Safety protection method and system for cable

Abstract

The invention discloses a safety protection method and system for a cable, and relates to the technical field of cable monitoring, when monitoring data of a plurality of cable areas are received, nondimensionalization processing is carried out on the monitoring data to obtain a plurality of target monitoring data, and multi-dimensional fusion evaluation is carried out on the target monitoring data to obtain a plurality of target monitoring data; the method comprises the steps of obtaining a cable evaluation index corresponding to each cable region, performing safety evaluation on each cable evaluation index based on a preset evaluation threshold value to obtain an evaluation result corresponding to each cable region, and performing fault isolation operation on the cable region when the evaluation result corresponding to the cable region is abnormal operation. The technical problems that in the prior art, safety early warning is carried out on the cable mainly by obtaining the electrical parameters of the cable in combination with a simple threshold value, but the method has the high false alarm rate, frequent false triggering of an isolation switch on the cable is likely to be caused, and the reliability of cable operation is reduced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable monitoring, and in particular to a cable safety protection method and system. Background Art

[0002] As the core transmission medium of power grid systems, the operating status of power cables directly impacts the reliability and safety of power supply. With the acceleration of urbanization and the expansion of power grids, cable laying environments are becoming increasingly complex (such as underground pipeline corridors, bridges across rivers, and areas of high temperature and humidity). Traditional manual inspections are no longer able to meet the security requirements of modern power grids.

[0003] At present, the existing technology mainly obtains the electrical parameters of the cable and combines simple thresholds to provide cable safety warnings. However, this method has a high false alarm rate, which can easily lead to frequent false triggering of the isolation switch on the cable, reducing the reliability of cable operation. Summary of the Invention

[0004] The present invention provides a cable safety protection method and system, which solves the technical problem that the existing technology mainly obtains the electrical parameters of the cable and combines simple thresholds to provide cable safety warnings, but this method has a high false alarm rate, which easily leads to frequent false triggering of the isolation switch on the cable, thereby reducing the reliability of the cable operation.

[0005] A first aspect of the present invention provides a cable safety protection method, comprising:

[0006] When monitoring data of multiple cable areas are received, dimensionless processing is performed on each of the monitoring data to obtain multiple target monitoring data;

[0007] Performing multi-dimensional fusion evaluation on each of the target monitoring data to obtain a cable evaluation index corresponding to each of the cable areas;

[0008] Performing safety assessments on each of the cable assessment indexes based on a preset assessment threshold to obtain assessment results corresponding to each of the cable areas;

[0009] When the evaluation result corresponding to the cable area is abnormal operation, a fault isolation operation is performed on the cable area.

[0010] Optionally, the target monitoring data includes a start time, an end time, multiple electrical operation performance data, multiple electrical operation environment data, and multiple electrical transmission performance data. The step of performing multi-dimensional fusion evaluation on each of the target monitoring data to obtain a cable evaluation index corresponding to each of the cable areas includes:

[0011] Performing a difference process on the end time and the start time to obtain a first difference;

[0012] Performing a ratio processing on the first difference and the termination time to obtain a first ratio;

[0013] Performing performance evaluation on the electrical operation performance data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical operation performance indexes;

[0014] Performing environmental assessment on the electrical operating environment data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical operating environment indexes;

[0015] Performing transmission performance evaluation on the electrical transmission performance data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical transmission performance indexes;

[0016] The electrical operation performance index, electrical operation environment index and electrical transmission performance index corresponding to each of the cable areas are respectively input into a preset comprehensive evaluation function to obtain a cable evaluation index corresponding to each of the cable areas.

[0017] Optionally, the step of performing performance evaluation on the electrical operation performance data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical operation performance indexes includes:

[0018] Based on preset operating performance weights, weighted operations are performed on each of the electrical operating performance data to obtain multiple electrical operating performance values, wherein the electrical operating performance data includes current-related parameters, voltage-related parameters, temperature-related parameters, insulation state parameters, and reactance parameters;

[0019] performing average processing on the electrical operation performance values ​​corresponding to the respective cable areas to obtain a plurality of first average values;

[0020] Performing difference processing on the electrical operating performance value of each cable area at the current moment and the corresponding first mean value to obtain a plurality of second difference values;

[0021] The first ratio is multiplied by each of the second differences to obtain a plurality of electrical operation performance indexes.

[0022] Optionally, the step of performing environmental assessment on the electrical operating environment data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical operating environment indexes includes:

[0023] Based on preset operating environment weights, weighted operations are performed on each of the electrical operating environment data to obtain multiple electrical operating environment values, wherein the electrical operating environment data includes ambient temperature, ambient humidity, vibration intensity, mechanical stress, corrosion rate, chemical concentration, cable impact force and air pressure;

[0024] performing ratio processing on each of the electrical operating environment values ​​and a preset standard electrical operating environment value to obtain a plurality of second ratios;

[0025] performing average processing on the second ratios corresponding to the respective cable regions to obtain a plurality of second averages;

[0026] performing difference processing on the second ratio of each cable area at the current moment and the corresponding second mean value to obtain a plurality of third difference values;

[0027] The first ratio is multiplied by each of the third differences to obtain a plurality of electrical operating environment indexes.

