KR101874857B1 - Fault monitoring apparatus for solar cell and operating method thereof - Google Patents

Fault monitoring apparatus for solar cell and operating method thereof Download PDF

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KR101874857B1
KR101874857B1 KR1020180018285A KR20180018285A KR101874857B1 KR 101874857 B1 KR101874857 B1 KR 101874857B1 KR 1020180018285 A KR1020180018285 A KR 1020180018285A KR 20180018285 A KR20180018285 A KR 20180018285A KR 101874857 B1 KR101874857 B1 KR 101874857B1
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solar cell
solar
failure
value
output current
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KR1020180018285A
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Korean (ko)
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송기봉
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주식회사 비젼코스모
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/185—Electrical failure alarms
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Abstract

A fault monitoring apparatus for a solar cell and an operation method thereof are disclosed. The present invention determines whether or not each solar cell is faulty based on the output current value of a plurality of solar cells constituting the solar cell module, and outputs a result of the determination through a display, , It is possible to provide a failure monitoring apparatus and a method of operating the same for a solar cell capable of enabling an administrator to quickly perform replacement and repair.

Description

TECHNICAL FIELD [0001] The present invention relates to a fault monitoring apparatus for a solar cell,

The present invention relates to an apparatus and method for monitoring the failure of each solar cell based on an output current value of a plurality of solar cells constituting the solar cell module.

In recent years, as the interest in environmentally friendly energy, not fossil fuel based energy, has increased as a result of fine dust or global warming, the introduction of solar power generation facilities is increasing.

In large enterprises, schools, factories, etc. are building power generation systems for photovoltaic power generation to meet electric power demand. Smaller power generation systems are being built in the home by constructing photovoltaic power generation systems.

As the interest in solar power increases, the importance of monitoring the PV system is increasing.

The photovoltaic power generation system is operated in such a manner that a solar cell module composed of a plurality of solar cells is provided outside and then power generation is performed based on sunlight incident on the solar cell.

Since the performance of the solar cells is important for the PV system, it is necessary to introduce a technology to monitor whether or not the failure occurs in the solar cells.

However, in the conventional solar power generation monitoring system, there is no technology for monitoring the state of each of a plurality of solar cells constituting the solar cell module, so that even if an abnormality occurs in a specific solar cell, There is a problem that the efficiency of solar power generation is lowered because maintenance or replacement can not be performed.

Therefore, it is necessary to study a monitoring technique that can monitor the state of each of a plurality of solar cells constituting the solar cell module.

The present invention determines whether or not each solar cell is faulty based on the output current value of a plurality of solar cells constituting the solar cell module, and outputs a result of the determination through a display, The present invention provides a fault monitoring apparatus and a method of operating the same for a solar cell capable of enabling an administrator to quickly perform replacement and repair.

The fault monitoring apparatus for a solar cell according to an exemplary embodiment of the present invention includes a sensing device for sensing an output current value of each of a plurality of solar cells constituting a solar cell module installed in a solar power generation system, A plurality of photovoltaic cells connected to the plurality of photovoltaic cells, the photovoltaic cells including a plurality of photovoltaic cells, each photovoltaic cell including a plurality of photovoltaic cells, A candidate selection unit for selecting a solar cell which is identified as a failure candidate among the solar cells as a failure candidate; and a selection unit for selecting, as a failure candidate, the first solar cell of the plurality of solar cells, Of the plurality of solar cells, the output current value of the remaining solar cells If it is confirmed that the first solar battery cell is out of the reference range value determined to determine whether the solar cell is faulty from the average value of the output current values of the first solar cell, And an output unit for outputting a failure guiding message indicating that the first solar cell is faulty, if the first solar cell is determined to be faulty, through a display.

A method of operating a fault monitoring apparatus for a solar cell according to an embodiment of the present invention includes sensing a current value of each of a plurality of solar cells constituting a solar cell module installed in the solar power generation system, The method comprising: receiving an output current value of each of the plurality of solar cells from an apparatus; comparing the output current value of each of the plurality of solar cells with a data comparison based on an output current value of each of the plurality of solar cells Selecting a photovoltaic cell identified as a failure candidate among the plurality of photovoltaic cells through a plurality of photovoltaic cells as a failure candidates, if the first photovoltaic cell of the plurality of photovoltaic cells is selected as the failure candidate, Wherein the output current value of the solar cell is the remaining solar cells, and the remaining solar cells are connected to the plurality of solar cells If it is confirmed that the photovoltaic cell deviates from the reference range value determined to determine whether the photovoltaic cell is faulty from the average value of the output current values of the photovoltaic cells excluding the first photovoltaic cell, And outputting a failure guiding message indicating that the first solar cell is broken through a display when the first solar cell is judged to have a failure.

