A smart monitoring system for power grid information

Abstract

This invention proposes an intelligent power grid information monitoring system, comprising: a monitoring module, an active monitoring module, and a station-wide monitoring module. The monitoring module reads key monitoring tasks published in the dispatch cloud platform in real time. Once a task is detected, it initiates the key monitoring task and registers the corresponding record in the Power Management System (PMS). When dispatching ends risk control, the key monitoring task ends, and the PMS record is completed, forming a closed-loop management system. The active monitoring module allows users to add key monitoring tasks independently. It uses the unique identifier of each substation's telemetry data to filter monitoring objects and supports users modifying the threshold of monitoring objects to achieve monitoring under different limits. The station-wide monitoring module focuses on monitoring abnormal signals at the substation level, allowing for the collection of signals from corresponding substations sent to the cloud platform. It also allows the establishment of a signal alarm database corresponding to the work content and verification with the collected signals.

Description

Technical Field

[0001] This invention relates to the technical fields of power monitoring systems and smart grids, and in particular to a smart monitoring system for power grid information. Background Technology

[0002] Today, the power grid is gradually developing towards a smart grid. The power grid consists of three units: substation, transmission, and distribution. The "substation" is composed of transformers, circuit breakers, disconnect switches, and other auxiliary equipment. Only when the substations operate safely and stably can they play a vital role in the development of the smart grid.

[0003] With economic development and the ever-increasing electricity consumption of residents and businesses, the power grid is expanding, and the number of power grid devices is also increasing. During power grid operation, the amount of data and signals collected regarding the operating status of equipment is growing exponentially, as is the amount of data and signals that monitors need to monitor. To ensure the stable operation of the power grid, planned maintenance is carried out on power grid equipment. During maintenance, the load on some transformers may increase. During this period, monitors need to focus on monitoring the load operation of transformers to prevent them from overloading and increasing the risk of power grid instability. In specific seasons, such as the rainy Spring Festival and summer, hydropower stations generate more power and connect to the grid, leading to increased load rates on some transformers. During these periods, monitors need to focus on monitoring transformers with high load rates. If the load rate continues to rise, the dispatch center needs to be notified to transfer the load to ensure stable equipment operation. To ensure the safe and stable operation of equipment within the substation, substation maintenance personnel need to regularly maintain and rotate the equipment. During this period, some abnormal signals may be generated due to on-site work, which will be sent to the monitoring system's event viewing window. After the work is completed, the substation maintenance personnel need to check all the signals with the monitor. Only after there are no abnormal signals can the substation maintenance personnel leave the substation.

[0004] Currently, during planned equipment maintenance, dispatchers issue risk warnings, prompting monitors to focus on monitoring designated transformers. Due to the continuous expansion of the power grid, the amount of data and signals requiring monitoring during grid operation is increasing exponentially, and the number of devices requiring focused monitoring is also constantly growing. Current monitoring systems cannot centrally monitor all the data and signals requiring focused monitoring; instead, manual operation of the monitoring system is necessary to view these data and signals, consuming significant manpower and resources, and failing to detect anomalies promptly. During the rainy season, transformers are often overloaded due to increased power generation from hydropower stations and increased grid connection. After reporting to dispatch, monitors still need to observe the load rate. However, while handling abnormal signals from other substations, monitors cannot grasp the load rate of overloaded transformers, thus preventing real-time monitoring and the observation of load rate change curves for overloaded transformers. While substation maintenance personnel are working within the station, they will inform the monitoring operator. However, abnormal signals generated during their work are often uploaded to the monitoring system's event view window along with other abnormal signals, resulting in a cluttered signal pool. When checking signals after work, it is easy to miss abnormal signals that have not been reverted. If the monitoring system's human-machine interface crashes during the operators' work, the history of the monitoring system's event view window will be cleared after the system is restarted, making it impossible to view the abnormal signals generated during the operators' work. The operators can only check the abnormal signals one by one at intervals on the monitoring system's human-machine interface, which takes several times longer than before the human-machine interface crashes, and it is easy to miss signals that have not been reverted.

[0005] How to monitor the load of designated transformers in real time during maintenance, how to monitor the load rate of heavily loaded transformers in special seasons, and how to monitor abnormal signals caused by the work of operators, and how to verify the signals after the work is completed to ensure that no abnormal signals are left behind, so as to ensure the safe and stable operation of the power grid, are urgent problems to be solved. Summary of the Invention

[0006] In view of the defects and shortcomings of existing technologies, this invention proposes an intelligent monitoring system for power grid information.

