Complex stability control system strategy verification secondary safety measure generation method and system

Abstract

The invention discloses a method and a system for generating secondary safety measures for strategy verification of a complex stability control system. The system comprises an intelligent graphic recognition and analysis module, a man-machine interaction module, a channel topology processing module and an automatic safety measure generation module. Forming a structured channel topology model of the complex stability control system by intelligently identifying a channel topology structure chart of the complex stability control system; setting the state of the stability control device through a man-machine interaction module according to the maintenance plan, and establishing a typical safety measure template of the stability control device according to the level or function category of the stability control device to form a typical safety measure rule base; dividing the stability control system topology model into a maintenance device set and an operation device set through a channel topology processing module; a safety measure automatic generation module is combined with a typical safety measure rule base to automatically generate safety measures of a maintenance stability control device set, and reliable isolation of a maintenance device and an operation device is achieved.

Description

Technical Field

[0001] This invention belongs to the field of power system safe and stable operation control technology, specifically relating to a method and system for generating secondary safety measures for complex stability control system strategy verification. Background Technology

[0002] Power grid stability control devices are crucial second-line defenses for ensuring the safe operation of the power grid, playing a vital role in guaranteeing grid safety and stability, enhancing inter-regional DC transmission, and facilitating the absorption of new energy sources. With changes in the power grid structure, the probability of anomalies occurring in stability control devices and their transmission channels increases significantly, placing higher demands on their safety and reliability.

[0003] Currently, there are methods for generating safety measures for the maintenance of components in smart substations. Chinese invention patent "A Visualized Maintenance Safety Measures System and Method (Publication No. CN107203648A)" provides a maintenance safety measures system and method that visually displays the maintenance measures requiring isolation and allows for visual monitoring of the safety measures process, specifically for secondary system maintenance tasks. Chinese invention patent "Automatic Generation and Verification Method of Safety Measures Based on Safety Measures Pre-drilling (Publication No. CN110784363A)" provides an automatic generation and verification method of safety measures based on safety measures pre-drilling. During the execution of safety measures, verification technology ensures the correct and reliable implementation of safety measures, reducing potential safety hazards associated with existing secondary safety measures implementation methods in smart substations. The Chinese invention patent "One-click generation method of substation safety measure tickets based on general rule library of maintenance safety measures (publication number CN112182303A)" provides a one-click generation method of substation safety measure tickets based on general rule library of maintenance safety measures. After selecting maintenance equipment and maintenance tasks according to the actual maintenance work scenario, the method performs real-time analysis of the primary topology status of the substation.

[0004] The aforementioned technical solutions aim to improve the intelligence and automation level of safety measures in substation maintenance, enhance the reliability and accuracy of secondary safety measures, and improve the efficiency and safety of maintenance work. However, their applicable scenarios are limited to the maintenance safety measures of primary equipment components or in-station protection devices in intelligent substations, without addressing the maintenance safety measures of stability control devices, let alone reflecting the maintenance safety measures of stability control systems involving multiple sites, types, and levels. Therefore, they cannot meet the needs of maintenance work for complex stability control systems such as system protection.

[0005] Therefore, there is an urgent need for a method to generate safety measures that meet the maintenance requirements of complex stability control systems. Summary of the Invention

[0006] Purpose of the invention: In order to overcome the shortcomings and lack of scenarios in the existing technology, the present invention provides a method and system for generating secondary safety measures for strategy verification of complex stability control systems.

[0007] Technical solution:

[0008] This invention proposes a method for generating secondary safety measures for strategy verification in complex stability control systems, comprising:

[0009] Step 1: Use image recognition and OCR technology to identify feature attributes from the channel topology diagram of the complex stability control system, and use the devices in the complex stability control system as indexes to establish a structured channel topology model;

[0010] Step 2: For the structured channel topology model, set the objects and attribute parameters of the stability control devices to be maintained according to the maintenance plan, and divide the structured channel topology model into a set of maintenance devices and a set of operating devices;

[0011] Step 3: Construct a safety measure rule base, including safety measure names and corresponding descriptions; the safety measure names include data acquisition loop protection, inter-station device channel isolation, dual-set information interaction isolation, and execution station device exit isolation, and the descriptions corresponding to each safety measure name are set according to the device's level and category;

[0012] Step 4: For the segmented set of maintenance devices, match the safety measure rule base according to the device attribute parameters to generate secondary safety measure descriptions.

[0013] Furthermore, the characteristic attributes include device name, number of devices configured within the station, channel connections of dual-configuration devices, inter-station channel topology connections, channel medium, wiring relationships between converter station devices and control and protection systems and DC interface devices, device level, and device category; the device level includes control station, substation, and execution station; the device category includes traditional station devices and intelligent station devices.

[0014] Furthermore, the structured channel topology model includes:

[0015] Device parameter model: Each device corresponds to one model record, including device name, device level, device category, name of other device, status, name of dual information exchange pressure plate, and outlet identifier;

[0016] Device channel topology model: Create a record for each channel, including device name, opposite device name, and channel medium.

[0017] Furthermore, step 2 also includes:

[0018] Let set A be the label of all devices in the complex stability control system. For set A, set the status of each stability control device according to the maintenance plan, and verify the parameter model of the stability control device and the channel topology model information in the structured channel topology model. Iterate through the stability control devices A in set A. iIf the device is in the "out" state, add it to the maintenance device set A0; if the device is in the "running" state, add it to the running device set A1.

