Apparatus for managing solar modules

Abstract

An apparatus for managing solar modules, according to one aspect, includes: a communication unit for receiving a power line communication signal from at least one solar module array or transmitting the power line communication signal to the at least one solar module array; and a bypass unit for forming a first communication path connecting the communication unit and the at least one solar module array, wherein the first communication path operates as an alternative path for a second communication path connecting the communication unit and an inverter.

Description

Device for managing solar modules

[0001] The present invention relates to a device for managing solar modules. More specifically, the present invention relates to a device for managing a plurality of solar module control devices included in a solar module array using power line communication.

[0002] A solar power generation system can periodically detect the voltage, current, and temperature of solar modules through a solar module control device connected to each solar module, and provide the detected information to the outside through power line communication.

[0003] However, solar power generation systems are configured so that the inverter and the solar module control unit are connected in series. If the inverter is disconnected from the solar power generation system, the power line communication path is interrupted. In this case, information about the solar modules detected by the solar module control unit cannot be confirmed from outside the solar power generation system.

[0004] The purpose of this invention is to provide a device for managing solar modules. The technical challenges to be addressed are not limited to those described above, and other technical challenges may also exist.

[0005] A device for managing a solar module according to one aspect includes: a communication unit for receiving a power line communication signal from at least one solar module array or transmitting a power line communication signal to the at least one solar module array; and a bypass unit for forming a first communication path connecting the communication unit and the at least one solar module array, wherein the first communication path operates as an alternative path of a second communication path connecting the communication unit and an inverter.

[0006] A device for managing a solar module according to another aspect comprises: a communication unit for receiving a power line communication signal from at least one solar module array or transmitting a power line communication signal to the at least one solar module array; at least one first input / output port including a first anode port connected to the at least one solar module array and the communication unit, and a first cathode port connected to the at least one solar module array and an inverter; at least one second input / output port including a second anode port connected to the communication unit and the inverter, and a second cathode port connected to the inverter and the first cathode port; and at least one bypass unit forming a first communication path connecting the communication unit and the first cathode port, wherein the first communication path operates as an alternative path of a second communication path connecting the communication unit and the second anode port.

[0007] Even when the inverter is disconnected from the solar power generation system, a power line communication path between the solar module array and the communication unit can be maintained. Accordingly, management of multiple solar module control devices included in the solar module array can be performed regardless of whether the inverter is disconnected.

[0008] Furthermore, monitoring of multiple solar module control devices can be performed even when the inverter is disconnected from the solar power generation system. This allows for safe installation and maintenance of the solar power generation system.

[0009] FIG. 1 and FIG. 2 are circuit diagrams illustrating an example of a solar module management device according to one embodiment.

[0010] FIG. 3 is a diagram showing an example of the flow of power line communication signals when an inverter according to one embodiment is connected to a solar power generation system.

[0011] FIG. 4 is a diagram showing an example of the flow of power line communication signals when an inverter according to one embodiment is separated from a solar power generation system.

[0012] FIGS. 5 and 6 are drawings illustrating an example of a power line communication process in a solar power generation system to which a solar module management device according to one embodiment is applied.

[0013] FIG. 7 is a circuit diagram illustrating another example of a solar module management device according to one embodiment.

[0014] FIG. 8 is a diagram showing another example of the flow of power line communication signals when an inverter according to one embodiment is connected to a solar power generation system.

[0015] FIG. 9 is a diagram showing another example of the flow of power line communication signals when an inverter according to one embodiment is separated from a solar power generation system.

[0016] FIG. 10 is a drawing for explaining an example of power being supplied to a building in which solar modules are installed according to one embodiment.

[0017] A device for managing a solar module according to one aspect includes: a communication unit for receiving a power line communication signal from at least one solar module array or transmitting a power line communication signal to the at least one solar module array; and a bypass unit for forming a first communication path connecting the communication unit and the at least one solar module array, wherein the first communication path operates as an alternative path of a second communication path connecting the communication unit and an inverter.

[0018] 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.

[0019] When a part of the specification is said to "include" a component, this does not exclude other components, but rather implies the inclusion of other components, unless otherwise specifically stated. Furthermore, terms such as "unit" and "module" used throughout the specification refer to a unit that processes at least one function or operation, which may be implemented in hardware, software, or a combination of hardware and software.

