Intelligent operation and maintenance method and system for thermal power engineering based on fusion of BIM and digital twin

Abstract

The application discloses a thermal power engineering intelligent operation and maintenance method and system based on BIM and digital twin fusion, relates to the technical field of thermal power engineering, and comprises the following specific steps: after the completion of the thermal power engineering maintenance operation, the isolation release time, the return confirmation time and the subsequent operation permission application time of the target maintenance object are obtained; according to the isolation release time and the return confirmation time, the return handover section of the target maintenance object is formed; according to the falling position judgment of the subsequent operation permission application time, the application falling into the handover section is defined as the return connection application, and the connection confirmation record is not generated temporarily; after the return confirmation is completed, the return handover section is ended, the connection relationship is checked again, and if the application time is not earlier than the return confirmation time, the connection confirmation record is generated. The application can distinguish two different stages of isolation release and return completion, and avoids directly confirming the subsequent operation connection according to only the isolation release record.

Description

Technical Field

[0001] This invention relates to the field of thermal power engineering technology, and in particular to an intelligent operation and maintenance method and system for thermal power engineering based on the integration of BIM and digital twins. Background Technology

[0002] In the operation and maintenance of thermal power plants, there is usually a continuous connection between equipment overhaul, isolation release, on-site re-establishment, and subsequent work permits. To ensure the safety of overhaul operations, isolation measures such as tagging, electrical isolation, and mechanical isolation must be implemented on the object to be overhauled before overhaul; after overhaul, the corresponding isolation measures must be released, and on-site personnel must re-confirm the overhaul object, the overhaul area, and related temporary measures. Only after the target overhaul object has been re-confirmed can subsequent overhaul, commissioning, and re-inspection operations be appropriately continued.

[0003] With the application of BIM and digital twin technologies in the operation and maintenance of thermal power plants, the location relationships of maintenance objects, the distribution of isolation points, the scope of maintenance areas, and work records can be managed in a correlated manner through models and operational data. Existing technologies typically focus on recording, displaying, and tracing equipment operating status, maintenance work records, work permit processes, or operation and maintenance data to enable maintenance personnel to understand equipment status and work progress. This approach can improve the visualization and management efficiency of maintenance records to a certain extent.

[0004] However, in actual thermal power plant maintenance operations, the lifting of isolation does not necessarily mean that the target maintenance object has been fully returned to its original location. There is often a handover process between the isolation lifting time and the return confirmation time. For example, temporary measures need to be removed, site markings restored, the maintenance area returned, and equipment status verified, among other things. During this handover process, if subsequent work permit applications have already been submitted, existing work management methods may easily rely solely on isolation lifting records or work completion records to determine whether subsequent work can continue, failing to adequately distinguish between the difference between isolation lifting and confirmed return.

[0005] To address this, a method and system for intelligent operation and maintenance of thermal power plants based on the integration of BIM and digital twins is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide an intelligent operation and maintenance method and system for thermal power plants based on the integration of BIM and digital twins, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] In a first aspect, the present invention provides an intelligent operation and maintenance method for thermal power plants based on the integration of BIM and digital twins, comprising the following specific steps:

[0009] Step 1: After the maintenance work of the thermal power plant is completed, obtain the isolation release time, restoration confirmation time and subsequent work permit application time corresponding to the target maintenance object;

[0010] Step 2: Based on the isolation release time and the return confirmation time, form the return handover segment of the target maintenance object. The return handover segment is used to characterize the handover process from the isolation release to the completion of on-site return confirmation.

[0011] Step 3: Determine the succession relationship between the subsequent work permit application and the return confirmation time based on the position of the subsequent work permit application time falling into the return handover period;

[0012] Step 4: When the application time for the subsequent work permit falls within the return handover period, the application for the subsequent work permit is identified as a return handover application, and no subsequent work continuation confirmation record is generated temporarily.

[0013] Step 5: Once the reset confirmation time is reached, the reset handover phase ends, and the continuity between the subsequent work permit application and the reset confirmation time is re-verified.

[0014] Step 6: When the application time for the subsequent job permit is not earlier than the return confirmation time, generate the subsequent job continuation confirmation record.

[0015] Preferably, the recovery handover segment starts with the isolation release time and ends with the recovery confirmation time. When determining the succession relationship between the subsequent work permit application and the recovery confirmation time, the time of the subsequent work permit application is compared with the recovery handover segment. If the time of the subsequent work permit application is within the recovery handover segment, the subsequent work permit application is marked as a recovery preemptive application.

