JP6847507B2 - Load protection system - Google Patents

Description

The present invention relates to a load protection system. More specifically, it relates to a load protection system that protects the load from lightning surges.

Conventionally, the load (equipment) connected to the distribution board has been protected from lightning. Conventionally, the distribution board is protected from lightning strikes by using a lightning arrester (SPD) to prevent the load from being affected by lightning strikes via the distribution board. For example, Patent Document 1 describes a technique for protecting a load from a lightning strike by devising the arrangement of a lightning arrester on a distribution board.

JP-A-2007-53873

By the way, if a lightning surge exceeding the performance of the lightning arrester invades the distribution board, it becomes difficult for the lightning arrester to protect the distribution board. Therefore, there is a risk that the load connected to the distribution board will be damaged. Further, if a lightning surge is repeatedly applied to the arrester, the arrester deteriorates. If the arrester was damaged due to such a situation, the load could not be protected from the lightning surge.

The inventor of this case tried to solve this problem by diligently examining this point. An object of the present invention is to cut off an electric circuit of a specific load before the lightning strikes directly, and to protect the specific load from destruction by lightning.

In order to solve the above problems, the following means will be adopted. The first means includes a lightning information acquisition means for acquiring lightning information in the surrounding area, a position specifying means for specifying the position where the distribution board is installed, and a control means capable of interrupting the power supply circuit. The control means is connected to a specific load when it is determined that the lightning is approaching by the determination means for determining that the lightning is approaching the position where the distribution board is installed. It is a load protection system that controls to shut off the power supply circuit.

In the first means, the distribution board is provided with a lightning arrester unit for detecting the intrusion of induced lightning, and when the lightning information acquisition means acquires the lightning information detected by the lightning arrester unit, the control means is connected to a specific load. A second means having a configuration in which the power supply circuit is cut off is preferable.

In the first or second means, a third means having a configuration in which the control means also cuts off the grounding circuit connected to a specific load is preferable.

In the first to third means, the auxiliary power supply and the switching means provided between the auxiliary power supply and the specific load are provided, and when the circuit of the specific load is interrupted, the control means switches the switching means. A fourth means of supplying power from the auxiliary power source to the specific load by switching and connecting the auxiliary power source to the specific load is preferable.

In the second to fourth means, the distribution board is provided with a lightning arrester unit for detecting the intrusion of induced lightning, and when the lightning arrester unit detects induced lightning, the lightning information of the lightning information acquisition means is output to the server. Fifth means of doing so is preferred.

According to the load protection system of the present invention, an electric circuit that connects to a specific load before the lightning strikes directly by determining that the lightning is approaching the distribution board by using the lightning information in the surrounding area. Can be blocked. Therefore, it is possible to protect a specific load from destruction by lightning.

It is the schematic of the load protection system of 1st Embodiment. It is the schematic of the load protection system of the 2nd Embodiment. It is the schematic of the load protection system of the 3rd Embodiment. It is the schematic of the load protection system of 4th Embodiment.

A mode for carrying out the invention is shown below. FIG. 1 is a schematic view of the load protection system 1 of the first embodiment. The load protection system 1 of the present embodiment is provided with lightning information acquisition means 6 inside the distribution board 4 to which the load is connected, and the lightning information acquisition means 6 is connected to the server 3 via the network 2. It is connected. The lightning information acquisition means 6 can acquire lightning information from the server 3 via the network 2, and can also output lightning information to the server 3 via the network 2.

The server 3 stores lightning information in the surrounding area. The lightning information stored in the server 3 includes information output from the lightning information acquisition means 6 provided in each distribution board 4, but is not limited to this, and is limited to lightning strike information and lightning strike prediction information on the Internet. , It is possible to incorporate various lightning information. This lightning information can be obtained as information on the occurrence of lightning, such as the presence or absence of lightning strikes in the surrounding area, the distance to the point where lightning strikes, and the frequency of lightning strikes.

Inside the distribution board 4 of the present embodiment, a position specifying means 7 used for specifying the position where the distribution board 4 is installed is provided. This position specifying means 7 is used to identify the place where the distribution board 4 is installed by using GPS (Global Positioning System) or the like. The position specifying means 7 may be provided in the server 3. In this case, the position information of the distribution board 4 input by the external input means or the like is stored in the server 3, and the IP address, MAC address, etc. assigned to the communication device of the distribution board 4 and the position of the distribution board 4 are stored. By associating the information with the information on the server 3, the position information of the distribution board 4 can be specified.