[0020] 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.

[0021] 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.

[0022] FIG. 1 and FIG. 2 are circuit diagrams illustrating an example of a solar module management device according to one embodiment.

[0023] Referring to FIGS. 1 and 2, a solar module management device (hereinafter, module management device) (100) may include a communication unit (110), a connection unit (120), and a bypass unit (130). However, the module management device (100) may further include other components in addition to the components illustrated in FIGS. 1 and 2. Alternatively, some of the components illustrated in FIGS. 1 and 2 may be omitted from the module management device (100).

[0024] The module management device (100) may be a device for managing a plurality of solar module control devices (hereinafter, module control devices) (220) included in a plurality of solar modules (210) included in a solar module array (200). For example, the module management device (100) may be a type of master unit for managing a plurality of module control devices (220).

[0025] The solar module array (200) may include a plurality of solar modules (210). The plurality of solar modules (210) included in the solar module array (200) may be connected to each other in series or parallel. A module control device (220) may be connected to each of the plurality of solar modules (210) included in the solar module array (200). Although FIG. 1 illustrates a single solar module array (200), the present invention is not limited thereto. In other words, depending on the design of the solar power generation system, two or more solar module arrays (200) may be included in the solar power generation system.

[0026] The module control device (220) can detect information (e.g., voltage, current, temperature, etc.) related to the solar module (210) and transmit the detected information to an external device (e.g., module management device (100)) via power line communication. In addition, the module control device (220) can receive an emergency shutdown (RSD, Rapid ShutDown) signal transmitted from an external device (e.g., module management device (100)) via power line communication and, when the emergency shutdown signal is received, can stop the operation of the solar module (210).

[0027] For example, the module control device (220) may be implemented as a module-level power conversion device (or module-level power control device) (hereinafter referred to as 'MLPE'). The module control device (200) may perform various functions, such as a voltage monitoring function, a current monitoring function, a power monitoring function, a temperature monitoring function, and an emergency shutdown function, in order to optimize the power generation performance of the solar module (210). For example, the module control device (220) may also be referred to as an MLPE or an emergency shutdown (RSD, Rapid ShutDown) device.

[0028] For example, an MLPE could be an optimizer or a micro inverter.

[0029] 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.

[0030] 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.

[0031] A module control device (220) may be included in a solar module (210). For example, the module control device (220) may be provided on the back of a solar panel of the solar module (210). The module control device (220) is electrically connected to the solar panel of the solar module (210) and may control the size of the generated current or generated voltage by the solar panel. The solar panel may include a plurality of solar cells. For example, the solar panel may also be referred to as a solar panel or a solar cell.

[0032] The communication unit (110) may be a device for performing communication between the module control device (220) and the inverter (300) and the module management device (100). The communication unit (110) may be connected to the solar module array (200) and the inverter (300) to perform power line communication. The communication unit (110) may transmit a power line communication signal (e.g., an emergency shutdown signal) to the module control device (220) included in the solar module array (200). In addition, the communication unit (110) may receive a power line communication signal (e.g., a signal for information related to the solar module (210)) transmitted from the module control device (220) included in the solar module array (200).

[0033] As illustrated in FIG. 2, the communication unit (110) may include a transmission / reception module (111) and a coupling module (112). However, the components of the communication unit (110) are not limited to those illustrated in FIG. 2, and other components may be further included.

[0034] The transceiver module (111) may include a transceiver and a control device that controls the transceiver. For example, the transceiver module (111) may be a power line communication modem and may perform modulation / demodulation, transmission / reception, etc. for power line communication signals. The coupling module (112) may include a coupling transformer that couples and separates a power signal and a power line communication signal, and a coupling capacitor that is directly connected to the coupling transformer and forms an LC filter.

[0035] The communication unit (110) may be connected to a processor configured to control the communication unit (110). The processor may receive a power line communication signal (e.g., a signal regarding information related to a solar module (210)) through the communication unit (110) and process (store and manage) the received power line communication signal. The processor may generate a power line communication signal (e.g., an emergency shutdown signal) when a preset condition is satisfied or a user input is received, and transmit the generated power line communication signal to an external device (e.g., a solar module array (200)).

