output current value of any collector-shoe gear, determines the output of any collector-shoe gear The input branch circuit break of the high level-one collector-shoe gear of open circuit or the output electric current for accessing any collector-shoe gear.
Optionally, the electric current judgment module is configured as according to the classification bus structure, from highest collector-shoe gear To first order collector-shoe gear, judge whether the output current value of each collector-shoe gear is equal to zero step by step.
Optionally, described device further include: period setup module is configured as setting measurement period.The acquisition module It is configured as in each measurement period, the current detection circuit by the way that the first order collector-shoe gear output end is arranged in acquires And add up output current value of the first order collector-shoe gear in each measurement period, it obtains the first order collector-shoe gear and exists Accumulative output current value in each measurement period.The statistical module is configured as according to the first order collector-shoe gear every Accumulative output current value and the classification bus structure in a measurement period, count each collector-shoe gear in each statistics Accumulative output current value in period.The electric current judgment module is configured as according to the classification bus structure, from the superlative degree Collector-shoe gear judges accumulative output current value of each collector-shoe gear in each measurement period to first order collector-shoe gear step by step Whether zero is equal to.
Optionally, the acquisition module is configured as examining by the electric current that the first order collector-shoe gear output end is arranged in Slowdown monitoring circuit acquires the first order collector-shoe gear in the real-time output current value at current detection moment, obtains the first order confluence Real-time output current value of the device at the current detection moment.The statistical module is configured as according to the first order collector-shoe gear In the real-time output current value and the classification bus structure at current detection moment, counts each collector-shoe gear and examined currently Survey the real-time output current value at moment.The electric current judgment module is configured as according to the classification bus structure, from the superlative degree Collector-shoe gear judges that each collector-shoe gear is in the real-time output current value at current detection moment to first order collector-shoe gear step by step It is no to be equal to zero.
Optionally, the sequence of the level of collector-shoe gear from high in the end in the classification bus structure are as follows: fourth stage confluence dress It sets, third level collector-shoe gear, second level collector-shoe gear, first order collector-shoe gear.The electric current judgment module includes: level Four electric current Judging submodule, is configured as judging whether the output current value of fourth stage collector-shoe gear is equal to zero.Three-level selects submodule, quilt It is configured to connect in the case where the output current value of the fourth stage collector-shoe gear is not equal to zero from the fourth stage collector-shoe gear In the third level collector-shoe gear entered, any one third level collector-shoe gear is selected.Tertiary current judging submodule is configured as judging Whether the output current value of any one selected third level collector-shoe gear is equal to zero.Second level selects submodule, is configured as In the case that the output current value of any one third level collector-shoe gear is not equal to zero, converges from any one described third level and fill It sets in the second level collector-shoe gear of access, selects any one second level collector-shoe gear.Secondary current judging submodule, is configured as Judge whether the output current value of any one selected second level collector-shoe gear is equal to zero.Primary current judging submodule, quilt Be configured in the case where the output current value of any one second level collector-shoe gear is not equal to zero, judgement it is described any one the Whether the output current value of each first order collector-shoe gear of second level collector-shoe gear access is equal to zero.Second level gravity treatment submodule, quilt If be configured in the second level collector-shoe gear of any one third level collector-shoe gear access, there are also be not judged output electric current Value whether null second level collector-shoe gear, be not judged output current value whether null second level confluence dress from described Any one second level collector-shoe gear is reselected in setting, secondary current judging submodule described in retriggered executes the judgement institute The whether null step of output current value of any one second level collector-shoe gear of selection.Three-level gravity treatment submodule, is configured If there is no be not judged output current value in the second level collector-shoe gear for the access of any one described third level collector-shoe gear Whether null second level collector-shoe gear, be never judged in the whether null third level collector-shoe gear of output current value weight Any one third level collector-shoe gear is newly selected, it is selected that tertiary current judging submodule described in retriggered executes the judgement The whether null step of the output current value of any one third level collector-shoe gear.Wherein, the difference calculating module is configured For each first order collector-shoe gear for finding out any one second level collector-shoe gear access in the maximum value searching module In output current maxima after, for each output current value be not equal to zero first order collector-shoe gear, calculate institute one by one State the difference of the output current value of output current value maximum value and targeted first order collector-shoe gear.The fault determination module Be configured as being not equal to for each output current value zero first order collector-shoe gear, the difference and the output electric current most In the case that the ratio being worth greatly is greater than or equal to the inverse of the number of targeted first order collector-shoe gear input branch, institute is determined For first order collector-shoe gear have input branch circuit break.
In a second aspect of an embodiment of the invention, the present invention provides a kind of photovoltaic power generation input circuit fault detection system System.Wherein, the system comprises photovoltaic power generation input circuits, wherein the photovoltaic power generation input circuit is using classification confluence knot Structure, wherein the collector-shoe gear in the classification bus structure for accessing photovoltaic module output electric current is first order collector-shoe gear, Collector-shoe gear for accessing the output electric current of the first order collector-shoe gear is second level collector-shoe gear, same second level confluence The input branch that each first order collector-shoe gear of device access is respectively connected to number is identical and photovoltaic module design parameter phase Together；And the current detection circuit of the first order collector-shoe gear output end is set；And using any implementation of the invention The data processing equipment of photovoltaic power generation input circuit fault detection method described in example.
Optionally, the system also includes: data collector is configured as each current detection circuit is collected defeated Current value is summarized out, and the output current value after summarizing is transferred to the data processing equipment.
Since photovoltaic power generation input circuit of the invention is using classification bus structure, wherein in the classification bus structure Collector-shoe gear for accessing photovoltaic module output electric current is first order collector-shoe gear, for accessing the first order collector-shoe gear The collector-shoe gear of output electric current be second level collector-shoe gear, each first order of same second level collector-shoe gear access is converged dress The number for setting the input branch being respectively connected to is identical and photovoltaic module design parameter is identical, is converged by setting in the first order The current detection circuit of stream device output end acquires the output current value of the first order collector-shoe gear, converges in any second level In the output current value of each first order collector-shoe gear of device access, output current maxima is found out, the output is calculated The difference of the output current value of current maxima and any first order collector-shoe gear of any second level collector-shoe gear access, It is greater than or equal to the defeated of any first order collector-shoe gear access in the ratio of the difference and the output current maxima In the case where the inverse for entering the number of branch, determine that any first order collector-shoe gear has input branch circuit break.As it can be seen that this hair It is bright to acquire the output current value of first order collector-shoe gear by the way that current detection circuit is arranged in first order collector-shoe gear output end, The first order collector-shoe gear that input branch circuit break can be gone out to have by above-mentioned processing logic detection, to realize through less inspection Slowdown monitoring circuit finds the purpose of photovoltaic power generation input circuit trouble location.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram of photovoltaic power generation input circuit shown according to an exemplary embodiment.
Fig. 2 is the flow chart of photovoltaic power generation input circuit fault detection method shown according to an exemplary embodiment.
