CN115343583A - Cable joint on-line monitoring analytical equipment based on multisensor fuses - Google Patents
Cable joint on-line monitoring analytical equipment based on multisensor fuses Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/004—CO or CO2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0042—SO2 or SO3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0044—Sulphides, e.g. H2S
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- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention provides a cable joint on-line monitoring and analyzing device based on multi-sensor fusion, which relates to the technical field of cable joint monitoring and comprises a main control module, a first temperature sensor, a humidity sensor, a water level sensor, a first gas sensor (a four-in-one gas detector adopting sulfur monoxide, sulfur dioxide, sulfur trioxide and hydrogen sulfide), a second temperature sensor, a high-frequency current sensor, a second gas sensor and an image sensor; the analysis module comprises a threshold setting submodule, an image recognition submodule, an abnormity judgment submodule and an abnormity warning submodule. The method can adapt to the cable joint which generally uses vulcanized rubber as an insulating material at present by performing targeted monitoring on the gas generated by aging and decomposition of the cable joint, ensure the general adaptability, predict the aging of the cable joint in advance, prevent the cable joint from being in an unsafe operation state, reduce accident potential and avoid the possibility of accident risk of the cable joint.
Description
Technical Field
The invention relates to a cable joint on-line monitoring and analyzing device based on multi-sensor fusion, and belongs to the technical field of cable joint monitoring.
Background
At present, the application of new energy power grids is more extensive, and the fault of a cable can not only cause a large amount of electric energy loss in the using process, but also seriously affect the normal work of electrical equipment, even cause fire and electric shock accidents, and cause inestimable loss. In a power cable line, a cable joint is the weakest link for safe operation of a power system, and the cable joint is also the weakest link for fault occurrence parts and cable insulation while bearing operation tasks. The overheating of the cable joint can cause the disconnection, short circuit, explosion and even serious fire accidents of the cable. The process from overheating of the cable joint to the occurrence of a fire accident is a slow and long-time process.
For this reason, after the cable is put into use, special attention is required and the state of the cable joint is monitored for health (normality) to prevent occurrence of an accident. If an application number is 201810301089.3, which is named as 'a method and a system for diagnosing the health of a cable joint', the method and the system mainly comprise three parts, namely temperature diagnosis, partial discharge diagnosis and chloride diagnosis, the method and the system judge whether the cable joint has a partial discharge phenomenon or not by measuring the running temperature of the cable joint in real time and collecting ultrasonic waves generated during partial discharge, and analyze the aging degree of an outer sleeve of the cable joint by detecting a decomposed product of a cable; the health of the cable joint is diagnosed and processed according to the results of temperature detection, partial discharge detection, chloride detection and the like, the health condition of the cable joint is analyzed and recorded, the insulation condition of the cable joint is predicted, and the probability of accidents of the cable joint is reduced. However, the cable/cable joint which generally adopts the PVC material as the insulating material generates chloride after decomposition, but at present, many cable joints which are not the PVC material as the insulating material appear, and because the cable joints are used as key components in a cable transmission system, the improvement of the voltage grade, the capacity and the length also has higher requirements on the structure and the material performance of the cable joints. Wherein, the insulation reliability of the cable joint is directly related to the safe operation of the power system. Therefore, the insulating material of the cable joint is gradually converted into an insulating rubber material (especially vulcanized rubber) from common PVC plastics, and even a new material with better insulating property is developed, for example, the name of '202011502890.8' is 'an insulating material for the cable joint and a preparation method thereof', and the material mainly comprises ethylene propylene diene monomer, silicon rubber, siO2 nano particles modified by a coupling agent, znO nano particles modified by the coupling agent, a vulcanizing agent and the like. The insulating rubber material and the new material do not generate chloride but generate carbon dioxide, sulfur trioxide, nitric oxide, hydrogen sulfide and the like after aging and decomposition. Therefore, the above-mentioned prior art "a method and system for diagnosing the health of a cable joint" is not well suited for the cable joint using rubber as an insulating material.