[0036] For example, a processor can process instructions from a computer program by performing basic arithmetic, logic, and input / output operations. These instructions may be provided from memory or an external device. Furthermore, the processor can generally control the operation of other components included in the communication unit (110).

[0037] Meanwhile, the processor 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 (AI) algorithm. Examples of neural networks may include models such as a convolutional neural network (CNN), a deep neural network (DNN), or a recurrent neural network (RNN).

[0038] For example, a processor may be implemented as an array of a number of logic gates, or it may be implemented as a combination of a general-purpose microprocessor and a memory storing a program executable on the microprocessor. For example, a processor 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 also 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 in conjunction with a digital signal processor (DSP) core, or any other such combination of configurations.

[0039] Referring back to FIG. 1, the connection unit (120) can connect the communication unit (110) and the inverter (300). The connection unit (120) can electrically connect one end of the communication unit (110) and the positive pole of the inverter (300) via a power line. Specifically, a switch (400) that controls the connection of the inverter (300) can be connected to the positive pole of the inverter (300), and the connection unit (120) can be configured to connect the communication unit (110) and the switch (400).

[0040] Meanwhile, although the switch (400) is described as being provided on the outside of the inverter (300) in the above-described embodiment, the switch (400) may also be provided on the inside of the inverter (300). For example, the switch (400) may be provided on both the positive and negative poles of the inverter (300), but is not limited thereto. In other words, the switch (400) may be provided on only one of the positive and negative poles of the inverter (300).

[0041] The bypass unit (130) can connect the communication unit (110) and the solar module array (200). The bypass unit (130) can electrically connect one end of the communication unit (110) and the cathode of the solar module array (200).

[0042] The communication path formed by the bypass unit (130) may correspond to an alternative path for the communication path formed by the connection unit (120). In other words, the first communication path through which the communication unit (110) and the solar module array (200) are connected by the bypass unit (130) may function as an alternative path for the second communication path through which the communication unit (110) and the inverter (300) are connected by the connection unit (120).

[0043] For example, when the inverter (300) is disconnected from the solar power generation system, the bypass unit (130) can connect the solar module array (200) and the communication unit (110) to form a closed circuit. The bypass unit (130) can connect the solar module array (200) and the communication unit (110) to each other in a situation where the inverter (300) is disconnected from the solar power generation system, thereby enabling power line communication between the solar module array (200) and the communication unit (110).

[0044] For example, the bypass unit (130) may include an AC coupling capacitor (131) that passes a power line communication signal. The AC coupling capacitor (131) may pass a power line communication signal transmitted through a power line and block a power signal transmitted through the power line. That is, the AC coupling capacitor (131) may pass an AC signal flowing through a power line and block a DC signal flowing through the power line.

[0045] FIG. 3 is a diagram showing an example of the flow of power line communication signals when an inverter according to one embodiment is connected to a solar power generation system.

[0046] Referring to FIG. 3, when the inverter (300) is normally connected to the solar power generation system, the power line communication signal can flow as indicated by the arrow. In other words, when the inverter (300) is connected to the solar power generation system, the power line communication signal can be transmitted and received through the second communication path. For example, when the switch (400) connected to the inverter (300) is in the ON state, the power line communication signal can flow through the power line communication path (i.e., the second communication path) formed in the order of one of the positive and negative poles of the solar module array (200) (e.g., the positive pole) - communication unit (110) - inverter (300) - the other of the positive and negative poles of the solar module array (200) (e.g., the negative pole).

[0047] FIG. 4 is a diagram showing an example of the flow of power line communication signals when an inverter according to one embodiment is separated from a solar power generation system.

[0048] Referring to FIG. 4, when the inverter (300) is separated from the solar power generation system, the power line communication signal can flow as indicated by the arrow. In other words, when the inverter (300) is separated from the solar power generation system, the power line communication signal can be transmitted and received through the first communication path. For example, when the switch (400) connected to the inverter (300) is in the OFF state, the power line communication signal can flow through the power line communication path (i.e., the first communication path) formed in the order of one of the positive and negative poles of the solar module array (200) (e.g., the positive pole) - the communication unit (110) - the other of the positive and negative poles of the solar module array (200) (e.g., the negative pole).

