CN118074337A - Medium voltage self-monitoring and fault positioning system based on smart cable - Google Patents
Medium voltage self-monitoring and fault positioning system based on smart cable Download PDFInfo
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Abstract
The invention relates to the technical field of intelligent cable fault monitoring, and provides a medium-voltage self-monitoring and fault positioning system based on an intelligent cable, which comprises an optical fiber sensing signal receiving terminal, a fault positioning terminal, an intelligent cable self-monitoring parameter acquisition terminal and a monitoring early warning terminal; the optical fiber sensing signal receiving terminal is used for receiving an optical fiber sensing signal from the smart cable; an optical fiber sensing module is arranged in the smart cable along the length direction of the cable; the optical fiber sensing module is used for providing optical fiber sensing signals; the fault positioning terminal is used for analyzing temperature data of each position of the smart cable according to the optical fiber sensing signals, judging and positioning fault positions of the smart cable, and generating fault positioning information; the smart cable self-monitoring parameter acquisition terminal is used for acquiring self-monitoring parameters from the smart cable; and the monitoring and early warning terminal is used for performing monitoring and early warning analysis according to the self-monitoring parameters and generating early warning information. The intelligent cable fault locating system has the effect of improving the monitoring quality and fault locating quality of the intelligent cable.
Description
Technical Field
The invention relates to the technical field of intelligent cable fault monitoring, in particular to a medium-voltage self-monitoring and fault positioning system based on intelligent cables.
Background
A smart cable is a cable with monitoring and communication functions that can collect data in real time about the state of the cable itself and the surrounding environmental conditions. This type of cable typically integrates sensors, optical fibers, and data transmission technology, enabling the grid operator to monitor cable performance in real time, discover and solve problems in time, thereby improving the reliability and efficiency of the grid. The cable self-monitoring and fault locating system is one kind of high-level management system with integrated sensor, communication and analysis technology and specially designed for power cable. The system can monitor the state of the cable in real time, automatically detect the problems in the system and accurately position the fault point. Such systems are critical to improving the reliability and efficiency of power distribution.
A number of cable monitoring and fault locating systems have been developed, and through extensive searching and reference, the cable monitoring and fault locating systems of the prior art have been found to have cable monitoring and fault locating systems as disclosed in publication nos. CN108169620A, CN113805009A, CN113671307A, EP1705811A1, US4389694A, JP2017520750a, which generally include: the system comprises a cable monitoring data acquisition terminal, a fault location analysis terminal and a fault location information generation terminal; the cable monitoring data acquisition terminal is used for acquiring monitoring data of the corresponding cable; the fault location analysis terminal is used for carrying out fault location analysis according to the monitoring data; the fault location information generation terminal is used for generating corresponding fault location information according to the fault location analysis result. Because above-mentioned cable control and fault location system's mode is comparatively single, if be used for monitoring and fault location to wisdom cable, then be unfavorable for with different wisdom cable adaptations, caused the defect that the system reduced wisdom cable's control quality and fault location quality.
Disclosure of Invention
The invention aims to provide a medium-voltage self-monitoring and fault locating system based on a smart cable, aiming at the defects of the cable monitoring and fault locating system.
The invention adopts the following technical scheme:
A medium-voltage self-monitoring and fault positioning system based on a smart cable comprises an optical fiber sensing signal receiving terminal, a fault positioning terminal, a smart cable self-monitoring parameter acquisition terminal and a monitoring early warning terminal; an optical fiber sensing module is arranged in the smart cable along the length direction of the cable; the optical fiber sensing module is used for providing optical fiber sensing signals; the optical fiber sensing signal receiving terminal is used for receiving an optical fiber sensing signal from the optical fiber sensing module; the fault positioning terminal is used for analyzing temperature data of each position of the smart cable according to the optical fiber sensing signals, judging and positioning fault positions of the smart cable and generating fault positioning information; the fault positioning information comprises temperature data of the fault position of the smart cable and a radio frequency identification number interval of the fault position of the smart cable; at least two radio frequency identification tags are embedded in the smart cable at equal intervals along the length direction of the cable; the radio frequency identification tag corresponds to a unique radio frequency identification number; the smart cable self-monitoring parameter acquisition terminal is used for acquiring self-monitoring parameters from the smart cable; the self-monitoring parameters comprise voltage deviation data, current deviation data and buried depth data; and the monitoring and early warning terminal is used for performing monitoring and early warning analysis according to the self-monitoring parameters and generating early warning information.