The present invention determines whether or not each solar cell is faulty based on the output current value of a plurality of solar cells constituting the solar cell module, and outputs a result of the determination through a display, , It is possible to provide a failure monitoring apparatus and a method of operating the same for a solar cell capable of enabling an administrator to quickly perform replacement and repair.

1 is a diagram illustrating a structure of a fault monitoring apparatus for a solar cell according to an embodiment of the present invention.
2 is a flowchart illustrating an operation method of a failure monitoring apparatus for a solar cell according to an exemplary embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the description is not intended to limit the invention to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals in the drawings are used for similar elements and, unless otherwise defined, all terms used in the specification, including technical and scientific terms, are to be construed in a manner that is familiar to those skilled in the art. It has the same meaning as commonly understood by those who have it.

1 is a diagram illustrating a structure of a fault monitoring apparatus for a solar cell according to an embodiment of the present invention.

Referring to FIG. 1, a fault monitoring apparatus 110 for a solar cell according to the present invention includes a receiving unit 111, a candidate selecting unit 112, a failure determining unit 113, and an output unit 114.

First, in order to operate the fault monitoring device 110 for a solar cell, an output current value of each solar cell is set to a plurality of solar cells constituting the solar cell module installed in the solar power generation system And a sensing device 131 for sensing may be connected.

At this time, the receiving unit 111 receives from the sensing device 131 sensing the output current value of each of the plurality of solar cells constituting the solar cell module installed in the solar power generation system, Lt; / RTI >

When the output current value of each of the plurality of solar cells is received, the candidate selecting unit 112 selects the possibility of failure among the plurality of solar cells through data comparison based on the output current value of each of the plurality of solar cells Is selected as a failure candidate.

The candidate selecting unit 112 may include a vector generating unit 115, a distance averager 116, and a selecting unit 117 according to an embodiment of the present invention.

When the output current value of each of the plurality of solar cells is received, the vector generating unit 115 supplies the output current value of each of the plurality of solar cells other than the corresponding solar cell as a component .

For example, the plurality of solar cells may be referred to as a 'solar cell 1', a 'solar cell 2', and a 'solar cell 3', an output current value of 'solar cell 1' And the output current value of the cell 2 'is' b', and the output current value of the solar cell 3 'is' c', the vector generation unit 115 calculates the output current value of the solar cell 1 ' (B, c) 'having the output current values of the photovoltaic cell 2' and the photovoltaic cell 3 'as components can be generated, and the photovoltaic cell 3' and the photovoltaic cell 3 ' (C, a) 'having the output current value of the solar cell 1' as a component can be generated, and the 'solar cell 1' and the 'solar cell 2' can be generated for the 'solar cell 3' (A, b) " having an output current value of " (a, b) "

According to an embodiment of the present invention, in order to determine the arrangement order of the components included in the vector generated for each of the plurality of solar cells, Wherein when an output current value is received, an order number for distinguishing each output current value is assigned to an output current value of each of the plurality of solar cells, and for each of the plurality of solar cells, The method comprising: generating a vector including an output current value of a solar cell as a component, wherein an arrangement order of output current values included as components in each vector corresponds to an output current value corresponding to a next sequential number assigned to an output current value of the solar cell Can be configured according to the order assigned to each output current value starting from the output current value.

In this regard, the operation of the vector generating unit 115 will be described with reference to the above-described example. The vector generating unit 115 calculates the output current value 'a' as '1 order number' and the output current value 'b' Quot ;, and " 3 order numbers " to the output current value 'c'.

Then, the vector generating unit 115 generates a vector having the output current values of the solar cell 2 and the solar cell 3 as components, with respect to the solar cell 1, B 'and' c 'starting from' b 'which is the output current value corresponding to' 2 sequence number 'which is the next sequence of' 1 sequence number 'assigned to' a ' (B, c) 'can be finally generated by constructing the arrangement order of the components included in the vector according to the following equation.

