Low voltage switchboard backup power supply device and re-powering system

Abstract

The application discloses a low-voltage distribution board standby power supply device and a power supply system, and belongs to the field of power supply system. The low-voltage distribution board standby power supply device comprises a standby power supply module, a standby distribution board and a distribution board cabinet body. The standby distribution board is provided with a first drawer chamber for inserting a function drawer, and the distribution board cabinet body is provided with a second drawer chamber for inserting a power supply drawer. The power supply drawer is electrically connected with the function drawer and forms an electric energy and signal transmission channel with a function load. Through the above structure, when the distribution board cabinet body loses the main power supply, the external power supply is transmitted to the function load through the power supply drawer after being controlled by the function drawer, and the transmission of control signals and feedback signals is realized, so that the controllable operation state of the load is maintained. Compared with the existing temporary power supply mode, the application not only restores the power supply capacity, but also retains the original control logic, and at the same time, the field cable does not need to be disconnected, the operation complexity and wiring risk are reduced, and the system safety and adaptability are improved.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant power distribution system technology, and in particular to a low-voltage switchboard backup power supply device and repower system. Background Technology

[0002] Low-voltage switchboards are widely used in industrial sites to supply power and control functional loads such as motors and electric valves. In actual operation, when the switchboard busbar is shut down due to maintenance or a fault, some downstream loads still require temporary operation, such as starting or stopping electric valves or performing equipment commissioning. To meet these needs, temporary power supply methods are typically used to power the loads.

[0003] In existing technologies, common temporary power supply methods mainly include: disconnecting the load cable from the distribution panel and connecting it to a temporary power source, or supplying power to the distribution panel through a temporary power supply device. However, these methods generally only provide a primary power path, that is, only providing voltage, current, and other power to the load. Existing temporary power supply methods cannot achieve remote control and status monitoring; operators can only complete equipment operation through on-site manual intervention, which not only reduces work efficiency but also increases the risk of misoperation. Summary of the Invention

[0004] This invention provides a low-voltage switchboard backup power supply device and a re-power supply system to solve the above-mentioned technical problems.

[0005] A first aspect of this invention provides a backup power supply device for a low-voltage switchboard, the backup power supply device for the low-voltage switchboard being connected to a functional load, including: Backup power module, used to provide working power; A backup power distribution panel is connected to a backup power module. The backup power distribution panel is equipped with a first drawer compartment, which is used to connect to a function drawer. The function drawer is used to output electrical signals and control signals. The distribution panel cabinet has a second drawer compartment, which is connected to the functional load via a line. The second drawer compartment is used to plug in the repower drawer, which is electrically connected to the functional drawer. The repower drawer is used to output electrical and control signals to the functional load, as well as to receive feedback signals sent by the functional load and output the feedback signals to the functional drawer.

[0006] Optionally, the side wall of the first drawer compartment is provided with an AC power input socket, a first AC power output socket, a DC power input socket, and a first control signal output socket. The AC power input socket and the DC power input socket are respectively connected to the backup power module, and the first AC power output socket and the first control signal output socket are respectively connected to the rechargeable drawer.

[0007] Optionally, when the function drawer is inserted into the first drawer compartment, the function drawer is connected to the AC power input socket, the first AC power output socket, the DC power input socket, and the first control signal output socket, respectively. The functional drawer is used to receive AC power through the AC power input socket, output AC power through the first AC power output socket, receive DC power through the DC power input socket, and transmit control signals and feedback signals through the first control signal output socket.

[0008] Optionally, the backup distribution panel also includes an AC power busbar and a DC power busbar. The AC power busbar is connected to the backup power module and the AC power input socket, respectively, and the DC power busbar is connected to the backup power module and the DC power input socket, respectively.

[0009] Optionally, the functional drawer includes a power output unit and a control unit. The power output unit is connected to an AC power input socket and a first AC power output socket, respectively. The control unit is connected to a DC power input socket, a first control signal output socket, and the power output unit, respectively. The control unit controls the power output unit to output AC power and outputs control signals, as well as receives feedback signals and controls the power output unit to switch on and off based on the feedback signals.

[0010] Optionally, the repower drawer includes an incoming line unit, a switching unit, and an outgoing line unit; The cable entry unit includes a first cable entry plug and a second cable entry plug. The first cable entry plug and the second cable entry plug are respectively connected to the function drawer. The first cable entry plug is connected to the first end of the switch unit, and the second cable entry plug is connected to the second end of the switch unit. The outgoing unit includes a third outgoing plug and a fourth outgoing plug. The third outgoing plug is connected to the third terminal of the switch unit, and the fourth outgoing plug is connected to the fourth terminal of the switch unit. The first incoming plug and the third outgoing plug are used to transmit electrical signals, while the second incoming plug and the fourth outgoing plug are used to transmit control signals and feedback signals. The switching unit is used to control the connection between the first incoming plug and the third outgoing plug, as well as the connection between the second incoming plug and the fourth outgoing plug.

[0011] Optionally, the repower drawer includes an incoming line unit, a switching unit, and an outgoing line unit; The cable entry unit includes a first cable entry plug and a second cable entry plug. The first cable entry plug and the second cable entry plug are respectively connected to the function drawer. The first cable entry plug is connected to the first end of the switch unit. The outgoing unit includes a third outgoing plug and a fourth outgoing plug. The third outgoing plug is connected to the second end of the switch unit, and the fourth outgoing plug is connected to the second incoming plug. The first incoming plug and the third outgoing plug are used to transmit electrical signals, while the second incoming plug and the fourth outgoing plug are used to transmit control signals and feedback signals. The switching unit is used to control the connection between the first incoming plug and the third outgoing plug.

[0012] Optionally, the side wall of the second drawer compartment is provided with a second AC power output socket and a second control signal output socket. The second AC power output socket is connected to the power input terminal of the third outgoing plug and the functional load, respectively, and the second control signal output socket is connected to the control terminal of the fourth outgoing plug and the functional load, respectively.

