KR20160052954A - System, apparatus and method for diagnosing sollar cell power generation - Google Patents

Abstract

The present invention relates to a system, an apparatus, and a method for diagnosing a solar cell power generation, which provide an accurate replacement basis with respect to a solar cell module unit to be replaced through diagnosis of each module unit. According to an embodiment of the present invention, the system for diagnosing the solar cell power generation comprises: a plurality of solar cell module units which are grouped into replaceable units; a connection board which receives a DC signal outputted from each of the plurality of solar cell module units and outputs the received DC signal; an inverter which receives an output signal of the connection board and converts the output signal into an AC signal; a sensor unit which senses solar radiation or illuminance and a temperature; and a diagnosis unit which stores reference output data according to the solar radiation or illuminance and the temperature of each of the solar cell module units, measures performance or efficiency of each of the solar cell module units by comparing output data of each of the solar cell module units, which is received from the connection board, with the reference output data according to a solar radiation or illuminance signal and a temperature signal, which are received from the sensor unit, determines whether each of the solar cell module units is abnormal, and outputs an output state of each of the solar cell module units or the whole solar cell module units, the performance or efficiency of each of the solar cell module units, and the normality or abnormality of each of the solar cell module units.

Description

SYSTEM, APPARATUS AND METHOD FOR DIAGNOSING SOLAR CELL POWER GENERATION,

The present invention relates to a solar cell power generation diagnostic system, apparatus and method. And more particularly, to a solar cell power generation diagnosis system, apparatus, and method capable of diagnosing solar cell module units.

Recently, interest in renewable energy has been growing, and among them, solar energy as an alternative energy source is clean energy and has an infinite amount, and its use has recently been greatly increased.

Considering that solar power generation needs to be maintained for a long period of time despite the fact that it is a solar power generation system, it is necessary to maintain the maintenance of the solar power generation system There is a problem to be done by the user himself. In addition, it is difficult for the user who lacks expert knowledge in the case of the failure of the photovoltaic power generation system to have difficulty in identifying the cause, and the post processing ability is poor, and it is difficult to understand the current state due to limited information provision of the photovoltaic power generation system. In addition, even when the lifetime of the solar cell module is partially replaced, the cost of replacing the expensive solar cell module due to the batch replacement is burdensome to the user, even if the remaining solar cell module has performance similar to the performance before shipment.

Accordingly, it is necessary to provide a user with an easy-to-use and easy-to-operate product and to provide an accurate replacement ground for the solar cell module to be replaced.

Korean Patent Publication No. 10-2012-0019637 (published on March 7, 2012)

In order to solve the above-described problems, the present invention provides a solar cell power generation diagnostic system, apparatus, and method for providing accurate replacement grounds for a solar cell module unit to be replaced through diagnosis of each solar cell module unit.

According to one aspect of the present invention, there is provided a solar cell module module comprising: a plurality of solar cell module units that receive light energy and convert the solar cells into electric energy, the solar cell modules being grouped into replaceable units; A connection unit for receiving and outputting a direct current signal output from a plurality of solar cell module units; An inverter for receiving an output signal of the connection module, converting the signal into an AC signal, and outputting the AC signal to a load or a power system; A sensor unit for sensing a solar radiation amount or an illuminance, and a temperature; And reference output data according to temperature, receives the solar radiation amount or illuminance and the temperature signal sensed from the sensor unit, and outputs the output intensity of each solar cell module unit from the connection module And compares the received output data for each solar cell module unit with the reference output data according to the received solar radiation amount or illuminance and the temperature signal to measure the performance or efficiency of each solar cell module unit, And a diagnostic unit for determining whether or not the unit is abnormal and outputting the performance or efficiency of each solar cell module unit, the output state of each solar cell module unit, the performance or efficiency of each solar cell module unit, and the abnormality.

