A high-voltage cable fault online monitoring and location system

Abstract

This invention relates to the field of cable fault monitoring technology, specifically to an online monitoring and location system for high-voltage cable faults. The system includes: a sensing module for sensing real-time operating parameters of the high-voltage cable; a receiving module for receiving the real-time operating parameters sensed by the sensing module; an analysis module for iterating through the real-time operating parameters received by the receiving module and analyzing the changing trends of these parameters; and a judgment module for continuously receiving the changing trends of the real-time operating parameters analyzed by the analysis module and determining whether a suspected fault exists in the cable. This invention, through the deployment design of multiple sensors, enables the sensors to collect effective operating parameters of the high-voltage circuit. Further analysis of these effective operating parameters allows for the determination of whether a suspected fault exists in the high-voltage cable. Simultaneously, based on the determination results, the system controls the opening and closing of the high-voltage cable, thus providing a safe maintenance effect for the high-voltage cable.

Description

Technical Field

[0001] This invention relates to the field of cable fault monitoring technology, specifically to an online monitoring and location system for high-voltage cable faults. Background Technology

[0002] High-voltage cable fault management is of paramount importance. It encompasses fault monitoring, diagnosis, and location technologies. Through real-time monitoring with advanced equipment, fault types and causes can be quickly and accurately diagnosed, and their locations precisely pinpointed. Timely repairs reduce power outage losses, ensure stable grid operation, and guarantee the reliability and security of power supply.

[0003] The invention patent application with application number 202410745772.1 discloses a method for online monitoring and fault location of high-voltage power cables. The method comprises the following steps: establishing an accurate cable network model and optimizing the layout of monitoring points to ensure coverage of different parts of the cable network and capture of the propagation path of fault signals; dividing the data acquisition process of the monitoring points into several fixed-duration windows, collecting data from all monitoring points within each window, and storing the collected data; further dividing the fixed-duration windows into several equal-duration sub-time periods, analyzing the data from each monitoring point within each sub-time period, and calculating its data acquisition frequency; comprehensively analyzing the data acquisition frequencies of all sub-time periods under each fixed-duration window, classifying the monitoring points into failure points, abnormal points, and normal points; for abnormal points, issuing early warnings to relevant personnel, and using other normally functioning monitoring points to compensate for the data collected from the abnormal points, thereby improving data acquisition accuracy.

[0004] The application aims to address the problem that "in the process of fault location during online monitoring of high-voltage power cables, if the monitoring point is abnormal, the existing technology usually directly uses an early warning method to prompt maintenance and management personnel to maintain and manage the corresponding monitoring point. The system cannot perform autonomous and efficient processing. During abnormal maintenance, the abnormality of the monitoring point will lead to inaccurate or missing monitoring data, thereby delaying the discovery of potential faults. Failure to discover problems in the cable system in a timely manner may lead to further deterioration of potential faults, increase maintenance and repair costs, and may cause irreversible damage."

[0005] However, the current high-voltage cable faults are mainly monitored and detected by regular manual inspections and analysis of power parameters at the power supply and consumption ends.

[0006] The aforementioned methods have different shortcomings in terms of the comprehensiveness or timeliness of monitoring and detection, making it difficult to satisfy both comprehensiveness and timeliness.

[0007] Therefore, we propose an online monitoring and location system for high-voltage cable faults. Summary of the Invention

[0008] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a high-voltage cable fault online monitoring and location system, which solves the technical problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A high-voltage cable fault online monitoring and location system, comprising:

[0011] The system comprises the following modules: a sensing module for sensing real-time operating parameters of the high-voltage cable; a receiving module for receiving the real-time operating parameters of the high-voltage cable sensed by the sensing module; an analysis module for traversing the real-time operating parameters received by the receiving module and analyzing the changing trends of these parameters; a judgment module for continuously receiving the changing trends of the real-time operating parameters analyzed by the analysis module and determining whether the cable has a suspected fault; a braking module for obtaining the judgment result from the judgment module and, if the judgment result is yes, controlling the high-voltage cable to terminate its current power transmission task; and a feedback module for feeding back the judgment result from the judgment module and, if the judgment result is yes, locating the high-voltage cable suspected of having a fault and feeding back the location result.