[0013] Optionally, both the first and second incoming line plugs can be aviation plugs.

[0014] A second aspect of the present invention provides a power supply system, including a low-voltage switchboard backup power supply device and a functional load as described in the first aspect.

[0015] The technical advantage of this invention is that it can maintain the controllable operation of the functional load even when the original distribution panel loses power. Compared with temporary power supply methods that only provide power, this solution not only restores the load's power supply capability but also restores the transmission channels for control signals and feedback signals, enabling the load to operate according to the existing control logic, thereby avoiding problems such as malfunctions and loss of control. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the first structure of a low-voltage switchboard backup power supply device provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the first drawer compartment in a low-voltage switchboard backup power supply device provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the second structure of a low-voltage switchboard backup power supply device provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the connection between the backup power module and the first drawer compartment in a low-voltage switchboard backup power supply device according to Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the third structure of a low-voltage distribution panel backup power supply device provided in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the first structure of the repower drawer in the backup power supply device of a low-voltage distribution panel provided in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the second structure of the power supply drawer in the backup power supply device of a low-voltage distribution panel provided in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the connection structure between the power supply drawer and the functional load in a low-voltage distribution panel backup power supply device according to Embodiment 1 of the present invention; Figure 9 This is a left view of the specific structure of the repower drawer in a low-voltage distribution panel backup power supply device provided in Embodiment 1 of the present invention; Figure 10 This is a front view of the specific structure of the repower drawer in a low-voltage distribution panel backup power supply device provided in Embodiment 1 of the present invention; Figure 11 This is a top view of the specific structure of the repower drawer in the backup power supply device of a low-voltage distribution panel provided in Embodiment 1 of the present invention; In the diagram: 101, Backup power module; 102, Backup distribution panel; 103, First drawer compartment; 104, Functional drawer; 105, Distribution panel cabinet; 106, Second drawer compartment; 107, Re-power drawer; 108, Functional load; 131, AC power input socket; 132, First AC power output socket; 133, DC power input socket; 134, First control signal output socket; 135, AC power busbar; 136, DC power busbar; 141, Power output unit; 142, Control unit; 161, Second AC power output socket; 162, Second control signal output socket; 201, Incoming line unit; 202, Switch unit; 203, Outgoing line unit; 221, First incoming line plug; 222, Second incoming line plug; 231, Third outgoing line plug; 232, Fourth outgoing line plug. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be understood that the invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. The same reference numerals denote the same elements throughout.

[0020] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this invention, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0021] To fully understand this invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0022] Example 1 This embodiment provides a backup power supply device for a low-voltage distribution panel, such as... Figure 1 As shown, the low-voltage switchboard backup power supply device connects to the functional load 108, including: Backup power module 101 is used to provide working power; A backup power distribution panel 102 is connected to a backup power module 101. The backup power distribution panel 102 is provided with a first drawer compartment 103. The first drawer compartment 103 is used to plug in a function drawer 104. The function drawer 104 is used to output electrical signals and control signals. The distribution panel cabinet 105 has a second drawer compartment 106. The second drawer compartment 106 is connected to the functional load 108 via a line. The second drawer compartment 106 is used to plug in the repower drawer 107. The repower drawer 107 is electrically connected to the functional drawer 104. The repower drawer 107 is used to output electrical signals and control signals to the functional load 108, and to receive feedback signals sent by the functional load 108 and output the feedback signals to the functional drawer 104.

[0023] This embodiment provides a backup power supply device for maintaining controllable operation of the load when the main power supply of the distribution panel cabinet is unavailable. The device is composed of a backup power module 101, a backup distribution panel 102, and the original distribution panel cabinet 105, and is used to restore temporary power supply and control to the functional load 108 without changing the original load wiring.

[0024] The backup power module 101 provides the electrical energy required for system operation. This module can be connected to an external three-phase AC power supply or an independent power supply device, depending on site conditions. It can also provide auxiliary power supplies of various DC voltage levels to meet the power supply needs of the control circuit.

[0025] The standby distribution panel 102 serves as a temporary working platform for the functional drawer 104, and its internal structure is identical or compatible with that of the original distribution panel. After the functional drawer 104, originally installed in the distribution panel cabinet 105, is moved to the standby distribution panel 102, it retains its original electrical connections and control logic. In other words, the contactors, protection units, and control circuits inside the functional drawer 104 can continue to function in this environment, thereby controlling, switching, and protecting the input electrical energy. Simultaneously, the standby distribution panel 102 also undertakes the functions of power distribution and signal transfer, outputting the electrical signals and control information processed by the functional drawer 104 to subsequent units.

[0026] Functional drawer 104 integrates the control logic and protection mechanisms required for load operation. When external power is input through the standby distribution panel 102, functional drawer 104 performs on / off control, direction control, or logic judgment on the power according to existing control strategies, and generates corresponding control signals. These control signals include, but are not limited to, start / stop control, interlocking signals, and status judgment signals, thereby ensuring that the load continues to operate according to the established control rules even under temporary power supply conditions.

[0027] The distribution panel cabinet 105 retains its original load connection structure, and its internal drawer compartments already have fixed electrical connections with the field equipment. This structure remains unchanged in this solution, thus avoiding the need to dismantle and rewire field cables. In this way, a backup power supply path can be quickly established without affecting the original system wiring.

[0028] The re-power supply drawer 107 is located within the distribution panel cabinet 105 and serves to establish a bridging channel for electrical energy and signals between the functional drawer 104 and the functional load 108. Its input receives electrical energy and control information output from the functional drawer 104 and transmits it to the load side via existing connection paths within the cabinet. Simultaneously, this unit also performs signal feedback, guiding status feedback (such as position status and operating status) from the load side back to the functional drawer 104, enabling the control unit 142 to perform closed-loop control based on the feedback information. The internal structure of the re-power supply drawer 107 is relatively simple, primarily used to transfer electrical energy and signal paths without interfering with the control logic, thus avoiding conflicts with the original control strategy.