In addition, the prior art provides a more perfect scheme than the prior art "a method and a system for diagnosing the health of the cable joint", for example, an application number of 202022438627.9 "named" a cable duct environment and cable joint real-time monitoring device ", which mainly comprises a host, an environment monitoring part and a cable joint monitoring part; the environment monitoring part comprises a temperature and humidity sensor for monitoring environment temperature and humidity, a water level sensor for monitoring the water level of the cable trench and a gas sensor for monitoring harmful gas; the cable joint monitoring part comprises a temperature sensor for monitoring the temperature of the cable joint, a high-frequency sensor for monitoring the aging degree of the cable joint, and a vibration sensor for monitoring the vibration frequency of the cable and preventing external damage and cable theft. The aging degree of the cable joint is judged by adopting a high-frequency sensor and collecting the discharge frequency through partial discharge. However, such determination is generally delayed, in other words, once the cable joint generates the partial discharge phenomenon, it is said that the aging degree of the cable joint is very serious, the accident may occur at any time, and the cable joint is in an unsafe state, in other words, the monitoring device thereof still cannot ensure the safe and reliable operation of the cable.
The present application was made based on this.
Disclosure of Invention
Aiming at the defects in the background technology, the invention provides the on-line monitoring and analyzing device for the cable joint based on the multi-sensor fusion, so that the aging of the cable joint is predicted in advance and is not aged to the partial discharge degree, the cable joint is prevented from being in an unsafe operation state, the accident potential is reduced, and the possibility that the cable joint has accident risks is avoided.
In order to achieve the purpose, the technical solution of the invention is as follows:
a cable joint on-line monitoring and analyzing device based on multi-sensor fusion comprises a main control module, an environment monitoring module electrically connected with the main control module, and a cable joint monitoring module electrically connected with the main control module; the environment monitoring module comprises a first temperature sensor for monitoring the environment temperature of the cable well, a humidity sensor for monitoring the environment humidity of the cable well, a water level sensor for monitoring the water level of the cable well and a first gas sensor for monitoring toxic and harmful gases; the cable joint monitoring module is positioned at the cable joint and comprises a second temperature sensor for monitoring the temperature of the cable joint and a high-frequency current sensor for monitoring partial discharge of the cable joint, and the cable joint monitoring module also comprises a second gas sensor for detecting gas generated by aging and decomposition of an insulating layer of the cable joint and an image sensor for acquiring the appearance of the cable joint; the online monitoring and analyzing device also comprises an analyzing module in communication connection with the main control module; the environment monitoring module and the cable joint monitoring module respectively convert and process the environment temperature, the environment humidity, the water level, the environment toxic and harmful gas, the cable joint temperature, the pulse signal of local discharge, the aging decomposition gas and the cable joint appearance image data obtained from each sensor and then transmit the data to the analysis module; and the analysis module analyzes the data to obtain a result, sends the result to the monitoring terminal and gives an alarm for abnormal conditions.
In order to adapt to the cable joint which generally uses rubber as an insulating material at present, the invention provides a preferable scheme, and the second gas sensor adopts a sulfur monoxide, sulfur dioxide, sulfur trioxide and hydrogen sulfide four-in-one gas detector. The vulcanized rubber can generate the gas after being heated and decomposed, and the gas detector can be used for judging whether the rubber starts to age gradually or not, so that the risk can be predicted in advance.
In order to further predict the state of the insulating layer of the cable joint in advance, the invention provides a preferable scheme that the analysis module comprises
The threshold setting submodule is used for respectively setting thresholds for the ambient temperature, the ambient humidity, the water level, the toxic and harmful gases in the environment and the temperature of the cable connector;
the image identification submodule is used for identifying the acquired cable joint appearance image and comparing the acquired cable joint appearance image with an image when the cable joint is put into use to judge whether the acquired cable joint appearance image is matched with the image;
the abnormity judgment submodule is used for respectively comparing the environmental temperature, the environmental humidity, the water level, the environmental toxic and harmful gas and the cable joint temperature data obtained by real-time monitoring with respective corresponding threshold values, judging the data which do not exceed the threshold values as normal, and judging the data which exceed the threshold values as abnormal;
determining the partial discharge as abnormal when the pulse signal of the partial discharge is monitored;
judging the condition of the aging decomposition gas as abnormal;
judging the appearance image of the cable joint which is identified to be unmatched as abnormal;
and the abnormity warning submodule is used for carrying out abnormity warning on the monitoring terminal when the abnormity is judged, and displaying the abnormity information.