[0012] The sensing module is connected to a control unit and a storage unit via a wireless network. The sensing module is also connected to a receiving module via a wireless network. The receiving module is connected to the storage unit via a wireless network. The receiving module is connected to an analysis module and a judgment module via a wireless network. The judgment module is connected to a recording unit via a wireless network. The recording unit is connected to the analysis module via a wireless network. The judgment module is connected to a braking module and a feedback module via a wireless network.

[0013] Furthermore, the sensing module is integrated with a temperature sensor, a current sensor, and a pair of position sensors. The sensing module is set in several groups, and each group of sensing modules is deployed on the surface of the high-voltage cable. Each group of high-voltage cable has no less than two sensing modules deployed on its surface, and they are symmetrical to each other relative to the surface of the high-voltage cable.

[0014] The sensing module has sub-modules at its lower level, including:

[0015] The control unit is used to set the operating cycle of the sensing module in real time and control the real-time operation of the sensing module.

[0016] The storage unit is used to receive the real-time operating parameters of the high-voltage cable sensed by the sensing module, configure the sensing timestamp mark for the real-time operating parameters of the high-voltage cable, and store them.

[0017] The control unit operates in real time based on the operating cycle of the sensing module, running once within each sensing module's operating cycle.

[0018] Furthermore, the logical representation of setting the operating cycle of the sensing module in real time in the control unit is as follows:

[0019]

[0020] In the formula: d is the operating cycle of the sensing module; d0 is the initial operating cycle of the sensing module; The average number of electricity requests made per unit time by users served by the high-voltage cable; m is the number of users currently served by the high-voltage cable; λ represents the average electricity consumption per unit time for the current power users served by the high-voltage cable; λ is the normalization factor.

[0021] Among them, determine and The unit time is based on a user-defined value on the system side, with a normalization factor λ > 0, and the normalization factor λ participates in... When performing operations, make

[0022] Furthermore, when receiving real-time operating parameters of the high-voltage cable, the receiving module takes the storage unit as the receiving target and receives the real-time operating parameters of the high-voltage cable in the storage unit. During the receiving phase of the real-time operating parameters of the high-voltage cable, the receiving module selects the real-time operating parameters of the high-voltage cable based on the timestamp of the real-time operating parameters of the high-voltage cable, so that the real-time operating parameters of the high-voltage cable received by the receiving module each time are the latest stored real-time operating parameters of the high-voltage cable in no less than three sets of storage units.

[0023] After receiving the real-time operating parameters of the high-voltage cable, the receiving unit synchronously picks up the high-voltage cable position information sensed by the position sensor in the real-time operating parameters of the high-voltage cable, and constructs a line segment model representing the attitude of the high-voltage cable based on the high-voltage cable position information sensed by each group of sensing modules.

[0024] Furthermore, the logic for analyzing the changing trends of real-time operating parameters of high-voltage cables in the analysis module is expressed as follows:

[0025]

[0026] In the formula: θ represents the changing trend value of the real-time operating parameters of the high-voltage cable; n represents the set of source periods for the real-time operating parameters of the high-voltage cable; c i The temperature of the high-voltage cable sensed by the sensing module in the i-th cycle; I i χ represents the high-voltage cable current value sensed by the sensing module in the i-th cycle. iThe fluctuation amplitude of the line segment model constructed from the high-voltage cable location information sensed by the sensing module in the i-th cycle; p i The symmetry of the line segment model constructed from the high-voltage cable location information sensed by the sensing module in the i-th cycle; θ all The values ​​representing the changing status of real-time operating parameters of the power grid composed of high-voltage cables; θ j The real-time operating parameters of high-voltage cable j represent the changing trends.

[0027] in, Table Find the mean. Table When the system is serving the fault monitoring of a group of high-voltage cables, it calculates the change status value based on equation (1). When the system is serving the fault monitoring of a power grid consisting of no less than a group of high-voltage cables, it calculates the change status value based on equation (1) combined with equation (2).

