CN108761280A - A kind of method and system of cable connector Gernral Check-up - Google Patents
A kind of method and system of cable connector Gernral Check-up Download PDFInfo
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- CN108761280A CN108761280A CN201810301089.3A CN201810301089A CN108761280A CN 108761280 A CN108761280 A CN 108761280A CN 201810301089 A CN201810301089 A CN 201810301089A CN 108761280 A CN108761280 A CN 108761280A
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- cable connector
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- temperature
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- chloride
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 48
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 37
- 230000003862 health status Effects 0.000 claims abstract description 19
- 238000005660 chlorination reaction Methods 0.000 claims abstract description 11
- 238000013528 artificial neural network Methods 0.000 claims description 10
- 230000003321 amplification Effects 0.000 claims description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 238000000354 decomposition reaction Methods 0.000 claims description 7
- 230000015556 catabolic process Effects 0.000 claims description 6
- 238000006731 degradation reaction Methods 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 6
- 238000012549 training Methods 0.000 claims description 6
- 230000002123 temporal effect Effects 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 9
- 238000009413 insulation Methods 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 6
- 238000003745 diagnosis Methods 0.000 abstract description 6
- 230000036541 health Effects 0.000 abstract description 5
- 239000012491 analyte Substances 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- -1 Polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000000699 topical effect Effects 0.000 description 1
Classifications
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
Abstract
The invention discloses a kind of method and system of cable connector Gernral Check-up, three parts are diagnosed including temperature diagnostic, shelf depreciation diagnosis and its chloride, it is measured in real time by the running temperature to cable connector, by being acquired to the ultrasonic wave generated when shelf depreciation, judge that cable connector whether there is partial discharge phenomenon, by being detected to the product that cable decomposes, the degree of aging of cable connector housing is analyzed, method is simple and reliable；The health of cable connector is diagnosed and handled according to results such as temperature detection, Partial Discharge Detection and chlorination analyte detections, the health status of cable connector is analyzed and recorded, the insulation status of cable connector is predicted, the probability that accident occurs for cable connector is reduced, ensure that the reliability of cable connector Gernral Check-up.Present system uses modularized design, simple in structure easy to operate, can realize on-line monitoring, can predict the health status of cable, ensure that the safe and stable operation of system.
Description
Technical field
The present invention relates to electric power monitoring fields, and in particular to a kind of method and system of cable connector Gernral Check-up.
Background technology
With the high speed development of power technology, each metropolitan transmission line of electricity is changed to underground by original overhead transmission line and applies
If mode, greatly ensure that cable reliability of operation.In power cable line, cable connector is power system security
The most weak link of operation, according to incompletely statistics, since cable accessory failure causes the ratio of cable operation fault to be up to 39%,
Cable connector is while undertaking operation task and failure happening part and the most weak link of cable insulation.Cable connector
Electric discontinuity of cable, short circuit, explosion even cause great fire incident caused by overheat meeting.Cable connector is superheated to fire thing
Therefore be that a speed is slow, time longer process, therefore Gernral Check-up is carried out to cable connector, it will be able to it is effectively anti-
The only generation of cable connector fire improves the reliability service of cable.By the on-line monitoring to cable connector, cable is understood in time
The health status of connector in time overhauls the cable connector there are security risk, greatlys improve the safety of electric system
Property.Complex to the monitoring of cable connector at this stage, maintenance workload is big, and cost is higher, bad adaptability, can only topical application
In some important places.
Invention content
It is an object of the invention to overcome problems of the prior art, a kind of side of cable connector Gernral Check-up is provided
Method and system can be monitored cable connector operation conditions, be judged in real time the health status of cable, ensure electricity
The safely and reliably operation of cable joint, adaptability are stronger.
In order to achieve the above object, the present invention adopts the following technical scheme that：
A kind of method of cable connector Gernral Check-up, includes the following steps：
Step 1) generates the ultrasonic signal and cable degradation and decomposition of cable connector real time temperature, shelf depreciation generation
Chloride information be acquired respectively；
The ultrasonic signal and the production of cable degradation and decomposition that step 2), storage cable connector real time temperature, shelf depreciation generate
Raw chloride information, and analyze the health status of cable connector.