Fig. 3 is the flow chart of the photovoltaic power generation input circuit fault detection method shown according to another exemplary embodiment.
Fig. 4 is the flow chart of the photovoltaic power generation input circuit fault detection method shown according to a further exemplary embodiment.
Fig. 5 is the flow chart of the photovoltaic power generation input circuit fault detection method shown according to a further exemplary embodiment.
Fig. 6 is the block diagram of photovoltaic power generation input circuit fault detection means shown according to an exemplary embodiment.
Fig. 7 is the block diagram of the photovoltaic power generation input circuit fault detection means shown according to another exemplary embodiment.
Fig. 8 is the block diagram of photovoltaic power generation input circuit fault detection system shown according to an exemplary embodiment.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Fig. 1 is a kind of structural schematic diagram of photovoltaic power generation input circuit shown according to an exemplary embodiment.Such as Fig. 1 institute Show, which may include: to pass through series connection and/or the photovoltaic array 110 composed in parallel, first order confluence by photovoltaic module Device 130, the input branch 120, second that first order collector-shoe gear 130 is linked into for the output electric current by photovoltaic array 110 Grade collector-shoe gear 150, the input that second level collector-shoe gear 150 is linked into for the output electric current by first order collector-shoe gear 130 Branch 140, third level collector-shoe gear 170 are filled for the output electric current of second level collector-shoe gear 150 to be linked into third level confluence Set 170 input branch 160, fourth stage collector-shoe gear 190 and, for the output electric current of third level collector-shoe gear 170 to be connect Enter the input branch 180 to fourth stage collector-shoe gear 190.
Wherein, the number light that is identical, and accessing for the input branch 120 that each first order collector-shoe gear 130 is respectively connected to The photovoltaic module design parameter of photovoltaic array 110 is identical.In a kind of possible embodiment, the collector-shoe gear of same level is respectively connected to Input branch number it is identical and design parameter is identical.
Wherein, it is each provided with current detection circuit 131 respectively in the output end of each first order collector-shoe gear 130, uses In the output current value of acquisition first order collector-shoe gear 130.
Wherein, each current detection circuit 131 can be connect with data collector 100, and data collector 100 can be with number It is connected according to processing unit 101.The data collector 100 can be used for the collected output of each current detection circuit 131 Current value is summarized, and is transferred to data processing equipment 101.Data processing equipment 101 can be used for running the realization present invention The software of method.
For example, data collector 100 can be the commercial data collector of independently developed data collecting card or purchase, Such as the PCI-6224 of NI company.Data processing equipment 101 can be computer or work station.Current detection circuit 131 is also It can be according to prior art designed, designed or purchase.
Fig. 2 is the flow chart of photovoltaic power generation input circuit fault detection method shown according to an exemplary embodiment.It should The photovoltaic power generation input circuit that method is related to is using classification bus structure.Wherein, for accessing light in the classification bus structure The collector-shoe gear for lying prostrate component output electric current is first order collector-shoe gear, for accessing the output electric current of the first order collector-shoe gear Collector-shoe gear be second level collector-shoe gear, each first order collector-shoe gear of same second level collector-shoe gear access is respectively connected to Input branch number it is identical and photovoltaic module design parameter is identical.This method can be applied to various intelligent terminals, example Such as, computer or work station.For example, can be applied to computer 101 shown in Fig. 1.As shown in Fig. 2, this method can wrap It includes:
In step 210, by being arranged in described in the current detection circuit acquisition of the first order collector-shoe gear output end The output current value of first order collector-shoe gear.
In a step 220, in the output current value of each first order collector-shoe gear of any second level collector-shoe gear access In, find out output current maxima.
In step 230, any of the output current maxima with any second level collector-shoe gear access is calculated The difference of the output current value of first order collector-shoe gear.
In step 240, it is greater than or equal to described any the in the ratio of the difference and the output current maxima In the case where the inverse of the number of the input branch of level-one collector-shoe gear access, it is defeated to determine that any first order collector-shoe gear has Enter branch circuit break.
For example, the first order collector-shoe gear number for setting photovoltaic plant as m, accesses every the 1 of same second level collector-shoe gear The input number of branches of level-one collector-shoe gear access is identical, photovoltaic module design parameter is identical.Such as design parameter may include The model of photovoltaic module, capacity, number, connection type (string or simultaneously), output voltage, electric current index, fuse types, cable-type Number with length etc..Assuming that the input number of branches of each first order collector-shoe gear access is all n.Then:
The output electric current of each first order collector-shoe gear is respectively as follows:
I1=∑ I1j(j=1,2 ..., n), j indicate branch serial number.
I2=∑ I2j(j=1,2 ..., n)
…
Im=∑ Imj(j=1,2 ..., n)
Since input local road design parameter is identical, it is believed that under identical sunshine condition, each branch input current It is identical, that is, there is Ik1=Ik2=...=Ikj(k indicates collector-shoe gear serial number).If do not had in first order collector-shoe gear input branch Open circuit, then I1=I2=...=Im.If open circuit, I has occurred in the first order collector-shoe gear input branch of serial number kk=∑ Ikj (j=1,2 ..., p) (p < n).Furthermore, it is possible to learn p/n=Ik/Im.The number of breaking branch is n-p=n (1- i.e. in the device Ik/Im).That is, n (1-Ik/Im) >=1, (Im-Ik)/Im≥1/n.Therefore, for being linked into each of same second level collector-shoe gear In the output electric current of a first order collector-shoe gear, current maxima I is exportedmaxIt is certain to meet (Im-Ik)/Im≥1/n.Therefore, originally Invention accesses the output current maxima and any first of the first order collector-shoe gear of same second level collector-shoe gear by calculating The difference of the output current value of grade collector-shoe gear inputs the ratio of difference and the output current maxima greater than the collector-shoe gear The inverse of number of branches is compared, it can be determined that goes out whether any first order collector-shoe gear has input branch circuit break.
In a kind of possible embodiment, it is contemplated that behind 16 tunnels, every road electric current accounting in total current is 6%, into Enter into error range, can not judge.Therefore, the number of the input branch of the first order collector-shoe gear access is less than or equal to 16 tunnels.In view of second level collector-shoe gear has the input of 3 tunnels, when this grade of electric current can be made to compare, guarantees that there are two reference values, make It is more reliable to obtain comparison result, therefore, the number of the input branch of the second level collector-shoe gear access is greater than or equal to 3 tunnels. Wherein, the level of the classification bus structure is less than or equal to 4 grades.
As it can be seen that the present invention is converged by the way that current detection circuit is arranged in first order collector-shoe gear output end to acquire the first order The output current value of device can go out to have by above-mentioned processing logic detection the first order collector-shoe gear of input branch circuit break, from And it realizes through less detection circuit and finds the purpose of photovoltaic power generation input circuit trouble location.
Fig. 3 is the flow chart of the photovoltaic power generation input circuit fault detection method shown according to another exemplary embodiment. As shown in figure 3, this method may include:
In the step 310, by being arranged in described in the current detection circuit acquisition of the first order collector-shoe gear output end The output current value of first order collector-shoe gear.
