Solar module control device, solar module management device, and control method thereof

Abstract

A device according to an aspect comprising: a communication unit for communicating with an external device; a shutdown unit for performing a rapid shutdown on a solar module; and a processor connected to the communication unit and the shutdown unit, wherein the processor may identify the type of a signal received through the communication unit and, if the identified type of signal is a rapid shutdown signal, control the shutdown unit so that a rapid shutdown is performed on the solar module.

Description

Solar module control device, solar module management device and control method thereof

[0001] The present invention relates to a solar module control device, a solar module management device, and a control method thereof applied to a solar power generation system.

[0002] A solar power generation system is a system that converts sunlight into electrical energy and supplies it. It consists of solar panels that generate electricity using sunlight, an inverter that converts the direct current generated by the solar panels into alternating current, and a battery that stores the electrical energy generated by the solar panels.

[0003] Meanwhile, to minimize damage to solar power systems caused by abnormal situations such as fire, a junction box is installed. The junction box is equipped with various sensors, protectors, and circuit breakers to detect abnormal situations and prevent the spread of damage when they occur. The installation of various equipment in the junction box increases the installation cost of the solar power system.

[0004] Additionally, there is a problem that monitoring of solar modules cannot be performed when the power to the solar modules is cut off at the connection panel, etc. due to an abnormal situation.

[0005] Therefore, a method is needed to control solar modules more quickly and easily in the event of an abnormal situation, such as a fire. Furthermore, a method is needed to monitor solar modules even in the event of an abnormal situation.

[0006] The technical problem of the present invention is to provide a solar module control device, a solar module management device, and a method for controlling the same.

[0007] A device according to one aspect includes a communication unit for communicating with an external device; a blocking unit for performing an emergency shutdown (rapid shutdown) on a solar module; and a processor connected to the communication unit and the blocking unit, wherein the processor can identify a type of signal received through the communication unit and control the blocking unit to perform an emergency shutdown on the solar module when the type of the signal is an emergency shutdown signal.

[0008] A device for managing a solar module control device according to another aspect includes a first communication unit for communicating with an external device; a second communication unit for communicating with a plurality of solar module control devices; and a processor connected to the first and second communication units, wherein the processor generates a monitoring request signal according to a preset cycle and transmits it through the second communication unit, and when a warning signal is received through the first communication unit, stops generating and transmitting the monitoring request signal, generates an emergency blocking signal, and transmits the emergency blocking signal through the second communication unit.

[0009] A method for controlling a solar module management device according to another aspect may include: a step of generating a monitoring request signal according to a preset cycle and transmitting the monitoring request signal to a solar module control device; a step of stopping the generation and transmission of the monitoring request signal and generating an emergency blocking signal when a warning signal is received from an external device; and a step of transmitting the emergency blocking signal to a plurality of solar module control devices.

[0010] FIG. 1 is a diagram illustrating an example of a solar power generation system according to one embodiment.

[0011] Figures 2 to 4 are flowcharts illustrating examples of a communication process of a solar power generation system according to one embodiment.

[0012] FIG. 5 is a diagram illustrating an example of a solar module management device according to one embodiment.

[0013] FIGS. 6 and 7 are flowcharts illustrating examples of a control method of a solar module management device according to one embodiment.

[0014] FIG. 8 is a drawing illustrating an example of a solar module control device according to one embodiment.

[0015] FIGS. 9 to 11 are flowcharts illustrating examples of a control method of a solar module control device in one embodiment.

[0016] FIG. 12 is a drawing showing an example of a power supply structure of a building in which solar modules are installed according to one embodiment.

[0017] A device according to one aspect includes a communication unit for communicating with an external device; a blocking unit for performing an emergency shutdown (rapid shutdown) on a solar module; and a processor connected to the communication unit and the blocking unit, wherein the processor can identify a type of signal received through the communication unit and control the blocking unit to perform an emergency shutdown on the solar module when the type of the signal is an emergency shutdown signal.

[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 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.

[0020] Additionally, terms including ordinal numbers, such as "first" or "second," used in the specification may be used to describe various components or embodiments, but the components or embodiments should not be limited by the terms. The terms may be used to distinguish one component or embodiment 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 is a diagram illustrating an example of a solar power generation system according to one embodiment.

[0023] Referring to FIG. 1, a solar power generation system may include a device (hereinafter, a module management device) (100) for managing solar modules (300), devices (hereinafter, a module control device) (200) for controlling solar modules (300), and solar modules (300). In addition to the components illustrated in FIG. 1, the solar power generation system may further include various components, or may omit some of the above components.