In order to distinguish the abnormal emergency degree and avoid accidents, the invention provides a preferable scheme, and the analysis module also comprises
The priority setting sub-module is used for sequentially setting priorities for environment temperature abnormity, environment humidity abnormity, water level abnormity, environment toxic and harmful gas abnormity, cable joint temperature abnormity, pulse signal abnormity of partial discharge, aging decomposition gas abnormity and cable joint appearance image abnormity; and the abnormity warning submodule carries out abnormity warning to the monitoring terminal from high to low according to the priority when the abnormity is judged, and displays abnormity information.
In order to prevent the device from being excessively sensitive when the reliability of the device is ensured, the invention provides a preferable scheme, wherein the monitoring terminal is provided with a manual intervention module for judging the received abnormal alarm, judging whether the abnormality is accurate or tolerable, carrying out 'exception handling' operation on the accurate and intolerable abnormality, carrying out 'exception tolerance' operation on the accurate and tolerable abnormality, carrying out 'exception rejection' operation on the inaccurate abnormality and respectively feeding back the operation to the analysis module.
In order to further improve the intellectualization and the reliability of the monitoring device, the invention provides a preferable scheme, the analysis module also comprises a fault-tolerant error correction sub-module which marks the 'abnormal refusal' fed back by the monitoring terminal and converts the abnormal situation into 'normal'; and marking the 'abnormal tolerance' fed back by the monitoring terminal, converting the abnormal condition into 'normal', and realizing fault tolerance and error correction.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) The device disclosed by the invention can adapt to the cable joint which generally uses rubber (especially vulcanized rubber) as an insulating material at present by carrying out targeted monitoring on the gas generated by aging and decomposition at the cable joint, so that the universal adaptability is ensured, meanwhile, the aging of the cable joint can be predicted in advance by monitoring the aging and decomposition gas, the aging is not aged to the partial discharge degree, the cable joint is prevented from being in an unsafe operation state, the accident potential is reduced, and the possibility that the cable joint has the accident risk is avoided.
(2) The device provided by the invention combines the image sensor for collecting the appearance of the cable joint and the second gas sensor for detecting the decomposition of the vulcanized rubber insulating material of the cable joint, so that whether the cable joint is abnormal or not can be judged more accurately in advance; meanwhile, the sensors of various types are identified and judged from different dimensions, and data can be mutually verified; in addition, when other sensors fail, the remaining sensors can also function, and the reliability of the whole monitoring device can be improved.
(3) The device has higher intelligent degree, can give an alarm according to the importance degree and the emergency degree of different types of abnormities, is added with a manual intervention module and a fault-tolerant error correction mechanism, ensures the reliability of the device, and simultaneously can prevent the device from being influenced by the over-sensitive abnormal alarm, so that the monitoring device is more flexible, intelligent and reliable.
Drawings
FIG. 1 is a block diagram of an on-line monitoring and analyzing device for a cable joint based on multi-sensor fusion in example 1;
FIG. 2 is a block diagram of an on-line monitoring and analyzing device for a cable joint based on multi-sensor fusion in example 2.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in conjunction with the accompanying drawings to make it clear to those skilled in the art how to practice the present invention. While the invention has been described in connection with preferred embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the scope of the invention.
