Abnormality detection device, abnormality detection method, recording medium, indoor wiring system, power regulator, circuit breaker, solar panel, solar panel accessory module, and junction box

Abstract

An abnormality detection device (10) includes a determination unit (11) that determines whether a communication connection via a communication line is lost, the communication line connecting a DC / DC converter (31) having a communication function with DC / DC converters (32 and 33) and an inverter (34); and an output unit (12) that outputs an abnormality signal in a case where it is determined that the communication connection is lost.

Description

TECHNICAL FIELD

[0001] The present application relates to an abnormality detection device, an abnormality detection method, a recording medium, an indoor wiring system, a power conditioner, a circuit breaker, a solar panel, a solar panel accessory module, and a connection box. BACKGROUND

[0002] Conventionally, a system is known in which direct-current power supplied from a PV (Photo Voltaic) panel (solar panel) or the like via a wire is converted into alternating-current power by an inverter or the like. As for a wire connecting such a direct-current power source and a device, there are reports of cases in which the wire is damaged or broken due to external factors or deterioration over time or the like. Sometimes, an abnormality such as an arc (i.e., arc discharge) or the like occurs due to damage or the like of such a wire. Therefore, a detection unit for detecting an arc or the like in a wire has been proposed (for example, Patent Literature 1).

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2011-7765 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, in the above-described Patent Literature 1, a voltage detection unit for measuring the voltage of the wire and a current detection unit for measuring the current of the wire need to be provided as the detection unit for the abnormality of the wire, and the system becomes large-sized and also high-cost.

[0008] Therefore, the present application provides an abnormality detection device or the like capable of easily detecting an abnormality of a wire.

[0009] SOLUTION TO PROBLEM

[0010] One embodiment of the abnormality detection device according to the present application includes a determination unit that determines whether or not a communication connection via a communication line is lost, the communication line connecting a voltage converter having a communication function and a device, and an output unit that outputs an abnormality signal in a case where it is determined that the communication connection is lost.

[0011] One embodiment of the abnormality detection method according to the present application includes a determination step of determining whether or not a communication connection via a communication line is lost, the communication line connecting a voltage converter having a communication function and a device, and an output step of outputting an abnormality signal in a case where it is determined that the communication connection is lost.

[0012] One embodiment of a recording medium according to the present application is a computer-readable recording medium on which a program for causing a computer to execute the above-described abnormality detection method is recorded.

[0013] One embodiment of a home wiring system according to the present application includes the above-described abnormality detection device, the communication line, and a device provided in a home and connected to the communication line.

[0014] One embodiment of a power conditioner according to the present application includes the above-described abnormality detection device, the voltage converter, and a converter that converts output power of the voltage converter.

[0015] One embodiment of a circuit breaker according to the present application includes the above-described abnormality detection device, and the circuit breaker cuts off current flowing in the communication line in a case where it is determined that the communication connection is lost.

[0016] One embodiment of a solar panel according to the present application includes the above-described abnormality detection device, and the solar panel generates power using solar energy.

[0017] One embodiment of a solar panel accessory module according to the present application includes the above-described abnormality detection device, and the solar panel accessory module converts a signal output from a solar panel.

[0018] One embodiment of a connection box according to the present application includes the above-described abnormality detection device, and the connection box connects a solar panel and a power conditioner.

[0019] Effects of Invention

[0020] According to one embodiment of the present application, an abnormality of wiring can be easily detected. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural diagram illustrating an example of a solar power generation system according to Embodiment 1.

[0022] Figure 2 is a flowchart illustrating an example of the operation of an abnormality detection device according to Embodiment 1.

[0023] Figure 3 is a structural diagram illustrating an example of a home wiring system according to Embodiment 2.

[0024] Figure 4 is a diagram for explaining an application example of an abnormality detection device according to the present application. DETAILED DESCRIPTION

[0025] Embodiments of the present application will be described below with reference to the accompanying drawings. The embodiments described below each represent a mere example of the present application. Thus, numerical values, shapes, materials, components, arrangement positions of components, connection modes of components, steps, and sequences of steps, and the like shown in the following embodiments are merely examples, and the gist of the present application is not limited to them.