[0029] As part of the workflow, when temporary power supply to a target circuit is required, the operator first removes the corresponding function drawer 104 from the original distribution panel cabinet 105 and inserts it into the corresponding drawer compartment of the standby distribution panel 102, making the function drawer 104 operational in the standby distribution panel 102. Then, the power supply drawer 107 is inserted into the second drawer compartment 106 of the original distribution panel cabinet 105 corresponding to the target circuit, and the interface between the standby distribution panel 102 and the power supply drawer 107 is connected via a dedicated connecting cable, thereby establishing a transmission channel for electrical energy and control signals.

[0030] After the above connections are completed, an external power source (e.g., AC power or UPS uninterruptible power supply) is connected to the system and begins supplying power. At this time, the electrical energy first enters the standby distribution panel 102, and the functional drawer 104 plugged into it controls and processes the electrical energy, including on / off control and protection processing. The processed electrical energy is transmitted to the repower drawer 107 through the connecting cable. Inside the repower drawer 107, after passing only through the main circuit protection device, it is introduced into the existing connection path of the original distribution panel cabinet 105, and finally delivered to the downstream load through the outgoing terminals inside the cabinet.

[0031] Through the above process, an independent temporary power supply path is constructed without changing the original load wiring structure, enabling controlled power supply to the target load even when the main power supply of the distribution panel is unavailable. This implementation method fully utilizes the control capabilities of the original functional drawers and the connection structure of the original distribution panel, achieving coordinated restoration of power supply and control functions. It features simple operation, reliable connection, and high safety.

[0032] Based on the above structure, this embodiment can maintain the controllable operation of the functional load 108 even when the original distribution panel loses power. Compared with temporary power supply methods that only provide power, this solution not only restores the load's power supply capability, but also restores the transmission channels for control signals and feedback signals, enabling the load to operate according to the existing control logic, thereby avoiding problems such as malfunctions and loss of control.

[0033] Furthermore, by directly utilizing the original distribution panel's connection structure, there is no need to disconnect or reconnect cables on-site, significantly reducing operational complexity and the risk of human error in wiring. Simultaneously, by rationally separating the control unit 142 from the power supply channel, the integrity of the control logic is ensured, while system safety and adaptability are improved. This technical solution achieves integrated restoration of temporary power supply and control functions while ensuring safety, demonstrating significant engineering application value.

[0034] As one implementation method, such as Figure 2 As shown, the side wall of the first drawer compartment 103 is provided with an AC power input socket 131, a first AC power output socket 132, a DC power input socket 133 and a first control signal output socket 134. The AC power input socket 131 and the DC power input socket 133 are respectively connected to the backup power module 101, and the first AC power output socket 132 and the first control signal output socket 134 are respectively connected to the rechargeable drawer 107.

[0035] Multiple interfaces are provided on the side wall of the first drawer compartment 103 to complete the distribution and transfer of electrical energy and control information between different units, thereby constructing a stable and clear power supply and control channel.

[0036] Specifically, the AC power input socket 131 provided on the side wall is used to receive three-phase AC power from the backup power supply side. This interface serves as the entrance to the main power channel, introducing external power into the drawer compartment so that the subsequently connected functional drawer 104 can obtain a stable power supply, thereby performing start-stop or operation control of the load.

[0037] The DC power input interface is mainly used to introduce auxiliary control power. This type of power supply is typically used to drive coils, logic units, or signal processing units in the control circuit. By setting a separate DC input path, the control power supply and the power supply can be supplied separately, thereby improving the system's stability and anti-interference capability under complex operating conditions.

[0038] The first AC power output interface is used to draw out the electrical energy controlled by the functional drawer 104 and transmit it to the subsequent unit. This interface sends the power to the re-supply path, so that the power output to the load side conforms to the predetermined control strategy.

[0039] Meanwhile, the first control signal output interface is used to transmit control information, including start / stop commands, logic interlock signals, and status-related information. Through this interface, the control results generated within the functional drawer 104 can be sent to the repower channel, thereby achieving control behavior consistent with the original system on the load side. Furthermore, this signal channel can also be used for subsequent feedback information exchange to support the system in forming a complete control loop. Through the combined configuration of the above interfaces, the first drawer compartment 103 not only realizes the introduction and output of electrical energy but also completes the synchronous transmission of control information, enabling the functional drawer 104 to maintain its original control capabilities even under temporary power supply conditions.

[0040] By integrating multiple types of interfaces on the side wall of the drawer compartment, separate channel management of power and control signals is achieved. This ensures that the load receives a stable power supply during temporary power supply, while simultaneously transmitting control and feedback information, thereby restoring the original control logic and improving the safety and reliability of system operation.

[0041] As one implementation method, such as Figure 3 As shown, when the function drawer 104 is inserted into the first drawer compartment 103, the function drawer 104 is connected to the AC power input socket 131, the first AC power output socket 132, the DC power input socket 133 and the first control signal output socket 134 respectively. The functional drawer 104 is used to receive AC power through the AC power input socket 131, output AC power through the first AC power output socket 132, receive DC power through the DC power input socket 133, and transmit control signals and feedback signals through the first control signal output socket 134.

[0042] When the functional drawer 104 is pushed into the first drawer compartment 103 and is in the working position, it forms a corresponding cooperation with various interfaces provided on the side wall of the compartment, thereby establishing a complete transmission channel for power energy and control information.

[0043] Specifically, after the functional drawer 104 is inserted into the first drawer compartment 103, its electrical contacts establish a conductive connection with the AC power input interface inside the compartment to introduce externally supplied power. This power enters the functional drawer 104 and is processed by the control elements inside the drawer, such as implementing on / off control or direction control according to control logic to meet the load's operating requirements.

