Method for shutting down power device, program, storage medium, and power device

Abstract

To surely prevent data from being erased when an electric operation portion is cut off from the outside of a power device.SOLUTION: In a termination method of a power device 10, when it is acquired that a water level has reached a predetermined height position from an installation surface 42, preparation processing is executed in each housing 22. When it is acquired that the preparation processing is completed, or when it is acquired that predetermined time has elapsed after it is acquired that the water level has reached the predetermined height position, a termination command is generated. Based on the termination command, termination processing is executed in each housing 22.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a method for terminating an electric power device, a program, a storage medium, and an electric power device. [Background technology]

[0002] Patent Document 1 discloses a battery pack (electricity storage device). The battery pack includes a case, a battery body, and a detection unit. The battery body is housed inside the case. The detection unit is located at the bottom of the case. The detection unit detects liquid that has entered the case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-50032 Summary of the Invention [Problem to be solved by the invention]

[0004] An electric power device such as a battery exchange machine includes a housing. The housing detachably houses multiple power storage devices. An electric operation unit, a control unit, and a volatile memory unit are arranged inside the housing. The electric operation unit electrically connects the multiple power storage devices to the outside of the housing. The electric operation unit inputs and outputs electric power between the multiple power storage devices and the outside of the housing. The control unit controls the electric operation unit and the multiple power storage devices. The volatile memory unit temporarily stores data related to the electric power device.

[0005] When an electric power device is installed outdoors, there is a possibility that the housing may become flooded due to precipitation, river flooding, the conditions of the installation location, and the like. If the housing becomes flooded, it is necessary to cut off the electrical connection between the electrical operating unit and the outside of the housing using a disconnecting unit such as a circuit breaker to avoid electric shock and short circuits. However, if the electrical connection is immediately cut off when the housing becomes flooded, data handled by the control unit, data temporarily stored in the volatile memory unit, and the like will be erased. If the data is erased, when the electric power device is restarted, problems may occur in the operation of the electric power device and problems may occur in the acquisition of data related to the electric power device.

[0006] An object of the present invention is to solve the above-mentioned problems. [Means for solving the problem]

[0007] A first aspect of the present invention is a method for shutting down an electric power device, comprising: an acquisition step of acquiring that the water level has reached a predetermined height position above the installation surface of the electric power device; a first processing step of executing a preparatory process for shutting down the electric power device when it is acquired in the acquisition step that the water level has reached the predetermined height position; a generation step of generating a termination command for shutting down the electric power device when it is acquired in the first processing step that the preparatory process has been completed or when it is acquired in the acquisition step that a predetermined time has elapsed since it was acquired that the water level has reached the predetermined height position; and a second processing step of executing a termination process for shutting down the electric power device when the termination command is received.

[0008] A second aspect of the present invention is a program for causing a computer to execute the termination method.

[0009] A third aspect of the present invention is a storage medium for storing the program.

[0010] A fourth aspect of the present invention is an electric power device installed on an installation surface, the electric power device comprising: a water level acquisition unit that acquires information that the water level has reached a predetermined height position from the installation surface; a first processing unit that executes preparatory processing to terminate the electric power device when the water level acquisition unit acquires information that the water level has reached the predetermined height position; a termination command generation unit that generates a termination command to terminate the electric power device when it acquires information that the preparatory processing has been completed or when a predetermined time has elapsed since it acquired information that the water level has reached the predetermined height position; and a second processing unit that executes termination processing to terminate the electric power device based on the termination command. [Effects of the Invention]

[0011] According to the present invention, after it is determined that the water level has reached a predetermined height, a preparatory process for shutting down the power device is executed. When it is determined that the preparatory process is complete, or when a predetermined time has elapsed since the water level reached the predetermined height, a termination command for shutting down the power device is generated. Based on the generated termination command, the termination process for shutting down the power device is executed. As described above, according to the present invention, even if an emergency shutdown is required due to flooding, the termination process is executed after the preparatory process is completed. This makes it possible to shut down the power device after reliably storing data that needs to be secured. As a result, it is possible to reliably prevent data from being erased when the electrical operating unit is disconnected from the outside of the power device. Furthermore, by storing data before the termination process is executed, it is possible to prevent operational problems when the power device is restarted, problems with acquiring data related to the power device, and the like. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a front view of the power device according to this embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the housing of FIG. [Figure 3] FIG. 3 is a circuit configuration diagram of the central power device (central housing) of FIG. [Figure 4]FIG. 4 is a circuit configuration diagram of the linked power device (linked housing) of FIG. [Figure 5] 5A and 5B are circuit diagrams of the water immersion detection unit. [Figure 6] FIG. 6 is a flow chart illustrating a method for terminating operation of a power device. [Figure 7] FIG. 7 is a flow chart illustrating a method for terminating operation of a power device. DETAILED DESCRIPTION OF THE INVENTION

[0013] FIG. 1 is a front view of a power device 10 according to this embodiment.

[0014] The power device 10 is installed outdoors, for example. The power device 10 includes a plurality of charging / discharging devices 12. The plurality of charging / discharging devices 12 are installed outdoors in a line. The plurality of charging / discharging devices 12 can transmit and receive signals or information via a single communication line 14. That is, the plurality of charging / discharging devices 12 are communicatively connected via the single communication line 14. The plurality of charging / discharging devices 12 are arranged in a line on a communication path 16 via the communication line 14. The plurality of charging / discharging devices 12 transmit and receive signals or information using a daisy chain method. Of the plurality of charging / discharging devices 12, a central charging / discharging device 12 is a charging / discharging device that controls all of the charging / discharging devices 12 in an integrated manner. The other plurality of charging / discharging devices 12 arranged between the central charging / discharging device 12 and the end of the communication path 16 are charging / discharging devices controlled by the central charging / discharging device 12.

[0015] In the following description, the central charging / discharging device 12 may be referred to as a control power device 18. Furthermore, among the multiple charging / discharging devices 12, other charging / discharging devices 12 than the control power device 18 (charging / discharging devices 12 closer to the end of the communication path 16 than the control power device 18) may be referred to as linked power devices 20.

[0016] Each of the multiple charging / discharging devices 12 has a housing 22 of the same shape. In the power device 10, the multiple housings 22 are installed in a row at the installation location of the power device 10. The housings 22 are rectangular. In the following description, the housing 22 of the centralized power device 18 may be referred to as a central housing 24. Furthermore, the housings 22 of the multiple linked power devices 20 may be referred to as a linked housing 26.