[0028] Furthermore, the symmetry of the line segment model and the fluctuation range of the line segment model are obtained by the following formula:

[0029]

[0030] In the formula: d left (a α ,b β ) represents the distance between the endpoints of the left-hand segments in two sets of line segment models derived from the same high-voltage cable, after the image of any set of line segment models is mirrored based on the midpoint of the high-voltage cable; d is the distance between the endpoints of the left-hand segments in the two sets of line segment models on the same side. right (a α ,b β ) represents the distance between the endpoints of the right-hand segments of two sets of line segment models originating from the same high-voltage cable, after mirroring any set of line segment models based on the midpoint of the high-voltage cable; ∠α and ∠β are the angles formed by the two extended line segment models and the perpendicular line drawn at the intersection point of the two sets of line segment models originating from the same high-voltage cable after infinitely extending the near ends of the two sets of line segment models; γ is an adjustment factor.

[0031] The adjustment factor γ takes the value of 1 or -1. When ∠α>∠β, γ=-1, and when ∠α≤∠β, γ=1.

[0032] Furthermore, the determination module is equipped with a fault determination threshold. The determination module compares the fault determination threshold with the changes in the real-time operating parameters of the high-voltage cable to determine whether there is a suspected fault in the high-voltage cable.

[0033] Furthermore, the determination module is further configured with sub-modules, including:

[0034] The recording unit is used to record the changes in the real-time operating parameters of the high-voltage cable continuously received by the judgment module.

[0035] The changes in the real-time operating parameters of the high-voltage cable recorded in the recording unit are represented as θ1, θ2, ..., θ x-1 θ x or θ all1 θ all2 ..., θ allx-1 θ allx The determination module is at θ x-2 <θ x-1 <θ x or θ allx-2 <θ allx-1 <θ allx At that time, it was determined that there was a suspected fault in the high-voltage cable.

[0036] Furthermore, the feedback module is connected to a computer device, which serves as the feedback target for the judgment and positioning results;

[0037] The feedback module performs the operation of locating high-voltage cables suspected of being faulty, and this operation only occurs when the analysis result in the analysis module is θ. all The system executes at specific times, and the feedback module obtains θ during execution. all The θ used in the calculation j θ j+1 θ j+2 ..., θ j θ j+1 θ j+2 Arrange θ from largest to smallest. j θ j+1 θ j+2 The location information of the high-voltage cable corresponding to each item in ... and θ j θ j+1 θ j+2 The bindings of each item in ... represent the location results.

[0038] Compared with known public technologies, the technical solution provided by this invention has the following beneficial effects:

[0039] This invention provides an online monitoring and location system for high-voltage cable faults. During operation, the system uses a multi-sensor deployment design to enable the sensors to collect effective operating parameters of the high-voltage circuit. Based on further analysis of the effective operating parameters of the high-voltage cable, it determines whether there is a suspected fault in the high-voltage cable. At the same time, based on the determination result, it controls the opening and closing of the high-voltage cable, thereby bringing a safety maintenance effect to the high-voltage cable.

[0040] In addition, it can locate high-voltage cables suspected of having faults when identifying them, thus providing assistance for fault maintenance of high-voltage cables. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of an online monitoring and location system for high-voltage cable faults;

[0043] Figure 2 This is an example diagram of the line segment model in this invention. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0045] The present invention will be further described below with reference to embodiments.

[0046] Example 1:

[0047] This embodiment describes an online monitoring and location system for high-voltage cable faults, such as... Figure 1 As shown, it includes:

[0048] The sensing module is used to sense the real-time operating parameters of the high-voltage cable;

[0049] The sensing module is integrated with a temperature sensor, a current sensor, and a pair of position sensors. There are several groups of sensing modules. Each group of sensing modules is deployed on the surface of the high-voltage cable. There are no fewer than two groups of sensing modules deployed on the surface of each high-voltage cable, and their positions are symmetrical with respect to the surface of the high-voltage cable.

[0050] The perception module has sub-modules, including:

[0051] The control unit is used to set the operating cycle of the sensing module in real time and control the real-time operation of the sensing module.

[0052] The storage unit is used to receive the real-time operating parameters of the high-voltage cable sensed by the sensing module, configure the sensing timestamp mark for the real-time operating parameters of the high-voltage cable, and store them.