[0007] The specific technical solution adopted is as follows:

[0008] A smart monitoring system for power grid information,

[0009] Includes: monitoring module, active monitoring module, and full-site monitoring module;

[0010] The monitoring module is used to read the key monitoring tasks published in the scheduling cloud platform in real time. Once a key monitoring task is detected, it will be carried out and the corresponding record will be registered in the PMS. When the scheduling ends and risk control is completed, the key monitoring task will be terminated and the record in the PMS will be completed, forming a closed-loop management.

[0011] The active monitoring module allows users to add key monitoring tasks independently; it uses the unique identifier point number of telemetry data from each substation to filter monitoring objects, and supports users to modify the threshold of the monitoring objects to monitor the objects under different limits.

[0012] The full-station monitoring module focuses on monitoring abnormal signals at the substation level. It allows for the collection and display of abnormal signals uploaded to the cloud platform from corresponding substations. It also allows for the establishment of a signal alarm database corresponding to the work content, which is used to verify the signals collected during the on-site work. When a signal generated during on-site work is found to exist in the signal alarm database, an early warning is issued.

[0013] Furthermore, the system connects to a cloud platform, external devices, and a production management system (PMS); the external devices include at least alarm devices and a direct dialing telephone system; and the PMS is used to register key monitoring records for future reference.

[0014] Furthermore, the workflow of the monitoring module includes:

[0015] 1. Perform initialization, set access to the cloud platform database to read-only permission, and prohibit operations on the cloud platform database; set access permissions to the PMS database to read and write permissions, which are used to register key monitoring records;

[0016] 2. Access the control cloud platform database and read the application form;

[0017] 3. Verify each power outage operation ticket on the application form to determine whether the monitoring team needs to monitor the transformer to prevent overload, and determine whether the key monitoring task should be performed.

[0018] 4. When there is a need to perform key monitoring tasks, record the dispatch instructions of the power outage operation ticket and the substation and main transformer in the monitoring task. Determine whether the application form has been registered in the PMS. If it has been registered, do not register it again. Otherwise, register a key monitoring record in the PMS. Enter the PMS database and record the registration time as the current time. Record the content as: During the dispatch instruction period, the main transformer of the monitored substation will not be overloaded.

[0019] 5. Locate the load rate η of the corresponding main transformer in the cloud platform database, display it, and show the real-time curve of the load rate η; obtain the adjustable load rate threshold η corresponding to the main transformer. thr When the load rate η exceeds the threshold η thr An alarm will be generated when the load rate is below the threshold η. thr If so, then cancel the alarm;

[0020] 6. Check whether a risk warning has been issued and the power supply operation ticket has ended in the application form. If so, complete the PMS record to achieve closed-loop record management. If no risk warning has been issued and the operation ticket has ended, return to step 5.

[0021] 7. If you choose to abort the execution, exit; otherwise, return to step 3.

[0022] Furthermore, the workflow of the active monitoring module includes:

[0023] 1. Perform initialization, setting access to the cloud platform database to read-only permission and prohibiting operations on the cloud platform database;

[0024] 2. Add key monitoring tasks to acquire data of the monitored objects in real time and plot real-time curves;

[0025] 3. Set the initial threshold for the monitored objects;

[0026] 4. Determine whether the data of the monitored task exceeds the threshold. If so, issue an alarm; otherwise, do not issue an alarm.

[0027] 5. If you choose to end the key monitoring task, the monitored objects will be cleared and the monitoring task will end; otherwise, proceed to step 5.

[0028] 6. Determine whether the monitoring threshold of the monitored object has been modified. If the threshold has been modified, check whether the monitored data exceeds the new threshold. If the threshold has not been modified, return to step 4 to check whether the monitored data exceeds the threshold before modification.

[0029] Furthermore, the specific workflow of the whole-site monitoring module includes:

[0030] 1. Perform initialization, setting access to the cloud platform database to read-only permission and prohibiting operations on the cloud platform database;

[0031] 2. Add substations as key monitoring targets;

[0032] 3. Collect and display signals uploaded to the cloud platform during monitoring, and compile statistics including the time and status information of actions;

[0033] 4. Determine if the signal obtained in step 3 exists in the signal alarm database. If it exists, an alarm will be triggered. If it does not exist in the signal alarm database, no alarm will be triggered, and the process will return to step 3 to continue collecting and displaying signals.