In step 311, it is converged according to the output current value of the collected first order collector-shoe gear and the classification Flow structure counts the output current value of any one collector-shoe gear.
For example, any second level collector-shoe gear, the third level can be calculated according to classification bus structure as shown in Figure 1 The output current value of collector-shoe gear, fourth stage collector-shoe gear.
In step 312, judge whether the output current value of any collector-shoe gear is equal to zero.
In step 313, in the null situation of output current value of any collector-shoe gear, determine described any The input of the high level-one collector-shoe gear of the output open circuit of collector-shoe gear or the output electric current for accessing any collector-shoe gear Branch circuit break.
In step 320, it in the output current value of each first order collector-shoe gear of any second level collector-shoe gear, looks into Find out output current maxima.
In a step 330, any of the output current maxima with any second level collector-shoe gear access is calculated The difference of the output current value of first order collector-shoe gear.
In step 340, it is greater than or equal to described any the in the ratio of the difference and the output current maxima In the case where the inverse of the number of the input branch of level-one collector-shoe gear access, it is defeated to determine that any first order collector-shoe gear has Enter branch circuit break.
It is understood that any collector-shoe gear is normal (not disconnecting) during normal power generation, then confluence dress is accessed The electric current for all input branches set can be converged by the collector-shoe gear, and the probability that all input branches do not export simultaneously Very little.Therefore, in the null situation of output current value of any collector-shoe gear, it is possible to determine that any collector-shoe gear it is defeated The input branch circuit break of the high level-one collector-shoe gear of open circuit or the output electric current for accessing any collector-shoe gear out.
For example, can be determined that the third level is converged if the output current value of some third level collector-shoe gear is equal to zero The input branch of the fourth stage collector-shoe gear of the output open circuit of device or the output electric current for accessing the third level collector-shoe gear Road open circuit.
In the present embodiment, due to first passing through pair before judging whether first order collector-shoe gear has input branch circuit break The whether null simple judgement of the output current value of collector-shoe gear, detects whether collector-shoe gear has output open circuit or high level-one The input branch circuit break of collector-shoe gear improves detection efficiency so as to detect trouble location as early as possible.
Fig. 4 is the flow chart of the photovoltaic power generation input circuit fault detection method shown according to a further exemplary embodiment. As shown in figure 4, this method may include:
In step 410, by being arranged in described in the current detection circuit acquisition of the first order collector-shoe gear output end The output current value of first order collector-shoe gear.
For example, measurement period can be set.It is defeated in the first order collector-shoe gear by being arranged in each measurement period The current detection circuit of outlet acquires and adds up output current value of the first order collector-shoe gear in each measurement period, obtains To accumulative output current value of the first order collector-shoe gear in each measurement period.
For another example described the can be acquired by the way that the current detection circuit of the first order collector-shoe gear output end is arranged in Level-one collector-shoe gear obtains the first order collector-shoe gear in current detection in the real-time output current value at current detection moment The real-time output current value carved.
In step 411, converged according to the output current value of the collected first order collector-shoe gear and the classification Flow structure counts the output current value of each collector-shoe gear.
For example, each second level collector-shoe gear can be calculated according to classification bus structure as shown in Figure 1, the third level converges Flow the output current value of device, fourth stage collector-shoe gear.
A kind of possible embodiment can be according to the first order in conjunction with the embodiment of above-mentioned setting measurement period Accumulative output current value and the classification bus structure of the collector-shoe gear in each measurement period count each confluence dress Set the accumulative output current value in each measurement period.
Alternatively possible embodiment, it is real-time defeated at the current detection moment in conjunction with above-mentioned detection first order collector-shoe gear The embodiment of current value out, can according to the first order collector-shoe gear the current detection moment real-time output current value with And the classification bus structure, each collector-shoe gear is counted in the real-time output current value at current detection moment.
In step 412, according to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, by Grade judges whether the output current value of each collector-shoe gear is equal to zero.
A kind of possible embodiment can converge in conjunction with the embodiment of above-mentioned setting measurement period according to the classification Flow structure judges each collector-shoe gear in each measurement period step by step from highest collector-shoe gear to first order collector-shoe gear Accumulative output current value whether be equal to zero.
Alternatively possible embodiment, it is real-time defeated at the current detection moment in conjunction with above-mentioned detection first order collector-shoe gear The embodiment of current value out, can according to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, Judge whether each collector-shoe gear is equal to zero in the real-time output current value at current detection moment step by step.
In step 413, in the null situation of output current value of any collector-shoe gear, determine any confluence The input branch of the high level-one collector-shoe gear of the output open circuit of device or the output electric current for accessing any collector-shoe gear Open circuit.
A kind of possible embodiment can work as any collector-shoe gear in conjunction with the embodiment of above-mentioned setting measurement period In the null situation of accumulative output current value in some measurement period, the output open circuit of any collector-shoe gear is determined Or the input branch circuit break of the high level-one collector-shoe gear of the output electric current for accessing any collector-shoe gear.
Alternatively possible embodiment, it is real-time defeated at the current detection moment in conjunction with above-mentioned detection first order collector-shoe gear The embodiment of current value out, can be when any collector-shoe gear is in the null feelings of real-time output current value at current detection moment Under condition, determine any collector-shoe gear exports the high by one of output electric current breaking or for accessing any collector-shoe gear The input branch circuit break of grade collector-shoe gear.
At step 420, in the output current value of each first order collector-shoe gear of any second level collector-shoe gear access In, find out output current maxima.
A kind of possible embodiment can be for each statistics week in conjunction with the embodiment of above-mentioned setting measurement period Phase, in accumulative output current value of each first order collector-shoe gear that any second level collector-shoe gear accesses in the measurement period In, find out accumulative output current maxima.
Alternatively possible embodiment, it is real-time defeated at the current detection moment in conjunction with above-mentioned detection first order collector-shoe gear The embodiment of current value out, can be in each first order collector-shoe gear that any second level collector-shoe gear accesses in current detection In the real-time output current value at moment, the output current maxima at current time is found out.
In step 430, any of the output current maxima with any second level collector-shoe gear access is calculated The difference of the output current value of a first order collector-shoe gear.
A kind of possible embodiment can be for each statistics week in conjunction with the embodiment of above-mentioned setting measurement period Phase calculates accumulative output electric current of each first order collector-shoe gear of any second level collector-shoe gear access in the measurement period Output current maxima in value, any one first order collector-shoe gear with any second level collector-shoe gear access is in the system Count the difference of the accumulative output current value in the period.
Alternatively possible embodiment, it is real-time defeated at the current detection moment in conjunction with above-mentioned detection first order collector-shoe gear The embodiment of current value out, each first order collector-shoe gear that can calculate any second level collector-shoe gear access are examined currently The maximum value for surveying the real-time output current value at moment is converged with any one first order of any second level collector-shoe gear access Difference of the device in the real-time output current value at current detection moment.
