Earthquake sensing device and switchboard

Abstract

To provide an earthquake sensing device capable of cutting off both DC and AC power supplies with a simple configuration.SOLUTION: An earthquake sensing device includes a seismic sensor that detects earthquakes, an AC cutoff unit that cuts off AC, a DC cutoff unit that cuts off DC, and a cutoff control unit that controls the AC cutoff unit and the DC cutoff unit independently of each other. The AC cutoff unit and the DC cutoff unit are integrally configured.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a seismic sensor device and a switchboard.

Background Art

[0002] In order to suppress accidents such as failures and fires of power supply devices when disasters such as earthquakes occur, seismic sensor devices that cut off the supplied power are known (see, for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, with the spread of renewable energy power generation devices such as solar power generation, the number of power supply systems consisting of two types of power sources, an AC power source such as a commercial power source and a DC power source such as a power generation device and a storage battery, is increasing. Therefore, there is a demand for a seismic sensor device that can cut off both DC and AC. Therefore, the present disclosure provides a seismic sensor device that can cut off a DC power source and an AC power source with a simple configuration.

Means for Solving the Problems

[0005] A seismic sensor device according to one aspect of the present disclosure includes a seismic sensor that detects an earthquake, an AC cutoff unit that cuts off AC, a DC cutoff unit that cuts off DC, and a cutoff control unit that controls the AC cutoff unit and the DC cutoff unit independently of each other. The AC cutoff unit and the DC cutoff unit are integrally configured.

Effects of the Invention

[0006] According to the present disclosure, a seismic sensor device is provided that can cut off a DC power supply and an AC power supply with a simple configuration, respectively.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0008] The present disclosure relates to a seismic sensor device 1 and a switchboard 100. In a seismic sensor cutoff system S composed of two system power supplies, an AC power supply such as a commercial power supply and a DC power supply such as a power generation device or a storage battery, DC and AC cutoff controls are performed when an earthquake is detected.

[0009] FIG. 1 is a block diagram of the seismic sensor cutoff system S according to the present embodiment. As shown in FIG. 1, the seismic sensor cutoff system S includes a switchboard 100, an AC power supply 1000, a solar power generation DC circuit 200, a storage battery DC circuit 300, an AC lighting circuit 400, an AC outlet circuit 500, a DC lighting circuit 600, and a DC outlet circuit 700. AC is input to the switchboard 100 from the AC power supply 1000, and DC is input from the solar power generation DC circuit 200 and the storage battery DC circuit 300. Also, AC is output from the switchboard 100 to the AC lighting circuit 400 and the AC outlet circuit 500, and DC is output to the DC lighting circuit 600 and the DC outlet circuit 700. Note that the seismic sensor cutoff system S may be composed of either the solar power generation DC circuit 200 or the storage battery DC circuit 300.

[0010] The distribution board 100 includes a seismic sensor 1, an AC leakage breaker 20, circuit AC breakers 21 and 22, an AC / DC circuit 30, a DC breaker 40, and circuit DC breakers 41, 42, 43, and 44. The AC leakage breaker 20 shuts off the AC supplied from the AC power source 1000. The AC / DC circuit 30 is a bidirectional AC / DC circuit that converts the AC supplied from the AC power source 1000 into DC and converts the DC supplied from the solar power generation DC circuit 200 and the battery DC circuit 300 into AC. The DC breaker 40 shuts off the DC converted by the AC / DC circuit 30 and the DC supplied from the solar power generation DC circuit 200 and the battery DC circuit 300. The circuit DC breaker 41 shuts off the DC flowing through the circuit P1 from the solar power generation DC circuit 200 to the distribution board 100. The circuit DC breaker 42 shuts off the DC flowing through the circuit P2 from the battery DC circuit 300 to the distribution board 100. The circuit AC breaker 21 shuts off the AC flowing through the circuit P3 from the distribution board 100 to the AC lighting circuit 400. The circuit AC breaker 22 shuts off the AC flowing through the circuit P4 from the distribution board 100 to the AC outlet circuit 500. The circuit DC breaker 43 shuts off the DC flowing through the circuit P5 from the distribution board 100 to the DC lighting circuit 600. The circuit DC breaker 44 shuts off the DC flowing through the circuit P6 from the distribution board 100 to the DC outlet circuit 700. The seismic sensor 1 performs shut-off control on the AC leakage breaker 20, the circuit AC breaker 22, the DC breaker 40, and the circuit DC breakers 41, 42, and 44.

