Circuit control device

Abstract

The invention provides a circuit control device. The circuit control device comprises 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, the power distribution terminal is connected with the energy taking device and used for controlling the state of the circuit breaker; the circuit breaker is connected with the power distribution terminal; the first energy storage device and the second energy storage device are respectively connected with 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; and the third energy storage device is connected with the circuit breaker and is used for supplying power to the circuit breaker. Through cooperative use of the three energy storage devices, the working efficiency and reliability of the circuit control device can be improved, and the safety of the circuit is improved.

Description

Technical Field

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

[0002] In the related art, a set of backup batteries is provided in the circuit control device. When the circuit is operating normally, the backup battery supplies power to the distribution terminal. When the circuit is out of power, the energy storage device can support the operation of the distribution terminal for 8 hours. However, when the power is restored after the circuit is out of power for more than 8 hours, the backup battery is in a low-power state. The distribution terminal can only be powered after the backup battery is charged, so the distribution terminal cannot be put into operation immediately. At this time, if a circuit failure occurs, the distribution terminal cannot control the circuit disconnection in time, which is easy to expand the failure and cause safety problems. Summary of the invention

[0003] The embodiment of the present application provides a circuit control device, which can improve the working efficiency and reliability of the circuit control device and improve the safety of the circuit by using three energy storage devices in combination.

[0004] The technical solution of the embodiment of the present application is implemented as follows: An embodiment of the present application provides a circuit control device, the device comprising: An energy collection 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 collection 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.

[0005] The circuit control device further comprises: a first relay, a second relay and a third relay; the first relay is connected to the energy acquisition device, the second energy storage device is connected to the power distribution terminal, and the first relay is used to control the energy acquisition device to charge or discharge the second energy storage device through the power distribution terminal; the second relay is connected to the energy acquisition device, the third energy storage device is connected to the power distribution terminal, and the second relay is used to control the energy acquisition device to charge the third energy storage device through the power distribution terminal; the third relay is connected to the energy acquisition 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.

[0006] The circuit control device further comprises: The first relay includes a first electromagnet and a first switching device; the first electromagnet is connected in series with the energy taking device to control the first switching device to close or open; the first switching device is connected in series with the power distribution terminal and the second energy storage device respectively, and when the first switching device is closed, the second energy storage device is charged or discharged through the power distribution terminal.

[0007] The circuit control device further comprises: When the input voltage of the energy acquisition device is less than a first voltage threshold, the first electromagnet controls the first switch device to be disconnected; when the input voltage is greater than or equal to the first voltage threshold, the first electromagnet controls the first switch device to be closed, and the energy acquisition 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.

[0008] The circuit control device further comprises: 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 first energy storage device supplies power to the power distribution terminal, the energy acquisition 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 switch device to close, and the first energy storage device is in a power-deficient state, the second energy storage device supplies power to the power distribution terminal.

[0009] The circuit control device further comprises: 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 extraction device 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, and when the second switching device is closed, the energy extraction device charges the third energy storage device through the power distribution terminal.

[0010] The circuit control device further comprises: When the input voltage of the energy acquisition device is less than a first voltage threshold, the second electromagnet controls the second switch device to be disconnected; when the input voltage is greater than or equal to the first voltage threshold, the second electromagnet controls the second switch device to be closed, and the power distribution terminal charges the third energy storage device.

[0011] The circuit control device further comprises: The third relay includes a third electromagnet and a third switching device; the third electromagnet is connected in series with the energy extraction device 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.

[0012] The circuit control device further comprises: When the input voltage of the energy extraction device is less than the second voltage threshold, the third electromagnet controls the third switch device to be disconnected; when the input voltage is greater than or equal to the second voltage threshold, the third electromagnet controls the third switch device to be closed, the third energy storage device supplies power to the circuit breaker, the circuit breaker enters the disconnected state, and controls the circuit to be disconnected.

[0013] The circuit control device further comprises: When the power distribution terminal is in a working state and the input voltage of the energy acquisition device is greater than a second voltage threshold, the power 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 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.

