Apparatus and method for controlling photovoltaic module

Abstract

An apparatus for controlling a photovoltaic module according to one aspect of the present invention comprises: a communication unit for receiving data from a plurality of photovoltaic modules included in a plurality of photovoltaic module arrays; and a processor for monitoring and controlling operating states of the plurality of photovoltaic modules on the basis of the data received through the communication unit, wherein the communication unit can include a coupling unit for connecting the plurality of photovoltaic module arrays to the processor in a many-to-one manner.

Description

Device and method for controlling solar modules

[0001] The present invention relates to a device and method for controlling a solar module. Specifically, the present invention relates to a device and method for controlling a solar module based on power line communication.

[0002] Solar power generation systems, which convert solar energy into electrical energy, are being applied in various fields.

[0003] Meanwhile, there are still limitations to managing power generation efficiency by photovoltaic module (PV Module) unit included in solar power generation systems.

[0004] Furthermore, solar modules can experience degradation in power generation performance due to whitening, electrode corrosion, and insulation breakdown. Consequently, demand is growing for methods to quickly and easily detect deterioration in solar module power generation performance and extend their lifespan.

[0005] Additionally, when an abnormality is detected in a photovoltaic module array (PVMA) in which solar modules are connected, it may be difficult to clearly determine which solar module has failed.

[0006] If a failure in a solar module is not addressed in advance, the solar power generation system may not operate properly, resulting in economic losses.

[0007] Therefore, a method to control and monitor solar modules more easily is needed.

[0008] The present invention provides a device and method for controlling a solar module. Furthermore, the present invention provides a computer-readable recording medium containing a program for executing the method on a computer. The technical challenges to be addressed are not limited to the technical challenges described above, and other technical challenges may exist.

[0009] A device for controlling a solar module according to one aspect includes a communication unit for receiving data from a plurality of photovoltaic modules included in a plurality of photovoltaic module arrays; and a processor for monitoring and controlling the operation states of the plurality of photovoltaic modules based on the data received through the communication unit; wherein the communication unit may include a coupling unit for connecting the plurality of photovoltaic module arrays and the processor in a many-to-one manner.

[0010] A method for controlling a solar module according to another aspect includes: a step in which a communication unit receives data of a plurality of photovoltaic modules included in a plurality of photovoltaic module arrays; a step in which a processor determines an operating state of the photovoltaic modules based on the data received through the communication unit; and a step in which the processor controls an output unit to output a screen indicating the operating state of the photovoltaic modules; wherein the communication unit can connect the plurality of photovoltaic module arrays and the processor in a many-to-one manner through a coupling unit.

[0011] According to another aspect, a computer-readable recording medium may include a recording medium having recorded thereon a program for executing the above-described method on a computer.

[0012] The status of solar modules can be easily checked. Furthermore, the complexity of control and communication for solar modules can be reduced, and communication quality within the solar power system can be improved.

[0013] FIG. 1 is a diagram illustrating an example of a plurality of solar module arrays and a control device according to one embodiment.

[0014] FIG. 2 is a drawing for explaining an example of a power supply structure of a building in which a solar module is installed according to one embodiment.

[0015] FIG. 3 is a block diagram illustrating an example of a control device according to one embodiment.

[0016] FIG. 4 is a drawing showing an example of a power line connection configuration of a communication unit of a control device according to one embodiment.

[0017] FIG. 5 is a diagram illustrating an example of a system including a control device, a solar module, a solar module array, and an inverter according to one embodiment.

[0018] FIG. 6 is a diagram illustrating an example of a communication unit and a processor of a control device according to one embodiment.

[0019] FIG. 7 is a diagram illustrating an example of a control device including a signal amplifier according to one embodiment.

[0020] FIG. 8 is a diagram illustrating another example of a control device including a signal amplifier according to one embodiment.

[0021] FIG. 9 is a flowchart illustrating an example of a method for controlling a solar module according to one embodiment.

[0022] FIG. 10 is a flowchart illustrating another example of a method for controlling a solar module according to one embodiment.

[0023] FIG. 11 is a drawing showing an example of a monitoring screen for a solar module of an integrated control device according to one embodiment.

[0024] A device for controlling a solar module according to one aspect includes a communication unit for receiving data from a plurality of photovoltaic modules included in a plurality of photovoltaic module arrays; and a processor for monitoring and controlling the operation states of the plurality of photovoltaic modules based on the data received through the communication unit; wherein the communication unit may include a coupling unit for connecting the plurality of photovoltaic module arrays and the processor in a many-to-one manner.

[0025] The terms used in the examples are selected from widely used, current terms, as much as possible. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, the applicant may arbitrarily select terms, in which case their meanings will be described in detail in the relevant description. Therefore, the terms used in the specification should be defined based on their intended meaning and the overall content of the specification, rather than simply their names.