[0011] The solar power generation DC circuit 200 is a circuit that supplies DC power generated by a solar power generation device. Here, the solar power generation DC circuit 200 is an example of a renewable energy power generation circuit, and it may be a wind power generation DC circuit, a fuel cell DC circuit, or the like. The battery DC circuit 300 is a circuit that supplies DC power from a battery such as a lead-acid battery or a lithium-ion battery.

[0012] Note that hereinafter, the DC converted from AC, such as the DC converted by the AC / DC circuit 30, is also referred to as the first DC, and the DC supplied from a DC power source, such as the DC supplied from the solar power generation DC circuit 200 and the battery DC circuit 300, is also referred to as the second DC.

[0013] The AC lighting circuit 400 is a lighting circuit driven by an AC power source. The AC outlet circuit 500 is an outlet circuit driven by an AC power source. The DC lighting circuit 600 is a lighting circuit driven by a DC power source. The DC outlet circuit 700 is an outlet circuit driven by a DC power source. Here, the AC lighting circuit 400 and the DC lighting circuit 600 are lighting circuits used for evacuation routes in the event of a disaster such as an earthquake. Therefore, when the earthquake sensing device 1 detects an earthquake, the AC circuit breaker 22 for the AC outlet circuit 500 and the DC circuit breaker 44 for the DC outlet circuit 700 are tripped preferentially over the AC circuit breaker 21 for the AC lighting circuit 400 and the DC circuit breaker 43 for the DC lighting circuit 600.

[0014] FIG. 2 is an internal block diagram of the earthquake sensing device 1 according to the present embodiment. As shown in FIG. 2, the earthquake sensing device 1 includes an earthquake sensing sensor 2, a cutoff control unit 3, an AC delay time setting unit 4, a DC delay time setting unit 5, a set seismic intensity storage unit 6, an alarm output unit 7, a UI operation unit 8, and a relay R.

[0015] The earthquake sensing sensor 2 is a sensor that detects an earthquake. Specifically, for example, it detects a first seismic intensity (e.g., seismic intensity 4), a second seismic intensity greater than the first seismic intensity (e.g., strong seismic intensity 5), and a third seismic intensity greater than the second seismic intensity (e.g., seismic intensity 7). In this example, the earthquake sensing sensor 2 detects three seismic intensities, namely the first seismic intensity, the second seismic intensity, and the third seismic intensity. However, it may detect two or less seismic intensities, or four or more seismic intensities.

[0016] Relay R has a first AC contact A1, a second AC contact A2, a first DC contact D1, a second DC contact D2, and a third DC contact D3. The first AC contact A1 can cut off the AC circuit supplied from the AC power supply 1000 in the AC leakage breaker 20. As a result, AC no longer flows from the AC leakage breaker 20 to the downstream (AC lighting circuit 400, AC outlet circuit 500, and AC / DC circuit 30) (see Fig. 1). The second AC contact A2 can cut off the circuit AC breaker 22. As a result, AC no longer flows to the AC outlet circuit 500. The first DC contact D1 can cut off the DC converted in the AC / DC circuit 30 in the DC breaker 40. As a result, the first DC no longer flows from the DC breaker 40 to the downstream (DC lighting circuit 600, DC outlet circuit 700) (see Fig. 1). The second DC contact D2 cuts off the circuit DC breakers 41 and 42. As a result, the second DC no longer flows from the circuits P1 and P2 to the downstream (DC lighting circuit 600, DC outlet circuit 700) (see Fig. 1). The third DC contact D3 cuts off the circuit DC breaker 44. As a result, DC (the first DC and the second DC) no longer flows to the DC outlet circuit 700.