[0019] Furthermore, the descriptions corresponding to each safety measure name are set according to the device's level and category, specifically as follows:

[0020] (1) Protection measures for acquisition circuits, corresponding description: The PT and CT circuits of each station must be clearly marked to prevent accidental contact, which may cause PT short circuit and CT open circuit;

[0021] (2) Isolation measures for inter-station equipment channels, corresponding to description 1: verification<name_i> to<name_j> The pressure plates on both sides of the channel have been removed and disconnected.<name_i> to<name_j> of <channel>Channel connection;

[0022] Corresponding description 2: Verification<name_i> to<name_j> The channel pressure plate has been withdrawn and disconnected.<name_i> to<name_j> of <channel>Channel connection;

[0023] (3) Dual-set information exchange isolation measures, corresponding description: verification<name_i> of<plate_ab> The pressure plate has been removed and measures have been taken to prevent accidental dispensing.

[0024] (4) Isolation measures at the exit of the execution station device, corresponding to description 1: verification<name_i> All trip output pressure plates are in the disengaged state and measures are in place to prevent accidental activation;

[0025] Corresponding description 2: Verification<name_i> All GOOSE outlet soft pressure plates have been withdrawn and disconnected.<name_i> All direct-connect fiber optic cables must be in place and measures must be taken to prevent accidental connection.

[0026] Corresponding description 3: Disconnect<name_i> The action signal loop of the monitoring system at this station;

[0027] Where <·> are wildcard characters,<name_i> The name of the device currently being traversed.<name_j> For the name of the device opposite to the one being traversed,<plate_ab> The actual name of the pressure plate is allowed for dual-set information exchange of the currently traversed device. <channel>This is the channel name.

[0028] Furthermore, step 4 includes:

[0029] Step 4.1: Output the corresponding description of the protection of the acquisition loop;

[0030] Step 4.2: Traverse the set of maintenance devices ,like If empty, proceed directly to step 4.3; otherwise, search. The channel topology is as follows: If and or and ,at the same time The status is running. If not empty, output the corresponding description of the two sets of information interaction isolation measures; where, This represents the name of another device, automatically generated based on the identified characteristics of the stability control system. It is empty when configuring a single device. Represents the name of the currently traversed device. The name of the device opposite the currently traversed device;

[0031] Step 4.3: Search The channel topology, if For one type of equipment such as station control, pole / valve control, and backup interface device, the corresponding isolation measures for the output station device channel are described in description 2; if the device has channels with multiple devices such as station control, pole / valve control, and backup interface device and the channel medium is the same, then multiple outputs are merged;

[0032] Step 4.4: Continue the search The channel topology, if If the status is "exit", proceed directly to step 4.5; otherwise, output the inter-station device channel isolation measures according to description 1. If the device has channel connections with multiple operating devices and the channel medium is the same, then merge multiple outputs.

[0033] Step 4.5: If Yes, the output isolation measures for the output actuator device correspond to description 3; if For traditional station devices, supplement the output execution station device outlet isolation measures as described in description 1; if For intelligent station devices, supplementary description 2 is provided for the output isolation measures corresponding to the output execution station device; among which, The exit identifier represents the current traversal device. Represents the type of the currently traversed device;

[0034] Step 4.6: Complete After performing a channel topology search and automatically generating secondary safety measures, the system continues to traverse the set of maintenance devices. Proceed to the next device The channel topology search continues until all maintenance device sets have been traversed, and the secondary safety measure description is output.

[0035] This invention also proposes a generation system for verifying secondary safety measures in complex stability control systems, comprising:

[0036] The image analysis module is used to identify feature attributes from the channel topology diagram of a complex stability control system using image recognition and OCR technology, and to establish a structured channel topology model using the devices in the complex stability control system as an index.

[0037] The channel topology processing module is used to set the objects and attribute parameters of the stability control devices to be maintained according to the maintenance plan for the structured channel topology model, and to divide the complex stability control system channel topology model into a set of maintenance devices and a set of operating devices.

[0038] The human-computer interaction module is used to build a safety measure rule base, including safety measure names and corresponding descriptions; the safety measure names include data acquisition loop protection, inter-station device channel isolation, dual-set information interaction isolation, and execution station device exit isolation, and the corresponding descriptions are set according to the device's level and category.

[0039] The safety measure generation module is used to generate secondary safety measure descriptions for the segmented set of maintenance devices by matching the safety measure rule library according to the device attribute parameters.

[0040] Furthermore, the characteristic attributes include device name, number of devices configured within the station, channel connections of dual-configuration devices, inter-station channel topology connections, channel medium, wiring relationships between converter station devices and control and protection systems and DC interface devices, device level, and device category; the device level includes control station, substation, and execution station; the device category includes traditional station devices and intelligent station devices.

[0041] Furthermore, the structured channel topology model includes:

[0042] Device parameter model: Each device corresponds to one model record, including device name, device level, device category, name of other device, status, name of dual information exchange pressure plate, and outlet identifier;

[0043] Device channel topology model: Create a record for each channel, including device name, opposite device name, and channel medium.

[0044] Furthermore, the channel topology processing module also includes:

[0045] Let set A be the label of all devices in the complex stability control system. For set A, set the status of each stability control device according to the maintenance plan, and verify the parameter model of the stability control device and the channel topology model information in the structured channel topology model. Iterate through the stability control devices A in set A. i If the device is in the "out" state, add it to the maintenance device set A0; if the device is in the "running" state, add it to the running device set A1.