[0017] Each of the multiple housings 22 has multiple slots 28. Each of the multiple slots 28 opens to a front face 30 of the housing 22. Batteries 32 (power storage units, power storage devices) can be attached and detached to the multiple slots 28. A user can attach and detach batteries 32 to and from the multiple slots 28.

[0018] It is sufficient that at least one battery 32 is attached to each of the multiple housings 22. When the housing 22 is capable of accommodating multiple batteries 32, it is sufficient that at least one of the multiple batteries 32 is detachable from the housing 22. It is more preferable that the battery 32 is detachable from the housing 22 without using a separate work tool or the like. In other words, the battery 32 is configured to be detachable from the housing 22 without using a work tool or the like. Furthermore, "attaching to and detaching from the housing 22 (power device 10)" includes the case where the battery 32 is attached to the housing 22 and the case where the battery 32 is detached from the housing 22. In the following explanation, a case where multiple batteries 32 are detachable from the housing 22 will be explained.

[0019] Therefore, the battery 32 is a mobile battery that can be attached to and detached from the multiple housings 22. The shape of the battery 32 is a substantially rectangular parallelepiped. The battery 32 is a mobile battery that can be charged and discharged. The battery 32 is preferably, for example, a battery pack of a detachable lithium-ion battery.

[0020] An operation panel 34 is provided on the front surface 30 of the main housing 24 above the multiple slots 28. That is, the operation panel 34 is provided only on the main housing 24. The multiple connecting housings 26 are not provided with an operation panel 34. The operation panel 34 is, for example, a touch panel. The operation panel 34 can display various information such as the remaining capacity of the battery 32. The user can operate the operation panel 34 to input various instructions.

[0021] Each of the multiple housings 22 has four slots 28 in the vertical direction. Furthermore, each of the multiple housings 22 has three slots 28 in the horizontal direction. Therefore, a total of 12 slots 28 are provided in one housing 22. Note that in this embodiment, batteries 32 do not necessarily have to be installed in all 12 slots 28 in one housing 22. FIG. 1 illustrates a case in which batteries 32 are installed in 10 of the 12 slots 28 in each of the multiple housings 22.

[0022] 2 is a cross-sectional view of the housing 22. In FIG. 2, a configuration common to all of the housings 22 that constitute the power device 10 is illustrated.

[0023] The interior of the housing 22 is divided into two chambers by a horizontally extending partition plate 36. Within the interior of the housing 22, the chamber above the partition plate 36 is a first chamber 38. The chamber below the partition plate 36 is a second chamber 40. Furthermore, (each of the housings 22 constituting) the power device 10 is installed on an installation surface 42. In the housing 22, a bottom plate 44 is disposed at a predetermined height position above the installation surface 42. That is, the bottom plate 44 is located a predetermined height above the ground surface (bottom surface) of the housing 22 that contacts the installation surface 42. The second chamber 40 is an internal space within the housing 22 between the partition plate 36 and the bottom plate 44. An opening / closing door 46 is provided at the rear of the housing 22. When a user opens the opening / closing door 46, the first chamber 38 and the second chamber 40 are exposed to the outside.

[0024] In the first chamber 38, a tripping unit 48 (connection / disconnection part), an inverter 50 (electrical operation part), a DC / DC converter 52 (electrical operation part), and a control box 54 are arranged.

[0025] A plurality of slots 28 are arranged in the second chamber 40. Each of the plurality of slots 28 extends obliquely downward from the front face 30 of the housing 22 toward the rear. A fan 56, a DC / DC converter 58 (electrical operating unit), and a slot-side board 60 are arranged at the rear of each of the plurality of slots 28. The fan 56 generates an airflow inside the slot 28, thereby promoting the flow of air inside and outside the slot 28.

[0026] A frame 62 is disposed between the partition plate 36 and the bottom plate 44. The frame 62 extends in the vertical direction. The frame 62 fixes the plurality of slots 28 inside the second chamber 40.

[0027] Water ingress detection sensors 64 are disposed on the front side (front face 30 side) and rear side of the upper surface of the bottom plate 44. The two water ingress detection sensors 64 are disposed at a predetermined height from the installation surface 42. A communication hole (not shown) is formed in the bottom plate 44. The communication hole connects the second chamber 40 to the outside of the housing 22. When rainfall, river flooding, etc. occurs, the water level rises from the installation surface 42. When the water level rises above the height position of the bottom plate 44, water enters the second chamber 40 through the communication hole. When water enters the second chamber 40, the housing 22 becomes flooded (submerged).

[0028] When the housing 22 is flooded (submerged) up to a predetermined height (the installation position of the flood detection sensor 64) due to precipitation, river flooding, installation site conditions, etc., each of the two flood detection sensors 64 detects that the water level has reached a predetermined height. The predetermined height is set to a position within the housing 22 below a portion associated with electrically operated components. In FIG. 2, the predetermined height is set to a position lower than the bottom end of the lowest slot 28. The predetermined height is set to, for example, 200 mm. That is, the two flood detection sensors 64 are installed at a height of 200 mm from the installation surface 42. The predetermined height may be changed as appropriate depending on the installation site conditions of the power device 10, etc.

[0029] 3 is a circuit diagram of the integrated power device 18. The integrated power device 18 includes a tripping unit 48, an inverter 50, a DC / DC converter 52, a control box 54, an operation panel 34, a speaker 66, two water immersion sensors 64, and a plurality of slots 28. As described above, each of the plurality of slots 28 is provided with a fan 56, a DC / DC converter 58, and a slot-side board 60. The control box 54 includes a housing control board 68 (internal control unit), an integrated control board 70 (integrated control unit), and two communication units 72 and 74. The housing control board 68 includes a RAM 76 (volatile memory unit) and a timer 78 (timekeeping unit). The integrated control board 70 includes a ROM 80 (non-volatile memory unit).

[0030] The tripping unit 48 is electrically connected to the outside of the main housing 24. The inverter 50 is electrically connected to the tripping unit 48. The multiple DC / DC converters 52, 58 are electrically connected in parallel to the inverter 50. The section from the outside of the main housing 24 to the multiple DC / DC converters 52, 58 is a relatively high-voltage circuit portion (high-voltage circuit 82). Note that in FIG. 3, the wiring of the high-voltage circuit 82 is shown by thick lines.

