Intelligent remote control method and system for switch of power distribution network

Abstract

The application discloses a kind of power distribution network switch intelligent remote control method and system, mainly related to power distribution network automation scheduling technical field. Including: according to the set of doing operation cycle, automatically retrieve the switch equipment in power distribution network in the cycle without remote control success record, generate the list of equipment to be done operation;With the equipment in the list of equipment to be done operation as object, rely on power distribution network topological structure and automatically comb the work path associated with each equipment, generate doing operation scheme;To doing operation scheme batch issue remote control instruction, adopt remote signaling position and load current double criterion automatically check switch on-off state;To the equipment of doing operation failure automatically enters defect management library, and tracks rectification progress until closed loop eliminates defect.The beneficial effects of the application are that it realizes the full intelligent operation of power distribution network switch from automatic screening, topological checking, remote control to defect closed loop, effectively improves the work efficiency and power supply reliability.

Description

Technical Field

[0001] This invention relates to the field of power distribution network automation dispatching technology, specifically a method and system for intelligent remote control operation of power distribution network switches. Background Technology

[0002] Distribution network switches are core equipment for self-healing faults, load transfer, and rapid power restoration in distribution networks. Their operational reliability and remote control success rate directly determine power supply quality. Currently, distribution network structures are complex, and automated equipment is massive. Routine equipment calibration and early detection of hidden defects have become essential maintenance requirements. Outdoor distribution network switches and distribution terminals are subjected to harsh weather conditions for extended periods, leading to widespread aging issues in secondary circuits, operating mechanisms, and circuit boards. Furthermore, there are numerous equipment suppliers, with primary equipment and FTU / DTU terminals belonging to dozens of manufacturers, resulting in inconsistent hardware and software specifications. After several years of operation, equipment failures become frequent, making equipment health management extremely difficult.

[0003] Traditional remote control operation of distribution network smart switches has long relied on a "manual dispatch operation + on-site verification by maintenance personnel" model, which has the following prominent shortcomings: low operational efficiency, insufficient equipment operation frequency, and extensive and closed-loop management. While existing technologies include solutions for remote control of distribution network switches, none have fully addressed these issues. For example, patent CN112563083B discloses an IoT-based smart circuit breaker implementation device based on an open protocol, focusing on the IoT communication architecture of the circuit breaker but not addressing the automated management of the entire remote control operation process. Patent CN118353169A proposes a remote control method for transmission and distribution switches based on 5G communication, achieving remote command transmission through a 5G communication channel, but still fails to solve the problems of intelligent equipment selection, automatic scheme generation, intelligent verification of execution status, and closed-loop statistical analysis, which are part of the full-process automation. Patent CN114530843A relates to automated sensing equipment for distribution network terminals, mainly focusing on line fault indication and switch status monitoring, offering limited support for the full-process management of remote control operation.

[0004] Therefore, there is an urgent need for a method and system for intelligent remote control operation of power distribution network switches to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a method and system for intelligent remote control operation of distribution network switches. It realizes fully intelligent operation of distribution network switches from automatic screening, topology verification, remote control to defect closed-loop, effectively improving work efficiency and power supply reliability.

[0006] To achieve the above objectives, the present invention employs the following technical solution: On one hand, the present invention provides a method for intelligent remote control operation of power distribution network switches, comprising the following steps: Step S1: Based on the set operation cycle, automatically retrieve the switching equipment in the distribution network that has no successful remote control record within the cycle, and generate a list of equipment to be operated; Step S2: Taking the devices in the list of devices to be operated as objects, automatically sort out the operation paths associated with each device based on the power distribution network topology and generate an operation plan; Step S3: Issue remote control commands in batches to the operation scheme, and automatically verify the switch opening and closing status using dual criteria of remote signaling position and load current; Step S4: Automatically enter the defect management database for equipment that fails to perform the operation, and track the rectification progress until the defect is eliminated in a closed loop.

[0007] Preferably, step S1 is compatible with manual search mode, which allows operators to actively search by entering the line name or the pinyin abbreviation of the line name. When there are multiple connection paths for the target line, all connection paths are listed for the operator to select.

[0008] Preferably, in step S2, the specific method for automatically sorting out the job path is as follows: Call the distribution network topology database, trace upstream to the substation and feeder of each device to be operated, sort out the associated switches and load paths downstream, and list all operable switches and standardized operating steps on the path. Call the real-time data acquisition interface to obtain the current load data, the load data to be transferred out, and the predicted load rate after the transfer for each line; Intelligent exclusion of line switchgear that has phase angle difference or cross-regional grid structure, or does not meet the loop closing conditions.

[0009] Preferably, step S2 also includes manual optimization: The dispatcher conducts a comprehensive review of the automatically generated plan and removes unreasonable or unnecessary work equipment; As a critical node, the system has implemented protective restrictions on deleting the interconnection switch, making it impossible to delete. If deleting a device results in the solution becoming non-compliant, the system will automatically issue a warning, and the solution can only proceed to the execution stage after passing the compliance verification.