[0046] Beneficial effects:

[0047] This invention provides a method and system for generating secondary safety measures for strategy verification in complex stability control systems. Based on the channel structure and configuration diagram of complex stability control systems, and combined with a manually maintained general-purpose typical safety measure rule library, it automatically generates secondary safety measures for devices within the maintenance scope according to the maintenance plan of the stability control devices. This invention achieves intelligent identification of the channel topology of complex stability control systems and automatic generation of system-level secondary safety measures through image text recognition and the construction of a typical safety measure rule library. It solves the problem that the formulation of secondary safety measures for regional or subsystem-level strategy verification in the context of increasingly large-scale stability control systems such as system protection, and multiple stability control system devices and strong functional coupling, relies entirely on human experience. It achieves substantial improvements in promoting the automation and intelligence of stability control system maintenance work, improving work efficiency, and preventing incomplete or inaccurate safety measures due to human factors in the formulation of safety measures, further enhancing the level of safe and stable operation control and risk prevention capabilities of large power grids. Attached Figure Description

[0048] Figure 1 This is a flowchart of the method of the present invention;

[0049] Figure 2 (a) is a typical channel topology diagram of a complex stability control system;

[0050] Figure 2 (b) is a schematic diagram of the interface between the DC device and control and protection equipment;

[0051] Figure 3 This is a flowchart generated for secondary safety measures. Detailed Implementation

[0052] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1

[0054] This invention proposes a method for generating secondary safety measures for strategy verification in complex stability control systems. The process is as follows: Figure 1 As shown, the specific steps include:

[0055] Step 1: Based on the channel topology diagram of the complex stability control system, use image recognition and OCR technology to identify and parse the structured channel topology model of the complex stability control system.

[0056] The channel topology diagram of the stability control system should fully reflect the system's composition, configuration, and channel relationships (including inter-station channels and intra-station dual-cabinet channels). It should also clearly identify intelligent station stability control devices with control exits. For converter station stability control devices, it should also reflect their channel relationships with the intra-station DC control and protection system, backup interface devices, etc. When a device under maintenance is reused in multiple stability control systems, it should at least include all external channel relationships of that device. Typical complex stability control system channel topology diagrams and interface diagrams of DC devices and control and protection equipment are shown below. Figure 2 As shown.

[0057] The device name can be an abbreviation or the complete dispatch name, and must be unique; the number of devices configured in the station includes single or double configurations; the channel connection of dual-configuration devices includes whether there is information exchange between the two devices, indicated by "yes" or "no"; the channel medium includes optical fiber and 2M; the wiring relationship between converter station devices and control and protection systems and DC interface devices refers to the channel connection between converter station DC devices and station control system, pole / valve control system, backup interface devices, etc.

[0058] In this embodiment, the graphic and line recognition functions of professional OCR tools (such as Adobe Acrobat Pro, Tianruo OCR) or flowchart recognition software are first used to identify the... Figure 2 The rectangular shape, arrows, and connecting lines of the stability control system are shown. Text information is extracted to obtain the names of the stability control devices (including the device nodes and numbers; for "xx stability control device 1, 2", "xx stability control device" is node information, and "1, 2" is number information, automatically resolved to xx stability control device 1 and xx stability control device 2; for "xx stability control device", all are node information, no number information). "PCP" represents the extreme control system, and "SSI" represents the backup interface device. Next, the node hierarchy structure of "measuring station → control master station → control substation → execution station" is identified based on the arrow connections. Then, the connection relationships between the stability control devices are analyzed layer by layer based on the numbering information. Finally, additional feature information is added, such as "IS" for intelligent station identification, which is only valid for execution station 6 stability control device; arrows within boxes indicate channel connections between the two sets of devices; red arrows represent fiber optic channels, and black arrows represent 2M channels. The final identified stability control system structure is as follows:

[0059] ① Regarding the stability control system composition: It consists of 1 DC actuator station, 2 control master stations, 2 control substations, 2 measurement stations, and 6 actuator station stability control devices. ② Regarding the stability control device configuration: Actuators 3-6 have single-set stability control devices, while other stations have double-set devices. ③ Regarding the inter-station stability control device channels: There are channel connections between the DC actuator station and control master station 1, between the control master station and measurement stations, actuator stations 1 / 2, and control substations, between control master stations 1 / 2, and between control substations and lower-level actuator stations. ④ Regarding the intra-station stability control device channels: There is a channel connection between the two sets of cabinets in control master station 1 / 2. ⑤ Regarding the channels between converter station devices and control and protection equipment: There are channel connections between the DC actuator station and the two sets of polar control systems and backup interface devices within the station. ⑥ Regarding the channel medium: The DC actuator station is connected to control master station 1, the two sets of polar control systems, the backup interface devices, and between the two sets of cabinets in control master station 1 / 2 via fiber optic cables; all others are connected via 2M connections. ⑦ Regarding the device type: Actuator station 6 is a smart substation. ⑧ Name of the stabilization device.

[0060] Based on the identification results, a structured channel topology model is established, including a device parameter model and a device channel topology model. The device parameter model includes: device name, device level, device category, name of the other device, status, names of the two sets of information exchange pressure plates, and exit identifier. One model record is created for each device, and the identifiers and data types of each parameter record are shown in Table 1.

[0061] Table 1. Parameters of the Device Parameter Model

[0062] Serial Number Parameter name identifier Data types illustrate 1 Device Name name String The dispatch name of the stability control device is unique. 2 Device level level Menu options Multiple choice: control station, substation, or execution station 3 Device Category type Menu options Single choice: Traditional station equipment, intelligent station equipment 4 Another set of device names name_b String Automatically generated based on the identified characteristics and attributes of the stability control system; empty if it is a single configuration. 5 state status Menu options Refers to the operating status of the stability control device during strategy verification. Single selection: Running, Exit. 6 Name of dual information exchange pressure plate plate_ab String Manual settings 7 Export label commit Menu options whether

[0063] The outlet identifier indicates whether the device has an outlet pressure plate or other control loop unit. For traditional station stability control devices, a trip outlet hard pressure plate is generally configured. For intelligent station stability control devices, a GOOSE outlet soft pressure plate and a trip outlet optical fiber are generally configured.

