A digital system for all services of power system relay protection

Abstract

This invention discloses a full-service digital system for power system relay protection, comprising: a perception layer for collecting relay protection data; a network layer connected to the perception layer for secure and reliable data transmission between different security zones, the network channels of which include a dispatch data network deployed in the production control zone, an information intranet deployed in the information management zone, a power wireless private network for tablet mobile terminal access, and internet and information management zone networks for mobile terminal access; a platform layer connected to the network layer for data aggregation, storage, processing, and service provision, including a unified data platform and a unified access control system; and an application layer connected to the platform layer for providing specific business functions, including equipment lifecycle monitoring applications, on-site full-process control applications, and professional lean management applications. This invention has the advantages of realizing full-process digitalization and intelligentization of relay protection services.

Description

Technical Field

[0001] This invention mainly relates to the field of power system automation technology, specifically to a full-service digital system for power system relay protection. Background Technology

[0002] Relay protection is the first line of defense for ensuring the safe and stable operation of the power grid. With the continuous expansion of the power grid, the number of relay protection devices has surged, increasing the complexity and requiring more sophisticated management in their operation, maintenance, and professional operation. Currently, the relay protection business faces the following prominent problems: 1. Severe system silos: The information protection system, setting calculation system, PMS system, fault recording system, etc. operate independently, forming multiple information silos with inconsistent data standards, making it difficult to share and integrate data.

[0003] 2. Low efficiency of on-site operations: On-site operations rely on paper documents and manual experience, the process is cumbersome, information transmission is slow, and the quality and efficiency of safety measures are difficult to guarantee.

[0004] 3. Passive and lagging hazard management: There is a lack of effective online detection methods for hidden defects in secondary equipment, insufficient control over the configuration files of intelligent stations, and hazard investigation relies heavily on post-event discovery, resulting in poor prevention.

[0005] 4. Difficulties in professional management collaboration: Management standards and work processes are not uniform among different professional management departments. Information transmission relies on traditional methods, and there is a lack of quantitative and transparent collaboration mechanisms and a unified work platform, resulting in low management efficiency and insufficient decision support.

[0006] There is currently no complete technical solution that can effectively solve all the above problems. Therefore, there is an urgent need for a system that can break down data barriers, cover the entire relay protection business chain, and achieve intelligent management and control. Summary of the Invention

[0007] To address the technical problems existing in the prior art, this invention provides a digital system for the entire relay protection business of a power system, which realizes the digitalization and intelligence of the entire relay protection business process.

[0008] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows: A full-service digital system for power system relay protection, comprising: The sensing layer is used to collect relay protection data. Data sources include the PMS system, the protection information system, the fault recording system, the setting calculation system, mobile terminals, and the D5000 system. The network layer, connected to the perception layer, is used to securely and reliably transmit data between different security zones. Its network channels include a scheduling data network deployed in the production control zone, an information intranet deployed in the information management zone, a power wireless private network for tablet mobile terminal access, and internet and information management zone networks for mobile terminal access. The platform layer, connected to the network layer, is used for data aggregation, storage, processing, and service provisioning, and includes a unified data platform and a unified permission system. The application layer, connected to the platform layer, provides specific business functions, including equipment lifecycle monitoring applications, on-site full-process control applications, and professional lean management applications.

[0009] Preferably, the equipment lifecycle monitoring application includes: The integrated ledger module is used to integrate PMS ledgers and insurance information ledgers, and automatically generate standardized equipment integrated ledgers and substation ledgers, and record the relay protection device model library; The status evaluation module is used to automatically evaluate the health status of relay protection devices online based on equipment operation data, defect and hidden danger data, maintenance data, and countermeasure requirements, under the established rules, so as to provide a basis for the establishment of major overhaul and technical transformation projects. The project management module is used to automatically initiate major overhaul and technical upgrade project suggestions based on equipment status evaluation results, realizing online control of the entire process from project reserve, project initiation, plan matching to execution tracking; The online monitoring module is used to display the indicator lights, soft and hard pressure plates, settings, device alarms, and waveform recording files of the relay protection device, so as to realize online monitoring of secondary equipment. The intelligent inspection module is used to automatically inspect and verify the settings, switching quantities, soft and hard pressure plate status, and analog quantities of the protection device every day. The latent defect detection module is used to collect the startup waveforms of all secondary equipment in the substation within the three-level topology range adjacent to the faulty component after a power grid fault. Through waveform recording, it performs multi-dimensional latent fault investigation on faulty and non-faulty equipment by sampling circuit, input and output, setting value, and protection channel. The hidden danger and defect module is used to record hidden dangers and defects of relay protection devices found by maintenance personnel on site, collect and summarize device hidden dangers and problems found by other application modules, and enable maintenance personnel to coordinate and manage defect rectification plans and closed-loop status, providing a basis for device status evaluation. The spare parts module is used to establish a unified ledger of spare parts inventory, model, location and status by linking with the equipment ledger. It supports inventory warning, online requisition approval, history traceability and scrapping management to ensure the supply of spare parts for on-site emergency response and maintenance operations.