[0010] Preferably, the dual criterion verification in step S3 includes remote signaling change determination, load current change determination, and steady-state delay determination: After remote control is executed, the system monitors whether the remote signaling position of the switch changes to the target state within the predetermined time. If the remote signaling change is successful, it further determines whether the load current reaches the predetermined threshold value. If both are satisfied, the operation is considered successful, and no on-site verification by maintenance personnel is required. If the remote signaling change is successful but the load current fails the verification, the system will display a pop-up message prompting the dispatcher to make a manual judgment and decision based on real-time data; if the remote signaling change fails, the abnormal handling procedure will be triggered.

[0011] Preferably, in step S3, a tiered handling option is set for abnormal scenarios, and the tiered handling option includes at least one of the following four: The stop strategy terminates the entire execution of the current plan; Re-execute this step, that is, retry the currently failed instruction; Continue to the next step, that is, skip the current step and continue with the subsequent operations; Continue to the next switch, that is, skip all the operation steps of the current switch and continue to execute the subsequent switch.

[0012] On the other hand, the present invention also provides an intelligent remote control operation system for distribution network switches, used to implement the above-described intelligent remote control operation method for distribution network switches, including: The intelligent equipment retrieval module is used to automatically retrieve switching equipment in the distribution network that has not been successfully remotely controlled within the set operation cycle, and generate a list of equipment to be operated. The topology scheme generation module is used to automatically sort out the operation paths associated with each device based on the distribution network topology and generate operation schemes. The remote control execution verification module is used to issue remote control commands in batches to the operation scheme, and automatically verify the switch opening and closing status using dual criteria of remote signaling position and load current; The data statistics and defect closed-loop module is used to automatically enter equipment that fails to operate into the defect management database and track the rectification progress until the defect is eliminated. The distribution network topology database is used to store the topological relationships of distribution network equipment and equipment ledger information; The remote control operation log library is used to record the history and results of remote control operations for each device.

[0013] Preferably, the remote control execution verification module has a built-in dual criterion verification unit and a hierarchical processing unit; The dual-criteria verification unit uses remote signaling position and load current as dual criteria to automatically verify the switch opening and closing status, including remote signaling position determination, load current change determination and steady-state delay determination. The hierarchical handling unit provides four handling options: stop strategy, re-execute the current step, continue to the next step, and continue to the next switch.

[0014] Preferably, when the data statistics and defect closed-loop module automatically enters the defect database for equipment that has failed to perform operations, the information collected includes the equipment's globally unique code, the unit to which it belongs, the line to which it belongs, the equipment type, the type of failed operation, the time of failure, and the code of the reason for failure. The system pushes information to the relevant maintenance team leaders through system messages and SMS. After the maintenance team completes the troubleshooting, they fill in the troubleshooting status in the system. The system automatically verifies whether the device can be remotely controlled normally. Once the verification is passed, the system closes the loop and cancels the device. If the problem is not resolved within the prescribed rectification period, the system will automatically send a reminder to the superior authority.

[0015] On the other hand, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements intelligent remote control operation of a power distribution network switch as described above.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention completely eliminates the inefficient mode of manual operation and on-site verification by automatically searching and screening, generating solutions and performing verification. The time spent operating a single device is greatly reduced by the traditional mode, and the efficiency is greatly improved. 2. This invention supports custom cycles in multiple dimensions such as annual, quarterly, and monthly, with time accuracy down to the second. It can significantly shorten the traditional equipment operation cycle that can take several years, significantly increase the frequency of verification of old and potentially hazardous equipment, accurately capture hidden defects that cannot be detected by manual inspection, and effectively make up for the shortcomings of equipment inspection. 3. This invention eliminates the need for maintenance personnel to travel to and from the site to verify the switch status, significantly freeing up manpower at the grassroots level, reducing on-site transportation costs, manual verification costs, and vehicle maintenance costs, and maximizing the release of manpower efficiency; 4. This invention forms a complete closed loop from equipment screening, solution generation, remote execution to defect management. Equipment that fails to operate is automatically marked with defect type, entered into the defect database, and tracked throughout the process until the defect is eliminated in the closed loop. This forms a complete management chain of "discovery - dispatch - defect elimination - verification - closed loop", which solves the problems of loose defect management and delayed rectification in the traditional model. 5. This invention supports manual retrieval and intervention, and manual optimization of solutions. Key communication switches are protected and cannot be deleted. At the same time, it sets up tiered options for handling abnormal operations, ensuring a high degree of automation while retaining the ability for flexible manual intervention, adapting to complex and ever-changing on-site working conditions. 6. This invention effectively improves the accuracy of distribution network switch operation, remote control success rate, and self-healing capability of network faults by shortening the operation cycle and increasing the operation coverage, thus consolidating the foundation for the safe and stable operation of the distribution network. 7. This invention relies on existing power distribution automation systems to achieve functional development, without the need for a large number of new hardware devices. It has low transformation costs and low barriers to entry, is suitable for provincial, prefectural and county-level dispatching scenarios, and is compatible with various intelligent switches and automation terminals. It can be widely used in scenarios such as routine periodic inspections, load transfer pre-verification, hidden danger investigation of old equipment, and special investigations during peak summer and peak winter seasons. It has extremely high value for large-scale promotion and application. Attached Figure Description

