An intelligent fee control management method and system for low-voltage large-capacity users

Abstract

This invention provides an intelligent prepaid management method and system for low-voltage, high-capacity users, belonging to the field of electricity meter equipment technology. The invention includes a housing and an internal partition within the housing, which divides the internal space into an inlet chamber, a metering chamber, and an outlet chamber. These chambers are physically isolated from each other through sealed wiring holes. The metering chamber houses the electricity meter and connectors, with the meter installed via plug-in connectors. The outlet chamber houses an automatic reclosing circuit breaker matched to the user's capacity, whose control terminal is connected to the electricity meter's tripping circuit. This invention, through its three-chamber physical isolation structure, effectively prevents accidental contact with live parts, arc interference, and meter sleight of hand for electricity theft, improving electrical safety and anti-theft capabilities. The connectors enable rapid meter installation, reducing maintenance costs. The external automatic reclosing circuit breaker, linked to the electricity meter, enables remote automatic tripping and closing, as well as dual-mode power restoration control for high-capacity users, significantly improving prepaid management efficiency and system reliability.

Description

Technical Field

[0001] This invention relates to the field of electricity meter technology, and in particular to an intelligent prepaid management method and system for low-voltage, high-capacity users. Background Technology

[0002] Electricity meter boxes are specialized enclosures used to install and protect electricity metering equipment. Widely used in power supply systems, their primary function is to measure the electrical energy consumed by users, providing power companies with fundamental data for electricity billing and management. With the deepening implementation of policies to improve "access to electricity" services, users with capacities of 160kW and below have fully adopted low-voltage access methods. Among these, the number of low-voltage, high-capacity users exceeding 66kW (corresponding to a maximum current exceeding 100A) is showing a rapid growth trend.

[0003] Currently, conventional meter boxes are primarily designed for ordinary low-voltage users in terms of structure and function, making it difficult to meet the needs of low-voltage, high-capacity users. Specifically, existing technologies have the following main shortcomings: First, according to technical standards, the load switch built into the electricity meter is only suitable for current scenarios of 100A and below. For low-voltage, high-capacity users with a capacity exceeding 66kW, the load switch built into the electricity meter cannot meet their current carrying capacity, making it impossible to remotely trip or close the power supply to the user side directly through the electricity meter.

[0004] In practice, power supply departments still need to manually cut off power when users are in arrears and manually restore power after users pay. The whole process is time-consuming, which not only affects the efficiency of electricity fee collection but also reduces user satisfaction.

[0005] Secondly, the components inside existing meter boxes are usually arranged in the same chamber, lacking effective physical isolation measures. Both staff and users are at risk of accidentally touching live parts when performing inspections or operations.

[0006] Meanwhile, in high-capacity scenarios, the electric arc generated during the opening and closing of circuit breakers may interfere with sensitive equipment such as electricity meters, affecting metering accuracy and equipment reliability.

[0007] Secondly, most electricity meters in existing meter boxes use traditional wiring methods, which involve crimping wires with screws to achieve electrical connection. This method is cumbersome and time-consuming when installing new or replacing electricity meters, and wiring errors frequently occur in practice, increasing maintenance costs and safety hazards.

[0008] In summary, there is an urgent need to provide an intelligent prepaid management meter box that can meet the needs of low-voltage, high-capacity users, in order to solve the technical problems of existing meter boxes when applied to low-voltage, high-capacity users, such as the inability to achieve remote automatic switching, insufficient electrical safety, and low operation and maintenance efficiency. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a "PS+TTD" phased array simultaneous reception multi-beamforming technology. Its core lies in innovating the traditional hardware architecture of "each beam corresponding to a set of phase shifters" into an architecture of "one set of phase shifters for beam scanning and multiple sets of fixed delay lines for multi-beamforming".