[0028] Optionally, the step of performing transmission performance evaluation on the electrical transmission performance data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical transmission performance indexes includes:

[0029] Based on preset transmission performance weights, weighted operations are performed on each of the electrical transmission performance data to obtain multiple electrical transmission performance values, wherein the electrical transmission performance data includes power quality parameters, power loss, transmission power factor, actual current carrying capacity and transmission delay;

[0030] performing difference processing on the electrical transmission performance values ​​corresponding to the respective cable regions to obtain a plurality of fourth difference values;

[0031] The first ratio is multiplied by the absolute value of each of the fourth differences respectively to obtain a plurality of electrical transmission performance indexes.

[0032] Optionally, the step of performing safety assessment on each of the cable assessment indexes based on a preset assessment threshold to obtain an assessment result corresponding to each of the cable areas includes:

[0033] Determining whether the cable evaluation index corresponding to each of the cable areas is less than a preset evaluation threshold;

[0034] When the cable evaluation index corresponding to the cable area is less than the evaluation threshold, the operation abnormality is determined as the evaluation result corresponding to the cable area;

[0035] When the cable evaluation index corresponding to the cable area is greater than or equal to the evaluation threshold, normal operation is determined as the evaluation result corresponding to the cable area.

[0036] A second aspect of the present invention provides a cable safety protection system, comprising:

[0037] The inspection module is used for, when receiving monitoring data of multiple cable areas, performing dimensionless processing on each of the monitoring data to obtain multiple target monitoring data;

[0038] An analysis module is used to perform multi-dimensional fusion evaluation on each of the target monitoring data to obtain a cable evaluation index corresponding to each of the cable areas;

[0039] An evaluation module, configured to perform safety evaluation on each of the cable evaluation indexes based on a preset evaluation threshold value, and obtain an evaluation result corresponding to each of the cable areas;

[0040] The fault isolation module is used to perform a fault isolation operation on the cable area when the evaluation result corresponding to the cable area is abnormal operation.

[0041] A third aspect of the present invention provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the cable safety protection method as described in any one of the above items.

[0042] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the cable safety protection method as described in any one of the above items.

[0043] A fifth aspect of the present invention provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer executes the cable safety protection method as described in any one of the above items.

[0044] It can be seen from the above technical solutions that the present invention has the following advantages:

[0045] The present invention performs dimensionless processing on each monitoring data to obtain multiple target monitoring data, performs multi-dimensional fusion evaluation on each target monitoring data, obtains the cable evaluation index corresponding to each cable area, performs safety evaluation on each cable evaluation index based on a preset evaluation threshold, obtains the evaluation result corresponding to each cable area, and when the evaluation result corresponding to the cable area is an abnormal operation, the cable area is subjected to fault isolation operation. This overcomes the technical problem that the existing technology mainly obtains the electrical parameters of the cable in combination with a simple threshold to provide a safety warning for the cable, but this method has a high false alarm rate and is prone to frequent false triggering of the isolating switch on the cable, thereby reducing the reliability of the cable operation. Compared with the traditional cable early warning method, the present invention performs multi-dimensional fusion evaluation on each target monitoring data to obtain the cable evaluation index corresponding to each cable area, thereby comprehensively evaluating the cable safety through multiple cable evaluation indices, and can provide a more accurate safety warning for the cable, thereby improving the reliability of the cable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 A flowchart of the steps of a cable safety protection method provided in the first embodiment of the present invention;

[0048] Figure 2 A flowchart of the steps of a cable safety protection method provided in the second embodiment of the present invention;

[0049] Figure 3 This is a structural block diagram of a cable safety protection system provided in Example 3 of the present invention;

[0050] Figure 4 This is a structural block diagram of a computer device provided in Example 4 of the present invention. DETAILED DESCRIPTION

[0051] An embodiment of the present invention provides a cable safety protection method and system, which is used to solve the technical problem that the existing technology mainly obtains the electrical parameters of the cable and combines simple thresholds to provide safety warnings for the cable, but this method has a high false alarm rate, which easily leads to frequent false triggering of the isolation switch on the cable, thereby reducing the reliability of the cable operation.

[0052] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions 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 embodiments described below 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 work are within the scope of protection of the present invention.

[0053] See also Figure 1 , Figure 1 This is a flowchart of the steps of a cable safety protection method provided in Example 1 of the present invention.

[0054] The present invention provides a cable safety protection method, comprising:

[0055] Step 101: When monitoring data of multiple cable areas are received, dimensionless processing is performed on each monitoring data to obtain multiple target monitoring data.