[0024] The module management device (100) may be a device for managing module control devices (200) included in a solar power generation system. The module management device (100) may communicate with each of the module control devices (200) to transmit and receive various data necessary for managing the module control devices (200). The module management device (100) may be a type of master unit for managing the module control devices (200).

[0025] For example, the module management device (100) can communicate with the module control devices (200) via power line communication (PLC). However, the communication method between the module management device (100) and the module control devices (200) is not limited to power line communication.

[0026] The module management device (100) can transmit a monitoring request signal to the module control devices (200). Here, the monitoring request signal can include a command requesting information related to the solar module (300). For example, the module management device (100) can periodically generate the monitoring request signal. For example, the module management device (100) can determine the target of the monitoring request signal (e.g., the monitoring target) among the solar modules (300) according to a preset order.

[0027] The module management device (100) can receive monitoring signals transmitted from the module control devices (200) in response to a monitoring request signal. The module management device (100) can collect and store the monitoring signals. Here, the monitoring signals can include information related to the solar modules (300) detected by the module control devices (200).

[0028] For example, information related to solar modules (300) may include at least one of information regarding current, voltage, and temperature of each of the solar modules (300). However, information related to the solar modules (300) is not limited to what has been described above. Information related to the solar modules (300) may include various information that affects the power generation performance of the solar modules (300). For example, monitoring signals may be used to manage a solar power generation system.

[0029] The module management device (100) can transmit an emergency shutdown (RSD, Rapid Shut Down) signal to the module control devices (200). Here, the emergency shutdown signal can include a command to emergency shutdown at least one of the solar modules (300). For example, a command to operate (open) a circuit breaker connected to each of the solar modules (300) can be included in the emergency shutdown signal. The commands included in the emergency shutdown signal are not limited to those described above. For example, various commands to satisfy the emergency shutdown requirements of a solar power generation system stipulated in the NEC (National Electric Code) standard can be included in the emergency shutdown signal.

[0030] The module management device (100) can receive a warning signal transmitted from an external device (10). The module management device (100) can generate an emergency shutdown signal when a warning signal is received. Here, the external device (10) can include at least one of a power control system (PCS) (11) and an input device (12).

[0031] The power control device (11) may be a device that controls an inverter connected to solar modules (300). For example, the power control device (11) may generate a warning signal based on the status of the inverter.

[0032] The input device (12) may be a type of emergency switch (e.g., a button) capable of receiving user input. For example, the input device (12) may generate a warning signal when a user input is received. However, the external device (10) is not limited to the above-described device, and various devices capable of checking for abnormalities in the solar module (300) may be included in the external device (10). For example, the module management device (100) may receive a warning signal transmitted from the external device (10) via wired or wireless communication.

[0033] The module management device (100) can receive a warning stop signal transmitted from an external device (10). In addition, the module management device (100) can generate an emergency block release signal when a warning stop signal is received.

[0034] For example, the power control device (11) can generate a warning stop signal based on the status of the inverter. Meanwhile, the input device (12) can generate a warning stop signal when a user input is received.

[0035] For example, the module management device (100) may transmit an emergency blocking release signal to at least one of the module control devices (200). Here, the emergency blocking release signal may include a command to release an emergency blocking currently being implemented in at least one of the solar modules (300). For example, a command to stop the operation of a circuit breaker connected to the solar modules (300) (a command to turn the circuit breaker on) may be included in the emergency blocking release signal. However, the commands included in the emergency blocking release signal are not limited to those described above.

[0036] Module control devices (200) may be devices for managing solar modules (300). Module control devices (200) may be a type of slave unit managed by module management device (100). For example, module control devices (200) may perform functions related to rapid shut down, monitoring, and power generation efficiency optimization. Module control devices (200) may also be referred to as monitoring devices, rapid shut down devices, power generation efficiency optimization devices, or module level power electronics (MLPE).

[0037] For example, the modular power conversion device may be a DC optimizer or a micro-inverter.

[0038] For example, if the module-based power conversion device is a DC optimizer, a single DC optimizer may be connected to a single solar module (300). Additionally, the DC optimizer may be connected to an inverter. In this case, the DC optimizer may optimize the power output from the solar module (300) and output it to an inverter (e.g., a string inverter). The current converted by the inverter (e.g., converting direct current to alternating current) may be output to a load or a power grid.

[0039] As another example, if the module-based power conversion device is a microinverter, a single microinverter may be connected to a single solar module (300). In this case, the microinverter may convert the power generated by the solar module (300), and the converted current may be output to a load or power grid.