[0010] This technology decouples the two functions of "beam scanning" and "multi-beamforming," and utilizes sinusoidal space theory to enable a single adjustable phase shifter to achieve overall scanning of all received beams. The fixed pointing differences between beams are achieved by a low-cost, hardware-based fixed delay line (TTD). This method fundamentally solves the problems of numerous hardware components, complex control, and high costs in existing technologies.

[0011] To achieve the above objectives, this application proposes an intelligent prepaid management system for low-voltage, high-capacity users, comprising: shell; An internal partition is provided inside the outer shell, dividing the internal space of the outer shell into an inlet chamber, a metering chamber, and an outlet chamber. The inlet chamber, metering chamber, and outlet chamber are physically isolated from each other through pre-set sealed cable passage holes. An electricity meter is installed in the metering room; A connector is provided in the metering room, and the energy meter is installed and electrically connected via the connector; An automatic reclosing circuit breaker is installed in the outgoing line room. Its control terminal is connected to the tripping circuit of the energy meter via a connecting line to receive tripping or closing commands issued by the energy meter.

[0012] As a further solution, the internal partition is an SMC insulating partition; the sealed wire hole is provided with a silicone sealing ring or filled with flame-retardant sealant.

[0013] As a further solution, the incoming line compartment is used to house the incoming line terminals and the molded case circuit breaker, and the outgoing line compartment is used to house the outgoing line terminals and the automatic reclosing circuit breaker.

[0014] As a further solution, the automatic reclosing circuit breaker is an external circuit breaker that matches the user's capacity. Its auxiliary contacts are connected to the energy meter via signal lines to provide feedback to the energy meter on the circuit breaker's open or closed status.

[0015] As a further solution, the connection line between the automatic reclosing circuit breaker and the tripping circuit of the energy meter is hidden inside the panel of the meter box; and / or, the energy meter is installed in a one-time insertion manner through the connector, and the connector and the energy meter adopt an anti-misinsertion structure design.

[0016] As a further solution, a current transformer is also included, which is located in the incoming line compartment or metering compartment and electrically connected to the energy meter.

[0017] As a further solution, the electrical connections between the incoming components in the incoming line chamber and the metering chamber, and the execution unit in the outgoing line chamber, are all achieved through the sealed wire passage hole to prevent electricity theft by bypassing the metering unit.

[0018] On the other hand, the present invention also provides an intelligent prepayment management method for low-voltage, high-capacity users, which is applied to an intelligent prepayment management system for low-voltage, high-capacity users as described in any of the preceding claims, and includes the following steps: Step 1: The main station system monitors users' electricity balances in real time; Step 2: When a user's arrears meet the power outage policy, the master station system generates a trip command and transmits it to the energy meter; Step 3: The energy meter drives the automatic reclosing circuit breaker to open and cut off the power supply to the user according to the received trip command; Step 4: After the user pays the fee, the main station system performs a power restoration operation according to the preset power restoration mode: If it is the automatic power restoration mode, the main station system sends a closing command, and the energy meter drives the automatic reclosing circuit breaker to close automatically; if it is the safe power restoration mode, the main station system sends a closing permission signal, and the user manually operates the automatic reclosing circuit breaker to close.

[0019] As a further solution, after step three, the following is also included: after the automatic reclosing circuit breaker trips, its auxiliary contacts feed back the tripping status signal to the main station system via the energy meter to confirm the power outage.

[0020] As a further solution, after step four, the method further includes: after closing the circuit breaker, the auxiliary contact of the automatic reclosing circuit breaker feeds back the closing status signal to the main station system via the energy meter to confirm the restoration of power.

[0021] Compared with related technologies, the intelligent prepayment management method and system for low-voltage, high-capacity users provided by this invention has the following advantages: 1. This invention divides the meter box into an inlet chamber, a metering chamber, and an outlet chamber using internal partitions, achieving physical isolation between the three chambers. The chambers are connected only by pre-installed sealed wiring holes. This structural design effectively prevents the risk of workers or users accidentally touching live parts during inspection and operation. Simultaneously, it confines the electric arc generated by the circuit breaker's opening and closing to the outlet chamber, preventing interference with the energy meter in the metering chamber. This meets the insulation coordination requirements of GB / T 16935.1 and significantly improves the overall electrical safety of the meter box.