Next, in order to achieve the above object, according to another aspect of the present invention, there is provided a sensor unit for sensing a solar radiation amount, an illuminance, and a temperature; A storage unit for storing reference output data according to a temperature or an illuminance of each of the plurality of solar cell module units, and a temperature; A receiving unit for receiving an output intensity of each solar cell module unit sensed from a DC signal output of a plurality of solar cell module units grouped into replaceable units; The output data of each solar cell module unit provided from the receiving unit is compared with the reference output data stored in the storage unit in accordance with the solar radiation amount or the illuminance sensed by the sensor unit and the temperature signal to measure the performance or efficiency of each solar cell module unit, An MCU unit for determining whether or not each solar cell module unit is abnormal; A display unit for displaying the output state or performance or efficiency of the solar cell module unit or the entire solar cell module according to the control of the MCU unit according to the setting; And an anomaly output unit for outputting an anomaly signal according to the determination of an anomaly according to the control of the MCU unit according to the setting.

According to another aspect of the present invention, there is provided a photoelectric conversion method for converting light energy into electric signals in a plurality of solar cell module units grouped into replaceable units, A sensing step of sensing a solar radiation amount or an illuminance, and a temperature; A solar cell output receiving step of receiving the output intensity of each solar cell module unit from the DC signal outputted through the photoelectric conversion step; The output data of each solar cell module unit received in the solar cell output receiving step is converted into the solar cell module unit output data in accordance with the solar radiation amount or the illuminance detected in the sensing step and the temperature signal, A diagnostic step of measuring the performance or efficiency of each solar cell module unit and determining whether each solar cell module unit is abnormal based on performance or efficiency; And an output step in which the output state of the solar cell module unit, the measured performance or efficiency is displayed according to the setting, and an abnormal signal is output according to the determination of the abnormality.

According to the embodiment of the present invention, it is possible to provide an accurate replacement reason for the solar cell module unit to be replaced through the diagnosis of each solar cell module unit. In addition, it can cope with the occurrence of a fault by providing the state of the power generation system to a user lacking expertise.

As a result, the additional replacement cost that may be caused by replacement of the solar cell module unit can be reduced. In addition, it is possible to secure reliability for the solar cell power generation system and to spread the solar cell power generation system to the consumer.

It is apparent that various effects not directly referred to in accordance with various embodiments of the present invention can be derived by those of ordinary skill in the art from the various configurations according to the embodiments of the present invention.

1 is a schematic block diagram illustrating a solar cell power generation diagnostic system according to an embodiment of the present invention.
Fig. 2 is a block diagram schematically illustrating one example of the diagnostic unit in Fig. 1 according to one example of the present invention.
3 is a block diagram schematically showing a solar cell power generation diagnostic apparatus according to another embodiment of the present invention.
4 is a flowchart schematically illustrating a solar cell power generation diagnostic method according to another embodiment of the present invention.
5 is a flowchart schematically illustrating a solar cell power generation diagnostic method according to another embodiment of the present invention.
6 is a flowchart schematically illustrating a solar cell power generation diagnostic method according to another embodiment of the present invention.
7 is a flowchart schematically illustrating a solar cell power generation diagnostic method according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the configuration of a first embodiment of the present invention; Fig. In the description, the same reference numerals denote the same components, and a detailed description may be omitted for the sake of understanding of the present invention to those skilled in the art.

As used herein, unless an element is referred to as being 'direct' in connection, combination, or placement with other elements, it is to be understood that not only are there forms of being 'directly connected, They may also be present in the form of being connected, bonded or disposed.

It should be noted that, even though a singular expression is described in this specification, it can be used as a concept representing the entire constitution unless it is contrary to, or obviously different from, or inconsistent with the concept of the invention. It is to be understood that the phrases "including", "having", "having", "comprising", etc. in this specification are intended to be additionally or interchangeable with one or more other elements or combinations thereof.

A solar cell power generation diagnosis system according to an embodiment of the present invention will be described with reference to the drawings.