[0044] Simultaneously, the functional drawer 104 is also connected to the first AC power output socket 132 to draw out and transfer electrical energy to the subsequent unit. The electrical energy output through this path already has controllable properties and can be directly used to drive the load-side equipment in the subsequent power supply link.

[0045] Regarding the control power supply, the functional drawer 104 obtains auxiliary power through connection with the DC power input socket 133. This auxiliary power supply is mainly used to maintain the normal operation of the control circuit inside the drawer, such as driving relays, contactor coils or logic control unit 142, so as to ensure that the control system still has stable working capability under temporary power supply conditions.

[0046] Furthermore, the functional drawer 104, through its connection with the first control signal output socket 134, enables the transmission of control and feedback information. The functional drawer 104 can send control commands to the downstream power supply unit and simultaneously receive status information from the load side, such as operating status or position feedback. Based on this feedback information, the functional drawer 104 can adjust the control strategy accordingly, thereby forming a closed-loop control process.

[0047] Through the above connection, the functional drawer 104 in this structure plays both the role of power control and the role of control information processing and interaction, so that it can maintain the control characteristics of the original system in the standby power supply state.

[0048] By establishing a dual-channel connection between power and control information in the drawer-plugged state, the functional drawer 104 can still effectively control the load under temporary power supply conditions and has feedback regulation capability, thereby improving the continuity, stability and safety of system operation.

[0049] As one implementation method, such as Figure 4 As shown, the backup power distribution panel 102 also includes an AC power busbar 135 and a DC power busbar 136. The AC power busbar 135 is connected to the backup power module 101 and the AC power input socket 131, respectively, and the DC power busbar 136 is connected to the backup power module 101 and the DC power input socket 133, respectively.

[0050] The backup distribution panel 102 is equipped with two types of bus structures, AC and DC, to form a unified power distribution channel inside the equipment to meet the power supply needs of different types of power-consuming units.

[0051] Specifically, the AC power busbar 135 serves as a channel for collecting and distributing electrical energy. One end is electrically connected to the backup power supply side to receive three-phase AC power supplied externally; the other end is connected to the AC output interface located on the side wall of the drawer compartment, thereby transmitting electrical energy to the functional drawers 104 plugged into the compartment. This structure allows for unified distribution of AC power within the distribution panel, enabling each functional drawer 104 to directly obtain a stable power supply after connection, eliminating the need for separate wiring.

[0052] The DC power bus 136 is used for centralized distribution of auxiliary control power. It is also connected to the backup power supply side to introduce DC power for control and, through connection with the DC output interface, transfers this power to the function drawer 104. This DC power supply is mainly used to maintain the operation of the control loop, such as driving control coils or logic processing units, thereby ensuring the continuity of control functions under temporary power supply conditions.

[0053] By setting up an AC and DC dual bus structure inside the backup distribution panel 102, the centralized distribution and separate channel supply of power and control power are realized, so that the functional drawer 104 can obtain a stable power input and maintain the normal operation of the control circuit in the temporary power supply state, thereby improving the power supply reliability and control stability of the system.

[0054] As one implementation method, such as Figure 5 As shown, the functional drawer 104 includes a power output unit 141 and a control unit 142. The power output unit 141 is connected to the AC power input socket 131 and the first AC power output socket 132 respectively. The control unit 142 is connected to the DC power input socket 133, the first control signal output socket 134 and the power output unit 141 respectively. The control unit 142 controls the power output unit 141 to output AC power and output control signals, and receives feedback signals, and controls the power output unit 141 to switch on and off according to the feedback signals.

[0055] The power output unit 141 primarily handles the transmission and execution of electrical energy. Externally supplied AC power first enters this unit, where it is switched on and off according to control commands before being sent to the subsequent interface and finally delivered to the load side. The control unit 142 is used to determine the system's operating status and generate control strategies. This unit maintains its operation by acquiring auxiliary DC power and receives status information from the load side, such as operating status or position signals. Based on this, the control unit 142 processes the collected information and generates corresponding control commands. On one hand, these control commands are used to drive the power output unit 141 to turn on or off, thereby regulating the electrical energy output status; on the other hand, the control unit 142 can also send control information externally for coordinated control by other units or systems.

[0056] Furthermore, there is a linkage between the control unit 142 and the power output unit 141. That is, the control unit 142 adjusts the power path in real time based on the received feedback information, enabling the system to dynamically respond to changes in load status. For example, when the load is detected to have reached a predetermined state or an abnormality occurs, the power output status can be adjusted in a timely manner to avoid unnecessary energy transfer or potential risks.

[0057] This embodiment separates power transmission from control logic and establishes a linkage between the two, enabling the functional drawer 104 to still have precise control over the load under temporary power supply conditions. At the same time, it can dynamically adjust the power output state based on feedback information, thereby improving the system's safety, reliability, and control stability.

[0058] As one embodiment of the repower drawer 107, such as Figure 6 As shown, the repower drawer 107 includes an inlet unit 201, a switch unit 202, and an outlet unit 203; The cable entry unit 201 includes a first cable entry plug 221 and a second cable entry plug 222. The first cable entry plug 221 and the second cable entry plug 222 are respectively connected to the function drawer 104. The first cable entry plug 221 is connected to the first end of the switch unit 202, and the second cable entry plug 222 is connected to the second end of the switch unit 202. The outgoing unit 203 includes a third outgoing plug 231 and a fourth outgoing plug 232. The third outgoing plug 231 is connected to the third end of the switch unit 202, and the fourth outgoing plug 232 is connected to the fourth end of the switch unit 202. The first inlet plug 221 and the third outlet plug are used to transmit electrical signals, while the second inlet plug 222 and the fourth outlet plug 232 are used to transmit control signals and feedback signals. The switching unit 202 is used to control the connection and disconnection between the first inlet plug 221 and the third outlet plug 231, and to control the connection and disconnection between the second inlet plug 222 and the fourth outlet plug 232.

