Power re-supply device

Abstract

The utility model discloses a re-power supply device which comprises a first re-power supply drawer and a second re-power supply drawer which are detachably and electrically connected through a cable. The first re-power supply drawer is provided with a first plug connector, a power supply switch and a first connector; the power supply switch is electrically connected between the first plug connector and the first connector; the second re-power supply drawer is provided with a second plug connector and a second connector, and the second plug connector is electrically connected with the second connector; the two ends of the cable can be detachably and electrically connected with the first connector and the second connector respectively. According to the utility model, the operation time of the nuclear power plant in the re-power supply process is effectively reduced, and the connection mode is simplified.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a power supply device. Background Technology

[0002] When nuclear power plant units are under maintenance, the AC busbars are de-energized. After the busbars are de-energized, all equipment connected to them will stop working. However, equipment such as elevators, lighting, ventilation, and heater heat tracing systems cannot be de-energized.

[0003] Existing technology can isolate the power supply from the entire row of power sources in an adjacent live switchboard by finding a spare drawer, and then re-energize the equipment that cannot be shut down using a temporary cable termination. However, this re-energization method suffers from problems such as long power outage times and complex connections. Utility Model Content

[0004] This invention provides a repower drawer to solve the problems of long power outage time and complex connections when repowering equipment that cannot be shut down during nuclear power plant maintenance.

[0005] According to one aspect of the present invention, a power regeneration device is provided, comprising: a first power regeneration drawer and a second power regeneration drawer, wherein the first power regeneration drawer and the second power regeneration drawer are detachably electrically connected by a cable;

[0006] The first repower drawer is provided with a first plug, a power switch and a first connector; the power switch is electrically connected between the first plug and the first connector;

[0007] The second repower drawer is provided with a second plug and a second connector, the second plug and the second connector being electrically connected; both ends of the cable can be detachably electrically connected to the first connector and the second connector, respectively.

[0008] Optionally, the first connector includes a first aviation plug, and the second connector includes a second aviation plug;

[0009] The first aviation plug is compatible with the second aviation plug;

[0010] The first aviation plug is located at the output end of the first power supply drawer, and the first end of the cable can be paired and connected to the first aviation plug;

[0011] The second aviation plug is located at the input end of the second repower drawer, and the second end of the cable can be mated and connected to the second aviation plug.

[0012] The technical solution of this utility model allows for the replacement of the original two power supply drawers with a first repower supply drawer and a second repower supply drawer during or before a power outage maintenance period. These two repower supply drawers are then connected by cables. This eliminates the need to shut down the entire row of drawer switches when repowering critical equipment in the power plant. This not only reduces the scope of the power outage but also effectively simplifies the operation steps and reduces the outage time. Furthermore, this utility model employs a detachable electrical connection between the first and second repower supply drawers, allowing current to be flexibly transferred to electrical equipment that cannot be powered down, solving the problems of inconvenient connection and difficult maintenance inherent in traditional repower supply devices. In short, this utility model effectively reduces the operation time of nuclear power plants during the repower supply process and simplifies the connection method.

[0013] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of a repower supply device provided in an embodiment of this utility model;

[0016] Figure 2 A schematic diagram of the structure of a first repower drawer provided in an embodiment of this utility model;

[0017] Figure 3 A schematic diagram of the structure of a second repower drawer provided in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal wiring of a power supply device provided in an embodiment of the present invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] Figure 1 This is a schematic diagram of a power resupply device provided in an embodiment of the present invention. This embodiment can be applied to resupplying equipment that cannot be shut down during power outage maintenance at a nuclear power plant. Figure 1 As shown, the power supply device includes: a first power supply drawer 110 and a second power supply drawer 210, which are detachably electrically connected via a cable 310; the first power supply drawer 110 is provided with a first plug 111, a power switch 112 and a first connector 113; the power switch 112 is electrically connected between the first plug 111 and the first connector 113; the second power supply drawer 210 is provided with a second plug 211 and a second connector 212, which are electrically connected; both ends of the cable 310 can be detachably electrically connected to the first connector 113 and the second connector 212 respectively.

[0022] Specifically, the first power supply drawer 110 refers to a module or unit in the power supply device, which contains the necessary electrical components for power supply. The second power supply drawer 210 refers to another module or unit in the power supply device, which contains the necessary electrical components for power supply. The first power supply drawer 110 and the second power supply drawer 210 are similar in appearance and can be easily inserted and removed from the power distribution cabinet like drawers, facilitating maintenance and replacement.