[0034] 5. After the on-site work is completed and the maintenance personnel have verified that the signals are correct, select to end the key monitoring.

[0035] Furthermore, the outputs of the monitoring module, the active monitoring module, and the whole-site monitoring module are displayed in three different areas;

[0036] The monitoring module and the active monitoring module display at least the following: substation name, main transformer number, real-time load rate, load rate threshold, and load curve graph of load rate data retrieval; and calculate the maximum load rate, the time of maximum load rate, and the maximum current; when the real-time load rate exceeds the load rate threshold, an alarm is triggered, and a record of key monitoring is registered in the PMS.

[0037] Furthermore, the display of the full-station monitoring module includes at least: substation name, on-site work content, work start time, sequence number, item name, time, and action / reset information.

[0038] Compared with existing technologies, the present invention and its preferred embodiment enable real-time monitoring of the load status of transformers that require key monitoring, monitoring the load rate of transformers after overload in special seasons, and monitoring abnormal signals generated by operators. It also enables good signal verification after the work is completed and leaves no abnormal signals behind. Attached Figure Description

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0040] Figure 1 This is an overall structural diagram of the peripheral components involved in the system of this embodiment of the invention;

[0041] Figure 2 This is a schematic diagram of the main modules of the system according to an embodiment of the present invention;

[0042] Figure 3 This is a flowchart illustrating the automatic monitoring process of an embodiment of the present invention;

[0043] Figure 4 This is a flowchart illustrating the active monitoring process of an embodiment of the present invention;

[0044] Figure 5 This is a flowchart illustrating the full-site monitoring workflow of an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the system interface according to an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of the load curve in an embodiment of the present invention;

[0047] Figure 8 This is a schematic diagram illustrating automatic monitoring and active monitoring alarms in an embodiment of the present invention;

[0048] Figure 9 This is a schematic diagram of the full-site monitoring function in an embodiment of the present invention;

[0049] Figure 10 This is the signal alarm library setting interface for an embodiment of the present invention. Detailed Implementation

[0050] In the following, specific embodiments of this application will be described in detail with reference to the accompanying drawings. Based on these detailed descriptions, those skilled in the art will be able to clearly understand and implement this application. Without departing from the principles of this application, features from various embodiments can be combined to obtain new implementations, or certain features from some embodiments can be substituted to obtain other preferred implementations.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] To make the features and advantages of this patent more apparent and understandable, specific embodiments are provided below for detailed explanation:

[0053] The structural block diagram of the peripheral components involved in the system of this invention is as follows: Figure 1 As shown, its functionality involves a power grid control cloud platform (hereinafter referred to as the cloud platform), external devices, a production management system (PMS), and temporarily released key monitoring data and signals. External devices include, but are not limited to, alarm systems, and also include direct-dial telephone systems for contacting external units. The PMS is used to register key monitoring records for future reference. Temporarily released key monitoring data and signals refer to important data and signals received by the monitor that require real-time monitoring, as well as data and signals encountered by the monitor in their daily work that require monitoring.

[0054] The system design of this invention mainly includes three modules: automatic monitoring, active monitoring, and whole-site monitoring. The overall system functions are as follows: Figure 2 As shown.

[0055] Automatic monitoring refers to the system's ability to read key monitoring tasks issued by dispatchers in the scheduling cloud platform in real time. Once a key monitoring task is detected, the system will automatically perform the monitoring and record a record in the PMS. When the risk control is completed, the key monitoring task ends, and the PMS record is automatically closed, forming a closed-loop management system. Its workflow diagram is as follows: Figure 3 As shown, the workflow is as follows:

[0056] 1. The automatic monitoring module initializes. During the initialization process, it needs to access the cloud platform's database. To prevent modification of the cloud platform's database content and data corruption, the authorized access permissions need to be set to read-only to prohibit operations on the cloud platform's database. At the same time, it also needs to log in to the PMS database and enable read and write operations on the database to prepare for the subsequent automatic registration of key monitoring records.