Figure 1 is a schematic block diagram illustrating a solar cell power generation diagnostic system according to one embodiment of the present invention, Figure 2 schematically illustrates one example of the diagnostic unit in Figure 1 according to one example of the present invention; FIG.

1, a solar cell power generation diagnosis system according to one example includes a plurality of solar cell module units 10, a connection board 30, an inverter 50, a sensor unit 20, and a diagnosis unit 70 . Each configuration will be described in detail with reference to the drawings.

Referring to FIG. 1, a plurality of solar cell module units 10 receive light energy and convert it into electrical energy. The photoelectric conversion of light energy into electric energy is caused in the solar cell module element forming the solar cell module unit 10. At this time, each of the solar cell module elements means one solar cell chip element. For example, the solar cell module unit 10 may preferably mean a unit in which a plurality of solar cell module elements are arrayed. At this time, a plurality of solar cell module units 10 may be grouped or arrayed to form a solar cell unit array 1. [ That is, the solar cell module unit 10 may be, for example, a unit array unit that can be replaced with a unit in which a plurality of solar cell module elements are arrayed. At this time, the plurality of solar cell module units 10, which are replaceable units, can be grouped to form the solar cell unit array 1. [

The solar cell module is a semiconductor device that generates electricity by receiving sunlight. Indicators such as short-circuit current (Isc), open-circuit voltage (Voc), maximum output (Pm), filling rate (FF) and conversion efficiency It is a key factor in determining the performance of the solar cell module and the transaction price in the market. For example, the solar cell performance index can be determined by measuring the current-voltage characteristics of the solar cell module after exposing the solar cell module to light having a specific spectrum and an irradiation intensity specified by the IEC standard.

Since the solar cell module elements, the solar cell module units 10 as their array units, and the solar cell unit array 1 in which the solar cell module units 10 are grouped or arrayed are already well known in the art, Will not be described further.

1, a connection panel 30 is provided in the solar cell power generation diagnosis system. The connection board 30 receives the DC signals output from the plurality of solar cell module units 10 and outputs the signals to the inverter 50. The connection board 30 may collect the signals output from the plurality of solar cell module units 10 and provide the signals to the inverter 50. At this time, the connection module 30 can sense a signal output from each solar cell module unit 10 and provide it to the diagnosis unit 70. [

Next, referring to FIG. 1, an inverter 50 is provided in the solar cell power generation diagnosis system. At this time, the inverter 50 receives the output signal of the connection board 30 and converts it into an AC signal. The inverter 50 outputs the AC signal to a load or a power system (not shown).

For example, in one example, in order to diagnose the overall power generation efficiency, the inverter 50 may detect the total power generation amount information and provide it to the diagnosis unit 70. [

The inverter 50 may be a known inverter, and since the inverter 50 is well known in the art, a more detailed description will be omitted.

Subsequently, referring to FIG. 1, a sensor unit 20 is provided in a solar cell power generation diagnosis system. The sensor unit 20 senses the irradiation amount or the illuminance and the temperature. For example, the sensor unit 20 may include a light amount sensor (not shown) for sensing a radiation amount or an illuminance and a temperature sensor (not shown) for sensing temperature. In this case, the amount of solar radiation means the amount of sunlight presently, and the illuminance means the solar irradiance. Generally, solar cells have different efficiency depending on temperature. Therefore, in order to measure efficiency, temperature data is required as well as irradiation amount or illuminance data that can represent light energy. Therefore, the sensor unit 20 senses the irradiation dose, the illuminance, and the temperature, and provides it to the diagnostic unit 70.