In step 440, the difference and the output current maxima ratio be greater than or equal to it is described any one In the case where the inverse of the number of the input branch of first order collector-shoe gear access, any one described first order collector-shoe gear is determined There is input branch circuit break.
A kind of possible embodiment can be in the calculated difference of institute in conjunction with the embodiment of above-mentioned setting measurement period The ratio of value and the output current maxima in accumulative output current value is greater than or equal to any one described first order collector-shoe gear In the case where the inverse of the number of the input branch of access, determine that any one described first order collector-shoe gear has input branch disconnected Road.
Alternatively possible embodiment, it is real-time defeated at the current detection moment in conjunction with above-mentioned detection first order collector-shoe gear The embodiment of current value out, can calculated difference and current detection moment real-time output current value maximum value Ratio be greater than or equal to any one first order collector-shoe gear access input branch number inverse in the case where, sentence Any one fixed described first order collector-shoe gear has input branch circuit break.
In the present embodiment, since before judging whether first order collector-shoe gear has input branch circuit break, elder generation is right step by step Whether the output current value of each collector-shoe gear, which is equal to zero, is judged, as long as so that some collector-shoe gear has input branch disconnected Road, so that it may detected as early as possible, improve detection efficiency.
Fig. 5 is the flow chart of the photovoltaic power generation input circuit fault detection method shown according to a further exemplary embodiment. In the present embodiment, the sequence of the level of collector-shoe gear from high in the end in the classification bus structure are as follows: fourth stage collector-shoe gear, Third level collector-shoe gear, second level collector-shoe gear, first order collector-shoe gear.As shown in figure 5, this method may include:
In step 510, by being arranged in described in the current detection circuit acquisition of the first order collector-shoe gear output end The output current value of first order collector-shoe gear.
In step 511, converged according to the output current value of the collected first order collector-shoe gear and the classification Flow structure, count fourth stage collector-shoe gear, third level collector-shoe gear, second level collector-shoe gear, first order collector-shoe gear it is defeated Current value out.
In step 512, judge whether the output current value of fourth stage collector-shoe gear is equal to zero.
In step 513, in the null situation of output current value of the fourth stage collector-shoe gear, described the is determined The output open circuit of level Four collector-shoe gear.
For example, can terminate current detection in the case where determining the output open circuit of the fourth stage collector-shoe gear, arrange After failure, fault detection is re-started.
In the step 514, in the case where the output current value of the fourth stage collector-shoe gear is not equal to zero, from described the In the third level collector-shoe gear of level Four collector-shoe gear access, any one third level collector-shoe gear is selected.
In step 515, judge whether the output current value of any one selected third level collector-shoe gear is equal to zero.
In step 516, in the null situation of output current value of any one third level collector-shoe gear, determine The output open circuit of any one third level collector-shoe gear or the input branch circuit break of fourth stage collector-shoe gear.
For example, in the output open circuit or the input branch of fourth stage collector-shoe gear that determine any one third level collector-shoe gear In the case where the open circuit of road, current detection can be terminated, after debugging, re-start fault detection.
In step 517, in the case where the output current value of any one third level collector-shoe gear is not equal to zero, from In the second level collector-shoe gear of any one third level collector-shoe gear access, any one second level collector-shoe gear is selected.
In step 518, judge whether the output current value of any one selected second level collector-shoe gear is equal to zero.
In step 519, in the null situation of output current value of any one second level collector-shoe gear, determine Any one second level collector-shoe gear exports open circuit or the input branch for accessing any one second level collector-shoe gear Road open circuit.
For example, the output open circuit for determining any one second level collector-shoe gear or for access it is described any one second In the case where the input branch circuit break of grade collector-shoe gear, current detection can be terminated, after debugging, re-start failure Detection.
In step 520, in the case where the output current value of any one second level collector-shoe gear is not equal to zero, sentence Whether the output current value of each first order collector-shoe gear of disconnected any one second level collector-shoe gear access is equal to zero.
In step 521, in the null situation of output current value of some first order collector-shoe gear, determine this first The output open circuit of grade collector-shoe gear or the input branch circuit break for accessing the first order collector-shoe gear.
In step 522, for any second level collector-shoe gear, it is being linked into any second level collector-shoe gear Each first order collector-shoe gear output current value in, find out output current maxima.
In step 530, zero first order collector-shoe gear is not equal to for each output current value, is calculated one by one described defeated The difference of the output current value of current maxima and targeted first order collector-shoe gear out.
In step 540, it is greater than or equal to targeted the in the ratio of the difference and the output current maxima In the case that level-one collector-shoe gear inputs the inverse of the number of branch, determine that targeted first order collector-shoe gear has input branch Open circuit.
For example, can terminate current in the case where determining that targeted first order collector-shoe gear has input branch circuit break Detection, after debugging, re-starts fault detection.
In step 541, if there are also not in the second level collector-shoe gear of any one described third level collector-shoe gear access It is judged the whether null second level collector-shoe gear of output current value, is not judged whether output current value is equal to zero from described Second level collector-shoe gear in reselect any one second level collector-shoe gear, step 518 is backed within, to judge again Whether the output current value of any one second level collector-shoe gear of selection is equal to zero.
In step 542, if do not deposited in the second level collector-shoe gear that any one described third level collector-shoe gear is accessed It is not judged the whether null second level collector-shoe gear of output current value, is never being judged whether output current value is equal to zero Third level collector-shoe gear in reselect any one third level collector-shoe gear, step 515 is backed within, to judge again Whether the output current value of any one third level collector-shoe gear of selection is equal to zero.
In step 543, if there is no not being judged the whether null third level collector-shoe gear of output current value, when Preceding detection terminates.
For example, after current detection terminates step 510 can be jumped to, under starting according to measurement period setting time One-time detection.
In the present embodiment, since before judging whether first order collector-shoe gear has input branch circuit break, elder generation is right step by step Fourth stage collector-shoe gear, third level collector-shoe gear, second level collector-shoe gear output current value whether be equal to zero and judged, from And according to the null simple judgement of the output current value of wherein some collector-shoe gear, quickly detect fourth stage collector-shoe gear, The trouble location of third level collector-shoe gear, second level collector-shoe gear, improves detection efficiency.
In order to understand the present embodiment more easily, below with reference to a kind of sub-clustering, the mode of total current value is grouped to this Inventive embodiments are illustrated.
For example, the electric current for accessing the same second level collector-shoe gear can be divided into one group, the same third will be accessed The electric current of grade collector-shoe gear is divided into cluster.Sub-clustering is grouped total electric current, and one group of total electric current out is that a second level is converged The output electric current of device is flowed, the total electric current out of cluster is the output electric current an of third level collector-shoe gear.Each cluster is total out Electric current summation be fourth season collector-shoe gear output electric current.It is thus possible to count fourth stage collector-shoe gear, each third Grade collector-shoe gear, each second level collector-shoe gear, each first order collector-shoe gear output current value.