[0059] The repower drawer 107 is arranged separately for power and signal paths, and consists of a front-end access component, a middle on / off control component, and a back-end output component, thereby realizing reliable transfer of power and control information between different interfaces.

[0060] On the access side, two types of plug-in interfaces are provided. One type is used to receive main power electrical energy, and the other type is used to receive control and status-related signals. Electrical energy from functional drawer 104 is introduced into the drawer through the power interface and further sent to the on / off control component in the middle. At the same time, control commands and status data enter the corresponding signal channels through the other interface for subsequent forwarding or feedback.

[0061] In the central area, a component for on / off control is installed, managing two types of channels separately. On one hand, it acts as a connection or isolation mechanism in the power path, allowing electrical energy entering the drawer to be switched on or off as needed. On the other hand, in the signal path, this component controls the connectivity of control and feedback information, establishing or interrupting the signal path when necessary, thus ensuring the flexibility and safety of system operation. This structure makes both the power and signal paths controllable.

[0062] On the output side, corresponding interfaces are provided to cooperate with the existing connection structure inside the distribution panel cabinet 105. One type of interface is used to send out the electrical energy that has been controlled by switching on and off to drive the subsequent load; the other type of interface is used to transmit control information and status feedback from the load side, so that this information can form a round-trip channel between the functional drawer 104 and the load. Through this output structure, the wiring relationship in the original distribution panel can be directly used to transmit electrical energy and signals to the field equipment, while the equipment operating status is returned to the control terminal.

[0063] By setting and controlling the switching of the power path and the signal path respectively, the power supply drawer 107 can not only realize the safe transmission of power, but also simultaneously complete the interaction of control information and feedback information, thereby maintaining the control function of the original system in the standby power supply state and improving the overall safety and reliability of operation.

[0064] As another implementation of the repower drawer 107, such as Figure 7 As shown, the repower drawer 107 includes an inlet unit 201, a switch unit 202, and an outlet unit 203; The cable entry unit 201 includes a first cable entry plug 221 and a second cable entry plug 222. The first cable entry plug 221 and the second cable entry plug 222 are respectively connected to the function drawer 104. The first cable entry plug 221 is connected to the first end of the switch unit 202. The outgoing unit 203 includes a third outgoing plug 231 and a fourth outgoing plug 232. The third outgoing plug 231 is connected to the second end of the switch unit 202, and the fourth outgoing plug 232 is connected to the second incoming plug 222. The first inlet plug 221 and the third outlet plug are used to transmit electrical signals, while the second inlet plug 222 and the fourth outlet plug 232 are used to transmit control signals and feedback signals. The switching unit 202 is used to control the connection and disconnection between the first incoming plug 221 and the third outgoing plug 231.

[0065] In this embodiment, the internal structure of the repower drawer 107 has been simplified and adjusted compared to the above embodiment, mainly in the different processing methods of the signal path and the power path.

[0066] In the above embodiments, the power supply drawer 107 has on / off control structures for both the power channel and the control signal channel. That is, both the power path and the signal path can be uniformly managed by the control unit 142, thereby realizing synchronous or independent control of the two types of channels. In this embodiment, however, the on / off control structure is only set on the power transmission path, while the transmission paths of control signals and feedback information are processed by direct connection.

[0067] Specifically, in this embodiment, the power from the functional drawer 104 is still introduced through the corresponding input interface, and is controlled to be switched on or off by the internal on / off control structure, before being sent to the load side through the output interface. In contrast, control information and feedback information in this embodiment no longer pass through the on / off control structure, but instead form a direct path through an independent interface, ensuring continuous signal interaction between the functional drawer 104 and the load. That is, control commands can be transmitted to the load side in real time, and the load's status information can be returned to the functional drawer 104 immediately, thereby avoiding control delays or information loss caused by the signal path being cut off.

[0068] Compared with the above implementation, this implementation improves the real-time performance and reliability of control and feedback information by setting the control signal path to a direct connection structure, while ensuring the controllable transmission of power energy. At the same time, it simplifies the internal structure, which is conducive to improving system stability and reducing implementation costs.

[0069] As one implementation method, such as Figure 8 As shown, the second drawer compartment 106 is provided with a second AC power output socket 161 and a second control signal output socket 162 on its side wall. The second AC power output socket 161 is connected to the power input terminal of the third cable plug 231 and the functional load 108, respectively. The second control signal output socket is connected to the control terminal of the fourth cable plug 232 and the functional load 108, respectively.

[0070] The second drawer compartment 106 has a pre-installed interface structure on its side wall for connecting to the functional load 108, including a second AC power output socket 161 and a second control signal output socket 162. These interfaces are part of the original configuration of the distribution panel cabinet 105 and are used to connect the drawer and the functional load 108 for power and control information during normal operation. In this embodiment, their structure is not modified but reused.

[0071] Specifically, the second AC power output socket 161 serves as an existing output channel for power. After the repower drawer 107 is inserted into the second drawer compartment 106, it forms a corresponding connection with the power output terminal of the repower drawer 107, so that the power from the backup power supply path can be transmitted to the power input terminal of the functional load 108 through this existing interface, thereby maintaining the operating capability of the load.

[0072] The second control signal output socket 162 serves as an existing interactive channel for control information, enabling bidirectional transmission of control commands and feedback information. In this embodiment, the signal output terminal of the power supply drawer 107 is connected to this interface, allowing control signals from the functional drawer 104 to be transmitted to the functional load 108 through the existing channel. Simultaneously, the operating status information generated by the functional load 108 can also be returned to the functional drawer 104 through this channel, thereby maintaining the integrity of the control loop.