[0049] As described above, the module management device (100) according to one embodiment maintains a power line communication path with the solar module array (200) even when the inverter (300) is separated from the solar power generation system, thereby enabling management of a plurality of module control devices (220) included in the solar module array (200) to be performed regardless of whether the inverter (300) is separated.

[0050] In addition, the present embodiment maintains a power line communication path with the solar module array (200) even when the inverter (300) is separated from the solar power generation system, thereby enabling monitoring of the module control device (200) even when the inverter (300) is separated from the solar power generation system. Accordingly, installation or maintenance work of the solar power generation system can be performed safely.

[0051] FIGS. 5 and 6 are drawings illustrating an example of a power line communication process in a solar power generation system to which a solar module management device according to one embodiment is applied.

[0052] Referring to FIGS. 5 and 6, the solar power generation system may include a module management device (100), a plurality of solar modules (210), a plurality of module control devices (220), an inverter (300), a server (500), and an energy management system (EMS) (600). However, the solar power generation system may further include other components in addition to the components illustrated in FIGS. 5 and 6. Alternatively, some of the components illustrated in FIGS. 5 and 6 may be omitted from the solar power generation system.

[0053] The server (500) can generate a control signal for controlling the solar module (210) according to user input and transmit the control signal to the energy management system (600). In addition, the server (500) can receive a signal (e.g., a monitoring signal, etc.) transmitted from the energy management system (600) and provide the received signal to the user.

[0054] The energy management system (600) can receive a control signal transmitted from the server (500) and transmit the received control signal to the module management device (100). The energy management system (600) can receive a signal (e.g., a monitoring signal, etc.) transmitted from the module management device (100) and transmit the received signal to the server (500).

[0055] The module management device (100) can receive a control signal transmitted from the energy management system (600) and transmit the received control signal to the module control device (220). The module management device (100) can receive a signal (e.g., a monitoring signal, etc.) transmitted from the module control device (220) and transmit the received signal to the energy management system (600).

[0056] When an inverter (300) is connected to a solar power generation system, a power line communication path indicated by a dotted line in Fig. 5 can be formed. When an inverter (300) is connected to a solar power generation system, the module management device (100) can transmit and receive signals through the power line communication path indicated by a dotted line in Fig. 5.

[0057] Meanwhile, when the inverter (300) is separated from the solar power generation system, a power line communication path indicated by a dotted line in FIG. 6 may be formed. That is, when the inverter (300) is separated from the solar power generation system, a power line communication path may be formed excluding the inverter (300). The module management device (100) may transmit and receive signals through the power line communication path indicated by a dotted line in FIG. 6 when the inverter (300) is separated from the solar power generation system.

[0058] In this way, the present embodiment enables communication between the server (500), the energy management system (600), the module management device (100), and the solar module array (i.e., a plurality of solar modules (210) and a plurality of module control devices (220)) at all times, regardless of whether the inverter (300) is separated from the solar power generation system. Accordingly, the safety of the solar power generation system can be improved.

[0059] FIG. 7 is a circuit diagram illustrating another example of a solar module management device according to one embodiment.

[0060] Referring to FIG. 7, the module management device (100) may include a communication unit (110), a connection unit (120), a bypass unit (130), a first input / output port (140), and a second input / output port (150). For example, the module management device (100) illustrated in FIG. 7 may further include a first input / output port (140) and a second input / output port (150) in addition to the module management device (100) illustrated in FIG. 1. Hereinafter, detailed descriptions of components included in FIG. 7 that are identical to those in FIG. 1 will be omitted.

[0061] The first input / output port (140) may include a first positive port (141) and a first negative port (142). The first positive port (141) may be configured to be connected to the positive electrode and the communication unit (110) of the solar module array (200).

[0062] For example, the first positive port (141) and the positive pole of the solar module array (200) may be connected via a power line. The first negative port (142) may be configured to be connected to the negative pole of the solar module array (200) and the inverter (300). The first negative port (142) and the negative pole of the solar module array (200) may be connected via a power line.

[0063] The second input / output port (150) may include a second positive port (151) and a second negative port (152). The second positive port (151) may be configured to be connected to the positive terminal of the inverter (300) and the communication unit (110).