In this embodiment, it can first determine whether the total current value summation out of each cluster is equal to zero.
If current value summation is equal to zero, the output open circuit of fourth stage collector-shoe gear can be determined that.
If current value summation is not equal to zero, it can select the 1st cluster that current value is added up to be judged first, judge the 1st Cluster adds up to whether current value is equal to zero.
If the 1st cluster add up to current value be equal to zero, can be determined that the 1st cluster the third level collector-shoe gear output open circuit or The 1st tunnel inputs branch circuit break in fourth stage collector-shoe gear.
If the 1st cluster adds up to current value to be not equal to zero, the 1st group of the 1st cluster total current value can be selected to be judged first, Judge whether the 1st group of the 1st cluster total current value is equal to zero.
If the 1st the 1st group of cluster adds up to current value to be equal to zero, it can be determined that the second level collector-shoe gear of the 1st group of the 1st cluster is defeated The 1st tunnel inputs branch circuit break in breaking or third level collector-shoe gear out.
If the 1st the 1st group of cluster adds up to current value to be not equal to zero, judge whether the 1st group of the 1st road current value value of the 1st cluster is equal to Zero.
If the 1st the 1st road current value of the 1st group of cluster is equal to zero, the first order confluence on the 1st group of the 1st tunnel of the 1st cluster can be determined that The input branch circuit break of device output open circuit or second level collector-shoe gear.
If the 1st the 1st road current value of the 1st group of cluster is not equal to zero, the 1st road Zu Ge electric current of the 1st cluster can be first found out Maximum value calculates the difference of the maximum value Yu the 1st the 1st group of the 1st road current value of cluster, calculates the ratio of the difference Yu the maximum value, Judge whether the ratio is greater than or equal to the inverse of the number for the input branch that first order collector-shoe gear is accessed.If it is, It can be determined that first collector-shoe gear on the 1st the 1st group of the 1st tunnel of cluster has input branch circuit break.
If first order collector-shoe gear of the 1st the 1st group of the cluster there are also under all the way, following first order detection step is repeated Suddenly, until the 1st group of the 1st cluster of all first order collector-shoe gears complete open circuit judgement.First order detecting step includes: to judge the 1st Whether current value is equal to zero all the way under the 1st group of cluster, if being equal to zero, determines the defeated of the first order collector-shoe gear under this all the way Open circuit or the input of second level collector-shoe gear open circuit out.If being not equal to zero, calculate the maximum value that finds out and this under it is electric all the way The difference of flow valuve, the ratio of calculating difference and the maximum value judge whether the ratio is greater than or equal to first order collector-shoe gear institute The inverse of the number of the input branch of access.If it is, can be determined that the first order collector-shoe gear under this all the way has input branch Road open circuit.
After the 1st group of the 1st cluster of detection, the collector-shoe gear of other groups of the 1st cluster can be turned to, circulation is according to above the The detection mode that the 1st group of 1 cluster is detected, and is terminated until the collector-shoe gear of the 1st all each groups of cluster all detects.
After the collector-shoe gear of the 1st all each groups of cluster all detects, the collector-shoe gear of other clusters can be turned to, circulation is pressed It is detected according to the detection mode of above 1st cluster, is terminated until the collector-shoe gear of each cluster all detects.
Wherein, by taking the detection on the 1st road Zux of the 1st cluster as an example, it can be detected, can also be used using real-time current Integrating electric value is detected in measurement period.Sample frequency in the measurement period can be less than 30 seconds.Measurement period can To select day or week.In measurement period, the 1st road Zux integrating electric value of the 1st cluster can be added up.If the 1st the 1st group of cluster Integrating electric value is equal to zero in xth road real-time current value or measurement period, the first order collector-shoe gear on the 1st road Zux of the 1st cluster Output open circuit or the input open circuit of second level collector-shoe gear.If tired out in the 1st road Zux real-time current value of the 1st cluster or measurement period It counts current value and is not equal to zero, judge whetherImaxTo add up in the 1st road Zu Ge real-time current value or measurement period Maximum value in current value, I are integrating electric value in xth road real-time current value or measurement period, and n is the input branch on xth road Number.If it is determined thatBranch is inputted in the first order collector-shoe gear on the 1st road Zux of the 1st cluster open circuit, open circuit Quantity isIf it is determined thatIn the first order collector-shoe gear on the 1st road Zux of the 1st cluster input branch without Open circuit.
Fig. 6 is the block diagram of photovoltaic power generation input circuit fault detection means shown according to an exemplary embodiment.The dress The photovoltaic power generation input circuit being related to is set using classification bus structure.Wherein, for accessing photovoltaic in the classification bus structure The collector-shoe gear that component exports electric current is first order collector-shoe gear, for accessing the output electric current of the first order collector-shoe gear Collector-shoe gear is second level collector-shoe gear, what each first order collector-shoe gear of same second level collector-shoe gear access was respectively connected to The number of input branch is identical and photovoltaic module design parameter is identical.The device can be configured at various intelligent terminals or service Device, for example, computer or work station.For example, computer 101 shown in Fig. 1 can be configured at.As shown in fig. 6, the device can To include: acquisition module 610, maximum value searching module 620, difference calculating module 630, fault determination module 640.
The acquisition module 610 can be configured as and be examined by the electric current that the first order collector-shoe gear output end is arranged in Slowdown monitoring circuit acquires the output current value of the first order collector-shoe gear.
The maximum value searching module 620 can be configured as each first order in the access of any second level collector-shoe gear In the output current value of collector-shoe gear, output current maxima is found out.
The difference calculating module 630 can be configured as and calculate the output current maxima and any second level The difference of the output current value of any first order collector-shoe gear of collector-shoe gear access.
The fault determination module 640 can be configured as big in the difference and the ratio for exporting current maxima In or equal to any first order collector-shoe gear access input branch number inverse in the case where, determine described any First order collector-shoe gear has input branch circuit break.
As it can be seen that the present invention is converged by the way that current detection circuit is arranged in first order collector-shoe gear output end to acquire the first order The output current value of device can be detected out the first order collector-shoe gear of input branch circuit break, to realize by less Detection circuit finds the purpose of photovoltaic power generation input circuit trouble location.
Fig. 7 is the block diagram of the photovoltaic power generation input circuit fault detection means shown according to another exemplary embodiment.Such as Shown in Fig. 7, which can also include: statistical module 611, can be configured as according to the collected first order confluence dress The output current value and the classification bus structure set, count the output current value of any collector-shoe gear, measurement period can To select day or week.Electric current judgment module 612 can be configured as and judge that the output current value of any collector-shoe gear is It is no to be equal to zero.Wherein, the fault determination module 640 can be additionally configured to the output current value in any collector-shoe gear In null situation, the output open circuit or the output for accessing any collector-shoe gear that determine any collector-shoe gear The input branch circuit break of the high level-one collector-shoe gear of electric current.