[0017] Figure 1 This is a flowchart of the method of the present invention; Figure 2 This is a schematic diagram of the automatic execution verification and hierarchical processing flow of the present invention; Figure 3 This is a schematic diagram of the system structure of the present invention; Figure 4 This is a circuit connection diagram in an embodiment of the present invention. Detailed Implementation

[0018] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0019] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0020] Example: This embodiment uses the 2026 peak summer power supply special inspection of a municipal power supply company (hereinafter referred to as X City Power Supply Company) as the application scenario. X City Power Supply Company has three district and county power supply centers under its jurisdiction: Area A, Area B, and Area C. The distribution network within its jurisdiction is large in scale, and the distribution automation equipment is supplied by dozens of different manufacturers. The hardware and software specifications of the primary equipment and FTU / DTU terminals vary significantly, and the years of operation range from 1 to 15 years, with inconsistent equipment health status.

[0021] In June 2026, City X will enter its peak summer load period. To ensure the reliability of distribution network switches under high temperature and heavy load conditions, the X City Power Supply Company's Power Supply Service Command Center has decided to conduct a centralized remote control operation inspection of all smart switches within its jurisdiction from June 15th to June 30th to identify and eliminate hidden defects such as terminal offline, mechanism jamming, and control circuit abnormalities in advance. The technical solution of this embodiment will be explained in detail below using the 10kV line 1 of Substation A as an example.

[0022] The 10kV line is fed from the 10kV I section busbar of the 110kV Jia substation. The line has pole-mounted sectionalizing and branch line switches (numbered starting with K) and pole-mounted tie switches (numbered starting with LS). Among them, K12 has been in operation for more than 10 years and is a key target for inspection of old equipment.

[0023] I. Automatic Search and Screening: Combination Figure 1 The flowchart shown indicates that automatic retrieval and screening is the entry point for the entire operation process. The dispatcher first sets the operation cycle parameters in the operation management interface of the distribution automation master station system. In this embodiment, the set operation cycle is an annual cycle, with a start and end time from 00:00:00 on July 1, 2025 to 23:59:59 on June 30, 2026, with time accuracy down to the second. After the cycle is set, the system automatically starts the retrieval program.

[0024] Based on the equipment ledger database and remote control operation log database, the system categorizes all intelligent switching equipment within its jurisdiction into two types: the first type consists of devices that have been successfully remotely controlled within a set period, i.e., devices whose most recent successful remote control record falls within the set period range; the second type consists of devices that have not been remotely controlled or have failed to be remotely controlled within a set period, i.e., devices with no successful remote control records within the set period range. The system automatically locks the second type of devices as devices awaiting operation and generates a preliminary list of devices awaiting operation.

[0025] Take the 10kV line of station A as an example (e.g.) Figure 4 Taking the example shown, after searching the remote control operation log database, the system found that: the most recent successful remote control record for sectionalizing switch K11 was August 15, 2025, which is within the set period range and is classified as Category 1, not included in the list of pending operations; the most recent successful remote control record for sectionalizing switches K12 and K13 was March 10, 2024, which is outside the set period range and is classified as Category 2, included in the list of pending operations; the most recent successful remote control record for branch lines K14 and K15 was May 4, 2025, which is also outside the period range; the tie switches LS1, LS2, and LS3 are also outside the period range and included in the list of pending operations. Following this pattern, the system ultimately selects the equipment to be operated from the 10kV line 1 of Substation A, and records information such as the line name, equipment type, commissioning year, and most recent remote control time for each piece of equipment.

[0026] For older equipment that has been in operation for over 10 years or during peak summer seasons, the system supports setting shorter operation cycles to achieve high-frequency and accurate verification. For example, dispatchers can set the operation cycle to a quarterly cycle (e.g., from 00:00:00 on April 1, 2026 to 23:59:59 on June 30, 2026) or a monthly cycle (e.g., from 00:00:00 on June 1, 2026 to 23:59:59 on June 30, 2026), and the system will accurately filter out equipment that has not been operated during that time period. In this embodiment, for older equipment such as K12 that has been in operation for over 10 years, the dispatcher additionally set a monthly cycle for focused inspection.