Optionally, the fault locating terminal comprises a temperature analysis module, a fault judging module and a fault locating information generating module; the temperature analysis module is used for carrying out temperature analysis according to the optical fiber sensing signals to generate temperature information of the smart cable at all positions in the cable length direction; the fault judging module is used for judging faults of the wisdom cable in the cable length direction according to the temperature information of the wisdom cable in the cable length direction, and generating fault judging information of the wisdom cable in the cable length direction; the fault locating information generation module is used for generating fault locating information for the cable position and corresponding temperature information, wherein the cable position is indicated to have faults, by the fault judging information.
Optionally, the fault location information generating module comprises a temperature data reading sub-module at the fault position of the smart cable, a radio frequency identification number interval determining sub-module at the fault position of the smart cable and a fault location information generating sub-module; the intelligent cable fault temperature data reading submodule is used for reading intelligent cable fault temperature data in cable position temperature information with faults indicated by fault judging information; the intelligent cable fault position radio frequency identification number interval determining submodule is used for determining an intelligent cable fault position radio frequency identification number interval corresponding to the cable position with the fault according to the fault judging information indicating the cable position with the fault and the setting condition of the radio frequency identification tag; the fault location information generation sub-module is used for generating corresponding fault location information according to the temperature data of the fault position of the smart cable and the radio frequency identification number interval of the fault position of the smart cable.
Optionally, the smart cable self-monitoring parameter acquisition terminal comprises a voltage deviation data acquisition module, a current deviation data acquisition module, an underground environment humidity data acquisition module and a buried depth data acquisition module; the smart cable is provided with a voltage sensing module and a current sensing module; the voltage deviation data acquisition module is used for acquiring voltage deviation data from the voltage sensing module on the smart cable; the current deviation data acquisition module is used for acquiring current deviation data from the current sensing module on the smart cable; at least two humidity sensing modules are arranged on the outer side of the smart cable at equal intervals along the length direction of the cable; the underground environment humidity data acquisition module is used for acquiring underground environment humidity data from the humidity sensing module; the buried depth data acquisition module is used for acquiring buried depth data recorded by smart cable installers.
Optionally, the monitoring and early warning terminal comprises a monitoring and early warning index calculation module and an early warning information generation module; the monitoring early warning index calculation module is used for calculating a monitoring early warning index according to the self-monitoring parameters and the temperature information; the early warning information generation module is used for generating corresponding early warning information according to the early warning index;
When the monitoring early warning index calculation module works, the following formula is satisfied:
；
Wherein Q represents a monitoring early warning index; d 1 represents a buried depth value; f 1(D1) represents a weight coefficient based on the depth of the buried, and is positively correlated with D 1; d 2a denotes fault determination information indicating a distance between a cable location where a fault exists and a cable center point; f 2(D2a) represents a tuning coefficient based on the distance between the cable position with the fault and the cable center point, and is inversely related to D 2a; Δw a is a temperature deviation value of the temperature of the cable position where the fault exists and the temperature reference value in the a-th fault determination information; a represents failure determination information of the wisdom cable, which represents the total number of cable positions where failures exist; deltaV represents voltage deviation data between the measured voltage and the reference voltage of the smart cable; f 3 (Δv) represents an early warning score based on the voltage deviation data, and is positively correlated with Δv; Δi represents current deviation data between the measured current and the reference current of the smart cable; f 4 (Δi) represents an early warning score based on the current deviation data, positively correlated with Δi;
When Q is more than or equal to Q ref, the early warning information generation module generates early warning information for representing that safety risks exist; q ref represents an early warning threshold value, which is empirically set by an administrator.
The utility model provides a medium voltage self-monitoring and fault location method based on wisdom cable, is applied to a medium voltage self-monitoring and fault location system based on wisdom cable as above, medium voltage self-monitoring and fault location method includes:
S1, receiving an optical fiber sensing signal from a smart cable;
S2, analyzing temperature data of each position of the smart cable according to the optical fiber sensing signals, judging and positioning fault positions of the smart cable, and generating fault positioning information;
S3, acquiring self-monitoring parameters from the smart cable;
and S4, monitoring and early warning analysis is carried out according to the self-monitoring parameters, and early warning information is generated.