[0026] When a part of a specification is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise stated.

[0027] Additionally, terms including ordinal numbers, such as "first" or "second," used in the specification may be used to describe various components, but the components should not be limited by the terms. The terms may be used to distinguish one component from another.

[0028] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description set forth below, together with the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced. In the drawings, portions irrelevant to the description may be omitted for clarity in describing the present invention, and the same reference numerals may be used throughout the specification for identical or similar components.

[0029] FIG. 1 is a diagram illustrating an example of a plurality of solar module arrays and a control device according to one embodiment.

[0030] Referring to FIG. 1, a plurality of solar modules (11 to 10n, 21 to 20n, 31 to 30n) can be interconnected to form solar module arrays (10, 20, 30).

[0031] For example, a plurality of solar modules (11 to 10n, 21 to 20n, 31 to 30n) can be connected to each other via a power line (270).

[0032] For example, solar module arrays (10, 20, 30) may each be connected to inverters (251, 252, 253). The inverters (250) may convert direct current power generated by the solar module arrays (10, 20, 30) into alternating current power.

[0033] In addition, a plurality of solar module arrays (10, 20, 30) can be connected to a control device (100) to transmit and receive data. For example, a plurality of solar modules (11 to 10n, 21 to 20n, 31 to 30n) can transmit and receive data with the control device (100) via power line communication (PLC).

[0034] Powerline communication (PLC) is a communication method that transmits data via power lines (e.g., cables) that supply electricity. For example, PLC can transmit data via frequency signals transmitted over the power lines. PLC can be categorized as high-speed or low-speed based on communication speed, and as high-voltage or low-voltage based on communication voltage. For example, home solar modules and control devices can communicate using a frequency band of 50-60 Hz, but this is not a limitation.

[0035] The first solar module array (10) may include a first group of solar modules (11 to 10n). In addition, the first solar module array (10) may be connected to a first inverter (251).

[0036] The second solar module array (20) may include a second group of solar modules (21 to 20n). In addition, the second solar module array (20) may be connected to a second inverter (252).

[0037] The third solar module array (30) may include a third group of solar modules (31 to 30n). In addition, the third solar module array (30) may be connected to a third inverter (253).

[0038] Although Figure 1 depicts a total of three solar module arrays, this is not a limitation. The number of solar module arrays included in a solar power generation system may vary depending on needs.

[0039] Additionally, although FIG. 1 illustrates that the solar modules included in the solar module array are connected in series, this is not limited to this. In other words, the solar modules may also be connected in parallel with each other.

[0040] For example, a single solar module string can be formed by connecting solar modules in series. Alternatively, a single solar module array can be formed by connecting solar module strings in parallel.

[0041] Solar modules (11 to 10n, 21 to 20n, 31 to 30n) can each be connected to a converter, and a plurality of converters can be connected to inverters (250).

[0042] The inverters (250) and the control device (100) can be connected to the solar modules (11 to 10n, 21 to 20n, 31 to 30n) and the solar module arrays (10, 20, 30) via the same power line (270).

[0043] Inverters (250) can convert energy (e.g., direct current power) generated from solar modules (11 to 10n, 21 to 20n, 31 to 30n) and solar module arrays (10, 20, 30) by adding them up.

[0044] The control device (100) can transmit and receive data through the solar modules (11 to 10n, 21 to 20n, 31 to 30n) and the solar module arrays (10, 20, 30) and the power line (270). Accordingly, the control device (100) can receive data from the solar modules (11 to 10n, 21 to 20n, 31 to 30n) and the solar module arrays (10, 20, 30).

[0045] Even if the control device (100) does not include multiple modules (e.g., controllers) for collecting data of each of the solar module arrays (10, 20, 30) or each of the solar modules (11 to 10n, 21 to 20n, 31 to 30n), it can be connected to the solar module arrays (10, 20, 30) through the coupling unit (70). That is, the coupling unit (70) can connect the solar module arrays (10, 20, 30) and the processor (110) in a many-to-one manner.

[0046] Accordingly, one control device (100) can directly receive and process data from solar module arrays (10, 20, 30). Accordingly, the complex communication structure in existing solar power generation systems can be improved.

[0047] The control device (100) can check the operating status and control the operation of each of the solar module arrays (10, 20, 30). In addition, the control device (100) can check the operating status and control the operation of each of the solar modules (11 to 10n, 21 to 20n, 31 to 30n).

[0048] Accordingly, the control device (100) can quickly process data of each of the solar module arrays (10, 20, 30) and each of the solar modules (11 to 10n, 21 to 20n, 31 to 30n).

