Substation electromechanical equipment safety protection early warning method based on electronic virtual fence

Abstract

The invention relates to the technical field of substation electromechanical equipment safety protection, in particular to a substation electromechanical equipment safety protection early warning method based on an electronic virtual fence, and the method comprises the steps: carrying out the monitoring of an electronic virtual fence region through a camera, and carrying out the intrusion feature extraction of a monitoring image; and generating risk assessment information of the corresponding electronic virtual fence area in combination with the extracted intrusion features and historical monitoring information of the corresponding electronic virtual fence area. According to the invention, dynamic regulation and control can be carried out on the electronic virtual fence area of the electromechanical equipment of the transformer substation and the monitoring sensitivity regulation and control coefficient corresponding to each actual construction area in the corresponding electronic virtual fence area through the monitored personnel intrusion behavior; therefore, fine monitoring of the electronic virtual fence area of the electromechanical equipment of the transformer substation is realized according to the personnel intrusion behavior, the electronic virtual fence area invaded by personnel can be quickly locked, and effective management and control of security and protection of the electromechanical equipment of the transformer substation are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of safety protection of electromechanical equipment in substations, and in particular to a safety protection early warning method for electromechanical equipment in substations based on electronic virtual fences. Background Art

[0002] As a core component of the power system, the operational safety of substations is an important foundation for ensuring the safe and stable operation of the power system. To ensure the operational safety of substations, a series of safety protection measures need to be taken, among which electronic virtual fence technology is an important means. Substation electronic virtual fence is an application of modern safety protection technology. It aims to set up a virtual protection zone around power facilities (especially substations) through technical means for real-time monitoring and preventing unauthorized personnel from entering specific areas.

[0003] The existing substation electromechanical equipment safety protection early warning system based on electronic virtual fence often uses sensors to issue early warnings on whether there is human intrusion within the electronic virtual fence. It is unable to dynamically adjust the monitoring sensitivity control coefficients corresponding to the electronic virtual fence area of the substation electromechanical equipment and the actual construction areas in the corresponding electronic virtual fence area based on the detected human intrusion behavior, and thus cannot achieve refined monitoring and early warning of the electronic virtual fence area of the substation electromechanical equipment based on human intrusion behavior. Therefore, the existing technology has major defects. Summary of the Invention

[0004] The purpose of the present invention is to provide a safety protection early warning method for electromechanical equipment in a substation based on an electronic virtual fence, so as to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solution: a safety protection early warning method for electromechanical equipment in a substation based on an electronic virtual fence, the method comprising the following steps:

[0006] S1. Constructing a substation construction area model based on the distribution locations of the substation's electromechanical equipment and the actual construction area, and generating an electronic virtual fence area in the substation construction area model based on the traffic paths within a preset radius around the distribution locations of the substation's electromechanical equipment; the electronic virtual fence area includes one or more actual construction areas;

[0007] S2. Monitoring the electronic virtual fence area through a camera and extracting intrusion features from the monitoring image; combining the extracted intrusion features with historical monitoring information of the corresponding electronic virtual fence area to generate risk assessment information for the corresponding electronic virtual fence area;

[0008] S3. Based on the generated risk assessment information of the electronic virtual fence area, calculate the monitoring sensitivity control coefficient corresponding to each actual construction area in the corresponding electronic virtual fence area, generate monitoring status warning information of the corresponding electronic virtual fence, and feedback it to the security administrator;

[0009] S4. Based on the monitoring sensitivity control coefficients corresponding to the actual construction areas in the electronic virtual fence area, the electronic virtual fence area and its control level in the substation construction area model are updated and adjusted, and stored in the database;

[0010] S5. According to the generated early warning information of the monitoring status of the electronic virtual fence, the display position of the monitoring screen in each actual construction area on the display terminal of the early warning linkage device is adjusted.

[0011] Furthermore, the substation construction area model includes each actual construction area to which the substation electromechanical equipment belongs and the distribution location of the substation electromechanical equipment in each actual construction area; the substation construction area model is constructed by using the distribution location of the substation electromechanical equipment and satellite remote sensing images of the actual construction area;

[0012] In the process of generating the electronic virtual fence area in the substation construction area model, the access paths and building distribution locations in the actual construction area to which the substation electromechanical equipment distribution location belongs are obtained, and any combination of each access path and each building distribution location within a preset radius around each substation electromechanical equipment distribution location is obtained to generate different combination schemes. Among the combination schemes that can enclose a closed area by connecting the position areas of corresponding combination elements, the combination scheme with the smallest closed area that contains the corresponding substation electromechanical equipment distribution location within the enclosed closed area is recorded as the optimal monitoring scheme for the substation electromechanical equipment distribution location;