[0026] Further, each drawing is a schematic view, and the illustration is not necessarily strict. Also, in each drawing, the same reference numeral is assigned to substantially the same structure, and overlapping description or simplified description is omitted.

[0027] (Embodiment 1)

[0028] Figure 1 is a configuration view showing an example of a solar power generation system 1 according to Embodiment 1.

[0029] The solar power generation system 1 is provided with a solar panel 41, storage batteries 51 and 52, DC / DC converters 31, 32, and 33, an inverter 34, and an abnormality detection device 10.

[0030] The solar panel 41 generates electric power using solar energy and generates direct-current electric power. The direct-current electric power generated by the solar panel 41 is supplied to the DC / DC converter 31.

[0031] The storage battery 51 stores direct-current electric power from the DC / DC converter 32, and the storage battery 52 stores direct-current electric power from the DC / DC converter 33. For example, the storage batteries 51 and 52 can be mounted on an electric automobile or an electric bicycle, or the like, or can be used to supply electric power to household electric appliances or the like.

[0032] The DC / DC converters 31, 32, and 33 are voltage converters that output direct-current electric power supplied after boosting or reducing the direct-current voltage of the direct-current electric power. The voltage conversion function of the DC / DC converters 31, 32, and 33 is realized by, for example, a capacitor, a coil, and a semiconductor switch, or the like.

[0033] The DC / DC converter 31 boosts or steps down the direct-current electric power supplied from the solar panel 41 and outputs the direct-current electric power to the DC / DC converters 32 and 33 and the inverter 34. The DC / DC converter 31 has a positive electrode and a negative electrode, the positive electrode is connected to a positive electrode side direct-current electric power line, and the negative electrode is connected to a negative electrode side direct-current electric power line. The positive electrode side direct-current electric power line and the negative electrode side direct-current electric power line are collectively referred to as the wiring 21. The wiring 21 branches from the DC / DC converter 31 to the DC / DC converters 32 and 33 and the inverter 34, for example. The direct-current electric power is supplied from the DC / DC converter 31 to the DC / DC converters 32 and 33 and the inverter 34 by the wiring 21. The DC / DC converter 31 has a semiconductor switch that switches on / off of the supply of electric power to the DC / DC converters 32 and 33 and the inverter 34 via the wiring 21, for example.

[0034] The DC / DC converter 31 is an example of a voltage converter having a communication function. The DC / DC converters 32 and 33 and the inverter 34 are examples of devices that communicate with the DC / DC converter 31. The DC / DC converter 31 and the DC / DC converters 32 and 33 and the inverter 34 are communicatively connected via a communication line. The wiring 21 is an example of the communication line. As described above, the wiring 21 is a direct-current electric power line, and the communication line functions as the direct-current electric power line that connects the DC / DC converter 31 and the DC / DC converters 32 and 33 and the inverter 34. The communication between the DC / DC converter 31 and the DC / DC converters 32 and 33 and the inverter 34 is performed by using PLC (Power Line Communication) or PoE (Power over Ethernet) that uses the wiring 21 that functions as both the communication line and the direct-current electric power line, for example.

[0035] The DC / DC converter 32 boosts or steps down the direct-current electric power supplied from the DC / DC converter 31 and outputs the direct-current electric power to the storage battery 51. The DC / DC converter 32 has a positive electrode and a negative electrode, the positive electrode is connected to a positive electrode side direct-current electric power line, and the negative electrode is connected to a negative electrode side direct-current electric power line. The positive electrode side direct-current electric power line and the negative electrode side direct-current electric power line are collectively referred to as the wiring 22. The direct-current electric power is supplied from the DC / DC converter 32 to the storage battery 51 by the wiring 22. The DC / DC converter 32 has a semiconductor switch that switches on / off of the supply of electric power to the storage battery 51 via the wiring 22, for example.