[0022] 2. Through the physical isolation structure between the incoming line compartment, metering compartment, and outgoing line compartment, coupled with the sealing design of the sealed wiring holes, the possibility of bypassing the metering device for electricity theft is physically eliminated. Any attempt to bypass the electricity meter requires damage to the partition or sealing structure, making it easy to detect and effectively improving the anti-theft capability.

[0023] 3. This invention incorporates connectors within the metering room, enabling the electricity meter to be electrically connected through a one-time plug-in installation, eliminating the need for screw crimping operations required in traditional wiring methods. This quick-installation plug-in design significantly reduces the time required for installing or replacing electricity meters, while also preventing metering failures or equipment damage caused by manual wiring errors, thus significantly reducing on-site maintenance costs and manpower input.

[0024] 4. This invention uses an automatic reclosing circuit breaker matched to the user's capacity as the actuating element. It is connected to the tripping circuit of the electricity meter via a connecting line, solving the technical problem that existing electricity meters' built-in load switches cannot meet current scenarios exceeding 100A. Through the linkage control between the master station system and the electricity meter, remote automatic tripping and closing operations for low-voltage, high-capacity users are realized, avoiding time delays and safety risks caused by manual on-site operation.

[0025] 5. The control method provided by this invention adopts a dual-mode power restoration control logic. In the automatic power restoration mode, after the user completes payment, the main station system directly sends a closing command, which drives the automatic reclosing circuit breaker to automatically close the circuit. The power restoration time is reduced from several hours in the traditional manual method to less than 10 minutes, which is more than 10 times faster. At the same time, the safe power restoration mode provides a manual closing option for special scenarios or users, taking into account both automation efficiency and on-site operation safety.

[0026] 6. In this invention, the automatic reclosing circuit breaker is equipped with auxiliary contacts, which are connected to the energy meter via signal lines. This allows the opening or closing status signal to be fed back to the master station system in real time via the energy meter, achieving closed-loop control and status confirmation of tripping and closing commands. The master station system can accurately determine whether the operation was successful based on the feedback status, avoiding misjudgments caused by operation failures and improving the reliability and traceability of the entire fee control system.

[0027] 7. This invention integrates the incoming line components, metering unit, and outgoing line execution unit into a single integrated meter box, which has a compact structure and is easy to install on site. Furthermore, the combination of the three-compartment isolation structure, quick-connect fittings, and external automatic circuit breaker allows for wider application in similar scenarios such as photovoltaic metering boxes, charging pile terminals, and distributed energy access boxes, demonstrating good versatility and widespread application value. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0030] Figure 1 This invention provides a schematic diagram of the structure of an intelligent prepayment management system for low-voltage, high-capacity users. Figure 2 This invention provides a schematic diagram of the steps of an intelligent prepaid management method for low-voltage, high-capacity users. The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] To address the technical problems of existing technologies when applied to low-voltage, high-capacity users, such as the inability to achieve remote automatic switching, insufficient electrical safety, and low operation and maintenance efficiency, this embodiment makes comprehensive improvements based on three aspects: At the structural level: the “three-room physical isolation” design (incoming line room, metering room, and outgoing line room) fundamentally solves the problems of electrical safety (prevention of accidental contact and prevention of electric arc) and electricity theft prevention in large-capacity scenarios, which is the basis for realizing other functions.

[0033] At the control level: For high-capacity users, the problem of insufficient capacity of built-in load switches is solved by linking the "external automatic reclosing circuit breaker" with the energy meter, realizing remote automatic tripping and closing. At the same time, a "dual-mode power restoration control logic" (automatic power restoration mode / safe power restoration mode) is proposed, which takes into account both automation efficiency and on-site operation safety.

