Circuit control device

Abstract

The present application provides a circuit control device, comprising: an energy extraction device, a power distribution terminal, a circuit breaker, a first energy storage device, a second energy storage device and a third energy storage device; the power distribution terminal is connected to the energy extraction device and is used for controlling the state of the circuit breaker; the circuit breaker is connected to the power distribution terminal; the first energy storage device and the second energy storage device are respectively connected to the power distribution terminal, and the first energy storage device and the second energy storage device are respectively used for supplying power to the power distribution terminal; the third energy storage device is connected to the circuit breaker and is used for supplying power to the circuit breaker. By using the three energy storage devices in cooperation, the present application can improve the working efficiency and reliability of the circuit control device and enhance the safety of the circuit.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and particularly relates to a circuit control device. Background Art

[0002] In the related art, there is 1 set of backup battery in the circuit control device. When the circuit is operating normally, the backup battery supplies power to the power distribution terminal. When the circuit is powered off, the energy storage device can support the operation of the power distribution terminal for 8 hours. However, when the circuit is powered off for more than 8 hours and then powered on again, at this time the backup battery is in a power-deficient state and needs to be charged before it can supply power to the power distribution terminal. Therefore, the power distribution terminal cannot be put into operation immediately. At this time, if a circuit fault occurs, the power distribution terminal cannot control the circuit to break in time, which is likely to expand the fault and cause safety problems. Summary of the Invention

[0003] An embodiment of the present application provides a circuit control device. By using three energy storage devices in cooperation, the working efficiency and reliability of the circuit control device can be improved, and the safety of the circuit can be enhanced.

[0004] The technical solution of the embodiment of the present application is implemented as follows:

[0005] An embodiment of the present application provides a circuit control device, which includes:

[0006] An energy extraction device, a power distribution terminal, a circuit breaker, a first energy storage device, a second energy storage device, and a third energy storage device; the power distribution terminal is connected to the energy extraction device and is used to control the state of the circuit breaker; the circuit breaker is connected to the power distribution terminal; the first energy storage device and the second energy storage device are respectively connected to the power distribution terminal, and the first energy storage device and the second energy storage device are respectively used to supply power to the power distribution terminal; the third energy storage device is connected to the circuit breaker and is used to supply power to the circuit breaker.

[0007] The above circuit control device further includes:

[0008] A first relay, a second relay, and a third relay; the first relay is connected to the energy extraction device, the second energy storage device, and the power distribution terminal, and the first relay is used to control the energy extraction device to charge or discharge the second energy storage device through the power distribution terminal; the second relay is connected to the energy extraction device, the third energy storage device, and the power distribution terminal, and the second relay is used to control the energy extraction device to charge the third energy storage device through the power distribution terminal; the third relay is connected to the energy extraction device, the third energy storage device, and the circuit breaker, and is used to control the third energy storage device to supply power to the circuit breaker.

[0009] The above circuit control device further includes:

[0010] The first relay includes a first electromagnet and a first switching device; the first electromagnet is connected in series with the energy harvesting device and is used to control the closing or opening of the first switching device; the first switching device is respectively connected in series with the power distribution terminal and the second energy storage device, and when the first switching device is closed, the second energy storage device is charged or discharged through the power distribution terminal.

[0011] The above circuit control device further includes:

[0012] When the input voltage of the energy harvesting device is less than the first voltage threshold, the first electromagnet controls the first switching device to open; when the input voltage is greater than or equal to the first voltage threshold, the first electromagnet controls the first switching device to close, and the energy harvesting device charges the second energy storage device through the power distribution terminal, or the second energy storage device supplies power to the power distribution terminal.

[0013] The above circuit control device further includes:

[0014] When the input voltage is greater than or equal to the first voltage threshold, the first electromagnet controls the first switching device to close, and when the first energy storage device supplies power to the power distribution terminal, the energy harvesting device charges the second energy storage device through the power distribution terminal; when the input voltage is greater than or equal to the first voltage threshold, the first electromagnet controls the first switching device to close, and when the first energy storage device is in a power deficit state, the second energy storage device supplies power to the power distribution terminal.

[0015] The above circuit control device further includes:

[0016] The second relay includes a second electromagnet and a second switching device, and the power distribution terminal is connected to the third energy storage device; the second electromagnet is connected in series with the energy harvesting device and is used to control the closing or opening of the second switching device; the second switching device is respectively connected in series with the power distribution terminal and the third energy storage device, and when the second switching device is closed, the energy harvesting device charges the third energy storage device through the power distribution terminal.

[0017] The above circuit control device further includes:

[0018] When the input voltage of the energy harvesting device is less than the first voltage threshold, the second electromagnet controls the second switching device to open; when the input voltage is greater than or equal to the first voltage threshold, the second electromagnet controls the second switching device to close, and the power distribution terminal charges the third energy storage device.

[0019] The above circuit control device further includes:

[0020] The third relay includes a third electromagnet and a third switching device; the third electromagnet is connected in series with the energy harvesting device and is used to control the closing and opening of the third switching device; the third switching device is connected in series with the circuit breaker and the third energy storage device, and when the third switching device is closed, the third energy storage device supplies power to the circuit breaker.

[0021] The above circuit control device further includes:

[0022] When the input voltage of the energy harvesting device is less than the second voltage threshold, the third electromagnet controls the third switching device to open; when the input voltage is greater than or equal to the second voltage threshold, the third electromagnet controls the third switching device to close, the third energy storage device supplies power to the circuit breaker, and the circuit breaker enters an open state to control the circuit to be disconnected.