[0056] Monitoring data refers to the start time, end time, electrical operation performance data set, electrical operation environment data set and electrical transmission performance data set of the cables in the cable area.

[0057] The expression of the electrical operation performance data set is:

[0058] ;

[0059] in, The first electrical operating performance data obtained by the smart sensor, The second electrical operation performance data obtained by the smart sensor, The third electrical operation performance data obtained by the smart sensor is The nth electrical operation performance data obtained by the smart sensor, where n is the number of data points.

[0060] The expression of the electrical operating environment data set is:

[0061] ;

[0062] in, The first electrical operating environment data obtained by the smart sensor, The second electrical operating environment data obtained by the smart sensor, The third electrical operating environment data obtained by the smart sensor is This is the nth electrical operating environment data obtained by the smart sensor.

[0063] The expression of the electrical transmission performance data set is:

[0064] ;

[0065] in, The first electrical transmission performance data obtained for the smart sensor, The nth electrical transmission performance data obtained by the smart sensor.

[0066] Target monitoring data refers to the monitoring data after dimensionless processing.

[0067] In an embodiment of the present invention, when monitoring data of multiple cable areas collected by intelligent sensors are received, each monitoring data is dimensionlessly processed (i.e., the dimension (unit) influence of each monitoring indicator is eliminated through mathematical transformation. This is a conventional data preprocessing process and is not discussed in detail here) to obtain multiple target monitoring data.

[0068] In another embodiment, the cables are divided into multiple cable areas according to the geographical locations where the cables are laid, monitoring data of each cable area is obtained, and each monitoring data is dimensionlessly processed to obtain multiple target monitoring data.

[0069] Step 102: Perform multi-dimensional fusion evaluation on each target monitoring data to obtain a cable evaluation index corresponding to each cable area.

[0070] The cable assessment index refers to the core indicator of cable health status quantified by a multi-dimensional evaluation function.

[0071] In an embodiment of the present invention, target monitoring data associated with each cable area is respectively input into a preset multi-dimensional fusion evaluation function to obtain a cable evaluation index corresponding to each cable area.

[0072] It should be noted that the multidimensional fusion evaluation function is specifically:

[0073] ;

[0074] in, is the cable evaluation index, is the electrical operation performance index, is the electrical operating environment index, is the electrical transmission performance index, is the end time, is the starting time, is the electrical operation performance value at the current moment, is the ith electrical operation performance value, is the electrical operating environment value at the current moment, is the standard electrical operating environment value, is the ith electrical operating environment value, is the electrical transmission performance value at the current moment, is the electrical transmission performance value before the current moment, and i is the index of the data point.

[0075] Step 103: Perform safety assessment on each cable assessment index based on a preset assessment threshold to obtain an assessment result corresponding to each cable area.

[0076] The evaluation threshold refers to the critical value parameter for determining the safety status of the cable.

[0077] In an embodiment of the present invention, when the cable evaluation index corresponding to a cable area is less than a preset evaluation threshold, abnormal operation is determined as the evaluation result corresponding to the cable area. When the cable evaluation index corresponding to the cable area is greater than or equal to the evaluation threshold, normal operation is determined as the evaluation result corresponding to the cable area.

[0078] Step 104: When the evaluation result corresponding to the cable area is abnormal operation, a fault isolation operation is performed on the cable area.

[0079] In an embodiment of the present invention, when the evaluation result corresponding to the cable area is abnormal operation, the circuit breaker and disconnector associated with the cable area are disconnected, the communication port or channel related to the cable area is closed, and the cable area number and evaluation result are sent to the operation and maintenance terminal.

[0080] It should be noted that the numbering of each cable area is: .in, For the first cable area, For the second cable area, For the third cable area, is the nth cable area.

[0081] In an embodiment of the present invention, by performing dimensionless processing on each monitoring data, a plurality of target monitoring data are obtained, and a multi-dimensional fusion evaluation is performed on each target monitoring data respectively to obtain a cable evaluation index corresponding to each cable area. Based on a preset evaluation threshold, a safety evaluation is performed on each cable evaluation index respectively to obtain an evaluation result corresponding to each cable area. When the evaluation result corresponding to the cable area is an abnormal operation, a fault isolation operation is performed on the cable area. This overcomes the technical problem that the prior art mainly obtains the electrical parameters of the cable in combination with a simple threshold to provide a safety warning for the cable, but this method has a high false alarm rate and is prone to frequent false triggering of the isolating switch on the cable, thereby reducing the reliability of the cable operation. Compared with the traditional cable early warning method, the present invention obtains a cable evaluation index corresponding to each cable area by performing a multi-dimensional fusion evaluation on each target monitoring data respectively, thereby comprehensively evaluating the cable safety through multiple cable evaluation indices, and can provide a more accurate safety warning for the cable, thereby improving the reliability of the cable operation.

[0082] See also Figure 2 , Figure 2 This is a flowchart of the steps of a cable safety protection method provided in Example 2 of the present invention.