[0010] Preferably, the on-site full-process control application includes: The full-process operation management module is used to realize online management and control of the entire process from operation assignment, pre-operation survey, operation document preparation and approval, to on-site safety measure implementation, filling in equipment maintenance reports, acceptance reports and carrying out professional inspections. The mobile application module, deployed on mobile terminals, supports on-site personnel in completing on-site work reports offline or online at substations, and integrates external testing equipment to achieve automatic data collection from relay protection devices during maintenance.

[0011] Preferably, the professional lean management application includes: The fault analysis module is used to automatically collect the action information and waveform files of the protection device within seconds after the power grid trips, and to perform intelligent analysis and archiving. The SCD file management module is used to summon the intelligent substation configuration file online through the information transmission technology, automatically complete the consistency verification and virtual loop logic check of the SCD / CID / CCD files, realize the online review, version control and closed-loop management of the configuration file, and ensure that the management document is consistent with the on-site operating version. The drawing and document management module is used for centralized and unified management of drawings and documents of substation secondary systems. It supports intelligent association between drawings and devices, cross-regional online sharing and rapid retrieval. The secondary system modeling module constructs a digital model of the substation's secondary circuits based on the SPD specification, enabling visual display of the secondary system, automatic generation of safety tickets, and online drawing verification. The core team module is used to establish digital files for relay protection professionals across the province, enabling the linked management of skill levels, qualification certifications, training records, and work experience. The statistical analysis module is used to aggregate various business data of relay protection, realize multi-dimensional automatic statistics and analysis of equipment status, operation execution and fault information, and provide accurate data support for professional management and analysis decision-making through visual reports and trend analysis.

[0012] Preferably, the platform layer also provides the following basic service functions: The service bus is used to enable service calls and data exchange between various application modules; Change notification service, including data change notifications between application modules and business recalculation function; The workflow approval engine supports cross-departmental and cross-level business process approvals, centralizes the approval processes of various application modules, and reminds the relevant personnel to approve via SMS and pop-up windows. User access management is used to unify the user information database and role permission configuration. Through fine-grained data scope and function operation control, a hierarchical authorization system is built to ensure system access data security and business operation compliance.

[0013] Preferably, the sensing layer is further used for: Collect protection device ledgers, action information, operating status, waveform data, and configuration files from the protection information system; Collect protection device action information and waveform data from the fault recording system; Data from the granular setting sheet of the protection device is collected from the setting calculation system; Collect protection device acceptance report data, maintenance report data, and patrol inspection report data from mobile terminals; Data on protection devices and substation records entered by maintenance personnel from the PMS system; Obtain a wiring diagram model from the scheduling system.

[0014] Preferably, the network layer is further used for: Real-time data from protection devices in the production control area is transmitted using a scheduling data network. Utilize the intranet to transmit non-real-time data such as setting sheets, substation primary wiring diagrams, and substation ledgers for the management information area. Utilize the power wireless private network to provide access channels for mobile terminals at substation sites; Utilize the internet region to provide data access and display channels for mobile terminals.

[0015] This invention also discloses a digitalization method based on the power system relay protection full-service digital system as described above, comprising the following steps: Multi-source relay protection data is collected through the sensing layer; Securely transmit data between different security partitions via the network layer; The platform layer aggregates, stores, processes, and provides services for data. The application layer enables full lifecycle monitoring of equipment, full-process on-site control, and professional lean management.