[0053] The control unit operates in real time based on the operating cycle of the sensing module, and runs once within each operating cycle of the sensing module.

[0054] The receiving module is used to receive the real-time operating parameters of the high-voltage cable sensed by the sensing module.

[0055] The analysis module is used to traverse the real-time operating parameters of the high-voltage cable received by the receiving module and analyze the changing trend of the real-time operating parameters of the high-voltage cable.

[0056] The logic for analyzing the changing trends of real-time operating parameters of high-voltage cables in the analysis module is as follows:

[0057]

[0058] In the formula: θ represents the changing trend value of the real-time operating parameters of the high-voltage cable; n represents the set of source periods for the real-time operating parameters of the high-voltage cable; c i The temperature of the high-voltage cable sensed by the sensing module in the i-th cycle; I i χ represents the high-voltage cable current value sensed by the sensing module in the i-th cycle. i The fluctuation amplitude of the line segment model constructed from the high-voltage cable location information sensed by the sensing module in the i-th cycle; p i The symmetry of the line segment model constructed from the high-voltage cable location information sensed by the sensing module in the i-th cycle; θ all The values ​​representing the changing status of real-time operating parameters of the power grid composed of high-voltage cables; θ j The real-time operating parameters of high-voltage cable j represent the changing trends.

[0059] in, Table Find the mean. Table When the system is serving the fault monitoring of a group of high-voltage cables, the change status value is obtained based on equation (1). When the system is serving the fault monitoring of a power grid consisting of no less than a group of high-voltage cables, the change status value is obtained based on equation (1) combined with equation (2).

[0060] The symmetry and fluctuation range of the line segment model are obtained by the following formula:

[0061]

[0062] In the formula: d left (a α ,b β) represents the distance between the endpoints of the left-hand segments in two sets of line segment models derived from the same high-voltage cable, after the image of any set of line segment models is mirrored based on the midpoint of the high-voltage cable; d is the distance between the endpoints of the left-hand segments in the two sets of line segment models on the same side. right (a α ,b β ) represents the distance between the endpoints of the right-hand segments of two sets of line segment models originating from the same high-voltage cable, after mirroring any set of line segment models based on the midpoint of the high-voltage cable; ∠α and ∠β are the angles formed by the two extended line segment models and the perpendicular line drawn at the intersection point of the two sets of line segment models originating from the same high-voltage cable after infinitely extending the near ends of the two sets of line segment models; γ is an adjustment factor.

[0063] The adjustment factor γ takes the value of 1 or -1. When ∠α>∠β, γ=-1, and when ∠α≤∠β, γ=1.

[0064] The judgment module is used to continuously receive the changes in the real-time operating parameters of the high-voltage cable analyzed by the analysis module, and to determine whether there is a suspected fault in the cable.

[0065] The braking module is used to obtain the judgment result of the judgment module. When the judgment result is yes, it controls the high-voltage cable to end the current power transmission task.

[0066] The feedback module is used to provide feedback on the judgment result of the judgment module. When the judgment result is yes, the high-voltage cable suspected of being faulty is located and the location result is fed back.

[0067] The sensing module is connected to a control unit and a storage unit via a wireless network. The sensing module is also connected to a receiving module via a wireless network. The receiving module is connected to the storage unit via a wireless network. The receiving module is also connected to an analysis module and a judgment module via a wireless network. The judgment module is connected to a recording unit via a wireless network. The recording unit is connected to the analysis module via a wireless network. The judgment module is also connected to a braking module and a feedback module via a wireless network.

[0068] In this embodiment, the sensing module senses the real-time operating parameters of the high-voltage cable, the control unit synchronously sets the operating cycle of the sensing module in real time, and controls the sensing module to run in real time. The storage unit receives the real-time operating parameters of the high-voltage cable sensed by the sensing module in real time, configures the sensing timestamp mark for the real-time operating parameters of the high-voltage cable, and stores them. The receiving module then receives the real-time operating parameters of the high-voltage cable sensed by the sensing module. The analysis module then traverses the real-time operating parameters of the high-voltage cable received by the receiving module and analyzes the changing trend of the real-time operating parameters of the high-voltage cable. The judgment module further continuously receives the changing trend of the real-time operating parameters of the high-voltage cable analyzed by the analysis module and determines whether there is a suspected fault in the cable. The recording unit synchronously records the changing trend of the real-time operating parameters of the high-voltage cable continuously received by the judgment module. Then, the braking module obtains the judgment result of the judgment module. When the judgment result is yes, the high-voltage cable is controlled to end the current power transmission task. Finally, the judgment result of the judgment module is fed back through the feedback module. When the judgment result is yes, the high-voltage cable suspected of being faulty is located, and the location result is fed back.