The beneficial effects obtained by the invention are as follows:
1. The arrangement of the optical fiber sensing signal receiving terminal, the fault positioning terminal, the intelligent cable self-monitoring parameter obtaining terminal and the monitoring early warning terminal is beneficial to improving the efficiency of fault judgment and positioning by efficiently analyzing the optical fiber sensing signal and directly judging the fault position of the intelligent cable based on the internal temperature of the intelligent cable; the radio frequency identification tag and the number at the fault position of the smart cable are beneficial to the workers on the ground to quickly find the corresponding fault position of the smart cable; the monitoring mode of the system to the smart cable is enriched through abundant self-monitoring parameters such as voltage deviation data, current deviation data, underground environment humidity data and buried depth data, so that the monitoring process and generated early warning information of the system to the smart cable are more accurate and efficient, and the monitoring quality and fault positioning quality of the system to the smart cable are improved;
2. The temperature analysis module, the fault judging module and the fault positioning information generating module are arranged for carrying out temperature analysis through optical fiber sensing signals, so that the temperature information of the intelligent cable in each position in the length direction of the cable can be obtained quickly, the speed and the accuracy of the temperature information obtaining process can be improved, the accuracy of fault judgment and fault positioning information can be improved, and the monitoring quality and the fault positioning quality of the intelligent cable by the system can be improved;
3. the intelligent cable fault temperature data reading sub-module, the intelligent cable fault radio frequency identification number interval determining sub-module and the fault locating information generating sub-module are arranged, the fault judging information is used for indicating the cable position with faults and the setting condition of the radio frequency identification tag is used for determining the intelligent cable fault radio frequency identification number interval corresponding to the cable position with faults, so that the accuracy of the fault locating information is improved further, and a maintenance worker on the ground can find the fault position of the intelligent cable more quickly and more efficiently through the intelligent cable fault radio frequency identification number interval, and the monitoring quality and the fault locating quality of the intelligent cable by the system are improved further;
4. The arrangement of the voltage deviation data acquisition module, the current deviation data acquisition module, the underground environment humidity data acquisition module and the buried depth data acquisition module simultaneously acquires various data from the intelligent cable through different data acquisition modules, thereby being beneficial to improving the accuracy and efficiency of data acquisition and further being beneficial to improving the accuracy and efficiency of intelligent cable self-monitoring parameter acquisition, and further being beneficial to improving the monitoring quality and fault positioning quality of the intelligent cable by the system;
5. The arrangement of the monitoring early warning index calculation module and the early warning information generation module is matched with a monitoring early warning index algorithm, and the accuracy of early warning information is improved by calculating accurate monitoring early warning indexes, so that the monitoring early warning function of the system is more timely and accurate, and the monitoring quality and fault positioning quality of the system to the intelligent cable are improved;
6. The environment safety risk assessment terminal, the cable outside environment temperature sensing module, the pressure sensing module, the cable outside environment temperature data acquisition module and the pressure data acquisition module are matched with the environment safety risk assessment index algorithm, the accuracy of environment safety risk assessment is improved by increasing the types of self-monitoring parameters, and further the working modes of the system are further enriched through the newly-added environment safety risk assessment function, so that the monitoring quality and the fault positioning quality of the intelligent cable by the system are improved.
For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a fault location information generating module according to the present invention;
FIG. 3 is a schematic flow chart of a method for medium voltage self-monitoring and fault location based on smart cable according to the present invention;
FIG. 4 is a schematic diagram of an environmental security assessment terminal according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a smart cable self-monitoring parameter acquisition terminal according to another embodiment of the present invention.