[0016] Preferably, it further includes: The PMS and the guarantee ledger are automatically matched and standardized through the integrated ledger module; The health status of the equipment is evaluated online through the status evaluation module; The hidden defect detection module enables multi-dimensional troubleshooting of hidden faults after a failure. The mobile application module enables offline or online data entry and collection for on-site operations; The SCD file management module is used to perform consistency verification and version control of configuration files. The secondary system modeling module enables digital modeling and visualization of the secondary circuits in substations.

[0017] Preferably, it further includes: Establish digital archives through the core work team module; The statistical analysis module performs multi-dimensional automatic statistics and analysis, and outputs statistical analysis results for various types of business data.

[0018] Compared with the prior art, the advantages of the present invention are as follows: This invention achieves digital coverage of the entire relay protection business chain, forming a complete closed loop from equipment management and on-site operations to professional management; it breaks down information silos through a unified data platform, enabling deep integration and sharing of multi-source data; it significantly improves on-site work efficiency and safety through mobile and online operation modes; it achieves a shift from a passive response to a proactive early warning management model through intelligent hazard detection and analysis methods; and it establishes a unified digital relay protection system, improving the standardization and collaborative efficiency of professional management. This invention features a unified architecture, comprehensive business coverage, and the ability to achieve full-process digitalization and intelligentization of relay protection operations, realizing closed-loop control and inherent safety enhancement of relay protection services. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall architecture of the digital relay protection system according to an embodiment of the present invention.

[0020] Figure 2 This is a diagram showing the composition of the application layer functional modules and their data interaction relationships in an embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 As shown in the figure, the full-service digital system for power system relay protection provided in this embodiment of the invention has a system architecture consisting of four layers from top to bottom: perception layer, network layer, platform layer and application layer; The perception layer, acting as the data source, is responsible for collecting data from various business systems, specifically including: Collect protection device ledgers, action information, operating status, waveform data, and configuration files from the protection information system; Collect protection device action information and waveform data from the fault recording system; Data from the granular setting sheet of the protection device is collected from the setting calculation system; Collect protection device acceptance report data, maintenance report data, and patrol inspection report data from mobile terminals; Data on protection devices and substation records entered by maintenance personnel from the PMS system; Obtain a wiring diagram model from the scheduling system.

[0023] The network layer is responsible for securely and reliably transmitting data between different security partitions, including: Real-time data from protection devices in the production control area is transmitted using a scheduling data network. Utilize the information intranet to transmit non-real-time data such as setting sheets, substation primary wiring diagrams, and substation ledgers issued by the management information area; The power wireless private network provides an access channel for mobile terminals at the substation site.

[0024] The Internet region provides data access and display channels for mobile terminals at substation sites.

[0025] The platform layer is the data and capability hub of the system, including: A unified data platform cleans, merges, stores, and governs multi-source heterogeneous data from the perception layer, forming a standardized data resource pool; A unified access control system enables granular management of users, roles, and functions; Basic service functions include service bus, message notification, and workflow approval engine.

[0026] The application layer, based on the data and services provided by the platform layer, constructs three core applications: Equipment lifecycle monitoring application: Focusing on the full lifecycle management of secondary equipment itself, including integrated ledger management, hidden danger and defect management, online status evaluation, overhaul and technical transformation project management, three-line online monitoring, intelligent inspection, hidden defect and fault detection, and spare parts management; On-site full-process management and control application: focusing on the standardization and mobility of on-site operations, including equipment acceptance, work assignment, pre-work survey, work document preparation and approval, secondary safety measure implementation, equipment maintenance, automatic verification of test data and professional inspection; Professional Lean Management Applications: Focusing on lean management and technical support within a specific profession, including intelligent fault diagnosis, online control of SCD files, drawing and document management, core team management, digital modeling of secondary systems, and statistical analysis.

