High-voltage cable fault on-line monitoring and positioning system

Abstract

The invention relates to the technical field of cable fault monitoring, in particular to a high-voltage cable fault online monitoring and positioning system, which comprises a sensing module used for sensing real-time operation parameters of a high-voltage cable; the receiving module is used for receiving the real-time operation parameters of the high-voltage cable sensed by the sensing module; the analysis module is used for traversing the real-time operation parameters of the high-voltage cable received in the receiving module and analyzing the change situation of the real-time operation parameters of the high-voltage cable; the judgment module is used for continuously receiving the change situation of the real-time operating parameters of the high-voltage cable analyzed in the analysis module and judging whether the cable has a suspected fault or not; through the arrangement position design of multiple sensors, the sensors can collect the effective operation parameters of the high-voltage circuit, whether the high-voltage cable has a suspected fault or not is judged based on further analysis of the effective operation parameters of the high-voltage cable, and meanwhile opening and closing control is conducted on the high-voltage cable based on the judgment result. And a safety maintenance effect is brought to the high-voltage cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable fault monitoring, and in particular to an online monitoring and positioning system for high-voltage cable faults. Background Art

[0002] High-voltage cable fault management is crucial. It covers fault monitoring, diagnosis and location technology. Through real-time monitoring with advanced equipment, the fault type and cause can be quickly and accurately diagnosed and precisely located. Timely repair can reduce power outage losses, ensure stable operation of the power grid, and ensure the reliability and safety of power supply.

[0003] The invention patent with application number 202410745772.1 discloses a method for online monitoring fault location of high-voltage power cables, which is characterized in that it includes the following steps: establishing an accurate cable network model, optimizing the layout of monitoring points, so that the arranged monitoring points cover different parts of the cable network, and ensuring that the propagation path of the fault signal is captured; dividing the data acquisition process of the monitoring points into several fixed-time windows, collecting data from all monitoring points within each window, and storing the collected data; further dividing the fixed-time window into several sub-periods of equal time, analyzing the data of each monitoring point in each sub-period, and calculating its data acquisition frequency; comprehensively analyzing the data acquisition frequency of all sub-periods under each fixed-time window, and dividing the monitoring points into failure points, abnormal points and normal points; for abnormal points, issuing early warning prompts to inform relevant personnel, and using other normally working monitoring points to compensate for the data collected by the abnormal points to improve data acquisition accuracy.

[0004] This application aims to solve the problem that "during the online monitoring and fault location process of high-voltage power cables, if the monitoring point monitors abnormally, the existing technology usually directly uses early warning to prompt maintenance managers to perform maintenance and management on the corresponding monitoring points. The system is unable to handle it autonomously and efficiently. During abnormal maintenance, abnormal monitoring points will cause inaccurate or missing monitoring data, thereby delaying the discovery of potential faults. Failure to promptly discover problems in the cable system may cause potential faults to further deteriorate, increase the cost of maintenance and repair, and may cause irreversible damage."

[0005] However, the current monitoring and detection of high-voltage cable faults still relies mainly on regular manual inspections and analysis of power parameters at the power supply and power consumption ends;

[0006] The above-mentioned methods have different shortcomings in terms of the comprehensiveness or timeliness of monitoring and testing, and it is difficult to meet the requirements of timeliness while ensuring the comprehensiveness of monitoring and testing.

[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 prior art, the present invention provides a high-voltage cable fault online monitoring and positioning system, which solves the technical problems raised in the above-mentioned background technology.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions:

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

[0011] A sensing module is used to sense the real-time operating parameters of the high-voltage cable; a receiving module is used to receive the real-time operating parameters of the high-voltage cable sensed by the sensing module; an analyzing module is used to traverse the real-time operating parameters of the high-voltage cable received in the receiving module and analyze the changing trend of the real-time operating parameters of the high-voltage cable; a determining module is used to continuously receive the changing trend of the real-time operating parameters of the high-voltage cable analyzed in the analyzing module and determine whether the cable has a suspected fault; a braking module is used to obtain the determination result of the determination module, and when the determination result is yes, control the high-voltage cable to end the current power transmission task; a feedback module is used to feedback the determination result of the determination module, and when the determination result is yes, locate the high-voltage cable with a suspected fault and feedback the positioning result;

[0012] The perception module is interactively connected to a control unit and a storage unit at a lower level through a wireless network, the perception module is interactively connected to a receiving module through a wireless network, the receiving module is interactively connected to the storage unit through a wireless network, the receiving module is interactively connected to an analysis module and a determination through a wireless network, the determination module is interactively connected to a recording unit at a lower level through a wireless network, the recording unit is interactively connected to the analysis module through a wireless network, and the determination module is interactively connected to a braking module and a feedback module through a wireless network.

