CN115267600A - Split contact type cable leakage current monitor and monitoring method - Google Patents
Split contact type cable leakage current monitor and monitoring method Download PDFInfo
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Abstract
The invention relates to a split type contact type cable leakage current monitor and a monitoring method, and belongs to the technical field of electrical variable measurement. The monitoring instrument comprises a monitoring instrument for monitoring the leakage current of a cable, wherein a sensor group is arranged in the monitoring instrument, the monitoring instrument comprises a handheld part fixed on the side of the cable and a main body part arranged separately from the handheld part, the handheld part is used for monitoring a cable device in real time, and the main body part is plugged for analyzing and sorting monitoring data; the split type design is adopted, the handheld part and the main body part are separated, the requirements of more occasions can be met, the handheld part and the main body part can be nested to be used as an integral device, the handheld part and the main body part can be detached to be used, and the use is flexible and convenient; according to the invention, the leakage grade is assigned according to the leakage case statistical condition of the cable; and then, the provided leakage grade evolution algorithm is utilized to obtain the texture change rate, so that the identification requirement of cable leakage monitoring is met, and the monitoring effect is higher. The invention can be widely applied to the occasions of measuring electrical variables.
Description
Technical Field
The invention relates to a split type contact type cable leakage current monitor and a monitoring method, and belongs to the technical field of electrical variable measurement.
Background
In the prior art, cable current monitoring is basically provided with a handheld monitor, and the measurement has only the reference meaning at the time, and the data of the time lapse is useless. An on-line monitor is also adopted, the change trend of the leakage current of the cable can be monitored by 24-hour on-line monitoring all day, but if the leakage position is too much, a plurality of monitors are required to be equipped, and the whole set of cost is still higher.
In fact, in the prior art, when a plurality of on-line monitors are provided in the same area, many of the functions are repeated, such as current monitoring, and each device must be provided with a current collecting circuit of a small coil; in addition, the leakage current monitoring is generally voltage or current signals, and complex sensor monitoring and wireless data transmission are not actually needed, and the existing individual design obviously makes repeated redundancy of individual part design when a large whole set of system is formed. The single use needs complete functions, and the hardware cost is relatively high when the system is combined for use.
Disclosure of Invention
Aiming at the leakage in the prior art, the invention provides a split contact type cable leakage current monitor and a monitoring method, which can be assembled into a whole for use, and can also be arranged into split type multi-point distribution monitoring and then centralized and unified data processing, or the data is transmitted to an analyzer for analysis processing and on-line calibration.
The invention relates to a split type contact type cable leakage current monitor, which comprises a monitor for monitoring cable leakage current, wherein a sensor group is arranged in the monitor, the monitor comprises a handheld part fixed on a cable side and a main body part arranged separately from the handheld part, the handheld part is used for monitoring a cable device in real time, and the main body part is plugged for analyzing and sorting monitoring data, wherein:
the handheld part is arranged in a strip shape, one end of the handheld part is provided with a monitoring port sleeved with a cable, and a matched monitoring assembly is arranged below the monitoring port; the middle part of the hand-held part is provided with a socket I matched with the main body part; the monitoring assembly is in contact with the interface I through a data line;
the main part, including the shell that has the display to and through flexible subassembly complex control assembly, wherein:
the telescopic assembly comprises a telescopic rod, a sliding rail and a tray, the tray is provided with a control assembly, and the side part of the tray is connected to the shell through the sliding rail and moves back and forth relative to the shell; the front end of the tray is provided with a telescopic rod, the tail end of the telescopic rod is provided with a plug board, the plug board is butted with the handheld part, and a plug interface II on the plug board is matched with a plug interface I on the handheld part;
and the control assembly comprises a controller, a sensor group and a wireless module, the controller receives monitoring information of the interface II, and the information is transmitted to the analyzer through the wireless module by combining the information monitored by the sensor group.
Preferably, the monitoring assembly comprises a monitoring coil and a housing protecting the monitoring coil, wherein:
the monitoring coil can generate an alternating magnetic field around the monitoring coil under the action of alternating current, the alternating magnetic field acts on the electrified cable in real time, and the monitoring coil continuously scans and monitors whether the cable is abnormal or not in real time.