[0031] The tripping unit 48 is a high-voltage circuit breaker. When an excessive voltage exceeding a predetermined threshold occurs in the high-voltage circuit 82, the tripping unit 48 cuts off the electrical connection between the outside of the main housing 24 and the inverter 50. This provides appropriate protection for the main housing 24.

[0032] AC power flows through the portion of high-voltage circuit 82 from tripping unit 48 to inverter 50. That is, when power (external power) is supplied from outside main housing 24, relatively high-voltage AC power is supplied to inverter 50 via tripping unit 48. Inverter 50 converts the AC power into relatively high-voltage DC power. The converted DC power is supplied to multiple DC / DC converters 52, 58. Multiple DC / DC converters 52, 58 convert the relatively high-voltage DC voltage into a low-voltage DC voltage.

[0033] The battery 32 has a connector 84. The slot 28 has a connector 86 that can be fitted into the connector 84 of the battery 32. When the battery 32 is attached to the slot 28, the connector 84 of the battery 32 and the connector 86 of the slot 28 are connected. When a battery 32 is attached to each of the multiple slots 28, each of the multiple DC / DC converters 58 can output a converted low-voltage direct current voltage to the battery 32. As a result, the battery 32 receives a supply of external power and stores (charges) it.

[0034] When power is output from the housing 22 to the outside, the DC / DC converters 58 provided in each of the plurality of slots 28 convert the DC voltage (battery voltage) of the battery 32 into a relatively high DC voltage. The inverter 50 converts the DC power supplied from the plurality of DC / DC converters 58 into AC power. The converted AC power is output to the outside via the tripping unit 48.

[0035] The DC / DC converter 52 converts a relatively high DC voltage into a low DC voltage. The DC / DC converter 52 supplies the converted low DC voltage to the multiple slot-side boards 60 and the control box 54. Each of the multiple slot-side boards 60 is driven by the voltage supplied from the DC / DC converter 52.

[0036] The section from the multiple DC / DC converters 58 to the battery 32 and the section from the DC / DC converter 52 to the control box 54, the multiple slot-side boards 60, and the multiple fans 56 constitute a low-voltage circuit 88. The low-voltage circuit 88 is a relatively low-voltage circuit portion inside the housing 22. Note that in FIG. 3, the wiring of the low-voltage circuit 88 is shown with thin lines.

[0037] In the following description, the case where the central power device 18 and the linked power devices 20 are chargers that charge power to the battery 32. In this embodiment, the central power device 18 and the linked power devices 20 can function as power feeders that output power from the battery 32 to the outside.

[0038] In the control box 54 , the housing control board 68 and the general control board 70 are driven by a DC voltage supplied from the DC / DC converter 52 .

[0039] The housing control board 68 and the overall control board 70 are each an ECU (electronic control unit) mounted on the overall housing 24. The housing control board 68 and the overall control board 70 are each a computer that may include a processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). In other words, the housing control board 68 and the overall control board 70 may each be configured with processing circuitry. The housing control board 68 realizes various functions by reading and executing programs stored in the RAM 76. The overall control board 70 realizes various functions by reading and executing programs stored in the ROM 80.

[0040] At least a portion of each of the housing control board 68 and the overall control board 70 may be realized by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array). Also, at least a portion of each of the housing control board 68 and the overall control board 70 may be configured by an electronic circuit including discrete devices.

[0041] The RAM 76 is a volatile memory that is used as a working memory for the chassis control board 68, which is a processor, and temporarily stores data necessary for processing or calculation.

[0042] The RAM 76 temporarily stores data related to the central power device 18 (central housing 24). The RAM 76 stores, for example, information on the loan or lending of the battery 32, a status flag indicating how much of the work being performed in the central housing 24 has been completed, and a flag indicating that a malfunction has been detected in the housing 22. The RAM 76 also stores information on the battery 32. The information on the battery 32 includes the battery voltage, the temperature of the battery 32, the SOC, charge / discharge information indicating whether the battery 32 is in a discharged state or a charged state, and the like. The discharged state is a state in which the battery 32 is outputting DC power (a state during discharging). The charged state is a state in which DC power is supplied to the battery 32 (a state during charging).

[0043] The ROM 80 is a non-volatile memory. The ROM 80 may be replaced with a flash memory, which is a non-volatile memory. The ROM 80 is used as a storage memory, and stores programs, tables, maps, and the like.

[0044] The housing control board 68 controls each unit arranged inside the main housing 24. Specifically, the housing control board 68 transmits and receives signals to the multiple slot-side boards 60. The housing control board 68 supplies control signals to the inverter 50, the DC / DC converter 52, and the multiple slot-side boards 60. The housing control board 68 also acquires the detection results of the two water immersion detection sensors 64. The housing control board 68 can transmit and receive signals or information to and from the connecting housing 26 (see FIG. 1) via the communication unit 72. The housing control board 68 can output sound to the outside of the main housing 24 via the speaker 66.

[0045] The housing control board 68 has a timer 78 (time measuring unit). The timer 78 measures time from an arbitrary time.

[0046] Each of the multiple slot-side boards 60 controls the DC / DC converter 58 and the fan 56 based on a control signal from the housing control board 68. When the fan 56 is driven, an airflow is generated inside the slot 28, making it possible to adjust the temperature of the battery 32 attached to the slot 28 to a desired temperature.

[0047] Furthermore, each of the multiple slot-side boards 60 acquires information about the battery 32 from the battery 32. The slot-side board 60 outputs the acquired information about the battery 32 to the housing control board 68. The housing control board 68 can temporarily store the input information about the battery 32 in the RAM 76.

[0048] The overall control board 70 transmits various commands to the multiple connected housings 26 via the housing control board 68 and the communication unit 72. The overall control board 70 also receives the results of user operations on the operation panel 34. Furthermore, the overall control board 70 can transmit and receive signals or information to and from the outside of the power device 10 (for example, an external remote device such as a server) via the communication unit 74. Therefore, the overall control board 70 can sequentially obtain the status of each housing 22 (for example, whether or not the housing 22 is flooded) from the housing control board 68 of each housing 22.