[0013] If the optimal monitoring scheme for the electromechanical equipment distribution location of the substation does not exist in the combination scheme formed by any combination of each access path and each building distribution location within a preset radius around the electromechanical equipment distribution location of the substation, then the electromechanical equipment distribution location of the substation that is closest to the corresponding electromechanical equipment distribution location of the substation is obtained and recorded as the collaborative monitoring location; the combination scheme formed by any combination of each access path and each building distribution location within a preset radius around the corresponding electromechanical equipment distribution location of the substation and the corresponding collaborative monitoring location is obtained; among the combination schemes that can enclose a closed area by connecting the position areas of the corresponding combination elements, the combination scheme with the smallest closed area area containing the corresponding electromechanical equipment distribution location of the substation is recorded as the optimal monitoring scheme for the electromechanical equipment distribution location of the substation;

[0014] The closed area enclosed by the location areas of each combination element in the optimal monitoring scheme for the distribution location of the substation electromechanical equipment, which includes the distribution location of the corresponding substation electromechanical equipment, is used as the electronic virtual fence area of the corresponding substation electromechanical equipment in the substation construction area model.

[0015] In the present invention, the generation of the electronic virtual fence area of each substation electromechanical equipment is dynamic, which is determined based on the various traffic paths and building distribution locations within a preset radius around the distribution location of the substation electromechanical equipment, and the size of the preset radius directly affects the size of the generated electronic virtual fence area.

[0016] Furthermore, the intrusion feature extraction result of the monitoring screen in S2 includes the facial feature recognition result of each intruder, the intrusion trajectory of each time, and the behavioral feature recognition result of each intrusion trajectory;

[0017] The intrusion trajectory behavior feature recognition result represents a set consisting of the deviation rate between the intrusion trajectory and the shortest path from the intrusion starting point to the nearest substation electromechanical equipment, the intrusion trajectory return rate, and the behavior pattern deviation coefficient;

[0018] The deviation rate between the intrusion trajectory and the shortest path from the intrusion starting point to the nearest substation electromechanical equipment is equal to 1 minus the length of the overlapping section between the intrusion trajectory and the shortest path from the intrusion starting point to the nearest substation electromechanical equipment divided by the total length of the intrusion trajectory;

[0019] The intrusion trajectory reentry rate is equal to the ratio of the intrusion distance with reentry behavior in the intrusion trajectory to the total length of the intrusion trajectory;

[0020] The behavior pattern deviation coefficient is equal to the ratio of the frequency of abnormal activities of the user behavior pattern deviation during the intrusion process divided by the total length of the intrusion trajectory. The abnormal activities of the user behavior pattern deviation represent the deviation behavior of the intrusion trajectory compared to the shortest path from the intrusion starting point to the nearest substation electromechanical equipment, as well as the deviation behavior from the regression shortest path behavior at each decision point after the trajectory deviation. The decision points include intersections passed through and locations where the stay exceeds a preset time.

[0021] When extracting features from monitoring images, the present invention comprehensively considers three aspects: the facial feature recognition results of the intruder (intruder recognition), the intrusion trajectory of each time (intrusion trajectory recognition), and the behavioral feature recognition results of each intrusion trajectory (intrusion behavior feature recognition), so as to obtain the intrusion information in the monitoring images and provide data support for the subsequent generation of risk assessment information of the corresponding electronic virtual fence area.

[0022] Furthermore, the risk assessment information of the corresponding electronic virtual fence area generated in S2 includes the electronic virtual fence area risk assessment value of each substation electromechanical equipment in the substation construction area model;

[0023] The calculation formula for the risk assessment value of the electronic virtual fence area of each substation electromechanical equipment in the substation construction area model is as follows:

[0024] RA n =max{RA (n,t) |t∈[TD-TZ,TD]}

[0025]

[0026] Among them, RA n Represents the risk assessment value of the electronic virtual fence area of the nth substation electromechanical equipment in the substation construction area model; RA (n,t) It represents the risk assessment value of the electronic virtual fence area of the electromechanical equipment of the nth substation in the substation construction area model from the start time of the most recent intrusion before time point t in the latest time period TZ based on the current time TD to time point t; the intrusion trajectory from the start time of the most recent intrusion before time point t in the latest time period TZ based on the current time TD to time point t is a continuous and uninterrupted path; if there is no intrusion behavior in the time period from time point TD-TZ to time point t, then RA is determined (n,t) =0;E (n,t) It represents the comparison coefficient between the facial feature recognition result of the intruder corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation and the facial features of the preset personnel in the database from the start time of the most recent intrusion before the time point t in the most recent time period TZ based on the current time TD to the time point t; if the facial features of the preset personnel in the database have a similarity greater than or equal to the preset similarity with the facial feature recognition result of the intruder, then it is determined that E (n,t) =0; otherwise, it is determined that E (n,t) =1;P (n,t) R represents the deviation rate between the intrusion trajectory in the intrusion trajectory behavior feature recognition result corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation and the shortest path from the intrusion starting point to the nearest electromechanical equipment of the substation from the start time of the most recent intrusion to the time point t in the most recent time period TZ based on the current time TD; (n,t) It represents the intrusion trajectory return rate in the intrusion trajectory behavior feature recognition result corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation from the start time of the most recent intrusion before time point t to time point t in the latest time period TZ based on the current time TD; BP (n,t)represents the behavioral pattern deviation coefficient in the intrusion trajectory behavior feature recognition results corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation from the start time of the most recent intrusion before time point t within the most recent time period TZ based on the current time TD to time point t; μ represents the preset weighting coefficient; e represents a natural constant; max{} represents the maximum value operation.