Example 1
As shown in fig. 1, the on-line monitoring and analyzing device for a cable joint based on multi-sensor fusion of the present embodiment includes a main control module, an environment monitoring module electrically connected to the main control module, a cable joint monitoring module electrically connected to the main control module, and an analyzing module communicatively connected to the main control module;
the environment monitoring module comprises a first temperature sensor (used for monitoring the environmental temperature of the cable well), a humidity sensor (used for monitoring the environmental humidity of the cable well), a water level sensor (used for monitoring the water level of the cable well) and a first gas sensor (used for monitoring toxic and harmful gases);
the cable joint monitoring module is positioned at the cable joint and comprises a second temperature sensor (used for monitoring the temperature of the cable joint), a high-frequency current sensor (used for monitoring the partial discharge of the cable joint), a second gas sensor (used for detecting gas generated by aging and decomposition of an insulating layer of the cable joint) and an image sensor (used for acquiring the appearance of the cable joint); in example 1, the second gas sensor employs a four-in-one gas detector of sulfur monoxide, sulfur dioxide, sulfur trioxide, and hydrogen sulfide. Vulcanized rubber can produce above-mentioned gas after being heated and decomposed, can adapt to the cable joint who generally uses rubber as insulating material at present through this gas detection appearance, can judge whether rubber has begun ageing gradually, can foresee the risk in advance.
The environment monitoring module and the cable joint monitoring module respectively convert and process the environment temperature, the environment humidity, the water level, the environment toxic and harmful gas, the cable joint temperature, the pulse signal of partial discharge, the aging decomposition gas and the cable joint appearance image data obtained from each sensor and then transmit the data to the analysis module; the analysis module analyzes the data to obtain a result, sends the result to the monitoring terminal and gives an alarm for abnormal conditions.
In embodiment 1, the analysis module includes a threshold setting sub-module, an image recognition sub-module, an abnormality determination sub-module, and an abnormality warning sub-module. Wherein
The threshold setting submodule is used for respectively setting thresholds for the ambient temperature, the ambient humidity, the water level, the toxic and harmful gases in the environment and the temperature of the cable connector;
the image identification submodule is used for identifying the acquired cable joint appearance image and comparing the acquired cable joint appearance image with an image when the cable joint is put into use to judge whether the acquired cable joint appearance image is matched with the image; the parameters for identification and comparison comprise whether the appearance of the cable joint is complete, whether the color is uniform, whether the glossiness is consistent or not, or whether an invisible point/line/surface exists or not, and the cable joint is judged to be not matched when the appearance is incomplete, the color is not uniform, the glossiness is inconsistent, and the invisible point/line/surface exists. And the identification is carried out from multiple dimensions, omission is avoided as much as possible, and the reliability of image identification is improved.
And the abnormity judgment submodule is used for respectively comparing the environmental temperature, the environmental humidity, the water level, the environmental toxic and harmful gas and the cable joint temperature data obtained by real-time monitoring with respective corresponding threshold values, judging that the data which do not exceed the threshold values are normal, and judging that the data which exceed the threshold values are abnormal. In consideration of the fact that underground water in the hoistway is mostly a humid environment, the water level and humidity affect the presence of high-voltage cables inside, and therefore special attention is needed. At the same time, the ambient temperature is also a very important influencing factor. However, these parameters can tolerate a certain amount, so the present embodiment sets a threshold value, and as long as these parameters are within the specified threshold value, the cable joint is in a normal operating state.
Determining the partial discharge as abnormal when monitoring the pulse signal of the partial discharge; judging the condition of the aging decomposition gas as abnormal; and judging the appearance image of the cable joint with unmatched identification as abnormal. Considering that once the cable joint is aged and decomposed or the appearance of the cable joint is greatly changed, the risk of possible accidents is shown, and once the cable joint is monitored, the cable joint is judged to be abnormal, the aging of the cable joint can be further predicted in advance, the cable joint is not aged to the partial discharge degree, the cable joint is prevented from being in an unsafe operation state, the accident potential is reduced, and the possibility that the cable joint has the accident risk is avoided. Of course, the monitoring and early warning of the partial discharge can be carried out, and the monitoring and early warning device can be used as a pocket bottom to prevent accidents in time.
And the abnormity warning submodule is used for carrying out abnormity warning on the monitoring terminal when the abnormity is judged, and displaying the abnormity information. Through the mode of reporting an emergency and asking for help or increased vigilance, can make the staff in time know the unusual of cable joint operation.