[0027] In addition to the automatic search mode, the system also supports a manual search mode. Operators can actively search by entering the line name or its abbreviation in pinyin through the operation management interface. For example, if the dispatcher enters the pinyin abbreviation "XLY" or the full line name "Line 1" in the search box, the system will retrieve all connection path information for that line. When multiple connection paths exist for the target line, the system will list all connection paths for the operator to select one by one. 10kV Line 1 has three connection paths: one connects to 10kV Line 2 of Substation B via connection switch LS1, another connects to 10kV Line 2 of Substation C via branch switch K14 and connection switch LS2, and the last connects to 10kV Line 3 of Substation D via branch switch K15 and connection switch LS3. The system lists these three connection paths simultaneously, and the operator can select one or all of them for operation screening, thereby achieving full coverage screening of all connection paths, avoiding invalid operations from the source, and ensuring accurate locking of the line or switch to be operated.

[0028] II. Automatically generated scheme: After the automatic retrieval and screening are completed, the system uses the equipment in the list of equipment to be operated as the object, and automatically sorts out the operation paths associated with each equipment based on the power distribution network topology to generate an operation plan. The specific process of automatically generating the plan is as follows.

[0029] The system first calls the distribution network topology database, taking the locked line to be operated as the object, and traces upstream along the line to be operated, for each device, to its corresponding substation and feeder, and downstream to sort out the associated switches and load paths. The logic for generating the scheme is as follows: first close the tie → open the first switch on the nearest power supply path of line A to the tie (only switches on the power supply path are generated, branches and sections not on the main line are not operated), → close the first switch on the nearest power supply path of line A to the tie → open the second switch on the nearest power supply path of line A to the tie → close the second switch on the nearest power supply path of line A to the tie... → open the first switch on the nearest power supply path of the transfer line to the tie → close the first switch on the nearest power supply path of the transfer line to the tie... → disconnect the tie. Taking the 10kV line 1 of station A as an example, assuming that the tie switch LS1 was selected earlier, starting from the node where the selected tie switch LS1 is located, trace upwards to its line and upstream power supply substation and feeder, and downwards to sort out the load and associated switches to generate a complete operation path including opening and closing operations: → Close LS1 → Open K13 → Close K13 → Open K12 → Close K12 → Open K22 → Close K22 → Open K21 → Close K21 → Open LS1.

[0030] During the scheme generation process, the system intelligently excludes switchgear (such as K11) that has already been successfully remotely controlled within a specified period, avoiding repeated operations. Simultaneously, the system intelligently excludes line switchgear with phase angle differences or cross-regional network structures that do not meet the loop-closing conditions, avoiding the generation of non-compliant loop-closing operation schemes. In this embodiment, although 10kV line one and 10kV line three are connected by tie switch LS2, the two lines have a 30-degree phase angle difference, which does not meet the loop-closing operation conditions. If tie switch LS2 is selected, the system automatically identifies this topological constraint when generating the operation scheme, limiting the operation scheme to opening and closing operations, not generating a loop-closing power transfer scheme, and reminding users that the operation will cause a short-term power outage, ensuring that the operation scheme complies with electrical safety standards and minimizing power outages for users.

[0031] The system simultaneously calls the real-time data acquisition interface to obtain the current load data, the load to be transferred out, and the predicted load rate after the transfer for each line, and presents them all in the scheme interface for dispatcher verification. As shown in Table 1, in this embodiment, the scheme interface shows that the current load current of 10kV line one is 117A, the load to be transferred out is 85A (load in the K11 to LS1 section), the local limit is 486A, and the predicted load rate after the transfer is 36%; the current load current of 10kV line two is 59A, the load to be transferred out is 59A (load in the CB2 to LS1 section), the local limit is 554A, and the predicted load rate after the transfer is 26%, all within the safe range. This load data helps the dispatcher intuitively assess the impact of the operation on the power grid operation.

[0032] Table 1 Load Parameter Table for Transfer In and Transfer Out

[0033] The automatically generated operation plan provides a complete output of the units involved in the operation, substations, feeders, switchgear, and standardized operating procedures. Taking the 10kV line 1 of Substation A as an example, the tie switch LS1 is selected, and the plan content is shown in Table 2.

[0034] Table 2 Operation Summary

[0035] After the dispatcher fully reviews the automatically generated plan, if any unreasonable or unnecessary equipment is found, it can be deleted by right-clicking the corresponding record. However, the tie switch LS1 is a critical node, and the system has protection restrictions on its deletion; it cannot be deleted. If the dispatcher attempts to delete LS1, the system will display a prompt indicating that the device is a tie switch and is protected and cannot be deleted.