[0027] Furthermore, the S3 specifically includes:

[0028] The formula for calculating the monitoring sensitivity control coefficient corresponding to each actual construction area in the corresponding electronic virtual fence area is as follows:

[0029] SC m =max{RA (n，m，k) |k∈[1,QTY (n，m) ]}·SCZQ / SCZ

[0030] Among them, SC m Indicates the monitoring sensitivity control coefficient corresponding to the mth actual construction area in the electronic virtual fence area; QTY (n，m) Indicates the number of electromechanical equipment in the substation that intersects the corresponding electronic virtual fence area and the mth actual construction area in the nth electronic virtual fence area; RA (n，m，k) Represents the risk assessment value of the electronic virtual fence area of the kth substation electromechanical equipment where the corresponding electronic virtual fence area intersects with the mth actual construction area in the nth electronic virtual fence area; SCZ represents the sum of the monitoring sensitivity control coefficients of the actual construction area to which each substation electromechanical equipment belongs predicted at the current time; the monitoring sensitivity control coefficient of the actual construction area to which the substation electromechanical equipment belongs predicted at the current time is equal to the maximum value of the risk assessment values of each electronic virtual fence area whose intersection area is the actual construction area to which the corresponding substation electromechanical equipment belongs; SCZQ represents the sum of the monitoring sensitivity control coefficients of the actual construction area to which each substation electromechanical equipment belongs stored in the database at the current time;

[0031] The monitoring status warning information of the corresponding electronic virtual fence includes a set of monitoring sensitivity control coefficients of the actual construction area to which each substation electromechanical equipment belongs at the current time, and a set of substation electromechanical equipment whose risk assessment value in the electronic virtual fence area is not 0.

[0032] Furthermore, when the electronic virtual fence area in the substation construction area model is updated and adjusted in S4, the preset radius corresponding to the nth substation electromechanical equipment when the electronic virtual fence area is constructed stored in the current time database is obtained, which is recorded as L n ; The monitoring sensitivity control coefficient of the actual construction area of the electromechanical equipment of the nth substation predicted at the current time is recorded as SCYn ; The monitoring sensitivity control coefficient of the actual construction area of the nth substation electromechanical equipment stored in the current time database is recorded as SCB n ; Update the preset radius corresponding to the electromechanical equipment of the nth substation when building the electronic virtual fence area stored in the current time database, and record the corresponding update result as LG n ,

[0033] LG n =L n ·SCY n / SCB n

[0034] The electronic virtual fence area in the updated and adjusted nth substation construction area model is the updated result LG of the preset radius corresponding to the nth substation electromechanical equipment stored in the current time database. n Reconstructed electronic virtual fence area.

[0035] Furthermore, when the control level of the electronic virtual fence area in the substation construction area model is updated and adjusted in S4, the control priority of the electronic virtual fence area in the substation construction area model is equal to the serial number of the corresponding electronic virtual fence area in the first control sequence; the first control sequence is the result of sorting the electronic virtual fence areas in descending order according to the average value of the monitoring sensitivity control coefficient corresponding to each actual construction area in the corresponding electronic virtual fence area obtained most recently, and the positions of the electronic virtual fence areas with equal average values of the monitoring sensitivity control coefficients corresponding to the actual construction areas in the first control sequence are randomly arranged;

[0036] In the process of storing the updated adjustment results of the electronic virtual fence area and its prevention and control level in the substation construction area model in the database, the updated result of the preset radius corresponding to the nth substation electromechanical equipment when constructing the electronic virtual fence area stored in the database at the current time replaces the original data in the database; the updated adjustment results of the electronic virtual fence area and its prevention and control level in the substation construction area model replace the original data in the database.

[0037] Furthermore, the S5 includes:

[0038] According to the control level of the electronic virtual fence area in the substation construction area model from high to low, the monitoring images of each actual construction area contained in the electronic virtual fence area corresponding to each substation electromechanical equipment whose risk assessment value of the electronic virtual fence area is not 0 are presented in turn on the display terminal screen of the early warning linkage device.