Preferably, the plugboard is positioned in the main body part when being contracted, the plugboard at the end part of the plugboard is butted to the handheld part when being expanded, and the data is ensured to be connected through the socket I and the socket II; the inner wall of the interface I is in contact connection with the surface of the interface II, and the width dimension of the interface II is larger than the maximum outer diameter of the interface I.
Preferably, the front end of the handheld part is bent downwards and is continuously bent backwards to horizontally extend to form a monitoring head, and a monitoring port which vertically penetrates through the semicircle is reserved on the monitoring head; the inner cavity of the hand-held part is provided with a plurality of reinforcing ribs.
Preferably, a through hole connected with the plug interface I is formed in the monitoring assembly; the monitoring assembly housing includes four side walls and a bottom, the side walls and the bottom forming a cavity adapted to receive the monitoring coil.
Preferably, the monitor is connected with the analyzer through a wireless module, the analyzer adopts a B/S architecture, and includes an information correction unit, a historical data storage unit, an information prediction unit, and a leakage level management unit, wherein:
the information correction unit is used for receiving the information collected by the sensing monitor, accurately issuing an early warning instruction by identifying the size of the leakage current in the information and ensuring that the sensing monitor accurately collects the information of the leakage current;
the historical data storage unit deletes the information that the size of the leakage current does not meet the requirement, retains the information which is collected and meets the requirement, and forms a collection set, thereby facilitating the subsequent prediction and management;
the information prediction unit is used for calling the historical data storage unit, predicting the change rate of the leakage current in the information and predicting the time used by the future leakage grade of the leakage current in combination with the evolution of time;
and the leakage grade management unit records all leakage grades of all leakage currents, forms corresponding characteristics and records the characteristics on an original picture, and is convenient for learning of a visual neural network.
The monitor of the invention has the beneficial effects that: the split type design is adopted, the handheld part and the main body part are separated, the requirements of more occasions can be met, the handheld part and the main body part can be nested to be used as an integral device, the handheld part and the main body part can be detached to be used, and the use is flexible and convenient; when the portable type multi-point hand-held instrument is used independently, one body part can be used for multiple purposes, namely, one body part is matched with a plurality of hand-held parts, wherein the hand-held parts are distributed in the same measuring area and are arranged in multiple points, and the hand-held parts are concentrated on one analyzer for summary operation, so that the overall cost investment of the monitor can be reduced; the monitoring equipment with complete functions can be assembled by directly inserting the interfaces oppositely, and the adaptability is strong; corresponding operation processing can be uniformly carried out on the analyzer, and an analysis module does not need to be arranged on each main body part; and the voltage of the same area is more suitable for one-driving-more scenes, low-cost monitoring arrangement is carried out, and the economical efficiency is good.
The invention discloses a monitoring method of a split type contact type cable leakage current monitor, which comprises the following steps:
s1: correcting and collecting the monitor: after the monitor collects information, the leakage current is corrected by the analyzer, and the corrected monitoring coil is obtained; the monitoring coil correction signal generation circuit corrects the acquisition channel to have different frequencies and gain characteristics, and the monitoring coil acquires a small coil output signal tightly coupled with the cable to provide phase reference for receiving so as to assist the normal work of monitoring parameters;
s2: preprocessing collected information: the sizes of leakage currents in the information acquired after correction are kept uniform, so that comparison with historical data is facilitated; firstly, fourier transform is carried out to obtain leakage current; determining a frequency band interval according to the sampling frequency and the sampling time of the leakage current information, and performing frequency band division on the leakage current frequency domain current according to the frequency band interval; extracting leakage current time domain characteristic quantity of the frequency band signal and extracting leakage current frequency domain characteristic quantity of the preprocessing information;
s3: quantitative analysis of historical information data: the method comprises the following steps of obtaining the change rate of leakage current by using the information change of the same cable in different historical periods, and predicting the accuracy of which leakage grade the cable belongs to in the information, namely:
the information collected by the analyzer records historical data of different leakage grades, the current evolution of a certain leakage grade to the current of the next leakage grade in the preprocessed information is determined, and after the current conforming to the leakage grade is captured, the evolution time of reference information is superposed, so that the leakage current change rate is obtained;
and S4, determining a leakage grade set: the analyzer performs segmentation processing on the information after quantitative analysis, further identifies one or more cables in the information, and sets one or more leakage grades for one or more leakage currents in the information; forming a collection of one or more leakage levels for training a neural network that evaluates information leakage levels; and forming one or more characteristics of the leakage level based on the neural network, and annotating the characteristics on the related information.