[0073] This implementation method reuses the existing load connection interfaces in the original distribution panel, enabling rapid access to the backup power supply path without changing the original wiring structure. At the same time, it ensures the normal transmission of control signals and feedback signals, reduces the complexity of the modification, and improves the system's safety and implementation efficiency.

[0074] In one implementation, both the first incoming plug 221 and the second incoming plug 222 are aviation plugs.

[0075] The input interface of the repower drawer 107 adopts an aviation connector to improve the reliability of electrical connections and the convenience of field operation.

[0076] Specifically, this type of connector has multiple independent conductive contacts inside, allowing multiple wires to be introduced simultaneously. The connector used to carry electrical power can be configured with a three-phase conductive channel, enabling three-phase AC power from the backup power supply to be simultaneously connected to the device and transmitted according to the respective three-phase power supply paths. This multi-core structure design allows multiple power lines to be connected in a single interface, avoiding the complexity of distributed wiring.

[0077] Meanwhile, aviation connectors typically possess robust mechanical locking structures, ensuring a stable connection after mating and preventing poor contact due to vibration or external forces. Furthermore, their housings offer insulation and protection, helping to minimize the impact of the external environment on the electrical connection.

[0078] For the transmission of control and feedback information, another type of connector can adopt a multi-core signal interface to carry multiple control signals and status feedback signals, thereby realizing centralized access and output of control information.

[0079] By using multi-core aviation connectors as input interfaces, centralized access to three-phase power and multiple signals is achieved, improving the standardization and reliability of wiring, while simplifying the on-site operation process and reducing the risk of wiring errors.

[0080] As a specific structure of the repowered drawer, such as Figures 9 to 11 As shown, the repower drawer 107 adopts the same shape and installation dimensions as the original distribution panel drawer, so that it can be directly inserted into the drawer compartment of the original distribution panel and matched with the electrical interface inside the cabinet, thereby completing the reconstruction of the power supply path without changing the original cabinet structure.

[0081] On the input side, the front panel of the repower drawer 107 is provided with connection interfaces for power and signal input, including a first input plug 221 and a second input plug 222. This interface is connected to the backup distribution panel 102 via a multi-pin connector, allowing power from the temporary power supply system and control-related information to be simultaneously introduced into the drawer. The power is used to supply power to subsequent loads, while the control information is used to establish a signal interaction channel between the functional drawer and the load.

[0082] In terms of internal structure, the repower drawer 107 adopts a simplified design, retaining only essential electrical protection components. Specifically, it houses a switch unit 202, which contains a main circuit protection device 223. This device isolates or disconnects the power path in case of abnormalities, thus achieving basic short-circuit protection and safety isolation functions. Apart from this protection component, no other control devices are installed inside the drawer, preventing them from participating in control logic processing and avoiding interference or conflict with existing control logic within the functional drawers.

[0083] On the output side, the rear of the repower drawer 107 is equipped with an electrical connection interface that matches the distribution panel cabinet. The third outgoing connector 231 is used to output processed power to the existing load connection path within the cabinet, thereby driving downstream equipment. The fourth outgoing connector 232 is used to transmit control information and receive feedback signals from the load side, such as location information or operating status information. Through this interface structure, the repower drawer can directly utilize the existing connections within the cabinet to transmit power and signals to the field load, while simultaneously returning the load status to the upstream control unit.

[0084] With the above structural configuration, the power supply drawer 107 mainly serves as a switch between the power path and the signal path in the whole system. Its structure is simple and its function is clear. It does not participate in complex control calculations, thereby ensuring the stability and reliability of the system in the standby power supply state.

[0085] Based on the shortcomings of the existing technology and in conjunction with the above-described embodiments, the solution proposed in this application is as follows: In current electrical maintenance work, when the distribution panel busbar is under maintenance or experiencing a power outage, temporary operation is typically achieved by disconnecting the downstream cable and connecting to a temporary power source, or by supplying power to the load through a general temporary power supply switch. However, these methods generally only establish a simple power supply path and have significant drawbacks.

[0086] First, the existing solution only has a primary power path and lacks a control signal interface that matches the original system. This results in the load being unable to obtain complete control commands and feedback information during operation, leaving the equipment in a state of no control or weak control.

[0087] To address this issue, this application restores the complete control loop by transferring the original functional drawer to the standby distribution panel and establishing a signal transmission path through the repowered drawer, enabling the synchronous transmission of electrical energy and control signals.

[0088] Secondly, existing temporary power supply methods are prone to phase sequence errors during wiring, which can lead to problems such as motor reversal. This can cause serious mechanical damage, especially to equipment that is sensitive to the direction of operation, such as electric valves.

[0089] In response, this application utilizes the control structure of the original functional drawer to process electrical energy, ensuring that the electrical energy output still follows the phase sequence logic of the original system, thereby avoiding phase sequence abnormalities caused by external wiring.

[0090] Furthermore, traditional temporary power supply devices are usually only equipped with basic power supply components and lack the protection functions of the original system, such as overload protection, short circuit protection and interlocking control, which poses a significant safety hazard.

[0091] This application improves the overall system security by retaining the original function drawer's role in the power supply path, allowing its internal protection logic to continue to function, and by setting necessary protection units in the repower supply path.

[0092] Furthermore, the existing solution cannot realize the secondary control functions in the original system, such as torque switches, limit switches and interlocking logic, resulting in a lack of necessary control constraints during equipment operation and increasing the risk of misoperation.

[0093] This application constructs a complete signal path, enabling the aforementioned control functions to operate normally even under temporary power supply conditions, thereby ensuring the consistency of the control logic.

[0094] Meanwhile, the traditional method requires frequent disassembly and reconnection of cables, which is cumbersome, error-prone, and not conducive to standardized on-site operations.