Compared with the prior art, the embodiment further combines the image sensor who adopts the appearance that is used for gathering the cable joint and the second gas sensor who is used for detecting the decomposition of cable joint vulcanized rubber insulating material, can judge in advance and accurately whether cable joint exists unusually, simultaneously, the sensor of multiple different grade type discerns the judgement from different dimensions, and data can the mutual evidences, in addition, when other sensors became invalid, the surplus sensor also can play a role, can improve whole monitoring devices' reliability.
Example 2
Example 2 includes all of the sensors, modules and sub-modules of example 1, namely including: the system comprises a main control module, an environment monitoring module, a cable joint monitoring module and an analysis module; the environment monitoring module comprises a first temperature sensor, a humidity sensor, a water level sensor and a first gas sensor (a four-in-one gas detector adopting sulfur monoxide, sulfur dioxide, sulfur trioxide and hydrogen sulfide); the cable joint monitoring module comprises a second temperature sensor, a high-frequency current sensor, a second gas sensor and an image sensor; the analysis module comprises a threshold setting submodule, an image recognition submodule, an abnormity judgment submodule and an abnormity warning submodule. However, the embodiment 2 as a more preferable embodiment has the following different technical features compared with the embodiment 1:
as shown in fig. 2, first, the analysis module of embodiment 2 further includes a priority setting sub-module, which is configured to set priorities for environment temperature abnormality, environment humidity abnormality, water level abnormality, environment toxic and harmful gas abnormality, cable joint temperature abnormality, pulse signal abnormality of partial discharge, aging decomposition gas abnormality, and cable joint appearance image abnormality in sequence; and the abnormity warning submodule carries out abnormity warning to the monitoring terminal from high to low according to the priority when the abnormity is judged, and displays abnormity information. The priority setting module is added to distinguish abnormal emergency degree, alarm can be given according to importance and emergency degree, and the monitoring device is more flexible, intelligent and reliable.
Secondly, in embodiment 2, a manual intervention module is provided at the monitoring terminal for determining the received abnormal alarm, determining whether the abnormality is accurate or tolerable, performing an "abnormality handling" operation on the accurate and intolerable abnormality, performing an "abnormality tolerance" operation on the accurate and tolerable abnormality, performing an "abnormality refute" operation on the inaccurate abnormality, and feeding back the "abnormality refute" operation to the analysis module respectively. Meanwhile, the analysis module also comprises a fault-tolerant error-correcting submodule for marking the 'abnormal refusal' fed back by the monitoring terminal and converting the abnormal condition into 'normal'; and marking the 'abnormal tolerance' fed back by the monitoring terminal, converting the abnormal condition into 'normal', and realizing fault tolerance and error correction. Therefore, the embodiment 2 adds the manual intervention module, so that the reliability of the device is ensured, and meanwhile, the device is prevented from being influenced by too sensitive abnormal alarm. And a fault-tolerant error correction mechanism is also arranged, so that the flexibility, intelligence and reliability of the monitoring device can be further improved.
In the manual intervention module of embodiment 2, when performing an "abnormality tolerance" operation on an accurate and tolerable abnormality or performing an "abnormality rejection" operation on an inaccurate abnormality, reasons need to be filled. This ensures the reliability and traceability of the manual intervention.
Finally, the analysis module of embodiment 2 further includes a weight setting sub-module for respectively setting weights for the environmental temperature, the environmental humidity, the water level, the environmental toxic and harmful gas, the cable joint temperature, the pulse signal of the partial discharge, the aged decomposed gas, and the cable joint appearance image; and the health scoring submodule calculates a comprehensive score according to the weight and generates an analysis and scoring report. The operation state of the cable joint can be integrally quantized and controlled, and the cable joint is simpler and clearer and is convenient for monitoring by workers.
In example 2, compared to example 1, the following effects can be obtained in addition to the effects achieved in example 1: the intelligent monitoring device is more intelligent, can give an alarm according to the importance degree and the emergency degree of different kinds of abnormity, and is added with a manual intervention module and a fault-tolerant error correction mechanism, so that the reliability of the device is ensured, the phenomenon that the abnormal alarm of the device is too sensitive to influence the operation can be prevented, and the monitoring device is more flexible, intelligent and reliable.