[0064] Taking the above identification results as an example, the specific contents of the device parameter model established in this embodiment are shown in Table 2, and the device channel topology model established in this embodiment is shown in Table 3. The device level, status, dual-set information interaction pressure plate names, and exit identifiers in Table 2 cannot be directly identified and need to be maintained and set through the human-machine interface.

[0065] Table 2 Device parameter model of this embodiment

[0066] Serial Number Device Name Device level Device Category Another set of device names state Name of dual information interaction pressure plate Export label 1 Control Master Station 1 Stabilization Device 1 / Tradition Control Master Station 1 Stabilization Device 2 / / / 2 Control Master Station 1 Stabilization Device 2 / Tradition Control Master Station 1 Stabilization Device 1 / / / 3 Control Master Station 2 Stabilization Device 1 / Tradition Control Master Station 1 Stabilization Device 2 / / / 4 Control Master Station 2 Stability Control Device 2 / Tradition Control Master Station 1 Stabilization Device 1 / / / 5 Control Substation 1 Stabilization Device 1 / Tradition Control Substation 1 Stabilization Device 2 / / / 6 Control Substation 1 Stabilization Device 2 / Tradition Control Substation 1 Stabilization Device 1 / / / 7 Control Substation 2 Stabilization Device 1 / Tradition Control Substation 1 Stabilization Device 2 / / / 8 Control Substation 2 Stabilization Device 2 / Tradition Control Substation 1 Stabilization Device 1 / / / 9 Measurement Station 1 Stabilization Device 1 / Tradition Measurement Station 1 Stabilization Device 2 / / / 10 Measurement Station 1 Stabilization Device 2 / Tradition Measurement Station 2 Stabilization Device 1 / / / 11 Measurement Station 2 Stabilization Device 1 / Tradition Measurement Station 2 Stabilization Device 2 / / / 12 Measurement Station 2 Stabilization Device 2 / Tradition Measurement Station 1 Stabilization Device 1 / / / 13 DC actuator station stability control device 1 / Tradition DC actuator station stability control device 2 / / / 14 DC actuator station stability control device 2 / Tradition DC actuator station stability control device 1 / / / 15 Execution Station 1 Stabilization Device 1 / Tradition Execution Station 1 Stabilization Device 2 / / / 16 Execution Station 1 Stabilization Device 2 / Tradition Execution Station 1 Stabilization Device 1 / / / 17 Execution Station 2 Stabilization Device 1 / Tradition Execution Station 2 Stabilization Device 2 / / / 18 Execution Station 2 Stabilization Device 2 / Tradition Execution Station 2 Stabilization Device 1 / / / 19 Execution Station 3 Stabilization Device / Tradition blank / / / 20 Execution Station 4 Stabilization Device / Tradition blank / / / 21 Execution Station 5 Stabilization Device / Tradition blank / / / 22 Execution Station 6 Stabilization Device / intelligent blank / / /

[0067] Table 3 Device Channel Model of This Embodiment

[0068] Serial Number Device Name Converse device name Channel medium 1 Control Master Station 1 Stabilization Device 1 Control Master Station 1 Stabilization Device 2 optical fiber 2 Control Master Station 1 Stabilization Device 1 Control Master Station 2 Stabilization Device 1 2M 3 Control Master Station 1 Stabilization Device 1 Control Substation 1 Stabilization Device 1 2M 4 Control Master Station 1 Stabilization Device 1 Control Substation 2 Stabilization Device 1 2M 5 Control Master Station 1 Stabilization Device 1 Measurement Station 1 Stabilization Device 1 2M 6 Control Master Station 1 Stabilization Device 1 Measurement Station 2 Stabilization Device 1 2M 7 Control Master Station 1 Stabilization Device 1 Execution Station 1 Stabilization Device 1 2M 8 Control Master Station 1 Stabilization Device 1 Execution Station 2 Stabilization Device 1 2M 9 Control Master Station 1 Stabilization Device 1 DC actuator station stability control device 1 optical fiber 10 Control Master Station 2 Stabilization Device 1 Control Master Station 2 Stability Control Device 2 optical fiber 11 Control Master Station 2 Stabilization Device 1 Control Substation 1 Stabilization Device 1 2M 12 Control Master Station 2 Stabilization Device 1 Control Substation 2 Stabilization Device 1 2M 13 Control Master Station 2 Stabilization Device 1 Measurement Station 1 Stabilization Device 1 2M 14 Control Master Station 2 Stabilization Device 1 Measurement Station 2 Stabilization Device 1 2M 15 Control Master Station 2 Stabilization Device 1 Execution Station 1 Stabilization Device 1 2M 16 Control Master Station 2 Stabilization Device 1 Execution Station 2 Stabilization Device 1 2M 17 Control Master Station 2 Stabilization Device 1 DC actuator station stability control device 1 optical fiber 18 Control Substation 1 Stabilization Device 1 Execution Station 3 Stabilization Device 2M 19 Control Substation 1 Stabilization Device 1 Execution Station 4 Stabilization Device 2M 20 Control Substation 2 Stabilization Device 1 Execution Station 5 Stabilization Device 2M 21 Control Substation 2 Stabilization Device 1 Execution Station 6 Stabilization Device 2M 22 Control Master Station 1 Stabilization Device 2 Control Master Station 2 Stability Control Device 2 2M 23 Control Master Station 1 Stabilization Device 2 Control Substation 1 Stabilization Device 2 2M 24 Control Master Station 1 Stabilization Device 2 Control Substation 2 Stabilization Device 2 2M 25 Control Master Station 1 Stabilization Device 2 Measurement Station 1 Stabilization Device 2 2M 26 Control Master Station 1 Stabilization Device 2 Measurement Station 2 Stabilization Device 2 2M 27 Control Master Station 1 Stabilization Device 2 Execution Station 1 Stabilization Device 2 2M 28 Control Master Station 1 Stabilization Device 2 Execution Station 2 Stabilization Device 2 2M 29 Control Master Station 1 Stabilization Device 2 DC actuator station stability control device 2 optical fiber 30 Control Master Station 2 Stability Control Device 2 Control Substation 1 Stabilization Device 2 2M 31 Control Master Station 2 Stability Control Device 2 Control Substation 2 Stabilization Device 2 2M 32 Control Master Station 2 Stability Control Device 2 Measurement Station 1 Stabilization Device 2 2M 33 Control Master Station 2 Stability Control Device 2 Measurement Station 2 Stabilization Device 2 2M 34 Control Master Station 2 Stability Control Device 2 Execution Station 1 Stabilization Device 2 2M 35 Control Master Station 2 Stability Control Device 2 Execution Station 2 Stabilization Device 2 2M 36 Control Master Station 2 Stability Control Device 2 DC actuator station stability control device 2 optical fiber 37 Control Substation 1 Stabilization Device 2 Execution Station 3 Stabilization Device 2M 38 Control Substation 1 Stabilization Device 2 Execution Station 4 Stabilization Device 2M 39 Control Substation 2 Stabilization Device 2 Execution Station 5 Stabilization Device 2M 40 Control Substation 2 Stabilization Device 2 Execution Station 6 Stabilization Device 2M 41 DC actuator station stability control device 1 PCP1A optical fiber 42 DC actuator station stability control device 1 PCP1B optical fiber 43 DC actuator station stability control device 1 PCP2A optical fiber 44 DC actuator station stability control device 1 PCP2B optical fiber 45 DC actuator station stability control device 1 SSIA optical fiber 46 DC actuator station stability control device 1 SSIB optical fiber 47 DC actuator station stability control device 2 PCP1A optical fiber 48 DC actuator station stability control device 2 PCP1B optical fiber 49 DC actuator station stability control device 2 PCP2A optical fiber 50 DC actuator station stability control device 2 PCP2B optical fiber 51 DC actuator station stability control device 2 SSIA optical fiber 52 DC actuator station stability control device 2 SSIB optical fiber