[0040] The module control devices (200) can receive a monitoring request signal transmitted from the module management device (100). For example, when a monitoring request signal is received, the module control devices (200) can detect information related to solar modules (300) and transmit the detected information to the module management device (100).

[0041] For example, the module control devices (200) can receive an emergency blocking signal transmitted from the module management device (100). When the emergency blocking signal is received, the module control devices (200) can perform an emergency blocking on at least one of the solar modules (300).

[0042] For example, the module control devices (200) can perform an emergency shutdown by turning on the circuit breaker connected to each of the solar modules (300) to cut off the power to the solar modules (300). However, the means and methods for the emergency shutdown are not limited to those described above. The module control device (200) can perform an emergency shutdown of the solar modules (300) by using various means and methods to satisfy the emergency shutdown requirements of the solar power generation system specified in the NEC (National Electric Code) standard.

[0043] For example, the module control devices (200) can receive an emergency blocking release signal transmitted from the module management device (100). When the emergency blocking release signal is received, the module control devices (200) can release the emergency blocking currently being implemented for any one of the solar modules (300). For example, the module control devices (200) can release the emergency blocking currently being implemented by turning off the circuit breaker connected to the solar modules (300) to restore power to the solar modules (300).

[0044] Figures 2 to 4 are flowcharts illustrating examples of a communication process of a solar power generation system according to one embodiment.

[0045] Figure 2 is a first flowchart of a communication process of a solar power generation system according to one embodiment.

[0046] Referring to FIG. 2, the process of a solar power generation system performing monitoring on solar modules (300) is described.

[0047] The module management device (100) can generate a monitoring request signal. For example, the module management device (100) can periodically generate a monitoring request signal (S201).

[0048] The module management device (100) can transmit a monitoring request signal to each of the module control devices (200) (S203).

[0049] The module control devices (200) can generate a monitoring signal in response to receiving a monitoring request signal (S205). For example, the module control devices (200) can generate a monitoring signal based on the results of monitoring a solar module (300).

[0050] Next, the module control devices (200) can transmit a monitoring signal to the module management device (100) (S207).

[0051] Figure 3 is a second flowchart for a communication process of a solar power generation system according to one embodiment.

[0052] Referring to FIG. 3, the process of a solar power generation system performing an emergency shutdown on a solar module (300) is described.

[0053] The external device (10) can generate a warning signal (S301). For example, the external device (10) can generate a warning signal when an error occurs in the inverter. As another example, the external device (10) can generate a warning signal when a user input is received.

[0054] An external device (10) can transmit a warning signal to the module management device (100) (S303).

[0055] The module management device (100) may generate an emergency shutdown signal in response to receiving a warning signal (S305). For example, if a warning signal is received, the module management device (100) may determine that there is a need to perform an emergency shutdown on at least one of the solar modules (300), and may generate an emergency shutdown signal.

[0056] The module management device (100) can transmit an emergency blocking signal to each of the module control devices (200) (S307).

[0057] The module control device (200) can perform an emergency shutdown in response to receiving an emergency shutdown signal (S309). For example, the module control device (200) can perform an emergency shutdown by turning on a circuit breaker connected to the solar modules (300) to cut off power to the solar modules (300).

[0058] Figure 4 is a third flowchart for a communication process of a solar power generation system according to one embodiment.

[0059] Referring to Fig. 4, the process of a solar power generation system releasing an emergency block on a solar module is described.

[0060] The external device (10) may generate a warning stop signal (S401). For example, if an abnormality occurring in the inverter has been resolved, the external device (10) may generate a warning stop signal. As another example, the external device (10) may generate a warning stop signal when a user input is received.

[0061] The external device (10) can transmit a warning stop signal to the module management device (100) (S403).

[0062] The module management device (100) may generate an emergency blocking release signal in response to receiving a warning stop signal (S405). For example, if a warning stop signal is received, the module management device (100) may determine that there is a need to stop the emergency blocking of the solar modules (300) and generate an emergency blocking release signal.

[0063] The module management device (100) can transmit an emergency blocking release signal to each of the module control devices (200) (S407).

[0064] The module control devices (200) can stop the emergency shutdown in progress in response to receiving an emergency shutdown release signal (S409). For example, the module control devices (200) can stop the emergency shutdown in progress by turning off the circuit breaker connected to the solar modules (300) to restore power to the solar modules (300).

[0065] FIG. 5 is a diagram illustrating an example of a solar module management device according to one embodiment.