[0023] The first connector 111 refers to the component in the first repower drawer 110 used for connecting electrical equipment. In this embodiment of the invention, the first connector 111 is used to connect to an external power source, allowing current to flow into the first repower drawer 110. The power switch 112 refers to a control device capable of turning on or off the current flow between the first connector 111 and the first connector 113. For example, the power switch 112 may include electrical switches such as grounding relays, circuit breakers, and contactors. The second connector 211 refers to the component in the second repower drawer 210 used for connecting electrical equipment. In this embodiment of the invention, the second connector 211 is used to connect to a power supply device that cannot be shut down, allowing current to flow from the second repower drawer 210 to the load.

[0024] Cable 310 refers to the wire used to connect the first power supply drawer 110 and the second power supply drawer 210. First connector 113 refers to the component in the first power supply drawer 110 used to achieve an electrical connection between two electrical components. Second connector 212 refers to the component in the second power supply drawer 210 used to achieve an electrical connection between two electrical components. A detachable electrical connection refers to a connection method that allows cable 310 to be easily connected or disconnected as needed. In this embodiment of the invention, first connector 113 and second connector 212 are used to connect cable 310 to achieve a detachable electrical connection of cable 310.

[0025] In this embodiment of the invention, current flows through the first connector 111 into the first repower drawer 110, then through the cable 310 into the second repower drawer 210, and finally through the second connector 211 into the electrical equipment that cannot be powered off. The two ends of the cable 310 are connected to the first connector 113 and the second connector 212 respectively, supporting a detachable electrical connection for flexible connection and maintenance.

[0026] The technical solution of this utility model allows for the replacement of the original two power supply drawers with a first repower supply drawer and a second repower supply drawer during or before a power outage maintenance period. These two repower supply drawers are then connected by cables. This eliminates the need to shut down the entire row of drawer switches when repowering critical equipment in the power plant. This not only reduces the scope of the power outage but also effectively simplifies the operation steps and reduces the outage time. Furthermore, this utility model employs a detachable electrical connection between the first and second repower supply drawers, allowing current to be flexibly transferred to electrical equipment that cannot be powered down, solving the problems of inconvenient connection and difficult maintenance inherent in traditional repower supply devices. In short, this utility model effectively reduces the operation time of nuclear power plants during the repower supply process and simplifies the connection method.

[0027] Based on the above embodiments, continue to refer to Figure 1Optionally, the first connector 113 includes a first aviation plug 114, and the second connector 212 includes a second aviation plug 213; the first aviation plug 114 is mated with the second aviation plug 213; the first aviation plug 114 is disposed at the output end of the first repower drawer 110, and the first end of the cable 310 can be mated and connected to the first aviation plug 114; the second aviation plug 213 is disposed at the input end of the second repower drawer 210, and the second end of the cable 310 can be mated and connected to the second aviation plug 213.

[0028] Specifically, an aviation plug refers to an electrical connector specifically designed for use in aviation, aerospace, and other demanding environments. It is capable of transmitting high current and voltage and is suitable for applications requiring high power. The first aviation plug 114 is mounted on the first connector 113, and the second aviation plug 213 is mounted on the second connector 212.

[0029] In this embodiment of the invention, the pins and arrangement points of the electrical connection between the first aviation plug 114 and the second aviation plug 213 are consistent, which can ensure the correct transmission of current. Using aviation plugs to connect the two ends of the cable 310 to the first repower drawer 110 and the second repower drawer 210 makes connecting and disconnecting the cable 310 simpler and faster, and is suitable for occasions with frequent replacements.

[0030] Based on the above embodiments, continue to refer to Figure 1 Optionally, the input end of the first connector 111 is connected to the power supply bus, and the output end of the first connector 111 is connected to the input end of the first power supply drawer 110, for transmitting electrical energy from the power supply bus to the first power supply drawer 110; the input end of the second connector 211 is connected to the output end of the second power supply drawer 210, and the output end of the second connector 211 is connected to the powered side, for transmitting electrical energy from the second power supply drawer 210 to the load.

[0031] Specifically, the repower bus refers to another power supply bus specifically reserved to provide AC power to equipment that cannot be powered down when the original AC bus stops supplying power during nuclear power plant maintenance. The powered side refers to the part connected through the output terminal of the second connector 211, which is responsible for receiving electrical energy transmitted from the second repower drawer 210 and supplying it to equipment that cannot be powered down during nuclear power plant maintenance.