[0049] FIG. 4 is a circuit diagram of the linked power device 20. In the linked power device 20, the same components as those in the management power device 18 (see FIG. 3) are assigned the same reference numerals, and detailed description thereof will be omitted. The linked power device 20 differs from the management power device 18 in that it does not include a management control board 70, an operation panel 34, and a communication unit 74. Therefore, in the linked power device 20, a RAM 76 for temporarily storing data related to the linking housing 26 is provided inside the linking housing 26, but a ROM 80 is not provided. Furthermore, in the description of the management housing 24 above in FIG. 3, by replacing "management housing 24" with "linking housing 26," the respective components arranged inside the linking housing 26 can be described.

[0050] 5A and 5B are circuit diagrams of a water ingress detection unit 90 that detects water ingress into the housing 22. The water ingress detection unit 90 is provided inside the housing 22. The water ingress detection unit 90 has a water ingress detection sensor 64, two resistors 92 and 94, and a capacitor 96. The two resistors 92 and 94 and the capacitor 96 are provided on the housing control board 68. The two resistors 92 and 94 and the capacitor 96 form a series circuit. A DC voltage is supplied to the series circuit of the two resistors 92 and 94 and the capacitor 96. The water ingress detection sensor 64 has a float and a shaft (not shown), and a microswitch 98. The microswitch 98 is electrically connected in parallel to the series circuit of the resistor 94 and the capacitor 96.

[0051] The water submersion sensor 64 has a cylindrical float inserted into a shaft that extends vertically. When the water level is below the float, the float is located at the bottom end of the shaft. In this case, as shown in FIG. 5A , the microswitch 98 is in the on state, shorting out the series circuit of the resistor 94 and capacitor 96. As a result, the output voltage Vs of the series circuit of the resistor 94 and capacitor 96 becomes 0 V. In other words, by turning on the microswitch 98 and setting the output voltage Vs of the series circuit of the resistor 94 and capacitor 96 to 0 V, the water submersion sensor 64 outputs a detection result to the housing control board 68 indicating that the water level has not reached a predetermined height.

[0052] Furthermore, as the water level rises, the float displaces upward along the shaft. When the float reaches a predetermined height, as shown in FIG. 5B, the microswitch 98 turns off, and the output voltage Vs of the series circuit of the resistor 94 and the capacitor 96 becomes a predetermined voltage value (e.g., Vs = V > 0). That is, the water submersion detection sensor 64 turns off the microswitch 98 and sets the output voltage Vs to a predetermined voltage value, thereby outputting a detection result that the water level has reached a predetermined height to the housing control board 68. Based on the detection result that the water level has reached a predetermined height, the housing control board 68 can determine that the housing 22 has been submerged.

[0053] As shown in FIG. 1, the power device 10 is installed at a given installation location. The given installation location may be, for example, outdoors. In the power device 10, a plurality of housings 22 are installed in a row. Two flood detection sensors 64 (see FIG. 2) are provided in each of the plurality of housings 22. If at least one of the plurality of housings 22 constituting the power device 10 is flooded due to precipitation, river flooding, installation site conditions, etc., the other housings 22 may also be flooded or may become flooded. Flooding of a housing 22 may result in electric shock, short circuit, etc. Therefore, if at least one of the plurality of housings 22 is flooded, it is necessary to cut off the electrical connection between the outside of the housing 22 and the inverter 50 using a tripping unit 48 (see FIGS. 3 and 4) to avoid electric shock, short circuit, etc. In other words, it is necessary to stop the operation of all housings 22.

[0054] In this embodiment, "termination" refers to stopping the power supply 10 (housing 22) so that the power supply 10 (housing 22) cannot perform any electrical operation. In other words, "termination" refers to terminating the supply of electricity to the power supply 10 (housing 22). Specifically, "termination" includes cutting off the connection to the power source (turning off the power) by cutting off the electrical connection as described above, or electrically terminating the operation.

[0055] In the multiple housings 22, the RAM 76 temporarily stores data handled by the housing control board 68, etc. Therefore, when the flood detection unit 90 (see FIGS. 5A and 5B ) detects flooding of the housing 22, it immediately cuts off the electrical connection between the outside of the housing 22 and the inverter 50, and terminates the operation of the housing 22, erasing the data handled by the housing control board 68, the data temporarily stored in the RAM 76, etc. As a result of the data being erased, when the power device 10 is restarted, malfunctions may occur in the operation of the power device 10 and malfunctions may occur in the acquisition of data related to the power device 10. For example, when the battery 32 is loaned to a user, the user may be erroneously charged. Furthermore, when the power device 10 is restarted, the power device 10 may behave in an unspecified manner.

[0056] To avoid such data deletion, in this embodiment, after detecting flooding, preparatory processing for terminating the operation of the power device 10 is executed before executing termination processing for terminating the operation of the power device 10. Therefore, even if an emergency shutdown is required due to flooding, the termination processing is executed after the preparatory processing is completed.

[0057] Specifically, when the water ingress detection unit 90 detects water ingress in at least one of the multiple housings 22, the housing control board 68 of that housing 22 notifies the overall control board 70 that the housing 22 has been flooded. In this case, the water ingress detection unit 90 detects water in the housing 22 when at least one of the two water ingress detection sensors 64 detects that the water level has reached a predetermined height. Furthermore, when water ingress in the connecting housing 26 is detected in the connecting housing 26, the housing control board 68 of that connecting housing 26 notifies the overall control board 70 of the controlling housing 24 via the communication line 14 that the connecting housing 26 has been flooded. Furthermore, when water ingress in the controlling housing 24 is detected in the controlling housing 24, the housing control board 68 of that controlling housing 24 directly notifies the overall control board 70 that the controlling housing 24 has been flooded.

[0058] The overall control board 70 receives notification that a housing 22 has been flooded and generates a preparation command. The generated preparation command is sent to the housing control board 68 of each housing 22. The preparation command is a command to instruct the housing control board 68 of each housing 22 to execute preparation processing. The preparation processing is a process for storing data (such as the above-mentioned flags) temporarily stored in the RAM 76 in the ROM 80 of the overall control board 70 prior to the termination processing. The preparation command is also information for notifying the housing control board 68 of each housing 22 that flooding has occurred. Therefore, the preparation command is information indicating an instruction to store data in the ROM 80 and a notification of flooding.

[0059] The housing control board 68 of each housing 22 receives the preparation command and is able to recognize that flooding has occurred. Furthermore, the housing control board 68 of each housing 22 receives the preparation command and executes preparation processing. In the preparation processing, the housing control board 68 transmits data stored in RAM 76 to the overall control board 70. When the housing control board 68 transmits the data to the overall control board 70, the preparation processing on the housing control board 68 is completed.