In the present embodiment, due to first passing through pair before judging whether first order collector-shoe gear has input branch circuit break The whether null simple judgement of the output current value of collector-shoe gear, detects whether collector-shoe gear has output open circuit or high level-one The input branch circuit break of collector-shoe gear improves detection efficiency so as to detect trouble location as early as possible.
In a kind of possible embodiment, the electric current judgment module 612 can be configured as to converge according to the classification Structure, from highest collector-shoe gear to first order collector-shoe gear, judge step by step each collector-shoe gear output current value whether etc. In zero.
In a kind of possible embodiment, as shown in fig. 7, described device can also include: period setup module 613, quilt It is configured to setting measurement period.The acquisition module 610 can be configured as in each measurement period, by being arranged described The current detection circuit of first order collector-shoe gear output end acquires and adds up the first order collector-shoe gear in each measurement period Interior output current value obtains accumulative output current value of the first order collector-shoe gear in each measurement period.The system Meter module 611 can be configured as the accumulative output current value according to the first order collector-shoe gear in each measurement period with And the classification bus structure, count accumulative output current value of each collector-shoe gear in each measurement period.The electricity Stream judgment module 612 is configured as according to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, by Grade judges whether accumulative output current value of each collector-shoe gear in each measurement period is equal to zero.
In a kind of possible embodiment, the acquisition module 610 be can be configured as by being arranged in the first order The current detection circuit of collector-shoe gear output end acquires the first order collector-shoe gear in the real-time output electricity at current detection moment Flow valuve obtains the first order collector-shoe gear in the real-time output current value at current detection moment.The statistical module 611 can be with It is configured as being converged according to the first order collector-shoe gear in the real-time output current value at current detection moment and the classification Structure counts each collector-shoe gear in the real-time output current value at current detection moment.The electric current judgment module 612 can be with It is configured as, from highest collector-shoe gear to first order collector-shoe gear, judging each remittance step by step according to the classification bus structure Flow whether real-time output current value of the device at the current detection moment is equal to zero.
In a kind of possible embodiment, the sequence of the level of collector-shoe gear from high in the end in the classification bus structure Are as follows: fourth stage collector-shoe gear, third level collector-shoe gear, second level collector-shoe gear, first order collector-shoe gear.The electric current judges mould Block 612 may include: level Four electric current judging submodule 612a, three-level selection submodule 612b, tertiary current judging submodule 612c, second level select submodule 612d, secondary current judging submodule 612e, primary current judging submodule 612f, second level weight Select submodule 612g, three-level gravity treatment submodule 612h.
Level Four electric current judging submodule 612a can be configured as and judge that the output current value of fourth stage collector-shoe gear is It is no to be equal to zero.
The three-level selects submodule 612b, and the output current value that can be configured as in the fourth stage collector-shoe gear differs In the case where zero, from the third level collector-shoe gear that the fourth stage collector-shoe gear accesses, any one third level is selected to converge Device.
Tertiary current judging submodule 612c can be configured as and judge any one selected third level collector-shoe gear Output current value whether be equal to zero.
The second level selects submodule 612d, can be configured as the output electric current in any one third level collector-shoe gear In the case that value is not equal to zero, from the second level collector-shoe gear that any one described third level collector-shoe gear accesses, select any A second level collector-shoe gear.
Secondary current judging submodule 612e can be configured as and judge any one selected second level collector-shoe gear Output current value whether be equal to zero.
Primary current judging submodule 612f, can be configured as the output in any one second level collector-shoe gear In the case that current value is not equal to zero, each first order collector-shoe gear of any one second level collector-shoe gear access is judged Whether output current value is equal to zero.
Second level gravity treatment submodule 612g, if can be configured as the of described any one third level collector-shoe gear access In second level collector-shoe gear, there are also the whether null second level collector-shoe gear of output current value is not judged, it is not judged to from described Any one second level collector-shoe gear, retriggered are reselected in the whether null second level collector-shoe gear of disconnected output current value The secondary current judging submodule 612e executes the output electric current of any one selected second level collector-shoe gear of judgement Value whether null step.
Three-level gravity treatment submodule 612h, if can be configured as the of described any one third level collector-shoe gear access In second level collector-shoe gear, there is no the whether null second level collector-shoe gear of output current value is not judged, never it is judged Any one third level collector-shoe gear, retriggered institute are reselected in the whether null third level collector-shoe gear of output current value State the output current value that tertiary current judging submodule 612c executes any one selected third level collector-shoe gear of judgement Whether null step.
Wherein, the difference calculating module 630 can be configured as found out in the maximum value searching module 620 it is described After output current maxima in each first order collector-shoe gear of any one second level collector-shoe gear access, for each defeated Current value is not equal to zero first order collector-shoe gear out, calculates the output current maxima one by one and the targeted first order is converged Flow the difference of the output current value of device.
The fault determination module 640 can be configured as the first order for each output current value not equal to zero and converge Device is greater than or equal to targeted first order collector-shoe gear in the ratio of the difference and the output current maxima and inputs In the case where the inverse of the number of branch, determine that targeted first order collector-shoe gear has input branch circuit break.
Fig. 8 is the block diagram of photovoltaic power generation input circuit fault detection system shown according to an exemplary embodiment.Such as Fig. 8 Shown, which may include: photovoltaic power generation input circuit 810, current detection circuit 820, data processing equipment 830.
Wherein, the photovoltaic power generation input circuit 810 is using classification bus structure, wherein in the classification bus structure Collector-shoe gear for accessing photovoltaic module output electric current is first order collector-shoe gear, for accessing the first order collector-shoe gear The collector-shoe gear of output electric current be second level collector-shoe gear, each first order of same second level collector-shoe gear access is converged dress The number for setting the input branch being respectively connected to is identical and photovoltaic module design parameter is identical.
Wherein, current detection circuit 820 is arranged in the first order collector-shoe gear output end.
Wherein, data processing equipment 830 applies the event of the photovoltaic power generation input circuit as described in any embodiment of that present invention Hinder detection method.
As it can be seen that the present invention is converged by the way that current detection circuit is arranged in first order collector-shoe gear output end to acquire the first order The output current value of device can be tested with the first order collector-shoe gear of input branch circuit break by data processing equipment, from And it realizes through less detection circuit and finds the purpose of photovoltaic power generation input circuit trouble location.
It, can be with as shown in figure 8, the system can also include: data collector 840 in a kind of possible embodiment It is configured as summarizing the collected output current value of each current detection circuit, the output current value transmission after summarizing To the data processing equipment.
It should be noted that data collector 840 described in the embodiment of the present invention is drawn with a dashed line in fig. 8, to indicate this Equipment is not the necessaries of system provided in an embodiment of the present invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can It realizes by means of software and necessary general hardware platform.Based on this understanding, technical solution of the present invention essence On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment (can be personal computer, server or the network equipment etc.) executes the certain of each embodiment of the application or embodiment Method described in part.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally The thought of invention, it should also be regarded as the disclosure of the present invention.