[0032] In this embodiment of the invention, when a nuclear power plant is shut down for maintenance, the original AC bus stops supplying power. The first repower drawer 110 obtains power from the repower bus, and the second repower drawer 210 transmits the power to the loads connected to it that cannot be shut down, ensuring that the key equipment and systems of the nuclear power plant can continue to operate during the power outage and avoiding safety hazards caused by the power outage.

[0033] The technical solution of this utility model embodiment connects the cable via a first aviation plug and a second aviation plug, eliminating any exposed live parts and reducing the risk of electric shock. Furthermore, the aviation plugs eliminate the need to verify the cable's phase sequence, simplifying the operation and reducing human error.

[0034] Figure 2 This is a schematic diagram of the structure of a first re-power supply drawer provided in an embodiment of the present utility model. Based on the above embodiments, as follows... Figure 2 As shown, the first repower drawer 110 further includes: a first compartment 120 and a second compartment 130; a first connector 111 is disposed at the input end of the first compartment 120; a first aviation plug 114 is disposed at the output end of the second compartment 130; a first partition 140 is disposed between the first compartment 120 and the second compartment 130; a first hole 141 is disposed on the first partition 140; and the wires in the first repower drawer 110 pass through the first hole 141.

[0035] Specifically, the first compartment 120 refers to a part of the first repower drawer 110, mainly used for receiving power input. A first connector 111 is located at the input end of the first compartment 120 for connecting to the repower bus to receive electrical energy. The second compartment 130 refers to another part of the first repower drawer 110, mainly used for outputting the received electrical energy to a load. A first aviation plug 114 is located at the output end of the second compartment 130 for connecting to a load. The first partition 140 refers to the structure located between the first compartment 120 and the second compartment 130, serving as physical isolation to ensure that electrical equipment and components in the two compartments do not interfere with each other, while also improving safety. For example, the material of the first partition 140 can be an insulating material such as polyvinyl chloride. The first hole 141 refers to an opening in the first partition 140 that allows wires in the first repower drawer 110 to pass through, so as to transmit electrical energy from the first compartment 120 to the second compartment 130. Providing the first hole 141 in the first partition 140 enables necessary electrical connections while maintaining compartment isolation.

[0036] In this embodiment of the utility model, the first partition 140 divides the first repower drawer 110 into a first compartment 120 and a second compartment 130. The electrical energy received by the first connector 111 flows through the first compartment 120 to the second compartment 130, and then through the second compartment 130 to the second repower drawer 210.

[0037] Figure 3 This is a schematic diagram of the structure of a second re-power supply drawer provided in an embodiment of the present utility model. Based on the above embodiments, as follows... Figure 3As shown, the second repower drawer 210 also includes a third compartment 220 and a fourth compartment 230. A second aviation plug 213 is disposed at the input end of the third compartment 220, and a second connector 211 is disposed at the output end of the fourth compartment 230. A second partition 240 is disposed between the third compartment 220 and the fourth compartment 230. A second hole 241 is disposed on the second partition 240, and the wires in the second repower drawer 210 pass through the second hole 241.

[0038] Specifically, the third compartment 220 refers to a portion of the second repower drawer 210, primarily used for receiving electrical energy. A second aviation plug 213 is located at the input end of the third compartment 220 for receiving electrical energy from the first repower drawer 110. The fourth compartment 230 refers to another portion of the second repower drawer 210, primarily used for outputting electrical energy. A second connector 211 is located at the output end of the fourth compartment 230 for transmitting the electrical energy received by the second repower drawer 210 to the load. The second partition 240 refers to the structure located between the third compartment 220 and the fourth compartment 230, serving as a physical barrier to ensure that electrical equipment and components in the two compartments do not interfere with each other, while also improving safety. For example, the material of the second partition 240 can be an insulating material such as polyvinyl chloride. The second hole 241 refers to an opening on the second bulkhead 240 that allows wires in the second repower drawer 210 to pass through in order to transfer electrical energy from the third compartment 220 to the fourth compartment 230. The second hole 241 on the second bulkhead 240 enables the necessary electrical connection while maintaining compartment isolation.

[0039] In this embodiment of the utility model, the second partition 240 divides the second power supply drawer 210 into a third compartment 220 and a fourth compartment 230. The electrical energy received by the second aviation plug 213 flows through the third compartment 220 to the fourth compartment 230, and then through the fourth compartment 230 to the load.

[0040] The technical solution of this utility model embodiment divides the first repower drawer into a first compartment and a second compartment using a first partition, and the second repower drawer into a third compartment and a fourth compartment using a second partition. Distributing the electrical components in different compartments helps to better manage heat dissipation, avoid overheating, and improve the operational stability and service life of the equipment. Furthermore, this compartmentalized structure allows for better system scalability, enabling modular upgrades as needed. In short, this utility model has the advantages of high stability, long service life, and good scalability.