[0027] Specifically, such as Figure 2 As shown, equipment lifecycle monitoring applications include: The integrated ledger module acquires the PMS system ledger of protection devices, the device ledger of the protection information system, the granular setting sheet of the setting system, and the device maintenance record of the mobile terminal through the digital system. This module integrates the PMS ledger and the protection information ledger, and generates standardized equipment integrated ledger and substation ledger through automatic matching. It also associates the device ledger with the setting sheet and maintenance record, records the relay protection device model library, and finally generates a ledger library and model library that records substation information and protection device information. The status evaluation module obtains protection device ledgers, maintenance records, and hidden defects through the digital system. Based on defect and hidden defect data, maintenance data, equipment operation data, and countermeasure requirements, it automatically evaluates the health status of relay protection devices online under known rules. Finally, it generates the status evaluation results of protection devices and feeds them back to the full-service digital system of relay protection, providing a basis for major overhaul and technical transformation project initiation. The project management module obtains the protection device ledger and status evaluation results through the digital system, automatically generates overhaul and technical renovation project proposals, obtains overhaul plans, and realizes online control of the entire process from project reserve, project initiation, plan matching to execution tracking.

[0028] The online monitoring module acquires protection device ledgers, device operation data from the protection information system, and substation primary wiring diagrams from the D5000 dispatch system through a digital system. It is used to display and output key information such as the operating status of relay protection devices, indicator lights, soft and hard pressure plates, settings, device alarms, and waveform recording files, thereby realizing online monitoring of secondary equipment.

[0029] The intelligent inspection module acquires protection device ledgers, granular setting sheets from the setting system, and device operation data from the protection information system through a digital system. It is used to automatically inspect and verify the daily operation data of protection devices, including settings, switching quantities, soft and hard plate status, and analog quantities. Finally, it outputs inconsistencies between device operation settings and setting sheets, abnormal states of switching quantities and soft and hard plate, and abnormally sampled analog quantities.

[0030] The latent defect detection module acquires protection device ledgers, device action reports from the protection information system, waveform files, and setting sheets from the setting system through a digital system. After a power grid fault, it collects startup waveforms of all secondary equipment in the substation within the adjacent three-level topology range of the faulty component. Through waveform recording, it performs multi-dimensional latent fault investigation on faulty and non-faulty equipment, including sampling circuits, inputs and outputs, settings, and protection channels, and finally outputs device defect information.

[0031] The hidden danger and defect module obtains the protection device ledger and hidden danger and defect records through the digital system. It is used to manage the hidden dangers and defects of relay protection devices found by maintenance personnel on site, collect and summarize the device hidden dangers and problems found by other application modules, and enable maintenance personnel to coordinate and manage the defect rectification plan and closure status. Finally, it outputs the hidden danger and defect rectification plan and closure status, providing a basis for device status evaluation.

[0032] The spare parts module obtains the protection device ledger through the digital system, establishes a unified ledger of spare parts inventory, model, location and status and associates it with the protection devices. It supports inventory warning, online requisition approval, history traceability and scrapping management, ensures the supply of spare parts for on-site emergency response and maintenance operations, and finally outputs information such as spare parts ledger, allocation record and usage frequency.

[0033] Specifically, the application of on-site full-process control includes: The full-process operation management module obtains on-site work plans through a digital system, enabling the management of work assignment, pre-work survey, work document preparation and approval, on-site safety measures implementation, and querying of maintenance reports, acceptance reports and professional inspection reports.

[0034] The mobile application module obtains protection device ledgers, maintenance, acceptance, and inspection tasks through the digital system. The module is deployed on mobile terminals such as mobile phones and tablets, allowing on-site personnel to complete on-site maintenance, acceptance, and inspection reports offline or online at the substation. It also integrates external testing equipment to automatically collect data from the relay protection devices during maintenance, and finally outputs maintenance, acceptance, and inspection records and reports to the digital system.

[0035] Specifically, professional lean management applications include: The fault analysis module obtains protection device ledgers, device action messages and waveform files from the protection information system through the digital system. It is used to automatically collect protection device action information and waveform files within seconds after the power grid trips, perform intelligent analysis, and finally output the trip analysis results to the digital system and archive them.