[0057] 2. The system automatically accesses the control cloud platform database and reads today's application forms;

[0058] 3. Verify each power outage operation ticket on the application form to determine whether the monitoring team needs to monitor the transformer to prevent overload, i.e., whether the monitoring personnel need to perform key monitoring tasks.

[0059] 4. When a monitoring officer needs to perform a key monitoring task, record the [dispatch instruction] of the power outage operation ticket and the [substation] and [main transformer] in the monitoring task. Determine whether the application form has been registered in the PMS. If it has been registered, do not register it again; otherwise, automatically register a key monitoring record in the PMS. The system enters the PMS database, records the registration time as the current time, and records the content as: During the [dispatch instruction] period, monitor the [substation] and [main transformer] to ensure they are not overloaded.

[0060] 5. Locate the load rate η of the [main transformer] corresponding to the [substation] in the cloud platform database, display it in system area one, and show the real-time curve of the load rate η. The system automatically obtains the load rate threshold η corresponding to this main transformer. thr Meanwhile, the threshold η thr Users can adjust this themselves; when the load rate η exceeds the threshold η thr The system will alert users in area one and also send alarms through external devices. Alarm methods include, but are not limited to: 1. issuing an audible or visual alarm; 2. contacting the dispatcher and maintenance personnel responsible for the substation, informing them that the substation's main transformer load rate has exceeded the load rate threshold. When the load rate is below the threshold η... thr The system will cancel alarms, including: 1. Canceling the alarm sound or audible / visual alarm; 2. Contacting the dispatcher and the maintenance personnel responsible for the substation, informing them that the load rate of the substation's main transformer has fallen below the load rate threshold η. thr ;

[0061] 6. Check whether the dispatcher has issued a risk warning and ended the power supply operation ticket in the application form. If so, complete the PMS record to achieve automatic closed-loop control of the record. If the dispatcher has not issued a risk warning and ended the power supply operation ticket, continue to step 5.

[0062] 7. If the user terminates the program, the system exits; otherwise, proceed to step 3.

[0063] Active monitoring refers to the system allowing users to add key monitoring tasks. Each substation's telemetry data has a unique identifier number. Monitoring targets can be filtered by combining the substation name and the identifier number. Users can also modify the thresholds for monitoring targets, enabling monitoring under different limits. A detailed workflow diagram is shown below. Figure 4 As shown, the specific workflow is as follows:

[0064] 1. Actively monitor module initialization. During initialization, access to the cloud platform's database is required. To prevent modification of the cloud platform's database content and data corruption, the authorized access permissions need to be set to read-only to prohibit operations on the cloud platform's database.

[0065] 2. Users can add key monitoring tasks, filter and add monitoring objects by combination of substation name and point number, obtain data of the monitoring objects in real time, and draw real-time curves;

[0066] 3. Set the initial threshold for the monitored objects;

[0067] 4. Determine whether the data of the monitored task exceeds the threshold. If so, issue an alarm; otherwise, do not issue an alarm.

[0068] 5. If the user chooses to end the key monitoring task, the monitored objects will be cleared and the monitoring task will end; otherwise, proceed to step 5.

[0069] 6. Determine whether the user has modified the monitoring threshold of the monitored object. If the threshold has been modified, check whether the monitored data exceeds the new threshold. If the threshold has not been modified, check whether the monitored data exceeds the threshold before modification.

[0070] Full-station monitoring refers to the ability of this power grid intelligent monitoring system to focus on monitoring abnormal signals at the substation level. When maintenance personnel are on-site for rotation, testing, or other work, they will inform the monitor of the work items to be carried out. The monitor can then select the substation and the required items within the system. The system immediately collects abnormal signals from each substation and uploads them to the cloud platform, displaying them on the system interface for easy signal verification after the work is completed. Furthermore, this power grid intelligent monitoring system can establish a signal alarm database for each work item. During on-site work, if a signal collected by the system is in the alarm database, the system will alert the monitor. A detailed workflow diagram is shown below. Figure 5 As shown:

[0071] 1. The whole site monitor performs module initialization. During the initialization period, it needs to access the cloud platform database. To prevent the cloud platform database from being modified and causing data corruption, the authorized access permissions need to be set to read-only permissions to prohibit operations on the cloud platform database.