[0069] Step 2: For the structured channel topology model of the complex stability control system, set the stability control device objects to be maintained and related attribute parameters according to the maintenance plan, and divide the channel topology model of the complex stability control system into a set of maintenance devices and a set of operating devices.

[0070] The device parameter model established above is maintained and configured through a human-computer interaction interface. The device level, names of the dual-set information interaction pressure plates, and exit identifiers can be set according to the device manual, while the status information is set according to the maintenance plan. Assuming this maintenance plan is a dual-set rotational shutdown method, i.e., taking the shutdown of the first set of devices at each station for planned maintenance as an example, the maintained device parameter model is denoted as set A. The specific contents of set A in this embodiment are shown in Table 4.

[0071] Table 4 Device Set A of this Embodiment

[0072] Serial Number Device Name Device level Device Category Another set of device names state Name of dual information interaction pressure plate Export label 1 Control Master Station 1 Stabilization Device 1 Main site Tradition Control Master Station 1 Stabilization Device 2 quit AB information exchange allows pressure plate no 2 Control Master Station 1 Stabilization Device 2 Main site Tradition Control Master Station 1 Stabilization Device 1 run AB information exchange allows pressure plate no 3 Control Master Station 2 Stabilization Device 1 Main site Tradition Control Master Station 2 Stability Control Device 2 quit AB information exchange allows pressure plate no 4 Control Master Station 2 Stability Control Device 2 Main site Tradition Control Master Station 2 Stabilization Device 1 run AB information exchange allows pressure plate no 5 Control Substation 1 Stabilization Device 1 Subsite Tradition Control Substation 1 Stabilization Device 2 quit none no 6 Control Substation 1 Stabilization Device 2 Subsite Tradition Control Substation 1 Stabilization Device 1 run none no 7 Control Substation 2 Stabilization Device 1 Subsite Tradition Control Substation 2 Stabilization Device 2 quit none no 8 Control Substation 2 Stabilization Device 2 Subsite Tradition Control Substation 2 Stabilization Device 1 run none no 9 Measurement Station 1 Stabilization Device 1 Subsite Tradition Measurement Station 1 Stabilization Device 2 quit none no 10 Measurement Station 1 Stabilization Device 2 Subsite Tradition Measurement Station 1 Stabilization Device 1 run none no 11 Measurement Station 2 Stabilization Device 1 Subsite Tradition Measurement Station 2 Stabilization Device 2 quit none no 12 Measurement Station 2 Stabilization Device 2 Subsite Tradition Measurement Station 2 Stabilization Device 1 run none no 13 DC actuator station stability control device 1 Execution Station Tradition DC actuator station stability control device 2 quit none no 14 DC actuator station stability control device 2 Execution Station Tradition DC actuator station stability control device 1 run none no 15 Execution Station 1 Stabilization Device 1 Execution Station Tradition Execution Station 1 Stabilization Device 2 quit none yes 16 Execution Station 1 Stabilization Device 2 Execution Station Tradition Execution Station 1 Stabilization Device 1 run none yes 17 Execution Station 2 Stabilization Device 1 Execution Station Tradition Execution Station 2 Stabilization Device 2 quit none yes 18 Execution Station 2 Stabilization Device 2 Execution Station Tradition Execution Station 2 Stabilization Device 1 run none yes 19 Execution Station 3 Stabilization Device Execution Station Tradition blank quit none yes 20 Execution Station 4 Stabilization Device Execution Station Tradition blank quit none yes 21 Execution Station 5 Stabilization Device Execution Station Tradition blank quit none yes 22 Execution Station 6 Stabilization Device Execution Station intelligent blank quit none yes

[0073] Traversing the stability control device in the parameter model set A If the device is in the "exit" state (i.e.) Add this device to the maintenance device set A0; otherwise, if the device is in operation (i.e., ...), Add this device to the set of operating devices A1.