[0023] The above circuit control device further includes:

[0024] When the distribution terminal is in the working state and the input voltage of the energy harvesting device is greater than the second voltage threshold, the distribution terminal controls the circuit breaker to enter an open state, and the circuit breaker controls the circuit to be disconnected in the open state; when the distribution terminal is in the working state and the input voltage is less than the second voltage threshold, the distribution terminal controls the circuit breaker to enter a closed state, and the circuit breaker controls the circuit to be connected in the closed state.

[0025] The embodiments of the present application have the following beneficial effects:

[0026] The circuit control device in the embodiments of the present application includes: an energy harvesting device, a distribution terminal, a circuit breaker, a first energy storage device, a second energy storage device, and a third energy storage device. The distribution terminal is connected to the energy harvesting device and is used to control the state of the circuit breaker, and the circuit breaker is connected to the distribution terminal. The first energy storage device and the second energy storage device are respectively connected to the distribution terminal, and the first energy storage device and the second energy storage device are respectively used to supply power to the distribution terminal. In this way, when the first energy storage device is in a power-deficient state and cannot supply power to the distribution terminal, the second energy storage device can supply power to the distribution terminal, enabling the distribution terminal to quickly enter the working state, thereby improving the working efficiency and reliability of the circuit control device. The third energy storage device is connected to the circuit breaker and is used to supply power to the circuit breaker. In this way, when the distribution terminal has not yet entered the working state and an abnormality occurs in the circuit, the third energy storage device can supply power to the circuit breaker, causing the circuit breaker to enter an open state, thereby controlling the circuit to be disconnected and avoiding losses caused by the expansion of the fault. In this way, through the coordinated use of the three energy storage devices in the embodiments of the present application, the working efficiency and reliability of the circuit control device can be improved, and the safety of the circuit can be enhanced. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the circuit structure of the circuit control device provided by an embodiment of the present application;

[0028] Figure 2 It is another schematic diagram of the circuit structure of the circuit control device provided by an embodiment of the present application;

[0029] Figure 3 It is a schematic diagram of the circuit structure of the circuit control device under normal conditions provided by an embodiment of the present application;

[0030] Figure 4 It is a schematic diagram of the circuit structure of the circuit control device in a fault state provided by an embodiment of the present application;

[0031] Figure 5 It is a schematic diagram of the circuit structure of the input line provided by an embodiment of the present application. Detailed implementation manners

[0032] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0033] In the following description, "some embodiments" are involved, which describe a subset of all possible embodiments. However, it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0034] In the following description, the terms "first / second" involved are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second" can be interchanged with a specific order or sequence when permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0035] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs. The terms used in the embodiments of the present application are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0036] Before further elaborating on the embodiments of the present application, the nouns and terms involved in the embodiments of the present application are described. The nouns and terms involved in the embodiments of the present application are applicable to the following explanations.

[0037] 1) Energy acquisition device: A device that can acquire energy from a specific environment and convert it into available electric energy, and is usually used to provide power for various monitoring devices, sensors or remote communication devices.

[0038] 2) Distribution terminal: A distribution terminal refers to the equipment or facilities installed at the end of the distribution network, which is responsible for distributing the electric energy output from the substation to each electrical equipment. It can be a single device or a set of devices, and its design and functions vary according to the application scenarios and requirements.

[0039] 3) Circuit breaker: A switching device that can carry current under normal circuit conditions and automatically disconnect the circuit under abnormal circuit conditions (such as short circuit or overload).

[0040] 4) Energy storage device: A device or system that can store energy and release it when needed.

[0041] 5) Relay: An electrical control device that can control the on / off of the output circuit according to the change of input electrical quantities (such as voltage, current). Essentially, it is an automatic switch used for remote control, circuit protection, etc.

[0042] 6) Main circuit: The main circuit in the embodiments of this application refers to the input line existing between the substation and the electrical equipment, that is, all the circuits between the substation and the electrical equipment.

[0043] 7) Sub-circuit: The sub-circuit in the embodiments of this application refers to the part of the circuit where the circuit control device is located in the input line between the substation and the electrical equipment.

[0044] 8) Discharged state: It refers to the state where the battery power is lower than the normal working level. In the embodiments of this application, when the energy storage device is in the discharged state, it means that the energy storage device cannot supply power to the distribution terminal normally.

[0045] It should be noted that the main circuit and the sub-circuit in the embodiments of this application are relative. Refer to Figure 5 , Figure 5 The circuit A, circuit B, and circuit C in are the main circuits, including all the circuits between the substation and the electrical equipment, which are three-phase power; Figure 5 The other unlabeled circuits in are the sub-circuits, including the part of the circuit where the circuit control device is located.

[0046] In the related art, a set of backup batteries, i.e., an energy storage device, is provided in a circuit control device. When the circuit is operating normally, the energy storage device powers the distribution terminal. When the circuit is powered off, the energy storage device can support the operation of the distribution terminal for 8 hours. However, when the circuit is powered on again after a power outage of more than 8 hours, the energy storage device is in a power-deficient state and cannot power the distribution terminal. The energy storage device needs to be charged before it can power the distribution terminal. Therefore, the distribution terminal cannot be put into operation immediately. At this time, if a circuit fault occurs, the distribution terminal cannot timely control the circuit breaker to enter the open state, which easily expands the fault and causes safety problems. In addition, the distribution terminal requires a startup time when powered on, usually 8 seconds. That is to say, even if the distribution terminal can be powered on immediately, it needs 8 seconds to be put into use. If a circuit fault occurs within these 8 seconds, the distribution terminal also cannot timely control the circuit to disconnect, thereby expanding the fault range and causing safety problems.