[0064] For example, the second positive port (151) and the positive pole of the inverter (300) may be connected via a power line. The second negative port (152) may be configured to be connected to the negative pole of the inverter (300) and the first negative port (142). The second negative port (152) and the negative pole of the inverter (300) may be connected via a power line.

[0065] For example, the first and second input / output ports (140, 150) may be implemented through one connector or may be implemented through individual connectors.

[0066] The connection unit (120) may be configured to connect the communication unit (110) and the second positive port (151). The connection unit (120) may electrically connect one end of the communication unit (110) and the second positive port (151) via a power line. That is, the communication unit (110) and the second positive port (151) may be connected to each other via the connection unit (120).

[0067] The bypass unit (130) may be configured to connect the communication unit (110) and the first cathode port (142). The bypass unit (130) may electrically connect one end of the communication unit (110) and the first cathode port (142) via a power line. The bypass unit (130) may correspond to an alternative path for the connection unit (120). In other words, the first communication path through which the communication unit (110) and the first cathode port (142) are connected by the bypass unit (130) may operate as an alternative path for the second communication path through which the communication unit (110) and the second anode port (151) are connected by the connection unit (120).

[0068] FIG. 8 is a diagram showing another example of the flow of power line communication signals when an inverter according to one embodiment is connected to a solar power generation system.

[0069] Referring to FIG. 8, when the inverter (300) is normally connected to the solar power generation system, the power line communication signal can flow as indicated by the arrow. In other words, when the inverter (300) is connected to the solar power generation system, the power line communication signal can be transmitted and received through the second communication path. For example, when the switch (400) connected to the inverter (300) is in the ON state, the power line communication signal can flow through the power line communication path (i.e., the second communication path) formed in the following order: one of the positive and negative poles (e.g., the positive pole) of the solar module array (200) - the first positive port (141) - the communication unit (110) - the second positive port (400) - the inverter (300) - the second negative port (400) - the first negative port (142) - one of the positive and negative poles (e.g., the negative pole) of the solar module array (200).

[0070] FIG. 9 is a diagram showing another example of the flow of power line communication signals when an inverter according to one embodiment is separated from a solar power generation system.

[0071] Referring to FIG. 9, when the inverter (300) is separated from the solar power generation system, the power line communication signal can flow as indicated by the arrow. In other words, when the inverter (300) is separated from the solar power generation system, the power line communication signal can be transmitted and received through the first communication path. For example, when the switch (400) connected to the inverter (300) is in the OFF state, the power line communication signal can flow through the power line communication path (i.e., the first communication path) formed in the order of one of the positive and negative poles of the solar module array (200) (e.g., the positive pole) - the first positive port (141) - the communication unit (110) - the first negative port (142) - one of the positive and negative poles of the solar module array (200) (e.g., the negative pole).

[0072] FIG. 10 is a drawing for explaining an example of power being supplied to a building in which solar modules are installed according to one embodiment.

[0073] Referring to FIG. 10, solar modules (2) can be installed on the roof of a building to generate electricity. The solar modules (2) can form at least one solar module array.

[0074] The inverter (6) can convert the power generated from the solar modules (2) and supply it into the building (1).

[0075] Meanwhile, commercial power transmitted through the power line (3) can be supplied to the building through the transformer (4).

[0076] 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).

[0077] 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.

[0078] The solar modules (2) can form at least one solar module array. For example, the solar module array can include one output terminal.

[0079] Meanwhile, solar modules (2) may include MLPE.

[0080] For example, the MLPE device can monitor the status or power generation of solar modules (2) and transmit data to an external device. In addition, the MLPE can perform emergency shutdown and stop the operation of the solar module depending on the degree of failure of the solar module.

[0081] Additionally, at least one of the solar modules (2) and the MLPEs may include a communication module for power line communication.

[0082] As described above, the module management device (100) according to one embodiment maintains a power line communication path with the solar module array (200) even when the inverter (300) is separated from the solar power generation system, thereby enabling stable management of a plurality of module control devices (220) included in the solar module array (200) regardless of whether the inverter (300) is separated.