[0034] From an operation and maintenance perspective: The "plug-and-play" capability of the electricity meter is achieved through "connectors," which solves the problems of long time consumption and easy errors in traditional wiring methods.

[0035] Please see Figure 1 This embodiment provides an intelligent prepayment management system for low-voltage, high-capacity users, including: shell; An internal partition is provided inside the outer shell, dividing the internal space of the outer shell into an inlet chamber, a metering chamber, and an outlet chamber. The inlet chamber, metering chamber, and outlet chamber are physically isolated from each other through pre-set sealed cable passage holes. An electricity meter is installed in the metering room; A connector is provided in the metering room, and the energy meter is installed and electrically connected via the connector; An automatic reclosing circuit breaker is installed in the outgoing line room. Its control terminal is connected to the tripping circuit of the energy meter via a connecting line to receive tripping or closing commands issued by the energy meter.

[0036] It should be noted that the core of this embodiment lies in solving safety and maintenance issues in large-capacity scenarios through physical isolation of the structure and reasonable layout of functional components. Specifically, the meter box uses internal partitions to divide the internal space of the outer shell into independent incoming line chambers, metering chambers, and outgoing line chambers. The chambers are connected by wires only through pre-set sealed wire passage holes, thus achieving electrical isolation from a physical structure. This not only prevents personnel from accidentally touching live parts, but also avoids the electric arc generated by the opening and closing of the circuit breaker in the outgoing line chamber from interfering with the electricity meter in the metering chamber. At the same time, it also eliminates the possibility of bypassing the metering device to steal electricity.

[0037] Building upon this, the metering room is equipped with connectors, enabling quick installation and connection of the electricity meter via plug-and-play, eliminating the need for traditional screw crimping and significantly simplifying the replacement or new installation process. Meanwhile, the automatic reclosing circuit breaker installed in the outgoing line room has its control terminal connected to the tripping circuit of the electricity meter via a connecting cable. This allows the electricity meter to remotely open and close the circuit breaker, matching the user's capacity, based on instructions from the main station system. This overcomes the limitation of existing electricity meters' built-in load switches, which cannot meet the needs of users with capacities exceeding 100A.

[0038] Furthermore, the internal partition is an SMC insulating partition; the sealed wire hole is provided with a silicone sealing ring or filled with flame-retardant sealant.

[0039] Specifically, the internal partition uses SMC insulating partition. SMC composite material has excellent insulation performance, flame retardant properties and mechanical strength, which can effectively ensure the electrical isolation effect between the incoming line compartment, metering compartment and outgoing line compartment, and meet the insulation coordination requirements under high voltage level. Even when the circuit breaker opens and closes and generates an arc or a short circuit fault occurs in the line, the partition can maintain structural integrity and prevent the fault from spreading to other compartments.

[0040] Meanwhile, the sealed cable passage is equipped with a silicone sealing ring or filled with flame-retardant sealant. This design serves two purposes: firstly, it flexibly secures the wires passing through the partition, preventing hard contact between the wires and the partition that could cause insulation wear; secondly, the silicone sealing ring or flame-retardant sealant provides excellent sealing performance, effectively preventing dust, moisture, or small animals from entering the metering chamber, ensuring a clean and reliable operating environment for the metering equipment. Furthermore, this sealing structure further enhances the anti-theft effect; any attempt to wire around the meter through the cable passage requires breaking the sealing structure, making it easily detectable by maintenance personnel.

[0041] Furthermore, the incoming line compartment is used to accommodate the incoming line terminals and the molded case circuit breaker, and the outgoing line compartment is used to accommodate the outgoing line terminals and the automatic reclosing circuit breaker.