The present invention is not limited to the above-described preferred embodiments, but various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A cable joint on-line monitoring and analyzing device based on multi-sensor fusion comprises a main control module, an environment monitoring module electrically connected with the main control module, and a cable joint monitoring module electrically connected with the main control module; the environment monitoring module comprises a first temperature sensor for monitoring the environment temperature of the cable well, a humidity sensor for monitoring the environment humidity of the cable well, a water level sensor for monitoring the water level of the cable well and a first gas sensor for monitoring toxic and harmful gases; cable joint monitoring module is located cable joint department, including the second temperature sensor who is used for monitoring cable joint temperature and be used for monitoring cable joint partial discharge's high frequency current sensor, its characterized in that: the cable joint monitoring module also comprises a second gas sensor for detecting gas generated by aging and decomposition of an insulating layer of the cable joint and an image sensor for acquiring the appearance of the cable joint;
the online monitoring and analyzing device also comprises an analyzing module in communication connection with the main control module; the environment monitoring module and the cable joint monitoring module respectively convert and process the environment temperature, the environment humidity, the water level, the environment toxic and harmful gas, the cable joint temperature, the pulse signal of local discharge, the aging decomposition gas and the cable joint appearance image data obtained from each sensor and then transmit the data to the analysis module; and the analysis module analyzes the data to obtain a result, sends the result to the monitoring terminal and gives an alarm for abnormal conditions.
2. The multi-sensor fusion-based cable joint online monitoring and analyzing device as claimed in claim 1, wherein: the second gas sensor adopts a four-in-one gas detector of sulfur monoxide, sulfur dioxide, sulfur trioxide and hydrogen sulfide.
3. The multi-sensor fusion-based cable joint online monitoring and analyzing device as claimed in claim 1, wherein: the analysis module comprises
The threshold setting submodule is used for respectively setting thresholds for the ambient temperature, the ambient humidity, the water level, the toxic and harmful gases in the environment and the temperature of the cable connector;
the image identification submodule is used for identifying the acquired cable joint appearance image and comparing the acquired cable joint appearance image with an image obtained when the cable joint is put into use to judge whether the cable joint appearance image is matched with the image;
the abnormity judgment submodule is used for respectively comparing the environmental temperature, the environmental humidity, the water level, the environmental toxic and harmful gas and the cable joint temperature data obtained by real-time monitoring with respective corresponding threshold values, judging the data which do not exceed the threshold values as normal, and judging the data which exceed the threshold values as abnormal;
determining the partial discharge as abnormal when monitoring the pulse signal of the partial discharge;
judging the condition of the aging decomposition gas as abnormal;
judging the appearance image of the cable joint which is identified to be unmatched as abnormal;
and the abnormity warning sub-module is used for carrying out abnormity warning on the monitoring terminal when the abnormity is judged, and displaying the abnormity information.
4. The multi-sensor fusion-based cable joint online monitoring and analyzing device according to claim 3, wherein: the analysis module further comprises
The priority setting sub-module is used for sequentially setting priorities for environment temperature abnormity, environment humidity abnormity, water level abnormity, environment toxic and harmful gas abnormity, cable joint temperature abnormity, pulse signal abnormity of partial discharge, aging decomposition gas abnormity and cable joint appearance image abnormity;
and the abnormity warning submodule carries out abnormity warning to the monitoring terminal from high to low according to the priority when the abnormity is judged, and displays abnormity information.
5. The multi-sensor fusion-based cable joint on-line monitoring and analyzing device according to claim 4, wherein: in the priority setting submodule, the pulse signal abnormality of the ambient temperature abnormality, the cable joint temperature abnormality and the partial discharge is set to be high priority, the aging decomposition gas abnormality, the environment toxic and harmful gas abnormality and the cable joint appearance image abnormality are medium priority, and the ambient humidity abnormality and the water level abnormality are low priority.
6. The multi-sensor fusion-based cable joint online monitoring and analyzing device according to claim 3, wherein: the monitoring terminal is provided with a manual intervention module for judging the received abnormal alarm, judging whether the abnormality is accurate or tolerable, carrying out 'abnormality processing' operation on the accurate and intolerable abnormality, carrying out 'abnormality tolerance' operation on the accurate and tolerable abnormality, carrying out 'abnormality rejection' operation on the inaccurate abnormality and respectively feeding back the operation to the analysis module.