[0014] The embodiments of the present application have the following beneficial effects: The circuit control device of the embodiment of the present application 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. The power distribution terminal is connected to the energy taking device for controlling the state of the circuit breaker, and 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 power the power distribution terminal. In this way, when the first energy storage device is in a power-deficient state and cannot power the power distribution terminal, the second energy storage device can be used to power the power distribution terminal, so that the power distribution terminal can be put into 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 for powering the circuit breaker. In this way, when the power distribution terminal has not been put into working state and an abnormality occurs in the circuit, the third energy storage device can be used to power the circuit breaker, so that the circuit breaker enters the disconnected state, thereby controlling the circuit to be disconnected, and avoiding the expansion of the fault and causing losses. In this way, the embodiment of the present application can improve the working efficiency and reliability of the circuit control device and improve the safety of the circuit by using three energy storage devices in combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the circuit structure of a circuit control device provided in an embodiment of the present application; Figure 2 is another circuit structure schematic diagram of the circuit control device provided in an embodiment of the present application; Figure 3 is a schematic diagram of the circuit structure of a circuit control device in a normal state provided by an embodiment of the present application; Figure 4 It is a schematic diagram of the circuit structure of a circuit control device in a fault state provided by an embodiment of the present application; Figure 5 It is a schematic diagram of the circuit structure of the input circuit provided in the embodiment of the present application. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0017] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0018] In the following description, the terms "first\second" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0019] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meanings as those commonly understood by those skilled in the art. 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.

[0020] Before further describing the embodiments of the present application in detail, the nouns and terms involved in the embodiments of the present application are explained. The nouns and terms involved in the embodiments of the present application are subject to the following interpretations.

[0021] 1) Energy harvesting device: A device that can harvest energy from a specific environment and convert it into usable electrical energy, usually used to provide power for various monitoring equipment, sensors or remote communication equipment.

[0022] 2) Distribution terminal: 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 by the substation to various power-consuming devices. It can be a single device or a collection of devices. Its design and function vary according to the application scenario and requirements.

[0023] 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).

[0024] 4) Energy storage device: A device or system that can store energy and release it when needed.

[0025] 5) Relay: An electrical control device that can control the on and off of the output circuit according to changes in input electrical quantity (such as voltage, current). It is essentially an automatic switch used for remote control, circuit protection, etc.

[0026] 6) Large circuit: The large circuit in the embodiment of the present application refers to the input line between the substation and the power-consuming equipment, that is, all circuits between the substation and the power-consuming equipment.

[0027] 7) Sub-circuit: The sub-circuit in the embodiment of the present application refers to the part of the circuit where the circuit control device is located in the input line between the substation and the power-consuming equipment.

[0028] 8) Low-power state: refers to the state where the battery power is lower than the normal working level. In the embodiment of the present application, the low-power state of the energy storage device means that the energy storage device cannot normally supply power to the power distribution terminal.

[0029] It should be noted that the large circuit and sub-circuit in the embodiments of the present application are relative. Figure 5 , Figure 5 Circuit A, Circuit B and Circuit C are large circuits, including all circuits between the substation and the power-consuming equipment, and are three-phase electricity; Figure 5 Other unidentified circuits are subcircuits, including the part of the circuit where the circuit control device is located.

[0030] In the related art, a group of backup batteries, that is, an energy storage device, is provided in the circuit control device. When the circuit is operating normally, the energy storage device supplies power to the distribution terminal. When the circuit is out of power, the energy storage device can support the operation of the distribution terminal for 8 hours. However, when the power is restored after the circuit is out of power for more than 8 hours, the energy storage device is in a power-deficient state and cannot supply power to the distribution terminal. The energy storage device needs to be charged before it can supply power to the distribution terminal, so the distribution terminal cannot be put into operation immediately. At this time, if a circuit fails, the distribution terminal cannot control the circuit breaker to enter the disconnected state in time, which is easy to expand the fault and cause safety problems. In addition, the distribution terminal requires a startup time when it is turned on, which is usually 8 seconds. In other words, even if the distribution terminal can be powered on immediately, the distribution terminal needs to be put into use after 8 seconds. If the circuit fails within these 8 seconds, the distribution terminal cannot control the circuit to disconnect in time, thereby expanding the scope of the fault and causing safety problems.