[0036] The DC / DC converter 32 is an example of a voltage converter having a communication function. That is, the DC / DC converter 32 is a device that communicates with the DC / DC converter 31 as a voltage converter, and is also a voltage converter. The storage battery 51 is an example of a device that communicates with the DC / DC converter 32. The communication connection of the DC / DC converter 32 with the storage battery 51 is performed via a communication line. The wiring 22 is an example of a communication line. As described above, the wiring 22 is a direct-current power line, and the communication line is used as a direct-current power line that connects the DC / DC converter 32 with the storage battery 51. The communication of the DC / DC converter 32 with the storage battery 51 is performed, for example, by using PLC or PoE of the wiring 22 that is used as both a communication line and a direct-current power line.

[0037] The DC / DC converter 33 steps up or steps down the direct-current power supplied from the DC / DC converter 31 and outputs the direct-current power to the storage battery 52. The DC / DC converter 33 has a positive electrode and a negative electrode, the positive electrode is connected with the positive electrode side direct-current power line, and the negative electrode is connected with the negative electrode side direct-current power line. The positive electrode side direct-current power line and the negative electrode side direct-current power line are collectively referred to as the wiring 23. The direct-current power is supplied from the DC / DC converter 33 to the storage battery 52 by the wiring 23. For example, the DC / DC converter 33 is provided with a semiconductor switch that switches on / off of the power supply to the storage battery 52 via the wiring 23.

[0038] The DC / DC converter 33 is an example of a voltage converter having a communication function. That is, the DC / DC converter 33 is a device that communicates with the DC / DC converter 31 as a voltage converter, and is also a voltage converter. The storage battery 52 is an example of a device that communicates with the DC / DC converter 33. The communication connection of the DC / DC converter 33 with the storage battery 52 is performed via a communication line. The wiring 23 is an example of a communication line. As described above, the wiring 23 is a direct-current power line, and the communication line is used as a direct-current power line that connects the DC / DC converter 33 with the storage battery 52. The communication of the DC / DC converter 33 with the storage battery 52 is performed, for example, by using PLC or PoE of the wiring 23 that is used as both a communication line and a direct-current power line.

[0039] The inverter 34 outputs direct-current power supplied from the DC / DC converter 31 after converting the direct-current power into alternating-current power. The inverter 34 adjusts the current and the voltage of the direct-current power supplied from the DC / DC converter 31 to values that maximize the power, for example, by using an MPPT (Maximum Power Point Tracking) method. For example, the inverter 34 converts the direct-current power into alternating-current power having a voltage of 100 V and a frequency of 50 Hz or 60 Hz. The alternating-current power is used in household electrical appliances and the like.

[0040] For example, although it is possible to detect an abnormality (e.g., damage or breakage, etc.) of the wiring by providing a current detection unit or a voltage detection unit, etc. in the wiring, when the current detection unit or the voltage detection unit, etc. is provided, the system is upsized and costed.

[0041] Therefore, in order to easily detect an abnormality of the wiring, the abnormality detection device 10 is used. The abnormality detection device 10 is implemented by, for example, a microcomputer (microcontroller). The microcomputer is a semiconductor integrated circuit or the like having a ROM in which a program is stored, a RAM, a processor (CPU: Central Processing Unit) that executes the program, a timer, an A / D converter, a D / A converter, and the like. In addition, the abnormality detection device 10 can also be implemented in a hardware manner by a dedicated electronic circuit composed of an A / D converter, a logic circuit, a gate array, a D / A converter, and the like. The abnormality detection device 10 is connected to the DC / DC converters 31, 32, and 33 and the inverter 34 in a manner capable of communicating by wireless or wired, for example, and is capable of receiving a notification from the DC / DC converters 31, 32, and 33 and the inverter 34.

[0042] The abnormality detection device 10 has a determination section 11 and an output section 12. The determination section 11 and the output section 12 are implemented by a processor executing a program stored in a memory. The operation of the determination section 11 and the output section 12 will be described using the flowchart of FIG. 6. Figure 2

[0043] Figure 2 is a flowchart showing an example of the operation of the abnormality detection device 10 according to Embodiment 1.