[0074] Step 3: Build / improve the typical safety measure rule library based on the hierarchy and category of various devices.

[0075] The typical safety measure rule base is a general safety measure rule base. The rule base content is permanently stored and can be reused. Targeted maintenance is only required through the human-computer interaction interface when the rule base is not applicable to the current stability control system.

[0076] According to safety isolation requirements, a typical safety rule base generally includes data acquisition loop protection, inter-station device channel isolation, dual-set information exchange isolation, and execution station device exit isolation. A typical safety rule base is as follows:

[0077]

[0078] It is important to note that in a typical safety measure rule base, <·> is a wildcard identifier, containing fields that are key feature words. In actual use, these are replaced based on the devices involved in the current safety measure; other information remains fixed. Furthermore, to simplify the safety measure rule base and reduce the duplication of similar safety measures, in the safety measure description, name_i is fixed to the stabilization device of the currently defined safety measure, and name_j is the device on the opposite side with which it has a channel connection. The order may not be entirely consistent with the device channel topology model.

[0079] Step 4: For the segmented set of maintenance devices, match typical safety measure rule bases according to the features such as hierarchy and category in the device attribute parameters to automatically generate secondary safety measure descriptions. The specific flowchart is as follows: Figure 3 As shown.

[0080] Step 4-1: List the protection measures for the acquisition circuit as general requirements, and directly output "The PT and CT circuits of each station must be clearly marked to prevent accidental contact, which may cause PT short circuit and CT open circuit."

[0081] Step 4-2: Traverse the collection of maintenance devices ,like If empty, proceed to step 4-3; otherwise, search. The channel topology. If and or and This means that the names of the current stabilization device and the other stabilization device correspond one-to-one with the names of the two stabilization devices in the topology model record of a certain channel. Meanwhile... The status is "running". If not empty, output "Verification" for dual information exchange isolation measures. <name>of"<plate_ab> "The pressure plate has been removed and measures have been taken to prevent accidental dispensing."

[0082] in, This represents the name of another device, automatically generated based on the identified characteristics of the stability control system. It is empty when configuring a single device. Not a set ,or Belongs to set ; Represents the name of the currently traversed device. Represents the name of the device opposite the currently traversed device. Belongs to set ,or Not a set ; <name>,<plate_ab> All of these are wildcards. <name>Replace with the name of the device currently being traversed.<plate_ab> Replace with the actual name of the pressure plate in the dual-set information exchange allowed by the device. The device name and pressure plate name are both directly taken from the information in the device parameter model, and the same applies below.

[0083] Step 4-3: Search The channel topology, if As a type of equipment such as station control, pole / valve control, and backup interface devices, the isolation measures between the output and DC control and protection equipment must be verified. <name>to<name_j> The channel pressure plate has been withdrawn; disconnected. <name>to<name_j> of <channel>Channel connection. "If this device is connected to multiple devices (denoted as station control, pole / valve control, backup interface device, etc.)..."<name_j1> ,<name_j2> If all channels (...) have the same medium, then the output "Verify" will be merged. <name>to<name_j1> ,<name_j2> The channel pressure plate has been withdrawn; disconnected. <name>to<name_j1> ,<name_j2> ,……of <channel>Channel connection. Merging outputs makes the output text more compact in description.

[0084] Step 4-4: Continue the search The channel topology, if If the status is "Exit", proceed to steps 4-5; otherwise, output "Verification of channel isolation measures with other station operating equipment". <name>to<name_j> The pressure plates on both sides of the channel have been removed; disconnected <name>to<name_j> of <channel>Channel connection. "If the device has channel connections with multiple operating devices and the channel medium is the same, then the output will be merged." (Verification) <name>to<name_j1> ,<name_j2> The pressure plates on both sides of the channel have been removed; disconnected. <name>to<name_j1> ,<name_j2> ,……of <channel>Channel connection.

[0085] Steps 4-5: If If "Yes", then the output will be "Disconnected". <name>"To the action signal loop of this station's monitoring system." If For "traditional station equipment", then supplement the output with "verification". <name>All trip output pressure plates are in the disengaged state and measures are in place to prevent accidental activation. If it is a "smart station device", then supplement the output with "verification". <name>All GOOSE outlet soft pressure plates have been withdrawn and disconnected. <name>All direct-connect fiber optic cables must be in place and measures must be taken to prevent accidental connection. Among these, The exit identifier represents the current traversal device. Represents the type of the current traversal device.

[0086] Steps 4-6: Completed After performing a channel topology search and automatically generating secondary safety measures, the system continues to traverse the set of maintenance devices. Proceed to the next device The channel topology search continues until all maintenance device sets have been traversed.

[0087] Example 2

[0088] On the other hand, the present invention also provides a secondary safety measure generation system for complex stability control system strategy verification, comprising:

[0089] The graphic intelligent recognition and analysis module is used to intelligently identify the characteristic attributes of the stability control system based on the channel structure diagram of the stability control system using image recognition and OCR technology. These attributes include: device name, number of devices configured in the station, channel connections of dual-configuration devices, channel topology connections between stations, channel medium, wiring relationships between converter station devices and control and protection systems and DC interface devices, device level, device type, etc. Based on this, a structured channel topology model of the complex stability control system is established, using the stability control devices that constitute the stability control system as an index.