Next, with reference to Fig. 1 and / or 2, a diagnostic unit 70 provided in the solar cell power generation diagnostic system will be described in detail. The diagnosis unit 70 stores reference output data according to the solar radiation amount or illuminance and the temperature of each of the plurality of solar cell module units 10. Further, the diagnosis unit 70 receives the irradiance or illuminance sensed from the sensor unit 20, and a temperature signal. The diagnosis unit 70 also receives the output intensity of each solar cell module unit from the connection board 30. [ At this time, the diagnosis unit 70 compares the received output data for each solar cell module unit with the reference output data stored according to the received solar radiation amount or roughness, and the temperature signal to measure the performance or efficiency of each solar cell module unit. Further, the diagnosis unit 70 judges whether or not each solar cell module unit 10 is abnormal based on the measured performance or efficiency. In addition, the diagnostic unit 70 outputs the performance or efficiency of each solar cell module unit, the output status of each solar cell module unit or the solar cell module unit, and whether or not the abnormality is present.

2, specifically, in one example, the diagnosis unit 70 includes a storage unit 71, a receiving unit 73, an MCU 74, a display unit 75, and an abnormal output unit 76 .

At this time, the storage unit 71 of FIG. 2 stores the reference output data according to the solar radiation amount or illuminance and the temperature of each of the plurality of solar cell module units 10. For example, the reference output data according to the solar radiation amount or the illuminance and the temperature supplied from the manufacturer of the solar cell module unit 10 are stored in the storage unit 71 or stored in the storage unit 71 or the standard performance data of the solar cell module unit 10 of the same model (Standard test conditions), and the reference output data according to the temperature can be stored and input into the storage unit 71. [0053]

2 is connected to the sensor unit 20 and the connection unit 30 and receives the irradiance or illuminance and the temperature signal sensed by the sensor unit 20, And receives the output intensity of each solar cell module unit sensed by the solar cell module unit. At this time, the receiving unit 73 may be connected to the sensor unit 20 and / or the connection unit 30 by wires, or may be connected to the sensor unit 20 and / or the connection unit 30 wirelessly. In terms of price, wired connection is preferable.

In another example, the receiving unit 73 may further receive the total power generation amount information detected from the inverter 50. [

Next, the MCU 74 of FIG. 2 receives output data, solar radiation amount or illuminance, and temperature signal for each solar cell module unit from the receiving unit 73. At this time, the MCU 74 compares the output data of each solar cell module unit with the reference output data stored in the storage unit 71 according to the supplied solar radiation amount, illuminance, and temperature to measure the performance and / or efficiency of each solar cell module unit do. Further, the MCU 74 judges whether or not each solar cell module unit 10 is abnormal based on the measured performance and / or efficiency. For example, when determining whether or not each solar cell module unit 10 is abnormal, the measured performance and / or efficiency may correspond to a preset reference range, or the measured performance or / It may be judged as an abnormal state when it corresponds to the set abnormal range criterion.

For example, at this time, the MCU 74 may compare the current-voltage characteristics of the output data of each solar cell module unit with the current-voltage characteristics of the reference output data to measure the performance and / or efficiency of each solar cell module unit. Alternatively, the MCU 74 may calculate the maximum power point from the output data of each solar cell module unit, compare the reference power point with the reference maximum power point, and measure the performance and / or efficiency of each solar cell module unit. Alternatively, the MCU 74 may measure the performance and / or efficiency of each solar cell module unit by comparing both the current-voltage characteristic and the maximum power point.

In another example, when receiving the total power generation amount information from the inverter 50 at the receiving unit 73, the MCU 74 calculates the total power generation amount according to the total power generation amount information received from the receiving unit 73, The overall power generation efficiency can be measured by comparing the total power generation amount. At this time, the receiving unit 73 may be connected to the inverter 50 by wire or wirelessly. For example, in terms of price, it is preferable to be connected by a wire.

2, the display unit 75 displays the output state of the solar cell module unit or the entire solar cell module unit under the control of the MCU 74 according to the setting, and / / And efficiency. The display unit 75 may be formed of, for example, an LCD panel, and may be touch-enabled, but is not limited thereto.

For example, in one example, the display unit 75 may display the total power generation amount according to the information received at the MCU 74 or the total power generation efficiency measured at the MCU 74 according to the setting.