[0044] ​The determination section 11 determines whether or not the communication connection via the communication line connecting the voltage converter having the communication function and the device is lost (step Sll). For example, the DC / DC converter 31 and the DC / DC converter 32 periodically perform transmission and reception of a heartbeat for confirming that the communication connection of the DC / DC converter 31 and the DC / DC converter 32 is valid. Likewise, for example, the DC / DC converter 31 and the DC / DC converter 33 also perform transmission and reception of a heartbeat, the DC / DC converter 31 and the inverter 34 also perform transmission and reception of a heartbeat, the DC / DC converter 32 and the storage battery 51 also perform transmission and reception of a heartbeat, and the DC / DC converter 33 and the storage battery 52 also perform transmission and reception of a heartbeat. For example, the DC / DC converters 31, 32, and 33 and the inverter 34 notify the abnormality detection device 10 of the fact that the heartbeat can no longer be received from the communication partner on a regular basis. Thus, the determination section 11 can determine whether or not the communication connection via the communication line connecting the voltage converter having the communication function and the device is lost. For example, the abnormality detection device 10 can determine that the communication connection via the wiring 22 connecting the DC / DC converter 32 and the storage battery 51 is lost in a case where it is notified from the DC / DC converter 32 that the heartbeat can no longer be received from the storage battery 51 on a regular basis.

[0045] The determination section 11 continues the processing in step Sll in a case where it is determined that the communication connection via the communication line connecting the voltage converter and the device is not lost (NO in step Sll).

[0046] The output section 12 outputs an abnormality signal in a case where it is determined that the communication connection is lost (YES in step Sll) (step S12). For example, the abnormality signal includes a signal for cutting off the electric power supply from the voltage converter to the device. For example, in a case where it is determined that the communication connection of the DC / DC converter 32 and the storage battery 51 is lost, the output section 12 outputs a signal for cutting off the electric power supply from the DC / DC converter 32 to the storage battery 51 to the DC / DC converter 32. The DC / DC converter 32 receives the signal, and thereby cuts off the electric power supply to the storage battery 51, for example, by switching a semiconductor switch that controls the on / off of the electric power supply to the storage battery 51 via the wiring 22. In addition, the abnormality signal can also include a signal for notifying a user or a manager of the solar power generation system 1 or the like of an abnormality, and the output section 12 can notify that there is an abnormality in the wiring 22 using the signal.

[0047] Further, the abnormality detection device 10 can be provided by any one of the DC / DC converters 31, 32, and 33 and the inverter 34.

[0048] As explained above, the abnormality detection device 10 according to the present embodiment includes a determination section 11 that determines whether or not a communication connection via a communication line that connects a voltage converter having a communication function and an apparatus is lost, and an output section 12 that outputs an abnormality signal in a case where it is determined that the communication connection is lost.

[0049] Accordingly, it is possible to detect an abnormality of a wiring only by determining whether or not a communication connection is lost. In other words, it is also possible to easily detect an abnormality of a wiring without providing a voltage detection unit or a current detection unit or the like in the wiring.

[0050] For example, the communication line can also be used as a direct-current power line that connects the voltage converter and the apparatus.

[0051] A direct-current power line used in power supply involves safety, and thus it is important to detect an abnormality of the direct-current power line. This is because an abnormality of the direct-current power line involves a risk of an electrical fire caused by, for example, electric leakage, short circuit, or arc discharge. According to the present mode, it is possible to easily detect an abnormality of such a direct-current power line by determining whether or not a communication connection is lost.

[0052] For example, the abnormality signal can also include a signal for cutting off power supply from the voltage converter to the apparatus.

[0053] Accordingly, in a case where an abnormality of a wiring is detected, it is possible to cut off power supply from the voltage converter to the apparatus, and thus it is possible to ensure safety.

[0054] (Embodiment 2)

[0055] In Embodiment 1, an example in which the abnormality detection device is provided in a solar power generation system is explained, but it is also possible to provide the abnormality detection device in an indoor wiring system. This will be explained using Figure 3

[0056] Figure 3 is a configuration diagram showing an example of an indoor wiring system 2 according to Embodiment 2. Further, Figure 3 is also shown in FIG. 12.