[0036] If deleting equipment results in a non-compliant solution, the system will automatically issue a warning. For example, if the dispatcher wants to delete sectionalizing switch K12, and the system detects that K12 is an old device requiring special attention, the system will automatically display a warning, suggesting that K12 be retained in the solution. The solution can only proceed to the execution phase after passing compliance verification. This mechanism ensures that the final operational plan is scientifically sound, compliant, and closely aligned with actual site conditions.

[0037] III. Automatic verification: After the dispatcher fully checks, verifies, and confirms the operation plan, they click the "Execute" button on the operation management interface. The system then issues remote control commands to each machine in batches according to the plan sequence, automatically executing the remote control operations. Combined with... Figure 2 The automatic execution verification and graded handling process shown in the figure involves the system monitoring the remote signaling position feedback and load current changes in real time during the remote control execution of each device, and automatically verifying the switch opening and closing status using both remote signaling position and load current as dual criteria.

[0038] Remote control operation is divided into two stages: remote preset and remote execution. Taking the opening operation of sectionalizing switch K12 as an example, the system first issues a remote preset opening command. After receiving the preset command, the FTU terminal of K12 returns a confirmation of successful preset. The system then issues a remote execution opening command, and the FTU terminal of K12 drives the switch operating mechanism to perform the opening action.

[0039] The dual-criteria verification includes three sub-criteria: remote signaling change determination, load current change determination, and steady-state delay determination. These three criteria are executed sequentially. The first sub-criteria is remote signaling change determination: after the remote control execution command is issued, the system monitors whether the remote signaling position of the switch changes to the target state within a predetermined time. In this embodiment, the predetermined time is set to 30 seconds, meaning that a change signal is uploaded within 30 seconds after the remote control execution command is issued, indicating a successful change. After the tripping command for K12 is issued, the system receives feedback from the remote signaling position indicating a tripped state after 12 seconds, thus the remote signaling change determination passes.

[0040] The second sub-criterion is the load current change determination: After a successful remote signaling change, the system waits for a steady-state delay (set to 20 seconds in this embodiment) before determining whether the load current has reached a predetermined threshold value. For a tripping operation, the threshold value is set to 0.05A, meaning the line load current should drop below 0.05A after tripping; for a closing operation, the threshold value is set to 5A, meaning the line load current should rise above 5A after closing. These parameters can be customized by the user according to the actual on-site conditions. After K12 trips and waits 20 seconds, the system collects a load current of 0.02A for K12, which is below the 0.05A threshold value, thus the load current change determination passes.

[0041] The third sub-criterion is steady-state delay determination: After the remote signaling change and load current change have both passed, the system waits for a steady-state delay period (10 seconds in this embodiment) to confirm that the switch state is stable and without jitter before finally determining that the operation was successful. During the steady-state delay period, K12 maintains the open position continuously and the load current remains below the threshold value. All three sub-criterions are met, and the system determines that the K12 opening operation was successful without the need for on-site verification by maintenance personnel.

[0042] If the remote signaling position change is successful but the load current fails the verification, the system pop-up prompts the dispatcher to manually analyze and make decisions based on real-time data. In this embodiment, after the sectionalizing switch K22 is closed, the remote signaling position feedback shows a closed state (successful position change), but after waiting for 20 seconds, the load current remains at 3.65A, not rising above the 5A threshold. The system pop-up prompts that the load current of K22 is abnormal. Based on the fact that the load current of K22 was lower than 3.65A before the operation, the dispatcher determines that the closing of K22 was successful and continues to execute subsequent equipment operations.

[0043] If the remote signaling change fails, meaning no remote signaling change signal is received within 30 seconds after the remote control execution command is issued, or the remote signaling position feedback is inconsistent with the target state, the system triggers the abnormal handling procedure. In this embodiment, if the remote signaling position remains in the closed state for 30 seconds after the opening command of switch K21 is issued, the remote signaling change determination fails, the system determines that the opening operation of K21 has failed, and triggers the abnormal handling procedure.

[0044] For abnormal scenarios, the system offers tiered handling options, providing four handling strategies for dispatchers to choose from as needed. The first is a stop strategy, which terminates the entire execution of the current plan. This is suitable for scenarios where a systemic communication failure or a significant change in the power grid's operating mode requires immediate cessation of all operations or makes subsequent operations impossible. The second is to retry the current step, which retry the failed command. This is suitable for single failures caused by intermittent communication timeouts or transient interference. The third is to continue to the next step, which skips the current step and continues with subsequent operations. This is suitable for scenarios where the current step is non-critical and does not affect the operation of subsequent equipment. The fourth is to continue to the next switch, which skips all operational steps of the current switch and continues with subsequent switches. This is suitable for scenarios where the current switch has a suspected hardware fault requiring on-site investigation.