[0066] Referring to FIG. 5, the module management device (100) may include a first communication unit (110), a second communication unit (120), a memory (130), and a processor (140). For example, each component included in the module management device (100) may be connected through a common bus, or may be connected through individual interfaces or individual buses centered around the processor (140). The module management device (100) according to one embodiment may further include various components in addition to the components illustrated in FIG. 5, or may omit some of the above components. In addition, the first communication unit (110) and the second communication unit (120) may be a single communication module.

[0067] The first communication unit (110) may be a device for performing communication with an external device (10). For example, the first communication unit (110) may perform communication with the external device (10) according to various types of communication methods. The first communication unit (110) may include a communication modem that supports wired or wireless communication with the external device (10).

[0068] The second communication unit (120) may be a device for communicating with module control devices (200) connected to solar modules (300). For example, the second communication unit (120) may communicate with at least one of the module control devices (200) according to various types of communication methods. The second communication unit (120) may include a communication modem that supports power line communication.

[0069] The memory (130) may store various types of information required during the operation of the processor (140). In addition, the memory (130) may store various types of information generated during the operation of the processor (140).

[0070] The processor (140) may be connected to the first communication unit (110), the second communication unit (120), and the memory (130). For example, the processor (140) may be implemented as a central processing unit (CPU), a micro controller unit (MCU), or a system on chip (SoC). In addition, the processor (140) may control a plurality of hardware or software connected to the processor (140) by running an operating system or an application. In addition, the processor (140) may perform various data processing and calculations. In addition, the processor (140) may execute at least one command stored in the memory (130) and store data generated according to the execution result in the memory (130).

[0071] For example, the processor (140) may generate a monitoring request signal according to a preset cycle and transmit it through the second communication unit (120). In addition, the processor (140) may receive a warning signal received from an external device (10) through the first communication unit (110). In addition, when a warning signal is received through the first communication unit (110), the processor (140) may stop generating and transmitting the monitoring request signal and then generate an emergency blocking signal.

[0072] For example, the processor (140) may transmit an emergency blocking signal to the module control devices (200) through the second communication unit (120). The processor (140) may transmit the emergency blocking signal to the module control devices (200) using a broadcasting method. Here, the broadcasting method may mean a method of simultaneously transmitting data to all module control devices (200) connected to a shared transmission medium (e.g., power line) of the solar power generation system.

[0073] For example, after the transmission of the emergency blocking signal is completed, the processor (140) can resume the generation and transmission of the monitoring request signal that was interrupted.

[0074] FIGS. 6 and 7 are flowcharts illustrating examples of a control method of a solar module management device according to one embodiment.

[0075] Fig. 6 is a first flowchart of a control method of a module management device according to one embodiment.

[0076] Referring to Fig. 6, a method for controlling a module management device (100) is described. However, some of the steps illustrated in Fig. 6 may be performed in a different order from the order illustrated in Fig. 6 or may be omitted.

[0077] The processor (140) can determine whether a signal has been received via the first communication unit (110) (S601). In step S601, the processor (140) can determine whether a warning signal or a warning release signal has been received from an external device (10). For example, the processor (140) can perform step S601 at preset intervals.

[0078] If no signal is received via the first communication unit (110), the processor (140) can determine the target solar module according to a preset order (S603). In other words, the processor (140) can determine the target solar module to be monitored among the solar modules (300). For example, the order of determining the target solar module can be preset by considering the location, connection structure, etc. of the solar modules (300).

[0079] The processor (140) can identify identification information (e.g., an identification number) of a module control device connected to a target solar module (S605). For example, relationship information matching the identification information of the module control device with the solar module may be pre-stored in the memory (130). Accordingly, the processor (140) can detect identification information of the module control device corresponding to the target solar module from the memory (130).

[0080] The processor (140) can generate a monitoring request signal including identification information of the module control device (S607).

[0081] The processor (140) can transmit a monitoring request signal through the second communication unit (120) (S609).

[0082] Meanwhile, when a signal is received through the first communication unit (110), the processor (140) can determine whether the received signal is a warning signal (S611). In step S611, the processor (140) can confirm whether the signal received through the first communication unit (110) is a warning signal.

[0083] If the signal received via the first communication unit (110) is a warning signal, the processor (140) may generate an emergency shutdown signal (S613). For example, if a warning signal is received via the first communication unit (110), the processor (140) may determine that there is a need to perform an emergency shutdown on at least one of the solar modules (300), and may generate an emergency shutdown signal.

[0084] The processor (140) can transmit an emergency shutdown signal via the second communication unit (120) (S615). In step S615, the processor (140) can broadcast the emergency shutdown signal to all module control devices (200) included in the solar power generation system. Since the emergency shutdown signal is transmitted to all module control devices (200) via broadcasting, the time required to propagate the emergency shutdown signal can be reduced. Accordingly, an emergency shutdown can be quickly implemented for at least one of the solar modules (300).