Preferably, in the step S3, the historical information data is quantitatively analyzed, the leakage grades are classified, and the calculation of weighted average assignment is performed respectively; and meanwhile, the leakage grade is assigned according to the leakage case statistical condition of the cable, and the accounting of the leakage grade of one cable is realized according to the following formula:
in the formula: roCGeneral assemblyFor the value of the total leakage level of the entire cable,
for the summation of the values of the aging leakage levels,
for the summation of the values of the poor contact leakage levels,
for the summation of values of fracture leakage levels,
summing the leak level values for the failed case;
alpha is an aging leakage factor determination value, beta is a poor contact leakage factor determination value, and gamma is a fracture leakage factor determination value;
n is the number of factors in the single cable leakage comprehensive consideration factor classification.
The method of the invention has the beneficial effects that: according to the method, the frequency band division is firstly carried out on the leakage current frequency domain current by utilizing Fourier transform; then extracting the leakage current time domain characteristic quantity of the frequency band signal, and extracting the leakage current frequency domain characteristic quantity of the preprocessing information; then, assigning a leakage grade according to the leakage case statistical condition of the cable; then, obtaining the texture change rate by using the proposed leakage grade evolution algorithm; finally, obtaining a collection formed by one or more leakage grades by using historical image data, and finally using the collection as a training model of the neural network; the whole method is different from the existing training mode, the identification requirement of cable leakage monitoring is met better, and the monitoring effect is higher.
Drawings
FIG. 1 is a schematic view of the monitor of the present invention.
Fig. 2 is a schematic structural view of the hand-held portion.
Fig. 3 is a schematic view of the monitoring assembly.
Fig. 4 is a schematic structural view of the main body portion.
Fig. 5 is an electrical connection diagram of the monitor and analyzer.
Fig. 6 is a block diagram of the monitor and analyzer connections.
Fig. 7 is an electrical connection diagram of the monitor.
FIG. 8 is a flow diagram of the method of the present invention.
In the figure: 1. a hand-held portion; 2. an inserting port I; 3. a monitoring port; 4. a monitoring component; 41. monitoring the coil; 42. a housing; 5. a main body portion; 6. a telescopic rod; 7. a display; 8. a control component; 9. a slide rail; 10. a plugboard; 11. a plug interface II; 12. an analyzer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example 1:
as shown in fig. 1, the split contact type cable leakage current monitor comprises a monitor for monitoring cable leakage current, a sensor group is arranged in the monitor, the monitor comprises a handheld portion 1 fixed on a cable side and a main body portion 5 arranged separately from the handheld portion 1, the handheld portion 1 is used for monitoring a cable device in real time, and the main body portion 5 is plugged to analyze and arrange monitoring data, wherein:
as shown in fig. 2, the handheld portion 1 is arranged in a strip shape, one end of the handheld portion is provided with a monitoring port 3 which is sleeved with a cable, and a matched monitoring assembly 4 is arranged below the monitoring port 3; the middle part of the hand-held part 1 is provided with a socket I2 matched with the main body part 5; the monitoring component 4 is in contact with the interface I2 through a data line.
As shown in fig. 3, the monitoring assembly 4 includes a monitoring coil 41 and a housing 42 protecting the monitoring coil 41, wherein:
the monitoring coil 41 generates an alternating magnetic field around the monitoring coil under the action of the alternating current, and the alternating magnetic field acts on the electrified cable in real time to continuously scan and monitor whether the cable is abnormal or not in real time.