[0057] The system power supply 40 is a power supply that supplies alternating-current power generated by a power plant or the like.

[0058] The indoor wiring system 2 includes an AC / DC converter 30, a wiring 20, lighting fixtures 53, 54, and 55, and an abnormality detection device 10. The AC / DC converter 30, the wiring 20, the lighting fixtures 53, 54, and 55, and the abnormality detection device 10 are provided in an indoor space of a facility such as an independent house, a collective house, a building, or a factory.

[0059] ​The AC / DC converter 30 is a voltage converter that is supplied with alternating-current power from the system power supply 40 and outputs the supplied alternating-current power after converting it to direct-current power. The AC / DC converter 30 outputs the converted direct-current power to the lighting fixtures 53, 54, and 55. The AC / DC converter 30 has a positive electrode that is connected to the positive-side direct-current power line and a negative electrode that is connected to the negative-side direct-current power line. The positive-side direct-current power line and the negative-side direct-current power line are collectively referred to as the wiring 20. The wiring 20 branches, for example, from the AC / DC converter 30 to the lighting fixtures 53, 54, and 55. Direct-current power is supplied from the AC / DC converter 30 to the lighting fixtures 53, 54, and 55 using the wiring 20. The AC / DC converter 30, for example, has a semiconductor switch that switches on and off the supply of power to the lighting fixtures 53, 54, and 55 via the wiring 20.

[0060] The AC / DC converter 30 is an example of a voltage converter having a communication function. The lighting fixtures 53, 54, and 55 are examples of devices that communicate with the AC / DC converter 30. The communication connection of the AC / DC converter 30 with the lighting fixtures 53, 54, and 55 is performed via a communication line. The wiring 20 is an example of a communication line. As described above, the wiring 20 is a direct-current power line, and the communication line functions as a direct-current power line that connects the AC / DC converter 30 with the lighting fixtures 53, 54, and 55. The communication of the AC / DC converter 30 with the lighting fixtures 53, 54, and 55 is performed, for example, by using PLC or PoE that uses the wiring 20 that functions as both a communication line and a direct-current power line.

[0061] Furthermore, the devices are not limited to lighting fixtures, but can be any devices installed in a room, and are not particularly limited. For example, the devices can be speakers or microphones, or the like.

[0062] For example, although it is possible to detect abnormalities (such as damage or breakage, or the like) of the wiring by providing a current detection unit or a voltage detection unit, or the like in the wiring 20, the system becomes large and expensive when a current detection unit or a voltage detection unit, or the like is provided.

[0063] Therefore, in order to easily detect abnormalities of the wiring, the abnormality detection device 10 is also used in this embodiment. The abnormality detection device 10 is the same as the abnormality detection device in Embodiment 1, and is different from Embodiment 1 in that the application destination is the room wiring system 2.

[0064] For example, the AC / DC converter 30 and the lighting fixture 53 periodically perform transmission and reception of a heartbeat signal for confirming that the communication connection of the AC / DC converter 30 and the lighting fixture 53 is valid. Likewise, for example, the AC / DC converter 30 and the lighting fixture 54 also perform transmission and reception of a heartbeat signal, and the AC / DC converter 30 and the lighting fixture 55 also perform transmission and reception of a heartbeat signal. For example, the AC / DC converter 30 notifies the abnormality detection device 10 of the fact that it is no longer able to periodically receive a heartbeat signal from the lighting fixture 53, 54, or 55.

[0065] The operation of the determination section 11 and the output section 12 is the same as that described in Embodiment 1, and thus the description is omitted.

[0066] As described above, the indoor wiring system 2 according to the present embodiment is provided with the abnormality detection device 10, a communication line (for example, the wiring 20), and devices (for example, the lighting fixtures 53, 54, and 55) provided in the indoor.

[0067] In this way, the abnormality detection device 10 can also be applied to the indoor wiring system 2, and an indoor wiring system 2 that can easily detect an abnormality of a wiring can be provided.