[0049] The control device (100) can monitor the power generation amount and operating status of each of the solar modules (11 to 10n, 21 to 20n, 31 to 30n) based on data received from the solar modules (11 to 10n, 21 to 20n, 31 to 30n).

[0050] The control device (100) can check whether a solar module is faulty by receiving a fault signal through a module-level power conversion device (or module-level power control device) (hereinafter referred to as 'MLPE') of each of the solar modules (11 to 10n, 21 to 20n, 31 to 30n). In some cases, when a fault occurs in at least one of the solar modules (11 to 10n, 21 to 20n, 31 to 30n), the control device (100) can quickly transmit a control signal to stop operation to the faulty solar module according to the operating state of the faulty solar module.

[0051] Additionally, if at least one of the solar modules (11 to 10n, 21 to 20n, 31 to 30n) is faulty, the control device (100) can individually control each of the solar modules (11 to 10n, 21 to 20n, 31 to 30n).

[0052] For example, an MLPE could be an optimizer or a micro inverter.

[0053] For example, if the MLPE is an optimizer, the solar power generation system may include a single inverter. In this case, a single MLPE may be connected to a single solar module, and the MLPE may optimize the power output from the single solar module and output it to a single inverter (e.g., a string inverter). The power converted by the inverter (e.g., converting direct current to alternating current) may be output to a load or the grid.

[0054] As another example, if the MLPE is a microinverter, a single MLPE can be connected to a single solar module. In this case, the MLPE can convert the power generated by the single solar module, and the converted power can be output to a load or the grid.

[0055] FIG. 2 is a drawing for explaining an example of a power supply structure of a building in which a solar module is installed according to one embodiment.

[0056] Referring to FIG. 2, solar modules (2) can be installed on the roof of a building to generate electricity. As described above with reference to FIG. 1, the solar modules (2) can form at least one solar module array.

[0057] The inverter (6) can convert power generated from solar modules and supply it into the building (1).

[0058] Meanwhile, commercial power transmitted through the power line (3) can be supplied to the building through the transformer (4).

[0059] A plurality of home appliances (7) can be operated by selectively receiving at least one of commercial power or power generated by solar modules (2). The power meter (5) can measure the amount of power consumed in the building (1).

[0060] Additionally, if a separate energy storage system (ESS) is installed in the building (1), the power generated from the solar modules (2) can be stored in the energy storage system (ESS).

[0061] The solar modules (2) may form at least one solar module array. For example, the solar module array may include one output terminal.

[0062] Meanwhile, solar modules (2) may include MLPE.

[0063] For example, the MLPE device can monitor the status or power generation of solar modules (2) and transmit data to an external device.

[0064] Additionally, MLPE can perform Rapid Shutdown (RSD) and stop the operation of the solar module depending on the degree of failure of the solar module.

[0065] Additionally, at least one of the solar modules (2) and the MLPEs may include a communication module for power line communication.

[0066] The control device (100) can receive data from at least one solar module array via power line communication.

[0067] For example, the control device (100) can receive data about the solar modules (2) from the MLPE provided in each of the solar modules (2).

[0068] The control device (100) can monitor the power generation and operating status of the solar modules (2) based on the received data.

[0069] Additionally, when the MLPE's rapid shutdown function is executed, the control device (100) can receive a failure signal and confirm a failure of the solar module. In some cases, if a failure occurs in the solar module, the control device (100) can transmit a control signal to the solar module to stop operation, depending on the operating status of the solar module.

[0070] FIG. 3 is a block diagram illustrating an example of a control device according to one embodiment.

[0071] Referring to FIG. 3, the control device (100) may include a sensor (140), an input unit (170), an output unit (180), a communication unit (130), a memory (120), and a processor (110).

[0072] For example, the sensor (140) may include at least one sensor. The sensor (140) may transmit detected data to the processor (110). The sensor (140) may detect the connection status of a power line (communication line) by measuring the current or voltage flowing in the power line (communication line). In addition, the sensor (140) may detect whether the object is heated based on the measured temperature.

[0073] For example, the input unit (170) may include at least one input means among a switch and a button. Through the input unit (170), setting data or control data for a plurality of solar modules or a plurality of solar module arrays may be input.

[0074] For example, the output unit (180) may include at least one of a lamp, a display, and a speaker. The output unit (180) may output data received from solar modules or solar module arrays.

[0075] Additionally, if a failure occurs in at least one of the solar modules or solar module arrays, the output unit (180) may output a notification or warning. For example, the output unit (180) may output data detected by the sensor (140) and output a warning if an abnormality occurs in at least one module of the solar power generation system.

[0076] The memory (120) can store data about solar modules or solar module arrays.

[0077] For example, the memory (120) can store data for each individual solar module or individual solar module array. Additionally, the memory (120) can store data regarding the capacity, installation date, failure history, cumulative production volume, and cumulative operating days of each solar module.