[0042] Specifically, the incoming line compartment houses the incoming line terminals and the molded case circuit breaker. The incoming line terminals are responsible for introducing external power, while the molded case circuit breaker serves as the main protection switch on the incoming side, used to realize overload and short-circuit protection of the line. The outgoing line compartment houses the outgoing line terminals and the automatic reclosing circuit breaker. The outgoing line terminals are used to connect to the user-side load, while the automatic reclosing circuit breaker serves as an actuator, realizing the on / off control of power supply to the user according to the trip and close commands of the energy meter.

[0043] By confining the incoming line elements and outgoing line execution elements to separate incoming and outgoing line compartments, and physically isolating them from the intermediate metering compartment, this layout design further enhances the rationality of functional zoning.

[0044] On the one hand, the protection components on the incoming side and the execution components on the outgoing side do not interfere with each other, avoiding the risk of electrical coupling between components; on the other hand, confining the automatic reclosing circuit breaker to the outgoing compartment and keeping it physically isolated from the energy meter in the metering room effectively prevents the electric arc generated when the circuit breaker opens and closes from interfering with the energy meter. It also facilitates maintenance personnel to inspect or operate the outgoing side without power interruption, improving overall safety and maintenance convenience.

[0045] Furthermore, the automatic reclosing circuit breaker is an external circuit breaker that matches the user's capacity. Its auxiliary contacts are connected to the energy meter via signal lines to provide feedback to the energy meter on the circuit breaker's open or closed status.

[0046] Specifically, this automatic reclosing circuit breaker adopts an external circuit breaker that matches the user's capacity. This means that for low-voltage, high-capacity users with a capacity exceeding 66kW (corresponding to a current exceeding 100A), a large-specification circuit breaker that cannot be carried by the built-in load switch can be selected, thus solving the technical problem that the built-in switch of the existing energy meter has insufficient capacity and cannot achieve remote tripping and closing operations. At the same time, the circuit breaker is "external," installed independently of the energy meter in the outgoing line room, which not only facilitates flexible selection according to the user's actual capacity, but also avoids the complicated modification of the energy meter structure required by the built-in solution.

[0047] In addition, the automatic reclosing circuit breaker is equipped with an auxiliary contact, which is connected to the energy meter via a signal line. This auxiliary contact serves as a status feedback element for the circuit breaker, enabling it to collect the actual opening or closing status of the circuit breaker in real time and upload this status signal to the master station system via the energy meter. Through this feedback mechanism, the master station system can accurately confirm whether the tripping or closing command has been successfully executed, forming a closed-loop control link of "command issuance—operation execution—status feedback," avoiding misjudgments caused by execution failures, and effectively improving the reliability, traceability, and accuracy of remote operation and maintenance of the fee control system.

[0048] Furthermore, the connection line between the automatic reclosing circuit breaker and the tripping circuit of the energy meter is hidden inside the panel of the meter box; and / or, the energy meter is installed in a one-time insertion manner through the connector, and the connector and the energy meter adopt an anti-misinsertion structure design.

[0049] Specifically, this embodiment further adds two optimized design features, which can be used either one or simultaneously.

[0050] On the one hand, in this embodiment, the connection wire between the automatic reclosing circuit breaker and the tripping circuit of the electricity meter is hidden inside the panel of the meter box. This design has multiple technical benefits: firstly, hiding the connection wire inside the panel avoids the safety hazards caused by exposed wires and prevents personnel from accidentally touching live wires during operation or inspection; secondly, concealed wiring makes the inside of the meter box neater and more aesthetically pleasing, while physically increasing the difficulty for external personnel to access or damage the control circuit, further improving the anti-theft capability and system reliability.

[0051] On the other hand, in this embodiment, the energy meter is installed in a one-time insertion manner via connectors, and the connectors and energy meter employ an anti-misinsertion structure design. The "one-time insertion installation" clearly defines the installation method as direct plug-in, requiring no additional tightening, further simplifying the installation process. The "anti-misinsertion structure design" is a significant optimization based on this, typically achieved through irregularly shaped interfaces, guide grooves, or positioning clips on the connectors and energy meter. This ensures that the energy meter can only be inserted in the correct orientation, avoiding risks such as poor contact, reverse polarity, or even equipment damage due to misinsertion, effectively improving the fault tolerance and safety of on-site operation.