 The vector generating unit 115 generates a vector having the output current values of the solar cell 1 and the solar cell 3 as components of the solar cell 2, C 'and' a ', starting from' c 'which is the output current value corresponding to' 3 sequence number 'which is the next sequence number of' 2 sequence number 'assigned to' b ' By constructing the arrangement order of the components included in the vector, a vector finally called '(c, a)' can be generated.

Here, since the next sequence number of the '3 sequence number', which is the sequence number assigned to the output current value 'c', no longer exists, the vector generation unit 115 generates the vector of the components included in the vector for the solar cell 2 When determining the arrangement order, an output current value 'a' to which '1 order number' is assigned in the next order of the output current value 'c' can be arranged in a circulating manner.

The vector generating unit 115 generates a vector having the output current values of the solar cell 1 and the solar cell 2 as components of the solar cell 3, A 'and' b ', starting from' a ', which is the output current value corresponding to' 1 order number 'which is the next order of' 3 order number 'assigned to' c ' By constructing the arrangement order of the components included in the vector, a vector finally called '(a, b)' can be generated.

According to the above procedure, the generated vectors for 'solar cell 1', 'solar cell 2', and 'solar cell 3' can be summarized as shown in Table 1 below.

A plurality of solar cells vector Solar cell 1 (b, c) Solar cell 2 (c, a) Solar cell 3 (a, b)

When a vector is generated for each of the plurality of solar cells, the distance averaging unit 116 computes the Euclidean distance between the vector of the corresponding solar cell and the vector of the other solar cells with respect to each of the plurality of solar cells And calculates the average value of the calculated Euclidean distance.

Here, the Euclidean distance means a distance between two vectors and can be calculated according to the following equation (1).

Figure 112018016198356-pat00001

Where D is the Euclidean distance, and p i and q i are the i-th components included in the two vectors. In general, the smaller the Euclidean distance between two vectors, the more similar the two vectors are. As the Euclidean distance between two vectors increases, the two vectors become non-similar.

The operation of the distance averaging unit 116 will now be described using the example described above. The distance averaging unit 116 first calculates the distance a 'from the solar cell 1' ) "and" sun "vector for" the battery cell 2 (c, a), the Euclidean distance between the "D 12" calculates a and 'vector for "the solar battery cell 1 (b, c)" and "solar cell It is possible to calculate the average value of 'D 12 ' and 'D 13 ' after calculating the Euclidean distance 'D 13 ' between the vector '(a, b)' for cell 3 '.

(C, a) 'for the solar cell 2' and the vector '(b, c) for the solar cell 1' with respect to the 'solar cell 2'"Euclidean distance between the" D 21 "operation to, and 'vector for" the solar cells 2 (c, a)' and 'vector for "the solar cells 3, the Euclidean distance between the" (a, b) D 23 'and then calculate the average value of' D 21 'and' D 23 '.

(A, b) 'for the solar cell 3' and the vector '(b, c) for the solar cell 1' with respect to the 'solar cell 3' And calculates the Euclidean distance D 31 between the vector 'a', b 'for the solar cell 3' and the vector 'c' for the solar cell 2 ' 32 'and then calculate the average value of' D 31 'and' D 32 '.

When the average value of the Euclidean distances for each of the plurality of solar cells is calculated, the selecting unit 117 selects a solar cell whose average value of Euclidean distances is the smallest among the plurality of solar cells, Select it as a battery cell.

The operation of the selection unit 117 will be described with reference to the above example. The operation of the selection unit 117 will be described with respect to the operation of the solar cell 1 'among the solar cell 1', the solar cell 2 ', and the' solar cell 3 ' If the average value of the Euclidean distances has become minimum, the selection unit 117 can select 'solar cell 1' as the solar cell corresponding to the failure candidate.

The Euclidean distance means the distance between the two vectors. The mean value of the Euclidean distance to the solar cell 1 is the minimum. The Euclidean distance between (b, c) and (c, a) (c, a) 'and' (c, a) 'between Euclidean distance between' (c, a) Euclidean distances between '(a, b)' and '(c, a)' between the Euclidean distance between 'a, b' The output current value of 'a' among the output current values 'a', 'b' and 'c' is significantly different from that of 'b' and 'c' The output current value of 'a' has a value significantly different from that of 'b' and 'c' in that it is a result that can only be obtained when there is a difference in the output current.

The fact that the output current value 'a' is significantly different from the other output current values indicates that the 'solar cell 1' is relatively abnormal compared with the 'solar cell 2' and the 'solar cell 3' The selection unit 117 can select 'solar cell 1' as the solar cell corresponding to the failure candidate.