[0041] Based on the above embodiments, see below. Figure 2Optionally, the first compartment 120 includes a grounding relay 121, which is connected to the first connector 111; the second compartment 130 includes a circuit breaker 131 and a contactor 132, with the circuit breaker 131 connected to the grounding relay 121 and the contactor 132 connected to both the circuit breaker 131 and the first aviation connector 114.

[0042] Specifically, the power supply switch 112 may include a grounding relay 121, a circuit breaker 131, and a contactor 132. In this embodiment, the grounding relay 121 is used to detect grounding faults. When a grounding fault occurs in the power supply drawer, the grounding relay 121 will quickly respond and disconnect the circuit to protect equipment and personnel safety. The circuit breaker 131 is used for overload and short-circuit protection. When the current exceeds a preset value, the circuit breaker 131 will automatically disconnect the circuit to prevent equipment damage and fire risks. The contactor 132 is used to switch the circuit by electromagnetic action to allow or block the flow of current.

[0043] Figure 4 This is a schematic diagram of the internal wiring of a power supply device provided in an embodiment of the present invention. Based on the above embodiments, as follows... Figure 4 As shown, the grounding relay includes: a first coil 122 and a normally open contact 123; the first coil 122 is connected in series with the first connector 111 and the second contact 133 of the circuit breaker respectively; the normally open contact 123 is connected to the shunt trip coil 134 of the circuit breaker.

[0044] In this embodiment of the invention, the first coil 122 of the grounding relay is connected to the power supply bus via the first connector 111, i.e., connected to the three-phase AC power. When the power supply device is grounded, the normally open contact 123 closes, the shunt trip coil 134 of the circuit breaker is energized, causing the second contact 133 of the circuit breaker to open and disconnect the circuit.

[0045] Based on the above embodiments, see below. Figure 4 Optionally, the second compartment also includes a protection module, which includes a current monitoring unit 142 and a protection unit 143. The current monitoring unit 142 is connected in series with the first connector 111 and is used to monitor the three-phase current flowing from the repower bus into the first repower drawer. The first end of the protection unit 143 is connected to the output end of the current monitoring unit 142, and the second end of the protection unit 143 is connected to the door adapter 144. The protection unit 143 is used to protect the repower device according to the current information detected by the current monitoring unit 142, and to interact with the client through the door adapter 144.

[0046] Specifically, the protection module refers to the module that monitors and protects the load from the repower supply drawer. The current monitoring unit 142 is part of the protection module, and its main function is to monitor the three-phase current flowing into the first repower supply drawer from the repower bus. The protection unit 143 is another part of the protection module, connected to the output of the current monitoring unit 142, and performs protection measures based on the current information provided by the current monitoring unit 142. For example, the protection unit 143 may be a Simocode module.

[0047] In this embodiment of the invention, the current monitoring unit 142 monitors the current flowing from the repower bus into the first repower drawer in real time and feeds it back to the protection unit 143. The protection unit 143 executes protection measures based on the received current signal, such as sending an alarm signal to the client via the door adapter 144. Furthermore, the client can also interact with the protection unit 143 via the door adapter 144 to remotely monitor and manage the protection unit 143. A DC power supply 145 powers the protection unit 143.

[0048] Based on the above embodiments, continue to refer to Figure 4 Optionally, the contactor includes: a first contact 135, a second coil 136, a normally open auxiliary contact 137, and a normally closed auxiliary contact 138; the first contact 135 is connected in series with the current monitoring unit 142; the second coil 136 is connected to the third terminal of the protection unit 143; the normally open auxiliary contact 137 is connected to the first indicator light 150; and the normally closed auxiliary contact 138 is connected to the second indicator light 160.

[0049] In this embodiment of the invention, for example, when the current monitoring unit 142 detects that the current is normal, it sends a signal to the protection unit 143. The protection unit 143 energizes the second coil 136, and the first contact 135 closes, allowing the three-phase AC current to pass through. Furthermore, the normally open auxiliary contact 137 closes, the first indicator light 150 illuminates, and the normally closed auxiliary contact 138 opens, the second indicator light 160 does not illuminate, thus indicating the working status of the contactor.

[0050] The technical solution of this utility model embodiment, through the cooperation of a grounding relay, contactor, circuit breaker, current monitoring unit, and protection unit, ensures that three-phase AC power flows through the first repower drawer when there are no abnormalities, and immediately cuts off the current when an abnormality occurs in the first repower drawer, protecting the safety of the first repower drawer. This utility model can ensure the safe operation of the first repower drawer during the repowering process, thereby reducing potential losses and risks.