As shown in fig. 4, the main body 5, comprises a housing with a display 7, and a control assembly 8 cooperating through a telescopic assembly, wherein:
the telescopic assembly comprises a telescopic rod 6, a sliding rail 9 and a tray, the tray is provided with a control assembly 8, and the side part of the tray is connected to the shell through the sliding rail 9 and moves back and forth relative to the shell; the front end of the tray is provided with a telescopic rod 6, the tail end of the telescopic rod 6 is provided with a plug board 10, the plug board 10 is butted with the handheld part 1, and a plug port II 11 on the plug board 10 is matched with a plug port I2 of the handheld part 1;
and the control component 8 comprises a controller, a sensor group and a wireless module, the controller receives monitoring information of the interface II 11, and the information is transmitted to the analyzer 12 through the wireless module by combining the information monitored by the sensor group, as shown in fig. 5 and 6.
Preferably, the plugboard 10 is located in the main body part 5 when being contracted, the plugboard 10 at the end part of the plugboard is butted to the handheld part 1 when being expanded, and the data is ensured to be connected through the plugboard I2 and the plugboard II 11; the inner wall of interface I2 is connected with interface II 11's surface contact, and interface II 11's width dimension is greater than interface I2's the biggest external diameter.
Preferably, the front end of the handheld part 1 is bent downwards and is continuously bent backwards to horizontally extend to be provided with a monitoring head, and a monitoring port 3 which vertically penetrates through a semicircle is reserved on the monitoring head; the inner cavity of the hand-held part 1 is provided with a plurality of reinforcing ribs.
Preferably, a through hole connected with the plug interface I2 is formed in the monitoring component 4; the housing 42 of the monitoring assembly 4 comprises four side walls and a bottom, the side walls and the bottom forming a cavity suitable for placing the monitoring coil 41.
As shown in fig. 7, the monitor is connected to the analyzer 12 through a wireless module, the analyzer 12 adopts a B/S architecture, and includes an information correction unit, a historical data storage unit, an information prediction unit, and a leakage level management unit, wherein:
the information correction unit is used for receiving the information collected by the sensing monitor, accurately issuing an early warning instruction by identifying the size of the leakage current in the information and ensuring that the sensing monitor accurately collects the information of the leakage current;
the historical data storage unit deletes the information that the size of the leakage current does not meet the requirement, retains the information which is collected and meets the requirement, and forms a collection set, thereby facilitating the subsequent prediction and management;
the information prediction unit is used for calling the historical data storage unit, predicting the change rate of the leakage current in the information and predicting the time used by the future leakage grade of the leakage current in combination with the evolution of time;
and the leakage grade management unit is used for recording all leakage grades of all leakage currents, forming corresponding characteristics and recording the characteristics on an original picture, so that the learning of a visual neural network is facilitated.
The monitor is divided into the handheld part 1 and the main body part 5 through a split type design, so that the requirements of more occasions can be met, the monitor can be nested and used as an integral device, also can be detached for use, and is flexible and convenient to use; when the portable type monitoring instrument is used independently, one-to-many operation can be realized, namely, one main body part 5 is matched with a plurality of handheld parts 1, wherein the handheld parts 1 are distributed in the same measuring area and are arranged in multiple points, and the operation is centralized on one analyzer 12, so that the overall cost investment of the monitoring instrument can be reduced; the monitoring equipment with complete functions can be assembled by directly inserting the interfaces oppositely, and the adaptability is strong; corresponding operation processing can be uniformly carried out on the analyzer 12, and an analysis module does not need to be arranged on each main body part 5; and the voltage of the same area is more suitable for one-driving-more scenes, low-cost monitoring arrangement is carried out, and the economical efficiency is good.