[0036] The SCD file management module acquires configuration files such as SCD, CCD, and CID files from protection device ledgers, substation ledgers, and the information management system through a digital system. It automatically performs consistency checks and virtual loop logic verification on the SCD, CID, and CCD files, enabling online review, version control, and closed-loop management of configuration files. This ensures consistency between the management documents and the on-site operating version, reducing potential configuration file issues. Finally, it outputs the smart substation configuration file consistency and virtual loop verification results, along with management records, to the digital system. The drawing and document management module obtains protection device ledgers and substation ledgers through the digital system. It is used by maintenance personnel to upload blueprints, white drawings, manuals and other drawing data sets of substation secondary systems. The module realizes the association of drawing data, supports intelligent association between drawings and devices, cross-regional online sharing and rapid retrieval. Finally, it outputs blueprints, white drawings and manuals of associated protection devices and substations to the digital system, solving the problems of easy loss of paper drawings and inconvenience of reading, and improving the efficiency of data utilization and the convenience of operation and maintenance.

[0037] The secondary system modeling module acquires protection device ledgers, substation ledgers, and drawing data through the digital system. Based on SPD specifications and blueprints, white drawings, and other drawing data, it constructs a digital model of the substation's secondary circuits and finally outputs the digital model of the substation to the digital system. This enables the visualization of the secondary system, automatic generation of safety tickets, and online drawing verification, thereby improving the efficiency of drawing management and the level of on-site operation safety.

[0038] The core team module uses a digital system to acquire personnel information and organize technical upgrades. It is used to establish digital files for relay protection professionals across the province, enabling the linked management of skill levels, qualification certifications, training records, and work experience. Ultimately, it outputs personnel capacity, work arrangements, and work experience.

[0039] The statistical analysis module acquires basic data on various relay protection services through a digital system, enabling multi-dimensional automatic statistics and analysis of key indicators such as equipment status, operation execution, and fault information. Through visualized reports and trend analysis, it provides accurate data support for professional management and analytical decision-making, and ultimately outputs statistical analysis results of various business data to improve management efficiency.

[0040] All data generated by all modules ultimately flows back to the platform layer's data resource pool for use by other modules, forming a closed data loop. The platform layer enables service calls and data exchange between application modules through a service bus, provides data change notifications and personnel SMS reminders through a message notification service, and supports cross-departmental business process approvals through a workflow approval engine.

[0041] Specifically, the platform layer also provides the following basic service functions: The service bus is used to enable service calls and data exchange between various application modules; Change notification service, including data change notifications between application modules and business recalculation function; The workflow approval engine supports cross-departmental and cross-level business process approvals, centralizes the approval processes of various application modules, and reminds the relevant personnel to approve via SMS, pop-ups, and other means. User access management is used to unify the user information database and role permission configuration. Through fine-grained data scope and function operation control, a hierarchical authorization system is built to ensure system access data security and business operation compliance.

[0042] The digital system of this invention adopts a cloud computing-based microservice architecture. Data from various data sources in the perception layer are pushed to or collected by the platform layer from the cloud environment via dedicated forward or reverse isolation devices and corresponding network channels. The platform layer uses a distributed database for data storage and leverages data platform technology for data modeling and service encapsulation. Each functional module in the application layer is independently developed, deployed, and extended in the form of microservices, communicating and exchanging data through the platform layer's service bus. Mobile applications utilize the microservice APIs published by the platform layer to display and operate various business functions on mobile devices.

[0043] In practical implementation, the digital system of the present invention achieves key functions in the following ways: 1. The integrated ledger automatically links equipment information from the PMS and insurance information systems through a data matching algorithm to establish a unique identifier for each device; 2. Intelligent inspection achieves automatic comparison of parameters such as set values ​​and pressure plates by configuring a verification rule base; 3. Latent defect detection identifies secondary circuit anomalies through waveform feature extraction and comparison algorithms; 4. SCD file management utilizes modeling tools and verification rules to achieve online verification of configuration files; 5. The mobile application uses offline caching technology to ensure normal use in areas with poor network signal.

[0044] The various functional modules of the system of the present invention can be implemented individually or in combination. Those skilled in the art can choose an appropriate combination method according to actual needs.

[0045] This invention achieves digital coverage of the entire relay protection business chain, forming a complete closed loop from equipment management and on-site operations to professional management; it breaks down information silos through a unified data platform, enabling deep integration and sharing of multi-source data; it significantly improves on-site work efficiency and safety through mobile and online operation modes; it achieves a shift from a passive response to a proactive early warning management model through intelligent hazard detection and analysis methods; and it establishes a unified digital relay protection system, improving the standardization and collaborative efficiency of professional management. This invention features a unified architecture, comprehensive business coverage, and the ability to achieve full-process digitalization and intelligentization of relay protection operations, realizing closed-loop control and inherent safety enhancement of relay protection services.