[0060] The integrated control board 70 stores the data transmitted from each housing control board 68 in the ROM 80.

[0061] The data stored in the RAM 76 of each housing 22 may be stored in a nonvolatile storage unit (e.g., a ROM) provided in a remote device such as a server that exists outside the power device 10 and can communicate with the integrated control board 70 via the communication unit 74. In this case, the integrated control board 70 transmits the data transmitted from each housing control board 68 to the remote device via the communication unit 74. Alternatively, the integrated control board 70 may store the data transmitted from each housing control board 68 in the ROM 80 and transmit the data to the remote device via the communication unit 74. The remote device stores the received data in the nonvolatile storage unit.

[0062] After storing all data in ROM 80, the overall control board 70 generates a termination command to instruct the execution of termination processing. Note that, if all data is to be stored in the nonvolatile storage unit of the remote device, the overall control board 70 generates the termination command after transmitting all data to the remote device. Alternatively, the overall control board 70 may transmit all data to the remote device, and then generate the termination command when it receives notification from the remote device that all data has been stored in the nonvolatile storage unit. The generated termination command is transmitted to the housing control board 68 of each housing 22.

[0063] The housing control board 68 of each housing 22 receives the termination command and executes the termination process.

[0064] In the termination process, the housing control board 68 supplies a control signal to the tripping unit 48 to instruct it to cut off the electrical connection between the outside of the housing 22 and the inverter 50. Upon receiving the control signal from the housing control board 68, the tripping unit 48 cuts off the electrical connection between the outside of the housing 22 and the inverter 50. This cuts off the supply of power from the outside of the housing 22 to the battery 32 or the output of power from the housing 22 to the outside.

[0065] Furthermore, in the termination process, the housing control board 68 stops the operation of the inverter 50 and the multiple DC / DC converters 52, 58. This stops the power supply to the control box 54 and the multiple slot-side boards 60. As a result, the operation of the housing 22 ends.

[0066] The timer 78 of the housing control board 68 may start timing from the time when it is detected that the housing 22 has been submerged in water. Alternatively, if the preparation command includes information about the time when it was detected that the housing 22 was submerged in water, the timer 78 may start timing from that time. As a result, even if the housing control board 68 is unable to receive the termination command for some reason, it can still consider the termination command to have been issued (consider the termination command to have been generated) when the timer 78 has counted a predetermined amount of time from that time, and execute the termination process. Note that one possible reason for this is that the master housing 24 ends its operation before the connecting housings 26, preventing the termination command from being received. Alternatively, because signals or information are transmitted and received in a daisy chain, the connecting housing 26 at the upstream end of the communication path 16 ends its operation first, preventing the connecting housing 26 at the end of the communication path 16 from receiving the termination command.

[0067] The predetermined time measured by the timer 78 may be changed as appropriate. That is, the predetermined time is set to a sufficiently long time so that the termination process is reliably executed after the data is stored in the ROM 80. That is, when the timer 78 reaches the predetermined time, the data has already been stored in the ROM 80.

[0068] The power device 10 according to this embodiment is configured as described above. Next, the operation of the power device 10 will be described with reference to the flowcharts of Figures 6 and 7. Here, we will mainly explain how the operation of the power device 10 is terminated when flooding of the housing 22 (see Figures 1 and 2) is detected.

[0069] In step S1 (acquisition step), when multiple housings 22 constituting the power device 10 (see Figure 1) are operating, the housing control board 68 (see Figures 3 and 4) of each housing 22 determines whether at least one of the two water flood detection sensors 64 (see Figure 2) arranged within the housing 22 has detected that the water level has reached a predetermined height position.

[0070] In step S1, if the output voltage Vs of the series circuit of the resistor 94 and the capacitor 96 (see FIG. 5A) is 0 V (step S1: NO), the housing control board 68 proceeds to step S2. In step S2, the housing control board 68 determines that the water level has not reached a predetermined height position and that the housing 22 is not flooded, because the output voltage Vs is 0 V.

[0071] In step S3, the housing control board 68 determines whether or not a preparation command including a notice that another housing 22 has been flooded has been notified from the general control board 70.

[0072] If a preparation command has not been notified (step S3: NO), the housing control board 68 proceeds to step S4. In step S4, the housing control board 68 resets the timer 78 to 0. The housing control board 68 then returns to step S1 and repeats the processing of steps S1 to S4. Therefore, if all housings 22 are not submerged in water, the housing control board 68 of each housing 22 repeats the processing of steps S1 to S4.

[0073] In step S1, if the output voltage Vs of the resistor 94 and the capacitor 96 (see FIG. 5B) reaches a predetermined voltage level (step S1: YES), the housing control board 68 proceeds to step S5 (acquisition step). In step S5, the housing control board 68 determines that the water level has reached a predetermined height position and that the housing 22 that houses the housing control board 68 has been flooded.

[0074] In step S6, the housing control board 68 causes the timer 78 to start counting time.

[0075] In step S7, the housing control board 68 notifies the overall control board 70 that the housing 22 housing the housing control board 68 has been flooded.

[0076] In step S8, the integrated control board 70 receives the notification that the housing 22 has been flooded and sends a preparation command to the housing control boards 68 of all the housings 22.

[0077] In step S9, the housing control board 68 determines whether a preparation command has been sent from the overall control board .

[0078] If a preparation command is notified (step S9: YES), the housing control board 68 proceeds to step S10 (first processing step) in FIG. 7. In step S10, the housing control board 68 (see FIGS. 3 and 4) receives the preparation command and executes preparation processing. In the preparation processing, the housing control board 68 transmits data stored in RAM 76 to the overall control board 70. The preparation processing ends when the data is transmitted to the overall control board 70.

[0079] In step S11, the integrated control board 70 stores (memorizes) the data transmitted from each housing control board 68 in the ROM 80. Alternatively, the integrated control board 70 transmits the data transmitted from each housing control board 68 to a remote device and stores (memorizes) the data in a non-volatile memory unit of the remote device. Alternatively, the integrated control board 70 stores (memorizes) the data transmitted from each housing control board 68 in both the ROM 80 and the non-volatile memory unit of the remote device.

[0080] After all data has been stored (memorized) in ROM 80, or after all data has been transmitted from the master control board 70 to a remote device, in step S12 (generation step), the master control board 70 notifies the housing control boards 68 of all housings 22 of a termination command.