[0031] Based on the above-mentioned problems existing in the related art, an embodiment of the present application provides a circuit control device. When the power is turned on again after the large circuit has been powered off for more than 8 hours, and 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 be used to supply power to the distribution terminal, so that the distribution terminal can 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 supply power to the circuit breaker. In this way, even if a fault occurs during the 8-second process of starting the distribution terminal, the distribution terminal cannot control the circuit breaker to enter the disconnected state, and the third energy storage device can be used to ensure that the circuit breaker enters the disconnected state, so that the large circuit is disconnected, thereby improving the safety of the circuit. In this way, the embodiment of the present application can improve the working efficiency and reliability of the circuit control device and improve the safety of the circuit by using three energy storage devices in combination.

[0032] See also Figure 1 , Figure 1 This is a schematic diagram of the circuit structure of the circuit control device provided in the embodiment of the present application. Figure 1 The circuit structure shown is explained.

[0033] like Figure 1As shown, the circuit control device includes: an energy acquisition 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 acquisition device 101 is used to provide an input voltage for the subcircuit. The power distribution terminal 102 is connected to the energy acquisition device 101, and is used to control the state of the circuit breaker 103 according to the input voltage provided by the energy acquisition device 101. The circuit breaker 103 is connected to the power distribution terminal 102 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.

[0034] Here, there is an input line between the substation and the power-consuming equipment, but the input line is prone to sudden failure, so it is necessary to set up multiple circuit control devices in the input line, and the circuit control device can control the input line to be powered off through a circuit breaker. In this way, if a fault occurs at a certain position of the input line, the circuit breaker in the circuit control device closest to the fault position can be controlled to enter a power-off state, thereby powering off the entire line and preventing the fault from affecting the line section in the input line that did not originally fail. Among them, the large circuit in the embodiment of the present application is the input line, that is, all circuits between the substation and the power-consuming equipment, and 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 a large circuit, or include a large circuit and a 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 the battery management unit of the power distribution terminal 102 supplies power to the first energy storage device 104. Since the energy acquisition device 101 cannot directly supply power to the distribution terminal 102, the first energy storage device 104 is required to supply power to the distribution terminal 102 after storing power. Among them, the first energy storage device 104 can supply power to the distribution terminal 102 after being fully charged, or supply power to the distribution terminal 102 when the power reaches a preset power. The preset power is determined according to the performance of the first energy storage device 104 and the distribution terminal 102, that is, the first energy storage device 104 can supply power to the distribution terminal 102 when the power reaches a preset power, and the first energy storage device 104 is in a power-deficient state when the power is lower than the preset power. The distribution terminal 102 can monitor the state of the large circuit in real time when it is in working state, and control the circuit breaker 103 to enter the disconnected state when a fault occurs in the large circuit. Among them, the circuit breaker 103 will automatically disconnect when a fault in the large circuit is detected, but the circuit breaker 103 needs electric energy to enter the disconnected state, so when a fault occurs in the large circuit, the distribution terminal will provide electric energy to the circuit breaker 103, so that the circuit breaker 103 enters the disconnected state, thereby disconnecting the large circuit. The circuit breaker 103 can be manually reset or automatically reset after troubleshooting, 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 a battery. Among them, the power stored in the first energy storage device 104, the second energy storage device 105 and the third energy storage device 106 can support the distribution terminal 102 to continue to operate for 8 hours after the large circuit is out of power, and at least support the completion of 1 "disconnect-close-disconnect" operation for the circuit breaker 103. The second energy storage device 105 is used to re-energize after the large circuit is out of power for more than 8 hours, and when the first energy storage device is in a power-deficient state and cannot supply power to the distribution terminal, it supplies power to the 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 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 disconnected state and controls the large circuit to be disconnected.