[0078] For example, the memory (120) can store address data (121), solar module data (122), solar module array data (123), and analysis data (124).

[0079] Address data (121) includes address information assigned to each solar module and can be used as an identifier for the solar module. Solar module data (122) can include data on the amount of power generated, operating status, etc. of the solar module. Solar module array data (123) can include information on the solar module array, information on solar modules included in the solar module array, and information on the total amount of power generated by the solar module array.

[0080] The analysis data (124) may include statistical data regarding data of the solar modules and data of the solar module array. For example, the analysis data (124) may include statistical data according to the hour, day, month, and year, as well as data regarding the total amount of power generated by the solar modules.

[0081] The memory (120) can store data for any one of an energy management algorithm, a solar module control algorithm, a solar module array control algorithm, a data processing algorithm, and a parallel communication control algorithm.

[0082] For example, the memory (120) may include a storage means such as non-volatile memory such as RAM (Random Access Memory), ROM, EEPROM (Electrically Erased Programmable ROM), and flash memory.

[0083] The communication unit (130) includes a wired or wireless communication module. For example, the communication unit (130) may include a power line communication module (PLC Module) (131). In addition, the communication unit (130) may perform communication according to at least one of short-range communication, mobile communication, and serial communication, such as Ethernet, Wi-Fi, Bluetooth, or NFC (Near Field Communication).

[0084] For example, the communication unit (130) can communicate with solar modules or solar module arrays.

[0085] The communication unit (130) can transmit and receive data by forming a parallel communication circuit with each of the solar modules.

[0086] Additionally, the communication unit (130) can communicate with external servers, management servers, and administrator terminals. For example, the communication unit (130) can receive weather information from a meteorological server and receive past power generation data from a management server.

[0087] The processor (110) can process data of solar modules and solar module arrays and control their operation according to an algorithm stored in the memory (120).

[0088] The processor (110) can analyze data of solar modules received through the communication unit (130) and generate a monitoring screen regarding the operating status of the solar modules. In addition, the processor (110) can control the output unit (180) so that the monitoring screen can be output.

[0089] The processor (110) can distinguish each solar module based on the received data and control the output unit (180) so that the amount of power generated by each solar module can be output.

[0090] The processor (110) can calculate the total power of the solar module arrays and control the output unit (180) so that the total power can be output. In addition, the processor (110) can also calculate the average power for each solar module.

[0091] The processor (110) can determine whether a solar module is faulty in response to a fault signal received from at least one of the solar modules. For example, the processor (110) can control the output unit (180) to output a screen showing a change in color or different text for the faulty solar module. Additionally, the processor (110) can control the output unit (180) to output a warning regarding the faulty solar module.

[0092] The processor (110) can distinguish data of each solar module and store the data in the memory (120). The processor (110) can determine the operating status of each solar module based on the data stored for each solar module.

[0093] The processor (110) can individually control the solar modules so that only the remaining solar modules, excluding the solar modules judged to be faulty (i.e., faulty solar modules), operate among all solar modules.

[0094] When a failure signal due to rapid shutdown is received from a faulty solar module, the processor (110) can identify the faulty solar module. The processor (110) can control the output unit (180) to output a notification or warning regarding the faulty solar module.

[0095] For example, the processor (110) can process instructions of a computer program by performing basic arithmetic, logic, and input / output operations. Here, the instructions can be provided from the memory (120) or an external device. In addition, the processor (110) can generally control the operations of other components included in the control device (100).

[0096] Meanwhile, the processor (110) may perform at least some of the data analysis, processing, and result information generation for performing the above-described operations using at least one of a machine learning, neural network, or deep learning algorithm as a rule-based or artificial intelligence algorithm. Examples of the neural network may include models such as a CNN (Convolutional Neural Network), a DNN (Deep Neural Network), and an RNN (Recurrent Neural Network).

[0097] For example, the processor (110) may be implemented as an array of a plurality of logic gates, or it may be implemented as a combination of a general-purpose microprocessor and a memory storing a program that can be executed on the microprocessor. For example, the processor (110) may include a general-purpose processor, a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a controller, a microcontroller, a state machine, etc. In some environments, the processor (110) may include an application-specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. For example, the processor (110) may refer to a combination of processing devices, such as a combination of a digital signal processor (DSP) and a microprocessor, a combination of a plurality of microprocessors, a combination of one or more microprocessors coupled with a digital signal processor (DSP) core, or any other such combination of configurations.

[0098] FIG. 4 is a drawing showing an example of a power line connection configuration of a communication unit of a control device according to one embodiment.