[0047] Based on the above problems existing in the related art, the embodiments of the present application provide a circuit control device. When the large circuit is powered on again after a power outage of more than 8 hours and the first energy storage device is in a power-deficient state and cannot power the distribution terminal, the second energy storage device can power the distribution terminal, enabling the distribution terminal to be put into operation and enter the working state as soon as possible, thereby improving the working efficiency and reliability of the circuit control device. The third energy storage device is connected to the circuit breaker and is used to power the circuit breaker. In this way, even if a fault occurs during the 8 seconds when the distribution terminal is powered on and the distribution terminal cannot control the circuit breaker to enter the open state, the third energy storage device can still ensure that the circuit breaker enters the open state, disconnecting the large circuit, thereby improving the safety of the circuit. In this way, through the coordinated use of the three energy storage devices in the embodiments of the present application, the working efficiency and reliability of the circuit control device can be improved, and the safety of the circuit can be enhanced.

[0048] See Figure 1 , Figure 1 FIG. is a schematic circuit structure diagram of the circuit control device provided by the embodiments of the present application. The following will be described in conjunction with Figure 1 the circuit structure shown.

[0049] As shown in Figure 1As shown in the figure, the circuit control device includes: an energy extraction device 101, a power distribution terminal 102, a circuit breaker 103, a first energy storage device 104, a second energy storage device 105, and a third energy storage device 106. Among them, the energy extraction device 101 is used to provide an input voltage for the sub-circuit. The power distribution terminal 102 is connected to the energy extraction device 101 and is used to control the state of the circuit breaker 103 according to the input voltage provided by the energy extraction device 101. The circuit breaker 103 is connected to the power distribution terminal 102 and is used to control the circuit to be turned on or off. The first energy storage device 104 and the second energy storage device 105 are respectively connected to the power distribution terminal 102, and the first energy storage device 104 and the second energy storage device 105 are respectively used to supply power to the power distribution terminal 102. The third energy storage device 106 is connected to the circuit breaker 103 and is used to supply power to the circuit breaker.

[0050] Here, there is an input line between the substation and the electrical equipment. However, the input line is prone to sudden failures. Therefore, multiple circuit control devices need to be installed in the input line. The circuit control devices can control the input line to cut off power through circuit breakers. In this way, if a fault occurs at a certain position in the input line, the circuit breaker in the circuit control device closest to the fault position can be controlled to enter the power-off state, thereby cutting off the power of the entire line and preventing the fault from affecting the line segments in the input line that have not failed. Among them, the large circuit in the embodiments of this application is the input line, that is, all the circuits between the substation and the electrical equipment. The sub-circuit includes the section of the circuit where the circuit control device is located in the input line. The circuit controlled by the circuit breaker 103 can be the large circuit, or include the large circuit and the sub-circuit. The energy extraction device 101 obtains electrical energy from the large circuit and provides an input voltage for the sub-circuit. When the large circuit is operating normally, the energy extraction device 101 outputs alternating current (AC) 220V and sends it to the power distribution terminal 102, and powers the first energy storage device 104 through the battery management unit of the power distribution terminal 102. Since the energy extraction device 101 cannot directly power the power distribution terminal 102, the first energy storage device 104 needs to power the power distribution terminal 102 after storing electricity. Among them, the first energy storage device 104 can power the power distribution terminal 102 after being fully charged, or power the power distribution terminal 102 when the battery level reaches the preset battery level. The preset battery level is determined according to the performance of the first energy storage device 104 and the power distribution terminal 102, that is, the first energy storage device 104 can power the power distribution terminal 102 when the battery level reaches the preset battery level, and the first energy storage device 104 is in a power-deficient state when the battery level is lower than the preset battery level. The power distribution terminal 102 can monitor the state of the large circuit in real time during operation and control the circuit breaker 103 to enter the open state when a fault occurs in the large circuit. Among them, the circuit breaker 103 will automatically open when it detects a fault in the large circuit. However, the circuit breaker 103 needs electrical energy to enter the open state. Therefore, when a fault occurs in the large circuit, the power distribution terminal will provide electrical energy for the circuit breaker 103 to make the circuit breaker 103 enter the open state, thereby cutting off the power of the large circuit. The circuit breaker 103 can be manually reset or automatically reset after the fault is eliminated, thereby restoring the power supply of the large circuit. The first energy storage device 104, the second energy storage device 105, and the third energy storage device 106 are used to store energy and release it when needed, and can be set as batteries. Among them, the stored electricity in the first energy storage device 104, the second energy storage device 105, and the third energy storage device 106 can support the power distribution terminal 102 to continue operating for 8 hours after the large circuit power outage and at least support 1 "open-close-open" operation for the circuit breaker 103. The second energy storage device 105 is used to power on again after the large circuit power outage exceeds 8 hours, and power the power distribution terminal 102 when the first energy storage device is in a power-deficient state and cannot power the power distribution terminal.The third energy storage device 106 is connected to the circuit breaker 103 and is used to supply power to the circuit breaker 103 when the power distribution terminal 102 has not entered the working state and the input voltage is too high, so that the circuit breaker 103 enters the off state and controls the large circuit to disconnect.