[0083] The present invention provides a cable safety protection method, comprising:

[0084] Step 201: When monitoring data of multiple cable areas are received, dimensionless processing is performed on each monitoring data to obtain multiple target monitoring data.

[0085] In an embodiment of the present invention, monitoring data of each cable area in the cable is acquired by an intelligent sensor, and dimensionless processing is performed on each monitoring data to obtain a plurality of target monitoring data.

[0086] Step 202: Perform multi-dimensional fusion evaluation on each target monitoring data to obtain a cable evaluation index corresponding to each cable area.

[0087] Furthermore, the target monitoring data includes a start time, an end time, a plurality of electrical operation performance data, a plurality of electrical operation environment data, and a plurality of electrical transmission performance data. Step 202 includes the following sub-steps:

[0088] S11. Perform difference processing on the end time and the start time to obtain a first difference.

[0089] The termination time refers to the moment when the smart sensor stops monitoring data collection.

[0090] The start time refers to the start time when the smart sensor obtains monitoring data.

[0091] In the embodiment of the present invention, the difference between the end time and the start time is calculated to obtain a first difference.

[0092] S12. Ratio processing is performed on the first difference and the termination time to obtain a first ratio.

[0093] In the embodiment of the present invention, the ratio between the first difference and the termination time is calculated to obtain the first ratio.

[0094] S13. Perform performance evaluation on the electrical operation performance data corresponding to each cable area according to the first ratio to obtain multiple electrical operation performance indexes.

[0095] Furthermore, S13 includes the following sub-steps:

[0096] S131. Based on preset operating performance weights, perform weighted operations on each electrical operating performance data to obtain multiple electrical operating performance values, where the electrical operating performance data includes current-related parameters, voltage-related parameters, temperature-related parameters, insulation state parameters, and reactance parameters.

[0097] The operating performance weight refers to the importance of current-related parameters, voltage-related parameters, temperature-related parameters, insulation state parameters and reactance parameters to the cable operating performance.

[0098] Current-related parameters refer to the core current monitoring data for evaluating the electrical performance of cables. Current-related parameters can be instantaneous current value, current harmonic distortion rate, three-phase imbalance, leakage current or transient impact current, etc.

[0099] Voltage-related parameters refer to the core monitoring data used to evaluate the electrical performance of cables. Voltage-related parameters can be the effective value of line voltage, phase voltage imbalance, voltage harmonic distortion rate, transient overvoltage peak or zero-sequence voltage component.

[0100] Temperature-related parameters refer to the core monitoring data used to evaluate the electrical performance of cables. Temperature-related parameters can be conductor temperature, insulation surface temperature, three-phase temperature imbalance or temperature rise rate.

[0101] Insulation status parameters refer to the core monitoring data used to evaluate the electrical performance of cables. Insulation status parameters can be insulation resistance, dielectric loss tangent or partial discharge, etc.

[0102] Reactance parameters refer to the quantitative evaluation of the electromagnetic characteristics of the cable under alternating current, which can be positive-sequence reactance, zero-sequence reactance, capacitive reactance or harmonic reactance.

[0103] The electrical performance value refers to the value used to reflect the electrical performance of the cable.

[0104] In the embodiment of the present application, the current-related parameters, the voltage-related parameters, the temperature-related parameters, the insulation state parameters and the reactance parameters in each electrical operation performance data are respectively subjected to weighted operation based on preset operation performance weights, to obtain a plurality of electrical operation performance values.

[0105] In the embodiment of the present application, the electrical operation performance values corresponding to each cable region are respectively subjected to mean value processing, to obtain a plurality of first means.

[0106] In the embodiment of the present application, the electrical operation performance values associated with each cable region are respectively calculated to obtain the first means corresponding to each cable region.

[0107] In the embodiment of the present application, the electrical operation performance values associated with each cable region are respectively calculated to obtain the first means corresponding to each cable region.

[0108] In the embodiment of the present application, the electrical operation performance values associated with each cable region are respectively calculated to obtain the first means corresponding to each cable region.

[0109] In the embodiment of the present application, the electrical operation performance values associated with each cable region are respectively calculated to obtain the first means corresponding to each cable region.

[0110] In the embodiment of the present application, the electrical operation performance values associated with each cable region are respectively calculated to obtain the first means corresponding to each cable region.

[0111] It should be noted that the electrical operation performance index is used to reflect the power quality and loss of the cable in the cable region.

[0112] In the embodiment of the present application, the electrical operation environment data corresponding to each cable region is respectively subjected to environment evaluation based on the first ratio, to obtain a plurality of electrical operation environment indexes.

[0113] Further, S14 includes the following sub-steps:

[0114] In the embodiment of the present application, the electrical operation environment data is respectively subjected to weighted operation based on preset operation environment weights, to obtain a plurality of electrical operation environment values, wherein the electrical operation environment data includes environmental temperature, environmental humidity, vibration intensity, mechanical stress, corrosion rate, chemical substance concentration, cable impact force and air pressure.