[0085] If the signal received via the first communication unit (110) is not a warning signal, the processor (140) may generate an emergency blocking release signal (S617). For example, if the signal received via the first communication unit (110) is a warning release signal, the processor (140) may generate an emergency blocking release signal.

[0086] The processor (140) can transmit an emergency blocking release signal through the second communication unit (120) (S619). In step S619, the processor (140) can broadcast the emergency blocking release signal to all module control devices (200) included in the solar power generation system.

[0087] Meanwhile, although the emergency blocking signal or emergency blocking release signal has been described as being transmitted via broadcasting, this is not limited thereto. For example, the module management device (100) may also transmit the emergency blocking signal or emergency blocking release signal via unicasting or multicasting.

[0088] Fig. 7 is a second flowchart for a control method of a module management device according to one embodiment.

[0089] Referring to FIG. 7, a control method of a module management device (100) according to one embodiment will be described. The process illustrated in FIG. 7 may be performed after transmitting an emergency blocking signal. Additionally, some of the steps described below with reference to FIG. 7 may be performed in a different order than that illustrated in FIG. 7 or may be omitted.

[0090] The processor (140) can determine whether an emergency shutdown failure signal has been received via the second communication unit (120) (S701). For example, the emergency shutdown failure signal may be a signal set to be generated by the module control devices (200) when an emergency shutdown of the solar modules (300) is not normally performed.

[0091] If an emergency blocking failure signal is received via the second communication unit (120), the processor (140) may generate a notification message (S703). For example, if an emergency blocking failure signal is received, the processor (140) may generate a notification message to notify the administrator of the fact.

[0092] The processor (140) may transmit a notification message to a preset user terminal (S705). For example, the processor (140) may notify the administrator of the failure of the emergency blocking by transmitting the notification message to the administrator's user terminal. Alternatively, the processor (140) may transmit the notification message to the user terminal via the first communication unit (110) or a separate communication device. In response to receiving an emergency blocking failure signal, the processor (140) may output a warning signal to the surroundings via an output interface (e.g., a speaker, a display, an LED, etc.).

[0093] Meanwhile, although it has been described that the notification message is transmitted to the user terminal by the module control device (200), it is not limited thereto. For example, the notification message may also be transmitted to the user terminal by the power control device (11).

[0094] FIG. 8 is a drawing illustrating an example of a solar module control device according to one embodiment.

[0095] Referring to FIG. 8, the module control device (200) may include a communication unit (210), a sensor unit (220), a blocking unit (230), a memory (240), and a processor (250). For example, each component included in the module control device (200) may be connected through a common bus, or may be connected through individual interfaces or individual buses centered around the processor (250). Meanwhile, the module control device (200) may further include various components in addition to the components illustrated in FIG. 8, or some of the components illustrated in FIG. 8 may be omitted.

[0096] The communication unit (210) may be a device for communicating with the module management device (100). The communication unit (210) may communicate with the module management device (100) according to various types of communication methods. For example, the communication unit (210) may include a communication modem that supports power line communication.

[0097] The sensor unit (220) may be a device for detecting the status of the solar module (300). The sensor unit (220) may include at least one sensor. For example, the sensor unit (220) may include at least one of a temperature sensor, a current sensor, and a voltage sensor. However, the types of sensors included in the sensor unit (220) are not limited to those described above. The sensor unit (220) may detect various pieces of information that affect the power generation performance of the solar module (300), such as the temperature, current, and voltage of the solar module (300).

[0098] The blocking unit (230) may be a device for performing an emergency shutdown. For example, the blocking unit (230) may include a circuit breaker that cuts off the power of a solar power generation system. The blocking unit (230) may include various means to satisfy the emergency shutdown requirements of a solar power generation system as stipulated in the National Electric Code (NEC) standard.

[0099] The memory (240) may store various types of information required during the operation of the processor (250). In addition, the memory (240) may store various types of information generated during the operation of the processor (250).

[0100] The processor (250) may be connected to a communication unit (210), a sensor unit (220), a blocking unit (230), and a memory (240). For example, the processor (250) may be implemented as a central processing unit (CPU), a micro controller unit (MCU), or a system on chip (SoC). In addition, the processor (250) may control a plurality of hardware or software connected to the processor (250) by running an operating system or an application. In addition, the processor (250) may perform various data processing and calculations. In addition, the processor (250) may execute at least one command stored in the memory (240) and store data generated according to the execution result in the memory (240).