Further：In step 2), the ultrasonic signal generated to shelf depreciation establishes two-dimensional map, BP neural network with
Known Partial Discharge Data extracts its time domain and its frequency domain character as training sample, training neural network from two-dimensional map
As the input for the BP neural network trained, output is the type of shelf depreciation, according to output valve to the type of shelf depreciation
Judged.
Further：Two-dimensional map is respectively phase and discharge capacityPhase and discharge timeDischarge capacity with
Discharge time n-q.
Further：Temporal signatures be root mean square, variance, peak value and degree of skewness, frequency domain character be power spectrum maximum value, in
It is worth frequency and frequency of average power.
Further：In step 2), cable connector real time temperature is compared with the threshold value of setting, when a threshold is exceeded
Carry out early warning；When detecting that chloride concentration increases, early warning is carried out；When shelf depreciation occurs in cable connector, early warning is carried out.
A kind of system of cable connector Gernral Check-up includes the cable connector Partial Discharge Detection on cable connector
Module, temperature of cable junction detection module and cable connector chloride detection module, cable connector Partial Discharge Detection module connect
Computer is connect, temperature of cable junction detection module connects calculating with cable connector chloride detection module by microprocessor
Machine.
Further：Cable connector Partial Discharge Detection module includes the ultrasonic sensor being sequentially connected, ultrasonic wave letter
Number modulate circuit and data collecting card, wherein ultrasonic sensor contains several and is evenly arranged on cable connector, data
Capture card connects computer.
Further：Ultrasonic sensor uses D9241 ultrasonic sensors；Ultrasonic signal modulate circuit includes successively
The pre-amplification circuit of connection, filter circuit and postposition amplifying circuit, pre-amplification circuit use AD8610 chips, filter circuit
Using MAX275 adjustable filters, postposition amplifying circuit is made of TL084 chips and adjustable resistance；Data collecting card uses
PCI-1714 data collecting cards.
Further：Temperature of cable junction detection module uses MLX90620 infrared array temperature transducers；Cable connector
Chloride detection module uses 7HCl-50 chlorination hydrogen sensors, 7HCl-50 chlorinations hydrogen sensor to pass through AD circuits and microprocessor
It is connected.
Further：The model STM32F10ZET6 of microprocessor.
Compared with prior art, the present invention has technique effect beneficial below：
The method of cable connector Gernral Check-up of the present invention includes temperature diagnostic, shelf depreciation diagnosis and its chloride diagnosis three
Part is measured in real time by the running temperature to cable connector, by being carried out to the ultrasonic wave generated when shelf depreciation
Acquisition judges that cable connector whether there is partial discharge phenomenon, and by being detected to the product that cable decomposes, analysis cable connects
The degree of aging of head housing, method are simple and reliable；The present invention can be according to temperature detection, Partial Discharge Detection and chlorination analyte detection
Etc. results the health of cable connector is diagnosed and is handled, the health status of cable connector is analyzed and is recorded, to electricity
The insulation status of cable joint is predicted, the probability that accident occurs for cable connector is reduced, and the present invention combines detection using three kinds
Method ensure that the reliability of cable connector Gernral Check-up.
Present system uses modularized design, simple in structure easy to operate；Using miniaturized design, have it is easy to carry,
It is easy for installation, it can realize on-line monitoring, the health status of cable can be predicted, ensure that the safety and stability fortune of system
Row.The present invention can be monitored cable connector operation conditions, be judged in real time the health status of cable, ensure electricity
The safely and reliably operation of cable joint；Adaptable with higher sensitivity, simple operation and other advantages can be effective
Cable connector health status is diagnosed.
Description of the drawings
Fig. 1 is the functional block diagram of detecting system provided by the invention.
Fig. 2 is the use state diagram of detecting system provided by the invention.