[0115] The operation environment weight refers to the importance of environmental temperature, environmental humidity, vibration intensity, mechanical stress, corrosion rate, chemical substance concentration, cable impact force and air pressure to the electrical operation environment value.

[0116] The electrical operation environment data refers to a set of cable external environment parameters collected by a sensor.

[0117] In an embodiment of the present invention, based on the preset operating environment weights, weighted calculations are performed on the ambient temperature, ambient humidity, vibration intensity, mechanical stress, corrosion rate, chemical concentration, cable impact force and air pressure in each electrical operating environment data to obtain multiple electrical operating environment values.

[0118] S142 , performing ratio processing on each electrical operating environment value and a preset standard electrical operating environment value to obtain a plurality of second ratios.

[0119] The standard electrical operating environment value refers to the electrical operating environment value designed with reference to the cable evaluation criteria.

[0120] In the embodiment of the present invention, the ratios between the respective electrical operating environment values ​​and the preset standard electrical operating environment values ​​are calculated respectively to obtain a plurality of second ratios.

[0121] S143 , performing average processing on the second ratios corresponding to the respective cable areas to obtain multiple second averages.

[0122] In the embodiment of the present invention, the average values ​​of the second ratios corresponding to the respective cable areas are calculated respectively to obtain a plurality of second average values.

[0123] S144 , performing difference processing on the second ratio of each cable area at the current moment and the corresponding second mean value to obtain a plurality of third differences.

[0124] In the embodiment of the present invention, the difference between the second ratio of each cable area at the current moment and the corresponding second mean value is calculated respectively to obtain a plurality of third differences.

[0125] S145 , multiplying the first ratio by each third difference to obtain a plurality of electrical operating environment indexes.

[0126] In the embodiment of the present invention, the multiplication values ​​between the first ratio and each third difference are calculated respectively to obtain a plurality of electrical operating environment indexes.

[0127] It should be noted that the electrical operating environment index can reflect the impact of environmental factors on cables, such as temperature, humidity, corrosion, etc.

[0128] S15. Perform transmission performance evaluation on the electrical transmission performance data corresponding to each cable area according to the first ratio to obtain a plurality of electrical transmission performance indexes.

[0129] Furthermore, S15 includes the following sub-steps:

[0130] S151. Based on preset transmission performance weights, perform weighted operations on each electrical transmission performance data to obtain multiple electrical transmission performance values, where the electrical transmission performance data includes power quality parameters, power loss, transmission power factor, actual current carrying capacity and transmission delay.

[0131] The transmission performance weight refers to the importance of power quality parameters, power loss, transmission power factor, actual current carrying capacity and transmission delay to the electrical transmission performance value.

[0132] Power quality parameters refer to the voltage harmonic distortion rate and current harmonic distortion rate of the cable, which are used to measure the degree of harmonic pollution in the power grid and prevent harmonics from causing cable overheating.

[0133] Power loss refers to the active and reactive losses per unit length, and is used to identify abnormal hot spots or insulation defects.

[0134] The transmission power factor refers to the ratio of active power to apparent power and is used to determine the efficiency of cable loads. Low power factors require compensation.

[0135] Actual current carrying capacity refers to the ratio of the real-time current value to the rated current carrying capacity, which is used to prevent insulation thermal breakdown caused by overload.

[0136] Transmission delay refers to the signal propagation delay (μs / km) and phase difference, which is used to detect local cable parameter anomalies.

[0137] In an embodiment of the present invention, according to preset transmission performance weights, weighted operations are performed on the power quality parameters, power loss, transmission power factor, actual current carrying capacity and transmission delay in each electrical transmission performance data to obtain multiple electrical transmission performance values.

[0138] S152: Perform difference processing on the electrical transmission performance values ​​corresponding to the respective cable areas to obtain a plurality of fourth differences.

[0139] In the embodiment of the present invention, the differences between the two electrical transmission performance values ​​associated with the cable regions are calculated respectively to obtain a plurality of fourth differences.

[0140] S153 , multiplying the first ratio by the absolute value of each fourth difference respectively to obtain a plurality of electrical transmission performance indexes.

[0141] In the embodiment of the present invention, the multiplication values ​​between the first ratio and the absolute values ​​of the fourth differences are calculated respectively to obtain a plurality of electrical transmission performance indexes.

[0142] It should be noted that the electrical transmission performance index is used to monitor the efficiency and stability of cable power transmission.

[0143] S16. Input the electrical operation performance index, electrical operation environment index, and electrical transmission performance index corresponding to each cable area into a preset comprehensive evaluation function to obtain a cable evaluation index corresponding to each cable area.

[0144] In an embodiment of the present invention, based on a preset comprehensive evaluation function, the cable evaluation index corresponding to each cable area is determined according to the electrical operation performance index, electrical operation environment index and electrical transmission performance index corresponding to each cable area.