[0035] In an 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 input voltage for the subcircuit, 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, and the circuit breaker is connected to the power distribution terminal to control the large circuit to be connected or disconnected. 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. 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 be used to supply power to the power distribution terminal, so that the power distribution terminal can be put into 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 supply power to the circuit breaker. In this way, when the power distribution terminal has not been put into working state and an abnormality occurs in the large circuit, the third energy storage device can be used to supply power to the circuit breaker, so that the circuit breaker enters the disconnected state, thereby controlling the disconnection of the large circuit to avoid losses caused by the expansion of the fault. In this way, the embodiment of the present application can improve the working efficiency and reliability of the circuit control device and improve the safety of the circuit by using three energy storage devices in combination.

[0036] In some embodiments, see Figure 2 , the circuit control device also 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 acquisition device 101, the second energy storage device 105 is connected to the power distribution terminal 102, and the first relay 107 is used to control the energy acquisition 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 acquisition device 101, the third energy storage device 106 is connected to the power distribution terminal 102, and the second relay 108 is used to control the energy acquisition 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 acquisition 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.

[0037] Here, power supply and discharge correspond to the same process, that is, the energy storage device supplies power to the electrical equipment by discharging. 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 large circuit is operating normally, the first relay 107 controls the charging of the second energy storage device 105; when the large 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, and the third energy storage device 106 is connected to 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 large circuit is operating normally, the second relay 108 controls the charging of the third energy storage device 106. The third relay 109 is connected to the energy taking 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 a large circuit fails, so that the circuit breaker 103 enters the disconnected state, thereby controlling the large circuit to be powered off.

[0038] In the embodiment of the present application, when the large circuit is operating normally, the first relay 107 controls the charging of the second energy storage device 105, and the second relay 108 controls the charging of the third energy storage device 106; when the large 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 large 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 disconnected state, and then controls the power outage of the large circuit. In this way, the second energy storage device 105 and the third energy storage device 106 can be charged when the large circuit is operating normally, so that when the large circuit is powered off or fails, the second energy storage device 105 and the third energy storage device 106 can be used to maintain the normal operation of the circuit control device and continue to maintain the safety of the line, thereby improving the working efficiency and reliability of the circuit control device and ensuring the safety of the circuit.

[0039] In some embodiments, see 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 to control the first switch device 72 to be closed or opened. The first switch device 72 is connected in series with the power distribution terminal 102 and the second energy storage device 105 respectively. When the first switch device 72 is closed, the second energy storage device 105 is charged or discharged through the power distribution terminal 102.

[0040] Here, the first switch device 72 has an independent armature, and the closing and opening of the first switch 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 is generated around it, which can attract the armature in the first switch device 72, causing the position of the armature to change, thereby controlling the closing or opening of the first switch device 72. The closing of the first switch device 72 can connect the circuit between the power distribution terminal 102 and the second energy storage device 105, thereby charging or discharging the second energy storage device 105 through the power distribution terminal 102.

[0041] In an 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 automatic control of charging or discharging the second energy storage device, thereby improving the flexibility of the circuit control device.

[0042] 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 be disconnected, the circuit between the second energy storage device 105 and the power distribution terminal 102 is disconnected, and the second energy storage device 105 is not put into operation; 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 be closed, 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.

[0043] Here, the armature in the first switch device 72 is in the disconnected position by default, and the first voltage threshold value can make the first electromagnet 71 generate enough suction force to attract the armature in the first switch device 72, so that the armature is in the closed position. The first voltage threshold value is determined according to the normal operating voltage of the large circuit. The first voltage threshold value is usually set to about AC150V. When the input voltage is less than the first voltage threshold value, 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 value, the magnetic force of the first electromagnet 71 is not enough to attract the armature to change its position, and the armature is in the default position. At this time, the first switch device 72 is disconnected. When the input voltage is greater than or equal to the first voltage threshold value, the magnetic force of the first electromagnet 71 is enhanced, and the armature will change its position under the influence of the magnetic attraction force. At this time, the armature controls the first switch device 72 to close. That is to say, when the input voltage is less than the first voltage threshold value, the first switch device 72 is disconnected, the circuit between the second energy storage device 105 and the power distribution terminal 102 is disconnected, and the second energy storage device 105 is not put into operation. When the input voltage is greater than or equal to the first voltage threshold, the first switch 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.