[0051] In the embodiment of the present application, the circuit control device includes: an energy taking device, a power distribution terminal, a circuit breaker, a first energy storage device, a second energy storage device, and a third energy storage device. Among them, the energy taking device is used to provide an input voltage for the sub-circuit. The power distribution terminal is connected to the energy taking device and is used to control the state of the circuit breaker according to the input voltage provided by the energy taking device. The circuit breaker is connected to the power distribution terminal and is used to control the large circuit to be switched on or off. The first energy storage device and the second energy storage device are respectively connected to the power distribution terminal. The first energy storage device and the second energy storage device are respectively used to supply power to the power distribution terminal. In this way, when the first energy storage device is in a power-deficient state and cannot supply power to the power distribution terminal, the second energy storage device can supply power to the power distribution terminal, enabling the power distribution terminal to quickly enter the working state, thereby improving the working efficiency and reliability of the circuit control device. The third energy storage device is connected to the circuit breaker and is used to supply power to the circuit breaker. In this way, when the power distribution terminal has not yet entered the working state and the large circuit has an abnormality, the third energy storage device can supply power to the circuit breaker, causing the circuit breaker to enter the off state, thereby controlling the large circuit to disconnect and avoiding losses caused by the expansion of the fault. In this way, through the coordinated use of the three energy storage devices in the embodiment of the present application, the working efficiency and reliability of the circuit control device can be improved, and the safety of the circuit can be enhanced.

[0052] In some embodiments, referring to Figure 2 , the circuit control device further includes: a first relay 107, a second relay 108, and a third relay 109. Among them, the first relay 107 is connected to the energy taking device 101, the second energy storage device 105, and the power distribution terminal 102. The first relay 107 is used to control the energy taking device 101 to charge or discharge the second energy storage device 105 through the power distribution terminal 102. The second relay 108 is connected to the energy taking device 101, the third energy storage device 106, and the power distribution terminal 102. The second relay 108 is used to control the energy taking device 101 to charge the third energy storage device 106 through the power distribution terminal 102. The third relay 109 is connected to the energy taking device 101, the third energy storage device 106, and the circuit breaker 103, and is used to control the third energy storage device 106 to supply power to the circuit breaker 103.

[0053] Here, power supply and discharge correspond to the same process, that is, the energy storage device supplies power to the electrical equipment through discharge. The first relay 107 is connected to the energy extraction device 101, the second energy storage device 105, and the power distribution terminal 102 at the same time, and is used to control the charging or discharging of the second energy storage device 105 according to the input voltage. When the main circuit is operating normally, the first relay 107 controls the second energy storage device 105 to charge; when the main circuit is powered off, the first relay 107 controls the second energy storage device 105 to supply power to the power distribution terminal 102. The second relay 108 is connected to the energy extraction device 101, the third energy storage device 106, and the power distribution terminal 102 at the same time, and is used to control the energy extraction device 101 to charge the third energy storage device 106 through the power distribution terminal 102 according to the input voltage. When the main circuit is operating normally, the second relay 108 controls the third energy storage device 106 to charge. The third relay 109 is connected to the energy extraction device 101, the third energy storage device 106, and the circuit breaker 103 at the same time, and is used to control the third energy storage device 106 to supply power to the circuit breaker 103 when the main circuit fails, so that the circuit breaker 103 enters the off state, thereby controlling the main circuit to power off.

[0054] In the embodiment of the present application, when the main circuit is operating normally, the first relay 107 controls the second energy storage device 105 to charge, and the second relay 108 controls the third energy storage device 106 to charge; when the main circuit is powered off, the first relay 107 controls the second energy storage device 105 to supply power to the power distribution terminal; when the main circuit fails, the third relay 109 controls the third energy storage device 106 to supply power to the circuit breaker 103, so that the circuit breaker 103 enters the off state, thereby controlling the main circuit to power off. In this way, it is possible to charge the second energy storage device 105 and the third energy storage device 106 when the main circuit is operating normally, which is convenient for maintaining the normal operation of the circuit control device through the second energy storage device 105 and the third energy storage device 106 when the main circuit is powered off or fails, and continuing to maintain the line safety, thereby improving the working efficiency and reliability of the circuit control device and ensuring the safety of the circuit.

[0055] In some embodiments, continue to refer to Figure 2 , wherein, the first relay 107 includes: a first electromagnet 71 and a first switch device 72. The first electromagnet 71 is connected in series with the energy extraction device 101 and is used to control the first switch device 72 to close or open. The first switch device 72 is respectively connected in series with the power distribution terminal 102 and the second energy storage device 105. When the first switch device 72 is closed, the second energy storage device 105 is charged or discharged through the power distribution terminal 102.

[0056] Here, the first switching device 72 has an independent armature, and the closing and opening of the first switching device 72 are controlled by the position of the armature. The first electromagnet 71 can convert electrical energy into mechanical energy. When current passes through the coil of the first electromagnet 71, a magnetic field will be generated around it. Through the magnetic field, the armature in the first switching device 72 can be attracted, causing the position of the armature to change, and further controlling the closing or opening of the first switching device 72. The closing of the first switching device 72 can connect the loop between the power distribution terminal 102 and the second energy storage device 105, and then charge or discharge the second energy storage device 105 through the power distribution terminal 102.

[0057] In the embodiment of the present application, the first relay includes a first electromagnet and a first switching device. The first electromagnet automatically controls the closing and opening of the first switching device, thereby realizing the automatic control of charging or discharging the second energy storage device and improving the flexibility of the circuit control device.