[0039] Compared with the existing technology, the beneficial effect achieved by the present invention is: the present invention can dynamically adjust the monitoring sensitivity control coefficients corresponding to the electronic virtual fence area of the substation electromechanical equipment and each actual construction area in the corresponding electronic virtual fence area through the monitored human intrusion behavior, and then realize the refined monitoring of the electronic virtual fence area of the substation electromechanical equipment according to the human intrusion behavior, ensuring that the electronic virtual fence area where the human intrusion is located can be quickly locked, and the security of the substation electromechanical equipment can be effectively controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0041] Figure 1 It is a flow chart of the safety protection early warning method for electromechanical equipment in a substation based on an electronic virtual fence according to the present invention. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] See also Figure 1 The present invention provides a technical solution: a safety protection and early warning method for electromechanical equipment in a substation based on an electronic virtual fence, the method comprising the following steps:

[0044] S1. Constructing a substation construction area model based on the distribution locations of the substation's electromechanical equipment and the actual construction area, and generating an electronic virtual fence area in the substation construction area model based on the traffic paths within a preset radius around the distribution locations of the substation's electromechanical equipment; the electronic virtual fence area includes one or more actual construction areas;

[0045] The substation construction area model includes the actual construction areas to which the substation electromechanical equipment belongs and the distribution locations of the substation electromechanical equipment in each actual construction area; the substation construction area model is constructed by using the distribution locations of the substation electromechanical equipment and satellite remote sensing images of the actual construction area;

[0046] In the process of generating the electronic virtual fence area in the substation construction area model, the access paths and building distribution locations in the actual construction area to which the substation electromechanical equipment distribution location belongs are obtained, and any combination of each access path and each building distribution location within a preset radius around each substation electromechanical equipment distribution location is obtained to generate different combination schemes. Among the combination schemes that can enclose a closed area by connecting the position areas of corresponding combination elements, the combination scheme with the smallest closed area that contains the corresponding substation electromechanical equipment distribution location within the enclosed closed area is recorded as the optimal monitoring scheme for the substation electromechanical equipment distribution location;

[0047] If the optimal monitoring scheme for the electromechanical equipment distribution location of the substation does not exist in the combination scheme formed by any combination of each access path and each building distribution location within a preset radius around the electromechanical equipment distribution location of the substation, then the electromechanical equipment distribution location of the substation that is closest to the corresponding electromechanical equipment distribution location of the substation is obtained and recorded as the collaborative monitoring location; the combination scheme formed by any combination of each access path and each building distribution location within a preset radius around the corresponding electromechanical equipment distribution location of the substation and the corresponding collaborative monitoring location is obtained; among the combination schemes that can enclose a closed area by connecting the position areas of the corresponding combination elements, the combination scheme with the smallest closed area area containing the corresponding electromechanical equipment distribution location of the substation is recorded as the optimal monitoring scheme for the electromechanical equipment distribution location of the substation;

[0048] The closed area enclosed by the location areas of each combination element in the optimal monitoring scheme for the distribution location of the substation electromechanical equipment, which includes the distribution location of the corresponding substation electromechanical equipment, is used as the electronic virtual fence area of the corresponding substation electromechanical equipment in the substation construction area model.

[0049] S2. Monitoring the electronic virtual fence area through a camera and extracting intrusion features from the monitoring image; combining the extracted intrusion features with historical monitoring information of the corresponding electronic virtual fence area to generate risk assessment information for the corresponding electronic virtual fence area;

[0050] The intrusion feature extraction results of the monitoring screen in S2 include the facial feature recognition results of each intruder, each intrusion trajectory and the behavioral feature recognition results of each intrusion trajectory;

[0051] The intrusion trajectory behavior feature recognition result represents a set consisting of the deviation rate between the intrusion trajectory and the shortest path from the intrusion starting point to the nearest substation electromechanical equipment, the intrusion trajectory return rate, and the behavior pattern deviation coefficient;

[0052] The deviation rate between the intrusion trajectory and the shortest path from the intrusion starting point to the nearest substation electromechanical equipment is equal to 1 minus the length of the overlapping section between the intrusion trajectory and the shortest path from the intrusion starting point to the nearest substation electromechanical equipment divided by the total length of the intrusion trajectory;

[0053] The intrusion trajectory reentry rate is equal to the ratio of the intrusion distance with reentry behavior in the intrusion trajectory to the total length of the intrusion trajectory;

[0054] The behavior pattern deviation coefficient is equal to the ratio of the frequency of abnormal activities of the user behavior pattern deviation during the intrusion process divided by the total length of the intrusion trajectory. The abnormal activities of the user behavior pattern deviation represent the deviation behavior of the intrusion trajectory compared to the shortest path from the intrusion starting point to the nearest substation electromechanical equipment, as well as the deviation behavior from the regression shortest path behavior at each decision point after the trajectory deviation. The decision points include intersections passed through and locations where the stay exceeds a preset time.