Inside the distribution board 4 of the present embodiment, a determination means 8 for determining that lightning is approaching a position where the distribution board 4 is installed is provided. This determination means 8 is used to determine the approach of lightning from the lightning information of the server 3. The determination condition of the determination means 8 may be any, but for example, lightning is approaching when a plurality of lightning strikes occur within a certain range (around 10 km) for a certain period of time (10 minutes). Can be set to determine.

Inside the distribution board 4 of the present embodiment, the determination means 8 is provided with a control means 9 capable of interrupting the circuit of a specific load 5 when the determination means 8 determines the approach of lightning. More specifically, when the determination means 8 determines that lightning is approaching, the control means 9 uses the power supply circuit release means 52 provided in the power supply circuit 51 that connects the specific load 5 and the distribution board 4. By operating the distribution board 4, the specific load 5 can be electrically separated from each other. Since the load protection system 1 of the present embodiment has such a configuration, it is possible to cut off the electric circuit connecting the specific load 5 and the distribution board 4.

The load protection system 1 configured in this way uses lightning information in the surrounding area to determine that lightning is approaching the distribution board 4, thereby determining a specific load 5 before the lightning strikes directly. The power supply circuit 51 connected to the above can be cut off. Therefore, the specific load 5 can be protected from destruction by lightning.

Further, a grounding circuit 55 is connected to the specific load 5 of the present embodiment. By operating the grounding circuit releasing means 56 provided in the grounding circuit 55 by the control means 9, it is possible to bring the grounding point and the specific load 5 into a state of being electrically separated. Since the load protection system 1 of the present embodiment has such a configuration, it is possible to cut off the grounding circuit 55 connected to the specific load 5. Therefore, the specific load 5 can be in a state of being electrically disconnected from both the power supply circuit 51 and the grounding circuit 55, and the influence of lightning strikes can be suppressed. Here, as a specific addition, for example, a control device, a control computer, or the like. In particular, it is used in facilities for agriculture and livestock industry, and is a control device that controls the environment such as temperature and humidity of the facility.

Next, the second embodiment will be described. FIG. 2 is a schematic view of the load protection system 1 of the second embodiment. In the second embodiment, unlike the first embodiment, the lightning arrester unit 13 is provided in the distribution board 4. The lightning arrester protects the load of the distribution board by letting the induced lightning escape to the ground, and the lightning arrester unit 13 can detect the intrusion of the induced lightning. When the lightning information acquisition means 6 acquires the lightning information detected by the lightning arrester unit 13, the control means 9 is configured to be able to shut off the power supply circuit 51 connected to the specific load 5. When the lightning arrester unit 13 detects the intrusion of induced lightning, a signal may be output directly to the control means 9 to shut off the power supply circuit 51. When the lightning arrester unit 13 detects induced lightning, the lightning information acquisition means 6 outputs lightning information to the server 3 via the network 2 and uses the lightning information to protect the load connected to the distribution board 4 at another location. It is possible. Further, the lightning arrester unit 13 may be provided with a current transformer (CT) so as to measure the current released to the ground.

Next, a third embodiment will be described. FIG. 3 is a schematic view of the load protection system 1 of the third embodiment. The third embodiment differs from the first or second embodiment in that the specific load 5 is configured to be connectable to the auxiliary power source 15. An auxiliary power supply circuit 16 is connected between the auxiliary power supply 15 and the specific load 5, and the auxiliary power supply circuit 16 is provided with switching means 17. The switching means 17 can be operated by the control means 9.

The load protection system 1 of the present embodiment is a control means for connecting the auxiliary power supply 15 which is not normally connected to the specific load 5 to the specific load 5 when the power supply circuit 51 is cut off. It is configured to be operable by 9. Therefore, even if the power supply circuit 51 connected to the specific load 5 is cut off, it is possible to supply power from the auxiliary power source 15 to the specific load 5.