[0045] In this embodiment, if remote tripping of K21 fails, and the dispatcher chooses to re-execute this step but still fails, the system selects to continue to the next switching strategy. The system skips all operation steps of K21 and continues with the operation of LS1. If closing of K21 fails, and the dispatcher chooses to re-execute this step but still fails, the system selects a stop strategy, notifying the equipment operation and maintenance management unit to verify and handle the issue. The original operating mode is restored after K22 is resolved. This tiered handling mechanism balances the efficiency of automated operations with the flexibility of fault handling, effectively reducing the operational error rate.

[0046] IV. Automatic Aggregation Analysis: After all equipment has completed its operation, the system automatically summarizes the operation completion status of each unit, line, and device, accurately calculates the remote control operation data, and generates an operation statistics report. In this embodiment, the report generated by the system includes: the power supply center in Zone B executed one operation plan, controlled five devices remotely, four devices successfully completed the operation, and one device failed (K21 remote control operation failed), with a total time of 2 minutes and 55 seconds. The average operation time per device is less than one minute, significantly improving the efficiency of equipment scheduled maintenance.

[0047] For equipment that fails to operate, the system automatically enters its relevant information into the defect management database. Equipment that fails remote control, exhibits abnormal actions, or fails verification is automatically marked with a defect type, a rectification work order is generated, and a work log and rectification tracking record are created, tracking the defect handling progress throughout the entire process until the defect is eliminated. In this embodiment, the defect information collected by the system includes: the equipment's globally unique code (e.g., K21's code is BH-BH-I-K21-005), the unit to which it belongs (B Zone Power Supply Center), the line to which it belongs (10kV Line 1), the equipment type (pole-mounted sectionalizing switch), the type of failed operation (opening), the failure time (June 20, 2026, 14:32:15), and the failure reason code (remote control execution failure).

[0048] The system pushes defect rectification work orders to the relevant maintenance team leaders through both system messages and SMS. In this embodiment, the defect work order for K21 is simultaneously pushed to the mobile phone and system account of Zhang, the head of the distribution maintenance team at the B-zone power supply center, via the station's internal message module of the distribution automation master station system and the SMS gateway. After receiving the work order, the maintenance team dispatches personnel to the site to investigate the remote control circuit of K21. They found that the small terminal dead zone value caused frequent telemetry, resulting in remote control execution failure. The terminal dead zone value has been changed.

[0049] After the maintenance team completes the defect elimination process, they fill in the defect elimination status in the system, including the elimination time, personnel involved, elimination measures, and elimination results. The system automatically verifies whether the equipment can be remotely controlled normally. That is, the system automatically generates an operation plan including K21, first closing the communication switch, then opening K21, then closing K21 again, and finally opening the communication switch. The dispatcher confirms and executes the plan. After verification, the system automatically closes the defect work order. If the defect is not eliminated within the specified rectification period (in this embodiment, remote control failure is a serious defect, set at 72 hours), the system automatically pushes a reminder to the superior, forming a complete management chain of discovery, work order dispatch, defect elimination, verification, and closure. The system also supports multi-dimensional statistical analysis by unit, line, and equipment type, generating operation reports to provide data support for maintenance decisions.

[0050] like Figure 3 As shown in the figure, this embodiment provides an intelligent remote control operation system for power distribution network switches, which includes the following modules.

[0051] The intelligent equipment retrieval module connects to the distribution network topology database and the remote control operation log database. It filters equipment to be operated based on a custom cycle and provides a manual search interface based on line name or pinyin abbreviation, supporting a complete list of multiple connection paths for selection. Custom operation cycles include, but are not limited to, annual, semi-annual, quarterly, and monthly cycles, with start and end times accurate to the second. In this embodiment, the intelligent equipment retrieval module reads ledger information for over 5,000 switching devices from the distribution network topology database and historical remote control operation records for each device from the remote control operation log database, filtering out 212 devices to be operated based on an annual cycle.

[0052] The topology scheme generation module connects the intelligent device retrieval module and the distribution network topology database. It automatically identifies work paths based on the distribution network topology, targeting locked lines or switches to be operated. It intelligently excludes equipment already operated within the cycle and equipment that does not meet the loop-closing conditions, generating an operation scheme that includes unit, substation, feeder, switchgear, operation steps, and load data. It supports manual deletion of unnecessary equipment but restricts the deletion of tie switches and provides automatic compliance verification of the scheme. In this embodiment, the topology scheme generation module generated an operation scheme for the 10kV line of Substation A, including 5 devices and 10 operation steps, and automatically excluded loop-closing operations with phase angle differences.

[0053] The remote control execution verification module, connected to the scheme verification module, is used to issue remote control commands in batches with a single click for verified operation schemes and execute them sequentially. This module incorporates a dual-criteria verification unit and a tiered handling unit. The dual-criteria verification unit automatically verifies the switch's open / closed status using both remote signaling position and load current criteria. Specifically, it includes three sub-criteria: remote signaling change judgment (successful change within 30 seconds), load current change judgment (opening threshold 0.05A, closing threshold 5A), and steady-state delay judgment (20-second steady-state wait plus 10-second stable confirmation). The tiered handling unit provides four handling options: stop strategy, re-execute the current step, continue to the next step, and continue to the next switch. In this embodiment, the remote control execution verification module issued remote control commands to 9 devices in batches. Four devices successfully completed the operation based on the dual-criteria verification, while one device failed the remote signaling change, triggering tiered handling.