Fig. 3 is the process chart of diagnostic system provided by the invention.
Fig. 4 is postposition amplification circuit diagram of the present invention.
In figure, 1 cable connector；2 cables；3 ultrasonic sensors；4 infrared array temperature transducers；5 chloride sensors；
6 microprocessors；7 data collecting cards；8 computers.
Specific implementation mode
The present invention is described in further details below in conjunction with the accompanying drawings.
1. as shown in Figure 1 and Figure 2, cable connector health diagnosis system of the present invention includes ultrasonic sensor 3, infrared array
Temperature transducer 4, chloride sensor 5, signal conditioning circuit, microprocessor 6, data collecting card 7 and computer 8；Ultrasonic wave
Sensor 3 can judge cable connector 1 with the presence or absence of partial discharge phenomenon, assess 1 insulation performance of cable connector；It is infrared
Array temperature transducer 4 can be acquired 1 temperature information of cable connector of operation, assess the febrile state of cable connector 1
Whether in normal range (NR)；Chloride after chloride sensor 5 mainly decomposes cable cover(ing) is detected, and is assessed outside cable
Cover the degree of aging.Computer software can be by the cable connector shelf depreciation information of acquisition, temperature of cable junction information, chlorination
Object information carries out comprehensive analysis, assesses the health status of cable connector, establishes cable health status table, intuitive to show
Cable health status.
2. in the present invention, cable connector Partial Discharge Detection module is mainly completed to put cable connector 1 with the presence or absence of part
Electricity is judged.Partial Discharge Detection module includes the ultrasonic sensor 3 being sequentially connected, ultrasonic signal modulate circuit sum number
According to capture card 7.Ultrasonic sensor 3 selects D9241 ultrasonic sensors, and the bandwidth of D9241 ultrasonic sensors is 20-
180kHz disclosure satisfy that the requirement of 1 shelf depreciation of cable connector acquisition.Before ultrasonic signal modulate circuit includes sequentially connected
Amplifying circuit, filter circuit and postposition amplifying circuit are set, pre-amplification circuit is designed using AD8610 chips, amplification factor
It is 10 times；Filter circuit uses the MAX275 adjustable filters of Texas Instrument, can be adjusted according to on-site actual situations,
Acquiescence uses bandpass filtering, bandwidth 50-150kHz；As shown in figure 4, postposition amplifying circuit uses TL084 chips and adjustable electric
Resistance composition, amplification factor are 10 times.Data collecting card 7 uses PCI-1714 data collecting cards, PCI-1714 to have the single-ended synchronization in 4 tunnels
Acquisition channel is inputted, disclosure satisfy that the acquisition of Processing of Partial Discharge Ultrasonic Signals.
3. in the present invention, temperature of cable junction detection module is mainly completed to be monitored the temperature of cable connector 1.Temperature
Using the MLX90620 of MELEXIS companies, MLX90620 is the quasi- 16*4 pixels IR arrays of whole school for detection, including 64 IR pixels,
Each pixel is corresponding with low noise chopper amplifier and high-speed ADC.PTAT sensors in chip are used for measuring environment temperature,
PTAT sensor currents and absolute temperature is proportional to.All there is internal RAM (random access memory) in the output of IR and PTAT,
And it can be communicated and be obtained by IIC (IC bus).The RAM data of different address is obtained by microprocessor 6, and reference is deposited
In the calibration figure of EEPROM (Electrically Erasable Programmable Read-Only Memory), the difference between different sensors is compensated.According to difference
The data of sensor detection, establish thermal image to cable connector 1, calculate the temperature of every bit, and microprocessor 6 is by the cable of acquisition
1 temperature data of connector is transferred to computer 8.
4. in the present invention, cable connector chloride detection module mainly completes the detection to cable jacket decomposition product.Chlorine
Compound detection uses the 7HCl-50 chlorination hydrogen sensors of Honeywell.Cable connector chloride detection module is using highly sensitive
Design, ensure that the accuracy of detection.7HCl-50 chlorinations hydrogen sensor is attached by AD circuits with microprocessor, micro- place
Device is managed by collected hydrogen chloride data transmission to computer.