[0051] Based on the above embodiments, optionally, a first mark is provided on the first repower drawer and a second mark is provided on the second repower drawer.

[0052] Specifically, the first marking refers to the identifier or label set on the first power supply drawer, used to distinguish and identify the function, location, or other important information of that drawer. The second marking refers to the identifier or label set on the second power supply drawer, used to distinguish and identify the function, location, or other important information of that drawer. For example, the first and second power supply drawers can be set to a different color than the two power supply drawers that are being replaced, to distinguish them from the original drawers, effectively avoiding the risk of maintenance personnel accidentally touching live parts during the cleaning of the cabinet, and preventing human error.

[0053] The technical solution of this utility model embodiment, by setting a first mark on the first repower drawer and a second mark on the second repower drawer, can distinguish and identify the two repower drawers, thereby playing a warning role and reducing the probability of accidents.

[0054] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0055] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A power regeneration device, characterized in that, include: A first power supply drawer and a second power supply drawer are detachably electrically connected by a cable. The first repower drawer is provided with a first plug-in component, a power switch and a first connector; The power supply switch is electrically connected between the first plug and the first connector; The second repower drawer is provided with a second plug and a second connector, and the second plug and the second connector are electrically connected; The two ends of the cable can be detachably electrically connected to the first connector and the second connector, respectively.

2. The power supply device according to claim 1, characterized in that, The first connector includes a first aviation plug, and the second connector includes a second aviation plug; The first aviation plug is compatible with the second aviation plug; The first aviation plug is located at the output end of the first power supply drawer, and the first end of the cable can be paired and connected to the first aviation plug; The second aviation plug is located at the input end of the second repower drawer, and the second end of the cable can be mated and connected to the second aviation plug.

3. The power supply device according to claim 2, characterized in that, The input end of the first connector is connected to the power supply bus, and the output end of the first connector is connected to the input end of the first power supply drawer, for transmitting electrical energy from the power supply bus to the first power supply drawer; The input end of the second connector is connected to the output end of the second repower drawer, and the output end of the second connector is connected to the powered side, for transmitting electrical energy in the second repower drawer to the load.

4. The power supply device according to claim 3, characterized in that, The first repower drawer further includes: a first compartment and a second compartment, the first connector being disposed at the input end of the first compartment, and the first aviation plug being disposed at the output end of the second compartment; A first partition is provided between the first compartment and the second compartment, and a first hole is provided on the first partition. The wires in the first repower drawer pass through the first hole.

5. The power supply device according to claim 3, characterized in that, The second repower drawer further includes a third compartment and a fourth compartment, wherein the second aviation plug is disposed at the input end of the third compartment and the second connector is disposed at the output end of the fourth compartment; A second partition is provided between the third compartment and the fourth compartment, and a second hole is provided on the second partition. The wires in the second repower drawer pass through the second hole.

6. The power supply device according to claim 4, characterized in that, The first compartment includes: a grounding relay, which is connected to the first connector; The second compartment includes a circuit breaker and a contactor, the circuit breaker being connected to the grounding relay, and the contactor being connected to both the circuit breaker and the first aviation plug.

7. The power supply device according to claim 6, characterized in that, The grounding relay includes: a first coil and a normally open contact; The first coil is connected in series with the first connector and the second contact of the circuit breaker, respectively. The normally open contact is connected to the shunt trip coil of the circuit breaker.

8. The power supply device according to claim 6, characterized in that, The second compartment also includes: a protection module, which includes a current monitoring unit and a protection unit; The current monitoring unit is connected in series with the first connector and is used to monitor the three-phase current flowing from the repower bus into the first repower drawer; The first end of the protection unit is connected to the output end of the current monitoring unit, and the second end of the protection unit is connected to the door adapter. The protection unit is used to protect the power supply device according to the current information detected by the current monitoring unit, and to exchange information with the client through the door adapter.

9. The power supply device according to claim 8, characterized in that, The contactor includes: a first contact, a second coil, a normally open auxiliary contact, and a normally closed auxiliary contact; The first contact is connected in series with the current monitoring unit; The second coil is connected to the third end of the protection unit, the normally open auxiliary contact is connected to the first indicator light, and the normally closed auxiliary contact is connected to the second indicator light.

10. The power supply device according to claim 1, characterized in that, The first repower drawer is marked with a first mark, and the second repower drawer is marked with a second mark.

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