JP2017221053A - Load protective system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve protection of a specific load from destruction caused by thunder by breaking an electric circuit of the specific load before the thunder directly hits the load.SOLUTION: The load protective system includes: thunder information acquisition means 6 for acquiring thunder information in a peripheral area; position specifying means 7 for specifying a position of a distribution board installed; and control means 9 capable of breaking a power supply circuit 51. The control means controls to break the electric supply circuit connected with a specific load 5, when determination means 8 for determining that a thunder is approaching the position of the distribution board installed determines that a thunder is approaching.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a load protection system. More particularly, the present invention relates to a load protection system that protects a load from lightning surge.

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

JP 2007-53873 A

  By the way, when a lightning surge exceeding the performance of the lightning arrester enters the distribution board, it becomes difficult to protect the distribution board with the lightning arrester. For this reason, the load connected to the distribution board may be damaged. Moreover, if a lightning surge is repeatedly applied to the lightning arrester, the lightning arrester will deteriorate. If the lightning arrester is damaged due to this, the load cannot be protected from lightning surge.

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

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

  The first means comprises a lightning arrester unit for detecting intrusion of induced lightning in the distribution board, and when the lightning information acquisition means acquires lightning information detected by the lightning arrester unit, the control means is connected to a specific load. The second means configured to shut off the power supply circuit is preferable.

  In the first or second means, it is preferable to use a third means in which the control means is configured to cut off the ground circuit connected to a specific load.

  In the first to third means, an auxiliary power source and switching means provided between the auxiliary power source and a specific load are provided, and when the circuit of the specific load is cut off, the control means controls the switching means. A fourth means for 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, comprising a lightning arrester unit for detecting the intrusion of induced lightning in the distribution board, and when the lightning arrester unit detects the induced lightning, the lightning information of the lightning information acquisition means is output to the server; The fifth means is preferable.

  According to the load protection system of the present invention, by using lightning information of the surrounding area and determining that the lightning is approaching the distribution board, the electric circuit connected to a specific load before the lightning strikes directly Can be cut off. Therefore, it becomes 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 2nd embodiment. It is the schematic of the load protection system of 3rd embodiment. It is the schematic of the load protection system of 4th embodiment.

  The form for implementing this invention is shown below. FIG. 1 is a schematic diagram of a load protection system 1 according to the first embodiment. The load protection system 1 according to the present embodiment includes a lightning information acquisition unit 6 inside a distribution board 4 to which a load is connected. The lightning information acquisition unit 6 is connected to the server 3 via the network 2. It is connected. The lightning information acquisition unit 6 can acquire lightning information from the server 3 via the network 2, and can output lightning information to the server 3 via the network 2.

  The server 3 stores lightning information of 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. It is possible to incorporate various lightning information. This lightning information can acquire information such as the occurrence of lightning strikes in the surrounding area, the distance to the point where the lightning occurred, the frequency of lightning occurrence, etc. as lightning occurrence information.

  In 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. The position specifying means 7 is used to specify a place where the distribution board 4 is installed using GPS (Global Positioning System) or the like. Note that the server 3 may be provided with the position specifying means 7. In this case, the position information of the distribution board 4 input by an external input means is stored in the server 3, and the IP address and MAC address 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 server 3, the position information of the distribution board 4 can be specified.

  The distribution board 4 according to the present embodiment includes a determination unit 8 that determines that lightning is approaching the position where the distribution board 4 is installed. This determination means 8 is used to determine the approach of lightning from the lightning information of the server 3. The determination means 8 may have any determination condition. For example, lightning is approaching when lightning strikes a certain number of times within a certain range (around 10 km) in a certain time (10 minutes). Can be determined.

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

  The load protection system 1 configured as described above uses the lightning information of the surrounding area and determines that the lightning is approaching the distribution board 4, so that the specific load 5 can be detected before the lightning strikes directly. The power supply circuit 51 connected to can be shut off. Therefore, the specific load 5 can be protected from destruction by lightning.

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

  Next, a second embodiment will be described. FIG. 2 is a schematic diagram of the load protection system 1 according to the second embodiment. In the second embodiment, unlike the first embodiment, a lightning arrester unit 13 is provided in the distribution board 4. The lightning arrester protects the load on the distribution board by allowing the induced lightning to escape to the ground, but 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. Note that when the lightning arrester unit 13 detects the intrusion of the induced lightning, a signal may be directly output to the control means 9 and the power supply circuit 51 may be shut off. When the lightning arrester unit 13 detects the induced lightning, the lightning information acquisition means 6 outputs the lightning information to the server 3 via the network 2 and uses the lightning information for protecting 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) to measure the current released to the ground.

  Next, a third embodiment will be described. FIG. 3 is a schematic diagram of the load protection system 1 according to the third embodiment. The third embodiment is different 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 a switching means 17. This switching means 17 can be operated by the control means 9.

  The load protection system 1 according to the present embodiment controls the auxiliary power supply 15 that is not normally connected to the specific load 5 with the specific load 5 when the power supply circuit 51 is shut off. 9 can be operated. Therefore, even if the power supply circuit 51 connected to the specific load 5 is shut off, power can be supplied from the auxiliary power supply 15 to the specific load 5.

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

  As mentioned above, although four embodiment was described, this invention is not limited to the said embodiment, It can be set as various aspects. For example, the lightning information acquisition means, the position specifying means, the determination means, the control means, the lightning arrester unit, etc. may be installed either inside or outside the distribution board.

  Various devices for information transmission may be interposed 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 loads at which the power supply circuit is cut off may be all loads connected to the distribution board or only some important loads.

DESCRIPTION OF SYMBOLS 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 (5)

  Lightning information acquisition means for acquiring lightning information in the surrounding area, position specifying means for specifying the position where the distribution board is installed, and control means capable of shutting off the power supply circuit, the control means, When it is determined that lightning is approaching by the means for determining that lightning is approaching the position where the distribution board is installed, the power supply circuit connected to a specific load is shut off when it is determined that lightning is approaching To control the load protection system.   A lightning arrester unit for detecting the intrusion of induced lightning on the distribution board is provided, and when the lightning information acquisition means acquires lightning information detected by the lightning arrester unit, the control means shuts off the power supply circuit connected to a specific load. The load protection system according to claim 1.   The load protection system according to claim 1, wherein the control unit also cuts off a ground circuit connected to a specific load. Auxiliary power supply, comprising switching means provided between the auxiliary power supply and a specific load,
The control unit supplies power to the specific load from the auxiliary power source by switching the switching unit and connecting the auxiliary power source to the specific load when the circuit of the specific load is cut off. Crab load protection system.   The distribution board is connected to a server via a network, and includes a lightning arrester unit that detects intrusion of induced lightning in the distribution board. When the lightning arrester unit detects induced lightning, it outputs lightning information from a lightning information acquisition means to the server. The load protection system according to any one of claims 2 to 4.

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