[0145] It should be noted that the comprehensive evaluation function is specifically:

[0146]

[0147] Step 203: Determine whether the cable evaluation index corresponding to each cable area is less than a preset evaluation threshold.

[0148] In the embodiment of the present invention, it is determined whether the cable evaluation index corresponding to each cable area is less than a preset evaluation threshold.

[0149] Step 204: When the cable evaluation index corresponding to the cable area is less than the evaluation threshold, the operation abnormality is determined as the evaluation result corresponding to the cable area.

[0150] In an embodiment of the present invention, when the cable evaluation index corresponding to the cable area is less than the evaluation threshold, it indicates that there is a safety hazard in the cable area, and the operation abnormality is determined as the evaluation result corresponding to the cable area.

[0151] Step 205: When the cable evaluation index corresponding to the cable area is greater than or equal to the evaluation threshold, normal operation is determined as the evaluation result corresponding to the cable area.

[0152] In an embodiment of the present invention, when the cable evaluation index corresponding to the cable area is greater than or equal to the evaluation threshold, it indicates that there is no safety hazard in the cable area, and normal operation is determined as the evaluation result corresponding to the cable area.

[0153] Step 206: When the evaluation result corresponding to the cable area is abnormal operation, a fault isolation operation is performed on the cable area.

[0154] In this embodiment of the present invention, when a cable zone is assessed to be operating abnormally, the circuit breaker and disconnector in the cable zone are opened, and the communication port or channel associated with the cable zone is closed. Simultaneously, the cable zone number and cable assessment index are sent to a backend terminal.

[0155] In an embodiment of the present invention, by performing dimensionless processing on each monitoring data, a plurality of target monitoring data are obtained, and a multi-dimensional fusion evaluation is performed on each target monitoring data respectively to obtain a cable evaluation index corresponding to each cable area. Based on a preset evaluation threshold, a safety evaluation is performed on each cable evaluation index respectively to obtain an evaluation result corresponding to each cable area. When the evaluation result corresponding to the cable area is an abnormal operation, a fault isolation operation is performed on the cable area. This overcomes the technical problem that the prior art mainly obtains the electrical parameters of the cable in combination with a simple threshold to provide a safety warning for the cable, but this method has a high false alarm rate and is prone to frequent false triggering of the isolating switch on the cable, thereby reducing the reliability of the cable operation. Compared with the traditional cable early warning method, the present invention obtains a cable evaluation index corresponding to each cable area by performing a multi-dimensional fusion evaluation on each target monitoring data respectively, thereby comprehensively evaluating the cable safety through multiple cable evaluation indices, and can provide a more accurate safety warning for the cable, thereby improving the reliability of the cable operation.

[0156] See also Figure 3 , Figure 3 This is a structural block diagram of a cable safety protection system provided in Example 3 of the present invention.

[0157] The present invention provides a cable safety protection system, comprising:

[0158] Inspection module 301 is used for performing dimensionless processing on each monitoring data when receiving monitoring data of multiple cable areas to obtain multiple target monitoring data;

[0159] The analysis module 302 is used to perform multi-dimensional fusion evaluation on each target monitoring data to obtain the cable evaluation index corresponding to each cable area;

[0160] An evaluation module 303 is configured to perform safety evaluation on each cable evaluation index based on a preset evaluation threshold value to obtain an evaluation result corresponding to each cable area;

[0161] The fault isolation module 304 is configured to perform a fault isolation operation on the cable area when the evaluation result corresponding to the cable area is abnormal operation.

[0162] Furthermore, the target monitoring data includes a start time, an end time, a plurality of electrical operation performance data, a plurality of electrical operation environment data, and a plurality of electrical transmission performance data. The analysis module 302 includes:

[0163] A first analysis submodule is configured to perform difference processing on the end time and the start time to obtain a first difference;

[0164] Performing a ratio processing on the first difference and the termination time to obtain a first ratio;

[0165] A second analysis submodule is configured to perform performance evaluation on the electrical operation performance data corresponding to each cable area according to the first ratio to obtain a plurality of electrical operation performance indexes;

[0166] A third analysis submodule is configured to perform an environmental assessment on the electrical operating environment data corresponding to each cable area according to the first ratio to obtain a plurality of electrical operating environment indexes;

[0167] a fourth analysis submodule, configured to perform transmission performance evaluation on the electrical transmission performance data corresponding to each cable area according to the first ratio, to obtain a plurality of electrical transmission performance indexes;

[0168] The fifth analysis submodule is used to input the electrical operation performance index, electrical operation environment index and electrical transmission performance index corresponding to each cable area into a preset comprehensive evaluation function to obtain the cable evaluation index corresponding to each cable area.