[0069] Through the system operation in the above embodiments, a comprehensive and timely fault monitoring and location management service is provided for high-voltage cables, ensuring that high-voltage cables are safer and more stable during daily power transmission.

[0070] Example 2:

[0071] At the implementation level, based on Example 1, this example refers to... Figure 1 A further detailed description of the online monitoring and location system for high-voltage cable faults in Example 1 is provided below:

[0072] The logical representation of setting the operating cycle of the sensing module in real time in the control unit is as follows:

[0073]

[0074] In the formula: d is the operating cycle of the sensing module; d0 is the initial operating cycle of the sensing module; The average number of electricity requests made per unit time by users served by the high-voltage cable; m is the number of users currently served by the high-voltage cable; λ represents the average electricity consumption per unit time for the current power users served by the high-voltage cable; λ is the normalization factor.

[0075] Among them, determine and The unit time is based on a user-defined value on the system side, with a normalization factor λ > 0, and the normalization factor λ participates in... When performing operations, make

[0076] The above logical formula limits the operating cycle d of the sensing module, ensuring that the sensing module can adaptably sense the operating parameters of the high-voltage cable based on different operating cycles.

[0077] like Figure 1 As shown, when the receiving module receives real-time operating parameters of the high-voltage cable, it takes the storage unit as the receiving target and receives the real-time operating parameters of the high-voltage cable from the storage unit. During the receiving phase of the real-time operating parameters of the high-voltage cable, the high-voltage cable real-time operating parameters are selected based on the timestamp of the real-time operating parameters of the high-voltage cable, so that the real-time operating parameters of the high-voltage cable received by the receiving module each time are the latest stored real-time operating parameters of the high-voltage cable in no less than three sets of storage units.

[0078] After receiving the real-time operating parameters of the high-voltage cable, the receiving unit synchronously picks up the high-voltage cable position information sensed by the position sensor in the real-time operating parameters of the high-voltage cable, and constructs a line segment model representing the attitude of the high-voltage cable based on the high-voltage cable position information sensed by each group of sensing modules.

[0079] See Figure 2 As shown, and in conjunction with the above settings, the construction logic of the line segment model representing the attitude of the high-voltage cable is further defined.

[0080] Example 3:

[0081] At the implementation level, based on Example 1, this example refers to... Figure 1 A further detailed description of the online monitoring and location system for high-voltage cable faults in Example 1 is provided below:

[0082] The judgment module is equipped with a fault judgment threshold. The judgment module compares the fault judgment threshold with the changes in the real-time operating parameters of the high-voltage cable to determine whether there is a suspected fault in the high-voltage cable.

[0083] The decision module has subordinate settings sub-modules, including:

[0084] The recording unit is used to record the changes in the real-time operating parameters of the high-voltage cable continuously received by the judgment module.

[0085] The changes in the real-time operating parameters of the high-voltage cable recorded in the recording unit are represented as θ1, θ2, ..., θ x-1 θ x or θ all1 θ all2 ..., θ allx-1 θ allx The determination module is at θ x-2 <θ x-1 <θ x or θ allx-2 <θ allx-1<θ allx At that time, it was determined that there was a suspected fault in the high-voltage cable;

[0086] The feedback module is connected to a computer device, which serves as the feedback target for the judgment and positioning results.

[0087] The feedback module performs the operation of locating high-voltage cables suspected of being faulty, and this operation only occurs when the analysis result in the analysis module is θ. all The system executes at specific times, and the feedback module obtains θ during execution. all The θ used in the calculation j θ j+1 θ j+2 ..., θ j θ j+1 θ j+2 Arrange θ from largest to smallest. j θ j+1 θ j+2 The location information of the high-voltage cable corresponding to each item in ... and θ j θ j+1 θ j+2 The bindings of each item in ... represent the location results.