Detailed Description
The following embodiments of the present invention are described in terms of specific examples, and those skilled in the art will appreciate the advantages and effects of the present invention from the disclosure herein. The invention is capable of other and different embodiments and its several details are capable of modification and variation in various respects, all without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not drawn to actual dimensions, and are stated in advance. The following embodiments will further illustrate the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
Embodiment one: the embodiment provides a medium voltage self-monitoring and fault positioning system based on a smart cable. Referring to fig. 1, a smart cable-based medium voltage self-monitoring and fault locating system comprises an optical fiber sensing signal receiving terminal, a fault locating terminal, a smart cable self-monitoring parameter obtaining terminal and a monitoring early warning terminal; an optical fiber sensing module is arranged in the smart cable along the length direction of the cable; the optical fiber sensing module is used for providing optical fiber sensing signals; the optical fiber sensing signal receiving terminal is used for receiving an optical fiber sensing signal from the optical fiber sensing module; the fault positioning terminal is used for analyzing temperature data of each position of the smart cable according to the optical fiber sensing signals, judging and positioning fault positions of the smart cable and generating fault positioning information; the optical fiber sensing module measures the temperature of the cable everywhere, and the application of the optical fiber sensor in the field of cable monitoring is generally based on a technology called distributed temperature sensing (the english name is Distributed lemperatureSensing, DTS); the fault positioning information comprises temperature data of the fault position of the smart cable and a radio frequency identification number interval of the fault position of the smart cable; at least two radio frequency identification tags are embedded in the smart cable at equal intervals along the length direction of the cable; the radio frequency identification tag corresponds to a unique radio frequency identification number; the smart cable self-monitoring parameter acquisition terminal is used for acquiring self-monitoring parameters from the smart cable; the self-monitoring parameters comprise voltage deviation data, current deviation data, underground environment humidity data and buried depth data; and the monitoring and early warning terminal is used for performing monitoring and early warning analysis according to the self-monitoring parameters and generating early warning information.
Optionally, the fault locating terminal comprises a temperature analysis module, a fault judging module and a fault locating information generating module; the temperature analysis module is used for carrying out temperature analysis according to the optical fiber sensing signals to generate temperature information of the smart cable at all positions in the cable length direction; the fault judging module is used for judging faults of the wisdom cable in the cable length direction according to the temperature information of the wisdom cable in the cable length direction, and generating fault judging information of the wisdom cable in the cable length direction; the fault locating information generation module is used for generating fault locating information for the cable position and corresponding temperature information, wherein the cable position is indicated to have faults, by the fault judging information.
Optionally, referring to fig. 2, the fault location information generating module includes a smart cable fault location temperature data reading sub-module, a smart cable fault location radio frequency identification number interval determining sub-module, and a fault location information generating sub-module; the intelligent cable fault temperature data reading submodule is used for reading intelligent cable fault temperature data in cable position temperature information with faults indicated by fault judging information; the intelligent cable fault position radio frequency identification number interval determining submodule is used for determining an intelligent cable fault position radio frequency identification number interval corresponding to the cable position with the fault according to the fault judging information indicating the cable position with the fault and the setting condition of the radio frequency identification tag; the fault location information generation sub-module is used for generating corresponding fault location information according to the temperature data of the fault position of the smart cable and the radio frequency identification number interval of the fault position of the smart cable.
It should be noted that, when maintenance workers obtain the radio frequency identification number interval of the smart cable fault from the fault location information, the maintenance workers can go to the embedded position of the smart cable and then identify and read the radio frequency identification tag on the underground smart cable through the radio frequency identification reading device on the ground until the radio frequency identification number of the smart cable fault corresponding to the radio frequency identification number interval of the smart cable fault is read, and then the quick location of the cable fault point is completed.
Optionally, the smart cable self-monitoring parameter acquisition terminal comprises a voltage deviation data acquisition module, a current deviation data acquisition module, an underground environment humidity data acquisition module and a buried depth data acquisition module; the smart cable is provided with a voltage sensing module and a current sensing module; the voltage deviation data acquisition module is used for acquiring voltage deviation data from the voltage sensing module on the smart cable; the current deviation data acquisition module is used for acquiring current deviation data from the current sensing module on the smart cable; at least two humidity sensing modules are arranged on the outer side of the smart cable at equal intervals along the length direction of the cable; the underground environment humidity data acquisition module is used for acquiring underground environment humidity data from the humidity sensing module; the buried depth data acquisition module is used for acquiring buried depth data recorded by smart cable installers.