2, the abnormality outputting section 76 outputs an abnormality signal according to the determination of the abnormality according to the control of the MCU 74 according to the setting. For example, the abnormal output section 76 may be a speaker or a buzzer for outputting an abnormal signal by sound, or may output an abnormal signal by a lamp such as red, or the buzzer and the lamp may output an abnormal signal together , But is not limited thereto.

As another example, the diagnosis unit 70 of the solar cell power generation diagnostic system can further determine whether the corresponding solar cell module unit 10 is replaced or not in accordance with the determination of the abnormality. For example, it is possible to further determine whether the solar cell module unit 10 is replaced when the MCU 74 makes an abnormality determination. For example, the determination of whether or not the solar cell module unit 10 is replaced may be determined as a replacement target when performance or the like falls within a predetermined range in the determination of an anomaly.

According to another example, the diagnosis unit 70 of the solar cell power generation diagnostic system can output the corresponding abnormality presumed cause information upon abnormality according to the determination of abnormality according to the setting. For example, the MCU 74 may output the corresponding abnormality estimation cause information through matching with the information previously stored in the storage unit 71, for example, the performance determined in the MCU 74, The judgment information matched with the stored information may be a combination of various information determined by the MCU 74 or selected information from various information. For example, when the result of the information including the error with the reference output data has a characteristic distinguishing according to the cause of abnormality, the abnormality presumed cause information may be stored together with the information for distinguishing the abnormality presumed cause information and the like in the storage unit 71.

Next, a solar cell power generation diagnostic apparatus according to another embodiment of the present invention will be described with reference to the drawings. At this time, embodiments of the solar cell power generation diagnosis system according to the above-described one aspect and FIGS. 1 and 2 can be referred to, and redundant explanations can be omitted.

3 is a block diagram schematically showing a solar cell power generation diagnostic apparatus according to another embodiment of the present invention.

3, a solar cell power generation diagnostic apparatus 100 according to one example includes a sensor unit 20, a storage unit 101, a receiving unit 103, an MCU unit 104, a display unit 105, And an abnormal output unit (106). In this case, the sensor unit 20 is connected to the sensor unit 20 of Fig. 1, the receiving unit 103 to the receiving unit 73 of Fig. 2, the MCU unit 104 to the MCU 74 of Fig. The display unit 105 may correspond to the display unit 75 of Fig. 1, and the abnormal output unit 106 may correspond to the abnormal output 76 of Fig. 2, respectively. Each configuration will be described in detail with reference to the drawings.

Referring to FIG. 3, the sensor unit 20 senses the irradiation amount or the illuminance, and the temperature. For example, the sensor unit 20 may include a light amount sensor (not shown) for sensing the irradiation amount or the illuminance and a temperature sensor (not shown) for sensing the temperature. For example, the sensor unit 20 may be a module unit physically contained in the solar cell power generation diagnostic apparatus 100, or may be an independent module unit that is separated from the other configurations of the solar cell power generation diagnostic apparatus 100 but electrically connected thereto .

Next, the storage unit 101 of FIG. 3 stores reference output data according to the solar radiation amount or illuminance and the temperature of each of the plurality of solar cell module units 10. For example, the reference output data according to the solar radiation amount or the illumination and the temperature obtained through the standard performance evaluation of the solar cell module unit 10 provided by the manufacturer of the solar cell module unit 10 or the same model is stored in the storage unit 101 Can be input and stored.

For example, in one example, the storage unit 101 may further store abnormality estimation cause information according to information including an error with reference output data. For example, when the result of the information including the error with the reference output data has a characteristic that is distinguished according to the cause of the abnormality, the abnormality estimated cause information can be stored together with the information for distinguishing it.