[0058] In some embodiments, when the input voltage is less than the first voltage threshold, the first electromagnet 71 controls the first switching device 72 to open, the loop between the second energy storage device 105 and the power distribution terminal 102 is disconnected, and the second energy storage device 105 does not operate; when the input voltage is greater than or equal to the first voltage threshold, the first electromagnet 71 controls the first switching device 72 to close, and the energy extraction device 101 charges the second energy storage device 105 through the power distribution terminal 102, or the second energy storage device 105 supplies power to the power distribution terminal 102.

[0059] Here, the armature in the first switching device 72 is defaultly in the open position. The first voltage threshold can enable the first electromagnet 71 to generate a suction force sufficient to attract the armature in the first switching device 72, causing the armature to be in the closed position. The first voltage threshold is determined according to the normal operating voltage of the large circuit. The first voltage threshold is usually set to about AC150V. When the input voltage is less than the first voltage threshold, it means that the voltage of the large circuit is too low to maintain normal operation. When the input voltage is less than the first voltage threshold, the magnetic force of the first electromagnet 71 is not sufficient to attract the armature to change its position, and the armature is in the default position. At this time, the first switching device 72 is open. When the input voltage is greater than or equal to the first voltage threshold, the magnetic force of the first electromagnet 71 increases, and the armature will change its position under the influence of the magnetic suction force. At this time, the armature controls the first switching device 72 to close. That is to say, when the input voltage is less than the first voltage threshold, the first switching device 72 is open, the loop between the second energy storage device 105 and the power distribution terminal 102 is disconnected, and the second energy storage device 105 does not operate. When the input voltage is greater than or equal to the first voltage threshold, the first switching device 72 is closed, the loop between the second energy storage device 105 and the power distribution terminal 102 is connected, and the energy extraction device 101 charges the second energy storage device 105 through the power distribution terminal 102, or the second energy storage device 105 supplies power to the power distribution terminal 102.

[0060] Among them, when the input voltage is greater than or equal to the first voltage threshold and the first switching device 72 is closed, there are two cases: when the first energy storage device 104 supplies power to the distribution terminal 102, it indicates that the large circuit is operating normally. At this time, the energy taking device 101 charges the second energy storage device 105 through the distribution terminal 102; when the first energy storage device 104 is in a power-deficient state, it indicates that the large circuit has just returned to normal operation from a power-off state and the power-off time is relatively long. At this time, the first energy storage device 104 needs to supply power to the distribution terminal 102 after energy storage. Therefore, the second energy storage device 105 is used to supply power to the distribution terminal.

[0061] In the embodiment of the present application, the first electromagnet in the first relay can control the closing and opening of the first switching device according to the input voltage, so as to control the energy taking device to charge the second energy storage device through the distribution terminal when the large circuit is operating normally; when the large circuit has just returned to normal operation from a power-off state, the second energy storage device is used to supply power to the distribution terminal. In this way, the application of the second energy storage device is flexibly controlled through the first relay, realizing the automatic charging of the second energy storage device, and timely supplying power to the distribution terminal when the first energy storage device is power-deficient, enabling the distribution terminal to be put into operation as soon as possible, improving the working efficiency and reliability of the circuit control device, and enhancing the safety of the circuit.

[0062] In some embodiments, continue to refer to Figure 2 , among which, the second relay 108 includes: a second electromagnet 81 and a second switching device 82, and the distribution terminal 102 is connected to the third energy storage device 106. The second electromagnet 81 is connected in series with the energy taking device 101 and is used to control the closing or opening of the second switching device 82; the second switching device 82 is respectively connected in series with the distribution terminal 102 and the third energy storage device 106. When the second switching device 82 is closed, the energy taking device 101 charges the third energy storage device 106 through the distribution terminal 102.

[0063] Here, the second switching device 82 has an independent armature, and the closing and opening of the second switching device 82 are controlled by the position of the armature. The second electromagnet 81 can convert electrical energy into mechanical energy. When current passes through the coil of the second electromagnet 81, a magnetic field will be generated around it. The magnetic field can attract the armature in the second switching device 82, causing the position of the armature to change, thereby controlling the closing or opening of the second switching device 82. Closing the second switching device 82 can connect the loop between the distribution terminal 102 and the third energy storage device 106, and then enable the energy taking device 101 to charge the third energy storage device 106 through the distribution terminal 102. Disconnecting the second switching device 82 will disconnect the loop between the distribution terminal 102 and the third energy storage device 106, and the third energy storage device 106 stops charging.

[0064] In an embodiment of the present application, the second relay includes a second electromagnet and a second switching device. The second electromagnet automatically controls the closing and opening of the second switching device, thereby achieving automatic control of charging the third energy storage device and improving the flexibility of the circuit control device.

[0065] In some embodiments, when the input voltage is less than the first voltage threshold, the second electromagnet 81 controls the second switching device 82 to open; when the input voltage is greater than or equal to the first voltage threshold, the second electromagnet 81 controls the second switching device 82 to close, and the power distribution terminal 102 charges the third energy storage device 106.

[0066] Here, the armature in the second switching device 82 is default in the open position. The first voltage threshold can enable the second electromagnet 81 to generate a suction force sufficient to attract the armature in the second switching device 82, causing the armature to be in the closed position. As described above, the first voltage threshold is usually set to about AC150V. When the input voltage is less than the first voltage threshold, the magnetic force of the second electromagnet 81 is not sufficient to attract the armature to change its position, and the armature is in the default position. At this time, the second switching device 82 is open. When the input voltage is greater than or equal to the first voltage threshold, the magnetic force of the second electromagnet 81 increases, and the armature will change its position under the influence of the magnetic suction force. At this time, the armature controls the second switching device 82 to close. That is to say, when the input voltage is less than the first voltage threshold, the second switching device 82 is open, the circuit between the third energy storage device 106 and the power distribution terminal 102 is open, and the third energy storage device 106 does not operate. When the input voltage is greater than or equal to the first voltage threshold, the second switching device 82 is closed, the circuit between the third energy storage device 106 and the power distribution terminal 102 is connected, and the energy extraction device 101 charges the third energy storage device 106 through the power distribution terminal 102.