Optionally, the monitoring and early warning terminal comprises a monitoring and early warning index calculation module and an early warning information generation module; the monitoring early warning index calculation module is used for calculating a monitoring early warning index according to the self-monitoring parameters and the temperature information; the early warning information generation module is used for generating corresponding early warning information according to the early warning index;
When the monitoring early warning index calculation module works, the following formula is satisfied:
；
Wherein Q represents a monitoring early warning index; f 1(D1) represents a weight coefficient based on the depth of the buried, and is positively correlated with D 1; d 1 represents a buried depth value, and specifically, the buried depth of the cable can be obtained by using an underground cable detector; d 2a represents fault determination information, which represents the distance between the cable position with the fault and the cable center point, where the cable center point is the center point position of the tested cable; f 2(D2a) represents a tuning coefficient based on the distance between the cable position with the fault and the cable center point, and is inversely related to D 2a; Δw a is a temperature deviation value of the temperature of the cable position where the fault exists and the temperature reference value in the a-th fault determination information; a represents failure determination information of the wisdom cable, which represents the total number of cable positions where failures exist; deltaV represents voltage deviation data between the measured voltage and the reference voltage of the smart cable; f 3 (Δv) represents an early warning score based on the voltage deviation data, and is positively correlated with Δv; Δi represents current deviation data between the measured current and the reference current of the smart cable; f 4 (Δi) represents an early warning score based on the current deviation data, positively correlated with Δi;
When Q is more than or equal to Q ref, the early warning information generation module generates early warning information for representing that safety risks exist; q ref represents an early warning threshold value, which is empirically set by an administrator.
Specifically, when the monitoring early warning index calculation module works, the weight coefficient based on the buried depth, the value adjustment coefficient based on the distance between the cable position with the fault and the cable center point, the early warning score based on voltage deviation data and the early warning score based on current deviation data are calculated respectively by the following formulas:
；
Wherein k 1 represents a weight reference value, k 1 > 1 is satisfied, and the closer the horizontal distance between the buried position of the smart cable and the building is set by the administrator according to the actual situation, the larger the value of k 1 is, for example: the horizontal distance between the smart cable burying position and the building is 10 meters, the administrator sets the value of k 1 to 1, the horizontal distance between the smart cable burying position and the building is 8 meters, and the administrator sets the value of k 1 to 2;
；
；
；
Wherein L represents the total length value of the smart cable; k 2 represents the voltage deviation score coefficient, which is empirically set by an administrator; v test represents a smart cable real-time detection voltage value in the voltage deviation data; v ref denotes a smart cable voltage reference value; k 3 represents the current deviation score coefficient, which is empirically set by an administrator; i test represents a smart cable real-time detection current value in the current deviation data; i ref denotes a smart cable current reference value; i TEST represents a detection current value when the smart cable is last maintained and detected; the worker regularly performs maintenance checks for the smart cable, and the regular time intervals may be, but are not limited to: three months, six months and one year.
It should be noted that the number of the components,; W test is a detected temperature value in temperature information indicating a cable position where a fault exists in the fault determination information; w ref refers to a temperature reference value.
The utility model provides a medium voltage self-monitoring and fault location method based on wisdom cable, is applied to a medium voltage self-monitoring and fault location system based on wisdom cable as above, combines the figure 3 to show, medium voltage self-monitoring and fault location method includes:
S1, receiving an optical fiber sensing signal from a smart cable;
S2, analyzing temperature data of each position of the smart cable according to the optical fiber sensing signals, judging and positioning fault positions of the smart cable, and generating fault positioning information;
S3, acquiring self-monitoring parameters from the smart cable;
and S4, monitoring and early warning analysis is carried out according to the self-monitoring parameters, and early warning information is generated.
In summary, by the system, the fault position of the smart cable is directly determined based on the internal temperature of the smart cable through the high-efficiency analysis of the optical fiber sensing signals, so that the efficiency of fault determination and positioning is improved; the radio frequency identification tag and the number at the fault position of the smart cable are beneficial to the workers on the ground to quickly find the corresponding fault position of the smart cable; the monitoring mode of the system to the smart cable is enriched through abundant self-monitoring parameters such as voltage deviation data, current deviation data, underground environment humidity data, buried depth data and the like, so that the monitoring process and the generated early warning information of the system to the smart cable are more accurate and efficient; the temperature analysis is carried out through the optical fiber sensing signals, so that the temperature information of the smart cable at each position in the length direction of the cable can be obtained quickly, the speed and the accuracy of the temperature information obtaining process can be improved, and the accuracy of fault judgment and fault positioning information can be improved; determining a radio frequency identification number interval of a smart cable fault position corresponding to the cable position with the fault by the fault judgment information according to the cable position with the fault and the setting condition of the radio frequency identification tag, thereby being beneficial to further improving the accuracy of fault positioning information and being beneficial to more quickly and efficiently finding the fault position of the smart cable by a maintenance worker on the ground through the radio frequency identification number interval of the smart cable fault position; the accuracy of the early warning information is improved by calculating the accurate monitoring early warning index, so that the monitoring early warning function of the system is more timely and accurate, and the monitoring quality and the fault positioning quality of the intelligent cable by the system are improved.