Next, the receiving unit 103 of FIG. 3 receives the output intensity of each solar cell module unit sensed from the DC signal output of the plurality of solar cell module units 10 grouped into replaceable units. For example, at this time, the solar cell module unit 10 may be a unit array unit that can be replaced with a unit in which a plurality of solar cell module elements are arrayed. At this time, a plurality of solar cell module units 10, which are replaceable units, can be grouped to form a solar cell unit array. At this time, the receiving unit 103 can receive the output intensity of each solar cell module unit sensed from the DC signal output of the plurality of solar cell module units 10 wirelessly or wired, and in terms of price, it is preferable to receive the wired signal.

For example, in one example, in order to determine the overall power generation efficiency, the receiving unit 103 calculates total power generation information detected from the inverter 50 that converts the DC signal output of the plurality of solar cell module units 10 to the AC signal Can receive more.

Next, the MCU unit 104 of FIG. 3 will be described. The MCU unit 104 receives the solar radiation amount or intensity and the temperature signal sensed by the sensor unit 20 and outputs output data per solar module unit provided from the receiving unit 103 in accordance with the received solar radiation amount or illuminance and temperature signal With the reference output data stored in the storage unit 101 to measure the performance and / or efficiency of each solar cell module unit. Further, the MCU unit 104 judges whether or not each solar cell module unit 10 is abnormal based on the measured performance or / and efficiency. For example, when it is determined that there is an abnormality in each solar cell module unit 10, if the measured performance and / or efficiency, or the result of the comparison, . ≪ / RTI >

For example, in one example, the MCU unit 104 compares the current-voltage characteristics of the output data for each solar cell module unit with the current-voltage characteristics of the reference output data, And compares it with the reference maximum power point of the reference output data. Alternatively, performance or efficiency can be measured by comparing both the current-voltage characteristic and the maximum power point.

For example, when the total power generation amount information is received in the receiving unit 103 for the overall power generation efficiency determination, the MCU unit 104 calculates the total power generation amount in accordance with the total power generation amount information received from the receiving unit 103, The overall power generation efficiency can be measured by comparing the total power generation amount.

For example, in another example, the MCU unit 104 may further determine whether the corresponding solar cell module unit 10 is to be replaced in the event of an abnormality according to the determination of the abnormality.

Further, in one example, the MCU unit 104 may output the corresponding abnormality presumed cause information on the display unit 105 in the event of abnormality according to the determination of abnormality according to the setting.

3, the display unit 105 displays the output state of the solar cell module unit or the entire solar cell module according to the control of the MCU unit 104 according to the setting, and / or the performance of the solar cell module unit And / or efficiency.

For example, when the total power generation efficiency according to the total power generation amount information is measured in the MCU unit 104, the display unit 75 can display the total power generation amount or the total power generation efficiency according to the setting.

Subsequently, the abnormal output unit 106 of FIG. 3 outputs an abnormal signal according to the determination of the abnormality according to the control of the MCU unit 104 according to the setting. For example, the abnormal output section 76 may be a speaker or a buzzer for outputting an abnormal signal by sound, or may output an abnormal signal to the lamp, or may be provided with a buzzer and a lamp to output an abnormal signal.

Next, a solar cell power generation diagnostic method according to another aspect of the present invention will be described with reference to the drawings. At this time, embodiments of the solar cell power generation diagnostic system according to one aspect, embodiments of the solar cell power generation diagnostic apparatus, and FIGS. 1 to 3 can be referred to, and redundant explanations can be omitted.

FIG. 4 is a flowchart schematically illustrating a solar cell power generation diagnostic method according to another embodiment of the present invention, and FIG. 5 is a flowchart schematically illustrating a solar cell power generation diagnostic method according to another embodiment of the present invention FIG. 6 is a flowchart schematically illustrating a solar cell power generation diagnostic method according to another embodiment of the present invention, and FIG. 7 is a flowchart schematically illustrating a solar cell power generation diagnostic method according to another embodiment of the present invention .