[0101] For example, the processor (250) can receive a signal transmitted from the module management device (100) through the communication unit (210). In addition, the processor (250) can identify the type of signal received when a signal is received through the communication unit (210). In addition, when a monitoring request signal is received, the processor (250) can detect the status of the solar module (300) through the sensor unit (220).

[0102] For example, the processor (250) can generate a monitoring signal based on the status of the solar module (300). The processor (250) can transmit the monitoring signal to the module management device (100) through the communication unit (210).

[0103] For example, when an emergency blocking signal is received, the processor (250) can perform an emergency blocking of the solar module (300) through the blocking unit (230). In addition, when an emergency blocking release signal is received, the processor (250) can release the emergency blocking that was performed through the blocking unit (230).

[0104] The processor (250) can generate a monitoring signal when a monitoring request signal is received, regardless of whether an emergency shutdown of the solar module (300) is in progress. Even when an emergency shutdown of the solar module (300) is in progress, the processor (250) can generate a monitoring signal and transmit it to the module management device (100) when a monitoring request signal is received. In this way, monitoring of the solar module (300) can be performed even when an emergency shutdown of the solar module (300) is in progress.

[0105] For example, if a monitoring request signal transmitted from the module management device (100) is not received again within a preset time from the time the monitoring request signal is received through the communication unit (210), the processor (250) may perform an emergency shutdown of the solar module (300) through the shutdown unit (230). If the monitoring request signal is not received again within a predetermined time from the time the monitoring request signal was previously received, the processor (250) may determine that there is a problem with the module management device (100) or the communication line and may perform an emergency shutdown of the solar module (300).

[0106] FIGS. 9 to 11 are flowcharts illustrating examples of a control method of a solar module control device in one embodiment.

[0107] Fig. 9 is a first flowchart for a control method of a module control device according to one embodiment.

[0108] Referring to Fig. 9, a control method of a module control device (200) is described. However, some of the steps illustrated in Fig. 9 may be performed in a different order from the order illustrated in Fig. 9 or may be omitted.

[0109] The processor (250) can receive a signal through the communication unit (210) (S901).

[0110] The processor (250) can determine whether the signal received through the communication unit (210) is a monitoring request signal (S903). In step S903, the processor (250) can confirm whether the signal received through the communication unit (210) is a monitoring request signal.

[0111] If the signal received through the communication unit (210) is a monitoring request signal, the processor (250) can detect identification information included in the monitoring request signal (S905). In step S905, the processor (250) can analyze the monitoring request signal to confirm the identification information included in the monitoring request signal.

[0112] The processor (250) can determine whether the identification information detected in step S905 matches preset identification information (S907). Here, the preset identification information may be identification information of the module control device (200). In step S907, the processor (250) can determine whether the identification information included in the monitoring request signal matches its own identification information. In step S907, the processor (250) can determine whether the monitoring request signal received through the communication unit (210) is intended for the solar module (300) connected to it.

[0113] If the identification information detected in step S905 does not match the preset identification information, the processor (250) may terminate the process. On the other hand, if the identification information detected in step S905 matches the preset identification information, the processor (250) may detect the status of the solar module (300) through the sensor unit (220) (S909).

[0114] The processor (250) can generate a monitoring signal including information on the status of the solar module (300) (S911). In step S911, the processor (250) can generate the monitoring signal by including preset identification information (i.e., its own identification information) together with information on the status of the solar module (300).

[0115] The processor (250) can transmit a monitoring signal to the module management device (100) via the communication unit (210) (S913). In step S913, the processor (250) can transmit the result of detecting the status of the solar module (300) via the sensor unit (220) to the module management device (100).

[0116] Meanwhile, if the signal received through the communication unit (210) is not a monitoring request signal, the processor (250) can determine whether the signal received through the communication unit (210) is an emergency blocking signal (S915). In step S915, the processor (250) can confirm whether the signal received through the communication unit (210) is an emergency blocking signal.

[0117] If the signal received through the communication unit (210) is an emergency blocking signal, the processor (250) can perform an emergency blocking of the solar module (300) through the blocking unit (230) (S917). In step S917, the processor (250) can perform an emergency blocking of the solar module (300) through the blocking unit (230), thereby stopping the power generation by the solar module (300).

[0118] On the other hand, if the signal received through the communication unit (210) is not an emergency blocking signal, the processor (250) can release the emergency blocking implemented through the blocking unit (230) (S919). For example, if the signal received through the communication unit (210) is an emergency blocking release signal, the processor (250) can release the emergency blocking for the solar module (300) so that power generation can be resumed by the solar module (300).