[0054] The data statistics and defect closure module connects the remote control execution verification module and the defect management database. It automatically summarizes the number of execution plans and remote control devices from each unit, automatically records failed operations into the defect database, and tracks the rectification progress until closure. When automatically recording failed operations into the defect database, this module collects information including the device's globally unique code, affiliated unit, affiliated line, device type, failed operation type, failure time, and failure reason code. The system pushes the information to the relevant maintenance team leader via system messages and SMS. After the maintenance team completes the defect rectification, they report the rectification status in the system. The system automatically verifies whether the device can be remotely controlled normally. Once verification is successful, the closure is completed. If the defect is not rectified within the specified rectification period, the system automatically sends a reminder to the superior. In this embodiment, the data statistics and defect closure module records the information of the failed remote control device K21 into the defect management database, generates a rectification work order, pushes it to the maintenance team via dual channels, and automatically verifies the closure after defect rectification.

[0055] The distribution network topology database stores the topological relationships and equipment ledger information of distribution network equipment, including the hierarchical relationships, connection relationships, equipment types, commissioning dates, manufacturer models, etc., of each substation, feeder, and switchgear. In this embodiment, the distribution network topology database stores the topological relationships and ledger information of all more than 5,000 switchgear devices within the jurisdiction of the X City Power Supply Company.

[0056] The remote control operation log database records the remote control operation history and results of each device, including remote control time, remote control type (opening / closing), remote control result (success / failure), remote signaling change time, load current value, etc. In this embodiment, the remote control operation log database records all remote control operation history of all 8 switchgear devices on the 10kV line since commissioning. The device intelligent retrieval module uses this data to filter out devices that have not been successfully remotely controlled within the period.

[0057] This embodiment also provides a computer-readable storage medium storing a computer program. When executed by a processor, this program implements the aforementioned intelligent remote control operation method for distribution network switches. The computer-readable storage medium can be, but is not limited to, various media capable of storing program code, such as a USB flash drive, external hard drive, read-only memory, random access memory, magnetic disk, or optical disk. In this embodiment, the computer program is deployed on the application server of the distribution automation master station system. When executed by the processor, it sequentially completes four steps: automatic retrieval and screening, automatic scheme generation, automatic verification, and automatic aggregation and analysis, thereby achieving full automation of the intelligent remote control operation of distribution network switches.

[0058] After applying the technical solution of this embodiment, the X City Power Supply Company achieved significant results in its special inspection for peak summer power demand in 2026. The operation time for a single device was reduced from more than 20 minutes in the traditional manual mode to less than 2 minutes. Conventional equipment can complete the entire operation and verification in 1 minute, improving the efficiency of operation by more than 90%. In the embodiment, the total operation time for the entire set of 5 devices (including scheme generation, remote execution, dual criterion verification, and defect entry) was about 8 minutes, while the traditional manual mode would take at least 2 hours.

[0059] The equipment operation cycle has been shortened from the traditional two years to one year, and can be further shortened to quarterly or monthly as needed. Hidden defects in older equipment that cannot be detected through traditional manual inspections can be precisely identified through operation. Equipment that fails to operate is 100% automatically entered into the defect database and tracked in a closed loop throughout the process, completely solving the problem of loose and lagging traditional defect management. The accuracy of distribution network switch operation, remote control success rate, and self-healing capability of the grid structure are comprehensively improved.

[0060] The method and system of this embodiment can be widely applied to distribution automation master station systems at all levels, covering provincial, prefectural, and county-level dispatching. This embodiment does not require a large amount of new hardware equipment; functional development can be achieved based on existing distribution automation systems. It has low transformation costs, low barriers to entry, and short cycle time. It is compatible with distribution network structures in various regions, various intelligent switches, and automation terminals, exhibiting strong compatibility and versatility. It possesses extremely high industrial practical value and broad prospects for promotion and application.

[0061] The above is a detailed description of the preferred embodiments of the present invention, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A method for intelligent remote control operation of a power distribution network switch, characterized in that, Includes the following steps: Step S1: Based on the set operation cycle, automatically retrieve the switching equipment in the distribution network that has no successful remote control record within the cycle and generate a list of equipment to be operated; Step S2: Taking the devices in the list of devices to be operated as objects, automatically sort out the operation paths associated with each device based on the power distribution network topology and generate an operation plan; Step S3: Issue remote control commands in batches to the operation scheme, and automatically verify the switch opening and closing status using dual criteria of remote signaling position and load current; Step S4: Automatically enter the defect management database for equipment that fails to perform the operation, and track the rectification progress until the defect is eliminated in a closed loop.