Embodiment two: the embodiment includes the whole content of the first embodiment, and provides a smart cable-based medium voltage self-monitoring and fault positioning system, which is shown in fig. 4, and further includes an environmental security risk assessment terminal; at least two cable outside environment temperature sensing modules and at least two pressure sensing modules are arranged on the outer side of the smart cable at equal intervals along the length direction of the cable; the cable outside environment temperature sensing module is used for detecting the cable outside environment temperature outside the cable; the pressure sensing module is used for detecting the pressure applied to the outer side of the cable; referring to fig. 5, the smart cable self-monitoring parameter acquisition terminal further includes a cable outside environment temperature data acquisition module and a pressure data acquisition module; the cable outside environment temperature data acquisition module is used for acquiring cable outside environment temperature data from the cable outside environment temperature sensing module outside the smart cable; the pressure data acquisition module is used for acquiring pressure data from the pressure sensing module outside the smart cable; the environment safety risk assessment terminal is used for carrying out environment safety risk assessment according to the outside environment temperature data, the pressure data and the underground environment humidity data of the cable, and generating environment safety risk assessment information.
The environment safety risk assessment terminal comprises an environment safety risk index calculation module and an environment safety risk assessment information generation module; the environment safety risk index calculation module is used for calculating the environment safety risk index of the corresponding smart cable according to the outside environment temperature data, the pressure data and the underground environment humidity data of the cable; the environmental security risk assessment information generation module is used for generating corresponding environmental security risk assessment information according to the environmental security risk index.
When the environmental security risk assessment index calculation module works, the following formula is satisfied:
；
；
；
；
；
Wherein risk represents the environmental security risk assessment index of the smart cable; g 1 (Y) represents an assessment index sensitivity function based on the years of use of the cable; y represents the number of years of service of the cable of the smart cable, calculated by 0 years less than half a year, calculated by 1 year more than half a year; beta 1 represents a first impact scoring coefficient, set by the administrator according to the actual situation, the larger the diameter of the smart cable, the larger beta 1, for example: beta 1 is set to 1.5 when the diameter of the smart cable is 10 cm, and beta 1 is set to 2 when the diameter of the smart cable is 15 cm;
g 2 (F) represents a compression pressure influence scoring function based on the compression pressure outside the cable in the compression pressure data; f represents the maximum pressure on the outer side of the cable in all the pressure data, and the maximum pressure is the maximum value of all the pressure sensing module measured values in a preset measuring period; β 2 represents a second influence scoring coefficient, set by the administrator according to the actual situation, the smaller the outermost protective layer thickness of the smart cable, the larger β 2, for example: beta 2 is set to 3 when the thickness of the outermost protective layer of the smart cable is 1 cm, and beta 2 is set to 1 when the thickness of the outermost protective layer of the smart cable is 3 cm; f 0 represents a pressure threshold value, which is set empirically by an administrator;
g 3 (R) represents the cable outside environmental humidity influence scoring function based on the total subsurface environmental humidity data; r represents the maximum humidity value of the outer side of the cable in all underground environment humidity data, and the maximum humidity value is the maximum value of all humidity sensing module measured values in a preset measuring period; beta 3 represents a third influence scoring coefficient, empirically set by the administrator;
g 4 (T) represents the cable outside environment temperature influence scoring function based on the total cable outside environment temperature; t represents the maximum cable outside ambient temperature value outside the cable in all cable outside ambient temperature data; beta 4 represents a fourth influence scoring coefficient, empirically set by the administrator;
When risk is more than or equal to J ref, the environmental security risk assessment information generation module generates environmental security risk assessment information used for indicating that the smart cable has environmental security risk; j ref denotes an environmental security risk assessment judgment threshold value, which is empirically set by an administrator.