[0055] The risk assessment information of the corresponding electronic virtual fence area generated in S2 includes the electronic virtual fence area risk assessment value of each substation electromechanical equipment in the substation construction area model;

[0056] The calculation formula for the risk assessment value of the electronic virtual fence area of each substation electromechanical equipment in the substation construction area model is as follows:

[0057] RA n =max{RA (n,t) |t∈[TD-TZ,TD]}

[0058]

[0059] Among them, RA n Represents the risk assessment value of the electronic virtual fence area of the nth substation electromechanical equipment in the substation construction area model; RA (n,t) It represents the risk assessment value of the electronic virtual fence area of the electromechanical equipment of the nth substation in the substation construction area model from the start time of the most recent intrusion before time point t in the latest time period TZ based on the current time TD to time point t; the intrusion trajectory from the start time of the most recent intrusion before time point t in the latest time period TZ based on the current time TD to time point t is a continuous and uninterrupted path; if there is no intrusion behavior in the time period from time point TD-TZ to time point t, then RA is determined (n,t) =0;E (n,t)It represents the comparison coefficient between the facial feature recognition result of the intruder corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation and the facial features of the preset personnel in the database from the start time of the most recent intrusion before the time point t in the most recent time period TZ based on the current time TD to the time point t; if the facial features of the preset personnel in the database have a similarity greater than or equal to the preset similarity with the facial feature recognition result of the intruder, then it is determined that E (n,t) =0; otherwise, it is determined that E (n,t) =1;P (n,t) R represents the deviation rate between the intrusion trajectory in the intrusion trajectory behavior feature recognition result corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation and the shortest path from the intrusion starting point to the nearest electromechanical equipment of the substation from the start time of the most recent intrusion to the time point t in the most recent time period TZ based on the current time TD; (n,t) It represents the intrusion trajectory return rate in the intrusion trajectory behavior feature recognition result corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation from the start time of the most recent intrusion before time point t to time point t in the latest time period TZ based on the current time TD; BP (n,t) represents the behavioral pattern deviation coefficient in the intrusion trajectory behavior feature recognition results corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation from the start time of the most recent intrusion before time point t within the most recent time period TZ based on the current time TD to time point t; μ represents the preset weighting coefficient; e represents a natural constant; max{} represents the maximum value operation.

[0060] S3. Based on the generated risk assessment information of the electronic virtual fence area, calculate the monitoring sensitivity control coefficient corresponding to each actual construction area in the corresponding electronic virtual fence area, generate monitoring status warning information of the corresponding electronic virtual fence, and feedback it to the security administrator;

[0061] The S3 specifically includes:

[0062] The formula for calculating the monitoring sensitivity control coefficient corresponding to each actual construction area in the corresponding electronic virtual fence area is as follows:

[0063] SC m =max{RA (n，m，k) |k∈[1,QTY (n，m) ]}·SCZQ / SCZ

[0064] Among them, SC m Indicates the monitoring sensitivity control coefficient corresponding to the mth actual construction area in the electronic virtual fence area; QTY (n，m)Indicates the number of electromechanical equipment in the substation that intersects the corresponding electronic virtual fence area and the mth actual construction area in the nth electronic virtual fence area; RA (n，m，k) Represents the risk assessment value of the electronic virtual fence area of the kth substation electromechanical equipment where the corresponding electronic virtual fence area intersects with the mth actual construction area in the nth electronic virtual fence area; SCZ represents the sum of the monitoring sensitivity control coefficients of the actual construction area to which each substation electromechanical equipment belongs predicted at the current time; the monitoring sensitivity control coefficient of the actual construction area to which the substation electromechanical equipment belongs predicted at the current time is equal to the maximum value of the risk assessment values of each electronic virtual fence area whose intersection area is the actual construction area to which the corresponding substation electromechanical equipment belongs; SCZQ represents the sum of the monitoring sensitivity control coefficients of the actual construction area to which each substation electromechanical equipment belongs stored in the database at the current time;

[0065] The monitoring status warning information of the corresponding electronic virtual fence includes a set of monitoring sensitivity control coefficients of the actual construction area to which each substation electromechanical equipment belongs at the current time, and a set of substation electromechanical equipment whose risk assessment value in the electronic virtual fence area is not 0.

[0066] In this embodiment, according to the differences between the monitoring sensitivity control coefficients corresponding to the actual construction areas in the electronic virtual fence area, the acquisition frequency of the monitoring images of the actual construction areas in the electronic virtual fence area can also be adjusted. For the actual construction areas with large monitoring sensitivity control coefficients, the acquisition frequency of the monitoring images of the corresponding actual construction areas can be increased to ensure the timeliness of the acquisition of information on intrusion behavior; conversely, for the actual construction areas with large monitoring sensitivity control coefficients, the acquisition frequency of the monitoring images of the corresponding actual construction areas can be appropriately reduced, the amount of analysis data for the monitoring images can be reduced, the data processing speed can be accelerated, and it can be ensured that the monitoring images with intrusion behavior can be screened out in time.

