High-voltage cable operation parameter on-line monitoring alarm system

Abstract

The invention relates to the technical field of cable operation monitoring, in particular to a high-voltage cable operation parameter on-line monitoring alarm system, which comprises a cable parameter acquisition module used for acquiring cable distribution parameters and cable operation parameters of a high-voltage cable; the spatial distribution consistency analysis module is used for analyzing the spatial distribution consistency of the cables in the cable tunnel according to the cable distribution parameters; the sheath loop connectivity analysis module is used for analyzing the sheath loop connectivity of the cable according to the cable sheath loop current; the cable distribution correlation degree analysis module is used for analyzing the cable distribution correlation degree according to the spatial distribution consistency and the sheath loop connectivity; and the cable fault alarm module is used for analyzing the cable operation state by combining the cable operation parameters with the cable distribution correlation degree and carrying out cable fault alarm. According to the invention, by analyzing the spatial distribution consistency of the cable in the cable tunnel and the connectivity of the sheath loop, the accuracy and reliability of cable fault positioning are improved.

Description

Technical Field

[0001] The present application relates to the technical field of cable operation monitoring, and in particular to an online monitoring and alarm system for high-voltage cable operation parameters. Background Art

[0002] High-voltage cables play an indispensable role in the power supply and distribution system. Any failure of high-voltage cables may cause power failure or equipment damage, thus causing major interference to the entire power network. In order to alleviate the current situation where the demand for power transmission is growing rapidly but the construction of new power transmission corridors is becoming increasingly difficult, the clustered laying method is becoming more and more widely used in new cable lines.

[0003] With the continuous evolution of sensor technology, the fault detection and monitoring system of high-voltage cables is gradually moving towards a new stage of intelligence and automation. With the help of sensors to obtain the operating parameters of high-voltage cables, it is possible to continuously monitor and record the operating status and various performance indicators of the cables, and then perform fault identification and location according to predetermined judgment criteria.

[0004] The existing online monitoring and alarm system for high-voltage cable operating parameters mainly relies on the sensor data of a single cable for fault monitoring and fault location. When the sensor fails due to the influence of the fault, the cable operating parameters will be missing or distorted. There are electromagnetic coupling effects and thermal conduction effects between adjacent cables in a clustered laying environment of high-voltage cables. Therefore, the operating status of adjacent cables has a certain correlation. The existing system fails to effectively utilize this feature for fault diagnosis and location. When faced with abnormal operating parameters caused by sensor failure, there is a problem of insufficient cable fault location accuracy. Summary of the invention

[0005] In order to overcome the defects and shortcomings of the prior art, the present application provides an online monitoring and alarm system for high-voltage cable operating parameters, which improves the accuracy and reliability of cable fault locating by analyzing the spatial distribution consistency of the cable in the cable tunnel and the connectivity of the sheath loop.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions: In a first aspect, the present application provides an online monitoring and alarm system for high-voltage cable operation parameters, including a cable parameter acquisition module, a spatial distribution consistency analysis module, a sheath loop connectivity analysis module, a cable distribution correlation analysis module, and a cable fault alarm module; The cable parameter acquisition module is used to acquire the cable distribution parameters and cable operation parameters of the high-voltage cable, and the cable operation parameters include the cable surface temperature, the cable load current and the cable sheath circulation current; The spatial distribution consistency analysis module is used to analyze the spatial distribution consistency of the cables in the cable tunnel according to the cable distribution parameters; The sheath loop connectivity analysis module is used to analyze the sheath loop connectivity of the cable according to the cable sheath circulation; The cable distribution correlation analysis module is used to analyze the cable distribution correlation degree according to the spatial distribution consistency and sheath loop connectivity; The cable fault alarm module is used to analyze the cable operation status and issue a cable fault alarm by combining the cable operation parameters with the cable distribution correlation degree.