Claims (17)

1. a kind of photovoltaic power generation input circuit fault detection method, which is characterized in that the photovoltaic power generation input circuit, which uses, to be divided Grade bus structure, wherein the collector-shoe gear in the classification bus structure for accessing photovoltaic module output electric current is the first order Collector-shoe gear is second level collector-shoe gear for accessing the collector-shoe gear of output electric current of the first order collector-shoe gear, same The input branch that each first order collector-shoe gear of second level collector-shoe gear access is respectively connected to number is identical and photovoltaic module Design parameter is identical, which comprises
Current detection circuit by the way that the first order collector-shoe gear output end is arranged in acquires the first order collector-shoe gear Output current value；
In the output electric current of each first order collector-shoe gear of any second level collector-shoe gear access, output electric current is found out most Big value；
Calculate any first order collector-shoe gear of the output current maxima and any second level collector-shoe gear access The difference of output current value；
It is greater than or equal to any first order collector-shoe gear in the ratio of the difference and the output current maxima to access Input branch number inverse in the case where, determine that any first order collector-shoe gear has input branch circuit break.
2. the method according to claim 1, wherein the method also includes:
According to the output current value and the classification bus structure of the collected first order collector-shoe gear, count any The output current value of collector-shoe gear；
Judge whether the output current value of any collector-shoe gear is equal to zero；
In the null situation of output current value of any collector-shoe gear, determine that the output of any collector-shoe gear is disconnected The input branch circuit break of the high level-one collector-shoe gear of road or the output electric current for accessing any collector-shoe gear.
3. according to the method described in claim 2, it is characterized in that, the output current value for judging any collector-shoe gear whether Include: equal to zero
According to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, each confluence dress is judged step by step Whether the output current value set is equal to zero.
4. according to the method described in claim 3, it is characterized in that, the method also includes: setting measurement period；
The current detection circuit by the way that the first order collector-shoe gear output end is arranged in acquires the first order confluence dress The output current value set includes:
In each measurement period, the current detection circuit by the way that the first order collector-shoe gear output end is arranged in acquires and tires out Output current value of the first order collector-shoe gear in each measurement period is counted, obtains the first order collector-shoe gear each Accumulative output current value in measurement period；
The output current value and the classification bus structure according to the collected first order collector-shoe gear, counts The output current value of any collector-shoe gear includes:
According to accumulative output current value and classification confluence knot of the first order collector-shoe gear in each measurement period Structure counts accumulative output current value of each collector-shoe gear in each measurement period；
It is described according to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, judge each remittance step by step Whether the output current value of stream device, which is equal to zero, includes:
According to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, each confluence dress is judged step by step Whether the accumulative output current value set in each measurement period is equal to zero.
5. according to the method described in claim 4, it is characterized in that, the sample frequency in the measurement period was less than 30 seconds.
6. according to the method described in claim 3, it is characterized in that, described exported by setting in the first order collector-shoe gear The output current value that the current detection circuit at end acquires the first order collector-shoe gear includes:
Current detection circuit by the way that the first order collector-shoe gear output end is arranged in acquires the first order collector-shoe gear and exists The real-time output current value at current detection moment obtains the first order collector-shoe gear in the real-time output electricity at current detection moment Flow valuve；
The output current value and the classification bus structure according to the collected first order collector-shoe gear, counts The output current value of any collector-shoe gear includes:
Real-time output current value and the classification bus structure according to the first order collector-shoe gear at the current detection moment, Each collector-shoe gear is counted in the real-time output current value at current detection moment；
It is described according to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, judge each remittance step by step Whether the output current value of stream device, which is equal to zero, includes:
According to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, each confluence dress is judged step by step Set whether the real-time output current value at the current detection moment is equal to zero.
7. according to the method described in claim 3, it is characterized in that, the level of collector-shoe gear is from height in the classification bus structure Sequence on earth are as follows: fourth stage collector-shoe gear, third level collector-shoe gear, second level collector-shoe gear, first order collector-shoe gear；
It is described according to the classification bus structure, from highest collector-shoe gear to first order collector-shoe gear, judge each remittance step by step Whether the output current value of stream device, which is equal to zero, includes:
Judge whether the output current value of fourth stage collector-shoe gear is equal to zero；
In the case where the output current value of the fourth stage collector-shoe gear is not equal to zero, accessed from the fourth stage collector-shoe gear Third level collector-shoe gear in, select any one third level collector-shoe gear；
Judge whether the output current value of any one selected third level collector-shoe gear is equal to zero；
In the case where the output current value of any one third level collector-shoe gear is not equal to zero, from any one described third level In the second level collector-shoe gear of collector-shoe gear access, any one second level collector-shoe gear is selected；
Judge whether the output current value of any one selected second level collector-shoe gear is equal to zero；
In the case where the output current value of any one second level collector-shoe gear is not equal to zero, judgement it is described any one second Whether the output current value of each first order collector-shoe gear of grade collector-shoe gear access is equal to zero；
If there are also be not judged output current value in the second level collector-shoe gear of any one third level collector-shoe gear access Whether null second level collector-shoe gear, be not judged the whether null second level collector-shoe gear of output current value from described In reselect any one second level collector-shoe gear, back within selected any one second level collector-shoe gear of the judgement The whether null step of output current value；
If there is no be not judged output electric current in the second level collector-shoe gear of any one third level collector-shoe gear access Value whether null second level collector-shoe gear, be never judged in the whether null third level collector-shoe gear of output current value Any one third level collector-shoe gear is reselected, any one selected third level collector-shoe gear of judgement is backed within The whether null step of output current value；
Wherein, any first order remittance for calculating the output current maxima and any second level collector-shoe gear access The difference of output current value for flowing device includes:
Output electric current in each first order collector-shoe gear for finding out any one second level collector-shoe gear access is maximum After value, zero first order collector-shoe gear is not equal to for each output current value, calculates the output current maxima one by one With the difference of the output current value of targeted first order collector-shoe gear；
The ratio in the difference and the output current maxima is greater than or equal to any first order collector-shoe gear In the case where the inverse of the number of the input branch of access, determine that any first order collector-shoe gear has input branch circuit break packet It includes:
It is not equal to zero first order collector-shoe gear for each output current value, in the difference and the output current maxima The ratio number that is greater than or equal to targeted first order collector-shoe gear input branch inverse in the case where, determine targeted First order collector-shoe gear have input branch circuit break.
8. the method according to claim 1, wherein the number of the input branch of first order collector-shoe gear access Mesh is less than or equal to 16 tunnels；
The number of the input branch of the second level collector-shoe gear access is greater than or equal to 3 tunnels；
The level of the classification bus structure is less than or equal to 4 grades.
9. the method according to claim 1, wherein the photovoltaic module design parameter includes: the photovoltaic group Model, capacity, number, connection type, output voltage, electric current index, fuse types, cable model and the length of part.