[0099] Referring to FIG. 4, solar module arrays (10, 20, 30) are connected to a communication unit (130) of a control device (100) and can transmit data of the solar modules to the control device (100).

[0100] For example, the communication unit (130) may include a power line communication module (PLC Module) (131) and a coupling unit (70).

[0101] The coupling unit (70) is connected to the solar module arrays (10, 20, 30) and the power line (270), and can transmit a signal to the power line communication module (PLC Module) (131). That is, the coupling unit (70) can connect the solar module arrays (10, 20, 30) and the processor (110) in a many-to-one manner.

[0102] For example, the coupling unit (70) may include an isolation transformer. In addition, the coupling unit (70) may include an isolation element (not shown).

[0103] For example, one end (70a) of the coupling portion (70) can be connected to the output terminal of the solar module arrays (10, 20, 30). In addition, the other end (70b) of the coupling portion (70) can be connected to a power line communication module (PLC Module) (131).

[0104] The control device (100) is connected to the solar module arrays (10, 20, 30) through the coupling unit (70), thereby directly receiving data from the solar module arrays (10, 20, 30). Accordingly, the complex communication structure of the conventional solar power generation system can be improved.

[0105] A communication signal received at one end of the coupling unit (70) can be transmitted to the other end.

[0106] Since the coupling unit (70) includes an insulating element or an insulating transformer, unnecessary signal interference that may occur during the transmission of a communication signal can be blocked. Furthermore, the control device (100) can receive a communication signal with unnecessary power or noise blocked through the insulating performance of the coupling unit (70). Therefore, the quality of the communication signal can be improved.

[0107] The communication unit (130) can independently transmit and receive data with each of the solar module arrays (10, 20, 30) via the coupling unit (70). In addition, the communication unit (130) can independently transmit and receive data with each of the solar modules.

[0108] The processor (110) can perform monitoring of solar modules based on data received from solar module arrays (10, 20, 30).

[0109] Accordingly, the control device (100) can check the operating status and control the operation of each solar module array unit through the coupling unit (70). In addition, the control device (100) can check the operating status and control the operation of each solar module unit through the coupling unit (70).

[0110] FIG. 5 is a diagram illustrating an example of a system including a control device, a solar module, a solar module array, and an inverter according to one embodiment.

[0111] Referring to FIG. 5, one end of the coupling part (70) can be connected to the solar module arrays (10 to 30), and the other end can be connected to the power line communication module (PLC Module) (131).

[0112] The coupling unit (70) can block power or noise among signals transmitted from solar module arrays (10 to 30) and transmit the signals to a power line communication module (PLC Module) (131).

[0113] Accordingly, the control device (100) can be connected to and communicate with the solar module arrays (10 to 30), and thus can collect data on the solar modules.

[0114] FIG. 6 is a diagram illustrating an example of a communication unit and a processor of a control device according to one embodiment.

[0115] Referring to FIG. 6, the control device (100) may include a communication unit (130) and a processor (110).

[0116] For example, the communication unit (130) may include a coupling unit (70), a power line communication module (PLC Module) (131), and a plurality of connectors (87 to 89). In some cases, the coupling unit (70) and the plurality of connectors (87 to 89) may be provided on the outside of the communication unit (130) and may serve as an input / output interface that processes signal input / output of the communication unit (130).

[0117] A plurality of connectors (87 to 89) can be connected to the coupling portion (70). For example, each of the plurality of connectors (87 to 89) can be connected to a single solar module array and a single inverter.

[0118] Referring to FIG. 6, the first connector (87) can be connected to the first solar module array (10) and the first inverter (251). In addition, the second connector (88) can be connected to the second solar module array (20) and the second inverter (252). In addition, the third connector (89) can be connected to the third solar module array (30) and the third inverter (253).

[0119] The power line communication module (PLC Module) (131) transmits data received through the coupling unit (70) to the processor (110).

[0120] The processor (110) stores received data in the memory (120), analyzes data of the solar modules and solar module arrays (10 to 30), and can perform monitoring of the solar modules and solar module arrays (10 to 30).

[0121] Additionally, when a failure signal is received from the MLPE of the solar module, the processor (110) can display the failed solar module through the output unit (180).

[0122] FIG. 7 is a diagram illustrating an example of a control device including a signal amplifier according to one embodiment.

[0123] Referring to FIG. 7, the control device (100) may further include a signal amplifier (150).

[0124] The signal amplifier (150) may be included in the communication unit (130). For example, the signal amplifier (150) may be located between the coupling unit (70) and the power line communication module (PLC Module) (131). In some cases, the signal amplifier (150) may be implemented as a device independent from the communication unit (130). If the signal amplifier (150) is an independent device, the signal amplifier (150) may be placed between the coupling unit (70) and the solar modules.