[0007] Optionally, the spatial distribution consistency analysis module is used to analyze the spatial distribution consistency of the cables in the cable tunnel according to the cable distribution parameters, and the specific analysis steps include: Obtaining cable distribution parameters, which include cable laying paths and cable path lengths; The cable co-linear length is obtained by analyzing the cable laying paths of the two cables, and the cable co-linear length is the overlapping length of the cable laying paths of the two cables; The ratio of the colinear length of the two cables to the minimum cable path length of the two cables is taken as the spatial distribution consistency index of the cables. The spatial distribution consistency index is used to quantify the spatial distribution consistency of the two cables in the cable tunnel.

[0008] Optionally, the sheath loop connectivity analysis module is used to analyze the sheath loop connectivity of the cable according to the cable sheath circulation current, and the specific analysis steps include: Obtain the cable sheath circulating current and sort the cable sheath circulating current according to the acquisition time to obtain the cable sheath circulating current time series; The standard deviation of the cable sheath circulating current in the monitoring period and the sheath circulating current covariance of the two cables in the same monitoring period are calculated through the cable sheath circulating current time series; The product of the standard deviations of the sheath circulating currents of the two cables in the same monitoring period is taken as the normalization factor; The ratio of the sheath circulating current covariance to the normalization factor is taken as the sheath loop connectivity index of the cable. The sheath loop connectivity index is used to quantify the sheath loop connectivity of two cables.

[0009] Optionally, the cable distribution correlation analysis module is used to analyze the cable distribution correlation degree according to the spatial distribution consistency and the sheath loop connectivity, and the specific analysis steps include: Obtain the spatial distribution consistency index and sheath loop connectivity index of the cable; The cable distribution correlation index is obtained by weighted summing the spatial distribution consistency index and the sheath loop connectivity index. The cable distribution correlation index is used to quantify the distribution correlation degree of two cables.

[0010] Optionally, the cable fault alarm module is used to analyze the cable operation status and perform a cable fault alarm by combining the cable operation parameters with the cable distribution correlation degree, and the specific analysis steps include: Obtain cable operation parameters and cable distribution correlation index; The cables whose cable distribution correlation index is greater than a preset cable distribution correlation threshold are regarded as adjacent cables; The consistency of the operating parameter fluctuations of adjacent cables is analyzed by dynamic time warping algorithm, and the consistency index of the operating parameter fluctuations is obtained. When the cable operating parameters exceed the preset operating range, a cable fault alarm is issued and the fault is located in combination with the consistency of the operating parameter fluctuations of adjacent cables.

[0011] Optionally, the fault location is performed in combination with the consistency of fluctuations of operating parameters of adjacent cables, including: When the cable operating parameters of the faulty cable are not missing, the cable operating parameters of the faulty cable are used to locate the fault; When the cable operating parameters of the faulty cable are missing, the cable operating parameters of the faulty cable are interpolated and repaired according to the consistency of the operating parameter fluctuations of the adjacent cables, and the interpolated and repaired cable operating parameters are used to locate the fault.

[0012] Optionally, the interpolating and repairing the cable operating parameters of the faulty cable includes: When the operating parameter fluctuation consistency index is greater than a preset operating parameter fluctuation consistency threshold, extracting the missing time of the cable operating parameters of the faulty cable; The weighted mean of the cable operation parameter change rates corresponding to the adjacent cables at the same missing moment is taken as the cable operation parameter change coefficient, and the weighted weight of the cable operation parameter change rate is the ratio of the cable distribution correlation index of the adjacent cables to the mean of the cable distribution correlation index; The missing value of the faulty cable is calculated by the cable operation parameter variation coefficient and interpolated and repaired. The missing value is the product of the cable operation parameter of the faulty cable closest to the missing time and the corresponding cable operation parameter variation coefficient; When the operating parameter fluctuation consistency index is less than or equal to the preset operating parameter fluctuation consistency threshold, the cable operating parameters of the faulty cable are interpolated and repaired by the moving average method, and the mean values ​​of the operating parameters of the cable operating parameters of the faulty cable at adjacent time points are used as missing values ​​for interpolation and repair.