[0067] S4. Based on the monitoring sensitivity control coefficients corresponding to the actual construction areas in the electronic virtual fence area, the electronic virtual fence area and its control level in the substation construction area model are updated and adjusted, and stored in the database;

[0068] When the electronic virtual fence area in the substation construction area model is updated and adjusted in S4, the preset radius corresponding to the nth substation electromechanical equipment when the electronic virtual fence area is constructed stored in the current time database is obtained, which is recorded as L n ; The monitoring sensitivity control coefficient of the actual construction area of the electromechanical equipment of the nth substation predicted at the current time is recorded as SCY n ; The monitoring sensitivity control coefficient of the actual construction area of the nth substation electromechanical equipment stored in the current time database is recorded as SCBn ; Update the preset radius corresponding to the electromechanical equipment of the nth substation when building the electronic virtual fence area stored in the current time database, and record the corresponding update result as LG n ,

[0069] LG n =L n ·SCY n / SCB n

[0070] The electronic virtual fence area in the updated and adjusted nth substation construction area model is the updated result LG of the preset radius corresponding to the nth substation electromechanical equipment stored in the current time database. n Reconstructed electronic virtual fence area.

[0071] In this embodiment, changes in the electronic virtual fence area of each substation electromechanical equipment in the substation construction area model will cause changes in the number of cameras called in the corresponding monitoring area (each camera corresponds to a preset monitoring installation position) and the monitoring angle of each called camera.

[0072] When updating and adjusting the control level of the electronic virtual fence area in the substation construction area model in S4, the control priority of the electronic virtual fence area in the substation construction area model is equal to the sequence number of the corresponding electronic virtual fence area in the first control sequence; the first control sequence is the result of sorting the electronic virtual fence areas in descending order according to the most recently obtained average values of the monitoring sensitivity control coefficients corresponding to the actual construction areas in the corresponding electronic virtual fence areas, and the positions of the electronic virtual fence areas in the first control sequence that have the same average values of the monitoring sensitivity control coefficients corresponding to the actual construction areas are randomly arranged;

[0073] In the process of storing the updated adjustment results of the electronic virtual fence area and its prevention and control level in the substation construction area model in the database, the updated result of the preset radius corresponding to the nth substation electromechanical equipment when constructing the electronic virtual fence area stored in the database at the current time replaces the original data in the database; the updated adjustment results of the electronic virtual fence area and its prevention and control level in the substation construction area model replace the original data in the database.

[0074] S5. According to the generated early warning information of the monitoring status of the electronic virtual fence, the display position of the monitoring screen in each actual construction area on the display terminal of the early warning linkage device is adjusted.

[0075] The S5 includes:

[0076] According to the control level of the electronic virtual fence area in the substation construction area model from high to low, the monitoring images of each actual construction area contained in the electronic virtual fence area corresponding to each substation electromechanical equipment whose risk assessment value of the electronic virtual fence area is not 0 are presented in turn on the display terminal screen of the early warning linkage device.

[0077] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0078] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A safety protection and early warning method for electromechanical equipment in a substation based on an electronic virtual fence, characterized in that: The method comprises the following steps: S1. Constructing a substation construction area model based on the distribution locations of the substation's electromechanical equipment and the actual construction area, and generating an electronic virtual fence area in the substation construction area model based on the traffic paths within a preset radius around the distribution locations of the substation's electromechanical equipment; the electronic virtual fence area includes one or more actual construction areas; S2. Monitoring the electronic virtual fence area through a camera and extracting intrusion features from the monitoring image; combining the extracted intrusion features with historical monitoring information of the corresponding electronic virtual fence area to generate risk assessment information for the corresponding electronic virtual fence area; S3. Based on the generated risk assessment information of the electronic virtual fence area, calculate the monitoring sensitivity control coefficient corresponding to each actual construction area in the corresponding electronic virtual fence area, generate monitoring status warning information of the corresponding electronic virtual fence, and feedback it to the security administrator; S4. Based on the monitoring sensitivity control coefficients corresponding to the actual construction areas in the electronic virtual fence area, the electronic virtual fence area and its control level in the substation construction area model are updated and adjusted, and stored in the database; S5. According to the generated early warning information of the monitoring status of the electronic virtual fence, the display position of the monitoring screen in each actual construction area on the display terminal of the early warning linkage device is adjusted.