[0013] Furthermore, the sensing module is integrated by a temperature sensor, a current sensor, and a position sensor in groups of two. The sensing module is provided in several groups, each group of sensing modules is deployed on the surface of the high-voltage cable, and at least two groups of sensing modules are deployed on the surface of each group of high-voltage cables, and the sensing modules are symmetrical relative to the surface positions of the high-voltage cables.

[0014] The perception module is provided with submodules at the lower level, including:

[0015] A control unit, used to set the operating cycle of the perception module in real time and control the real-time operation of the perception module;

[0016] A storage unit, used to receive the real-time operating parameters of the high-voltage cable sensed by the sensing module, configure a 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 and operates once in each operating cycle of the sensing module.

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

[0019]

[0020] Where: d is the operating cycle of the perception module; d0 is the initial operating cycle of the perception module; is the average number of electricity requests per unit time by electricity users served by the high-voltage cable; m is the number of electricity users currently served by the high-voltage cable; is the average power consumption per unit time of the power users currently served by the high-voltage cable; λ is the normalization factor;

[0021] Among them, determine and The unit time is based on the user-defined system end, the normalization factor λ>0, and the normalization factor λ participates in When operating with

[0022] Furthermore, when receiving the real-time operation parameters of the high-voltage cable, the receiving module takes the storage unit as the receiving target, receives the real-time operation parameters of the high-voltage cable in the storage unit, and at the stage of receiving the real-time operation parameters of the high-voltage cable, selects the real-time operation parameters of the high-voltage cable based on the timestamp mark of the real-time operation parameters of the high-voltage cable, so that the real-time operation parameters of the high-voltage cable received by the receiving module each time are the latest real-time operation parameters of the high-voltage cable stored in no less than three groups of storage units;

[0023] After the receiving unit receives the real-time operating parameters of the high-voltage cable, it 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 posture of the high-voltage cable based on the high-voltage cable position information sensed by each group of perception modules.

[0024] Furthermore, the change analysis logic of the real-time operating parameters of the high-voltage cable in the analysis module is expressed as:

[0025]

[0026] Where: θ is the change trend value of the real-time operating parameters of the high-voltage cable; n is the set of source cycles of the real-time operating parameters of the high-voltage cable; c i is the high-voltage cable temperature sensed by the sensing module in the i-th cycle; I i is the high-voltage cable current value sensed by the sensing module in the i-th cycle; iis the fluctuation amplitude of the line segment model constructed by the sensing module sensing the high-voltage cable position information in the i-th cycle; p i The symmetry of the line segment model constructed by the i-th cycle sensing module sensing the high-voltage cable position information; θ all is the change status value of the real-time operating parameters of the high-voltage cable grid; θ j is the change status value of the real-time operating parameters of the high-voltage cable j;

[0027] in, Table pair The average, Table pair When the system serves the fault monitoring of a group of high-voltage cables, the change situation value is obtained based on formula (1). When the system serves the fault monitoring of a power grid composed of no less than one group of high-voltage cables, the change situation value is obtained based on formula (1) combined with formula (2).

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

[0029]

[0030] Where: d left (a α ,b β ) is the distance between the endpoints of the left segments on the same side of the two sets of line segment models, after any set of line segment models is mirrored based on the midpoint of the high-voltage cable, in the two sets of line segment models from the same high-voltage cable; d right (a α ,b β ) is the distance between the endpoints of the right line segments on the two sets of line segment models on the same side of the two sets of line segment models derived from the same high-voltage cable, after any set of line segment models is mirrored based on the midpoint of the high-voltage cable; ∠α, ∠β are the angles formed by the two sets of extended line segment models and the vertical line after the adjacent ends of the two sets of line segment models derived from the same high-voltage cable are infinitely extended and the vertical line is drawn at the intersection position; γ is the adjustment factor;

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

[0032] Furthermore, a fault determination threshold is set in the determination module, and the determination module determines whether there is a suspected fault in the high-voltage cable based on a comparison between the fault determination threshold and a change trend of the received real-time operating parameters of the high-voltage cable.