[0013] In a second aspect, the present application provides a method for online monitoring and alarming of high-voltage cable operating parameters, comprising: Obtain cable distribution parameters and cable operating parameters of high-voltage cables, where the cable operating parameters include cable surface temperature, cable load current and cable sheath circulating current; Analyze the spatial distribution consistency of cables in the cable tunnel based on cable distribution parameters; Analyze the cable sheath loop connectivity based on the cable sheath circulation current; Analyze the degree of cable distribution correlation based on spatial distribution consistency and sheath loop connectivity; The cable operation parameters are combined with the cable distribution correlation degree to analyze the cable operation status and issue a cable fault alarm.

[0014] In a third aspect, the present application provides an electronic device comprising: a processor and a memory, wherein the memory stores a computer program that can be called by the processor, and the processor executes an online monitoring and alarm method for high-voltage cable operating parameters by calling the computer program stored in the memory.

[0015] In a fourth aspect, the present application provides a computer-readable storage medium storing instructions, which, when executed on a computer, enable the computer to execute an online monitoring and alarm method for high-voltage cable operating parameters.

[0016] Compared with the prior art, this application has the following advantages and beneficial effects: The present application analyzes the spatial distribution consistency of cables in the tunnel through cable distribution parameters, quantifies the physical position correlation of the two cables, analyzes the sheath loop connectivity of the cables through the cable sheath circulation, quantifies the degree of coordinated change of the sheath circulation of the two cables, and then analyzes the cable distribution correlation degree based on the spatial distribution consistency and sheath loop connectivity. The cable operation parameters are combined with the cable distribution correlation degree to analyze the cable operation status and perform cable fault alarm and fault location, effectively improving the accuracy and reliability of cable fault location. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a structural diagram of an online monitoring and alarm system for high-voltage cable operating parameters provided in an embodiment of the present application; Figure 2 It is a schematic diagram of the overall process of a method for online monitoring and alarming of high-voltage cable operating parameters provided in an embodiment of the present application; Figure 3 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0018] The technical solution of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations on the technical solution of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0019] See also Figure 1 , Figure 1 : is a structural diagram of a high-voltage cable operating parameter online monitoring alarm system provided in an embodiment of the present application. This embodiment provides a high-voltage cable operating parameter online monitoring alarm system, including: The cable parameter acquisition module 110 is used to acquire the cable distribution parameters and cable operation parameters of the high-voltage cable, where the cable operation parameters include the cable surface temperature, the cable load current and the cable sheath circulating current; A spatial distribution consistency analysis module 120, used to analyze the spatial distribution consistency of the cables in the cable tunnel according to the cable distribution parameters; A sheath loop connectivity analysis module 130, for analyzing the sheath loop connectivity of the cable according to the cable sheath circulation; The cable distribution correlation analysis module 140 is used to analyze the cable distribution correlation degree according to the spatial distribution consistency and the sheath loop connectivity; The cable fault alarm module 150 is used to analyze the cable operation status and issue a cable fault alarm by combining the cable operation parameters with the cable distribution correlation degree.

[0020] In the embodiment of the present application, the spatial distribution consistency analysis module 120 is used to analyze the spatial distribution consistency of the cable in the cable tunnel according to the cable distribution parameters. In the cable cluster laying environment, the spatial distribution of the cable will affect its electromagnetic coupling, thermal conduction and mechanical stability, thereby affecting its operating state and fault propagation characteristics. By analyzing the spatial distribution consistency of the cable in the cable tunnel, the physical position correlation of the two cables can be quantified, providing a basis for further analyzing the distribution correlation degree of the cables. The cable spatial distribution consistency index can reflect the overlap degree of the two cables on the laying path. The higher the overlap degree, the greater the possibility that the two cables are affected by the same environmental factors, and the changes in their operating parameters have a stronger correlation. In fault analysis, if the sensor of the faulty cable fails, the fluctuation law of the operating parameters of the adjacent cables with high consistency in spatial distribution can be used, combined with the cable distribution correlation degree, to assist in determining the specific location of the fault, improve the accuracy and reliability of the fault alarm, and thus enhance the adaptability of the monitoring system in a complex laying environment. The specific steps of analyzing the spatial distribution consistency of the cable in the cable tunnel include: Obtaining cable distribution parameters, which include cable laying paths and cable path lengths; The cable co-linear length is obtained by analyzing the cable laying paths of the two cables, and the cable co-linear length is the overlapping length of the cable laying paths of the two cables; The ratio of the co-linear length of the two cables to the minimum cable path length of the two cables is used as the cable spatial distribution consistency index. The spatial distribution consistency index is used to quantify the spatial distribution consistency of the two cables in the cable tunnel. The calculation formula of the spatial distribution consistency index can be: ; In the formula Indicates cable With cable The cable co-linear length, Indicates cable The cable path length, Indicates cable The cable path length, express and The minimum value in Indicates cable With cable The spatial distribution consistency index.