[0067] In an embodiment of the present application, the second electromagnet in the second relay can control the closing and opening of the second switching device according to the input voltage, so as to control the energy extraction device to charge the third energy storage device through the power distribution terminal when the large circuit is operating normally. In this way, automatic charging of the third energy storage device is achieved, thereby improving the flexibility of the circuit control device.

[0068] In some embodiments, continue to refer to Figure 2 , where the third relay 109 includes: a third electromagnet 91 and a third switching device 92. The third electromagnet 91 is connected in series with the energy extraction device 101 and is used to control the closing and opening of the third switching device 92; the third switching device 92 is connected in series with the circuit breaker 103 and the third energy storage device 106. When the third switching device 92 is closed, the third energy storage device 106 supplies power to the circuit breaker 103.

[0069] Here, the third switching device 92 has an independent armature, and the closing and opening of the third switching device 92 are controlled by the position of the armature. The third electromagnet 91 can convert electrical energy into mechanical energy. When current passes through the coil of the third electromagnet 91, a magnetic field will be generated around it. Through the magnetic field, the armature in the third switching device 92 can be attracted, causing the position of the armature to change, thereby controlling the closing or opening of the third switching device 92. The closing of the third switching device 92 can connect the circuit between the circuit breaker 103 and the third energy storage device 106, and then the third energy storage device 106 supplies power to the circuit breaker 103. When the third switching device 92 is opened, the circuit between the circuit breaker 103 and the third energy storage device 106 is disconnected, and the third energy storage device 106 stops supplying power to the circuit breaker 103.

[0070] In the embodiment of the present application, the third relay includes a third electromagnet and a third switching device. The third electromagnet automatically controls the closing and opening of the third switching device, thereby realizing automatic control of the third energy storage device to supply power to the circuit breaker. In this way, when the distribution terminal has not entered the working state but an abnormality occurs in the large circuit, the third energy storage device can provide the electrical energy required for the circuit breaker to enter the open state, thereby controlling the large circuit to be disconnected and improving the safety of the circuit.

[0071] In some embodiments, when the input voltage is less than the second voltage threshold, the third electromagnet 91 controls the third switching device 92 to open; when the input voltage is greater than or equal to the second voltage threshold, the third electromagnet 91 controls the third switching device 92 to close, the third energy storage device 106 supplies power to the circuit breaker 103, and the circuit breaker 103 enters the open state to control the large circuit to be disconnected.

[0072] Here, the armature in the third switching device 92 is defaultly in the open position. The second voltage threshold can enable the third electromagnet 91 to generate a suction force sufficient to attract the armature in the third switching device 92, causing the armature to be in the closed position. The second voltage threshold is determined based on the fault voltage of the large circuit. When the input voltage is greater than the second voltage threshold, it indicates that the voltage of the large circuit is too high and is in a fault state. The second voltage threshold is different from the first voltage threshold and is usually set to about AC240V. When the input voltage is less than the second voltage threshold, the magnetic force of the third electromagnet 91 is not sufficient to attract the armature to change its position, and the armature is in the default position. At this time, the third switching device 92 is open. When the input voltage is greater than or equal to the second voltage threshold, the magnetic force of the third electromagnet 91 increases, and the armature will change its position under the influence of the magnetic suction force. At this time, the armature controls the third switching device 92 to close. That is to say, when the input voltage is less than the second voltage threshold, the third switching device 92 is open, and the circuit between the third energy storage device 106 and the circuit breaker 103 is open, and the third energy storage device 106 does not supply power to the circuit breaker 103. When the input voltage is greater than or equal to the second voltage threshold, the third switching device 92 is closed, and the circuit between the third energy storage device 106 and the circuit breaker 103 is connected, and the third energy storage device 106 supplies power to the circuit breaker 103, causing the circuit breaker to enter the open state, thereby controlling the large circuit to be disconnected.

[0073] In the embodiment of the present application, the third electromagnet in the third relay can control the closing and opening of the third switching device according to the input voltage, so that when the voltage of the large circuit is too high due to a fault, the electric energy required for the circuit breaker to enter the open state can be provided. In this way, even if a fault occurs before the power distribution terminal is put into operation, the circuit breaker can still be ensured to enter the open state normally through the third energy storage device, thereby controlling the large circuit to be disconnected and improving the safety of the circuit.

[0074] In some embodiments, when the power distribution terminal 102 is in the working state and the input voltage is greater than the second voltage threshold, the power distribution terminal 102 controls the circuit breaker 103 to enter the open state, and the circuit breaker 103 controls the large circuit to be disconnected in the open state; when the power distribution terminal 102 is in the working state and the input voltage is less than the second voltage threshold, the power distribution terminal 102 controls the circuit breaker 103 to enter the closed state, and the circuit breaker 103 controls the large circuit to be connected in the closed state.