[0068] (Other Embodiments)

[0069] The above describes the abnormality detection device and the like according to the present embodiment, but the present application is not limited to the above-described embodiments.

[0070] For example, in the above-described embodiments, an example in which the communication line also functions as a direct-current power line that connects the voltage converter and the device is described, but the communication line can not also function as a direct-current power line.

[0071] For example, in the above-described embodiments, an example in which a current detection unit or a voltage detection unit is not provided in the wiring is described, but a current detection unit or a voltage detection unit can be provided in the wiring. Also, the determination section 11 can analyze the frequency component of the electrical parameter (for example, the current or the voltage) acquired from the current detection unit or the voltage detection unit after determining that the communication connection is lost, and determine the type of abnormality or the like.

[0072] For example, in the above-described embodiments, an example in which the abnormality detection device is applied to a solar power generation system and an indoor wiring system is described, but the application example is not limited to this. Using Figure 4 Other application examples of the abnormality detection device according to the present application (that is, an abnormality detection device that can easily detect an abnormality of a wiring) will be described.

[0073] Figure 4 is a diagram for describing an application example of the abnormality detection device according to the present application.

[0074] The abnormality detection device according to the present application is applied, for example, to a system that converts direct current power supplied from solar panels 310 via wiring into alternating current power using a power conditioner 500. In this application example, a plurality of (for example, three) solar panel groups in which a plurality of (for example, three) solar panels 310 are connected in series by one wiring 600 (string) are arranged, thereby forming a solar cell array 300. The plurality of wirings 600 are collected by a connection box 400 and connected to the power conditioner 500. The wiring 600 is a communication line.

[0075] For example, a circuit breaker 410 is provided for each wiring 600. In this case, the circuit breaker 410 is provided in the connection box 400. Alternatively, the circuit breaker 410 can not be provided in the connection box 400. For example, the circuit breaker 410 can be provided between the connection box 400 and the solar cell array 300, or can not be provided for each wiring 600 but can be provided between the connection box 400 and the power conditioner 500.

[0076] The solar panel 310 has, for example, a solar panel auxiliary module 320 that converts a signal output from the solar panel 310. The solar panel auxiliary module 320 is, for example, a DC / DC converter that optimizes the power generation amount of each solar panel 310. Alternatively, the solar panel 310 can not have the solar panel auxiliary module 320.

[0077] The power conditioner 500 has a voltage converter (for example, a DC / DC converter) and a converter (for example, an inverter) that converts the output power (direct current power) of the voltage converter into alternating current power.

[0078] For example, the power conditioner 500 can have the abnormality detection device. In a case where it is determined that an arc occurs, the power conditioner 500 is stopped.

[0079] For example, the circuit breaker 410 can have the abnormality detection device. In a case where it is determined that an abnormality occurs, the circuit breaker 410 cuts off the current flowing in the wiring 600.

[0080] Alternatively, for example, the solar panel 310 or the solar panel auxiliary module 320 can have the abnormality detection device. In a case where it is determined that an abnormality occurs, the solar panel 310 or the solar panel auxiliary module 320 stops output to the wiring 600.

[0081] Alternatively, for example, the connection box 400 can have the abnormality detection device. In a case where it is determined that an abnormality occurs, the connection box 400 cuts off the current flowing in the wiring 600, for example, by the circuit breaker 410 or the like.

[0082] Further, the abnormality detection device according to the present application is not limited to these, but can be applied to all systems in which it is necessary to detect an abnormality of a wiring.

[0083] Thus, the power conditioner 500 can also have the abnormality detection device, the voltage converter, and the converter that converts the output power of the voltage converter. The circuit breaker 410 can also have the abnormality detection device that cuts off the current flowing in the communication line in the case where it is determined that the communication connection is lost. Further, the solar panel 310 that generates power using solar energy can also have the abnormality detection device. Further, the solar panel accessory module 320 that converts the signal output from the solar panel 310 can also have the abnormality detection device. Further, the connection box 400 that connects the solar panel 310 and the power conditioner 500 can also have the abnormality detection device.