[0021] In the embodiment of the present application, the sheath loop connectivity analysis module 130 is used to analyze the sheath loop connectivity of the cable according to the cable sheath circulation. The sheath loop connectivity can reflect the degree of coordinated change of the sheath circulation of the two cables. The higher the sheath loop connectivity, the more likely it is that the two cables share a similar grounding system or have a strong electromagnetic coupling, so that the changes in their operating parameters have stronger synchronization. In fault analysis, if the monitoring data of the faulty cable is missing or distorted, the operating parameters of the adjacent cables with higher sheath loop connectivity can be used as a reference, combined with the spatial distribution consistency and overall distribution correlation of the cable, to perform auxiliary fault location, thereby improving the accuracy and robustness of fault location. The specific steps of analyzing the sheath loop connectivity of the cable include: Obtain the cable sheath circulating current and sort the cable sheath circulating current according to the acquisition time to obtain the cable sheath circulating current time series; The standard deviation of the cable sheath circulating current in the monitoring period and the sheath circulating current covariance of the two cables in the same monitoring period are calculated through the cable sheath circulating current time series; The product of the standard deviations of the sheath circulating currents of the two cables in the same monitoring period is taken as the normalization factor; The ratio of the sheath circulation covariance to the normalization factor is used as the sheath loop connectivity index of the cable. The sheath loop connectivity index is used to quantify the sheath loop connectivity of the two cables. The calculation formula of the sheath loop connectivity index can be: ; In the formula Indicates cable The time series of sheath circulation during the monitoring period is: Indicates cable The time series of sheath circulation during the monitoring period is: Indicates cable With cable The sheath circulation covariance within the same monitoring period is used to measure whether the change trends of the sheath circulation of two cables are consistent. Indicates cable The standard deviation of the sheath circulation during the monitoring period is: Indicates cable The standard deviation of the sheath circulation during the monitoring period is used to measure the dispersion of the sheath circulation. Indicates cable With cable The sheath loop connectivity index.

[0022] In the embodiment of the present application, the cable distribution correlation analysis module 140 is used to analyze the cable distribution correlation degree according to the spatial distribution consistency and the sheath loop connectivity. In the cable cluster laying environment, the physical spatial distribution relationship and electrical connectivity between the cables will affect the mutual correlation degree of their operating states. By analyzing the spatial distribution consistency and sheath loop connectivity of the cables and calculating the cable distribution correlation index, the correlation degree of the two cables at the physical and electrical levels can be fully quantified, providing a reliable reference basis for fault diagnosis. The higher the cable distribution correlation index, the greater the mutual influence of the two cables in terms of laying position, thermal environment, electromagnetic coupling and sheath circulation, and the changes in their operating parameters may have a high consistency. The specific steps of analyzing the cable distribution correlation degree include: Obtain the spatial distribution consistency index and sheath loop connectivity index of the cable; The cable distribution correlation index is obtained by weighted summing the spatial distribution consistency index and the sheath loop connectivity index. The cable distribution correlation index is used to quantify the distribution correlation degree of two cables.