[0052] Furthermore, it also includes a current transformer, which is installed in the incoming line compartment or metering compartment and electrically connected to the energy meter.

[0053] Specifically, this intelligent prepaid meter box for low-voltage, high-capacity users also includes a current transformer, which is located in the incoming line room or metering room and electrically connected to the electricity meter. The current transformer is typically a current transformer, whose function is to convert the large primary current into a smaller secondary current according to a certain ratio, supplying the electricity meter for measurement. Because the current of low-voltage, high-capacity users is relatively large (usually exceeding 100A), the electricity meter cannot be directly connected to the main circuit for measurement; accurate measurement can only be achieved after current transformation through a current transformer.

[0054] By placing the instrument transformer in the incoming line compartment or metering compartment, the secondary circuit connection path between the instrument transformer and the energy meter is ensured to be as short and reliable as possible, reducing signal attenuation and external interference. Furthermore, with the instrument transformer and energy meter residing in physically isolated compartments (incoming line compartment or metering compartment), potential security risks and electricity theft hazards associated with cross-compartment wiring are avoided. This design makes the entire metering circuit (instrument transformer—connector—energy meter) more compact and reliable in structure, meeting the metering needs of large-capacity users while maintaining the overall physical isolation and anti-theft structure of the meter box, further improving the accuracy and security of the metering system.

[0055] Furthermore, the electrical connections between the incoming components in the incoming line chamber and the metering chamber, and the execution unit in the outgoing line chamber, are all achieved through the sealed wire passage hole to prevent electricity theft by bypassing the metering unit.

[0056] Specifically, all electrical connections between the metering unit (located in the metering chamber), the incoming line element in the incoming line chamber, and the execution unit in the outgoing line chamber are achieved through pre-designed sealed cable passage holes. This limitation means that any wire traveling from one chamber to another must pass through the specially designed sealed cable passage holes, and there are no other cable routing channels across chambers.

[0057] Through this design, the meter box physically constructs a complete "anti-bypass" barrier. Since all wiring entering and exiting the metering chamber is forcibly confined to the single path of the sealed wiring hole, any attempt to bypass the electricity meter for electricity theft (such as running the incoming line directly to the outgoing line without passing through the meter) must damage the structure of the sealed wiring hole or create a new hole. Such damage is easily detected by maintenance personnel during inspections. Therefore, the technical solution defined in this embodiment, by forcibly binding the electrical connection path to the physical structure of the sealed wiring hole, fundamentally eliminates the possibility of bypassing the metering unit for electricity theft, further strengthening the meter box's anti-theft capability.

[0058] Example 2 Please see Figure 2 The present invention also provides an intelligent prepayment management method for low-voltage, high-capacity users, which is applied to an intelligent prepayment management system for low-voltage, high-capacity users as described in any of the above embodiments, and includes the following steps: Step 1: The main station system monitors users' electricity balances in real time; Step 2: When a user's arrears meet the power outage policy, the master station system generates a trip command and transmits it to the energy meter; Step 3: The energy meter drives the automatic reclosing circuit breaker to open and cut off the power supply to the user according to the received trip command; Step 4: After the user pays the fee, the main station system performs a power restoration operation according to the preset power restoration mode: If it is the automatic power restoration mode, the main station system sends a closing command, and the energy meter drives the automatic reclosing circuit breaker to close automatically; if it is the safe power restoration mode, the main station system sends a closing permission signal, and the user manually operates the automatic reclosing circuit breaker to close.