[0016] Preferably, after marking the subsequent work permit application as a reset emergency connection application, the original permit application time of the reset emergency connection application is retained, and the reset emergency connection application is assigned to the corresponding reset handover segment; before the end of the reset handover segment, the reset emergency connection application is not used as the basis for the target maintenance object to complete the subsequent work connection, and the corresponding permit application record is not deleted, reset or regenerated because its application time is earlier than the reset confirmation time.

[0017] Preferably, the reset confirmation time is the time when the target maintenance object completes the on-site reset confirmation and forms a reset confirmation record. The on-site reset confirmation includes at least one of the following: confirmation of removal of temporary maintenance measures, confirmation of restoration of on-site markings, or confirmation of handover of maintenance area.

[0018] The removal and confirmation of temporary maintenance measures includes on-site verification and confirmation of the removal of temporary grounding wires for thermal power equipment maintenance, removal of temporary sealing components, removal of temporary protective facilities, and removal of temporary test wiring.

[0019] The confirmation of restoration of on-site signage includes the resetting, repositioning, and verification of equipment operation status warning signs, safety warning signs, isolation fence signs, and equipment number signs.

[0020] The handover confirmation of the maintenance area includes the cleaning of the maintenance work surface, the removal of tools and equipment, the withdrawal of maintenance personnel, and the removal of the maintenance isolation boundary. After these steps, the operation and maintenance party and the maintenance party complete the handover verification and confirmation of the equipment and work area.

[0021] Preferably, the isolation release time is the time when the maintenance isolation measures corresponding to the target maintenance object are lifted and an isolation release record is formed; the maintenance isolation measures include at least one of tag isolation, electrical isolation, or mechanical isolation;

[0022] After the isolation release record is generated, the release completion time corresponding to the isolation release record is taken as the isolation release time.

[0023] Preferably, the application time for the subsequent work permit is the time when the follow-up application record is formed for the target maintenance object;

[0024] The follow-up application record includes the target maintenance object to be entered and the application submission time, and the application submission time is used as the application time for the subsequent work permit.

[0025] Preferably, before the end of the re-establishment handover phase, the re-establishment preemptive application retains its original license application time; the original license application time is only used to determine the sequential relationship between the re-establishment preemptive application and the re-establishment handover phase, and is not used to change the isolation release time, the re-establishment confirmation time, or the start and end of the re-establishment handover phase.

[0026] Preferably, the spatial correspondence between the target maintenance object and the corresponding maintenance area and isolation point is determined based on the BIM model, and the target maintenance object corresponding to the isolation release time and the return confirmation time is determined based on the spatial correspondence.

[0027] Preferably, when the restoration preemptive request occurs during the restoration handover segment, the restoration preemptive request is not used as the basis for ending the restoration handover segment, and the restoration handover segment still ends when the restoration confirmation time is formed.

[0028] Secondly, the present invention provides an intelligent operation and maintenance system for thermal power plants based on the integration of BIM and digital twins, which implements the aforementioned intelligent operation and maintenance method for thermal power plants based on the integration of BIM and digital twins. The system includes:

[0029] The information acquisition module is used to acquire the isolation release time, return confirmation time, and subsequent work permit application time for the target maintenance object.

[0030] A re-entry handover segment forming module is used to form a re-entry handover segment for the target maintenance object based on the isolation release time and the re-entry confirmation time.

[0031] The re-establishment preemption identification module is used to determine the re-establishment preemption application based on the relationship between the subsequent work permit application time and the re-establishment handover segment.

[0032] The preemptive call processing module is used to retain the re-preemptive call request and restrict the re-preemptive call request from changing the start and end of the re-preemptive handover segment;

[0033] The continuation confirmation module is used to confirm the continuation relationship between the subsequent work permit application and the restoration confirmation time after the restoration confirmation time is formed, and to generate a subsequent work continuation confirmation record.

[0034] The technical effects and advantages of this invention are as follows:

[0035] 1. This invention forms a re-return handover segment between the isolation release time and the re-return confirmation time, and uses this re-return handover segment as the basis for judging the continuation of subsequent work permit applications. This can distinguish between the two different stages of isolation release and re-return completion, and avoid directly confirming the continuation of subsequent work based solely on the isolation release record. This reduces the risk of subsequent work entering prematurely before the target maintenance object has completed on-site re-return confirmation.

[0036] 2. This invention determines subsequent work permit applications that fall within the reset handover period by judging whether the application time falls within the reset handover period. Subsequent work permit applications that fall within the reset handover period are identified as reset emergency applications. Before the reset confirmation time is formed, subsequent work continuation confirmation records are not generated. This invention can identify and process the handover gap between the release of isolation and the reset confirmation, thereby improving the accuracy of the connection between the maintenance and reset of thermal power projects and subsequent work permits.