[0017] Hereinafter, the first AC contact A1 and the second AC contact A2 are collectively referred to as the AC cutoff section, the first DC contact D1 and the third DC contact D3 are collectively referred to as the first DC cutoff section, and the second DC contact D2 is also referred to as the second DC cutoff section. Also, the first AC cutoff section and the second AC cutoff section are collectively referred to as the AC cutoff section.

[0018] In addition, in relay R, the AC cutoff section and the DC cutoff section are integrally configured. Therefore, compared with a configuration that cuts off AC and DC separately, it is possible to cut off DC and AC with a simple configuration. Here, the fact that the AC cutoff section and the DC cutoff section are integrally configured means that the AC cutoff section and the DC cutoff section are mounted on a common substrate and configured as a single relay R.

[0019] The cutoff control unit 3 controls the DC cutoff unit and the AC cutoff unit of the relay R with reference to the seismic intensity of the earthquake detected by the seismic sensor 2, the DC delay time setting unit 5, the set seismic intensity storage unit 6, and the operation timing set in the set seismic intensity storage unit 6.

[0020] In addition, the cutoff control unit 3 is composed of a memory and a processor. The memory is configured to store computer-readable instructions (programs). For example, the memory is composed of a ROM (Read Only Memory) storing various programs and the like, a RAM (Random Access Memory) storing various programs executed by the processor, and the like. The processor is composed of, for example, at least one of a CPU (Central Processing Unit), an MPU (Micro Processing Unit), and a GPU (Graphics Processing Unit). The processor may be configured to expand a program specified from various programs incorporated in a storage device or ROM onto the RAM and execute various processes in cooperation with the RAM.

[0021] The operation timing of the AC cutoff unit (first AC contact A1, second AC contact A2) for each seismic intensity of the earthquake is set in the AC delay time setting unit 4. The operation timing of the DC cutoff unit (first DC contact D1 to third DC contact D3) for each seismic intensity of the earthquake is set in the DC delay time setting unit 5. Note that the operation timings of the first AC contact A1 and the second AC contact A2 may be the same as or different from each other. Similarly, the operation timings of the first DC contact D1, the second DC contact D2, and the third DC contact D3 may be the same as or different from each other.

[0022] An example of the operation timings of the AC cutoff unit and the DC cutoff unit set by the AC delay time setting unit 4 and the DC delay time setting unit 5 will be described with reference to FIG. 3. FIG. 3 is a setting table for the seismic cutoff process according to the present embodiment.

[0023] In the example of FIG. 3, when the seismic sensor 2 detects the first seismic intensity (for example, seismic intensity 4), the cutoff control unit 3 outputs a cutoff signal to the second AC contact A2 10 minutes after the earthquake detection, and cuts off the AC circuit breaker 22 for the circuit. At this time, no cutoff signal is output to the first AC contact A1, the first DC contact D1, the second DC contact D2, and the third DC contact D3. Also, when the seismic sensor 2 detects the second seismic intensity (for example, strong seismic intensity 5), the cutoff control unit 3 outputs a cutoff signal to the first AC contact A1 and the second AC contact A2, immediately cuts off the AC leakage breaker 20 and the AC circuit breaker 22 for the circuit, and outputs a cutoff signal to the first DC contact D1 and the third DC contact D3 3 minutes after the earthquake detection, and cuts off the DC breaker 40 and the DC circuit breaker 44 for the circuit. At this time, no cutoff signal is output to the second DC contact D2. Also, when the seismic sensor 2 detects the third seismic intensity (for example, seismic intensity 7), the cutoff control unit 3 outputs a cutoff signal to the first AC contact A1, the second AC contact A2, the first DC contact D1, the second DC contact D2, and the third DC contact D3, and immediately cuts off the AC leakage breaker 20, the AC circuit breaker 22 for the circuit, the DC breaker 40, the DC circuit breaker 42 for the circuit, and the DC circuit breaker 44 for the circuit. In this way, the cutoff control unit 3 preferentially cuts off in the order of AC, the first DC, and the second DC. With the above configuration, the seismic sensing device 1 can cut off only the circuit breakers for the circuits that need to be cut off among the plurality of AC circuit breakers for the circuits and the plurality of DC circuit breakers for the circuits at an appropriate timing according to the seismic intensity of the earthquake.