[0023] In the embodiment of the present application, the cable fault alarm module 150 is used to analyze the cable operation status and perform cable fault alarm by combining the cable operation parameters with the cable distribution correlation degree, and screen the adjacent cables by using the cable distribution correlation index to ensure that the selected cables are correlated in terms of spatial layout and electrical connectivity, and then use the dynamic time warping algorithm to analyze the consistency of the fluctuation of the operation parameters of the adjacent cables to improve the ability to identify the fault propagation mode. When the cable operation parameters exceed the preset range, the system triggers the fault alarm and locates the fault in combination with the data of the adjacent cables. In particular, when the data of the faulty cable is missing, interpolation repair is performed through the parameter change trend of the adjacent cables to ensure the continuity and reliability of the fault diagnosis. The specific steps of analyzing the cable operation status and performing the cable fault alarm include: Obtain cable operation parameters and cable distribution correlation index; The cables whose cable distribution correlation index is greater than a preset cable distribution correlation threshold are regarded as adjacent cables; The consistency of the fluctuation of the operating parameters of the adjacent cables is analyzed by the dynamic time warping algorithm to obtain the consistency index of the fluctuation of the operating parameters. The dynamic time warping (DTW) algorithm is an algorithm used to calculate the similarity of two time series. It can handle the situation of time axis stretching or contraction and is widely used in pattern recognition and signal processing. In high-voltage cable fault location, DTW can be used to analyze the consistency of the fluctuation of the operating parameters of the adjacent cables, that is, when the fault occurs, whether the cable operating parameters of the adjacent cables, such as the cable surface temperature, cable load current, cable sheath circulating current, and cable grounding current, show synchronous change characteristics; When the cable operating parameters exceed the preset operating range, a cable fault alarm is issued and the fault is located in combination with the consistency of the operating parameter fluctuations of adjacent cables; The specific steps of fault location based on the consistency of the operating parameter fluctuations of adjacent cables include: When the cable operating parameters of the faulty cable are not missing, the cable operating parameters of the faulty cable are used to locate the fault, wherein the fault location method includes temperature anomaly analysis method, current mutation detection method, sheath circulation anomaly analysis method and fault diagnosis method based on artificial intelligence and machine learning, which locates the cable fault point by analyzing the changes of operating parameters such as cable surface temperature, cable load current and cable sheath circulation current, combined with signal propagation time, reflection characteristics or pattern recognition technology; When the cable operating parameters of the faulty cable are missing, the cable operating parameters of the faulty cable are interpolated and repaired according to the consistency of the fluctuation of the operating parameters of the adjacent cables, and the interpolated and repaired cable operating parameters are used to locate the fault; The specific steps of interpolating and repairing the cable operating parameters of the faulty cable include: When the operating parameter fluctuation consistency index is greater than a preset operating parameter fluctuation consistency threshold, extracting the missing time of the cable operating parameters of the faulty cable; The weighted mean of the cable operation parameter change rates corresponding to the adjacent cables at the same missing moment is taken as the cable operation parameter change coefficient, and the weighted weight of the cable operation parameter change rate is the ratio of the cable distribution correlation index of the adjacent cables to the mean of the cable distribution correlation index; The missing value of the faulty cable is calculated by the cable operation parameter variation coefficient and interpolated and repaired. The missing value is the product of the cable operation parameter of the faulty cable closest to the missing time and the corresponding cable operation parameter variation coefficient; When the operating parameter fluctuation consistency index is less than or equal to the preset operating parameter fluctuation consistency threshold, the cable operating parameters of the faulty cable are interpolated and repaired by the moving average method, and the mean values ​​of the operating parameters of the cable operating parameters of the faulty cable at adjacent time points are used as missing values ​​for interpolation and repair.

[0024] It should be noted that the weighted weight values ​​when weighted summing the set parameters such as the spatial distribution consistency index and the sheath loop connectivity index, the preset cable distribution association threshold and the preset operating parameter fluctuation consistency threshold in the embodiment of the present application are obtained as follows: a data set is constructed by obtaining the cable distribution parameters and cable operating parameters of the high-voltage cable, and the cable distribution association index and the operating parameter fluctuation consistency index are substituted into the calculation, and at the same time, the judgment results of the experts on the cable distribution correlation and the operating parameter fluctuation consistency are obtained, the cable distribution association index, the operating parameter fluctuation consistency index and the judgment results are imported into the fitting software, and the weighted weight values, the preset cable distribution association threshold and the preset operating parameter fluctuation consistency threshold that meet the maximum judgment accuracy are output.