[0075] Here, when the power distribution terminal 102 is in a normal working state, it can control the switching state of the circuit breaker. When the input voltage is greater than the second voltage threshold, it indicates that the large circuit voltage is too high. The power distribution terminal 102 controls the circuit breaker 103 to enter the open state, and the circuit breaker 103 controls the circuit to be disconnected in the open state. When the input voltage is less than the second voltage threshold, the power distribution terminal 102 controls the circuit breaker 103 to enter the closed state, and the circuit breaker 103 controls the circuit to be connected in the closed state. Among them, the circuit controlled by the circuit breaker 103 can be a large circuit, or include a large circuit and sub - circuits. In this way, the power distribution terminal monitors the state of the large circuit in real - time, and realizes the control and protection of the large circuit by controlling the circuit breaker, thereby improving the working efficiency and reliability of the circuit control device and enhancing the safety of the circuit.

[0076] Optionally, the power distribution terminal 102 further includes a battery management unit. The energy - taking device 101 is connected to the battery management unit, and at the same time, the battery management unit is also respectively connected to the first energy storage device 104, the second energy storage device 105, and the third energy storage device 106. In this way, the charging and discharging of the first energy storage device 104, the second energy storage device 105, and the third energy storage device 106 can be controlled through the battery management unit.

[0077] Next, the exemplary application of the embodiments of the present application in an actual application scenario will be described. Among them, taking the first voltage threshold set to AC150V and the second voltage threshold set to 240V as an example for illustration.

[0078] See Figure 3 , Figure 3 is a schematic circuit structure diagram of the circuit control device in the normal state provided by the embodiments of the present application. When the large circuit is operating normally, the input voltage is AC220V. At this time, the first switching device 72 in the first relay 107 is closed, the second switching device 82 in the second relay 108 is closed, and the third switching device 92 in the third relay 109 is open. As Figure 3 shown, the following loops are included in the circuit:

[0079] A loop is formed among the energy - taking device 101, the power distribution terminal 102, and the first energy storage device 104. The energy - taking device 101 charges the first energy storage device 104 through the battery management system of the power distribution terminal 102, and supplies power to the power distribution terminal 102 through the first energy storage device 104;

[0080] A loop is formed between the energy - taking device 101 and the first electromagnet 71. The first electromagnet 71 generates magnetic suction to control the first switching device 72 to close;

[0081] A circuit is formed among the energy extraction device 101, the power distribution terminal 102, the second energy storage device 105, and the first switching device 72. The energy extraction device 101 charges the second energy storage device 105 through the battery management system of the power distribution terminal 102. Among them, if the large circuit resumes normal operation after a power outage for 8 hours, the first energy storage device 104 is in a power-deficient state and cannot supply power to the power distribution terminal 102, and the second energy storage device 105 will supply power to the power distribution terminal 102.

[0082] A circuit is formed between the energy extraction device 101 and the second electromagnet 81. The second electromagnet 81 generates a magnetic suction force to control the second switching device 82 to close.

[0083] A circuit is formed among the energy extraction device 101, the power distribution terminal 102, the third energy storage device 106, and the second switching device 82. The energy extraction device 101 charges the third energy storage device 106 through the battery management system of the power distribution terminal 102.

[0084] Continue to refer to Figure 2 , Figure 2 It can also be regarded as a circuit structure diagram of the circuit control device in a power-off state. When the large circuit is powered off, the energy extraction device 101 has no output, that is, the input voltage is 0V. At this time, the first switching device 72 in the first relay 107 is disconnected, the second switching device 82 in the second relay 108 is disconnected, and the third switching device 92 in the third relay 109 is disconnected. Therefore, within 8 hours after the power outage, a circuit is formed between the first energy storage device 104 and the power distribution terminal 102, and the first energy storage device 104 supplies power to the power distribution terminal 102. After the power outage exceeds 8 hours, the first energy storage device 104 runs out of power and enters a power-deficient state.

[0085] Refer to Figure 4 , Figure 4 It is a circuit structure diagram of the circuit control device in a fault state provided by an embodiment of the present application. When the large circuit resumes connection after a power outage of more than 8 hours, the power distribution terminal 102 needs 8 seconds to restart. During this period, the large circuit may malfunction, resulting in an excessive input voltage, reaching AC270V. At this time, the first switching device 72 in the first relay 107 is closed, the second switching device 82 in the second relay 108 is closed, and the third switching device 92 in the third relay 109 is closed. Therefore, a circuit will be formed between the third energy storage device 106 and the circuit breaker 103, and the circuit breaker 103 is supplied with power through the third energy storage device 106 to make the circuit breaker enter the open state, thereby controlling the large circuit to disconnect.

[0086] In the embodiment of the present application, the first energy storage device is put into long-term operation, charges and powers the distribution terminal when the large circuit operates normally without failure, and automatically switches in when the large circuit fails and power is cut off, maintaining the power-off operation of the distribution terminal. A first relay is installed between the second energy storage device and the distribution terminal. When the large circuit operates normally, the first switching device in the first relay closes, and the second energy storage device charges. When the large circuit is disconnected and power is cut off, the first switching device in the first relay opens, and the second energy storage device can exit in a fully charged state. At this time, the first energy storage device powers the distribution terminal. When the large circuit loses power for a long time and is reconnected, the first energy storage device is in a power-deficient state after a long period of power supply and cannot support the operation of the distribution terminal. The first switching device of the first relay closes, and the second energy storage device can supply power for the distribution terminal to be put into operation, thereby improving the switching-in rate of the distribution terminal. A second relay is installed between the third energy storage device and the distribution terminal. When the large circuit is connected, the second switching device of the second relay closes, and the third energy storage device charges. When the large circuit is disconnected and reconnected after more than 8 hours, the distribution terminal requires 8 s to start up. If a fault occurs in the large circuit at this time, the distribution terminal cannot effectively perform fault detection and fault response. Therefore, in the embodiment of the present application, a third relay is installed between the third energy storage device and the circuit breaker. When the voltage of the large circuit is too high (for example, the input voltage is AC242V, indicating that a fault has occurred in the large circuit at this time), the third switching device in the third relay closes, and the third energy storage device is put into operation and controls the circuit breaker to enter the off state, thereby ensuring the safety of other devices in the large circuit.