5. in the present invention, microprocessor 6 mainly selects STM32F10ZET6, and STM32F10ZET6 microprocessors are 32 bases
In the microcontroller of the 512 byte flash memory of band of ARM cores.STM32F10ZET6 contains 3 12-bit digital-to-analog converters, disclosure satisfy that
The requirement of data acquisition.
6. Computer system of the present invention is mainly write using Labview softwares.The major function of upper computer software
It is that the data of acquisition are analyzed and stored, as shown in Figure 3.Shelf depreciation information is output to meter by data collecting card 7
Calculation machine 8, computer 8 can establish two-dimensional map, respectively phase and discharge capacity to local discharge informationPhase with
Discharge timeDischarge capacity and discharge time (n-q), i.e.,：
The characteristic quantity of shelf depreciation is counted using statistical method, by the local discharge signal in several periods
It carries out being conducive to the feature for reflecting shelf depreciation in statistics conversion to a cycle, reflects the rule of shelf depreciation；By this
Method can obtain three fundamental quantities:Discharge time (n), discharge capacity (q), discharge phaseBy to these three
Fundamental quantity is counted to obtain two-dimentional spectrogram.
Figure
One power frequency period is divided into several phase windows, counts the number of the electric discharge in each phase window[51], i.e. phase window j
Interior repetitive rate njForWherein njsFor discharge time of h-th of period in phase window j.
Figure
The discharge time and discharge capacity of each phase window of each period are counted, then the mean discharge magnitude q in phase window jjForWherein qjisFor the Apparent discharge magnitude of s-th of period ith electric discharge in phase window j.
What two-dimentional q-n spectrograms reflected is the distribution of discharge pulse amplitude[51].The discharge capacity for recording M period is qiElectric discharge
Total nj。
Its time domain and its frequency domain character are extracted from two-dimensional map, temporal signatures are root mean square, variance, peak value and degree of skewness,
Frequency domain character is power spectrum maximum value, median frequency and frequency of average power.Using the temporal signatures of extraction and frequency domain character as
The input of BP neural network, BP neural network is using known Partial Discharge Data as training sample, and training neural network is practical
In detection, temporal signatures and frequency domain character are input to the BP neural network trained, output is the type of shelf depreciation, defeated
The type of shelf depreciation can be judged by going out, and staff can be according to the severe degree of shelf depreciation to cable connector 1
Insulation performance judged.1 temperature information of cable connector is mainly attached by the serial ports and computer of microprocessor 6.
Labview can establish temperature pattern to the bulk temperature information of cable, monitor the temperature information of cable connector 1, acquisition in real time
Temperature information be compared with the threshold value of computer installation, carry out early warning when a threshold is exceeded.Upper computer software can be to chlorine
The concentration of compound establishes curve, the intuitive chloride for showing cable jacket and decomposing.Upper computer software can be by cable connector office
Portion's discharge information, temperature of cable junction information, cable connector chloride information carry out comprehensive analysis, are shown by the way of percentage
Show the health status of cable.
The method of cable connector Gernral Check-up of the present invention includes that temperature diagnostic is diagnosed with shelf depreciation diagnosis and its chloride
Three parts.Temperature detection measures the running temperature of cable connector 1 using infrared array formula thermometric in real time, after measurement
Temperature information is transmitted to computer 8 by microprocessor 6, is divided the temperature information of cable connector 1 by computer software
Analysis diagnosis.Partial Discharge Detection passes through the ultrasonic wave generated when shelf depreciation using ultrasonic sensor 3 and is acquired, and judges electricity
Cable joint 1 whether there is partial discharge phenomenon, and when there is shelf depreciation generation, ultrasonic sensor 3 receives shelf depreciation production
Raw ultrasonic signal, is handled by signal conditioning circuit, is acquired by A/D capture cards and is transferred to computer 8 by optical fiber, passed through
Computer 8 analyzes the shelf depreciation trend and shelf depreciation type of cable connector 1.Chlorination analyte detection uses chlorination hydrogen sensor pair
The product that cable decomposes is detected, and the data after acquisition are transmitted to computer 8 by microprocessor 6, are analyzed by computer 8
The degree of aging of cable connector housing.Three kinds of diagnostic results of computer generalization, predict the health status of cable connector.