[0037] 3. By retaining the original permit application time of the restoration and resuming application, and restricting the original permit application time from changing the isolation release time, restoration confirmation time, and the start and end of the restoration handover segment, the present invention ensures that the restoration and resuming application will not be simply deleted or reset, nor will it affect the boundary of the restoration handover segment in the reverse. This prevents subsequent operations from being continued prematurely, while maintaining the continuity of the work permit application record and the traceability of the inspection and restoration continuation process. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0039] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0040] Figure 2 This is a schematic diagram of the system of the present invention;

[0041] Figure 3 This is a schematic diagram of the logic judgment of the present invention. Detailed Implementation

[0042] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] This invention provides, for example Figures 1-3 The intelligent operation and maintenance method for thermal power plants based on the integration of BIM and digital twins, as shown, includes the following specific steps:

[0044] Step 1: After the maintenance work of the thermal power plant is completed, obtain the isolation release time, restoration confirmation time and subsequent work permit application time corresponding to the target maintenance object;

[0045] Step 2: Based on the isolation release time and the return confirmation time, form the return handover section of the target maintenance object. The return handover section is used to characterize the handover process from the isolation release to the completion of the on-site return confirmation.

[0046] Step 3: Determine the succession relationship between the subsequent work permit application time and the return confirmation time based on the position of the subsequent work permit application time falling into the return handover period;

[0047] Step 4: When the application time for subsequent work permits falls within the return handover period, the application for subsequent work permits will be identified as a return handover application, and no subsequent work continuation confirmation record will be generated for the time being.

[0048] Step 5: Once the reset confirmation time is determined, the reset handover phase ends, and the continuity between subsequent work permit applications and reset confirmation times is re-verified.

[0049] Step 6: When the application time for subsequent work permits is not earlier than the return confirmation time, generate a subsequent work continuation confirmation record.

[0050] This method is applicable to operation and maintenance scenarios where the target maintenance object transitions from maintenance status to subsequent operation status after the completion of maintenance work in thermal power plants. The target maintenance object can be pump sets, fans, coal conveying equipment, auxiliary equipment, electrical cabinets, thermal control equipment, pipeline accessories, or other equipment or areas in thermal power plants that require maintenance isolation and re-establishment confirmation.

[0051] During on-site maintenance of thermal power plants, the target maintenance object typically needs to undergo a continuous process including maintenance isolation, maintenance work, isolation release, on-site reconfirmation, and subsequent work permits.

[0052] Specifically, the steps include the following:

[0053] Step 1: After the maintenance work on the thermal power plant is completed, obtain the isolation release time, restoration confirmation time, and subsequent work permit application time for the target maintenance object.

[0054] Specifically, the isolation release time is the time when the maintenance isolation measures corresponding to the target maintenance object are lifted and an isolation release record is formed; the re-confirmation time is the time when the target maintenance object completes on-site re-confirmation and a re-confirmation record is formed; and the subsequent work permit application time is the time when a subsequent work application is submitted for the target maintenance object and an application record is formed.

[0055] For example, after the maintenance of the feedwater pump motor of a thermal power plant is completed, an isolation release record is formed at 10:00, a return confirmation record is formed at 10:18, and the subsequent trial operation permit application is submitted at 10:08. In this case, 10:00 is the isolation release time, 10:18 is the return confirmation time, and 10:08 is the time for the subsequent operation permit application.

[0056] Step 2: Based on the isolation release time and the return confirmation time, form the return handover section for the target maintenance object.

[0057] Specifically, the isolation release time is used as the start time of the reset handover phase, and the reset confirmation time is used as the end time of the reset handover phase. The reset handover phase is used to characterize the handover process of the target maintenance object after isolation is released and before on-site reset confirmation is completed.

[0058] Taking the aforementioned water pump motor as an example, the handover period for the target maintenance object is formed between 10:00 and 10:18. This handover period indicates that although the target maintenance object has been released from isolation, the on-site handover confirmation has not yet been completed, and therefore it cannot be directly considered to have met the conditions for subsequent work.

[0059] Step 3: Determine the succession relationship between the subsequent work permit application time and the return confirmation time based on the position of the subsequent work permit application time falling into the return handover period.