[0087] In summary, the embodiment of the present application provides a circuit control device. When the large circuit is powered on again after a power outage of more than 8 hours and the first energy storage device is in a power-deficient state and cannot power the distribution terminal, the second energy storage device can power the distribution terminal, enabling the distribution terminal to be put into operation and enter the working state as soon as possible, thereby improving the working efficiency and reliability of the circuit control device. The third energy storage device is connected to the circuit breaker and used to power the circuit breaker. In this way, even if a fault occurs during the 8 s when the distribution terminal starts up and the distribution terminal cannot control the circuit breaker to enter the off state, the third energy storage device can still ensure that the circuit breaker enters the off state and disconnects the large circuit, thereby improving the safety of the circuit. In this way, through the coordinated use of the three energy storage devices in the embodiment of the present application, the working efficiency and reliability of the circuit control device can be improved, and the safety of the circuit can be enhanced.

[0088] The above is only the embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present application are included in the protection scope of the present application.

Claims

1. A circuit control device, characterized in that, The device includes: an energy-taking device, a power distribution terminal, a circuit breaker, a first energy storage device, a second energy storage device, a third energy storage device, and a third relay; The power distribution terminal is connected to the energy-taking device and is used to control the state of the circuit breaker; The circuit breaker is connected to the power distribution terminal; The first energy storage device and the second energy storage device are respectively connected to the power distribution terminal, and the first energy storage device and the second energy storage device are respectively used to supply power to the power distribution terminal; The third energy storage device is connected to the circuit breaker and is used to supply power to the circuit breaker; The third relay is connected to the energy-taking device, the third energy storage device, and the circuit breaker. The third relay is used to control the third energy storage device to supply power to the circuit breaker; the third relay includes a third electromagnet and a third switch device; the third electromagnet is connected in series with the energy-taking device and is used to control the closing and opening of the third switch device; the third switch device is connected in series with the circuit breaker and the third energy storage device; when the input voltage of the energy-taking device is less than the second voltage threshold, the third electromagnet controls the third switch device to open; when the input voltage is greater than or equal to the second voltage threshold, the third electromagnet controls the third switch device to close, the third energy storage device supplies power to the circuit breaker, and the circuit breaker enters the open state to control the circuit to be disconnected.

2. The circuit control device according to claim 1, wherein The device further includes: a first relay, a second relay; The first relay is connected to the energy-taking device, the second energy storage device, and the power distribution terminal, and the first relay is used to control the energy-taking device to charge or discharge the second energy storage device through the power distribution terminal; The second relay is connected to the energy-taking device, the third energy storage device, and the power distribution terminal, and the second relay is used to control the energy-taking device to charge the third energy storage device through the power distribution terminal.

3. The circuit control device according to claim 2, characterized in that The first relay includes a first electromagnet and a first switch device; The first electromagnet is connected in series with the energy-taking device and is used to control the closing or opening of the first switch device; The first switch device is respectively connected in series with the power distribution terminal and the second energy storage device. When the first switch device is closed, the second energy storage device is charged or discharged through the power distribution terminal.

4. The circuit control device according to claim 3, wherein when the input voltage of the energy-taking device is less than the first voltage threshold, the first electromagnet controls the first switch device to open; when the input voltage is greater than or equal to the first voltage threshold, the first electromagnet controls the first switch device to close, and the energy-taking device charges the second energy storage device through the power distribution terminal, or the second energy storage device supplies power to the power distribution terminal.

5. The circuit control device according to claim 4, wherein When the input voltage is greater than or equal to the first voltage threshold, the first electromagnet controls the first switching device to close, and when the first energy storage device supplies power to the power distribution terminal, the energy harvesting device charges the second energy storage device through the power distribution terminal; When the input voltage is greater than or equal to the first voltage threshold, the first electromagnet controls the first switching device to close, and when the first energy storage device is in a power deficit state, the second energy storage device supplies power to the power distribution terminal.

6. The circuit control device according to claim 2, characterized in that, The second relay includes a second electromagnet and a second switching device, and the power distribution terminal is connected to the third energy storage device; The second electromagnet is connected in series with the energy harvesting device and is used to control the second switching device to close or open; The second switching device is connected in series with the power distribution terminal and the third energy storage device respectively. When the second switching device is closed, the energy harvesting device charges the third energy storage device through the power distribution terminal.

7. The circuit control device according to claim 6, wherein When the input voltage of the energy harvesting device is less than the first voltage threshold, the second electromagnet controls the second switching device to open; When the input voltage is greater than or equal to the first voltage threshold, the second electromagnet controls the second switching device to close, and the power distribution terminal charges the third energy storage device.

8. The circuit control device according to any one of claims 1 to 7, wherein When the power distribution terminal is in a working state and the input voltage of the energy harvesting device is greater than the second voltage threshold, the power distribution terminal controls the circuit breaker to enter an open state, and the circuit breaker controls the circuit to open in the open state; When the power distribution terminal is in a working state and the input voltage is less than the second voltage threshold, the power distribution terminal controls the circuit breaker to enter a closed state, and the circuit breaker controls the circuit to be connected in the closed state.

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