In this manner, if the first solar cell among the plurality of solar cells is selected as the failure candidate through the candidate selection unit 112, the failure determination unit 113 determines that the output current value of the first solar cell is In order to determine whether the solar cell is faulty from the average value of the output current values of the remaining solar cells (the remaining solar cells are the solar cells excluding the first one among the plurality of solar cells) And determines that the first solar cell is out of order if it is confirmed that the measured value is out of the set reference range value.

According to an embodiment of the present invention, the failure determination unit 113 may include a weight table holding unit 118, a reference range determination unit 119, and a determination unit 120.

The weight table holding unit 118 stores and holds a weight table in which different weights are recorded corresponding to a plurality of predetermined ranges of illumination intensity values.

In this connection, information may be recorded in the weight table as shown in Table 2 below.

Different illuminance value ranges Different weights 0 to 200 lx One 200-1000 lx 1.1 1000 ~ 1500lx 1.2 ... ...

When the first solar cell among the plurality of solar cells is selected as the failure candidate, the reference range determination unit 119 determines whether the first solar cell is the failure candidate, Receives the current illumination value from the device 132, extracts the recorded first weight value corresponding to the illumination value range to which the current illumination value belongs on the weight table, multiplies the selected basic value by the first weight value The reference range value for determining whether the solar cell is faulty or not is determined.

For example, when the selected basic range value is '-5A to + 5A' and the current illuminance value received from the illuminance sensing device 132 is '250lx', the reference range determination unit 119 determines Quot; 1.1 " corresponding to the illuminance value range to which the current illuminance value '250lx' belongs is extracted with reference to the weight table such as '1.1A' Quot; to " -5.5A to + 5.5A ".

Here, the illuminance sensing device 132 may be a stand alone device separate from the sensing device 131 as shown in FIG. 1, and may be coupled with the sensing device 131 to enable illumination sensing in one device .

If it is determined that the output current value of the first solar battery cell deviates from the reference range value from the average value of the output current values of the remaining solar battery cells when the reference range value is determined, The first solar battery cell is judged as a failure.

For example, when the output current value of the first solar cell is '15A', the average value of the output current values of the remaining solar cells is '25A', and the reference range value is -5.5A to + 5.5A The determination unit 120 determines that the first solar cell is out of order because the output current value of the first solar cell deviates from the average value of 25A to -5.5 A to +5.5 A It can be judged.

The output unit 114 outputs a failure information message indicating that the first solar battery cell has failed if the first solar battery cell is determined as a failure.

According to an embodiment of the present invention, the failure monitoring apparatus 110 for a solar cell may further include a failure severity table retaining unit 121 and a failure severity extracting unit 122.

The failure severity table holding unit 121 stores and maintains a failure severity table in which information on failure severities of different grades is recorded corresponding to a plurality of different current value ranges.

In this regard, in the failure severity table, information may be recorded as shown in Table 3 below.

Different current value ranges Different failure severities 6-10A caution 10 ~ 15A warning 15A to 20A serious ... ...

The failure severity extractor 122 calculates an absolute value of the difference between the average value of the output current values of the remaining solar cells and the output current value of the first solar cell when the first solar battery cell is determined as failure And information on the first failure severity recorded corresponding to the current value range to which the absolute value belongs is extracted on the failure severity table.

For example, when the absolute value is calculated as '12A', the failure severity extracting unit 122 extracts a 'warning' that corresponds to the range of the current value to which the absolute value belongs from the failure severity table as shown in Table 3 Information about the severity of the failure.

When the extraction of the information on the first failure severity is completed, the output unit 114 outputs the information on the first failure severity along with the failure notification message indicating that the first solar cell is broken, .

According to an embodiment of the present invention, the failure severity extracting unit 122 may include a failure history database 123, an absolute value computing unit 124, an adjusting unit 125, and an extracting unit 126.

The failure history database 123 stores information on the number of times of occurrence of failures in the past predetermined period for each of the plurality of solar cells.

For example, if the past predetermined period is referred to as 'past three months', information may be stored in the failure history database 123 as shown in Table 4 below.

A plurality of solar cells Number of failures in the past 3 months Solar cell 1 5 times Solar cell 2 3rd time Solar cell 3 1 time ... ...

The absolute value calculator 124 calculates the absolute value of the difference between the average value of the output current values of the remaining solar cells and the output current value of the first solar cell when the first solar cell is determined to be faulty .