[0084] Further, the present application can be realized not only as the abnormality detection device but also as an abnormality detection method including steps (processes) performed by each component that constitutes the abnormality detection device.

[0085] Specifically, as shown in Figure 2 the abnormality detection method includes a determination step (step S11) of determining whether or not a communication connection via a communication line that connects a voltage converter having a communication function and an apparatus is lost, and an output step (step S12) of outputting an abnormality signal in the case where it is determined that the communication connection is lost (YES in step S11).

[0086] For example, these steps can also be executed by a computer (computer system). Further, the present application can be realized as a program for causing a computer to execute the steps included in these methods. Further, the present application can be realized as a non-transitory computer-readable recording medium such as a CD-ROM or the like on which the program is recorded.

[0087] For example, the abnormality detection device can also be realized in software in a general-purpose computer such as a personal computer.

[0088] Further, modes obtained by applying various modifications that a person skilled in the art can think of to each embodiment, and modes realized by arbitrarily combining the components and functions in each embodiment within a range that does not depart from the gist of the present application are also included in the present application.

[0089] Explanation of Reference Numerals

[0090] 1: solar power generation system; 2: indoor wiring system; 10: abnormality detecting device; 11: determination section; 12: output section; 20, 21, 22, 23, 600: wiring; 30: AC / DC converter; 31, 32, 33: DC / DC converter; 34: inverter; 40: system power supply; 41, 310: solar panel; 51, 52: storage battery; 53, 54, 55: lighting fixture; 300: solar cell array; 320: solar panel attachment module; 400: connection box; 410: circuit breaker; 500: power conditioner.

Claims

1. An abnormality detection device, comprising: a communication line connecting a voltage converter having a communication function and an apparatus; and a determination section determining that the communication connection is lost, wherein the voltage converter and the apparatus periodically perform transmission and reception of a heartbeat signal for confirming that the communication connection between the voltage converter and the apparatus is valid, the voltage converter notifies the determination section that the heartbeat signal is no longer able to be periodically received from the apparatus, and the determination section determines that the communication connection is lost upon receiving the notification. a determination section that determines whether a communication connection via a communication line is lost, wherein 2. The abnormality detection device according to claim 1, wherein the communication line is used as a direct current power line connecting the voltage converter and the apparatus.

3. The abnormality detection device according to claim 1 or 2, wherein the abnormality signal includes a signal for cutting off power supply from the voltage converter to the apparatus.

4. An abnormality detection method, comprising: a determination step of determining whether a communication connection via a communication line is lost, wherein the communication line connects a voltage converter having a communication function and an apparatus; and an output step of outputting an abnormality signal upon determining that the communication connection is lost, wherein the voltage converter and the apparatus periodically perform transmission and reception of a heartbeat signal for confirming that the communication connection between the voltage converter and the apparatus is valid, the voltage converter notifies that the heartbeat signal is no longer able to be periodically received from the apparatus, and the determination that the communication connection is lost is made upon receiving the notification.

5. A computer-readable recording medium recording a program for causing a computer to execute the abnormality detection method according to claim 4.

6. An indoor wiring system, comprising: the abnormality detection device according to any one of claims 1 to 3; the communication line; and an apparatus provided in an indoor space and connected to the communication line.

7. A power conditioner, comprising: the abnormality detection device according to any one of claims 1 to 3; the voltage converter; and a converter that converts output power of the voltage converter.

8. A circuit breaker, comprising the abnormality detection device according to any one of claims 1 to 3, and cutting off current flowing in the communication line upon determining that the communication connection is lost.

9. A solar panel, comprising the abnormality detection device according to any one of claims 1 to 3, and generating power using solar energy.

10. A solar panel accessory module, comprising the abnormality detection device according to any one of claims 1 to 3, and converting a signal output from a solar panel.

11. A connection box, comprising the abnormality detection device according to any one of claims 1 to 3, and connecting a solar panel and a power conditioner. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ wherein ​ ​ ​ wherein, ​ ​ ​ wherein ​ ​ ​ wherein, ​

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