[0088] In this embodiment, the above settings provide further operational logic constraints for the determination module, ensuring that the determination module operates stably and outputs determination results.

[0089] In summary, during operation, the system in the above embodiments, through the deployment design of multiple sensors, enables the sensors to collect effective operating parameters of the high-voltage circuit. Based on further analysis of the effective operating parameters of the high-voltage cable, it can determine whether there is a suspected fault in the high-voltage cable. At the same time, based on the determination result, it can control the opening and closing of the high-voltage cable, bringing a safety maintenance effect to the high-voltage cable. In addition, when a suspected fault is determined in the high-voltage cable, it can locate the high-voltage cable with a suspected fault, providing assistance for fault maintenance of the high-voltage cable.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-voltage cable fault online monitoring and location system, characterized in that, include: The sensing module is used to sense the real-time operating parameters of the high-voltage cable; The receiving module is used to receive the real-time operating parameters of the high-voltage cable sensed by the sensing module. The analysis module is used to traverse the real-time operating parameters of the high-voltage cable received by the receiving module and analyze the changing trend of the real-time operating parameters of the high-voltage cable. The judgment module is used to continuously receive the changes in the real-time operating parameters of the high-voltage cable analyzed by the analysis module, and to determine whether there is a suspected fault in the cable. The braking module is used to obtain the judgment result of the judgment module. When the judgment result is yes, it controls the high-voltage cable to end the current power transmission task. The feedback module is used to provide feedback on the judgment result of the judgment module. When the judgment result is yes, the high-voltage cable suspected of being faulty is located and the location result is fed back. The sensing module has sub-modules at its lower level, including: The control unit is used to set the operating cycle of the sensing module in real time and control the real-time operation of the sensing module. The storage unit is used to receive the real-time operating parameters of the high-voltage cable sensed by the sensing module, configure the sensing timestamp mark for the real-time operating parameters of the high-voltage cable, and store them. The control unit operates in real time based on the operating cycle of the sensing module, and runs once within each operating cycle of the sensing module. The logical representation of setting the operating cycle of the sensing module in real time in the control unit is as follows: In the formula: d is the operating cycle of the sensing module; d0 is the initial operating cycle of the sensing module; The average number of electricity requests per unit time from users served by the high-voltage cable; m is the number of users currently served by the high-voltage cable; λ represents the average electricity consumption per unit time for the current power users served by the high-voltage cable; λ is the normalization factor. Among them, determine and The unit time is based on a user-defined value on the system side, with a normalization factor λ > 0, and the normalization factor λ participates in... When performing operations, make 2. The online monitoring and location system for high-voltage cable faults according to claim 1, characterized in that, The sensing module is integrated with a temperature sensor, a current sensor, and a pair of position sensors. Several groups of sensing modules are set up, and each group of sensing modules is deployed on the surface of the high-voltage cable. There are no less than two groups of sensing modules deployed on the surface of each high-voltage cable, and their positions are symmetrical with respect to the surface of the high-voltage cable.

3. The online monitoring and location system for high-voltage cable faults according to claim 1, characterized in that, When receiving real-time operating parameters of high-voltage cables, the receiving module takes the storage unit as the receiving target and receives the real-time operating parameters of high-voltage cables from the storage unit. During the receiving phase of the real-time operating parameters of high-voltage cables, the receiving module selects the real-time operating parameters of high-voltage cables based on the timestamp of the real-time operating parameters of high-voltage cables, so that the real-time operating parameters of high-voltage cables received by the receiving module each time are the latest stored real-time operating parameters of high-voltage cables in no less than three sets of storage units. After receiving the real-time operating parameters of the high-voltage cable, the receiving module synchronously picks up the high-voltage cable position information sensed by the position sensor in the real-time operating parameters of the high-voltage cable, and constructs a line segment model representing the attitude of the high-voltage cable based on the high-voltage cable position information sensed by each group of sensing modules.