2. The method for early warning of substation electromechanical equipment safety protection based on electronic virtual fence according to claim 1 is characterized by: The substation construction area model includes the actual construction areas to which the substation electromechanical equipment belongs and the distribution locations of the substation electromechanical equipment in each actual construction area; the substation construction area model is constructed by using the distribution locations of the substation electromechanical equipment and satellite remote sensing images of the actual construction area; In the process of generating the electronic virtual fence area in the substation construction area model, the access paths and building distribution locations in the actual construction area to which the substation electromechanical equipment distribution location belongs are obtained, and any combination of each access path and each building distribution location within a preset radius around each substation electromechanical equipment distribution location is obtained to generate different combination schemes. Among the combination schemes that can enclose a closed area by connecting the position areas of corresponding combination elements, the combination scheme with the smallest closed area that contains the corresponding substation electromechanical equipment distribution location within the enclosed closed area is recorded as the optimal monitoring scheme for the substation electromechanical equipment distribution location; If the optimal monitoring scheme for the electromechanical equipment distribution location of the substation does not exist in the combination scheme formed by any combination of each access path and each building distribution location within a preset radius around the electromechanical equipment distribution location of the substation, then the electromechanical equipment distribution location of the substation that is closest to the corresponding electromechanical equipment distribution location of the substation is obtained and recorded as the collaborative monitoring location; the combination scheme formed by any combination of each access path and each building distribution location within a preset radius around the corresponding electromechanical equipment distribution location of the substation and the corresponding collaborative monitoring location is obtained; among the combination schemes that can enclose a closed area by connecting the position areas of the corresponding combination elements, the combination scheme with the smallest closed area area containing the corresponding electromechanical equipment distribution location of the substation is recorded as the optimal monitoring scheme for the electromechanical equipment distribution location of the substation; The closed area enclosed by the location areas of each combination element in the optimal monitoring scheme for the distribution location of the substation electromechanical equipment, which includes the distribution location of the corresponding substation electromechanical equipment, is used as the electronic virtual fence area of the corresponding substation electromechanical equipment in the substation construction area model.

3. The method for early warning of substation electromechanical equipment safety protection based on electronic virtual fence according to claim 1 is characterized by: The intrusion feature extraction results of the monitoring screen in S2 include the facial feature recognition results of each intruder, each intrusion trajectory and the behavioral feature recognition results of each intrusion trajectory; The intrusion trajectory behavior feature recognition result represents a set consisting of the deviation rate between the intrusion trajectory and the shortest path from the intrusion starting point to the nearest substation electromechanical equipment, the intrusion trajectory return rate, and the behavior pattern deviation coefficient; The deviation rate between the intrusion trajectory and the shortest path from the intrusion starting point to the nearest substation electromechanical equipment is equal to 1 minus the length of the overlapping section between the intrusion trajectory and the shortest path from the intrusion starting point to the nearest substation electromechanical equipment divided by the total length of the intrusion trajectory; The intrusion trajectory reentry rate is equal to the ratio of the intrusion distance with reentry behavior in the intrusion trajectory to the total length of the intrusion trajectory; The behavior pattern deviation coefficient is equal to the ratio of the frequency of abnormal activities in which the user's behavior pattern deviates during the intrusion process divided by the total length of the intrusion trajectory; The abnormal activities of the user behavior pattern deviation represent the deviation of the intrusion trajectory compared to the shortest path from the intrusion starting point to the nearest substation electromechanical equipment, and the deviation from the regression shortest path behavior at each decision point after the trajectory deviation. The decision points include intersections passed through and locations where the stay exceeds a preset time.

4. The method for early warning of substation electromechanical equipment safety protection based on electronic virtual fence according to claim 3 is characterized by: The risk assessment information of the corresponding electronic virtual fence area generated in S2 includes the electronic virtual fence area risk assessment value of each substation electromechanical equipment in the substation construction area model; The calculation formula for the risk assessment value of the electronic virtual fence area of each substation electromechanical equipment in the substation construction area model is as follows: RA n =max{RA (n,t) |t∈[TD-TZ,TD]} Among them, RA n Represents the risk assessment value of the electronic virtual fence area of the nth substation electromechanical equipment in the substation construction area model; RA (n,t) It represents the risk assessment value of the electronic virtual fence area of the electromechanical equipment of the nth substation in the substation construction area model from the start time of the most recent intrusion before time point t in the latest time period TZ based on the current time TD to time point t; the intrusion trajectory from the start time of the most recent intrusion before time point t in the latest time period TZ based on the current time TD to time point t is a continuous and uninterrupted path; if there is no intrusion behavior in the time period from time point TD-TZ to time point t, then RA is determined (n,t) =0;E (n,t) It represents the comparison coefficient between the facial feature recognition result of the intruder corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation and the facial features of the preset personnel in the database from the start time of the most recent intrusion before the time point t in the most recent time period TZ based on the current time TD to the time point t; if the facial features of the preset personnel in the database have a similarity greater than or equal to the preset similarity with the facial feature recognition result of the intruder, then it is determined that E (n,t) =0; otherwise, it is determined that E (n,t) =1;P (n,t) R represents the deviation rate between the intrusion trajectory in the intrusion trajectory behavior feature recognition result corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation and the shortest path from the intrusion starting point to the nearest electromechanical equipment of the substation from the start time of the most recent intrusion to the time point t in the most recent time period TZ based on the current time TD; (n,t) It represents the intrusion trajectory return rate in the intrusion trajectory behavior feature recognition result corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation from the start time of the most recent intrusion before time point t to time point t in the latest time period TZ based on the current time TD; BP (n,t) represents the behavioral pattern deviation coefficient in the intrusion trajectory behavior feature recognition results corresponding to the electronic virtual fence area of the electromechanical equipment of the nth substation from the start time of the most recent intrusion before time point t within the most recent time period TZ based on the current time TD to time point t; μ represents the preset weighting coefficient; e represents a natural constant; max{} represents the maximum value operation.