[0169] Furthermore, the second analysis submodule includes:

[0170] a first weighting unit, configured to perform weighted operations on each electrical operation performance data based on a preset operation performance weight to obtain a plurality of electrical operation performance values, wherein the electrical operation performance data includes current-related parameters, voltage-related parameters, temperature-related parameters, insulation state parameters, and reactance parameters;

[0171] A first analysis unit is configured to perform average processing on the electrical operation performance values ​​corresponding to each cable area to obtain a plurality of first average values;

[0172] Performing difference processing on the electrical operating performance value of each cable area at the current moment and the corresponding first mean value to obtain multiple second difference values;

[0173] The first ratio is multiplied by each second difference to obtain a plurality of electrical operation performance indexes.

[0174] Furthermore, the third analysis submodule includes:

[0175] a second weighting unit, configured to perform weighted operations on each electrical operating environment data based on a preset operating environment weight to obtain a plurality of electrical operating environment values, wherein the electrical operating environment data includes ambient temperature, ambient humidity, vibration intensity, mechanical stress, corrosion rate, chemical concentration, cable impact force, and air pressure;

[0176] a second analyzing unit, configured to perform ratio processing on each electrical operating environment value and a preset standard electrical operating environment value to obtain a plurality of second ratios;

[0177] respectively, the second ratio corresponding to each cable region is subjected to mean value processing to obtain a plurality of second mean values;

[0178] respectively, the second ratio corresponding to each cable region is subjected to mean value processing to obtain a plurality of second mean values;

[0179] respectively, the second ratio corresponding to each cable region is subjected to mean value processing to obtain a plurality of second mean values.

[0180] Further, the fourth analysis submodule comprises:

[0181] The third weighting unit is configured to perform weighted operation on each electrical transmission performance data based on a preset transmission performance weight to obtain a plurality of electrical transmission performance values, wherein the electrical transmission performance data comprises power quality parameters, power loss, transmission power factor, actual carrying capacity and transmission delay.

[0182] The third analysis unit is configured to perform difference value processing on the electrical transmission performance value corresponding to each cable region to obtain a plurality of fourth difference values.

[0183] respectively, the second ratio corresponding to each cable region is subjected to mean value processing to obtain a plurality of second mean values.

[0184] Further, the evaluation module 303 comprises:

[0185] The first evaluation submodule is configured to determine whether the cable evaluation index corresponding to each cable region is less than a preset evaluation threshold value.

[0186] The second evaluation submodule is configured to determine that the running abnormality is the evaluation result corresponding to the cable region when the cable evaluation index corresponding to the cable region is less than the evaluation threshold value.

[0187] The third evaluation submodule is configured to determine that the running normality is the evaluation result corresponding to the cable region when the cable evaluation index corresponding to the cable region is greater than or equal to the evaluation threshold value.

[0188] Please refer to Figure 4 , Figure 4 The structural block diagram of a computer device provided for the fourth embodiment of the present application.

[0189] The electronic device of the embodiment of the present application comprises a memory 401 and a processor 402, the memory 401 stores a computer program; when the computer program is executed by the processor 402, the processor 402 executes the safety protection method of the cable according to any one of the above embodiments.

[0190] The memory 401 can be an electronic memory such as a flash memory, an EEPROM (Electrically Erasable Programmable Read-Only Memory), an EPROM, a hard disk or a ROM. The memory 401 has a storage space 403 for program codes 413 for performing any of the method steps in the above described methods. For example, the storage space 403 for program codes can comprise individual program codes 413 for implementing the various steps in the above described methods, respectively. These program codes can be read from or written to one or more computer program products. These computer program products include program code carriers such as a hard disk, a compact disk (CD), a memory card or a floppy disk. The program codes can be compressed, for example, in a suitable form. These codes, when run by a computing processing device, cause the computing processing device to perform the individual steps in the above described methods. These program codes can be read from or written to one or more computer program products. These computer program products include program code carriers such as a hard disk, a compact disk (CD), a memory card or a floppy disk. The program codes can be compressed, for example, in a suitable form. These codes, when run by a computing processing device, cause the computing processing device to perform the individual steps in the above described methods of securing a cable.

[0191] The embodiment five of the present application further provides a computer readable storage medium, having stored thereon a computer program, which, when executed by a processor, implements the method of securing a cable according to any of the above described embodiments.

[0192] The embodiment six of the present application further provides a computer program product, comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the method of securing a cable according to any of the above described embodiments.

[0193] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above described system, device and unit can refer to the corresponding processes in the above described method embodiments, which will not be described here.

[0194] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0195] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0196] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0197] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present invention. The aforementioned storage medium includes various media that can store program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0198] 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 they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A cable safety protection method, characterized in that: include: When monitoring data of multiple cable areas are received, dimensionless processing is performed on each of the monitoring data to obtain multiple target monitoring data; Performing multi-dimensional fusion evaluation on each of the target monitoring data to obtain a cable evaluation index corresponding to each of the cable areas; Performing safety assessments on each of the cable assessment indexes based on a preset assessment threshold to obtain assessment results corresponding to each of the cable areas; When the evaluation result corresponding to the cable area is abnormal operation, a fault isolation operation is performed on the cable area.