4 to 7, the solar cell power generation diagnostic method includes a photoelectric conversion step S100, a sensing step S200, a solar cell output receiving step S300, S300 ', a diagnosis step S400, and an output step S500. . At this time, the photoelectric conversion step (S100) and the sensing step (S200) may be performed at the same time, or may be sequentially performed so that one of them is ahead. Each step will be described in detail with reference to the drawings.

Referring to FIGS. 4 to 7, in the photoelectric conversion step S100, light energy is converted into electric signals in a plurality of solar cell module units 10 grouped into replaceable units.

Next, in the sensing step (S200), the irradiation amount or the illuminance and the temperature are detected. For example, the sensor unit 20 or 102 of FIG. 1 or 3 detects the irradiation amount or the illuminance and the temperature.

4 to 7, in the solar cell output receiving step (S300, S300 "), the output intensity of each solar cell module unit is received from the DC signal outputted through the photoelectric conversion step (S100) (S300, S300a). For example, the output intensity of each solar cell module unit is received in the receiving unit 73 of FIG. 2 or the receiving unit 103 of FIG.

Next, the diagnostic steps S400, S400 ', S400', and S401 will be described with reference to FIGS. 4 to 7. In the diagnostic steps S400, S400 ', and S400, The output data for each solar cell module unit received in the step S200 is converted into the solar radiation amount or the illuminance of each of the plurality of already stored solar cell module units 10, The performance and / or efficiency of each solar cell module unit is measured by comparing the reference output data with the temperature (S400, S400a). In the diagnostic steps S400, S400 ', and S400', it is determined whether or not each solar cell module unit 10 is abnormal based on the measured performance and / or efficiency of each solar cell module unit (S400, S400a).

For example, referring to FIG. 6, in one example, in the diagnosis step S401, the current-voltage characteristic of the output data for each solar cell module unit and the current-voltage characteristic of the reference output data are compared and the performance or efficiency is measured Or the maximum power point can be calculated from the output data of each solar cell module unit and compared with the reference maximum power point of the reference output data so that the performance or efficiency can be measured or both the current- Performance or efficiency can be measured.

Referring to Fig. 7, in one example, in the diagnosis step S400 ", it is possible to further determine whether or not the corresponding solar cell module unit 10 is replaced according to the abnormality (S400c).

Referring to Fig. 7, in another diagnostic example (S400 "), in accordance with the setting, from the ideal estimation cause information according to the information including the error with the already stored reference output data, (S400d).

At this time, in FIG. 7, the step of determining whether the module unit 10 is replaced (S400c) and the unexpected cause extraction / selection step (S400d) are either omitted or both Can be implemented.

For example, in FIGS. 4 to 7, the diagnostic steps S400, S400 ', S400', and S401 may be performed in the MCU 74 of FIG. 2 or the MCU unit 104 of FIG.

4 to 7, in the output step (S500, S500 ', S500 "), the output state or measured performance or efficiency of each solar cell module unit or the entire solar cell module unit is displayed according to the setting (S500, S500a). Further, in the output steps S500, S500 ', and S500 ", an abnormal signal according to the determination of abnormality is output according to the setting (S500, S500a). For example, the output state or the measured performance or efficiency of the solar cell module unit or the whole is displayed through the display unit 75 of FIG. 2 or the display unit 105 of FIG. 3, The abnormal output unit 76 or the abnormal output unit of FIG.

For example, referring to Fig. 7, in one example, in the output step S500 ", the estimated cause information extracted or selected in the diagnosis step S400 "or S400d may be displayed according to the setting (S500c).

Referring to FIG. 5, another example of the solar cell power generation diagnostic method according to one example may further include an inverting step (S600). In the inverting step S600, the DC signal outputted in the photoelectric conversion step S100 is converted into an AC signal and outputted.