[0044] Among them, when the input voltage is greater than or equal to the first voltage threshold, when the first switch device 72 is closed, there are two situations: 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 acquisition 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 resumed 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 store energy before it can supply power to the distribution terminal 102, so the distribution terminal is powered by the second energy storage device 105.

[0045] In the embodiment of the present application, the first electromagnet in the first relay can control the closing and opening of the first switch device according to the input voltage, so as to control the energy taking device to charge the second energy storage device through the power distribution terminal when the large circuit is operating normally; when the large circuit just resumes normal operation from the power-off state, the power distribution terminal is powered by the second energy storage device. In this way, the application of the second energy storage device is flexibly controlled by the first relay, the automatic charging of the second energy storage device is realized, and the power distribution terminal is powered in time when the first energy storage device is low on power, so that the power distribution terminal can be put into operation as soon as possible, the working efficiency and reliability of the circuit control device are improved, and the safety of the circuit is improved.

[0046] In some embodiments, see Figure 2 , wherein the second relay 108 includes: a second electromagnet 81 and a second switch device 82, and the power distribution terminal 102 is connected to the third energy storage device 106. The second electromagnet 81 is connected in series with the energy extraction device 101 to control the second switch device 82 to be closed or opened; the second switch device 82 is connected in series with the power distribution terminal 102 and the third energy storage device 106 respectively, and when the second switch device 82 is closed, the energy extraction device 101 charges the third energy storage device 106 through the power distribution terminal 102.

[0047] Here, the second switch device 82 has an independent armature, and the closing and opening of the second switch device 82 are controlled by the position of the armature. The second electromagnet 81 can convert electrical energy into mechanical energy. When the current passes through the coil of the second electromagnet 81, a magnetic field is generated around it. The magnetic field can attract the armature in the second switch device 82, so that the position of the armature changes, thereby controlling the closing or opening of the second switch device 82. The closing of the second switch device 82 can connect the circuit between the power distribution terminal 102 and the third energy storage device 106, so that the energy extraction device 101 charges the third energy storage device 106 through the power distribution terminal 102. When the second switch device 82 is disconnected, the circuit between the power distribution terminal 102 and the third energy storage device 106 is disconnected, and the third energy storage device 106 stops charging.

[0048] In an embodiment of the present application, the second relay includes a second electromagnet and a second switch device. The second electromagnet automatically controls the closing and opening of the second switch device, thereby realizing automatic control of charging the third energy storage device, thereby improving the flexibility of the circuit control device.

[0049] In some embodiments, when the input voltage is less than the first voltage threshold, the second electromagnet 81 controls the second switch device 82 to be disconnected; when the input voltage is greater than or equal to the first voltage threshold, the second electromagnet 81 controls the second switch device 82 to be closed, and the power distribution terminal 102 charges the third energy storage device 106.

[0050] Here, the armature in the second switch device 82 is in the disconnected position by default, and the first voltage threshold value can make the second electromagnet 81 generate enough suction force to attract the armature in the second switch device 82, so that the armature is in the closed position. As mentioned above, the first voltage threshold value is usually set to about AC150V. When the input voltage is less than the first voltage threshold value, the magnetic force of the second electromagnet 81 is not enough to attract the armature to change its position, and the armature is in the default position, at which time the second switch device 82 is disconnected. When the input voltage is greater than or equal to the first voltage threshold value, the magnetic force of the second electromagnet 81 is enhanced, and the armature will change its position under the influence of the magnetic attraction force, and at this time the armature controls the second switch device 82 to close. In other words, when the input voltage is less than the first voltage threshold value, the second switch device 82 is disconnected, the circuit between the third energy storage device 106 and the power distribution terminal 102 is disconnected, and the third energy storage device 106 is not put into operation. When the input voltage is greater than or equal to the first voltage threshold, the second switch device 82 is closed, the loop 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 .