2. The intelligent remote control operation method for a power distribution network switch according to claim 1, characterized in that, Step S1 is compatible with manual search mode, which allows operators to actively search by entering the line name or the pinyin abbreviation of the line name. When there are multiple connection paths for the target line, all connection paths will be listed for the operator to select.

3. The intelligent remote control operation method for a power distribution network switch according to claim 1, characterized in that, In step S2, the specific method for automatically sorting out the job path is as follows: Call the distribution network topology database, trace upstream to the substation and feeder of each device to be operated, sort out the associated switches and load paths downstream, and list all operable switches and standardized operating steps on the path. Call the real-time data acquisition interface to obtain the current load data, the load data to be transferred out, and the predicted load rate after the transfer for each line; Intelligent exclusion of line switchgear that has phase angle difference or cross-regional grid structure, or does not meet the loop closing conditions.

4. The intelligent remote control operation method for a power distribution network switch according to claim 1, characterized in that, Step S2 also includes manual optimization: The dispatcher conducts a comprehensive review of the automatically generated plan and removes unreasonable or unnecessary work equipment; As a critical node, the system has implemented protective restrictions on deleting the interconnection switch, making it impossible to delete. If deleting a device results in the solution becoming non-compliant, the system will automatically issue a warning, and the solution can only proceed to the execution stage after passing the compliance verification.

5. The intelligent remote control operation method for a power distribution network switch according to claim 1, characterized in that, The dual criterion verification in step S3 includes remote signaling change determination, load current change determination, and steady-state delay determination: After remote control is executed, the system monitors whether the remote signaling position of the switch changes to the target state within the predetermined time. If the remote signaling change is successful, it further determines whether the load current reaches the predetermined threshold value. If both are satisfied, the operation is considered successful, and no on-site verification by maintenance personnel is required. If the remote signaling change is successful but the load current fails the verification, the system will display a pop-up message prompting the dispatcher to make a manual judgment and decision based on real-time data; if the remote signaling change fails, the abnormal handling procedure will be triggered.

6. The intelligent remote control operation method for a power distribution network switch according to claim 1, characterized in that, Step S3 sets tiered handling options for abnormal scenarios, and the tiered handling options include at least one of the following four: The stop strategy terminates the entire execution of the current plan; Re-execute this step, that is, retry the currently failed instruction; Continue to the next step, that is, skip the current step and continue with the subsequent operations; Continue to the next switch, that is, skip all the operation steps of the current switch and continue to execute the subsequent switch.

7. A smart remote control operation system for distribution network switches, used to implement the smart remote control operation method for distribution network switches as described in any one of claims 1-6, characterized in that, include: The intelligent equipment retrieval module is used to automatically retrieve switching equipment in the distribution network that has not been successfully remotely controlled within the set operation cycle, and generate a list of equipment to be operated. The topology scheme generation module is used to automatically sort out the operation paths associated with each device based on the distribution network topology and generate operation schemes. The remote control execution verification module is used to issue remote control commands in batches to the operation scheme, and automatically verify the switch opening and closing status using dual criteria of remote signaling position and load current; The data statistics and defect closed-loop module is used to automatically enter equipment that fails to operate into the defect management database and track the rectification progress until the defect is eliminated. The distribution network topology database is used to store the topological relationships of distribution network equipment and equipment ledger information; The remote control operation log library is used to record the history and results of remote control operations for each device.

8. The intelligent remote control operating system for power distribution network switches according to claim 7, characterized in that, The remote control execution verification module has a built-in dual-criteria verification unit and a hierarchical processing unit; The dual-criteria verification unit uses remote signaling position and load current as dual criteria to automatically verify the switch opening and closing status, including remote signaling position determination, load current change determination and steady-state delay determination. The tiered handling unit provides four handling options: stop strategy, re-execute the current step, continue to the next step, and continue to the next switch.

9. The intelligent remote control operating system for power distribution network switches according to claim 7, characterized in that, When the data statistics and defect closed-loop module automatically enters the defect database for equipment that has failed to perform operations, the information collected includes the equipment's globally unique code, the unit to which it belongs, the line to which it belongs, the equipment type, the type of failed operation, the time of failure, and the code of the reason for failure. The system pushes information to the relevant maintenance team leaders through system messages and SMS. After the maintenance team completes the troubleshooting, they fill in the troubleshooting status in the system. The system automatically verifies whether the device can be remotely controlled normally. Once the verification is passed, the system closes the loop and cancels the device. If the problem is not resolved within the prescribed rectification period, the system will automatically send a reminder to the superior authority.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it enables intelligent remote control operation of a power distribution network switch as described in any one of claims 1-6.

Images