Cable connector Gernral Check-up method of the present invention, is specifically realized according to the following steps：
(1) 1 real time temperature of cable connector is acquired using four groups of infrared array temperature transducers 4, four groups of infrared battle arrays
Row temperature transducer 4 is individually fixed in four orientation of cable connector 1, realizes and is covered to the whole of cable connector 1.
(2) four ultrasonic sensor groups are placed on according to diamond array on cable connector 1 on cable circumference, when having
When shelf depreciation occurs, ultrasonic sensor 3 can receive the ultrasonic signal of shelf depreciation generation, judge that cable is exhausted with this
The degree of edge aging.
(3) chloride sensor 5 is fixed on cable connector 1, detection cable whether degradation and decomposition generate chloride.
Judge the degree of cable aging.
(4) temperature information of computer acquisition cable connector 1, shelf depreciation information, chloride information, comprehensive analysis are sentenced
It powers off the health status of cable joint and stores the data of acquisition.
Comprehensive analytical judgment refers specifically to shelf depreciation judgement：Cable connector is examined in real time by ultrasonic sensor
It surveys, one important indicator of evaluation decreasing insulating illustrates cable when Partial discharge occurs in cable connector when shelf depreciation
There are problems for the insulation of connector；Chloride judges：Chloride information, detection cable connector are acquired in real time by chloride sensor
With the presence or absence of degradation and decomposition, when detecting that chloride concentration gradually rises, illustrate that cable connector degree of aging is accelerated, it should carry
The staff that wakes up timely is repaired, i.e.,：Cable steeply rises in temperature can cause cable insulation polyvinyl chloride to decompose, and pass through
The chloride that chloride sensor detection cable is generated by thermal decomposition, you can the degree of cable aging is carried out as assistant criteria
Judge, under normal circumstances, chloride sensor will not detect chloride, when cable failure, cause cable temperature excessively high,
Polyvinyl chloride can be caused to decompose, chloride sensor can detect chloride, and cable connector is just illustrated when detecting chloride
Aging；Temperature detection：Cable connector running temperature is monitored in real time by infrared sensor array, temperature of cable junction
Excessively high to cause the disasters such as fire, temperature is excessively high to cause decreasing insulating, temperature also can be to the health operation shape of cable
State is timely reacted.
To cable connector Gernral Check-up, based on Partial Discharge Detection, supplemented by chlorination analyte detection and temperature detection, Ke Yijing
Really to the health status of assessment cable connector.
The principle of the present invention is as follows：
The detection principle of infrared array temperature transducer 4 is based on fuel factor, when object under test will be caused temperature by radiation
The raising of degree can be changed using radiation to carry out determinand electricity or non electrical quantity to influence the performance change of determinand
Detection.
Partial Discharge Detection principle：After shelf depreciation occurs, acted on by electric field force or pressure, bubble can expand and
The process of contraction, this process will cause local volume to change, and generate dilatational wave in outside, that is, generate sound wave.
Chloride testing principle：Cross-linked polyethylene insulated cable is to make cable insulation using chemically or physically
Polyethylene molecule is changed into main body network molecular structure by linearity molecular structure, i.e., thermoplastic polyethylene is changed into heat cured
Crosslinked polyethylene decomposes when crosslinked polyethylene is heated and generates hydrogen chloride and vinyl chloride.