[0025] See also Figure 2 , Figure 2 This is a schematic diagram of the overall process of a method for online monitoring and alarming of high-voltage cable operating parameters provided in an embodiment of the present application, which specifically includes the following steps: S210: Obtain cable distribution parameters and cable operation parameters of the high-voltage cable, where the cable operation parameters include cable surface temperature, cable load current, and cable sheath circulating current.

[0026] S220: analyzing the spatial distribution consistency of the cables in the cable tunnel according to the cable distribution parameters; The specific steps to analyze the consistency of the spatial distribution of cables in the cable tunnel include: Obtaining cable distribution parameters, which include cable laying paths and cable path lengths; The cable co-linear length is obtained by analyzing the cable laying paths of the two cables, and the cable co-linear length is the overlapping length of the cable laying paths of the two cables; The ratio of the colinear length of the two cables to the minimum cable path length of the two cables is taken as the spatial distribution consistency index of the cables. The spatial distribution consistency index is used to quantify the spatial distribution consistency of the two cables in the cable tunnel.

[0027] S230: Analyze the cable sheath loop connectivity based on the cable sheath circulation current; The specific steps to analyze the cable sheath loop connectivity include: Obtain the cable sheath circulating current and sort the cable sheath circulating current according to the acquisition time to obtain the cable sheath circulating current time series; The standard deviation of the cable sheath circulating current in the monitoring period and the sheath circulating current covariance of the two cables in the same monitoring period are calculated through the cable sheath circulating current time series; The product of the standard deviations of the sheath circulating currents of the two cables in the same monitoring period is taken as the normalization factor; The ratio of the sheath circulating current covariance to the normalization factor is taken as the sheath loop connectivity index of the cable. The sheath loop connectivity index is used to quantify the sheath loop connectivity of two cables.

[0028] S240: Analyze the degree of cable distribution correlation based on spatial distribution consistency and sheath loop connectivity; The specific steps to analyze the degree of cable distribution correlation include: Obtain the spatial distribution consistency index and sheath loop connectivity index of the cable; The cable distribution correlation index is obtained by weighted summing the spatial distribution consistency index and the sheath loop connectivity index. The cable distribution correlation index is used to quantify the distribution correlation degree of two cables.

[0029] S250: Analyze the cable operation status by combining the cable operation parameters with the cable distribution correlation degree and issue a cable fault alarm; The specific steps for analyzing the cable operation status and issuing cable fault alarms include: Obtain cable operation parameters and cable distribution correlation index; The cables whose cable distribution correlation index is greater than a preset cable distribution correlation threshold are regarded as adjacent cables; The consistency of the operating parameter fluctuations of adjacent cables is analyzed by dynamic time warping algorithm, and the consistency index of the operating parameter fluctuations is obtained. When the cable operating parameters exceed the preset operating range, a cable fault alarm is issued and the fault is located in combination with the consistency of the operating parameter fluctuations of adjacent cables; The specific steps of fault location based on the consistency of the operating parameter fluctuations of adjacent cables include: When the cable operating parameters of the faulty cable are not missing, the cable operating parameters of the faulty cable are used to locate the fault; When the cable operating parameters of the faulty cable are missing, the cable operating parameters of the faulty cable are interpolated and repaired according to the consistency of the fluctuation of the operating parameters of the adjacent cables, and the interpolated and repaired cable operating parameters are used to locate the fault; The specific steps of interpolating and repairing the cable operating parameters of the faulty cable include: When the operating parameter fluctuation consistency index is greater than a preset operating parameter fluctuation consistency threshold, extracting the missing time of the cable operating parameters of the faulty cable; The weighted mean of the cable operation parameter change rates corresponding to the adjacent cables at the same missing moment is taken as the cable operation parameter change coefficient, and the weighted weight of the cable operation parameter change rate is the ratio of the cable distribution correlation index of the adjacent cables to the mean of the cable distribution correlation index; The missing value of the faulty cable is calculated by the cable operation parameter variation coefficient and interpolated and repaired. The missing value is the product of the cable operation parameter of the faulty cable closest to the missing time and the corresponding cable operation parameter variation coefficient; When the operating parameter fluctuation consistency index is less than or equal to the preset operating parameter fluctuation consistency threshold, the cable operating parameters of the faulty cable are interpolated and repaired by the moving average method, and the mean values ​​of the operating parameters of the cable operating parameters of the faulty cable at adjacent time points are used as missing values ​​for interpolation and repair.