[0033] Furthermore, the determination module is provided with submodules at a lower level, including:

[0034] A recording unit, used to record the change trend of the real-time operating parameters of the high-voltage cable continuously received by the determination module;

[0035] Among them, the change trend of the real-time operating parameters of the high-voltage cable recorded in the recording unit is expressed as θ1, θ2, ..., θ x-1 ,θ x or θ all1 ,θ all2 , ..., θ allx-1 ,θ allx , the decision module is in θ x-2 <θ x-1 <θ x or θ allx-2 <θ allx-1 <θ allx When the high voltage cable is detected, it is determined that there is a suspected fault.

[0036] Furthermore, the feedback module is connected to a computer device, and the computer device is used as a feedback target for the determination result and the positioning result;

[0037] The feedback module locates the suspected faulty high-voltage cable only when the analysis result of the analysis module is θ all When executed, the feedback module runs to obtain θ all The θ used in the calculation j ,θ j+1 ,θ j+2 , ..., θ j ,θ j+1 ,θ j+2 ,...arrange from large to small, and put θ j ,θ j+1 ,θ j+2 , ... The corresponding high-voltage cable position information and θ j ,θ j+1 ,θ j+2 The binding of each item in ,... is the positioning result.

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

[0039] The present invention provides a high-voltage cable fault online monitoring and positioning system. During operation, the system uses a multi-sensor deployment position design to enable the sensors to collect effective operating parameters of the high-voltage circuit, and then further analyze the effective operating parameters of the high-voltage cable to determine whether the high-voltage cable has a suspected fault. At the same time, the high-voltage cable is opened and closed based on the determination result, thereby achieving a safe maintenance effect for the high-voltage cable.

[0040] In addition, when determining a suspected fault in a high-voltage cable, it is also possible to locate the high-voltage cable with the suspected fault, providing assistance for the fault maintenance of the high-voltage cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 It is a structural schematic diagram of a high-voltage cable fault online monitoring and positioning system;

[0043] Figure 2 This is an example diagram of the line segment model in the present invention. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0045] The present invention will be further described below in conjunction with the embodiments.

[0046] Embodiment 1:

[0047] A high-voltage cable fault online monitoring and positioning system of this embodiment, such as Figure 1 As shown, including:

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

[0049] The sensing module is integrated by a temperature sensor, a current sensor, and a position sensor in pairs. 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 less than two groups of sensing modules deployed on the surface of each group of high-voltage cables, and the positions relative to the surface of the high-voltage cables are symmetrical to each other.

[0050] The perception module is equipped with submodules, including:

[0051] A control unit, used to set the operating cycle of the perception module in real time and control the real-time operation of the perception module;

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

[0053] Wherein, the control unit operates in real time based on the sensing module operation cycle and operates once in each sensing module operation cycle;

[0054] A receiving module, used for receiving real-time operating parameters of the high-voltage cable sensed by the sensing module;

[0055] An analysis module, used to traverse the real-time operating parameters of the high-voltage cable received in the receiving module, and analyze the change trend of the real-time operating parameters of the high-voltage cable;

[0056] The change analysis logic of the real-time operating parameters of the high-voltage cable in the analysis module is expressed as follows:

[0057]

[0058] Where: θ is the change trend value of the real-time operating parameters of the high-voltage cable; n is the set of source cycles of the real-time operating parameters of the high-voltage cable; c i is the high-voltage cable temperature sensed by the sensing module in the i-th cycle; I i is the high-voltage cable current value sensed by the sensing module in the i-th cycle; i is the fluctuation amplitude of the line segment model constructed by the sensing module sensing the high-voltage cable position information in the i-th cycle; p i The symmetry of the line segment model constructed by the i-th cycle sensing module sensing the high-voltage cable position information; θ all is the change status value of the real-time operating parameters of the high-voltage cable grid; θ j is the change status value of the real-time operating parameters of the high-voltage cable j;

[0059] in, Table pair The average, Table pair When the system serves the fault monitoring of a group of high-voltage cables, the change situation value is obtained based on formula (1). When the system serves the fault monitoring of a power grid composed of no less than one group of high-voltage cables, the change situation value is obtained based on formula (1) combined with formula (2);

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

[0061]

[0062] Where: d left (a α ,b β) is the distance between the endpoints of the left segments on the same side of the two sets of line segment models, after any set of line segment models is mirrored based on the midpoint of the high-voltage cable, in the two sets of line segment models from the same high-voltage cable; d right (a α ,b β ) is the distance between the endpoints of the right line segments on the two sets of line segment models on the same side of the two sets of line segment models derived from the same high-voltage cable, after any set of line segment models is mirrored based on the midpoint of the high-voltage cable; ∠α, ∠β are the angles formed by the two sets of extended line segment models and the vertical line after the adjacent ends of the two sets of line segment models derived from the same high-voltage cable are infinitely extended and the vertical line is drawn at the intersection position; γ is the adjustment factor;