7. The multi-sensor fusion based cable joint on-line monitoring and analyzing device as claimed in claim 6, wherein: the analysis module also comprises a fault-tolerant error correction submodule for marking the 'abnormal refusal' fed back by the monitoring terminal and converting the abnormal condition into 'normal'; and marking the 'abnormal tolerance' fed back by the monitoring terminal, converting the abnormal condition into 'normal', and realizing fault tolerance and error correction.
8. The multi-sensor fusion-based cable joint online monitoring and analyzing device as claimed in claim 6, wherein: in the manual intervention module, reasons need to be filled when performing 'exception tolerance' operation on accurate and tolerable exceptions or 'exception rejection' operation on inaccurate exceptions.
9. The multi-sensor fusion-based cable joint online monitoring and analyzing device according to claim 3, wherein: in the image identification submodule, identification and comparison parameters comprise whether the appearance of the cable joint is complete, whether the color is uniform, whether the glossiness is consistent or whether an unclear point/line/surface exists, and the condition that the appearance is incomplete, the color is not uniform, the glossiness is inconsistent and the unclear point/line/surface exists is judged to be unmatched.
10. The multi-sensor fusion-based cable joint online monitoring and analyzing device according to claim 3, wherein: the analysis module further comprises
The weight setting submodule is used for respectively setting weights for the environment temperature, the environment humidity, the water level, the environment toxic and harmful gas, the cable joint temperature, the pulse signal of partial discharge, the aging decomposition gas and the cable joint appearance image;
and the health scoring submodule calculates a comprehensive score according to the weight and generates an analysis and scoring report.
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| CN202210925197.4A CN115343583A (en) | 2022-08-03 | 2022-08-03 | Cable joint on-line monitoring analytical equipment based on multisensor fuses |
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| CN202210925197.4A CN115343583A (en) | 2022-08-03 | 2022-08-03 | Cable joint on-line monitoring analytical equipment based on multisensor fuses |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115855148A (en) * | 2022-11-24 | 2023-03-28 | 广东新亚光电缆股份有限公司 | Electric parameter monitoring system of 6-35 kV waterproof alternating current power cable |
| CN117554768A (en) * | 2024-01-12 | 2024-02-13 | 广州南网科研技术有限责任公司 | Cable accessory partial discharge monitoring method |
| CN117686783A (en) * | 2023-12-12 | 2024-03-12 | 武汉朗德电气有限公司 | High-voltage cable grounding current on-line monitoring device based on load dynamic management |
| CN117723114A (en) * | 2023-12-14 | 2024-03-19 | 北京爱朗格瑞科技有限公司 | Intelligent high-voltage cable working environment monitoring system |
| WO2024109381A1 (en) * | 2022-11-24 | 2024-05-30 | 高利通科技（深圳）有限公司 | Cable joint gas measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115855148A (en) * | 2022-11-24 | 2023-03-28 | 广东新亚光电缆股份有限公司 | Electric parameter monitoring system of 6-35 kV waterproof alternating current power cable |
| WO2024109381A1 (en) * | 2022-11-24 | 2024-05-30 | 高利通科技（深圳）有限公司 | Cable joint gas measuring device |
| CN117686783A (en) * | 2023-12-12 | 2024-03-12 | 武汉朗德电气有限公司 | High-voltage cable grounding current on-line monitoring device based on load dynamic management |
| CN117723114A (en) * | 2023-12-14 | 2024-03-19 | 北京爱朗格瑞科技有限公司 | Intelligent high-voltage cable working environment monitoring system |
| CN117554768A (en) * | 2024-01-12 | 2024-02-13 | 广州南网科研技术有限责任公司 | Cable accessory partial discharge monitoring method |
| CN117554768B (en) * | 2024-01-12 | 2024-03-15 | 广州南网科研技术有限责任公司 | Cable accessory partial discharge monitoring method |
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