[0119] Fig. 10 is a second flowchart for a control method of a module control device according to one embodiment.

[0120] Referring to Fig. 10, a control method of a module control device (200) is described. For example, the process of Fig. 10 may be performed in parallel with the process of Fig. 9. However, some of the steps illustrated in Fig. 10 may be performed in a different order from the order illustrated in Fig. 10 or may be omitted.

[0121] The processor (250) may count time in response to receiving a monitoring request signal (S1001). In step S1001, the processor (250) may start counting based on the time at which the monitoring request signal is received.

[0122] The processor (250) can determine whether the monitoring request signal is received again before the counted time elapses a preset time (S1003). In step S1003, the processor (250) can determine whether the monitoring request signal is received again within a preset time from the time of receiving the monitoring request signal.

[0123] If a monitoring request signal is received again before the set time elapses, the processor (250) may terminate the process. For example, if a monitoring request signal is received again before the set time elapses, the processor (250) may determine that there is no abnormality in the module management device (100) and the communication line.

[0124] On the other hand, if the monitoring request signal is not received again before the set time elapses, the processor (250) can perform an emergency shutdown of the solar module (300) via the blocking unit (230) (S1005). Accordingly, if an abnormality occurs in the module management device (100) or the communication line (e.g., an abnormal situation such as a fire occurs), damage caused by a failure in the emergency shutdown of the solar module (300) can be prevented.

[0125] Fig. 11 is a third flowchart for a control method of a module control device according to one embodiment.

[0126] Referring to Fig. 11, a method of controlling a module control device (200) will be described. For example, the process of Fig. 11 may be performed after an emergency shutdown of a solar module (300) is performed. However, some of the steps illustrated in Fig. 11 may be performed in a different order than that illustrated in Fig. 11 or may be omitted.

[0127] The processor (250) can detect the output voltage of the solar module (300) through the sensor unit (220) (S1101).

[0128] The processor (250) can determine whether the output voltage of the solar module (300) is higher than a preset reference voltage (S1103). For example, the processor (250) can use the output voltage of the solar module (300) to determine whether the emergency shutdown was performed normally.

[0129] If the output voltage of the solar module (300) is not higher than the reference voltage, the processor (250) may determine that the emergency shutdown has been performed normally and terminate the process. On the other hand, if the output voltage of the solar module (300) is higher than the reference voltage, the processor (250) may generate an emergency shutdown failure signal (S1105). For example, if the output voltage of the solar module (300) is higher than the reference voltage, the processor (250) may determine that the emergency shutdown has not been performed normally and generate an emergency shutdown failure signal.

[0130] The processor (250) can transmit an emergency blocking failure signal to the module management device (100) through the communication unit (210) (S1107).

[0131] As described above, if an emergency shutdown of a solar module (300) is not performed normally, the module control device (200) can immediately notify the administrator of the fact. Accordingly, the administrator can quickly take action in response to the situation.

[0132] Meanwhile, although it has been described that the output voltage of the solar module (300) is used to determine whether the emergency shutdown of the solar module (300) has been normally performed, it is not limited thereto. For example, the output current of the solar module (300) may be used instead of the output voltage of the solar module (300). Alternatively, the module control device (200) may consider both the output voltage and output current of the solar module (300) to determine whether the emergency shutdown of the solar module (300) has been normally performed.

[0133] FIG. 12 is a drawing showing an example of a power supply structure of a building in which solar modules are installed according to one embodiment.

[0134] Referring to Fig. 12, multiple solar modules (2) can be installed on the roof of a building to generate electricity. Multiple solar modules (2) can be connected to form a photovoltaic module array.

[0135] The inverter (6) can convert the power generated from the solar module (2) and supply the generated power into the building (1).

[0136] Meanwhile, commercial power transmitted through the power line (3) can be supplied to the building through the transformer (4).

[0137] A plurality of home appliances (7) can be operated by selectively receiving at least one of commercial electricity or power generated by a solar module (2). The power meter (5) can measure the amount of power consumed in the building (1).

[0138] Additionally, if a separate energy storage device (ESS, Energy Storage System) is installed in the building (1), the power generated from the solar module (2) can be stored in the energy storage device.

[0139] When a plurality of solar modules (2) are connected, a solar module array can be formed. The solar module array is an assembly of a plurality of solar modules and can include one output terminal.

[0140] Meanwhile, the solar module (2) may include a module unit power conversion device.