Next, a fourth embodiment will be described. FIG. 4 is a schematic view of the load protection system 1 of the fourth embodiment. In the fourth embodiment, the server 3 includes a lightning information acquisition means 6, a position identification means 7, and a determination means 8. A plurality of distribution boards 4 are connected to the server 3 via the network 2. Each distribution board 4 is provided with lightning information acquisition means 6 and control means 9, and the server 3 is provided with lightning information acquisition means. 6. The position specifying means 7 and the determining means 8 are provided. The lightning information acquisition means 6 on the server 3 acquires various lightning information provided from the external network and lightning information provided from distribution boards in various places, and the position identification means 7 obtains the position information of each distribution board 4. Is specified on the server 3. As a result, the determination means 8 determines the approach of lightning on the server 3, and transmits a signal to the control means 9 of the distribution board 4 determined that the lightning is approaching, whereby the distribution is distributed. The power supply circuit 51 and the grounding circuit 55 connected to the specific load connected to the board 4 are cut off. The control means 9 may be able to individually set whether to perform a blocking operation for a signal provided by the server. The lightning information acquisition means 6 on the distribution board 4 acquires the information of the induced lightning detected by the lightning arrester unit 13 and outputs the lightning information to the server 3.

Although the four embodiments have been described above, the present invention is not limited to the above embodiments and can be in various embodiments. For example, the lightning information acquisition means, the position identification means, the determination means, the control means, the lightning arrester unit, and the like may be installed inside or outside the distribution board.

It is also possible to intervene various devices for information transmission between the lightning information acquisition means and the server.

It is also possible to display lightning information on a map of the surrounding area.

The load that interrupts the power supply circuit may be all loads connected to the distribution board, or may be only some important loads.

1 Load protection system 3 Server 4 Distribution board 5 Specific load 6 Lightning information acquisition means 7 Position identification means 8 Judgment means 9 Control means 13 Lightning arrester unit 15 Auxiliary power supply 51 Power supply circuit 55 Grounding circuit

Claims (6)

Lightning information acquisition means for acquiring lightning information in the surrounding area, position identification means for identifying the position where the distribution board is installed, control means that can shut off the power supply circuit, and intrusion of induced lightning into the distribution board. A lightning protection unit for detecting is provided, and the control means determines that lightning is approaching at a position where the distribution board is installed, when it is determined that lightning is approaching. The power supply circuit connected to a specific load is cut off, and when the lightning information acquisition means acquires the lightning information detected by the lightning protection unit, the control means controls to cut off the power supply circuit connected to the specific load. A load protection system that also cuts off the ground circuit connected to a specific load. The control means is provided with a lightning information acquisition means for acquiring lightning information in the surrounding area, a position specifying means for specifying the position where the distribution board is installed, and a control means capable of interrupting the power supply circuit and the grounding circuit. Is a power supply circuit connected to a specific load when it is determined that lightning is approaching by a determination means for determining that lightning is approaching the position where the distribution board is installed. A load protection system that controls the grounding circuit connected to a specific load to be cut off. It is provided with an auxiliary power supply and a switching means provided between the auxiliary power supply and a specific load.
The first or second claim, wherein when the circuit of a specific load is interrupted, the control means switches the switching means and connects the auxiliary power supply to the specific load to supply power from the auxiliary power source to the specific load. Load protection system. The distribution board is connected to a server via a network, and the distribution board is provided with a lightning arrester unit that detects the intrusion of induced lightning. When the lightning arrester unit detects induced lightning, the lightning information of the lightning information acquisition means is output to the server. The load protection system according to any one of claims 1 to 3. Lightning information acquisition means for acquiring lightning information in the surrounding area, position identification means for specifying the position where the distribution board is installed, control means that can shut off the power supply circuit, and intrusion of induced lightning into the distribution board. A lightning protection unit for detecting is provided, and the control means determines that lightning is approaching at a position where the distribution board is installed. When it is determined that lightning is approaching, the control means determines that lightning is approaching. Controls to shut off the power supply circuit connected to a specific load, and when the lightning information acquisition means acquires the lightning information detected by the lightning protection unit, the control means shuts off the power supply circuit connected to the specific load. The distribution board is connected to a server via a network, and the distribution board is provided with a lightning protection unit that detects the intrusion of induced lightning. When the lightning protection unit detects induced lightning, the lightning information of the lightning information acquisition means is sent to the server. Load protection system that outputs to. It is provided with an auxiliary power supply and a switching means provided between the auxiliary power supply and a specific load.
The load according to claim 5, wherein when the circuit of a specific load is interrupted, the control means switches the switching means and connects the auxiliary power supply to the specific load to supply power from the auxiliary power source to the specific load. Protection system.

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