[0024] Return to the description of FIG. 2. The set seismic intensity storage unit 6 stores the operating conditions of the cutoff control unit 3 set by the user. The operating conditions of the cutoff control unit 3 include, for example, whether to operate the AC cutoff unit and the DC cutoff unit respectively, and the respective operating timings of the AC cutoff unit and the DC cutoff unit. The operating conditions of the cutoff control unit 3 set by the user are overwritten in the set table of the seismic sensing cutoff process shown in FIG. 3. With the above configuration, the seismic sensing device 1 can appropriately cut off DC and AC respectively according to the user's requirements.

[0025] When the earthquake intensity sensor 2 detects a predetermined earthquake intensity, the alarm output unit 7 outputs an alarm sound to the user and causes the UI operation unit 8 to display an alarm screen composed of characters or the like. For example, when the earthquake intensity sensor 2 detects an earthquake of the second earthquake intensity (intensity 5 strong) or higher, the alarm output unit 7 outputs an alarm sound from a speaker (not shown) or the like and causes the UI operation unit 8 to display an alarm screen. Note that the alarm output unit 7 may increase the volume of the alarm sound output as the earthquake intensity increases, or may increase the size of characters or the like included in the alarm screen or change the color of characters or the like as the earthquake intensity increases.

[0026] The UI operation unit 8 is a user interface having a display function composed of a touch panel type liquid crystal display or the like. The UI operation unit 8 displays a warning screen or the like output from the alarm output unit 7. Further, the user can set the operating conditions of the cutoff control unit 3 through the UI operation unit 8.

[0027] FIG. 4 is a flowchart of the earthquake intensity cutoff process according to the present embodiment. As shown in FIG. 4, the measurement of the earthquake intensity by the earthquake intensity sensor 2 is started (S101). When the earthquake intensity sensor 2 detects an earthquake of the third earthquake intensity (intensity 7) or higher (Yes in S102), the alarm output unit 7 outputs an alarm sound and causes the UI operation unit 8 to display an alarm screen (S103). Further, the cutoff control unit 3 outputs a cutoff signal from the first AC contact A1, the second AC contact A2, the first DC contact D1, the second DC contact D2, and the third DC contact D3 on the earthquake intensity relay side to the contacts according to the setting table shown in FIG. 3, and shuts off the breaker (S104).

[0028] When the earthquake intensity sensor 2 detects an earthquake of the second earthquake intensity (intensity 5 strong) (No in S102, Yes in S105), the alarm output unit 7 outputs an alarm sound and causes the UI operation unit 8 to display an alarm screen (S106). Further, the cutoff control unit 3 outputs a cutoff signal from the first AC contact A1, the second AC contact A2, the first DC contact D1, and the third DC contact D3 on the earthquake intensity relay side to the contacts according to the setting table shown in FIG. 3, and shuts off the breaker (S107).

[0029] When the first seismic intensity (seismic intensity 4) is detected by the seismic sensor 2 (No in S105, Yes in S108), the cutoff control unit 3 outputs a cutoff signal from the second AC contact point A2 on the seismic relay side to cut off the breaker according to the setting table shown in FIG. 3 (S109). When the detected seismic intensity is 4 or less (No in S108), the cutoff control unit 3 does not output a cutoff signal from the AC cutoff unit and the AC cutoff unit, and all circuits are energized.

[0030] As described above, in the seismic device according to the present embodiment, since the AC cutoff unit and the DC cutoff unit are integrally configured and the AC cutoff unit and the DC cutoff unit can be controlled independently of each other, the DC power supply and the AC power supply can be cut off with a simple configuration.

[0031] As described above, the embodiments of the present invention have been described. Needless to say, the technical scope of the present invention should not be construed as being limited by the description of the present embodiment. The present embodiment is merely an example, and those skilled in the art will understand that various modifications of the embodiments are possible within the scope of the invention described in the claims. The technical scope of the present invention should be determined based on the scope of the invention described in the claims and its equivalent scope.