[0046] This invention also provides a digitalization method based on the power system relay protection full-service digital system described above, comprising the following steps: Multi-source relay protection data is collected through the sensing layer; Securely transmit data between different security partitions via the network layer; The platform layer aggregates, stores, processes, and provides services for data. The application layer enables full lifecycle monitoring of equipment, full-process on-site control, and professional lean management.

[0047] In addition, it also includes: The PMS and the guarantee ledger are automatically matched and standardized through the integrated ledger module; The health status of the equipment is evaluated online through the status evaluation module; The hidden defect detection module enables multi-dimensional troubleshooting of hidden faults after a failure. The mobile application module enables offline or online data entry and collection for on-site operations; The SCD file management module is used to perform consistency verification and version control of configuration files. The secondary system modeling module enables digital modeling and visualization of substation secondary circuits. Establish digital archives through the core work team module; The statistical analysis module performs multi-dimensional automatic statistics and analysis, and outputs statistical analysis results for various types of business data.

[0048] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A full-service digital system for power system relay protection, characterized in that, include: The sensing layer is used to collect relay protection data. Data sources include the PMS system, the protection information system, the fault recording system, the setting calculation system, mobile terminals, and the D5000 system. The network layer, connected to the perception layer, is used to securely and reliably transmit data between different security zones. Its network channels include a scheduling data network deployed in the production control zone, an information intranet deployed in the information management zone, a power wireless private network for tablet mobile terminal access, and internet and information management zone networks for mobile terminal access. The platform layer, connected to the network layer, is used for data aggregation, storage, processing, and service provisioning, and includes a unified data platform and a unified permission system. The application layer, connected to the platform layer, provides specific business functions, including equipment lifecycle monitoring applications, on-site full-process control applications, and professional lean management applications.

2. The full-service digital system for power system relay protection according to claim 1, characterized in that, The equipment lifecycle monitoring application includes: The integrated ledger module is used to integrate PMS ledgers and insurance information ledgers, and automatically generate standardized equipment integrated ledgers and substation ledgers, and record the relay protection device model library; The status evaluation module is used to automatically evaluate the health status of relay protection devices online based on equipment operation data, defect and hidden danger data, maintenance data, and countermeasure requirements, under the established rules, so as to provide a basis for the establishment of major overhaul and technical transformation projects. The project management module is used to automatically initiate major overhaul and technical upgrade project suggestions based on equipment status evaluation results, realizing online control of the entire process from project reserve, project initiation, plan matching to execution tracking; The online monitoring module is used to display the indicator lights, soft and hard pressure plates, settings, device alarms, and waveform recording files of the relay protection device, so as to realize online monitoring of secondary equipment. The intelligent inspection module is used to automatically inspect and verify the settings, switching quantities, soft and hard pressure plate status, and analog quantities of the protection device every day. The latent defect detection module is used to collect the startup waveforms of all secondary equipment in the substation within the three-level topology range adjacent to the faulty component after a power grid fault. Through waveform recording, it performs multi-dimensional latent fault investigation on faulty and non-faulty equipment by sampling circuit, input and output, setting value, and protection channel. The hidden danger and defect module is used to record hidden dangers and defects of relay protection devices found by maintenance personnel on site, collect and summarize device hidden dangers and problems found by other application modules, and enable maintenance personnel to coordinate and manage defect rectification plans and closed-loop status, providing a basis for device status evaluation. The spare parts module is used to establish a unified ledger of spare parts inventory, model, location and status by linking with the equipment ledger. It supports inventory warning, online requisition approval, history traceability and scrapping management to ensure the supply of spare parts for on-site emergency response and maintenance operations.