[0081] In step S13, the housing control board 68 determines whether or not an end command has been sent from the overall control board 70.

[0082] If a termination command has been notified (step S13: YES), the housing control board 68 proceeds to step S14 (second processing step). In step S14, the housing control board 68 receives the termination command and executes termination processing. In the termination processing, the housing control board 68 controls the tripping unit 48 to cut off the electrical connection between the outside of the housing 22 and the inverter 50. This cuts off the supply of power to the inverter 50 from the outside of the housing 22. Also, in the termination processing, the housing control board 68 stops the operation of the inverter 50 and the multiple DC / DC converters 52. This stops the supply of power to the control box 54 and the multiple slot-side boards 60. As a result, the operation of the housing 22 ends.

[0083] In step S13, if an end command has not been notified (step S13: NO), the housing control board 68 proceeds to step S15. In step S15, the housing control board 68 determines whether the time T measured by the timer 78 has exceeded the threshold time Tth.

[0084] If the time T measured by the timer 78 exceeds the threshold time Tth (T>Tth, step S15: YES), the housing control board 68 assumes that a termination command has been sent from the overall control board 70, even if no termination command has been sent, and executes the termination processing of step S14.

[0085] Furthermore, if the time T has not reached the threshold time Tth (T≦Tth, step S15: NO), the housing control board 68 determines that termination processing should not be performed, and repeatedly executes the determination processing of step S13.

[0086] 6, even if the housing 22 that houses the housing control board 68 (see FIGS. 3 and 4) is not flooded, if a preparation command is received from the integrated control board 70 (step S3: YES), the housing control board 68 proceeds to step S16. In step S16, the housing control board 68 determines from the contents of the preparation command that another housing 22 has been flooded, and starts timing of the timer 78. Thereafter, the housing control board 68 proceeds to step S10 in FIG. 7 and executes preparation processing.

[0087] In the above description, a case has been described in which commands (preparation command, termination command) are sent from the master control board 70 to the housing control boards 68 of all housings 22. In this embodiment, a termination command may be sent from the master control board 70 only to the housing control board 68 of the master housing 24. In this case, the housing control board 68 of the master housing 24 receives the termination command and executes termination processing to terminate the operation of the master housing 24. This causes communication to be interrupted between the master housing 24 and the multiple connected housings 26. Since communication has been interrupted, the housing control boards 68 of the multiple connected housings 26 may assume that the master housing 24 has finished its operation (assuming that a termination command has been issued), and may execute termination processing after the timer 78 has counted a predetermined time.

[0088] This embodiment has the following advantages.

[0089] As shown in FIGS. 6 and 7 , in this embodiment, after it is determined that the water level has reached a predetermined height, a preparatory process for shutting down the power device 10 is executed. Thereafter, when it is determined that the preparatory process has been completed, or when a predetermined time has elapsed since the water level reached the predetermined height, a termination command for shutting down the power device 10 is generated. Next, based on the generated termination command, a termination process for shutting down the power device 10 is executed. Thus, in this embodiment, even if an emergency shutdown is required due to flooding, the termination process is executed after the preparatory process is completed. This allows shutdown after data to be secured is reliably stored. As a result, it is possible to reliably prevent data from being erased when the inverter 50 (electrical operating unit) is disconnected from the outside of the power device 10. Storing data before the termination process can reduce operational problems when the power device 10 is restarted, problems acquiring data related to the power device 10, and the like.

[0090] Furthermore, when it is determined that the water level of one of the multiple housings 22 has reached a predetermined height position above the installation surface 42, preparation processing is executed in the other housings 22. This makes it possible to shut down the other housings 22 in response to the fact that one housing 22 is submerged in water.

[0091] 1, another housing 22 is located closer to the end of the communication path 16 of the communication line 14 than one housing 22. This makes it possible to start preparation processing in the other housing 22 when communication with the one housing 22 is not possible.

[0092] As shown in FIGS. 3, 4, 6, and 7, when the housing control board 68 (internal control unit) of at least one of the multiple housings 22 notifies the overall control board 70 (overall control unit) that the housing 22 has been flooded, a preparation command is transmitted from the overall control board 70 to the housing control boards 68 of the multiple housings 22. In response to the preparation command, all housing control boards 68 can store data stored in their RAMs 76 (volatile storage units) in at least one of their ROMs 80 (nonvolatile storage units) and the nonvolatile storage units of an external remote device, such as a server. After all data stored in the RAMs 76 of the multiple housings 22 has been stored in the ROM 80 or transmitted to the remote device, the overall control board 70 transmits a termination command to the housing control boards 68 of the multiple housings 22. In response to the termination command, all housing control boards 68 can control their tripping units 48 (disconnectors) to disconnect the inverter 50 from the outside of the housing 22.

[0093] 5A to 7, the timer 78 starts timing when the water submersion detection unit 90 detects that the water level has reached a predetermined height, or when the housing control board 68 receives a preparation command from the overall control board 70. As a result, even if a termination command is not received, the housing control board 68 can execute termination processing when a predetermined time has elapsed since the timer 78 started timing.

[0094] 1, multiple housings 22 are connected in a line on the communication path 16, and transmit and receive signals or information in a daisy chain manner. As a result, if a housing 22 (connected housing 26) at the end of the communication path 16 cannot transmit or receive signals or information to or from the central housing 22 (control housing 24), it can determine that the central housing 22 has performed termination processing and can perform the termination processing itself.

[0095] In addition to the above disclosure, the following additional notes are disclosed.

[0096] (Appendix 1) The method for shutting down an electric power device includes: an acquisition step (S1, S5) for acquiring that the water level has reached a predetermined height position from an installation surface (42) of the electric power device (10); a first processing step (S10) for executing a preparation process for shutting down the electric power device when it is acquired in the acquisition step that the water level has reached the predetermined height position; a generation step (S12) for generating a termination command for shutting down the electric power device when it is acquired in the first processing step that the preparation process has been completed or when it is acquired in the acquisition step that a predetermined time has elapsed since it was acquired that the water level has reached the predetermined height position; and a second processing step (S14) for executing a termination process for shutting down the electric power device when the termination command is received.