[0060] Specifically, the application time for subsequent work permits is compared with the handover period. When the application time for subsequent work permits falls within the handover period, it indicates that the application occurred after the quarantine was lifted but before the handover confirmation was completed; when the application time for subsequent work permits is no earlier than the handover confirmation time, it indicates that the application occurred after the handover confirmation was completed.

[0061] In the example above, the application time for the subsequent trial operation permit is 10:08, which is within the return handover period from 10:00 to 10:18. Therefore, the application for the subsequent operation permit is earlier than the return confirmation time of the target maintenance object.

[0062] Step 4: When the application time for subsequent work permits falls within the return handover period, the application for subsequent work permits will be identified as a return handover application, and no subsequent work continuation confirmation record will be generated for the time being.

[0063] Specifically, when the application time for subsequent work permits falls within the return handover period, it indicates that the application for subsequent work permits was submitted after the isolation of the target maintenance object was lifted and before the on-site return confirmation was completed, and the application is identified as a return emergency handover application.

[0064] In the example above, the application for subsequent trial operation permit submitted at 10:08 falls within the return handover period from 10:00 to 10:18, and is therefore identified as a return emergency handover application. For this return emergency handover application, no subsequent operation continuation confirmation record will be generated, nor will it be used as evidence that the target maintenance object has completed the subsequent operation continuation.

[0065] Step 5: Once the reset confirmation time is determined, the reset handover phase ends, and the continuity between subsequent work permit applications and reset confirmation times is re-verified.

[0066] Specifically, once the target maintenance object completes on-site reset confirmation and a reset confirmation time is established, this reset confirmation time will be used as the termination condition for the reset handover phase, thus ending the reset handover phase for the target maintenance object. For reset emergency connection applications that previously fell within the reset handover phase, their original permit application time will be retained. However, the original permit application time will not change the isolation release time, reset confirmation time, or the start and end dates of the reset handover phase, nor will it serve as a basis for early termination of the reset handover phase.

[0067] Therefore, even if subsequent work permit applications are submitted in advance, the boundary of the re-entry handover phase will not be changed in the opposite direction. The re-entry handover phase will still end when the re-entry confirmation time is reached.

[0068] Step 6: When the application time for subsequent work permits is not earlier than the return confirmation time, generate a subsequent work continuation confirmation record.

[0069] Specifically, after the reset handover phase is completed, if the application time for subsequent work permits is not earlier than the reset confirmation time, a subsequent work continuation confirmation record is generated. The subsequent work continuation confirmation record is used to indicate that the target maintenance object has completed reset confirmation and that the application for subsequent work permits meets the continuation conditions.

[0070] The above method integrates the release from isolation, on-site restoration confirmation, and subsequent work permit application into a single continuation judgment process. Compared to relying solely on the isolation release record to determine whether subsequent work can proceed, the creation of a restoration handover phase distinguishes between the two stages of isolation release and restoration completion, preventing subsequent work from being mistakenly confirmed before restoration confirmation is complete.

[0071] Meanwhile, for restoration applications falling within the restoration handover period, this invention does not directly delete, reset, or regenerate the permit application record. Instead, it determines the continuity relationship after the restoration is confirmed. In particular, for subsequent work permit applications submitted in advance, this invention does not directly invalidate them. Instead, it continues to determine the continuity relationship based on the original application time after the restoration is confirmed, thereby preventing premature continuation while maintaining the continuity of work permit records. Through the BIM and digital twin-integrated operation and maintenance infrastructure, it is also possible to maintain correspondence between the target maintenance object, maintenance area, isolation point, and related time records, improving the accuracy and traceability of the restoration and subsequent work continuity in thermal power projects.

[0072] Furthermore, the return handover phase starts with the isolation release time and ends with the return confirmation time. When determining the succession relationship between subsequent work permit applications and the return confirmation time, the time of the subsequent work permit application is compared with the return handover phase. If the time of the subsequent work permit application is within the return handover phase, the subsequent work permit application is marked as a return preemptive application.

[0073] Furthermore, after marking the subsequent work permit application as a reset emergency connection application, the original permit application time of the reset emergency connection application is retained, and the reset emergency connection application is assigned to the corresponding reset handover section; before the end of the reset handover section, the reset emergency connection application is not used as the basis for the target maintenance object to complete the subsequent work connection, and the corresponding permit application record is not deleted, reset or regenerated because its application time is earlier than the reset confirmation time.

[0074] Furthermore, before the end of the re-establishment handover phase, the re-establishment application retains its original application date; the original application date is only used to determine the sequential relationship between the re-establishment application and the re-establishment handover phase, and is not used to change the isolation release time, the re-establishment confirmation time, or the start and end of the re-establishment handover phase.