[0083] In addition, the module management device (100) according to one embodiment maintains a power line communication path with the solar module array (200) even when the inverter (300) is separated from the solar power generation system, thereby enabling monitoring of the module control device (200) while the inverter (300) is separated from the solar power generation system. Accordingly, installation work or maintenance work of the solar power generation system can be performed safely.

[0084] The implementations described herein may be implemented, for example, as a method or process, a device, a software program, a data stream, or a signal. Even if discussed only in the context of a single form of implementation (e.g., discussed only as a method), the implementation of the discussed features may also be implemented in other forms (e.g., as a device or program). The device may be implemented using suitable hardware, software, firmware, and the like.

[0085] 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. Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

Claims

1. A communication unit that receives a power line communication signal from at least one solar module array or transmits a power line communication signal to the at least one solar module array; and A bypass unit forming a first communication path connecting the communication unit and the at least one solar module array; The above first communication path is, A device for managing a solar module that operates as an alternative path for a second communication path connecting the above communication unit and the inverter.

2. In paragraph 1, A device in which the power line communication signal is transmitted and received through the second communication path when the inverter is connected to the solar power generation system, and the power line communication signal is transmitted and received through the first path when the inverter is disconnected from the solar power generation system.

3. In paragraph 2, The above second communication path is, A device formed by sequentially connecting one of the positive and negative poles of the at least one solar module array, the communication unit, the inverter, and the other of the positive and negative poles of the at least one solar module array.

4. In paragraph 2, The above first communication path is, A device formed by sequentially connecting one of the positive and negative poles of the at least one solar module array, the communication unit, the bypass unit, and the other of the positive and negative poles of the at least one solar module array.

5. In paragraph 1, The above bypass section, A device comprising an AC coupling capacitor for passing the above power line communication signal.

6. In paragraph 1, The above communication department, Powerline communication modem; A coupling transformer connected to the power line communication modem and coupling or separating the power line communication signal and the power signal; and A device comprising a coupling capacitor connected to the above coupling transformer and constituting an LC filter.

7. In paragraph 1, The above solar module array, solar modules; and Module level power electronics connected to the above solar modules; Each of the above solar modules is a device connected to each of the above module unit power conversion devices.

8. In paragraph 7, The above module level power electronics device, A device comprising an optimizer or micro inverter.

9. A communication unit for receiving a power line communication signal from at least one solar module array or transmitting a power line communication signal to the at least one solar module array; At least one first input / output port including a first positive port connected to at least one solar module array and the communication unit, and a first negative port connected to at least one solar module array and the inverter; At least one second input / output port including a second positive port connected to the communication unit and the inverter, and a second negative port connected to the inverter and the first negative port; and At least one bypass section forming a first communication path connecting the communication section and the first cathode port; The above first communication path is, A device for managing a solar module that operates as an alternative path for a second communication path connecting the above communication unit and the second anode port.

10. In paragraph 9, A device in which the power line communication signal is transmitted and received through the second communication path when the inverter is connected to the solar power generation system, and the power line communication signal is transmitted and received through the first path when the inverter is disconnected from the solar power generation system.

11. In paragraph 10, The above second communication path is, A device formed by sequentially connecting one of the positive and negative poles of the at least one solar module array, the first positive port, the communication unit, the second positive port, the inverter, the second negative port, the first negative port, and the other of the positive and negative poles of the at least one solar module array.

12. In paragraph 10, The above first communication path is, A device formed by sequentially connecting one of the positive and negative poles of the at least one solar module array, the first positive port, the communication unit, the bypass unit, the first negative port, and the other of the positive and negative poles of the at least one solar module array.

13. In paragraph 9, The above bypass section, A device comprising an AC coupling capacitor for passing the above power line communication signal.

14. In paragraph 9, The above communication department, Powerline communication modem; A coupling transformer connected to the power line communication modem and coupling or separating the power line communication signal and the power signal; and A device comprising a coupling capacitor connected to the above coupling transformer and constituting an LC filter.

15. In paragraph 9, The above solar module array, solar modules; and Module level power electronics connected to the above solar modules; Each of the above solar modules is a device connected to each of the above module unit power conversion devices.

16. In paragraph 15, The above module level power electronics device, A device comprising an optimizer or micro inverter.

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