[0072] 2. Users can add substations as key monitoring targets;

[0073] 3. Collect and display signals uploaded to the cloud platform during monitoring, and compile statistics on the time and status information of actions;

[0074] 4. Determine if the signal exists in the signal alarm database. If the signal exists in the signal alarm database, an alarm will be triggered to the monitoring personnel. If the signal does not exist in the signal alarm database, no alarm will be triggered, and step 3 will be executed to continue collecting and displaying signals.

[0075] 5. After the on-site reporting work is completed and the operation and maintenance personnel and the monitoring personnel have verified that the signals are correct, the monitoring personnel can choose to end the key monitoring and stop monitoring.

[0076] Figure 6 The diagram shown is a schematic of the system interface of the present invention. The system interface is divided into three areas, which correspond to automatic monitoring, active monitoring and full-site monitoring, respectively.

[0077] Both automatic and active monitoring areas include the substation name, main transformer number, real-time load rate, and load rate threshold. Users can click or right-click on the real-time load rate data to view the load curve graph, such as... Figure 7 As shown. The load curve includes, but is not limited to, today's load rate curve, yesterday's load rate curve, and the load rate threshold line. You can click on yesterday's load rate curve to view the load rate for a specific date, and view the maximum load rate, the time of maximum load rate, and the maximum current for today. When the real-time load rate exceeds the load rate threshold, the background color of both the automatic and active monitoring areas turns red as a warning, and the main transformer exceeding the load rate threshold will flash, as shown. Figure 8 As shown. Due to work requirements, the automatic monitoring system will also automatically register a record for key monitoring in the PMS.

[0078] The full-station monitoring area includes: substation name, on-site work content, work start time, sequence number, item name, time, action / reset, and other information. The substation name can be searched using the first letter of the substation name. On-site work content can be selected by the user from a drop-down list or by entering the work content for a fuzzy search. Multiple work contents can be selected simultaneously for easy observation of whether the signals transmitted from the field are normal. The work start time is the recorded start time, the sequence number is the number of transmitted signals (incrementing sequentially), the item name is the name of the signal transmitted by the substation, and the time is the action / reset time for the item name. Action / reset refers to the status indicator of the item name. When an item name has both an action time and a reset time, the time will be displayed in the format of "Action Time → Reset Time," and the action / reset status indicator will be displayed in the format of "Action → Reset." Right-clicking "Full-Station Monitoring" displays a drop-down menu, which includes: adding, displaying the names of substations currently under full-station monitoring, and alarm database settings. Figure 9 As shown. The new feature allows adding full-site monitoring stations, enabling simultaneous signal monitoring of multiple substations. Clicking the substation name in the drop-down menu switches between monitoring views of different substations. Right-clicking the substation name allows switching to that substation's monitoring interface or ending the monitoring task for that substation. The alarm library settings allow adding or deleting signals according to work needs, such as... Figure 10 As shown, in the work content area at the bottom of the interface, you can add alarm libraries for different work content using the "+" button. In the middle area of ​​the interface, you can set the event name, action type, and trigger event. The event name refers to the name of the signal sent by the substation. You can use the "Ctrl+F" key combination to perform a fuzzy search for the signal and add it to the event name column, or you can use the "Ctrl+Shift+F" key combination to enter the unique identifier code "point number" of the signal to search for the signal and add it to the event name column. The action type refers to the state change of the signal, including: the action state changes to the reset state, and the reset state changes to the action state. The trigger event refers to the event that results in a penalty when the signal undergoes a state change in the action type, including: alarm and no alarm.

[0079] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0080] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0081] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0082] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0083] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0084] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0085] This patent is not limited to the above-described preferred embodiment. Anyone can derive other forms of intelligent monitoring system for power grid information based on the inspiration of this patent. All equivalent changes and modifications made within the scope of this patent application shall fall within the scope of this patent.