2. The cable safety protection method according to claim 1, characterized in that: The target monitoring data includes a start time, an end time, a plurality of electrical operation performance data, a plurality of electrical operation environment data, and a plurality of electrical transmission performance data. The step of performing multi-dimensional fusion evaluation on each of the target monitoring data to obtain a cable evaluation index corresponding to each of the cable areas includes: Performing a difference process on the end time and the start time to obtain a first difference; Performing a ratio processing on the first difference and the termination time to obtain a first ratio; Performing performance evaluation on the electrical operation performance data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical operation performance indexes; Performing environmental assessment on the electrical operating environment data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical operating environment indexes; Performing transmission performance evaluation on the electrical transmission performance data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical transmission performance indexes; The electrical operation performance index, electrical operation environment index and electrical transmission performance index corresponding to each of the cable areas are respectively input into a preset comprehensive evaluation function to obtain a cable evaluation index corresponding to each of the cable areas.

3. The cable safety protection method according to claim 2, characterized in that: The step of performing performance evaluation on the electrical operation performance data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical operation performance indexes includes: Based on preset operating performance weights, weighted operations are performed on each of the electrical operating performance data to obtain multiple electrical operating performance values, wherein the electrical operating performance data includes current-related parameters, voltage-related parameters, temperature-related parameters, insulation state parameters, and reactance parameters; performing average processing on the electrical operation performance values ​​corresponding to the respective cable areas to obtain a plurality of first average values; Performing difference processing on the electrical operating performance value of each cable area at the current moment and the corresponding first mean value to obtain a plurality of second difference values; The first ratio is multiplied by each of the second differences to obtain a plurality of electrical operation performance indexes.

4. The cable safety protection method according to claim 2, characterized in that: The step of performing environmental assessment on the electrical operating environment data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical operating environment indexes includes: Based on preset operating environment weights, weighted operations are performed on each of the electrical operating environment data to obtain multiple electrical operating environment values, wherein the electrical operating environment data includes ambient temperature, ambient humidity, vibration intensity, mechanical stress, corrosion rate, chemical concentration, cable impact force and air pressure; performing ratio processing on each of the electrical operating environment values ​​and a preset standard electrical operating environment value to obtain a plurality of second ratios; performing average processing on the second ratios corresponding to the respective cable regions to obtain a plurality of second averages; performing difference processing on the second ratio of each cable area at the current moment and the corresponding second mean value to obtain a plurality of third difference values; The first ratio is multiplied by each of the third differences to obtain a plurality of electrical operating environment indexes.

5. The cable safety protection method according to claim 2, characterized in that: The step of performing transmission performance evaluation on the electrical transmission performance data corresponding to each of the cable areas according to the first ratio to obtain a plurality of electrical transmission performance indexes includes: Based on preset transmission performance weights, weighted operations are performed on each of the electrical transmission performance data to obtain multiple electrical transmission performance values, wherein the electrical transmission performance data includes power quality parameters, power loss, transmission power factor, actual current carrying capacity and transmission delay; performing difference processing on the electrical transmission performance values ​​corresponding to the respective cable regions to obtain a plurality of fourth difference values; The first ratio is multiplied by the absolute value of each of the fourth differences respectively to obtain a plurality of electrical transmission performance indexes.

6. The cable safety protection method according to claim 1, characterized in that: The step of performing safety assessment on each of the cable assessment indexes based on a preset assessment threshold to obtain an assessment result corresponding to each of the cable areas includes: Determining whether the cable evaluation index corresponding to each of the cable areas is less than a preset evaluation threshold; When the cable evaluation index corresponding to the cable area is less than the evaluation threshold, the operation abnormality is determined as the evaluation result corresponding to the cable area; When the cable evaluation index corresponding to the cable area is greater than or equal to the evaluation threshold, normal operation is determined as the evaluation result corresponding to the cable area.

7. A cable safety protection system, characterized in that: include: The inspection module is used for, when receiving monitoring data of multiple cable areas, performing dimensionless processing on each of the monitoring data to obtain multiple target monitoring data; An analysis module is used to perform multi-dimensional fusion evaluation on each of the target monitoring data to obtain a cable evaluation index corresponding to each of the cable areas; An evaluation module, configured to perform safety evaluation on each of the cable evaluation indexes based on a preset evaluation threshold value, and obtain an evaluation result corresponding to each of the cable areas; The fault isolation module is used to perform a fault isolation operation on the cable area when the evaluation result corresponding to the cable area is abnormal operation.

8. An electronic device, characterized in that: The method comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the cable safety protection method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the cable safety protection method according to any one of claims 1 to 6 is implemented.

10. A computer program product, characterized in that The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, wherein the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer is caused to execute the cable safety protection method according to any one of claims 1 to 6.

Images