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

[0064] A determination module is used to continuously receive the change trend of the real-time operating parameters of the high-voltage cable analyzed in the analysis module, and determine whether there is a suspected fault in the cable;

[0065] The braking module is used to obtain the determination result of the determination module, and when the determination result is yes, control the high-voltage cable to end the current power transmission task;

[0066] A feedback module is used to feed back the determination result of the determination module. When the determination result is yes, the high-voltage cable suspected of failure is located and the positioning result is fed back;

[0067] The perception module is interactively connected to a control unit and a storage unit at its lower level through a wireless network, the perception module is interactively connected to a receiving module through a wireless network, the receiving module is interactively connected to the storage unit through a wireless network, the receiving module is interactively connected to an analysis module and a determination through a wireless network, the determination module is interactively connected to a recording unit at its lower level through a wireless network, the recording unit is interactively connected to the analysis module through a wireless network, and the determination module is interactively connected to a braking module and a feedback module through a wireless network.

[0068] In this embodiment, the sensing module operates to sense 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, controls the sensing module to operate 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 post-operates to receive the real-time operating parameters of the high-voltage cable sensed by the sensing module, and then the analysis module traverses the real-time operating parameters of the high-voltage cable received in the receiving module to analyze the changing trend of the real-time operating parameters of the high-voltage cable, the determination module further continuously receives the changing trend of the real-time operating parameters of the high-voltage cable analyzed in the analysis module to determine whether the cable has a suspected fault, the recording unit synchronously records the changing trend of the real-time operating parameters of the high-voltage cable continuously received by the determination module, and then the braking module obtains the determination result of the determination module, and when the determination result is yes, the high-voltage cable is controlled to end the current power transmission task, and finally the determination result of the determination module is fed back through the feedback module, and when the determination result is yes, the high-voltage cable with a suspected fault is located, and the positioning result is fed back.

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

[0070] Embodiment 2:

[0071] In terms of specific implementation, based on Example 1, this example refers to Figure 1 A high-voltage cable fault online monitoring and positioning system in Example 1 is further described in detail:

[0072] The logic of setting the operating cycle of the perception module in real time in the control unit is expressed as:

[0073]

[0074] Where: d is the operating cycle of the perception module; d0 is the initial operating cycle of the perception module; is the average number of electricity requests per unit time by electricity users served by the high-voltage cable; m is the number of electricity users currently served by the high-voltage cable; is the average power consumption per unit time of the power users currently served by the high-voltage cable; λ is the normalization factor;

[0075] Among them, determine and The unit time is based on the user-defined system end, the normalization factor λ>0, and the normalization factor λ participates in When operating with

[0076] Through the above logic formula, the operating cycle d of the sensing module is limited to ensure that the sensing module can adaptively sense the operating parameters of the high-voltage cable based on different operating cycles.

[0077] like Figure 1 As shown, when receiving the real-time operation parameters of the high-voltage cable, the receiving module takes the storage unit as the receiving target, receives the real-time operation parameters of the high-voltage cable in the storage unit, and at the stage of receiving the real-time operation parameters of the high-voltage cable, selects the real-time operation parameters of the high-voltage cable based on the timestamp mark of the real-time operation parameters of the high-voltage cable, so that the real-time operation parameters of the high-voltage cable received by the receiving module each time are the latest real-time operation parameters of the high-voltage cable stored in no less than three groups of storage units;

[0078] After the receiving unit receives the real-time operating parameters of the high-voltage cable, it 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 posture of the high-voltage cable based on the high-voltage cable position information sensed by each group of perception modules.

[0079] See also Figure 2 As shown, combined with the above settings, the construction logic of the line segment model representing the posture of the high-voltage cable is further limited.