[0090] The human-machine interaction module is used to manually set the status of each stability control device during the test according to the maintenance plan (setting the status of the device to be maintained to exit and the status of the normally operating device to run), and to verify or set the parameter model and channel topology model information of the stability control device in the structured channel topology model to ensure that the relevant information is consistent with the actual stability control system; it is used to set typical safety measures rules, such as data acquisition loop protection, inter-station device channel isolation, dual-set information interaction isolation, and execution station device exit isolation, and can adjust typical safety measures according to the actual situation.

[0091] The channel topology processing module is used to process the parameter model and channel topology model information of the stability control device in the structured channel topology model. Based on the stability control device status set by the human-machine interaction module, it breaks down the devices of the complex stability control system into two sets: maintenance devices and operating devices.

[0092] The automatic safety measure generation module is used to generate safety measure descriptions for each maintenance device set, based on the typical safety measure rule library set by the manual interaction module and the discrimination logic of dual information interaction isolation, inter-station device channel isolation, and execution station device exit isolation.

[0093] Furthermore, the image intelligent recognition and parsing module is specifically used for:

[0094] When facing planned maintenance work of the stability control system, the system can automatically identify the composition, configuration and channel relationship (including inter-station channels and intra-station dual-cabinet channels) of the stability control system according to the system's structure diagram, as well as information such as whether it is an intelligent station stability control device. For converter station stability control devices, the system can also analyze the channel relationship between the stability control device and the intra-station DC control and protection system, backup interface devices and other devices.

[0095] Furthermore, the human-computer interaction module is specifically used for:

[0096] Information such as device hierarchy, status, names of dual-set information exchange pressure plates, and exit identifiers, which cannot be directly reflected in the stability control system structure diagram, are maintained and set manually through the human-machine interface module. Among them, the device hierarchy, names of dual-set information exchange pressure plates, and exit identifiers are generally derived from the device manual, while the status is derived from the maintenance plan, supporting single-set rotational shutdown, simultaneous shutdown of both sets, and combinations of both.

[0097] Based on the current status of the stability control system under maintenance, maintain typical safety measure rules to ensure reliable isolation between the stability control device under maintenance and the operating stability control device or equipment. The typical safety measure rule library contains general safety measure rules, and the content of the rule library is permanently stored and can be reused. Targeted maintenance is only required through the human-machine interface when there are rules in the current stability control system that are not applicable to the rule library.

[0098] Furthermore, the automatic safety measure generation module is specifically used for:

[0099] Search and generate secondary safety measures for each stability control device in the current maintenance and control system. First, list the protection measures for the acquisition circuit as the overall requirement, directly outputting "The PT and CT circuits of each station must be clearly marked to prevent accidental contact that could cause a PT short circuit or a CT open circuit." Second, iterate through the entire set of maintenance devices. The system determines whether the current maintenance control device is a dual-set configuration with information exchange between cabinets and another set in operation. If so, it outputs secondary safety measures to isolate the device from the other cabinet. Then, it searches for communication channels between the current maintenance control device and external control devices or equipment. If the opposite control device is in operation, it outputs secondary safety measures to isolate the device from the external control device. For converter station devices, it does not need to determine the device itself and directly outputs secondary safety measures to isolate the device from the station control, pole / valve control, and backup interface devices. If the current maintenance control device is an execution station, it outputs secondary safety measures to isolate the control device output, depending on whether it is a traditional or smart substation, ensuring that during maintenance, the unit or load is not actually disconnected due to device action signals. This cycle continues until all maintenance devices have been traversed and their secondary safety measures are automatically generated and output.< / name> < / name> < / name> < / name> < / channel> < / name> < / name> < / channel> < / name> < / name> < / channel> < / name> < / name> < / channel> < / name> < / name> < / name> < / name> < / name> < / channel> < / channel> < / channel>

Claims

1. A method for generating a complex stability control system strategy verification secondary protection, characterized in that, The method comprises the following steps: Step 1: identifying feature attributes from a channel topology structure diagram of a complex stability control system by using image recognition and OCR technology, and establishing a structured channel topology model by taking devices in the complex stability control system as indexes; Step 2: according to the structured channel topology model, setting a to-be-repaired stability control device object and a device attribute parameter according to a repair plan, and dividing the structured channel topology model into a repair device set and a running device set; Step 3: constructing a safety measure rule library, including safety measure names and corresponding descriptions; the safety measure names include acquisition loop protection, inter-station device channel isolation, double-set information interaction isolation, and execution station device outlet isolation, and the descriptions corresponding to the safety measure names are set according to device levels and categories; Step 4: for the divided repair device set, matching the safety measure rule library according to the device attribute parameter, and generating secondary safety measure descriptions.

2. The method of claim 1, wherein, The feature attributes include device names, in-station device configuration quantities, double-configuration device channel connections, inter-station channel topology connections, channel media, wiring relationships between converter station devices and control protection systems and direct current interface devices, device levels, and device categories; the device levels include control stations, sub-stations, and execution stations; and the device categories include traditional station devices and intelligent station devices.

3. The method of claim 2, wherein the secondary containment is generated by, The structured channel topology model comprises: a device parameter model: each set of devices corresponds to a model record, including a device name, a device level, a device category, another set of device names, a state, a double-set information exchange pressboard name, and an outlet identifier; a device channel topology model: each channel creates a record, including a device name, an opposite-side device name, and a channel medium.