[0059] It should be noted that this embodiment is a remote prepaid management process implemented based on the low-voltage, high-capacity user intelligent prepaid management meter box described in any one of Embodiments 1. The core of this method lies in constructing a complete set of remote tripping, closing, and power restoration control logic through the linkage between the master station system, the energy meter, and the external automatic reclosing circuit breaker.

[0060] Specifically, this method first involves a master station system (such as a Marketing 2.0 system) monitoring users' electricity balances in real time. When a user's outstanding balance meets the preset power outage policy, the master station system generates a trip command and transmits it to the electricity meter in the metering room. Upon receiving the trip command, the electricity meter, through its connection to the control terminal of the automatic reclosing circuit breaker, drives the automatic reclosing circuit breaker located in the outgoing line room to perform a tripping operation, thereby cutting off the power supply to the user. This process solves the technical problems of existing technologies where the built-in load switch of the electricity meter cannot carry large currents and cannot achieve remote tripping.

[0061] During the power restoration phase, this method innovatively employs a "dual-mode power restoration control logic." After the user completes payment, the master station system executes different power restoration strategies according to the preset power restoration mode: in "automatic power restoration mode," the master station system directly sends a closing command, which drives the automatic reclosing circuit breaker driven by the energy meter to automatically close the circuit, achieving rapid power restoration; in "safety power restoration mode," the master station system only sends a closing permission signal, the energy meter enters standby mode, and the user manually operates the handle of the automatic reclosing circuit breaker on-site to complete the closing. This dual-mode design takes into account both the efficiency requirements of automated power restoration and the safety requirements of on-site operation in special scenarios, providing flexible power restoration options for users with different safety levels.

[0062] Furthermore, after step three, the method further includes: after the automatic reclosing circuit breaker trips, its auxiliary contacts feed back the tripping status signal to the main station system via the energy meter to confirm the power outage.

[0063] Specifically, after step three (the energy meter drives the automatic reclosing circuit breaker to open) is executed, this embodiment further specifies that after the automatic reclosing circuit breaker opens, its auxiliary contacts will feed back the opening status signal to the main station system via the energy meter to confirm the power outage.

[0064] The significance of this technical feature lies in the fact that it not only completes the tasks of "issuing trip commands" and "executing circuit breaker opening operations", but also ensures that "the operation results are confirmed".

[0065] The actual status of the circuit breaker is collected in real time by auxiliary contacts and uploaded to the main station via the energy meter. The main station system can accurately determine whether the power outage operation has been successfully completed.

[0066] If the master station does not receive a circuit breaker confirmation signal or receives an abnormal signal, it can promptly take measures such as resending instructions, issuing alarms, or manual intervention to avoid misjudgments caused by execution failure.

[0067] This closed-loop control mechanism of "command-execution-feedback" significantly improves the reliability and traceability of the fee control system, ensuring that the power supply department can accurately and controllably manage power outages caused by users' arrears.

[0068] Furthermore, after step four, the method further includes: after closing the circuit breaker, the auxiliary contact of the automatic reclosing circuit breaker feeds back the closing status signal to the main station system via the energy meter to confirm the restoration of power.

[0069] After the automatic reclosing circuit breaker completes the closing operation, its auxiliary contacts immediately collect the closing status and transmit it to the energy meter via a signal line. The energy meter then uploads the data to the master station system. Upon receiving the closing confirmation signal, the master station system can accurately determine that the user's power supply has been restored, completing the closed-loop management of the entire fee control process.

[0070] The technical benefits of this feedback mechanism are twofold: firstly, it avoids the risk of the main station system mistakenly believing that power restoration was successful due to a failed circuit breaker operation (such as mechanical failure of the circuit breaker or line abnormality), ensuring that the power supply department accurately grasps the power supply status of users; secondly, it provides reliable status data support for subsequent electricity billing, electricity consumption monitoring, and other services, further improving the intelligence level and operational reliability of the fee control system. Through the synergistic effect of the above solutions, a closed-loop management system of "instruction issuance—operation execution—status confirmation" is achieved throughout the entire process from tripping to power restoration, providing complete technical support for intelligent fee control management of low-voltage, high-capacity users.