[0125] The signal amplifier (150) can amplify a signal transmitted from a power line communication module (PLC Module) (131) to solar module arrays (10 to 60).

[0126] Accordingly, the solar module arrays (10 to 60) can receive signals with enhanced signal strength.

[0127] For example, the signal amplifier (150) may include a line driving circuit (151, 152). The line driving circuit (151, 152) may include at least one of a driving amplifier and a buffer.

[0128] Referring to FIG. 7, the first line driving circuit (151) can be connected to the first solar module array (10) to the third solar module array (30) through the first coupling portion (71).

[0129] Additionally, the second line driving circuit (152) can be connected to the fourth solar module array (40) to the sixth solar module array (60) through the second coupling portion (72).

[0130] At least one line driving circuit (151, 152) may be provided depending on the number of solar module arrays (10 to 60). Meanwhile, although FIG. 7 illustrates a single line driving circuit connected to three solar module arrays, the present invention is not limited thereto. In other words, depending on the design of the solar power generation system, the number of solar module arrays connected to a single line driving circuit may vary.

[0131] The line driving circuits (151, 152) can be connected to a power line communication module (PLC Module) (131). The line driving circuits (151, 152) can amplify signals received from the solar module arrays (10 to 60) through a coupling unit (70) and transmit the signals to the power line communication module (PLC Module) (131).

[0132] Accordingly, by controlling the signal strength of the control device (100) through the signal amplifier (150), signals from individual photovoltaic modules (PhotoVoltaic Modules) included in a plurality of photovoltaic module arrays (10 to 60) connected through power lines can be normally received by the control device (100). In addition, the control device (100) can transmit signals to individual photovoltaic modules. In addition, the control device (100) can improve the efficiency of communication through power lines.

[0133] FIG. 8 is a diagram illustrating another example of a control device including a signal amplifier according to one embodiment.

[0134] Referring to FIG. 8, the communication unit (130) may include a signal amplifier (150). For example, the signal amplifier (150) may be located between the coupling unit (70) and the power line communication module (PLC Module) (131).

[0135] The signal amplifier (150) can amplify signals transmitted and received between solar module arrays (10 to 60) and a power line communication module (PLC Module) (131).

[0136] For example, the signal amplifier (150) may include a first push-pull circuit (153) and a second push-pull circuit (154). At least one push-pull circuit (153, 154) may be provided depending on the number of solar module arrays (10 to 60). Meanwhile, although FIG. 8 illustrates a single push-pull circuit as being connected to three solar module arrays, the present invention is not limited thereto. In other words, depending on the design of the solar power generation system, the number of solar module arrays connected to a single push-pull circuit may vary.

[0137] For example, a push-pull circuit is a circuit in which two amplifiers are connected to operate complementarily with each other, and can amplify signals transmitted and received through power line communication.

[0138] Referring to FIG. 8, the first push-pull circuit (153) can be connected to the solar module arrays (10 to 30) via the first coupling portion (71). In addition, the second push-pull circuit (154) can be connected to the solar module arrays (40 to 60) via the second coupling portion (72).

[0139] Push-pull circuits (153, 154) can amplify the signal of the power line communication module (PLC Module) (131) and transmit it to the coupling unit (70).

[0140] Additionally, the push-pull circuits (153, 154) can amplify the signals of the solar module arrays (10 to 60) received through the coupling unit (70) and transmit them to the power line communication module (PLC Module) (131).

[0141] Accordingly, the communication unit (130) can transmit a signal having an intensity greater than a certain size to N power lines connected to the solar module arrays (10 to 60) by transmitting the amplified signal through the signal amplifier (150). (Here, N is a natural number greater than or equal to 1)

[0142] FIG. 9 is a flowchart illustrating an example of a method for controlling a solar module according to one embodiment.

[0143] The flowchart illustrated in Fig. 9 illustrates an example of a method by which a control device (100) controls a solar module. Therefore, even if the details are omitted below, the matters described above with reference to Figs. 1 to 8 may also be applied to the operation of the control device (100) described below with reference to Fig. 9.

[0144] The communication unit (130) can receive data from multiple solar modules included in multiple solar module arrays (S110). Here, the communication unit (130) can connect multiple solar module arrays and the processor (110) in a many-to-one manner through the coupling unit (70).

[0145] For example, the control device (100) can receive data from the solar modules through power line communication by communicating with the solar module arrays through the communication unit (130). The communication unit (130) can receive data in a parallel communication manner through the solar module arrays and the coupling unit (70), and can transmit data to the solar module arrays. The communication unit (130) can transmit and receive signals by being connected to the solar module arrays and a plurality of power lines through the coupling unit (70).

[0146] The communication unit (130) may further include a signal amplifier (150) for amplifying signals transmitted and received through multiple power lines. For example, the signal amplifier (150) may include a line driving circuit or a push-pull circuit.