[0095] This application adopts a modular drawer structure and a standard interface connection method, which can complete the system construction through plug-in operation, significantly reducing wiring complexity and improving work efficiency.

[0096] Finally, existing technologies cannot simulate the control logic in a real operating environment, making it difficult to meet the needs of debugging and complex operations.

[0097] This application fully inherits the original control structure, ensuring that the operating logic under temporary power supply conditions remains consistent with that under normal conditions, thereby meeting the requirements for debugging and operation.

[0098] In summary, this application, by reconstructing the power supply path and reusing the original control unit, achieves complete restoration of control signals, protection functions, and operating logic while ensuring power supply capacity, thereby effectively overcoming many shortcomings of the prior art.

[0099] In combination with the above embodiments, the advantages and beneficial effects of the technology of this application compared with the prior art are as follows: Firstly, regarding operational safety, this application reuses the functional drawers in the original distribution panel as the control core. This ensures that electrical energy still passes through the original control circuit before being output to the load, thus maintaining the existing phase sequence and protection settings. Since the control logic remains unchanged, even with different external power sources, downstream motor equipment can still operate in the predetermined direction, avoiding reverse rotation caused by incorrect phase sequence and fundamentally reducing the risk of equipment damage.

[0100] Secondly, regarding operational safety, this application employs standardized interfaces for electrical connections, using plug-in connections to complete the access and transmission of electrical energy and signals. This method avoids the on-site stripping, wiring, and crimping of terminals required in traditional temporary power supply processes, effectively reducing exposed live points, lowering the risk of electric shock and wiring errors, and making the entire operation process safer and more reliable.

[0101] Furthermore, regarding control functions, this application establishes a backup power supply path while simultaneously retaining the control signal channels of the original system, ensuring that the control logic in the functional drawer can function fully. This structure enables the normal acquisition and processing of feedback signals from torque switches, limit switches, and other devices, thereby ensuring that the equipment operates in a consistent manner under temporary power supply conditions as under normal operating conditions, avoiding control failures or logic omissions.

[0102] Furthermore, in terms of adaptability and efficiency, this application utilizes a standardized drawer interface structure to enable the standby distribution panel 102 to be compatible with various functional drawers. Combined with the standardized design of the repower drawer, it allows for rapid switching between different load circuits without requiring specific modifications to any particular equipment, thereby significantly reducing preparation time and improving the efficiency of maintenance and commissioning.

[0103] In summary, the technical solution of this application achieves coordinated restoration of temporary power supply and control functions while ensuring system safety, which not only improves the reliability of equipment operation, but also effectively enhances on-site operation efficiency and standardization.

[0104] The low-voltage switchboard backup power supply device provided in this application can be applied to the operation and maintenance scenarios of low-voltage power distribution systems in various power plants under nuclear power groups, and is especially suitable for equipment maintenance, system debugging and operation isolation.

[0105] Specifically, during a unit overhaul, when a section of the busbar needs to be de-energized for maintenance, some downstream process equipment still requires necessary operations, such as opening and closing electric valves, system isolation, or charging and discharging of media. This implementation method constructs an independent backup power supply path, enabling relevant loads to still receive controlled power even when the busbar is de-energized, thereby ensuring the continuity of process operations.

[0106] When a fault occurs in a switchboard drawer and needs to be troubleshooted, this implementation method can provide an independent power supply and control environment for the target circuit without interfering with the normal operation of other circuits. This allows for individual testing and verification of the faulty drawer or related equipment, avoiding any impact on the overall system operation.

[0107] When the entire distribution panel is out of service for maintenance, some field equipment may still require functional verification or debugging. This implementation method can provide temporary power to downstream loads, allowing maintenance personnel to complete equipment debugging without relying on the original power distribution system, thereby improving the flexibility and efficiency of maintenance work.

[0108] Furthermore, during the commissioning phase of a newly built unit, when the formal power supply system is not yet in use, this implementation method can be used to conduct pre-operation tests on individual equipment. By introducing temporary power supply and control paths, the equipment functions and control logic can be verified in an early stage, providing a guarantee for the subsequent system commissioning.

[0109] By providing independent and controllable power supply and control capabilities in various operation and maintenance scenarios, this implementation method can meet the continuous operation and debugging needs of critical loads without affecting the original system structure, thereby improving the system's operational flexibility, safety, and maintenance efficiency.

[0110] The application of the low-voltage switchboard backup power supply device provided in this application in the operation and maintenance system of nuclear power plants can significantly improve production efficiency and optimize work quality, specifically in the following aspects: Firstly, during unit overhauls, when the switchboard is out of service for maintenance, some critical operations, traditionally, can only be performed after power is restored, easily creating a schedule bottleneck. This implementation method provides an independent, controlled power supply path, enabling operators to remotely operate critical equipment such as electric valves even during bus power outages. This allows for earlier completion of system isolation and related test preparations, effectively reducing critical path time.

[0111] Secondly, in daily operation and maintenance, this implementation method centralizes the control of related loads within the power distribution room. Operators can achieve unified control of multiple electric actuators without having to manually operate them at the equipment location, reducing on-site travel, improving operational response speed, thereby enhancing overall work efficiency and positively impacting the shortening of maintenance cycles.

[0112] Furthermore, regarding equipment safety, by retaining the original control logic and avoiding power supply phase sequence errors, this implementation method can prevent abnormal operating states of the electric actuator, thereby reducing the risk of mechanical damage caused by malfunctions. For high-value equipment, it can especially effectively reduce structural damage caused by improper power supply and improve equipment operational reliability.

[0113] Furthermore, regarding operational standardization, this implementation method transforms the traditional temporary wiring operation, which relies on manual experience, into a standardized module plug-in and connection process. By reducing manual wiring steps, it not only lowers operational complexity but also reduces the possibility of incorrect wiring and operational errors, making the maintenance process more in line with standardized and process-oriented management requirements, thereby improving the overall safety level and work quality.