[0075] Furthermore, when a reset request is made during the reset handover period, the reset request is not considered the basis for the termination of the reset handover period. The reset handover period still terminates upon the formation of the reset confirmation time.

[0076] The water pump motor will continue to be the target for maintenance. The isolation will be lifted at 10:00, the restoration confirmation will be at 10:18, and the application for subsequent trial operation permit will be at 10:08.

[0077] When forming the reset handover section, 10:00 is used as the start time of the reset handover section, and 10:18 is used as the end time of the reset handover section, thus forming a reset handover section from 10:00 to 10:18. This reset handover section is used to represent the handover process of the feedwater pump motor after the isolation is lifted and before the on-site reset confirmation is completed.

[0078] When determining the succession relationship between the subsequent trial operation permit application and the return confirmation time, the application time of 10:08 was compared with the return handover period. Since 10:08 falls between 10:00 and 10:18, i.e., within the return handover period, the subsequent trial operation permit application was marked as a return preemptive application.

[0079] After marking the subsequent trial operation permit application as a re-establishment application, the original application time of 10:08 will be retained, and the re-establishment application will be classified as part of the re-establishment handover period from 10:00 to 10:18. Before the end of this re-establishment handover period, the re-establishment application will not be used as the basis for the completion of subsequent trial operation of the feedwater pump motor, and the corresponding permit application record will not be deleted, reset, or regenerated because its application time is earlier than the re-establishment confirmation time of 10:18.

[0080] Furthermore, the original application time of 10:08 for the emergency return application is only used to determine the sequential relationship between the emergency return application and the return handover segment, and is not used to change the isolation release time of 10:00, the return confirmation time of 10:18, or the start and end time of the return handover segment. In other words, although the subsequent trial operation permit application was submitted at 10:08, this time cannot reverse the start or end time of the return handover segment, which is still defined by the isolation release time of 10:00 and the return confirmation time of 10:18.

[0081] Furthermore, if a re-entry emergency reconnection application occurs within the re-entry handover period, this application does not constitute the basis for the termination of the re-entry handover period. The re-entry handover period still terminates upon the formation of the re-entry confirmation time, specifically at 10:18. Therefore, the re-entry handover period cannot be prematurely concluded simply because the subsequent trial operation permit application was submitted at 10:08.

[0082] By using the above method, it is possible to identify when a subsequent work permit application falls into the re-handover phase in advance, while retaining the original permit application time of the application, thus avoiding simply deleting the early application or requiring resubmission; at the same time, the original permit application time cannot change the start and end of the re-handover phase, nor can it cause the re-handover phase to end in advance, thereby ensuring that the re-handover phase is always bounded by the on-site re-handover confirmation result.

[0083] Compared to directly rejecting or approving advance applications, the processing method of this invention has a more stable effect in determining the continuation of work: on the one hand, it can prevent subsequent work from being mistakenly continued before the target maintenance object has completed the return confirmation; on the other hand, it can retain the time trace of subsequent work that has submitted a continuation application, avoiding record fragmentation caused by duplicate applications. Therefore, while ensuring the safe closure of maintenance and return, it can improve the continuity of subsequent work permit records and the accuracy of continuation determination.

[0084] Furthermore, the reset confirmation time is the time when the target maintenance object completes the on-site reset confirmation and forms a reset confirmation record. On-site reset confirmation includes at least one of the following: confirmation of removal of temporary maintenance measures, confirmation of restoration of on-site markings, or confirmation of handover of maintenance area.

[0085] The confirmation of the removal of temporary maintenance measures includes on-site verification and confirmation of the removal of temporary grounding wires for the maintenance of thermal power equipment, the removal of temporary sealing parts, the removal of temporary protective facilities, and the removal of temporary test wiring.

[0086] On-site signage restoration confirmation includes the repositioning, return to place, and verification of equipment operation status warning signs, safety warning signs, isolation fence signs, and equipment number signs;

[0087] The handover confirmation of the maintenance area includes cleaning the maintenance work area, removing tools and equipment, removing maintenance personnel, and removing the maintenance isolation boundary. After that, the operation and maintenance party and the maintenance party complete the handover verification and confirmation of the equipment and work area.

[0088] Furthermore, the isolation release time is the time when the maintenance isolation measures corresponding to the target maintenance object are lifted and an isolation release record is formed; the maintenance isolation measures include at least one of tag isolation, electrical isolation, or mechanical isolation;

[0089] After the isolation release record is generated, the release completion time corresponding to the isolation release record will be used as the isolation release time.