The adjustment unit 125 checks whether or not the number of occurrences of failures stored in the first solar battery cell exceeds the predetermined reference number on the failure history database 123, When it is determined that the number of failures stored in the battery cell exceeds the predetermined reference number, the magnitude of the absolute value is adjusted by multiplying the absolute value by the selected weight.

For example, the first solar cell determined as a failure is referred to as a "solar cell 1", the selected reference number is "3 times", the selected additional weight is "1.3", the absolute value is "12A" The adjustment unit 125 determines that the number of failures stored in the 'solar cell 1' exceeds the predetermined reference number on the failure history database 123 shown in Table 4, 'May be multiplied by the selected weighting factor' 1.3 'to adjust the magnitude of the absolute value to' 15 .6A '.

Thereafter, the extraction unit 126 extracts information on the first failure severity recorded in the failure severity table in correspondence with the current value range to which the absolute value belongs.

That is, in the case where the solar cell determined to have a failure already has a failure history several times in the past, the failure severity extracting unit 122 according to the present invention multiplies the absolute value for confirming the failure severity by a predetermined additional weight , Information on a higher failure severity can be extracted from the failure severity table.

2 is a flowchart illustrating an operation method of a failure monitoring apparatus for a solar cell according to an exemplary embodiment of the present invention.

In step S210, an output current value of each of the plurality of solar cells is received from a sensing device sensing the output current value of each of the plurality of solar cells constituting the solar cell module installed in the solar power generation system.

In step S220, when the output current value of each of the plurality of solar cells is received, data comparison based on the output current value of each of the plurality of solar cells identifies a possibility Is selected as a failure candidate.

In step S230, if the first solar cell of the plurality of solar cells is selected as the failure candidate, the output current value of the first solar cell is the sum of the output current values of the remaining solar cells If it is confirmed that the photovoltaic cell is out of the reference range value determined for determining the failure of the solar cell from the average value of the output current values of the photovoltaic cells, The battery cell is judged as a failure.

In step S240, if it is determined that the first solar battery cell has failed, a failure information message indicating that the first solar battery cell is failed is displayed through a display.

At this time, according to an embodiment of the present invention, when the output current value of each of the plurality of solar cells is received in step S220, for each of the plurality of solar cells, Generating a vector for each of the plurality of solar cells, generating, for each of the plurality of solar cells, a vector including the output current value of the cells as a component, Calculating the average value of the calculated Euclidean distances after calculating the Euclidean distances between the vectors of the cells and calculating an average value of Euclidean distances for each of the plurality of solar cells, And selecting a solar cell cell having a minimum average value of the solar cell cells corresponding to the failure candidates.

According to an embodiment of the present invention, in step S230, a weight table in which different weights are recorded corresponding to a plurality of predetermined ranges of different illumination intensity values is stored and maintained, Wherein when the first solar cell of the cells is selected as the failure candidate, the current illumination value is received from the illumination intensity sensing device for sensing the current illumination intensity of the region where the solar battery is installed, Determining a reference range value for determining whether the solar cell is faulty by multiplying the first weighted value by the first weighted value by extracting the recorded first weighted value corresponding to the range of the illuminance value to which the current illumination value belongs, And the output current value of the first solar battery cell is larger than the output current value of the first solar battery cell, If from the mean value of the output current values of positive cells are found to be outside the reference range values, it may comprise determining the first solar cell to malfunction.

According to an embodiment of the present invention, an operation method of the fault monitoring apparatus for the solar cell is characterized in that information on different levels of failure severity is recorded in correspondence with a plurality of selected current value ranges Storing a failure severity table and storing the failure severity table; and determining, when the first solar battery cell is failed, an absolute value of a difference between an average value of output current values of the remaining solar battery cells and an output current value of the first solar battery cell And extracting information on a first failure severity recorded in the failure severity table in correspondence with a current value range to which the absolute value belongs.

At this time, in step S240, information on the first failure severity may be output through the display together with the failure notification message indicating that the first solar cell is faulty.