The present invention provides a kind of method and system of cable connector Gernral Check-up, can to cable connector operation conditions into
Row monitoring, judges the health status of cable, ensures the safely and reliably operation of cable connector in real time；The present invention detects
Method and system has higher sensitivity, and adaptable, simple operation and other advantages can be effectively to cable connector health
Situation is diagnosed, and is also had the following advantages that：
(1) it is compared with other cable connector diagnostic methods, the method that the present invention combines detection using three kinds ensure that cable
The reliability of connector Gernral Check-up.
(2) present invention use miniaturized design, have it is easy to carry, it is easy for installation, can realize on-line monitoring；
(3) present invention uses modularized design, simple in structure easy to operate.
(4) present invention can predict the health status of cable, ensure that the safe and stable operation of system.
Claims (10)
1. a kind of method of cable connector Gernral Check-up, it is characterised in that：Include the following steps：
The chlorine of step 1), ultrasonic signal and the generation of cable degradation and decomposition that cable connector real time temperature, shelf depreciation are generated
Compound information is acquired respectively；
What the ultrasonic signal and cable degradation and decomposition that step 2), storage cable connector real time temperature, shelf depreciation generate generated
Chloride information, and analyze the health status of cable connector.
2. a kind of method of cable connector Gernral Check-up according to claim 1, it is characterised in that：In step 2), play a game
The ultrasonic signal that portion's electric discharge generates establishes two-dimensional map, and BP neural network is using known Partial Discharge Data as training sample
This, training neural network extracts its time domain and input of its frequency domain character as the BP neural network trained from two-dimensional map,
Output is the type of shelf depreciation, is judged the type of shelf depreciation according to output valve.
3. a kind of method of cable connector Gernral Check-up according to claim 2, it is characterised in that：Two-dimensional map is respectively
Phase and discharge capacityPhase and discharge timeDischarge capacity and discharge time n-q.
4. a kind of method of cable connector Gernral Check-up according to claim 2, it is characterised in that：Temporal signatures are square
Root, variance, peak value and degree of skewness, frequency domain character are power spectrum maximum value, median frequency and frequency of average power.
5. a kind of method of cable connector Gernral Check-up according to claim 1, it is characterised in that：It, will be electric in step 2)
Cable joint real time temperature is compared with the threshold value of setting, carries out early warning when a threshold is exceeded；When detecting chloride concentration liter
Gao Shi carries out early warning；When shelf depreciation occurs in cable connector, early warning is carried out.
6. a kind of system of cable connector Gernral Check-up, it is characterised in that：It include the cable connector office on cable connector
Portion's discharge examination module, temperature of cable junction detection module and cable connector chloride detection module, cable connector shelf depreciation
Detection module connects computer, and temperature of cable junction detection module and cable connector chloride detection module pass through microprocessor
Connect computer.
7. a kind of system of cable connector Gernral Check-up according to claim 6, it is characterised in that：Cable connector is locally put
Electro-detection module includes the ultrasonic sensor being sequentially connected, ultrasonic signal modulate circuit and data collecting card, wherein ultrasound
Wave sensor contains several and is evenly arranged on cable connector, and data collecting card connects computer.
8. a kind of system of cable connector Gernral Check-up according to claim 6, it is characterised in that：Ultrasonic sensor is adopted
With D9241 ultrasonic sensors；Ultrasonic signal modulate circuit includes sequentially connected pre-amplification circuit, and filter circuit is with after
Amplifying circuit is set, pre-amplification circuit uses AD8610 chips, filter circuit to use MAX275 adjustable filters, postposition amplification
Circuit is made of TL084 chips and adjustable resistance；Data collecting card uses PCI-1714 data collecting cards.
9. a kind of system of cable connector Gernral Check-up according to claim 6, it is characterised in that：Temperature of cable junction is examined
It surveys module and uses MLX90620 infrared array temperature transducers；Cable connector chloride detection module uses 7HCl-50 hydrogen chloride
Sensor, 7HCl-50 chlorinations hydrogen sensor are connected by AD circuits with microprocessor.