[0032] For example, in the present embodiment, the seismic device 1 is configured to include an AC delay time setting unit 4, a DC delay time setting unit 5, and a set seismic intensity storage unit 6. However, as another embodiment, the AC delay time setting unit 4, the DC delay time setting unit 5, and the set seismic intensity storage unit 6 may be provided in an external server (not shown). Thereby, the setting tables of the seismic cutoff processes of the plurality of seismic cutoff systems S can be centrally managed on the server.

[0033] Also, as another embodiment, the seismic device 1 may further include an inclination sensor, and the cutoff control unit 3 may control the AC cutoff unit and the AC cutoff unit according to the seismic intensity detected by the seismic sensor 2 and the inclination of the switchboard 100 detected by the inclination sensor. Thereby, the DC power supply and the AC power supply can be appropriately cut off.

Explanation of reference numerals

[0034] 1: Seismic sensor device 2: Seismic sensor 3: Cut-off control unit 4: AC delay time setting unit 5: DC delay time setting unit 6: Set seismic intensity memory unit 7: Alarm output unit 8: UI operation unit 20: AC leakage breaker 21, 22: Circuit AC breaker 30: AC / DC circuit 40: DC breaker 41, 42, 43, 44: Circuit DC breaker 100: Switchboard 200: Photovoltaic DC circuit 300: Battery DC circuit 400: AC lighting circuit 500: AC outlet circuit 600: DC lighting circuit 700: DC outlet circuit 1000: AC power supply P1~P6: Circuit S Seismic cut-off system

Claims

1. A seismic sensor for detecting an earthquake, An AC interruption section for interrupting AC, A DC interruption section for interrupting DC, And an interruption control section for independently controlling the AC interruption section and the DC interruption section, A seismic device in which the AC interruption section and the DC interruption section are integrally configured.

2. The interruption control section controls the AC interruption section and the DC interruption section respectively according to the seismic intensity of the earthquake detected by the seismic sensor. The seismic device according to claim 1.

3. The interruption control section determines whether to operate the AC interruption section and the DC interruption section respectively according to the seismic intensity of the earthquake detected by the seismic sensor. The seismic device according to claim 2.

4. The interruption control section determines the respective operation timings of the AC interruption section and the DC interruption section according to the seismic intensity of the earthquake detected by the seismic sensor. The seismic device according to claim 2.

5. The DC interruption section has a first DC interruption section for interrupting the first DC converted from the AC and a second DC interruption section for interrupting the second DC supplied from a DC power source, The interruption control section controls the AC interruption section, the first DC interruption section, and the second DC interruption section so as to interrupt the AC, the first DC, and the second DC in this order. The seismic device according to claim 1.

6. The DC interruption section has a first DC interruption section for interrupting the first DC converted from the AC and a second DC interruption section for interrupting the second DC supplied from a DC power source, The interruption control section, When the seismic intensity is a preset first seismic intensity, controls the AC interruption section so as to interrupt at least a part of a plurality of circuits of the AC, When the seismic intensity is greater than the first seismic intensity and is the preset second seismic intensity, control the AC cutoff unit to cut off all AC circuits, and control the first DC cutoff unit to cut off all DC circuits of the first DC. The seismic sensing device according to claim 2, wherein when the seismic intensity is greater than the second seismic intensity and is the preset third seismic intensity, control the AC cutoff unit to cut off all AC circuits, and control the first DC cutoff unit to cut off all DC circuits of the first DC, and control the second DC cutoff unit to cut off at least a part of a plurality of circuits of the second DC.

7. The seismic sensing device further includes a storage unit capable of storing the operating conditions of the cutoff control unit set by the user. The operating conditions include at least one of whether to operate the AC cutoff unit and the DC cutoff unit respectively, and the operating timing for operating the AC cutoff unit and the DC cutoff unit respectively. The seismic sensing device according to claim 1.

8. A switchboard having the seismic sensing device of claim 1.

9. A seismic sensing device including a seismic sensor for detecting an earthquake, a relay including a DC contact for cutting off DC and an AC contact for cutting off AC, and a cutoff control unit for controlling the relay to be able to cut off the DC contact and the AC contact independently of each other according to the output of the seismic sensor.

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