[0071] The above are only some embodiments of this application and do not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. An intelligent prepaid management system for low-voltage, high-capacity users, characterized in that, include: shell; An internal partition is provided inside the outer shell, dividing the internal space of the outer shell into an inlet chamber, a metering chamber, and an outlet chamber. The inlet chamber, metering chamber, and outlet chamber are physically isolated from each other through pre-set sealed cable passage holes. An electricity meter is installed in the metering room; A connector is provided in the metering room, and the energy meter is installed and electrically connected via the connector; An automatic reclosing circuit breaker is installed in the outgoing line room. Its control terminal is connected to the tripping circuit of the energy meter via a connecting line to receive tripping or closing commands issued by the energy meter.

2. The intelligent prepayment management system for low-voltage, high-capacity users according to claim 1, characterized in that, The internal partition is an SMC insulating partition; the sealed wire hole is provided with a silicone sealing ring or filled with flame-retardant sealant.

3. The intelligent prepayment management system for low-voltage, high-capacity users according to claim 1, characterized in that, The incoming line compartment is used to house the incoming line terminals and the molded case circuit breaker, and the outgoing line compartment is used to house the outgoing line terminals and the automatic reclosing circuit breaker.

4. The intelligent prepayment management system for low-voltage, high-capacity users according to claim 1, characterized in that, The automatic reclosing circuit breaker is an external circuit breaker that matches the user's capacity. Its auxiliary contacts are connected to the energy meter via signal lines to provide feedback to the energy meter on the circuit breaker's open or closed status.

5. The intelligent prepayment management system for low-voltage, high-capacity users according to claim 1, characterized in that, The connection line between the automatic reclosing circuit breaker and the tripping circuit of the energy meter is hidden inside the panel of the meter box; and / or, the energy meter is installed in a one-time insertion manner through the connector, and the connector and the energy meter adopt an anti-misinsertion structure design.

6. The intelligent prepayment management system for low-voltage, high-capacity users according to claim 1, characterized in that, It also includes a current transformer, which is installed in the incoming line room or metering room and electrically connected to the energy meter.

7. The low-voltage, high-capacity intelligent prepayment management meter box according to claim 1, characterized in that, The electrical connections between the incoming components in the incoming line chamber and the metering chamber, and the execution unit in the outgoing line chamber, are all achieved through the sealed wire passage hole to prevent electricity theft by bypassing the metering unit.

8. A method for intelligent prepaid management for low-voltage, high-capacity users, applied in an intelligent prepaid management system for low-voltage, high-capacity users as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1: The main station system monitors users' electricity balances in real time; Step 2: When a user's arrears meet the power outage policy, the master station system generates a trip command and transmits it to the energy meter; Step 3: The energy meter drives the automatic reclosing circuit breaker to open and cut off the power supply to the user according to the received trip command; Step 4: After the user pays the fee, the main station system performs a power restoration operation according to the preset power restoration mode: If it is the automatic power restoration mode, the main station system sends a closing command, and the energy meter drives the automatic reclosing circuit breaker to close automatically; if it is the safe power restoration mode, the main station system sends a closing permission signal, and the user manually operates the automatic reclosing circuit breaker to close.

9. The intelligent prepayment management method for low-voltage, high-capacity users according to claim 8, characterized in that, After step three, the method further includes: after the automatic reclosing circuit breaker trips, its auxiliary contacts feed back the tripping status signal to the main station system via the energy meter to confirm the power outage.

10. The intelligent prepayment management method for low-voltage, high-capacity users according to claim 8, characterized in that, After step four, the method further includes: after closing the circuit breaker, the auxiliary contact of the automatic reclosing circuit breaker feeds back the closing status signal to the main station system via the energy meter to confirm the restoration of power.

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