[0080] Embodiment 3:

[0081] In terms of specific implementation, based on Example 1, this example refers to Figure 1 A high-voltage cable fault online monitoring and positioning system in Example 1 is further described in detail:

[0082] A fault determination threshold is set in the determination module, and the determination module determines whether the high-voltage cable has a suspected fault based on the comparison between the fault determination threshold and the change trend of the received real-time operating parameters of the high-voltage cable;

[0083] The submodules of the judgment module include:

[0084] A recording unit, used to record the change trend of the real-time operating parameters of the high-voltage cable continuously received by the determination module;

[0085] Among them, the change trend of the real-time operating parameters of the high-voltage cable recorded in the recording unit is expressed as θ1, θ2, ..., θ x-1 ,θ x or θ all1 ,θ all2 , ..., θ allx-1 ,θ allx , the decision module is in θ x-2 <θ x-1 <θ x or θ allx-2 <θ allx-1<θ allx When the high voltage cable is judged to have a suspected fault;

[0086] The feedback module is connected to the computer device, and the computer device is used as a feedback target for the determination result and the positioning result;

[0087] The feedback module locates the suspected faulty high-voltage cable only when the analysis result of the analysis module is θ all When executed, the feedback module runs to obtain θ all The θ applied when obtaining j ,θ j+1 ,θ j+2 , ..., θ j ,θ j+1 ,θ j+2 ,...arrange from large to small, and put θ j ,θ j+1 ,θ j+2 , ... The corresponding high-voltage cable position information and θ j ,θ j+1 ,θ j+2 The binding of each item in ,... is the positioning result.

[0088] In this embodiment, through the above settings, further operation logic limitations are made for the determination module to ensure the stable operation of the output determination results of the determination module.

[0089] In summary, during operation of the system in the above embodiment, the deployment position design of multiple sensors enables the sensors to collect effective operating parameters of the high-voltage circuit, and then based on further analysis of the effective operating parameters of the high-voltage cable, determine whether there is a suspected fault in the high-voltage cable, and at the same time, control the opening and closing of the high-voltage cable based on the determination result, thereby bringing a safe maintenance effect to the high-voltage cable. In addition, when determining a suspected fault of the high-voltage cable, the high-voltage cable with the suspected fault can be located, thereby providing assistance for the fault maintenance of the high-voltage cable.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements 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 positioning system, characterized in that: include: A sensing module is used to sense the real-time operating parameters of the high-voltage cable; A receiving module, used for receiving real-time operating parameters of the high-voltage cable sensed by the sensing module; An analysis module, used to traverse the real-time operating parameters of the high-voltage cable received in the receiving module, and analyze the change trend of the real-time operating parameters of the high-voltage cable; A determination module is used to continuously receive the change trend of the real-time operating parameters of the high-voltage cable analyzed in the analysis module, and determine whether there is a suspected fault in the cable; The braking module is used to obtain the determination result of the determination module, and when the determination result is yes, control the high-voltage cable to end the current power transmission task; The feedback module is used to feed back the determination result of the determination module. When the determination result is yes, the high-voltage cable suspected of failure is located and the positioning result is fed back.

2. A high-voltage cable fault online monitoring and positioning system according to claim 1, characterized in that: The sensing module is integrated by a temperature sensor, a current sensor, and a position sensor in groups of two. The sensing module is provided in several groups, each group of sensing modules is deployed on the surface of the high-voltage cable, and at least two groups of sensing modules are deployed on the surface of each group of high-voltage cables, and the surface positions of the high-voltage cables are symmetrical to each other; The perception module is provided with submodules at the lower level, including: A control unit, used to set the operating cycle of the perception module in real time and control the real-time operation of the perception module; A storage unit, used to receive the real-time operating parameters of the high-voltage cable sensed by the sensing module, configure a 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 operates once in each operating cycle of the sensing module.

3. A high-voltage cable fault online monitoring and positioning system according to claim 1, characterized in that: The logic expression of setting the operating cycle of the sensing module in real time in the control unit is: Where: d is the operating cycle of the perception module; d0 is the initial operating cycle of the perception module; is the average number of electricity requests per unit time by electricity users served by the high-voltage cable; m is the number of electricity users currently served by the high-voltage cable; The average power consumption per unit time of the power users currently served by the high-voltage cable; λ is the normalization factor; Among them, determine and The unit time is based on the user-defined system end, the normalization factor λ>0, and the normalization factor λ participates in When operating with 4. A high-voltage cable fault online monitoring and positioning system according to claim 1, characterized in that: When receiving the real-time operation parameters of the high-voltage cable, the receiving module takes the storage unit as the receiving target, receives the real-time operation parameters of the high-voltage cable in the storage unit, and selects the real-time operation parameters of the high-voltage cable based on the timestamp mark of the real-time operation parameters of the high-voltage cable at the stage of receiving the real-time operation parameters of the high-voltage cable, so that the real-time operation parameters of the high-voltage cable received by the receiving module each time are the latest real-time operation parameters of the high-voltage cable stored in no less than three groups of storage units; After the receiving unit receives the real-time operating parameters of the high-voltage cable, it 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 posture of the high-voltage cable based on the high-voltage cable position information sensed by each group of perception modules.