[0097] According to this method, after it is determined that the water level has reached a predetermined height, a preparatory process for shutting down the power device is executed. When it is determined that the preparatory process is complete, or when a predetermined time has elapsed since the water level reached the predetermined height, a termination command for shutting down the power device is generated. Based on the generated termination command, the termination process for shutting down the power device is executed. As such, in the present invention, even if an emergency shutdown is required due to flooding, the termination process is executed after the preparatory process is completed. This makes it possible to shut down the power device after reliably storing data that needs to be secured. As a result, it is possible to reliably prevent data from being erased when the electrical operating unit is disconnected from the outside of the power device. By storing data before the termination process is executed, it is possible to prevent operational problems when the power device is restarted, problems with acquiring data related to the power device, and the like.

[0098] (Appendix 2) In the method for shutting down an electric power device described in Appendix 1, the electric power device has a plurality of housings (22) that are connected to each other via communication lines (14) and formed independently, and when it is acquired in the acquisition step that the water level has reached the predetermined height position from the installation surface of one of the plurality of housings, the first processing step may execute a preparatory process for shutting down another of the plurality of housings.

[0099] According to this method, when it is determined that the water level has reached a predetermined height from the installation surface of one of the multiple housings, preparation processing is executed in the other housings, which makes it possible to shut down the other housings in response to the flooding of one housing.

[0100] (Appendix 3) In the method for terminating a power device according to Supplementary Note 2, the other housing may be a housing located closer to the end of the communication path (16) of the communication line than the one housing.

[0101] According to this method, the other housing is located closer to the end of the communication path than the first housing, so that even if communication with the first housing is not possible, the other housing can start the termination process.

[0102] (Appendix 4) In the method for shutting down an electric power device described in Supplementary Note 3, each of the plurality of housings houses an electric storage device (32), an electric operation unit (50, 52, 58) electrically connected to the electric storage device, a connection / disconnection unit (48) that electrically connects or disconnects the electric operation unit to the outside of the housing, an internal control unit (68) that controls the electric storage device, the electric operation unit, and the connection / disconnection unit, a volatile memory unit (76) that temporarily stores data related to the housing, and a water ingress detection unit (90), The storage unit is disposed inside the housing above the predetermined height position, the one housing is a master housing (24) that controls the plurality of housings in an integrated manner via the communication line, the other housings are connecting housings (26) controlled by the master housing, the master housing further houses a master control unit (70) for controlling the plurality of housings in an integrated manner and a non-volatile storage unit (80), the master control unit and the non-volatile storage unit are disposed inside the master housing above the predetermined height position, and the acquisition step In the step, when the water flooding detection unit detects that the water level has reached the predetermined height position in at least one of the multiple housings, the internal control unit notifies the central control unit that the housing is flooded, and in the first processing step, the central control unit sends a preparation command to the internal control units of the multiple housings, notifying them of the water flooding and instructing them to store the data in the non-volatile memory unit, and after receiving the preparation command, the internal control unit stores the data stored in the volatile memory unit in the non-volatile memory unit or transmits it to an external device installed so as to be able to communicate with the power device, and in the generation step, when all of the data stored in the volatile memory units of the multiple housings have been stored in the non-volatile memory unit or have been transmitted to the external device, the central control unit generates the termination command and transmits it to the internal control units of the multiple housings, and in the second processing step, after receiving the termination command, the internal control unit controls the connection / disconnection unit to disconnect the electrical operating unit from the outside of the housing.

[0103] According to this method, when the internal control unit of at least one of the multiple housings notifies the central control unit that the housing has been flooded, the central control unit transmits a preparation command to the internal control units of the multiple housings. In response to the preparation command, all internal control units can store data stored in their volatile storage units in their nonvolatile storage units or in a nonvolatile storage unit of an external device that is installed so as to be able to communicate with the power device. Furthermore, after all data stored in the volatile storage units of the multiple housings has been stored in the nonvolatile storage units or when all data has been transmitted to the external device, the central control unit transmits a termination command to the internal control units of the multiple housings. In response to the termination command, all internal control units can control the connection / disconnection units to disconnect the electrically operated units from the outside of the housing.

[0104] (Appendix 5) In the method for shutting down an electric power device described in Appendix 4, each of the multiple housings further houses a timing unit (78) arranged above the predetermined height position, and the timing unit starts timing when the flood detection unit detects that the water level has reached the predetermined height position or when the internal control unit receives the preparation command from the central control unit, and in the second processing step, even if the internal control unit has not received the termination command from the central control unit, the internal control unit may consider that the termination command has been issued when the predetermined time has elapsed since the timing unit started timing, and control the disconnecting unit to cut off the electrical operating unit from the outside of the housing.

[0105] According to this method, the timer starts timing when the flood detection unit detects that the water level has reached a predetermined height, or when the internal control unit receives a preparation command from the general control unit. As a result, even if a termination command has not been received from the general control unit, the internal control unit can assume that a termination command has been issued when a predetermined time has passed since the timer started timing, and control the disconnector to disconnect the electrically operated unit from the outside of the housing.

[0106] (Appendix 6) In the method for terminating a power device according to Supplementary Note 4 or 5, the plurality of enclosures may be connected in a line on the communication path, and may transmit and receive signals or information in a daisy chain manner.

[0107] According to this method, multiple enclosures are connected in a line on a communication path and send and receive signals or information in a daisy chain format. As a result, if an enclosure at the end of the communication path is unable to send or receive signals or information to or from the central enclosure, it determines that the central enclosure has performed termination processing and can perform termination processing itself.

[0108] (Appendix 7) A program for causing a computer (68, 70) to execute the method for shutting down the power device according to any one of Supplementary Notes 1 to 6.

[0109] (Appendix 8) A storage medium (76, 80) that stores the program described in Supplementary Note 7.

[0110] (Appendix 9) An electric power device to be installed on an installation surface, the electric power device comprising: a water level acquisition unit (90) that acquires information that the water level has reached a predetermined height position from the installation surface; a first processing unit (68) that executes preparatory processing to shut down the electric power device when the water level acquisition unit acquires information that the water level has reached the predetermined height position; a termination command generation unit (70) that generates a termination command to shut down the electric power device when it acquires information that the preparatory processing has been completed or when a predetermined time has elapsed since it acquired information that the water level has reached the predetermined height position; and a second processing unit (68) that executes termination processing to shut down the electric power device based on the termination command.