4. The online monitoring and location system for high-voltage cable faults according to claim 1, characterized in that, The analysis logic for the change trend of real-time operating parameters of high-voltage cables in the analysis module is expressed as follows: In the formula: θ represents the changing trend value of the real-time operating parameters of the high-voltage cable; n represents the set of source periods for the real-time operating parameters of the high-voltage cable; c i The temperature of the high-voltage cable sensed by the sensing module in the i-th cycle; I i The value of the high-voltage cable current sensed by the sensing module in the i-th cycle; χ i The fluctuation amplitude of the line segment model constructed from the high-voltage cable location information sensed by the sensing module in the i-th cycle; p i The symmetry of the line segment model constructed from the high-voltage cable location information sensed by the sensing module in the i-th cycle; θ all The values ​​representing the changing status of real-time operating parameters of the power grid composed of high-voltage cables; θ j The real-time operating parameters of high-voltage cable j represent the changing trends. in, Indicates to Find the average value. Indicates to The average value is calculated. When the system is serving the fault monitoring of a group of high-voltage cables, the change status value is obtained based on equation (1). When the system is serving the fault monitoring of a power grid consisting of no less than a group of high-voltage cables, the change status value is obtained based on equation (1) combined with equation (2).

5. The online monitoring and location system for high-voltage cable faults according to claim 4, characterized in that, The symmetry and fluctuation range of the line segment model are obtained by the following formula: In the formula: d left (a α ,b β ) represents the distance between the endpoints of the left-hand segments in two sets of line segment models derived from the same high-voltage cable, after the image of any set of line segment models is mirrored based on the midpoint of the high-voltage cable; d is the distance between the endpoints of the left-hand segments in the two sets of line segment models on the same side. right (a α ,b β ) represents the distance between the endpoints of the right-hand segments of two sets of line segment models originating from the same high-voltage cable, after mirroring any set of line segment models based on the midpoint of the high-voltage cable; ∠α and ∠β are the angles formed by the two extended line segment models and the perpendicular line drawn at the intersection point after infinitely extending the near ends of the two sets of line segment models originating from the same high-voltage cable; γ is an adjustment factor; where the adjustment factor γ takes the value of 1 or -1, when ∠α>∠β, γ=-1, when ∠α≤∠β, γ=1.

6. The online monitoring and location system for high-voltage cable faults according to claim 1, characterized in that, The determination module is equipped with a fault determination threshold. The determination module compares the fault determination threshold with the changes in the real-time operating parameters of the high-voltage cable to determine whether there is a suspected fault in the high-voltage cable.

7. The online monitoring and location system for high-voltage cable faults according to claim 6, characterized in that, The judgment module is further subdivided into sub-modules, including: a recording unit for recording the changes in real-time operating parameters of the high-voltage cable continuously received by the judgment module; wherein the changes in real-time operating parameters of the high-voltage cable recorded in the recording unit are represented as θ1, θ2, ..., θ x-1 θ x or The decision module at θ x-2 <θ x-1 <θ x or At that time, it was determined that there was a suspected fault in the high-voltage cable.

8. A high-voltage cable fault online monitoring and location system according to claim 1 or 7, characterized in that, The feedback module is connected to a computer device, which serves as the feedback target for the judgment and location results. The feedback module performs the location operation for suspected faulty high-voltage cables only when the analysis result from the analysis module is θ. all The system executes at specific times, and the feedback module obtains θ during execution. all The θ used in the calculation j θ j+1 θ j+2 ..., θ j θ j+1 θ j+2 Arrange θ from largest to smallest. j θ j+1 θ j+2 The location information of the high-voltage cable corresponding to each item in ... and θ j θ j+1 θ j+2 The bindings of each item in ... represent the location results.

9. The online monitoring and location system for high-voltage cable faults according to claim 1, characterized in that, The sensing module is connected to a control unit and a storage unit via a wireless network. The sensing module is also connected to a receiving module via a wireless network. The receiving module is connected to the storage unit via a wireless network. The receiving module is connected to an analysis module and a judgment module via a wireless network. The judgment module is connected to a recording unit via a wireless network. The recording unit is connected to the analysis module via a wireless network. The judgment module is connected to a braking module and a feedback module via a wireless network.

Images