10. a kind of photovoltaic power generation input circuit fault detection means, which is characterized in that the photovoltaic power generation input circuit, which uses, to be divided Grade bus structure, wherein the collector-shoe gear in the classification bus structure for accessing photovoltaic module output electric current is the first order Collector-shoe gear is second level collector-shoe gear for accessing the collector-shoe gear of output electric current of the first order collector-shoe gear, same The input branch that each first order collector-shoe gear of second level collector-shoe gear access is respectively connected to number is identical and photovoltaic module Design parameter is identical, and described device includes:
Acquisition module is configured as described in the current detection circuit acquisition by the way that the first order collector-shoe gear output end is arranged in The output current value of first order collector-shoe gear；
Maximum value searching module is configured as the output of each first order collector-shoe gear accessed in any second level collector-shoe gear In current value, output current maxima is found out；
Difference calculating module is configured as calculating the output current maxima and any second level collector-shoe gear access The difference of the output current value of any first order collector-shoe gear；
Fault determination module is configured as being greater than or equal to described appoint in the ratio of the difference and the output current maxima In the case where the inverse of the number of the input branch of one first order collector-shoe gear access, any first order collector-shoe gear is determined There is input branch circuit break.
11. device according to claim 10, which is characterized in that described device further include:
Statistical module is configured as being converged according to the output current value of the collected first order collector-shoe gear and the classification Flow structure counts the output current value of any collector-shoe gear；
Electric current judgment module is configured as judging whether the output current value of any collector-shoe gear is equal to zero；
Wherein, the fault determination module is additionally configured to the null situation of output current value in any collector-shoe gear Under, determine the output open circuit of any collector-shoe gear or the high level-one of the output electric current for accessing any collector-shoe gear The input branch circuit break of collector-shoe gear.
12. device according to claim 11, which is characterized in that the electric current judgment module is configured as according to described point Grade bus structure judges the output current value of each collector-shoe gear from highest collector-shoe gear to first order collector-shoe gear step by step Whether zero is equal to.
13. device according to claim 12, which is characterized in that described device further include: period setup module is configured For measurement period is arranged；
The acquisition module is configured as in each measurement period, by the way that the first order collector-shoe gear output end is arranged in Current detection circuit acquires and adds up output current value of the first order collector-shoe gear in each measurement period, obtains described Accumulative output current value of the first order collector-shoe gear in each measurement period；
The statistical module is configured as the accumulative output electric current according to the first order collector-shoe gear in each measurement period Value and the classification bus structure, count accumulative output current value of each collector-shoe gear in each measurement period；
The electric current judgment module is configured as according to the classification bus structure, is converged from highest collector-shoe gear to the first order Device, judges whether accumulative output current value of each collector-shoe gear in each measurement period is equal to zero step by step.
14. device according to claim 12, which is characterized in that the acquisition module is configured as by being arranged described It is real-time at the current detection moment that the current detection circuit of first order collector-shoe gear output end acquires the first order collector-shoe gear Output current value obtains the first order collector-shoe gear in the real-time output current value at current detection moment；
The statistical module is configured as the real-time output current value according to the first order collector-shoe gear at the current detection moment And the classification bus structure, each collector-shoe gear is counted in the real-time output current value at current detection moment；
The electric current judgment module is configured as according to the classification bus structure, is converged from highest collector-shoe gear to the first order Device, judges whether each collector-shoe gear is equal to zero in the real-time output current value at current detection moment step by step.
15. device according to claim 12, which is characterized in that it is described classification bus structure in collector-shoe gear level from High sequence on earth are as follows: fourth stage collector-shoe gear, third level collector-shoe gear, second level collector-shoe gear, first order collector-shoe gear；
The electric current judgment module includes:
Level Four electric current judging submodule, is configured as judging whether the output current value of fourth stage collector-shoe gear is equal to zero；
Three-level selects submodule, is configured as in the case where the output current value of the fourth stage collector-shoe gear is not equal to zero, From the third level collector-shoe gear that the fourth stage collector-shoe gear accesses, any one third level collector-shoe gear is selected；
Tertiary current judging submodule is configured as judging that the output current value of any one selected third level collector-shoe gear is It is no to be equal to zero；
Second level selects submodule, is configured as being not equal to zero feelings in the output current value of any one third level collector-shoe gear Under condition, from the second level collector-shoe gear that any one described third level collector-shoe gear accesses, any one second level confluence dress is selected It sets；
Secondary current judging submodule is configured as judging that the output current value of any one selected second level collector-shoe gear is It is no to be equal to zero；
Primary current judging submodule is configured as the output current value in any one second level collector-shoe gear not equal to zero In the case where, whether the output current value of each first order collector-shoe gear of judgement any one second level collector-shoe gear access Equal to zero；
Second level gravity treatment submodule, if being configured as the second level collector-shoe gear of any one third level collector-shoe gear access In, there are also the whether null second level collector-shoe gear of output current value is not judged, it is not judged output current value from described Whether any one second level collector-shoe gear, secondary current described in retriggered are reselected in null second level collector-shoe gear Judging submodule executes the whether null step of the output current value for judging any one selected second level collector-shoe gear Suddenly；
Three-level gravity treatment submodule, if being configured as the second level collector-shoe gear of any one third level collector-shoe gear access In, there is no the whether null second level collector-shoe gear of output current value is not judged, being never judged output current value is Any one third level collector-shoe gear is reselected in no null third level collector-shoe gear, tertiary current described in retriggered is sentenced Disconnected submodule executes the whether null step of the output current value for judging any one selected third level collector-shoe gear；
Wherein, the difference calculating module is configured as finding out any one second level remittance in the maximum value searching module After flowing the output current maxima in each first order collector-shoe gear of device access, it is not equal to for each output current value Zero first order collector-shoe gear calculates the output of the output current value maximum value Yu targeted first order collector-shoe gear one by one The difference of current value；
The fault determination module is configured as being not equal to for each output current value zero first order collector-shoe gear, described The ratio of difference and the output current maxima is greater than or equal to the number of targeted first order collector-shoe gear input branch Inverse in the case where, determine that targeted first order collector-shoe gear has input branch circuit break.
16. a kind of photovoltaic power generation input circuit fault detection system characterized by comprising
Photovoltaic power generation input circuit, wherein the photovoltaic power generation input circuit is using classification bus structure, wherein the classification Collector-shoe gear in bus structure for accessing photovoltaic module output electric current is first order collector-shoe gear, for accessing described first The collector-shoe gear of the output electric current of grade collector-shoe gear is second level collector-shoe gear, each the of the access of same second level collector-shoe gear The number for the input branch that level-one collector-shoe gear is respectively connected to is identical and photovoltaic module design parameter is identical；
The current detection circuit of the first order collector-shoe gear output end is set；
At data using the photovoltaic power generation input circuit fault detection method as described in any one of claim 1-9 claim Manage device.
17. system according to claim 16, which is characterized in that the system also includes:
Data collector is configured as summarizing the collected output current value of each current detection circuit, after summarizing Output current value be transferred to the data processing equipment.
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