In summary, the environmental security risk assessment terminal, the cable outside environmental temperature sensing module, the pressure sensing module, the cable outside environmental temperature data acquisition module and the pressed pressure data acquisition module are set in cooperation with the environmental security risk assessment index algorithm, and by increasing the types of the self-monitoring parameters, the accuracy of environmental security risk assessment is improved, and further the working modes of the system are further enriched through the newly-added environmental security risk assessment function, so that the monitoring quality and the fault positioning quality of the system to the smart cable are improved.
The foregoing disclosure is only a preferred embodiment of the present invention and is not intended to limit the scope of the invention, so that all equivalent technical changes made by the application of the present invention and the accompanying drawings are included in the scope of the invention, and in addition, the elements in the invention can be updated with the technical development.
Claims (6)
1. The medium-voltage self-monitoring and fault positioning system based on the smart cable is characterized by comprising an optical fiber sensing signal receiving terminal, a fault positioning terminal, a smart cable self-monitoring parameter acquisition terminal and a monitoring early warning terminal; an optical fiber sensing module is arranged in the smart cable along the length direction of the cable; the optical fiber sensing module is used for providing optical fiber sensing signals; the optical fiber sensing signal receiving terminal is used for receiving an optical fiber sensing signal from the optical fiber sensing module; the fault positioning terminal is used for analyzing temperature data of each position of the smart cable according to the optical fiber sensing signals, judging and positioning fault positions of the smart cable and generating fault positioning information; the fault positioning information comprises temperature data of the fault position of the smart cable and a radio frequency identification number interval of the fault position of the smart cable; at least two radio frequency identification tags are embedded in the smart cable at equal intervals along the length direction of the cable; the radio frequency identification tag corresponds to a unique radio frequency identification number; the smart cable self-monitoring parameter acquisition terminal is used for acquiring self-monitoring parameters from the smart cable; the self-monitoring parameters comprise voltage deviation data, current deviation data and buried depth data; and the monitoring and early warning terminal is used for performing monitoring and early warning analysis according to the self-monitoring parameters and generating early warning information.
2. The intelligent cable-based medium voltage self-monitoring and fault locating system according to claim 1, wherein the fault locating terminal comprises a temperature analysis module, a fault judging module and a fault locating information generating module; the temperature analysis module is used for carrying out temperature analysis according to the optical fiber sensing signals to generate temperature information of the smart cable at all positions in the cable length direction; the fault judging module is used for judging faults of the wisdom cable in the cable length direction according to the temperature information of the wisdom cable in the cable length direction, and generating fault judging information of the wisdom cable in the cable length direction; the fault locating information generation module is used for generating fault locating information for the cable position and corresponding temperature information, wherein the cable position is indicated to have faults, by the fault judging information.
3. The intelligent cable-based medium voltage self-monitoring and fault locating system according to claim 2, wherein the fault locating information generating module comprises a intelligent cable fault temperature data reading sub-module, a intelligent cable fault radio frequency identification number interval determining sub-module and a fault locating information generating sub-module; the intelligent cable fault temperature data reading submodule is used for reading intelligent cable fault temperature data in cable position temperature information with faults indicated by fault judging information; the intelligent cable fault position radio frequency identification number interval determining submodule is used for determining an intelligent cable fault position radio frequency identification number interval corresponding to the cable position with the fault according to the fault judging information indicating the cable position with the fault and the setting condition of the radio frequency identification tag; the fault location information generation sub-module is used for generating corresponding fault location information according to the temperature data of the fault position of the smart cable and the radio frequency identification number interval of the fault position of the smart cable.
4. The intelligent cable-based medium voltage self-monitoring and fault locating system according to claim 3, wherein the intelligent cable self-monitoring parameter acquisition terminal comprises a voltage deviation data acquisition module, a current deviation data acquisition module and a buried depth data acquisition module; the smart cable is provided with a voltage sensing module and a current sensing module; the voltage deviation data acquisition module is used for acquiring voltage deviation data from the voltage sensing module on the smart cable; the current deviation data acquisition module is used for acquiring current deviation data from the current sensing module on the smart cable; the buried depth data acquisition module is used for acquiring buried depth data recorded by smart cable installers.