10. a kind of system of cable connector Gernral Check-up according to claim 6, it is characterised in that：The type of microprocessor
Number be STM32F10ZET6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810301089.3A CN108761280A (en) | 2018-04-04 | 2018-04-04 | A kind of method and system of cable connector Gernral Check-up |
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| CN201810301089.3A CN108761280A (en) | 2018-04-04 | 2018-04-04 | A kind of method and system of cable connector Gernral Check-up |
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| CN108761280A true CN108761280A (en) | 2018-11-06 |
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| CN201810301089.3A Pending CN108761280A (en) | 2018-04-04 | 2018-04-04 | A kind of method and system of cable connector Gernral Check-up |
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|---|---|
| CN (1) | CN108761280A (en) |
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| CN109975674A (en) * | 2019-04-23 | 2019-07-05 | 国网江苏省电力有限公司扬州供电分公司 | A kind of intermediate joint of electric cable state of insulation on-line measuring device |
| CN110554290A (en) * | 2019-10-22 | 2019-12-10 | 广东电网有限责任公司 | Cable insulation state monitoring device and monitoring method based on state perception |
| CN110749379A (en) * | 2019-11-08 | 2020-02-04 | 积成电子股份有限公司 | Cable joint fault detection method and device based on non-contact infrared temperature measurement |
| CN110988612A (en) * | 2019-11-08 | 2020-04-10 | 广东电网有限责任公司 | Cable head insulation performance online monitoring system and method |
| CN111199626A (en) * | 2020-01-07 | 2020-05-26 | 北京泓业致联科技有限公司 | Piping lane intelligence on-line monitoring system |
| CN112213605A (en) * | 2020-11-19 | 2021-01-12 | 云南电网有限责任公司临沧供电局 | Cable partial discharge tracking early warning method and system based on nitrogen dioxide monitoring |
| CN113064040A (en) * | 2021-05-18 | 2021-07-02 | 国网河南省电力公司南阳供电公司 | Coated cable joint fault early warning device and method |
| CN114372734A (en) * | 2022-03-23 | 2022-04-19 | 广东电网有限责任公司佛山供电局 | Real-time evaluation method and system for insulation state of cable intermediate joint |
| CN114485954A (en) * | 2021-12-16 | 2022-05-13 | 国网山东省电力公司济宁供电公司 | Cable accessory temperature data abnormity judgment method and system |
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| CN109975674A (en) * | 2019-04-23 | 2019-07-05 | 国网江苏省电力有限公司扬州供电分公司 | A kind of intermediate joint of electric cable state of insulation on-line measuring device |
| CN110554290A (en) * | 2019-10-22 | 2019-12-10 | 广东电网有限责任公司 | Cable insulation state monitoring device and monitoring method based on state perception |
| CN110749379A (en) * | 2019-11-08 | 2020-02-04 | 积成电子股份有限公司 | Cable joint fault detection method and device based on non-contact infrared temperature measurement |
| CN110988612A (en) * | 2019-11-08 | 2020-04-10 | 广东电网有限责任公司 | Cable head insulation performance online monitoring system and method |
| CN110988612B (en) * | 2019-11-08 | 2021-07-20 | 广东电网有限责任公司 | Cable head insulation performance online monitoring system and method |
| CN111199626A (en) * | 2020-01-07 | 2020-05-26 | 北京泓业致联科技有限公司 | Piping lane intelligence on-line monitoring system |
| CN112213605A (en) * | 2020-11-19 | 2021-01-12 | 云南电网有限责任公司临沧供电局 | Cable partial discharge tracking early warning method and system based on nitrogen dioxide monitoring |
| CN113064040A (en) * | 2021-05-18 | 2021-07-02 | 国网河南省电力公司南阳供电公司 | Coated cable joint fault early warning device and method |
| CN114485954A (en) * | 2021-12-16 | 2022-05-13 | 国网山东省电力公司济宁供电公司 | Cable accessory temperature data abnormity judgment method and system |
| CN114372734A (en) * | 2022-03-23 | 2022-04-19 | 广东电网有限责任公司佛山供电局 | Real-time evaluation method and system for insulation state of cable intermediate joint |
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