[0111] According to this configuration, after it is determined that the water level has reached a predetermined height, a preparatory process for shutting down the power device is executed. When it is determined that the preparatory process is complete, or when a predetermined time has elapsed since the water level reached the predetermined height, a termination command for shutting down the power device is generated. Based on the generated termination command, the termination process for shutting down the power device is executed. As such, in the present invention, even if an emergency shutdown is required due to flooding, the termination process is executed after the preparatory process is completed. This makes it possible to shut down the power device after reliably storing data that needs to be secured. As a result, it is possible to reliably prevent data from being erased when the electrical operating unit is disconnected from the outside of the power device. By storing data before the termination process is executed, it is possible to prevent operational problems when the power device is restarted, problems with acquiring data related to the power device, and the like.

[0112] The present invention is not limited to the above disclosure, and various configurations can be adopted without departing from the gist of the present invention. [Explanation of symbols]

[0113] 10…Power equipment 68... Housing control board (first processing unit, second processing unit, internal control unit, computer) 70...General control board (termination command generation unit, general control unit, computer) 76...RAM (storage medium) 80...ROM (storage medium) 90...Flood detection unit (water level acquisition unit)

Claims

1. an acquiring step of acquiring that the water level has reached a predetermined height position from the installation surface of the power device; a first processing step of executing a preparation process for shutting down the power device when it is determined in the determination step that the water level has reached the predetermined height position; a generating step of generating a termination command to terminate the power device when it is determined in the first processing step that the preparation processing has been completed, or when it is determined in the obtaining step that a predetermined time has elapsed since it was determined that the water level has reached the predetermined height position; a second processing step of executing a termination process for shutting down the power device when the termination command is received; Including, The power device has a plurality of housings that are connected to each other via communication lines and are formed independently of each other, A method for shutting down an electric power device, wherein when the acquisition step acquires that the water level has reached the predetermined height position from the installation surface of one of the multiple enclosures, the first processing step executes preparatory processing for shutting down other of the multiple enclosures.

2. 2. The method for terminating a power device according to claim 1, A method for terminating a power device, wherein the other housing is a housing located closer to the end than the first housing on a communication path via the communication line.

3. 3. The method for terminating a power device according to claim 2, Each of the plurality of housings comprises: a power storage device; an electric operation unit electrically connected to the power storage device; a connection / disconnection unit that electrically connects or disconnects the electrical operation unit to or from the outside of the housing; an internal control unit that controls the power storage device, the electrical operation unit, and the connection / disconnection unit; a volatile storage unit that temporarily stores data related to the housing; A water ingress detection unit; Accommodates The power storage device, the electrical operation unit, the connection / disconnection unit, the internal control unit, and the volatile memory unit are arranged inside the housing at a height above the predetermined height position.

4. In the method for terminating the power device according to claim 3, the one housing is a control housing that controls the plurality of housings in an integrated manner via the communication line, the other housing is a link housing controlled by the master housing, the master housing further houses a master control unit for performing master control over the plurality of housings and a nonvolatile storage unit; The method for shutting down a power device, wherein the central control unit and the nonvolatile storage unit are disposed inside the central housing and above the predetermined height position.

5. In the method for terminating the power device according to claim 4, A method for shutting down a power device, wherein in the acquisition step, when the flood detection unit detects that the water level has reached the predetermined height position in at least one of the multiple housings, the internal control unit notifies the general control unit that the housing has been flooded.

6. In the method for terminating the power device according to claim 5, In the first processing step, a preparation command indicating notification of the flooding and an instruction to store the data in the nonvolatile storage unit is transmitted from the central control unit to the internal control units of the plurality of housings; A method for shutting down a power device, in which after receiving the preparation command, the internal control unit stores the data stored in the volatile memory unit as the preparation processing in the non-volatile memory unit, or transmits it to an external device installed so as to be able to communicate with the power device.

7. In the method for terminating the power device according to claim 6, In the generation step, when the data stored in the volatile memory units of the multiple housings has all been stored in the non-volatile memory unit or when the data has all been transmitted to the external device, the integrated control unit generates the termination command and transmits it to the internal control units of the multiple housings.

8. In the method for terminating the power device according to claim 7, In the second processing step, after receiving the termination command, the internal control unit controls the disconnecting unit to disconnect the electrical operating unit from the outside of the casing.

9. 9. The method for terminating a power device according to claim 8, each of the plurality of housings further houses a timing unit disposed above the predetermined height position; The timing unit starts timing when the flood detection unit detects that the water level has reached the predetermined height position or when the internal control unit receives the preparation command from the general control unit, In the second processing step, even if the internal control unit does not receive the termination command from the general control unit, the internal control unit determines that the termination command has been received when the predetermined time has elapsed since the timing unit started timing, and controls the disconnection unit to disconnect the electrical operating unit from the outside of the housing.This is a method for shutting down a power device.

10. The method for terminating an electric power device according to any one of claims 2 to 9, A method for terminating a power device, wherein the plurality of enclosures are connected in a row on the communication path and transmit and receive signals or information in a daisy chain manner.

11. An acquisition step of acquiring that the water level has reached a predetermined height position from the installation surface of the power device; a first processing step of executing a preparation process for shutting down the power device when it is determined in the determination step that the water level has reached the predetermined height position; a generating step of generating a termination command to terminate the power device when it is acquired in the first processing step that the preparation processing has been completed, or when it is acquired in the acquisition step that a predetermined time has elapsed since it was acquired that the water level has reached the predetermined height position; a second processing step of executing a termination process for shutting down the power device when the termination command is received; Including, The power device has a plurality of housings that are connected to each other via communication lines and are formed independently of each other, A program for causing a computer to execute a method for shutting down a power device, which, when it is acquired in the acquisition step that the water level has reached the specified height position from the installation surface of one of the multiple housings, executes preparatory processing for shutting down other housings of the multiple housings in the first processing step.

12. A storage medium that stores the program according to claim 11.

13. An electric power device installed on an installation surface, a water level acquiring unit that acquires that the water level has reached a predetermined height position from the installation surface; a first processing unit that executes a preparation process for shutting down the power device when the water level acquisition unit acquires that the water level has reached the predetermined height position; a termination command generating unit that generates a termination command to terminate the power device when it is determined that the preparation process has been completed or when a predetermined time has elapsed since it was determined that the water level has reached the predetermined height position; a second processing unit that executes a termination process for shutting down the power device based on the termination command; Equipped with The power device has a plurality of housings that are connected to each other via communication lines and are formed independently of each other, A power device in which, when the water level acquisition unit acquires that the water level has reached the predetermined height position from the installation surface of one of the multiple housings, the first processing unit executes preparatory processing for shutting down other housings of the multiple housings.

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