[0114] By providing efficient and reliable backup power supply and control measures during critical operation and maintenance, this implementation method can improve operational efficiency, shorten operation cycles, and reduce the risk of human error while ensuring equipment safety, thereby significantly improving the efficiency of power plant production organization and operational safety.

[0115] Example 2 A second aspect of the present invention provides a power supply system, including a low-voltage distribution panel backup power supply device and a functional load as provided in the first embodiment.

[0116] Under normal operating conditions, the power distribution system supplies power to each functional load via the main power supply circuit. When the distribution panel busbar is under maintenance or experiencing a power outage, an independent power supply and control path is established through the backup power supply device. This ensures that the functional loads can still receive controlled power and remain operational even when the main power supply is unavailable. Specifically, the backup power supply device is used to introduce external power and, after processing by the functional drawer, deliver it to the load side without altering the original power distribution system structure or load wiring relationships. It also enables the transmission of control and feedback signals, thereby maintaining the system's control closed loop. By integrating this backup power supply device into the power distribution system of a megawatt-class nuclear power plant, the operational continuity and safety of critical equipment can be guaranteed during overhauls, commissioning, or fault handling, improving the reliability and operational flexibility of the power distribution system.

[0117] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A backup power supply device for a low-voltage switchboard, wherein the backup power supply device for the low-voltage switchboard is connected to a functional load, characterized in that, include: Backup power module, used to provide working power; A backup power distribution panel is connected to the backup power module. The backup power distribution panel is provided with a first drawer compartment for inserting a functional drawer. The functional drawer is used to output electrical signals and control signals. The distribution panel cabinet has a second drawer compartment, which is connected to the functional load via a line. The second drawer compartment is used to plug in a repower drawer, which is electrically connected to the functional drawer. The repower drawer is used to output the electrical signal and the control signal to the functional load, and to receive the feedback signal sent by the functional load and output the feedback signal to the functional drawer.

2. The low-voltage switchboard backup power supply device as described in claim 1, characterized in that, The side wall of the first drawer compartment is provided with an AC power input socket, a first AC power output socket, a DC power input socket, and a first control signal output socket. The AC power input socket and the DC power input socket are respectively connected to the backup power module, and the first AC power output socket and the first control signal output socket are respectively connected to the rechargeable drawer.

3. The low-voltage switchboard backup power supply device as described in claim 2, characterized in that, When the functional drawer is inserted into the first drawer compartment, the functional drawer is connected to the AC power input socket, the first AC power output socket, the DC power input socket, and the first control signal output socket, respectively. The functional drawer is used to receive AC power through the AC power input socket, output AC power through the first AC power output socket, receive DC power through the DC power input socket, and transmit control signals and feedback signals through the first control signal output socket.

4. The low-voltage distribution panel backup power supply device as described in claim 2, characterized in that, The backup power distribution panel also includes an AC power busbar and a DC power busbar. The AC power busbar is connected to the backup power module and the AC power input socket, respectively, and the DC power busbar is connected to the backup power module and the DC power input socket, respectively.

5. The low-voltage switchboard backup power supply device as described in claim 3, characterized in that, The functional drawer includes a power output unit and a control unit. The power output unit is connected to the AC power input socket and the first AC power output socket, respectively. The control unit is connected to the DC power input socket, the first control signal output socket, and the power output unit, respectively. The control unit controls the power output unit to output AC power and outputs control signals, and receives feedback signals, and controls the power output unit to switch on and off according to the feedback signals.

6. The low-voltage switchboard backup power supply device as described in claim 1, characterized in that, The power supply drawer includes an inlet unit, a switch unit, and an outlet unit; The cable entry unit includes a first cable entry plug and a second cable entry plug. The first cable entry plug and the second cable entry plug are respectively connected to the function drawer. The first cable entry plug is connected to the first end of the switch unit, and the second cable entry plug is connected to the second end of the switch unit. The outgoing unit includes a third outgoing plug and a fourth outgoing plug. The third outgoing plug is connected to the third terminal of the switch unit, and the fourth outgoing plug is connected to the fourth terminal of the switch unit. The first inlet plug and the third outlet plug are used to transmit electrical signals, and the second inlet plug and the fourth outlet plug are used to transmit control signals and feedback signals. The switching unit is used to control the connection between the first incoming plug and the third outgoing plug, and to control the connection between the second incoming plug and the fourth outgoing plug.

7. The low-voltage switchboard backup power supply device as described in claim 1, characterized in that, The power supply drawer includes an inlet unit, a switch unit, and an outlet unit; The cable inlet unit includes a first cable inlet plug and a second cable inlet plug, the first cable inlet plug and the second cable inlet plug are respectively connected to the function drawer, and the first cable inlet plug is connected to the first end of the switch unit; The outgoing unit includes a third outgoing plug and a fourth outgoing plug. The third outgoing plug is connected to the second end of the switch unit, and the fourth outgoing plug is connected to the second incoming plug. The first inlet plug and the third outlet plug are used to transmit electrical signals, and the second inlet plug and the fourth outlet plug are used to transmit control signals and feedback signals. The switching unit is used to control the connection between the first incoming plug and the third outgoing plug.

8. The low-voltage switchboard backup power supply device as described in claim 6 or 7, characterized in that, The second drawer compartment is provided with a second AC power output socket and a second control signal output socket on its side wall. The second AC power output socket is connected to the power input terminal of the third cable outlet and the functional load, respectively. The second control signal output socket is connected to the control terminal of the fourth cable outlet and the functional load, respectively.

9. The low-voltage switchboard backup power supply device as described in claim 7, characterized in that, Both the first and second incoming line plugs are aviation plugs.

10. A power regeneration system, characterized in that, Includes the low-voltage switchboard backup power supply device and functional load as described in any one of claims 1 to 9.

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