At this time, in the solar cell output receiving step (S300 '), the total power generation amount information detected from the AC signal output outputted in the inverting step (S600) can be further received (S300b). In the diagnostic step S400 ', the overall power generation efficiency may be measured by comparing the total power generation amount according to the received total power generation amount information with the reference total power generation amount based on the reference output data (S400b). In the output step S500 ', the total power generation amount and the total power generation efficiency can be displayed according to the setting (S500b).

The foregoing embodiments and accompanying drawings are not intended to limit the scope of the present invention but to illustrate the present invention in order to facilitate understanding of the present invention by those skilled in the art. Embodiments in accordance with various combinations of the above-described configurations can also be implemented by those skilled in the art from the foregoing detailed description. Accordingly, various embodiments of the present invention may be embodied in various forms without departing from the essential characteristics thereof, and the scope of the present invention should be construed in accordance with the invention as set forth in the appended claims. Alternatives, and equivalents by those skilled in the art.

10: solar cell module unit 20: sensor unit
30: connection board 50: inverter
70: diagnosis unit 71:
73: Receiving unit 74: MCU
75: display unit 76: abnormal output unit
100: solar cell power generation diagnostic apparatus 101: storage unit
102: sensor unit 103: receiving unit
104: MCU unit 105: display unit
106: Abnormal output unit

Claims (3)

A plurality of solar cell module units that receive light energy and convert it into electrical energy, grouped into replaceable units;
A connection unit for receiving and outputting a direct current signal output from the plurality of solar cell module units;
An inverter for receiving an output signal of the connection module and converting the signal into an AC signal and outputting the AC signal to a load or a power system;
A sensor unit for sensing a solar radiation amount or an illuminance, and a temperature; And
Wherein the reference output data is stored in accordance with a temperature or an illuminance of each of the plurality of solar cell module units, and receives a detected solar radiation amount or intensity and a temperature signal from the sensor unit, And compares the received output data for each solar cell module unit with the reference output data according to the solar radiation amount, the illuminance, and the temperature signal to measure the performance or efficiency of each solar cell module unit, And a diagnostic unit for judging whether or not the solar cell module unit is abnormal and outputting the output state of the solar cell module unit, the performance or efficiency of each of the solar cell module units, and the abnormality of the solar cell module unit, system.
A sensor unit for sensing a solar radiation amount or an illuminance, and a temperature;
A storage unit for storing reference output data according to a temperature or an illuminance of each of the plurality of solar cell module units, and a temperature;
A receiving unit for receiving output intensity of each solar cell module unit sensed from a DC signal output of the plurality of solar cell module units grouped into replaceable units;
The output data for each solar cell module unit provided from the receiving unit is compared with the reference output data stored in the storage unit according to the solar radiation amount or the illuminance and the temperature signal sensed by the sensor unit to measure the performance or efficiency of each solar cell module unit An MCU unit for determining whether each solar cell module unit is abnormal based on the performance or efficiency;
A display unit for displaying the output state or the performance or efficiency of the solar cell module unit or the entire solar cell module unit according to the control of the MCU unit according to the setting; And
And an abnormal output unit for outputting an abnormal signal according to the determination of the abnormality according to the control of the MCU unit according to the setting.
A photoelectric conversion step of converting light energy into an electric signal in a plurality of solar cell module units grouped into replaceable units;
A sensing step of sensing a solar radiation amount or an illuminance, and a temperature;
A solar cell output receiving step of receiving the output intensity of each solar cell module unit from the DC signal output through the photoelectric conversion step;
The output data of each solar cell module unit received in the solar cell output receiving step is converted into the output data of each of the plurality of solar cell module units stored in advance in accordance with the solar radiation amount, And a temperature measurement unit for measuring a performance or efficiency of each solar cell module unit by comparing the reference output data with the reference output data according to temperature and determining whether each solar cell module unit is abnormal based on the performance or efficiency; And
And an output step of outputting an output signal of each or all of the solar cell module units or the measured performance or efficiency according to the setting and outputting an abnormal signal according to the determination of the abnormality.

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