Example 2:
as shown in fig. 8, the monitoring method of the split contact type cable leakage current monitor of the present invention includes the following steps:
s1: correcting and collecting the monitor: the monitor collects information and then carries out leakage current size correction through the analyzer 12, and a corrected monitoring coil 41; the monitoring coil 41 correction signal generation circuit corrects the acquisition channel to have different frequency and gain characteristics, and the monitoring coil 41 acquires a small coil output signal tightly coupled with the cable to provide phase reference for receiving so as to assist the normal work of monitoring parameters;
s2: preprocessing collected information: the sizes of leakage currents in the information collected after correction are kept uniform, so that comparison with historical data is facilitated; firstly, fourier transform is carried out to obtain leakage current; determining a frequency band interval according to the sampling frequency and the sampling time of the leakage current information, and performing frequency band division on the leakage current frequency domain current according to the frequency band interval; extracting leakage current time domain characteristic quantity of the frequency band signal and extracting leakage current frequency domain characteristic quantity of the preprocessing information;
s3: quantitative analysis of historical information data: the information change of the same cable in different historical periods is utilized to obtain the change rate of the leakage current, and the accuracy of which leakage grade the cable belongs to in the information is predicted, namely:
the information acquired by the analyzer 12 records historical data of different leakage levels, and it is determined that the current in a certain leakage level evolves into the current in the next leakage level in the preprocessed information, and after the current in accordance with the leakage level is captured, the evolution time of the reference information is superposed, so that the leakage current change rate is obtained;
and S4, determining a leakage grade set: the analyzer 12 performs segmentation processing on the information after quantitative analysis, further identifies one or more cables in the information, and sets one or more leakage levels for one or more leakage currents in the information; forming a collection of one or more leakage levels for training a neural network that evaluates information leakage levels; and forming one or more characteristics of the leakage level based on the neural network, and annotating the characteristics on the related information.
Preferably, in the step S3, the historical information data is quantitatively analyzed, the leakage grades are classified, and the calculation of weighted average assignment is performed respectively; and meanwhile, the leakage grade is assigned according to the leakage case statistical condition of the cable, and the accounting of the leakage grade of one cable is realized according to the following formula:
in the formula: roCGeneral assemblyFor the total leakage level value of the entire cable,
for the summation of the values of the aging leakage levels,
for the summation of the values of the bad contact leakage levels,
for the summation of values of fracture leakage levels,
summing the leak level values for the failure cases;
alpha is an aging leakage factor determination value, beta is a poor contact leakage factor determination value, and gamma is a fracture leakage factor determination value;
n is the number of factors in the single cable leakage comprehensive consideration factor classification.
According to the method, the frequency band division is firstly carried out on the leakage current frequency domain current by utilizing Fourier transform; then extracting leakage current time domain characteristic quantity of the frequency band signal, and extracting leakage current frequency domain characteristic quantity of the preprocessing information; then, assigning a leakage grade according to the leakage case statistical condition of the cable; then, obtaining the texture change rate by using the proposed leakage grade evolution algorithm; finally, obtaining a collection formed by one or more leakage grades by using historical image data, and finally using the collection as a training model of the neural network; the whole method is different from the existing training mode, the identification requirement of cable leakage monitoring is met better, and the monitoring effect is higher.
The invention can be widely applied to the occasions of measuring electrical variables.
Claims (8)
1. The utility model provides a split type contact type cable leakage current monitor, is including the monitor that is used for monitoring cable leakage current, and the monitor embeds there is sensor group, its characterized in that, and the monitor is including fixing handheld portion (1) in the cable side and main part (5) that set up with handheld portion (1) components of a whole that can function independently, and handheld portion (1) is used for real-time supervision cable assembly, and main part (5) monitor data analysis arrangement, wherein on pegging graft:
the handheld part (1) is arranged in a strip shape, one end of the handheld part is provided with a monitoring port (3) sleeved with a cable, and a matched monitoring assembly (4) is arranged below the monitoring port (3); the middle part of the hand-held part (1) is provided with a socket I (2) matched with the main body part (5); the monitoring component (4) is in contact with the interface I (2) through a data line;
a main body portion (5) comprising a housing with a display (7), and a control assembly (8) cooperating through a telescopic assembly, wherein:
the telescopic assembly comprises a telescopic rod (6), a sliding rail (9) and a tray, a control assembly (8) is mounted on the tray, and the side part of the tray is connected to the shell through the sliding rail (9) and moves back and forth relative to the shell; the front end of the tray is provided with a telescopic rod (6), the tail end of the telescopic rod (6) is provided with a plug board (10), the plug board (10) is butted with the handheld part (1), and a plug interface II (11) on the plug board (10) is matched with a plug interface I (2) of the handheld part (1);
and the control assembly (8) comprises a controller, a sensor group and a wireless module, the controller receives monitoring information of the interface II (11), and the information is transmitted to the analyzer (12) through the wireless module by combining the information monitored by the sensor group.