[0141] For example, the module unit power conversion device can monitor the status or power generation of the solar module (2) and transmit data to an external device. In addition, the module unit power conversion device can perform an emergency shutdown and stop the operation of the solar module (2) depending on the degree of failure of the solar module (2).

[0142] Additionally, at least one of the solar module (2) and the module unit power conversion device may include a communication module for power line communication.

[0143] 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.).

[0144] Those skilled in the art will appreciate that the present invention can be implemented in modified forms without departing from the essential characteristics of the above-described description. Therefore, the disclosed methods should be considered in an illustrative rather than a restrictive sense, and the scope of the rights is set forth in the claims rather than the foregoing description, and should be construed to include all differences within the scope equivalent thereto. The implementations described herein can be implemented as, for example, a method or process, an apparatus, 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 feature can also be implemented in other forms (e.g., an apparatus or a program). The apparatus can be implemented as suitable hardware, software, firmware, etc. The method can be implemented in a device such as a processor, which generally refers to a processing device including, for example, a computer, a microprocessor, an integrated circuit, or a programmable logic device. The processor also includes communication devices such as computers, cell phones, personal digital assistants ("PDAs"), and other devices that facilitate communication of information between end-users.

Claims

1. Communication unit that communicates with external devices; A blocking unit that performs rapid shut down on solar modules; and Including a processor connected to the communication unit and the blocking unit, A device in which the processor identifies the type of signal received through the communication unit and controls the blocking unit to perform an emergency blocking of the solar module when the type of the signal is an emergency blocking signal.

2. In paragraph 1, Further comprising a sensor unit for detecting the status of the solar module, A device in which the processor generates a monitoring signal based on the state of the solar module detected through the sensor unit when the type of the signal is a monitoring request signal, and transmits the monitoring signal through the communication unit.

3. In paragraph 2, A device wherein the processor detects identification information included in the monitoring request signal and generates the monitoring signal when the detected identification information matches preset identification information.

4. In paragraph 2, A device wherein the processor generates the monitoring signal in response to the monitoring request signal, regardless of whether an emergency shutdown is performed on the solar module.

5. In paragraph 2, The above processor is a device that controls the blocking unit to perform an emergency blocking of the solar module if the monitoring request signal is not received again within a preset time from the time the monitoring request signal is received.

6. In paragraph 1, The above solar module control device is a device including a module level power conversion device (Module Level Power Electronics).

7. In paragraph 1, The above solar module control device is a device including a DC optimizer or a micro-inverter.

8. As a device for managing a solar module control device, A first communication unit for communicating with an external device; A second communication unit communicating with a plurality of solar module control devices; and Including a processor connected to the first and second communication units, A device in which the processor generates a monitoring request signal according to a preset cycle and transmits it through the second communication unit, and when a warning signal is received through the first communication unit, stops generating and transmitting the monitoring request signal, generates an emergency blocking signal, and transmits the emergency blocking signal through the second communication unit.

9. In paragraph 8, A device, wherein the external device comprises at least one of a power control device for controlling an inverter connected to a solar module and an input device for receiving user input.

10. In paragraph 8, A device wherein the processor determines a target solar module according to a preset order and generates the monitoring request signal including identification information corresponding to the target solar module.

11. In paragraph 8, A device wherein the processor resumes generating and transmitting the monitoring request signal after the transmission of the emergency blocking signal is completed.

12. In paragraph 8, The above processor is a device that transmits the emergency blocking signal in a broadcast manner.

13. In paragraph 8, The above solar module control device is a device including a module level power conversion device (Module Level Power Electronics).

14. In paragraph 8, The above solar module control device is a device including a DC optimizer or a micro-inverter.

15. A method for controlling a solar module management device, A step of generating a monitoring request signal according to a preset cycle and transmitting it to a solar module control device; A step of stopping the generation and transmission of the monitoring request signal and generating an emergency blocking signal when a warning signal is received from an external device; and A method comprising the step of transmitting the above emergency shutdown signal to a plurality of solar module control devices.

16. In paragraph 15, A method wherein the external device comprises at least one of a power control device for controlling an inverter connected to a solar module and an input device for receiving user input.

17. In paragraph 15, The step of generating the above monitoring request signal is: A step of determining target solar modules according to a preset order; and A method comprising the step of generating the monitoring request signal including identification information corresponding to the target solar module.

18. In paragraph 15, The step of generating and transmitting the above monitoring request signal is: A method that is resumed after the transmission of the above emergency blocking signal is completed.

19. In paragraph 15, The step of transmitting the above emergency blocking signal is: A method for transmitting the above emergency blocking signal in a broadcast manner.

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