Claims

1. A smart monitoring system for power grid information, characterized in that: include: Monitoring module, active monitoring module, and full-site monitoring module; The monitoring module is used to read the key monitoring tasks published in the scheduling cloud platform in real time. Once a key monitoring task is detected, it will be carried out and the corresponding record will be registered in the PMS. When the scheduling ends and risk control is completed, the key monitoring task will be terminated and the record in the PMS will be completed, forming a closed-loop management. The active monitoring module allows users to add key monitoring tasks independently; it uses the unique identifier point number of telemetry data from each substation to filter monitoring objects, and supports users to modify the threshold of the monitoring objects to monitor the objects under different limits. The full-station monitoring module focuses on monitoring abnormal signals at the substation level, allowing the collection and display of abnormal signals sent to the cloud platform from the corresponding substations. It also allows the establishment of a signal alarm database corresponding to the work content for verification with signals collected during on-site work. When a signal generated during on-site work is found to exist in the signal alarm database, an active warning is issued. The workflow of the monitoring module includes: (1) Initialize the cloud platform database and set the access permission to read-only, prohibiting the operation of the cloud platform database; set the access permission to the PMS database to read-write permission, which is used to register key monitoring records. (2) Access the control cloud platform database and read the application form; (3) Check each power outage operation ticket on the application form to see if the monitoring team needs to monitor the transformer to prevent overload, and determine whether the key monitoring task should be carried out; (4) When there is a need to perform key monitoring tasks, record the dispatch instructions of the power outage operation ticket and the substation and main transformer in the monitoring task. Determine whether the application form has been registered in the PMS. If it has been registered, do not register the record again. Otherwise, register a key monitoring record in the PMS. Enter the PMS database and record the registration time as the current time. Record the content as: During the dispatch instruction period, the main transformer of the monitored substation will not be overloaded. (5) Locate the load rate η of the main transformer corresponding to the substation in the cloud platform database, display it, and show the real-time curve of the load rate η; obtain the adjustable load rate threshold η corresponding to the main transformer. thr When the load rate η exceeds the threshold η thr An alarm will be generated when the load rate is below the threshold η. thr If so, then cancel the alarm; (6) Check whether the risk warning has been issued in the power supply operation ticket of the application form. If so, complete the PMS record to achieve closed-loop record control. If the risk warning has not been issued, return to step 5. (7) If you choose to stop execution, exit; otherwise, return to step 3.

2. The intelligent monitoring system for power grid information according to claim 1, characterized in that: Connect to a cloud platform, external devices, and a production management system (PMS); the external devices include at least alarm devices and a direct dialing telephone system; use the PMS to register key monitoring records for future reference.

3. The intelligent monitoring system for power grid information according to claim 1, characterized in that: The workflow of the active monitoring module includes: (1) Initialize the cloud platform database and set the access permission to read-only, prohibiting any operation on the cloud platform database; (2) Add key monitoring tasks, acquire data of the monitored objects in real time, and draw real-time curves; (3) Set the initial threshold for the monitored objects; (4) Determine whether the data of the monitored task exceeds the threshold. If so, issue an alarm; otherwise, do not issue an alarm. (5) If you choose to end the key monitoring task, the monitored objects will be cleared and the monitoring task will end; otherwise, proceed to step 5. (6) Determine whether the monitoring threshold of the monitored object has been modified. If the threshold has been modified, check whether the monitoring data exceeds the new threshold. If the threshold has not been modified, return to step 4 to check whether the monitoring data exceeds the threshold before modification.

4. The intelligent monitoring system for power grid information according to claim 1, characterized in that: The specific workflow of the full-site monitoring module includes: (1) Initialize the cloud platform database and set the access permission to read-only, prohibiting any operation on the cloud platform database; (2) Add substations as key monitoring targets; (3) Collect and display the signals sent to the cloud platform during the monitoring period, and compile statistics including the time and status information of the actions; (4) Determine whether the signal obtained in step 3 exists in the signal alarm database. If it exists, an alarm will be triggered. If it does not exist in the signal alarm database, no alarm will be triggered, and the process will return to step 3 to continue collecting and displaying signals. (5) After the on-site work is completed and the operation and maintenance personnel have verified that the signals are correct, the key monitoring is terminated.

5. The intelligent monitoring system for power grid information according to claim 1, characterized in that: The outputs of the monitoring module, active monitoring module, and full-site monitoring module are displayed in three different areas. The monitoring module and the active monitoring module display at least the following: substation name, main transformer number, real-time load rate, load rate threshold, and load curve graph of load rate data retrieval; and calculate the maximum load rate, the time of maximum load rate, and the maximum current; when the real-time load rate exceeds the load rate threshold, an alarm is triggered, and a record of key monitoring is registered in the PMS.

6. The intelligent monitoring system for power grid information according to claim 1, characterized in that: The display of the full-station monitoring module includes at least: substation name, on-site work content, work start time, sequence number, item name, time, and action / reset information.

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