2. The split contact type cable leakage current monitor according to claim 1, wherein the monitoring assembly (4) comprises a monitoring coil (41) and a housing (42) protecting the monitoring coil (41), wherein:
the monitoring coil (41) can generate an alternating magnetic field around the monitoring coil under the action of the alternating current, the alternating magnetic field acts on the electrified cable in real time, and the monitoring coil continuously scans and monitors whether the cable is abnormal or not in real time.
3. The split contact type cable leakage current monitor according to claim 1, wherein the plugboard (10) is located in the main body portion (5) when retracted, the plugboard (10) at the end portion thereof is butted to the handheld portion (1) when extended, and data connection is ensured through the socket i (2) and the socket ii (11); the inner wall of the interface I (2) is in contact connection with the surface of the interface II (11), and the width dimension of the interface II (11) is larger than the maximum outer diameter of the interface I (2).
4. The split contact type cable leakage current monitor according to claim 1, wherein the front end of the hand-held part (1) is bent downwards and is continuously bent backwards to horizontally extend to form a monitoring head, and a monitoring port (3) which vertically penetrates through a semicircle is reserved on the monitoring head; the inner cavity of the hand-held part (1) is provided with a plurality of reinforcing ribs.
5. The split contact type cable leakage current monitor according to claim 1 or 2, wherein the monitoring assembly (4) is provided with a through hole for connecting the plug interface i (2); the housing (42) of the monitoring assembly (4) comprises four side walls and a bottom, the side walls and the bottom forming a cavity suitable for placing the monitoring coil (41).
6. The split contact type cable leakage current monitor according to claim 1, wherein the monitor is connected to the analyzer (12) via a wireless module, the analyzer (12) adopts a B/S architecture, and comprises an information correction unit, a historical data storage unit, an information prediction unit, and a leakage level management unit, wherein:
the information correction unit is used for receiving the information collected by the sensing monitor, accurately issuing an early warning instruction by identifying the size of the leakage current in the information and ensuring that the sensing monitor accurately collects the information of the leakage current;
the historical data storage unit deletes the information that the size of the leakage current does not meet the requirement, retains the information which is collected and meets the requirement, and forms a collection set, thereby facilitating the subsequent prediction and management;
the information prediction unit is used for calling the historical data storage unit, predicting the change rate of the leakage current in the information and predicting the time used by the future leakage grade of the leakage current by combining the evolution on time;
and the leakage grade management unit is used for recording all leakage grades of all leakage currents, forming corresponding characteristics and recording the characteristics on an original picture, so that the learning of a visual neural network is facilitated.
7. A method for monitoring a split contact type cable leakage current monitor according to any one of claims 1 to 6, comprising the steps of:
s1: correcting and collecting the monitor: the monitor collects information and then carries out leakage current size correction through the analyzer (12), and the corrected monitoring coil (41); the monitoring coil (41) is used for correcting the characteristics of the acquisition channel at different frequencies and gains by the correction signal generating circuit, and the monitoring coil (41) is used for acquiring a small coil output signal tightly coupled with the cable, so as to provide phase reference for receiving and assist the normal work of monitoring parameters;
s2: preprocessing collected information: the sizes of leakage currents in the information collected after correction are kept uniform, so that comparison with historical data is facilitated; firstly, fourier transform is carried out to obtain leakage current; determining a frequency band interval according to the sampling frequency and the sampling time of the leakage current information, and performing frequency band division on the leakage current frequency domain current according to the frequency band interval; extracting leakage current time domain characteristic quantity of the frequency band signal and extracting leakage current frequency domain characteristic quantity of the preprocessing information;
s3: quantitative analysis of historical information data: the method comprises the following steps of obtaining the change rate of leakage current by using the information change of the same cable in different historical periods, and predicting the accuracy of which leakage grade the cable belongs to in the information, namely:
the information collected by the analyzer (12) records historical data of different leakage grades, the current evolution of a certain leakage grade to the current of the next leakage grade in the preprocessed information is determined, and after the current conforming to the leakage grade is captured, the evolution time of reference information is superposed, so that the leakage current change rate is obtained;
and S4, determining a leakage grade set: the analyzer (12) performs segmentation processing on the information after quantitative analysis, further identifies one or more cables in the information, and sets one or more leakage grades for one or more leakage currents on the information; forming a collection of one or more leakage levels for training a neural network that evaluates information leakage levels; and forming one or more characteristics of the leakage level based on the neural network, and annotating the characteristics on the related information.