[0147] The processor (110) can determine the operating status of solar modules based on data received through the communication unit (130) (S120).

[0148] The processor (110) can control the output unit (180) to output a screen indicating the operating status of solar modules (S130).

[0149] For example, the processor (110) can generate a screen showing the operating status of solar modules and solar module arrays and output it through the output unit (180). The processor (110) can calculate the power generation amount and the average power generation amount of the solar modules and output it through the output unit. The processor (110) can output the sum of the power generation amounts of the solar module arrays through the output unit (180). In addition, the processor (110) can calculate power generation statistical data by day, week, month, and year, and power generation statistical data by weather or season and output it through the output unit (180).

[0150] FIG. 10 is a flowchart illustrating another example of a method for controlling a solar module according to one embodiment.

[0151] The flowchart illustrated in Fig. 10 illustrates an example of a method by which a control device (100) controls a solar module. Therefore, even if the details are omitted below, the matters described above with reference to Figs. 1 to 9 may also be applied to the operation of the control device (100) described below with reference to Fig. 10.

[0152] The control device (100) can communicate with solar module arrays through a communication unit (130) and receive data from the solar modules through a power line communication method (S310).

[0153] For example, the communication unit (130) can receive data in a parallel communication manner through the solar module arrays and the coupling unit (70), and transmit data to the solar module arrays. The communication unit (130) can transmit and receive signals by being connected to the solar module arrays and a plurality of power lines through the coupling unit (70).

[0154] For example, the communication unit (130) may further include a signal amplifier (150) for amplifying signals transmitted and received through multiple power lines. The signal amplifier (150) may include a line driving circuit or a push-pull circuit.

[0155] The processor (110) can store data in the memory (120) for each solar module array or each solar module (S320).

[0156] The processor (110) can analyze data of a solar module or solar module array (S330) and generate data on the amount of power produced by each solar module.

[0157] The processor (110) can create a monitoring screen using data of solar modules and solar module arrays, and output the monitoring screen through the output unit (180) (S340).

[0158] For example, the processor (110) can calculate the power generation amount and the average power generation amount of the solar modules, and output the calculated information through a monitoring screen. In addition, the processor (110) can calculate the total power generation amount of the solar module arrays, and output the calculated information through a monitoring screen. In addition, the processor (110) can calculate power generation statistical data by day, week, month, and year, and power generation statistical data by weather or season, and output the calculated information through a monitoring screen.

[0159] In addition, when a failure signal is received through the communication unit (130) (S350), the processor (110) can identify a failed solar module through the ID or identifier included in the failure signal and output information about the failed solar module through the output unit (180) (S360).

[0160] For example, depending on the severity of the failure, some of the operations that the solar module can perform may be limited or the operation of the solar module may be halted by a rapid shutdown function. In this case, the failed solar module may transmit a failure signal to the control device (100).

[0161] The processor (110) can generate a warning about a faulty solar module and output it through the output unit (180) (S370).

[0162] The processor (110) can transmit a signal to control the operation of the remaining solar modules, excluding the faulty solar modules, among all solar modules (S380).

[0163] The communication unit (130) can transmit signals to the solar module arrays through the coupling unit (70). For example, the communication unit (130) can transmit a signal amplified through the signal amplifier (150) to the solar module arrays.

[0164] When response data for a control signal is received, the processor (110) can control the output unit (180) to output data for solar modules (S390).

[0165] FIG. 11 is a drawing showing an example of a monitoring screen for a solar module of an integrated control device according to one embodiment.

[0166] Referring to FIG. 11, the control device (100) can generate a monitoring screen based on data of solar module arrays and solar modules received through the communication unit (130), and output the monitoring screen through the output unit (180).

[0167] For example, the processor (110) can analyze data of solar modules (11 to 10n, 21 to 20N, 31 to 30n) and display the power generation amount (81) of each solar module.

[0168] Additionally, the processor (110) may display an identifier (82) to distinguish each of the solar modules (11 to 10n, 21 to 20N, 31 to 30n). For example, the identifier may include an address, product number, serial number, etc. assigned to each solar module.

[0169] Additionally, the processor (110) can calculate the total power generation and average power generation of a solar module array composed of solar modules (11 to 15, 21 to 20N, 31 to 30n).

[0170] The output unit (180) can display power generation information (91, 92, 93) of the solar module array through a monitoring screen according to the output result of the processor (110).

[0171] Additionally, the processor (110) can identify a faulty solar module (32) for which a fault signal has been received, and display the faulty solar module (32) differently from other solar modules on the monitoring screen. For example, the output unit (180) can display the color or background color of the faulty solar module (32) differently from other solar modules in response to a control signal from the processor (110).