According to an embodiment of the present invention, the step of extracting information on the first failure severity may include storing information on the number of times of occurrence of failures in the past predetermined period for each of the plurality of solar cells Calculating an absolute value of a difference between an average value of output current values of the remaining solar cells and an output current value of the first solar cell when the first solar cell is determined to be in failure; , Checking whether or not the number of times of occurrence of failures stored in the first solar cell on the failure history database exceeds a predetermined reference number and storing the number of failures stored in the failure history database on the first solar cell If it is confirmed that the number of occurrences of the fault exceeds the predetermined reference number, And adjusting the magnitude of the absolute value by multiplying the magnitude of the absolute value by a predetermined additional weight, and extracting information on the recorded first failure severity corresponding to the range of the current value to which the absolute value belongs in the failure severity table .

The operation of the fault monitoring apparatus for the solar cell according to the embodiment of the present invention has been described with reference to FIG. Here, the operation method of the fault monitoring apparatus for the solar cell according to the embodiment of the present invention can correspond to the operation of the fault monitoring apparatus 110 for the solar cell explained with reference to FIG. 1, A detailed description thereof will be omitted.

The method of operating the fault monitoring device for a solar cell according to an embodiment of the present invention may be implemented by a computer program stored in a storage medium for execution through a combination with a computer.

In addition, the method of operating the fault monitoring apparatus for a solar cell according to an exemplary embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

110: Fault monitoring device for solar cell
111: Receiver 112: Candidate selector
113: failure determination unit 114: output unit
115: vector generation unit 116:
117: selection unit 118: weight table holding unit
119: Reference range determination unit 120:
121: Failure severity table holding unit 122: Failure severity extracting unit
123: failure history database 124: absolute value operation unit
125: adjusting unit 126:
131: sensing device
132: Roughness sensing device

Claims (12)