[0051] In the embodiment of the present application, the second electromagnet in the second relay can control the closing and opening of the second switch device according to the input voltage, so as to control the energy taking device to charge the third energy storage device through the power distribution terminal when the large circuit is operating normally. In this way, the automatic charging of the third energy storage device is realized, thereby improving the flexibility of the circuit control device.

[0052] In some embodiments, see Figure 2 , wherein the third relay 109 includes: a third electromagnet 91 and a third switch device 92, the third electromagnet 91 is connected in series with the energy taking device 101, and is used to control the closing and opening of the third switch device 92; the third switch device 92 is connected in series with the circuit breaker 103 and the third energy storage device 106, and when the third switch device 92 is closed, the third energy storage device 106 supplies power to the circuit breaker 103.

[0053] Here, the third switch device 92 has an independent armature, and the closing and opening of the third switch 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 is generated around it, and the armature in the third switch device 92 can be attracted by the magnetic field, so that the position of the armature changes, thereby controlling the closing or opening of the third switch device 92. The closing of the third switch 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 switch device 92 is disconnected, 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.

[0054] In the embodiment of the present application, the third relay includes a third electromagnet and a third switch device, and the third electromagnet automatically controls the closing and opening of the third switch device, thereby realizing automatic control of the third energy storage device to supply power to the circuit breaker. In this way, when the power distribution terminal has not yet entered the working state, but an abnormality occurs in the large circuit, the third energy storage device can be used to provide the circuit breaker with the power required to enter the disconnected state, thereby controlling the disconnection of the large circuit and improving the safety of the circuit.

[0055] In some embodiments, when the input voltage is less than the second voltage threshold, the third electromagnet 91 controls the third switch device 92 to be disconnected; when the input voltage is greater than or equal to the second voltage threshold, the third electromagnet 91 controls the third switch device 92 to be closed, and the third energy storage device 106 supplies power to the circuit breaker 103, and the circuit breaker 103 enters the disconnected state, controlling the large circuit to be disconnected.

[0056] Here, the armature in the third switch device 92 is in the disconnected position by default, and the second voltage threshold value can make the third electromagnet 91 generate enough suction force to attract the armature in the third switch device 92, so that the armature is in the closed position. The second voltage threshold value is determined according to the fault voltage of the large circuit. When the input voltage is greater than the second voltage threshold value, it means that the voltage of the large circuit is too high and is in a fault state. The second voltage threshold value is different from the first voltage threshold value and is usually set to about AC240V. When the input voltage is less than the second voltage threshold value, the magnetic force of the third electromagnet 91 is not enough to attract the armature to change its position, and the armature is in the default position, at which time the third switch device 92 is disconnected. When the input voltage is greater than or equal to the second voltage threshold value, the magnetic force of the third electromagnet 91 is enhanced, and the armature will change its position under the influence of the magnetic attraction force, and at this time the armature controls the third switch device 92 to close. That is to say, when the input voltage is less than the second voltage threshold value, the third switch device 92 is disconnected, the circuit between the third energy storage device 106 and the circuit breaker 103 is disconnected, 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 switch device 92 is closed, the loop 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 disconnected state, thereby controlling the large circuit to be disconnected.

[0057] In the embodiment of the present application, the third electromagnet in the third relay can control the closing and opening of the third switch device according to the input voltage, so as to provide the circuit breaker with the electric energy required to enter the disconnected state when the voltage of the large circuit is too high due to a fault. In this way, even if a fault occurs before the power distribution terminal is put into operation, the third energy storage device can still be used to ensure that the circuit breaker can enter the disconnected state normally, thereby controlling the disconnection of the large circuit and improving the safety of the circuit.

[0058] In some embodiments, when the distribution terminal 102 is in a working state and the input voltage is greater than the second voltage threshold, the distribution terminal 102 controls the circuit breaker 103 to enter a disconnected state, and the circuit breaker 103 controls the large circuit to be disconnected in the disconnected state; when the distribution terminal 102 is in a working state and the input voltage is less than the second voltage threshold, the distribution terminal 102 controls the circuit breaker 103 to enter a closed state, and the circuit breaker 103 controls the large circuit to be connected in the closed state.