[0090] Furthermore, the application time for subsequent work permits is the time when a follow-up application record is formed for the target maintenance object;

[0091] The application record includes the target maintenance object to be inspected and the application submission time, and the application submission time will be used as the application time for subsequent work permits.

[0092] The water pump motor will continue to be the target for maintenance. The isolation will be lifted at 10:00, the restoration confirmation will be at 10:18, and the application for subsequent trial operation permit will be at 10:08.

[0093] When determining the isolation release time, an isolation release record is generated after the maintenance isolation measures corresponding to the water pump motor are lifted. Maintenance isolation measures may include at least one of tag isolation, electrical isolation, or mechanical isolation. For example, after the water pump motor maintenance is completed, on-site personnel remove the maintenance tag corresponding to the water pump motor, restore the corresponding electrical isolation state, and lift the mechanical isolation measures corresponding to the maintenance object; when the above isolation measures are lifted and an isolation release record is generated, the release completion time corresponding to the isolation release record is taken as the isolation release time. In this invention, the release completion time is 10:00, therefore 10:00 is taken as the isolation release time for the water pump motor.

[0094] When determining the reset confirmation time, a reset confirmation record is generated after the feedwater pump motor completes the on-site reset confirmation. On-site reset confirmation may include at least one of the following: confirmation of removal of temporary maintenance measures, confirmation of restoration of on-site markings, or confirmation of handover of the maintenance area. Specifically, confirmation of removal of temporary maintenance measures may include on-site verification of the removal of temporary grounding wires, temporary sealing parts, temporary protective facilities, or temporary test wiring for maintenance; confirmation of restoration of on-site markings may include the resetting and verification of equipment operating status warning signs, safety warning signs, isolation fence markings, or equipment number markings; confirmation of handover of the maintenance area may include the cleanup of the maintenance work surface, removal of tools and equipment, evacuation of maintenance personnel, and handover verification after the removal of the maintenance isolation boundary.

[0095] For example, after the isolation of the feedwater pump motor is lifted, on-site personnel continue to remove the temporary grounding wire, clean the maintenance area, restore equipment markings, and confirm the handover of the maintenance area. After these restoration tasks are completed, a restoration confirmation record is generated, and the time corresponding to the formation of the restoration confirmation record is taken as the restoration confirmation time. In this invention, the restoration confirmation record was formed at 10:18, therefore 10:18 is taken as the restoration confirmation time for the feedwater pump motor.

[0096] When determining the application time for subsequent work permits, a follow-up application record is created for the feedwater pump motor during subsequent trial operation. This record includes the target maintenance object to be accessed and the application submission time, which is used as the application time for subsequent work permits. For example, if a follow-up application is submitted after the feedwater pump motor isolation is lifted, and the application record indicates the target to be accessed is the feedwater pump motor, with a submission time of 10:08, then 10:08 will be used as the application time for subsequent work permits.

[0097] In this way, the isolation release time, the restoration confirmation time, and the subsequent work permit application time are derived from different on-site records: the isolation release time comes from the isolation release record, the restoration confirmation time comes from the restoration confirmation record, and the subsequent work permit application time comes from the continuation application record. These three types of times are independent of each other, but all revolve around the same target maintenance object. This avoids mixing records from different stages and also avoids judging whether the target maintenance object has met the conditions for subsequent work based solely on the isolation release record.

[0098] This invention addresses the following: by clearly defining the sources of the isolation release time, restoration confirmation time, and subsequent work permit application time, it provides a clear data foundation for identifying the start and end of the restoration handover phase and the restoration emergency connection application; by limiting the restoration confirmation time to the time when the on-site restoration confirmation record is formed, it avoids mistaking isolation release for restoration completion; and by limiting the subsequent work permit application time to the application submission time in the continuation application record, it preserves the original time trace of subsequent work continuation applications. Therefore, it improves the accuracy of restoration handover phase formation, reduces the risk of mismatch between inspection and restoration records and subsequent work permit records, and enhances the traceability of the inspection and restoration continuation process in thermal power projects.

[0099] Furthermore, based on the BIM model, the spatial correspondence between the target maintenance object and the corresponding maintenance area and isolation point is determined, and based on the spatial correspondence, the target maintenance object corresponding to the isolation release time and the return confirmation time is determined.

[0100] The feedwater pump motor remains the target for maintenance. To ensure that the isolation release time and the return confirmation time both correspond to the same target maintenance object, a spatial correspondence between the feedwater pump motor, its maintenance area, and the corresponding isolation point is pre-established in the BIM model. The isolation point can be the location where maintenance isolation measures are implemented on the feedwater pump motor, and the maintenance area can be the maintenance work area surrounding the feedwater pump motor.