5. A high-voltage cable fault online monitoring and positioning system according to claim 1, characterized in that: The change analysis logic of the real-time operating parameters of the high-voltage cable in the analysis module is expressed as follows: Where: θ is the change trend value of the real-time operating parameters of the high-voltage cable; n is the set of source cycles of the real-time operating parameters of the high-voltage cable; c i is the high-voltage cable temperature sensed by the sensing module in the i-th cycle; I i is the high-voltage cable current value sensed by the sensing module in the i-th cycle; χ i is the fluctuation amplitude of the line segment model constructed by the sensing module sensing the high-voltage cable position information in the i-th cycle; p i The symmetry of the line segment model constructed by the i-th cycle sensing module sensing the high-voltage cable position information; θ all is the change status value of the real-time operating parameters of the high-voltage cable grid; θ j is the change status value of the real-time operating parameters of the high-voltage cable j; in, Table pair The average, Table pair When the system serves the fault monitoring of a group of high-voltage cables, the change situation value is obtained based on formula (1). When the system serves the fault monitoring of a power grid composed of no less than one group of high-voltage cables, the change situation value is obtained based on formula (1) combined with formula (2).

6. A high-voltage cable fault online monitoring and positioning system according to claim 5, characterized in that: The symmetry of the line segment model and the fluctuation range of the line segment model are obtained by the following formula: Where: d left (a α ,b β ) is the distance between the endpoints of the left segments on the same side of the two sets of line segment models, after any set of line segment models is mirrored based on the midpoint of the high-voltage cable, in the two sets of line segment models from the same high-voltage cable; d right (a α ,b β ) is the distance between the endpoints of the right line segments on the two sets of line segment models on the same side of the two sets of line segment models derived from the same high-voltage cable, after any set of line segment models is mirrored based on the midpoint of the high-voltage cable; ∠α, ∠β are the angles formed by the two sets of extended line segment models and the vertical line after the adjacent ends of the two sets of line segment models derived from the same high-voltage cable are infinitely extended and the vertical line is drawn at the intersection position; γ is the adjustment factor; The adjustment factor γ takes a value of 1 or -1. When ∠α>∠β, γ=-1, and when ∠α≤∠β, γ=1.

7. A high-voltage cable fault online monitoring and positioning system according to claim 1, characterized in that: A fault determination threshold is set in the determination module, and the determination module determines whether there is a suspected fault in the high-voltage cable based on a comparison between the fault determination threshold and a change trend of the received real-time operating parameters of the high-voltage cable.

8. A high-voltage cable fault online monitoring and positioning system according to claim 7, characterized in that: The determination module is provided with submodules at the lower level, including: A recording unit, used to record the change trend of the real-time operating parameters of the high-voltage cable continuously received by the determination module; Among them, the change trend of the real-time operating parameters of the high-voltage cable recorded in the recording unit is expressed as θ1, θ2, ..., θ x-1 ,θ x or The decision module is in θ x-2 <θ x-1 <θ x or When the high voltage cable is detected, it is determined that there is a suspected fault.

9. A high-voltage cable fault online monitoring and positioning system according to claim 1 or 8, characterized in that: The feedback module is connected to the computer device, and the computer device is used as the feedback target of the determination result and the positioning result; The feedback module locates the suspected faulty high-voltage cable only when the analysis result of the analysis module is θ all When executed, the feedback module runs to obtain θ all The θ used in the calculation j ,θ j+1 ,θ j+2 , ..., θ j ,θ j+1 ,θ j+2 , ...arrange from large to small, and put θ j ,θ j+1 ,θ j+2 , ... The corresponding high-voltage cable position information and θ j ,θ j+1 ,θ j+2 The binding of each item in ,... is the positioning result.

10. A high-voltage cable fault online monitoring and positioning system according to claim 1, characterized in that: The perception module is interactively connected to a control unit and a storage unit at a lower level through a wireless network, the perception module is interactively connected to a receiving module through a wireless network, the receiving module is interactively connected to the storage unit through a wireless network, the receiving module is interactively connected to an analysis module and a determination through a wireless network, the determination module is interactively connected to a recording unit at a lower level through a wireless network, the recording unit is interactively connected to the analysis module through a wireless network, and the determination module is interactively connected to a braking module and a feedback module through a wireless network.

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