5. The intelligent cable-based medium-voltage self-monitoring and fault locating system is characterized in that the monitoring and early-warning terminal comprises a monitoring and early-warning index calculation module and an early-warning information generation module; the monitoring early warning index calculation module is used for calculating a monitoring early warning index according to the self-monitoring parameters and the temperature information; the early warning information generation module is used for generating corresponding early warning information according to the early warning index;
When the monitoring early warning index calculation module works, the following formula is satisfied:
；
Wherein Q represents a monitoring early warning index; d 1 represents a buried depth value; f 1(D1) represents a weight coefficient based on the depth of the buried, and is positively correlated with D 1; d 2a denotes fault determination information indicating a distance between a cable location where a fault exists and a cable center point; f 2(D2a) represents a tuning coefficient based on the distance between the cable position with the fault and the cable center point, and is inversely related to D 2a; Δw a is a temperature deviation value of the temperature of the cable position where the fault exists and the temperature reference value in the a-th fault determination information; a represents failure determination information of the wisdom cable, which represents the total number of cable positions where failures exist; deltaV represents voltage deviation data between the measured voltage and the reference voltage of the smart cable; f 3 (Δv) represents an early warning score based on the voltage deviation data, and is positively correlated with Δv; Δi represents current deviation data between the measured current and the reference current of the smart cable; f 4 (Δi) represents an early warning score based on the current deviation data, positively correlated with Δi;
When Q is more than or equal to Q ref, the early warning information generation module generates early warning information for representing that safety risks exist; q ref represents an early warning threshold.
6. The medium voltage self-monitoring and fault locating method based on the smart cable is applied to the medium voltage self-monitoring and fault locating system based on the smart cable as claimed in claim 5, and is characterized in that the medium voltage self-monitoring and fault locating method comprises the following steps:
S1, receiving an optical fiber sensing signal from a smart cable;
S2, analyzing temperature data of each position of the smart cable according to the optical fiber sensing signals, judging and positioning fault positions of the smart cable, and generating fault positioning information;
S3, acquiring self-monitoring parameters from the smart cable;
and S4, monitoring and early warning analysis is carried out according to the self-monitoring parameters, and early warning information is generated.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0472582A (en) * | 1990-07-13 | 1992-03-06 | Fujikura Ltd | Structure for laying optical fiber for detection in power cable line fault point detection system |
| JPH0735809A (en) * | 1993-07-20 | 1995-02-07 | Tokyo Electric Power Co Inc:The | Method and aparatus for detecting fault point of power cable |
| CN204854799U (en) * | 2015-07-07 | 2015-12-09 | 北京建筑大学 | Hydraulic pipe -line fault point detection device and hydraulic pipe -line monitored control system |
| CN115877126A (en) * | 2022-11-30 | 2023-03-31 | 广东电网有限责任公司 | Underground cable risk early warning system |
| CN117114033A (en) * | 2023-08-21 | 2023-11-24 | 深圳市爱德泰科技有限公司 | Cable management method and system based on radio frequency identification |
-
2024
- 2024-04-16 CN CN202410451253.4A patent/CN118074337A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0472582A (en) * | 1990-07-13 | 1992-03-06 | Fujikura Ltd | Structure for laying optical fiber for detection in power cable line fault point detection system |
| JPH0735809A (en) * | 1993-07-20 | 1995-02-07 | Tokyo Electric Power Co Inc:The | Method and aparatus for detecting fault point of power cable |
| CN204854799U (en) * | 2015-07-07 | 2015-12-09 | 北京建筑大学 | Hydraulic pipe -line fault point detection device and hydraulic pipe -line monitored control system |
| CN115877126A (en) * | 2022-11-30 | 2023-03-31 | 广东电网有限责任公司 | Underground cable risk early warning system |
| CN117114033A (en) * | 2023-08-21 | 2023-11-24 | 深圳市爱德泰科技有限公司 | Cable management method and system based on radio frequency identification |
Non-Patent Citations (1)
| Title |
|---|
| 张泰安: "光纤测温系统在电缆运行维护中的应用", 青海电力, vol. 30, 31 December 2011 (2011-12-31), pages 45 - 47 * |
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