A receiving unit for receiving an output current value of each of the plurality of solar cells from a sensing device sensing an output current value of each of a plurality of solar cells constituting a solar cell module installed in the solar power generation system;
A plurality of photovoltaic cells connected to the plurality of photovoltaic cells, and a plurality of photovoltaic cells connected to the photovoltaic cells, A candidate selecting unit for selecting a cell as a failure candidate;
Wherein when the first solar cell of the plurality of solar cells is selected as the failure candidate, the output current value of the first solar cell is the remaining solar cells, If it is confirmed that the first solar battery cell is out of the reference range value determined to determine whether the solar cell is faulty from the average value of the output current values of the first solar cell, A fault judging unit for judging; And
And outputting a failure guidance message indicating that the first solar cell is faulty, through a display, when the first solar cell is determined to be faulty,
Lt; / RTI >
The candidate selector
A vector generating unit for generating a vector including an output current value of each of the plurality of solar cells other than the corresponding solar cell as a component when the output current value of each of the plurality of solar cells is received; part;
Wherein when a vector is generated for each of the plurality of solar cells, a Euclidean distance between a vector of the solar cell and a vector of other solar cells is calculated for each of the plurality of solar cells, A distance average operation unit for calculating an average value; And
A selection unit for selecting a solar cell cell having the smallest average value of the Euclidean distances among the plurality of solar cells as a solar cell corresponding to the failure candidate when the average value of the Euclidean distances for each of the plurality of solar cells is calculated,
And a fault monitoring device for monitoring the fault of the solar cell. delete The method according to claim 1,
The malfunction determination unit
A weight table holding unit for storing and holding a weight table in which different weights are recorded corresponding to a plurality of predetermined ranges of illumination intensity values;
When the first solar cell among the plurality of solar cells is selected as the failure candidate, receives the current illuminance value from the illuminance sensing device that performs sensing of the current illuminance of the region where the solar power generation system is installed For extracting a recorded first weight corresponding to a range of illumination values to which the current illumination value belongs, and for multiplying the selected basic range value by the first weight to determine whether the solar cell is faulty, A reference range determination unit for determining a reference range value; And
If it is determined that the output current value of the first solar battery cell deviates from the reference range value from the average value of the output current values of the remaining solar battery cells when the reference range value is determined, A judgment unit
And a fault monitoring device for monitoring the fault of the solar cell. The method of claim 3,
A failure severity table retaining unit for storing and maintaining a failure severity table in which information on failure severities of different grades is recorded corresponding to a plurality of selected current value ranges; And
Calculating an absolute value of a difference between an average value of output current values of the remaining solar cells and an output current value of the first solar cell when the first solar cell is determined to be in failure, A failure severity extracting unit for extracting information on a recorded first failure severity corresponding to a current value range to which an absolute value belongs,
Further comprising:
The output
And outputs information on the first failure severity through the display together with the failure notification message indicating that the first solar cell is faulty. 5. The method of claim 4,
The failure severity extracting unit
A failure history database in which information on the number of failures occurring in the past predetermined period for each of the plurality of solar cells is stored;
An absolute value operation unit for calculating an absolute value of a difference between an average value of output current values of the remaining solar cells and an output current value of the first solar cell when the first solar cell is determined to be in failure;
Wherein the failure history database is configured to check whether or not the number of failures stored in the first solar battery cell exceeds a predetermined reference number on the failure history database, An adjusting unit for adjusting the magnitude of the absolute value by multiplying the absolute value by a predetermined additional weight when it is determined that the number of times exceeds the predetermined reference number; And
An extraction unit for extracting information on the first failure severity recorded in the failure severity table in correspondence with a current value range to which the absolute value belongs;
And a fault monitoring device for monitoring the fault of the solar cell. Receiving an output current value of each of the plurality of solar cells from a sensing device sensing an output current value of each of a plurality of solar cells constituting a solar cell module installed in the solar power generation system;
A plurality of photovoltaic cells connected to the plurality of photovoltaic cells, and a plurality of photovoltaic cells connected to the photovoltaic cells, Selecting a cell as a failure candidate;
Wherein when the first solar cell of the plurality of solar cells is selected as the failure candidate, the output current value of the first solar cell is the remaining solar cells, If it is confirmed that the first solar battery cell is out of the reference range value determined to determine whether the solar cell is faulty from the average value of the output current values of the first solar cell, ; And
And outputting a failure guiding message indicating that the first solar cell is faulty if the first solar cell is judged to be faulty through a display
Lt; / RTI >
The step of selecting as the failure candidate
Generating a vector including an output current value of each of the plurality of solar cells other than the corresponding solar cell as an element when an output current value of each of the plurality of solar cells is received;
Wherein when a vector is generated for each of the plurality of solar cells, a Euclidean distance between a vector of the solar cell and a vector of other solar cells is calculated for each of the plurality of solar cells, Calculating an average value; And
Selecting a solar cell cell having a minimum average Euclidean distance among the plurality of solar cells as a solar cell corresponding to the failure candidate when an average value of Euclidean distances for each of the plurality of solar cells is calculated,
The method comprising the steps of: delete The method according to claim 6,
The determining step
Storing and maintaining a weight table in which different weights are recorded corresponding to a plurality of predetermined ranges of illumination intensity values;
When the first solar cell among the plurality of solar cells is selected as the failure candidate, receives the current illuminance value from the illuminance sensing device that performs sensing of the current illuminance of the region where the solar power generation system is installed For extracting a recorded first weight corresponding to a range of illumination values to which the current illumination value belongs, and for multiplying the selected basic range value by the first weight to determine whether the solar cell is faulty, Determining a reference range value; And
If it is determined that the output current value of the first solar battery cell deviates from the reference range value from the average value of the output current values of the remaining solar battery cells when the reference range value is determined, Step to judge as failure
The method comprising the steps of: 9. The method of claim 8,
Storing and maintaining a failure severity table in which information on failure severities of different classes is recorded corresponding to a plurality of selected current value ranges; And
Calculating an absolute value of a difference between an average value of output current values of the remaining solar cells and an output current value of the first solar cell when the first solar cell is determined to be in failure, Extracting information on the recorded first failure severity corresponding to the current value range to which the absolute value belongs
Further comprising:
The outputting step
And outputting the information on the first failure severity along with the failure notification message indicating that the first solar cell is broken through the display. 10. The method of claim 9,
The step of extracting information on the first failure severity
Maintaining a failure history database in which information on the number of times of occurrence of failures in the past predetermined period for each of the plurality of solar cells is stored;
Calculating an absolute value of a difference between an average value of output current values of the remaining solar cells and an output current value of the first solar cell when the first solar cell is determined to be faulty;
Wherein the failure history database is configured to check whether or not the number of failures stored in the first solar battery cell exceeds a predetermined reference number on the failure history database, Adjusting the magnitude of the absolute value by multiplying the absolute value by a weighted addition weight if it is determined that the number of times exceeds the predetermined reference number; And
Extracting information on the first failure severity recorded in correspondence with the current value range to which the absolute value belongs on the failure severity table;
The method comprising the steps of: A computer-readable recording medium recording a program for performing the method of any one of claims 6, 8, 9, and 10. A computer program stored in a storage medium for executing the method of any one of claims 6, 8, 9, or 10 through a combination with a computer.
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