[0030] The above parameters and steps in the online monitoring and alarm method for high-voltage cable operating parameters of the present application can refer to the above parameters and steps of each unit module to implement the corresponding functions in the embodiment of an online monitoring and alarm system for high-voltage cable operating parameters, and will not be repeated here.

[0031] Please refer to Figure 3 The embodiment of the present invention further provides an electronic device 300, including a memory 310, a processor 320 and a communication bus 330; the memory 310 and the processor 320 are connected via the communication bus 330. The memory 310 stores a method for online monitoring and alarming of high-voltage cable operating parameters provided in the above embodiment, which can be loaded and executed by the processor 320.

[0032] The memory 310 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 310 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function, and instructions for implementing a high-voltage cable operating parameter online monitoring and alarm method provided in the above embodiment, etc.; the data storage area may store data involved in a high-voltage cable operating parameter online monitoring and alarm method provided in the above embodiment, etc.

[0033] The processor 320 may include one or more processing cores. The processor 320 executes various functions and processes data of the present application by running or executing instructions, programs, code sets or instruction sets stored in the memory 310, calling the data stored in the memory 310. The processor 320 may be at least one of an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a central processing unit (CPU), a controller, a microcontroller and a microprocessor. It can be understood that for different devices, the electronic device used to implement the above-mentioned processor 320 function can also be other, and the embodiment of the present application is not specifically limited.

[0034] The communication bus 330 may include a path to transmit information between the above components. The communication bus 330 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The communication bus 330 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one double arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0035] An embodiment of the present application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and execute a method for online monitoring and alarming of high-voltage cable operating parameters as provided in the above embodiment.

[0036] In an embodiment of the present application, a computer-readable storage medium may be a tangible device that holds and stores instructions used by an instruction execution device. A computer-readable storage medium may be, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination thereof. Specifically, a computer-readable storage medium may be a portable computer disk, a hard disk, a USB flash drive, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a podium random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, an optical disk, a magnetic disk, a mechanical encoding device, and any combination thereof.

[0037] The terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0038] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of application involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the aforementioned application concept. For example, the above features are replaced with (but not limited to) technical features with similar functions applied in the present application.

Claims

1. An online monitoring and alarm system for high-voltage cable operating parameters, characterized in that: It includes cable parameter acquisition module, spatial distribution consistency analysis module, sheath loop connectivity analysis module, cable distribution correlation analysis module and cable fault alarm module; The cable parameter acquisition module is used to acquire the cable distribution parameters and cable operation parameters of the high-voltage cable, and the cable operation parameters include the cable surface temperature, the cable load current and the cable sheath circulation current; The spatial distribution consistency analysis module is used to analyze the spatial distribution consistency of the cables in the cable tunnel according to the cable distribution parameters; The sheath loop connectivity analysis module is used to analyze the sheath loop connectivity of the cable according to the cable sheath circulation; The cable distribution correlation analysis module is used to analyze the cable distribution correlation degree according to the spatial distribution consistency and sheath loop connectivity; The cable fault alarm module is used to analyze the cable operation status and issue a cable fault alarm by combining the cable operation parameters with the cable distribution correlation degree.

2. A high-voltage cable operating parameter online monitoring and alarm system according to claim 1, characterized in that: The spatial distribution consistency analysis module is used to analyze the spatial distribution consistency of the cable in the cable tunnel according to the cable distribution parameters. The specific analysis steps include: Obtaining cable distribution parameters, which include cable laying paths and cable path lengths; The cable co-linear length is obtained by analyzing the cable laying paths of the two cables, and the cable co-linear length is the overlapping length of the cable laying paths of the two cables; The ratio of the colinear length of the two cables to the minimum cable path length of the two cables is taken as the spatial distribution consistency index of the cables. The spatial distribution consistency index is used to quantify the spatial distribution consistency of the two cables in the cable tunnel.