[0101] When obtaining the isolation release time, the BIM model is used to determine whether the isolation point that generated the isolation release record belongs to the isolation point corresponding to the water pump motor. When obtaining the restoration confirmation time, the BIM model is used to determine whether the maintenance area that generated the restoration confirmation record belongs to the maintenance area corresponding to the water pump motor. If both the isolation release record and the restoration confirmation record match the spatial relationship corresponding to the water pump motor in the BIM model, then the isolation release time and the restoration confirmation time are determined to correspond to the same target maintenance object.

[0102] For example, in the BIM model, the maintenance area corresponding to the water pump motor is Zone A, and the corresponding isolation point is Isolation Point A-1. If the isolation release record formed at 10:00 comes from Isolation Point A-1, and the restoration confirmation record formed at 10:18 comes from the maintenance area in Zone A, then it can be determined that both the isolation release time and the restoration confirmation time correspond to the water pump motor, and thus a restoration handover section for the water pump motor is formed. If adjacent equipment forms isolation release records or restoration confirmation records at close intervals, but they correspond to different isolation points or different maintenance areas, then these records will not be used for the restoration handover section of the water pump motor.

[0103] In this way, the BIM model is not used to simply display the structure of thermal power plants, but rather to confirm the correspondence between target maintenance objects, maintenance areas, and isolation points. This avoids the mixing of records from different equipment, different maintenance areas, or different isolation points, improves the accuracy of reconnection section formation, and reduces the risk of misjudgment of reconnection requests.

[0104] The intelligent operation and maintenance system for thermal power plants based on the integration of BIM and digital twins implements the aforementioned intelligent operation and maintenance method for thermal power plants based on the integration of BIM and digital twins. The system includes:

[0105] The information acquisition module is used to acquire the isolation release time, return confirmation time, and subsequent work permit application time for the target maintenance object.

[0106] The re-entry handover section forming module is used to form the re-entry handover section of the target maintenance object based on the isolation release time and re-entry confirmation time;

[0107] The re-establishment handover identification module is used to determine the re-establishment handover application based on the relationship between the subsequent work permit application time and the re-establishment handover segment;

[0108] The preemptive call processing module is used to retain re-preemptive call requests and restrict re-preemptive call requests from changing the start and end of the re-preemptive handover segment;

[0109] The continuation confirmation module is used to confirm the continuation relationship between subsequent work permit applications and the return confirmation time after the return confirmation time is formed, and to generate subsequent work continuation confirmation records.

[0110] Through the aforementioned system, each module collaboratively processes isolation release, restoration confirmation, and subsequent work permit applications around the same target maintenance object. This ensures that subsequent work continuation confirmation is no longer based solely on isolation release records, but rather on the continuation relationship established after restoration confirmation. This reduces the risk of premature continuation of subsequent work before restoration is complete, while maintaining the continuity of restoration pre-emptive applications and related maintenance records.

[0111] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for intelligent operation and maintenance of thermal power plants based on the integration of BIM and digital twins, characterized in that, The specific steps include the following: Step 1: After the maintenance work of the thermal power plant is completed, obtain the isolation release time, restoration confirmation time and subsequent work permit application time corresponding to the target maintenance object; Step 2: Based on the isolation release time and the return confirmation time, form the return handover segment of the target maintenance object. The return handover segment is used to characterize the handover process from the isolation release to the completion of on-site return confirmation. Step 3: Determine the succession relationship between the subsequent work permit application and the return confirmation time based on the position of the subsequent work permit application time falling into the return handover period; Step 4: When the application time for the subsequent work permit falls within the return handover period, the application for the subsequent work permit is identified as a return handover application, and no subsequent work continuation confirmation record is generated temporarily. Step 5: Once the reset confirmation time is reached, the reset handover phase ends, and the continuity between the subsequent work permit application and the reset confirmation time is re-verified. Step 6: When the application time for the subsequent job permit is not earlier than the return confirmation time, generate the subsequent job continuation confirmation record.

2. The intelligent operation and maintenance method for thermal power plants based on the fusion of BIM and digital twins as described in claim 1, characterized in that, The recovery handover segment starts with the isolation release time and ends with the recovery confirmation time. When determining the succession relationship between the subsequent work permit application and the recovery confirmation time, the time of the subsequent work permit application is compared with the recovery handover segment. If the time of the subsequent work permit application is within the recovery handover segment, the subsequent work permit application is marked as a recovery preemptive application.