[0059] Here, the power distribution terminal 102 can control the switching state of the circuit breaker under normal working conditions. When the input voltage is greater than the second voltage threshold, it means that the voltage of the large circuit is too high, and the power distribution terminal 102 controls the circuit breaker 103 to enter the disconnected state, and the circuit breaker 103 controls the circuit to be disconnected in the disconnected 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 a sub-circuit. 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 improving the safety of the circuit.

[0060] Optionally, the power distribution terminal 102 also includes a battery management unit, the energy extraction device 101 is connected to the battery management unit, and the battery management unit is also connected to the first energy storage device 104, the second energy storage device 105 and the third energy storage device 106 respectively. 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 by the battery management unit.

[0061] The following will describe an exemplary application of the embodiment of the present application in a practical application scenario, wherein the first voltage threshold is set to AC150V and the second voltage threshold is set to 240V as an example for description.

[0062] See also Figure 3 , Figure 3 1 is a schematic diagram of the circuit structure of the circuit control device in the normal state provided by the embodiment of the present application. When the large circuit is operating normally, the input voltage is AC220V, at which time the first switch device 72 in the first relay 107 is closed, the second switch device 82 in the second relay 108 is closed, and the third switch device 92 in the third relay 109 is open. Figure 3 As shown, the circuit includes the following loops: A loop is formed between the energy acquisition device 101, the power distribution terminal 102, and the first energy storage device 104. The energy acquisition 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. A loop is formed between the energy taking device 101 and the first electromagnet 71, and the first electromagnet 71 generates a magnetic attraction force to control the first switch device 72 to close; A loop is formed between the energy acquisition device 101, the power distribution terminal 102, the second energy storage device 105, and the first switch device 72, and the energy acquisition device 101 charges the second energy storage device 105 through the battery management system of the power distribution terminal 102; wherein, if the large circuit is powered off for 8 hours and then resumes normal operation, the first energy storage device 104 will be in a power-deficient state and will not be able to supply power to the power distribution terminal 102, and the second energy storage device 105 will be used to supply power to the power distribution terminal 102; A loop is formed between the energy taking device 101 and the second electromagnet 81, and the second electromagnet 81 generates a magnetic attraction force to control the second switch device 82 to close; A loop is formed between the energy acquisition device 101 , the power distribution terminal 102 , the third energy storage device 106 , and the second switch device 82 , and the energy acquisition device 101 charges the third energy storage device 106 through the battery management system of the power distribution terminal 102 .

[0063] Continue to see Figure 2 , Figure 2 It can also be regarded as a schematic diagram of the circuit structure of the circuit control device in the 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 switch device 72 in the first relay 107 is disconnected, the second switch device 82 in the second relay 108 is disconnected, and the third switch device 92 in the third relay 109 is disconnected. Therefore, within 8 hours of power outage, a loop 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 is exhausted and enters a power-deficient state.

[0064] See also Figure 4 , Figure 4 It is a schematic diagram of the circuit structure of the circuit control device under the fault state provided in the embodiment of the present application. When the large circuit is powered off for more than 8 hours and then restored, the power distribution terminal 102 needs 8 seconds to restart. During this period, the large circuit may fail, resulting in an excessively high input voltage, reaching AC270V. At this time, the first switch device 72 in the first relay 107 is closed, the second switch device 82 in the second relay 108 is closed, and the third switch device 92 in the third relay 109 is closed. Therefore, a loop will be formed between the third energy storage device 106 and the circuit breaker 103, and the circuit breaker 103 will be powered by the third energy storage device 106, so that the circuit breaker enters the disconnected state, thereby controlling the large circuit to be disconnected.