4. The method of claim 3, wherein, The step 2 further comprises: All device labels in the complex stability control system are marked as set A; for set A, the state of the stability control device is set according to the maintenance plan one by one, and the parameter model and channel topology model information of the stability control device in the structured channel topology model are checked, and the stability control devices A in set A are traversed i If the state of the device is exit, the device is added to the maintenance device set A0; if the state of the device is running, the device is added to the running device set A1.

5. The method of claim 4, wherein, The descriptions corresponding to the safety measure names are set according to device levels and categories, and specifically: (1) acquisition loop protection measures, corresponding description: each station PT and CT loop must be marked to prevent accidental contact and cause PT short circuit and CT open circuit; (2) Inter-station device channel isolation measures, corresponding description 1: Verify that the channel press plates on both sides of <name_i> to <name_j> have been withdrawn, and disconnect <name_i> to <name_j> <channel>channel connection;< / channel> Corresponding description 2: Verify that the channel platen of <name_i> to <name_j> has exited, disconnect <name_i> to <name_j> <channel>channel connection;< / channel> (3) double-set information interaction isolation measures, corresponding description: verify that the <plate_ab> pressboard of <name_i> has been exited and good anti-misoperation measures have been taken; (4) execution station device outlet isolation measures, corresponding description 1: verify that all trip outlet pressboards of <name_i> are in an exited state and good anti-misoperation measures have been taken; corresponding description 2: verify that all GOOSE outlet soft pressboards of <name_i> have been exited, disconnect all direct trip optical fibers of <name_i>, and take good anti-misoperation measures; corresponding description 3: disconnect the action signal loop of <name_i> to the monitoring system of the station; Wherein, <·> is a wildcard, <name_i> is the current traversed device name, <name_j> is the opposite side device name of the current traversal, <plate_ab> is the actual name of the double set information exchange permission plate of the current traversed device, <channel>channel name.< / channel> 6. The method of claim 5, wherein, The step 4 comprises: Step 4.1: outputting the corresponding description of the acquisition loop protection; Step 4.2: Traverse the maintenance device set , if is empty, directly enter step 4.3; otherwise, search the channel topology of , specifically: if and or and , while the state of is running, is not empty, output the corresponding description of the double-set information interaction isolation measure; wherein represents the name of the other set of devices, which is automatically generated according to the identified stable control system characteristic attributes, and is empty when single set is configured, represents the name of the current traversed device, represents the name of the device on the opposite side of the current traversed device. Step 4.3: Search the channel topology, if is one of the station control, pole / valve control, backup interface device, etc. device, output the corresponding description 2 of the inter-station device channel isolation measures; if the device has channels with station control, pole / valve control, backup interface device, etc. multiple devices and the channel media is the same, merge multiple outputs; Step 4.4: Continue searching If the state of all the running devices in the channel topology is exit, go to Step 4.5; otherwise, output the corresponding description 1 of the inter-station device channel isolation measure, and if the device has channel contact with multiple running devices and the channel medium is the same, merge multiple outputs. If the state of all the running devices in the channel topology is exit, go to Step 4.5; otherwise, output the corresponding description 1 of the inter-station device channel isolation measure, and if the device has channel contact with multiple running devices and the channel medium is the same, merge multiple outputs. Step 4.5: If is yes, output the execution station device exit isolation measure corresponding description 3; if is a traditional station device, supplement the output execution station device exit isolation measure corresponding description 1; if is a smart station device, supplement the output execution station device exit isolation measure corresponding description 2; wherein, represents the exit identification of the current traversed device, represents the category of the current traversed device; Step 4.6: Complete the channel topology search and automatically generate the secondary containment, continue to traverse the set of maintenance devices , perform the channel topology search for the next device , until the set of maintenance devices is traversed, output the secondary containment description.

7. A system for generating secondary safety measures to verify strategies in complex stability control systems, characterized in that, The method comprises the following steps: a graphic analysis module, configured to identify feature attributes from a channel topology structure diagram of a complex stability control system by using image recognition and OCR technology, and establish a structured channel topology model by taking devices in the complex stability control system as indexes; a channel topology processing module, configured to, according to the structured channel topology model, set a to-be-repaired stability control device object and a device attribute parameter according to a repair plan, and divide a complex stability control system channel topology model into a repair device set and a running device set; The human-computer interaction module is used for constructing a safety rule library, including safety names and corresponding descriptions; the safety names include collection loop protection, inter-station device channel isolation, double-set information interaction isolation, and execution station device outlet isolation, and the corresponding descriptions are set according to device levels and categories; The safety generation module is used for generating secondary safety descriptions by matching the safety rule library according to device attribute parameters for the segmented maintenance device set.

8. The secondary containment generating system of claim 7, wherein, The characteristic attributes include device names, in-station device configuration quantities, double-configuration device channel contact, inter-station channel topology contact, channel media, wiring relationships of converter station devices and control protection systems and direct current interface devices, device levels, and device categories; the device levels include control stations, sub-stations, and execution stations; and the device categories include traditional station devices and intelligent station devices.

9. The secondary containment generating system of claim 8, wherein, The structured channel topology model includes: A device parameter model: each set of devices corresponds to a model record, including device names, device levels, device categories, another set of device names, states, double-set information exchange pressing plate names, and outlet identifiers; A device channel topology model: each channel creates a record, including device names, opposite side device names, and channel media.

10. The secondary containment generating system of claim 9, wherein, The channel topology processing module further includes: All device labels in the complex stability control system are marked as set A; for set A, the state of the stability control device is set according to the maintenance plan one by one, and the parameter model and channel topology model information of the stability control device in the structured channel topology model are checked, and the stability control devices A in set A are traversed i If the state of the device is exit, the device is added to the maintenance device set A0; if the state of the device is running, the device is added to the running device set A1.

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