3. The online monitoring and alarm system for high-voltage cable operating parameters according to claim 1 is characterized in that: The sheath loop connectivity analysis module is used to analyze the sheath loop connectivity of the cable according to the cable sheath circulation, and the specific analysis steps include: Obtain the cable sheath circulating current and sort the cable sheath circulating current according to the acquisition time to obtain the cable sheath circulating current time series; The standard deviation of the cable sheath circulating current in the monitoring period and the sheath circulating current covariance of the two cables in the same monitoring period are calculated through the cable sheath circulating current time series; The product of the standard deviations of the sheath circulating currents of the two cables in the same monitoring period is taken as the normalization factor; The ratio of the sheath circulating current covariance to the normalization factor is taken as the sheath loop connectivity index of the cable. The sheath loop connectivity index is used to quantify the sheath loop connectivity of two cables.

4. The online monitoring and alarm system for high-voltage cable operating parameters according to claim 1 is characterized in that: The cable distribution correlation analysis module is used to analyze the cable distribution correlation degree according to the spatial distribution consistency and sheath loop connectivity. The specific analysis steps include: Obtain the spatial distribution consistency index and sheath loop connectivity index of the cable; The cable distribution correlation index is obtained by weighted summing the spatial distribution consistency index and the sheath loop connectivity index. The cable distribution correlation index is used to quantify the distribution correlation degree of two cables.

5. The online monitoring and alarm system for high-voltage cable operating parameters according to claim 1 is characterized in that: The cable fault alarm module is used to analyze the cable operation status and perform cable fault alarm by combining the cable operation parameters with the cable distribution correlation degree. The specific analysis steps include: Obtain cable operation parameters and cable distribution correlation index; The cables whose cable distribution correlation index is greater than a preset cable distribution correlation threshold are regarded as adjacent cables; The consistency of the operating parameter fluctuations of adjacent cables is analyzed by dynamic time warping algorithm, and the consistency index of the operating parameter fluctuations is obtained. When the cable operating parameters exceed the preset operating range, a cable fault alarm is issued and the fault is located in combination with the consistency of the operating parameter fluctuations of adjacent cables.

6. A high-voltage cable operating parameter online monitoring and alarm system according to claim 5, characterized in that: The fault location is performed in combination with the consistency of fluctuations of operating parameters of adjacent cables, including: When the cable operating parameters of the faulty cable are not missing, the cable operating parameters of the faulty cable are used to locate the fault; When the cable operating parameters of the faulty cable are missing, the cable operating parameters of the faulty cable are interpolated and repaired according to the consistency of the operating parameter fluctuations of the adjacent cables, and the interpolated and repaired cable operating parameters are used to locate the fault.

7. A high-voltage cable operating parameter online monitoring and alarm system according to claim 6, characterized in that: The interpolation repair of the cable operating parameters of the faulty cable includes: When the operating parameter fluctuation consistency index is greater than a preset operating parameter fluctuation consistency threshold, extracting the missing time of the cable operating parameters of the faulty cable; The weighted mean of the cable operation parameter change rates corresponding to the adjacent cables at the same missing moment is taken as the cable operation parameter change coefficient, and the weighted weight of the cable operation parameter change rate is the ratio of the cable distribution correlation index of the adjacent cables to the mean of the cable distribution correlation index; The missing value of the faulty cable is calculated by the cable operation parameter variation coefficient and interpolated and repaired. The missing value is the product of the cable operation parameter of the faulty cable closest to the missing time and the corresponding cable operation parameter variation coefficient; When the operating parameter fluctuation consistency index is less than or equal to the preset operating parameter fluctuation consistency threshold, the cable operating parameters of the faulty cable are interpolated and repaired by the moving average method, and the mean values ​​of the operating parameters of the cable operating parameters of the faulty cable at adjacent time points are used as missing values ​​for interpolation and repair.

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