[0065] In an embodiment of the present application, the first energy storage device is put into operation for a long time, and is charged and supplies power to the distribution terminal when the large circuit is operating normally without failure. When the large circuit fails and the power is cut off, it is automatically put into operation to maintain the power distribution terminal to operate without power. A first relay is installed between the second energy storage device and the distribution terminal. When the large circuit is operating normally, the first switch device in the first relay is closed, and the second energy storage device is charged. When the large circuit is disconnected and the power is cut off, the first switch device in the first relay is disconnected, and the second energy storage device can be exited in a fully charged state. At this time, the first energy storage device supplies power to the distribution terminal. When the large circuit loses power for a long time and is connected again, 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 switch device of the first relay is closed, and the second energy storage device can be put into operation for the distribution terminal, thereby increasing the input 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 switch device of the second relay is closed, and the third energy storage device is charged. When the large circuit is disconnected for more than 8 hours and then connected again, the power distribution terminal needs 8s to start up. If the large circuit fails at this time, the power distribution terminal cannot effectively detect and respond to the fault. 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 the large circuit has failed at this time), the third switch device in the third relay is closed, the third energy storage device is put into operation and controls the circuit breaker to enter the disconnected state, thereby ensuring the safety of other equipment in the large circuit.

[0066] In summary, the embodiment of the present application provides a circuit control device. When the power is turned on again after the large circuit has been out of power for more than 8 hours, and 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 be used to supply power to the distribution terminal, so that the distribution terminal can 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 supply power to the circuit breaker. In this way, even if a fault occurs during the 8-second process of starting the distribution terminal, the distribution terminal cannot control the circuit breaker to enter the disconnected state. The third energy storage device can also be used to ensure that the circuit breaker enters the disconnected state, so that the large circuit is disconnected, thereby improving the safety of the circuit. In this way, the embodiment of the present application can improve the working efficiency and reliability of the circuit control device and improve the safety of the circuit by using three energy storage devices in combination.

[0067] The above is only an embodiment of the present application and is not intended to limit the protection scope of the present application. Any modifications, equivalent substitutions and improvements 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 comprises: 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; The power distribution terminal is connected to the energy acquisition 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.

2. The circuit control device according to claim 1, characterized in that: The device also includes: a first relay, a second relay and a third relay; The first relay is connected to the energy taking device, and the second energy storage device is connected to 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, and the third energy storage device is connected to 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; The third relay is connected to the energy taking device, and the third energy storage device is connected to the circuit breaker, and is used to control the third energy storage device to supply power to the circuit breaker.

3. The circuit control device according to claim 2, characterized in that: The first relay includes a first electromagnet and a first switching device; The first electromagnet is connected in series with the energy taking device, and is used to control the first switch device to be closed or opened; The first switch device is connected in series with the power distribution terminal and the second energy storage device respectively. 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, characterized in that: When the input voltage of the energy acquisition device is less than a first voltage threshold, the first electromagnet controls the first switch device to be disconnected; 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 extraction 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, characterized in that: 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 first energy storage device supplies power to the power distribution terminal, the energy acquisition 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 switch device to close, and the first energy storage device is in a power-deficient 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 switch device, and the power distribution terminal is connected to the third energy storage device; The second electromagnet is connected in series with the energy taking device, and is used to control the second switch device to be closed or opened; The second switch device is connected in series with the power distribution terminal and the third energy storage device respectively. When the second switch device is closed, the energy extraction device charges the third energy storage device through the power distribution terminal.

7. The circuit control device according to claim 6, characterized in that: When the input voltage of the energy taking device is less than a first voltage threshold, the second electromagnet controls the second switch device to be disconnected; When the input voltage is greater than or equal to the first voltage threshold, the second electromagnet controls the second switch device to close, and the power distribution terminal charges the third energy storage device.

8. The circuit control device according to claim 2, characterized in that: The third relay comprises a third electromagnet and a third switch device; The third electromagnet is connected in series with the energy taking device 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 third switch device is closed, the third energy storage device supplies power to the circuit breaker.

9. The circuit control device according to claim 8, characterized in that: When the input voltage of the energy taking device is less than a second voltage threshold, the third electromagnet controls the third switch device to be disconnected; 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, the circuit breaker enters the disconnected state, and controls the circuit to be disconnected.

10. The circuit control device according to any one of claims 1 to 8, characterized in that: When the power distribution terminal is in a working state and the input voltage of the energy acquisition device is greater than a second voltage threshold, the power distribution terminal controls the circuit breaker to enter an off state, and the circuit breaker controls the circuit to be disconnected in the off 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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