8. The split contact type cable leakage current monitor and monitoring method according to claim 7, wherein the historical information data in step S3 is quantitatively analyzed, the leakage grades are classified, and the calculation of weighted average assignment is performed respectively; and meanwhile, the leakage grade is assigned according to the leakage case statistical condition of the cable, and the accounting of the leakage grade of one cable is realized according to the following formula:
in the formula: roCGeneral assemblyFor the total leakage level value of the entire cable,
for the summation of the values of the aging leakage levels,
for the summation of the values of the poor contact leakage levels,
for the summation of values of fracture leakage levels,
summing the leak level values for the failed case;
alpha is an aging leakage factor judgment value, beta is a poor contact leakage factor judgment value, and gamma is a fracture leakage factor judgment value; n is the number of factors in the single cable leakage comprehensive consideration factor classification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210889114.0A CN115267600B (en) | 2022-07-27 | 2022-07-27 | Split contact type cable leakage current monitor and monitoring method |
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| CN202210889114.0A CN115267600B (en) | 2022-07-27 | 2022-07-27 | Split contact type cable leakage current monitor and monitoring method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553206A (en) * | 2003-12-18 | 2004-12-08 | 西安交通大学 | Electric power apparatus external insulative leakage current on-line monitoring system in converting station |
| KR20110067997A (en) * | 2009-12-15 | 2011-06-22 | 한국전력공사 | Leakage current monitoring system for voltage distribution line based on amr network and driving method thereof |
| CN102262175A (en) * | 2011-04-29 | 2011-11-30 | 嘉兴市永信电子有限公司 | Split creepage information acquisition device |
| CN105548739A (en) * | 2015-12-04 | 2016-05-04 | 江苏省电力公司宿迁供电公司 | Processing method of running state signal of arrester |
| CN206515758U (en) * | 2017-01-16 | 2017-09-22 | 东莞立华海威网联科技有限公司 | Server with guide tracked connected structure |
| KR101990930B1 (en) * | 2018-06-28 | 2019-06-19 | 주식회사 비츠로이엠 | Arrester equipped with apparatus for monitoring a status |
| CN215599597U (en) * | 2021-08-03 | 2022-01-21 | 深圳市研为科技有限公司 | Fan-free industrial control computer with modularized detachable mainboard |
| CN216209265U (en) * | 2021-07-01 | 2022-04-05 | 国网上海市电力公司 | Distributed cable circulating current monitoring device and system |
-
2022
- 2022-07-27 CN CN202210889114.0A patent/CN115267600B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553206A (en) * | 2003-12-18 | 2004-12-08 | 西安交通大学 | Electric power apparatus external insulative leakage current on-line monitoring system in converting station |
| KR20110067997A (en) * | 2009-12-15 | 2011-06-22 | 한국전력공사 | Leakage current monitoring system for voltage distribution line based on amr network and driving method thereof |
| CN102262175A (en) * | 2011-04-29 | 2011-11-30 | 嘉兴市永信电子有限公司 | Split creepage information acquisition device |
| CN105548739A (en) * | 2015-12-04 | 2016-05-04 | 江苏省电力公司宿迁供电公司 | Processing method of running state signal of arrester |
| CN206515758U (en) * | 2017-01-16 | 2017-09-22 | 东莞立华海威网联科技有限公司 | Server with guide tracked connected structure |
| KR101990930B1 (en) * | 2018-06-28 | 2019-06-19 | 주식회사 비츠로이엠 | Arrester equipped with apparatus for monitoring a status |
| CN216209265U (en) * | 2021-07-01 | 2022-04-05 | 国网上海市电力公司 | Distributed cable circulating current monitoring device and system |
| CN215599597U (en) * | 2021-08-03 | 2022-01-21 | 深圳市研为科技有限公司 | Fan-free industrial control computer with modularized detachable mainboard |
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