3. The full-service digital system for power system relay protection according to claim 1, characterized in that, The on-site full-process control application includes: The full-process operation management module is used to realize online management and control of the entire process from operation assignment, pre-operation survey, operation document preparation and approval, to on-site safety measure implementation, filling in equipment maintenance reports, acceptance reports and carrying out professional inspections. The mobile application module, deployed on mobile terminals, supports on-site personnel in completing on-site work reports offline or online at substations, and integrates external testing equipment to achieve automatic data collection from relay protection devices during maintenance.

4. The full-service digital system for power system relay protection according to claim 1, 2, or 3, characterized in that, The aforementioned professional lean management applications include: The fault analysis module is used to automatically collect the action information and waveform files of the protection device within seconds after the power grid trips, and to perform intelligent analysis and archiving. The SCD file management module is used to summon the intelligent substation configuration file online through the information transmission technology, automatically complete the consistency verification and virtual loop logic check of the SCD / CID / CCD files, realize the online review, version control and closed-loop management of the configuration file, and ensure that the management document is consistent with the on-site operating version. The drawing and document management module is used for centralized and unified management of drawings and documents of substation secondary systems. It supports intelligent association between drawings and devices, cross-regional online sharing and rapid retrieval. The secondary system modeling module constructs a digital model of the substation's secondary circuits based on the SPD specification, enabling visual display of the secondary system, automatic generation of safety tickets, and online drawing verification. The core team module is used to establish digital files for relay protection professionals across the province, enabling the linked management of skill levels, qualification certifications, training records, and work experience. The statistical analysis module is used to aggregate various business data of relay protection, realize multi-dimensional automatic statistics and analysis of equipment status, operation execution and fault information, and provide accurate data support for professional management and analysis decision-making through visual reports and trend analysis.

5. The full-service digital system for power system relay protection according to claim 1, 2, or 3, characterized in that, The platform layer also provides the following basic service functions: The service bus is used to enable service calls and data exchange between various application modules; Change notification service, including data change notifications between application modules and business recalculation function; The workflow approval engine supports cross-departmental and cross-level business process approvals, centralizes the approval processes of various application modules, and reminds the relevant personnel to approve via SMS and pop-up windows. User access management is used to unify the user information database and role permission configuration. Through fine-grained data scope and function operation control, a hierarchical authorization system is built to ensure system access data security and business operation compliance.

6. The full-service digital system for power system relay protection according to claim 1, 2, or 3, characterized in that, The sensing layer is also used for: Collect protection device ledgers, action information, operating status, waveform data, and configuration files from the protection information system; Collect protection device action information and waveform data from the fault recording system; Data from the granular setting sheet of the protection device is collected from the setting calculation system; Collect protection device acceptance report data, maintenance report data, and patrol inspection report data from mobile terminals; Data on protection devices and substation records entered by maintenance personnel from the PMS system; Obtain a wiring diagram model from the scheduling system.

7. The full-service digital system for power system relay protection according to claim 1, 2, or 3, characterized in that, The network layer is also used for: Real-time data from protection devices in the production control area is transmitted using a scheduling data network. Utilize the intranet to transmit non-real-time data such as setting sheets, substation primary wiring diagrams, and substation ledgers for the management information area. Utilize the power wireless private network to provide access channels for mobile terminals at substation sites; Utilize the internet region to provide data access and display channels for mobile terminals.

8. A digital method for a full-service digital system for power system relay protection based on any one of claims 1-7, characterized in that, Includes the following steps: Multi-source relay protection data is collected through the sensing layer; Securely transmit data between different security partitions via the network layer; The platform layer aggregates, stores, processes, and provides services for data. The application layer enables full lifecycle monitoring of equipment, full-process on-site control, and professional lean management.

9. The digitization method according to claim 8, characterized in that, Also includes: The PMS and the guarantee ledger are automatically matched and standardized through the integrated ledger module; The health status of the equipment is evaluated online through the status evaluation module; The hidden defect detection module enables multi-dimensional troubleshooting of hidden faults after a failure. The mobile application module enables offline or online data entry and collection for on-site operations; The SCD file management module is used to perform consistency verification and version control of configuration files. The secondary system modeling module enables digital modeling and visualization of the secondary circuits in substations.

10. The digitization method according to claim 8, characterized in that, Also includes: Establish digital archives through the core work team module; The statistical analysis module performs multi-dimensional automatic statistics and analysis, and outputs statistical analysis results for various types of business data.

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