3. The intelligent operation and maintenance method for thermal power plants based on the fusion of BIM and digital twins as described in claim 2, characterized in that, After marking the subsequent work permit application as a reset emergency connection application, the original permit application time of the reset emergency connection application is retained, and the reset emergency connection application is assigned to the corresponding reset handover segment; before the end of the reset handover segment, the reset emergency connection application is not used as the basis for the target maintenance object to complete the subsequent work connection, and the corresponding permit application record is not deleted, reset or regenerated because its application time is earlier than the reset confirmation time.

4. The intelligent operation and maintenance method for thermal power plants based on the fusion of BIM and digital twins as described in claim 1, characterized in that, The reset confirmation time is the time when the target maintenance object completes the on-site reset confirmation and forms a reset confirmation record. The on-site reset confirmation includes at least one of the following: confirmation of removal of temporary maintenance measures, confirmation of restoration of on-site markings, or confirmation of handover of maintenance area. The removal and confirmation of temporary maintenance measures includes on-site verification and confirmation of the removal of temporary grounding wires for thermal power equipment maintenance, removal of temporary sealing components, removal of temporary protective facilities, and removal of temporary test wiring. The confirmation of restoration of on-site signage includes the resetting, repositioning, and verification of equipment operation status warning signs, safety warning signs, isolation fence signs, and equipment number signs. The handover confirmation of the maintenance area includes the cleaning of the maintenance work surface, the removal of tools and equipment, the withdrawal of maintenance personnel, and the removal of the maintenance isolation boundary. After these steps, the operation and maintenance party and the maintenance party complete the handover verification and confirmation of the equipment and work area.

5. The intelligent operation and maintenance method for thermal power plants based on the fusion of BIM and digital twins as described in claim 1, characterized in that, The isolation release time is the time when the maintenance isolation measures corresponding to the target maintenance object are lifted and an isolation release record is formed; the maintenance isolation measures include at least one of tag isolation, electrical isolation, or mechanical isolation. After the isolation release record is generated, the release completion time corresponding to the isolation release record is taken as the isolation release time.

6. The intelligent operation and maintenance method for thermal power plants based on the fusion of BIM and digital twins as described in claim 1, characterized in that, The time for applying for subsequent work permits is the time when a follow-up application record is formed for the target maintenance object; The follow-up application record includes the target maintenance object to be entered and the application submission time, and the application submission time is used as the application time for the subsequent work permit.

7. The intelligent operation and maintenance method for thermal power plants based on the fusion of BIM and digital twins as described in claim 3, characterized in that, Before the end of the re-establishment handover phase, the re-establishment preemptive connection application retains its original license application time; the original license application time is only used to determine the sequential relationship between the re-establishment preemptive connection application and the re-establishment handover phase, and is not used to change the isolation release time, the re-establishment confirmation time, or the start and end of the re-establishment handover phase.

8. The intelligent operation and maintenance method for thermal power plants based on the fusion of BIM and digital twins as described in claim 1, characterized in that, Based on the BIM model, the spatial correspondence between the target maintenance object and the corresponding maintenance area and isolation point is determined, and based on the spatial correspondence, the target maintenance object corresponding to the isolation release time and the return confirmation time is determined.

9. The intelligent operation and maintenance method for thermal power plants based on the fusion of BIM and digital twins as described in claim 7, characterized in that, When the reset request occurs during the reset handover period, the reset request is not used as the basis for the end of the reset handover period. The reset handover period still ends when the reset confirmation time is reached.

10. A smart operation and maintenance system for thermal power plants based on the integration of BIM and digital twins, comprising the smart operation and maintenance method for thermal power plants based on the integration of BIM and digital twins as described in any one of claims 1 to 9, characterized in that, The system includes: The information acquisition module is used to acquire the isolation release time, return confirmation time, and subsequent work permit application time for the target maintenance object. A re-entry handover segment forming module is used to form a re-entry handover segment for the target maintenance object based on the isolation release time and the re-entry confirmation time. The re-establishment preemption identification module is used to determine the re-establishment preemption application based on the relationship between the subsequent work permit application time and the re-establishment handover segment. The preemptive call processing module is used to retain the re-preemptive call request and restrict the re-preemptive call request from changing the start and end of the re-preemptive handover segment; The continuation confirmation module is used to confirm the continuation relationship between the subsequent work permit application and the restoration confirmation time after the restoration confirmation time is formed, and to generate a subsequent work continuation confirmation record.

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