5. The method for early warning of substation electromechanical equipment safety protection based on electronic virtual fence according to claim 2 is characterized by: The S3 specifically includes: The formula for calculating the monitoring sensitivity control coefficient corresponding to each actual construction area in the corresponding electronic virtual fence area is as follows: SC m =max{RA (n，m，k) |k∈[1,QTY (n，m) ]}·SCZQ / SCZ Among them, SC m Indicates the monitoring sensitivity control coefficient corresponding to the mth actual construction area in the electronic virtual fence area; QTY (n，m) Indicates the number of electromechanical equipment in the substation that intersects the corresponding electronic virtual fence area and the mth actual construction area in the nth electronic virtual fence area; RA (n，m，k) Represents the risk assessment value of the electronic virtual fence area of the kth substation electromechanical equipment where the corresponding electronic virtual fence area intersects with the mth actual construction area in the nth electronic virtual fence area; SCZ represents the sum of the monitoring sensitivity control coefficients of the actual construction area to which each substation electromechanical equipment belongs predicted at the current time; the monitoring sensitivity control coefficient of the actual construction area to which the substation electromechanical equipment belongs predicted at the current time is equal to the maximum value of the risk assessment values of each electronic virtual fence area whose intersection area is the actual construction area to which the corresponding substation electromechanical equipment belongs; SCZQ represents the sum of the monitoring sensitivity control coefficients of the actual construction area to which each substation electromechanical equipment belongs stored in the database at the current time; The monitoring status warning information of the corresponding electronic virtual fence includes a set of monitoring sensitivity control coefficients of the actual construction area to which each substation electromechanical equipment belongs at the current time, and a set of substation electromechanical equipment whose risk assessment value in the electronic virtual fence area is not 0.

6. The method for early warning of substation electromechanical equipment safety protection based on electronic virtual fence according to claim 1 is characterized by: When the electronic virtual fence area in the substation construction area model is updated and adjusted in S4, the preset radius corresponding to the nth substation electromechanical equipment when the electronic virtual fence area is constructed stored in the current time database is obtained, which is recorded as L n ; The monitoring sensitivity control coefficient of the actual construction area of the electromechanical equipment of the nth substation predicted at the current time is recorded as SCY n ; The monitoring sensitivity control coefficient of the actual construction area of the nth substation electromechanical equipment stored in the current time database is recorded as SCB n ; Update the preset radius corresponding to the electromechanical equipment of the nth substation when constructing the electronic virtual fence area stored in the current time database, and record the corresponding update result as LG n , LG n =L n ·SCY n / SCB n The electronic virtual fence area in the updated and adjusted nth substation construction area model is the updated result LG of the preset radius corresponding to the nth substation electromechanical equipment stored in the current time database. n Reconstructed electronic virtual fence area.

7. The method for early warning of substation electromechanical equipment safety protection based on electronic virtual fence according to claim 1 is characterized by: When updating and adjusting the control level of the electronic virtual fence area in the substation construction area model in S4, the control priority of the electronic virtual fence area in the substation construction area model is equal to the sequence number of the corresponding electronic virtual fence area in the first control sequence; the first control sequence is the result of sorting the electronic virtual fence areas in descending order according to the most recently obtained average values of the monitoring sensitivity control coefficients corresponding to the actual construction areas in the corresponding electronic virtual fence areas, and the positions of the electronic virtual fence areas in the first control sequence that have the same average values of the monitoring sensitivity control coefficients corresponding to the actual construction areas are randomly arranged; In the process of storing the updated adjustment results of the electronic virtual fence area and its prevention and control level in the substation construction area model in the database, the updated result of the preset radius corresponding to the nth substation electromechanical equipment when constructing the electronic virtual fence area stored in the database at the current time replaces the original data in the database; the updated adjustment results of the electronic virtual fence area and its prevention and control level in the substation construction area model replace the original data in the database.

8. The method for early warning of substation electromechanical equipment safety protection based on electronic virtual fence according to claim 7 is characterized by: The S5 includes: According to the control level of the electronic virtual fence area in the substation construction area model from high to low, the monitoring images of each actual construction area contained in the electronic virtual fence area corresponding to each substation electromechanical equipment whose risk assessment value of the electronic virtual fence area is not 0 are presented in turn on the display terminal screen of the early warning linkage device.

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