[0172] Additionally, the processor (110) can generate a warning about a faulty solar module (32) and output it through the output unit (180).

[0173] As described above with reference to FIGS. 1 to 11, since the control device (100) is connected to a plurality of solar module arrays through a coupling unit, the control device (100) can receive a communication signal free of unnecessary power or noise. Accordingly, the quality of the communication signal can be improved. In addition, since a plurality of solar module arrays communicate with the control device (100), the structure for communication and control can be simplified and the complexity reduced compared to a conventional solar power generation system.

[0174] Meanwhile, the above-described method can be written as a program that can be executed on a computer, and can be implemented on a general-purpose digital computer that runs the program using a computer-readable recording medium. In addition, the structure of the data used in the above-described method can be recorded on a computer-readable recording medium through various means. The computer-readable recording medium includes storage media such as magnetic storage media (e.g., ROM, RAM, USB, floppy disk, hard disk, etc.) and optical reading media (e.g., CD-ROM, DVD, etc.).

[0175] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention should be defined by the following claims.

Claims

1. A communication unit that receives data from a plurality of photovoltaic modules included in a plurality of photovoltaic module arrays; and A processor that monitors and controls the operating status of the plurality of solar modules based on data received through the communication unit; The above communication department, A device for controlling a solar module, comprising a coupling unit that connects the plurality of solar module arrays and the processor in a many-to-one manner.

2. In paragraph 1, Both ends of the above coupling part are respectively connected to the output terminals of the plurality of solar module arrays and the power line communication module, A device in which a signal applied to one of the above ends is transmitted to the other end.

3. In paragraph 1, The above coupling part, A device comprising at least one of an isolation transformer and an isolation element.

4. In paragraph 1, The above processor, Distinguishing the plurality of solar modules based on an identifier assigned to each of the plurality of solar modules, A device that monitors the operating status by processing data of each of the plurality of solar modules.

5. In paragraph 1, The above processor, A device that outputs information about a faulty solar module based on a fault signal received when a rapid shutdown (RSD) function is executed in at least one of the plurality of solar modules.

6. In paragraph 1, Each of the above plurality of solar modules A device comprising a module level power electronics (MLPE) that performs monitoring and rapid shutdown functions.

7. In paragraph 1, The above communication department, A device further comprising a plurality of connectors, each of which is connected to the solar module arrays and the coupling portion.

8. In paragraph 1, The above communication department, A signal amplifier connected between the communication unit and the plurality of solar module arrays to amplify a signal; and A device further comprising a power line communication module.

9. In paragraph 8, The above signal amplifier, A device connected between the above coupling part and the above power line communication module.

10. In paragraph 8, The number of the above signal amplifiers is, A device corresponding to the number of the above solar module arrays.

11. In paragraph 8, The above signal amplifier, It consists of a line driving circuit, A device that amplifies the signal of the power line communication module and transmits it to the plurality of solar module arrays.

12. In paragraph 11, The above signal amplifier, A device comprising at least one of a driver amplifier and a buffer.

13. In paragraph 8, The above signal amplifier, A device comprising a push-pull circuit in which two amplifiers are connected to operate complementarily.

14. A step in which the communication unit receives data from a plurality of photovoltaic modules included in a plurality of photovoltaic module arrays; A step in which the processor determines the operating status of the solar modules based on data received through the communication unit; and The above processor comprises a step of controlling an output unit to output a screen indicating the operating status of the solar modules; The above communication department, A method for controlling a solar module by connecting a plurality of solar module arrays and the processor in a many-to-one manner through a coupling unit.

15. In paragraph 14, The above communication department, Connecting the above plurality of solar module arrays and the processor through N power lines, The above N corresponds to the number of the plurality of solar module arrays.

16. In paragraph 14, The above judging step is, The step of the processor distinguishing the plurality of solar modules based on an identifier assigned to each of the plurality of solar modules; and A method comprising: a step of monitoring the operating status by processing data of each of the plurality of solar modules by the processor; 17. In paragraph 14, The above judging step is, The step of the processor identifying a faulty solar module based on a fault signal received from at least one of the plurality of solar modules; and A method comprising: a step of controlling the output unit so that the processor outputs information about the faulty solar module.

18. In paragraph 14, A step in which the processor generates individual control commands for each of the plurality of solar module arrays; A step in which the communication unit generates a communication signal for the individual control command; A signal amplifier amplifies the communication signal; and A method further comprising: a step of transmitting the amplified communication signal to the plurality of solar module arrays; 19. In paragraph 18, The above signal amplifier, A method comprising one of a line driving circuit and a push-pull circuit.

20. A computer-readable recording medium recording a program for executing the method of Article 14 on a computer.

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