CN109631986A - A kind of cable and its monitoring of working condition early warning system - Google Patents
A kind of cable and its monitoring of working condition early warning system Download PDFInfo
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- CN109631986A CN109631986A CN201811466301.8A CN201811466301A CN109631986A CN 109631986 A CN109631986 A CN 109631986A CN 201811466301 A CN201811466301 A CN 201811466301A CN 109631986 A CN109631986 A CN 109631986A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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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Abstract
The present invention provides a kind of cable and its monitoring of working condition early warning system, including data processor, data collecting card, environment parameter collector, current acquisition card, current transformer, locating module, communication module, power supply, server；Locating module is used for the position of positioning system, environment parameter collector acquires the environment parameter in cable tunnel, current transformer acquires cable three-phase current signal, data processor calculates cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal according to current signal, and generate warning message, above- mentioned information are uploaded to server, server selection failure concrete position by communication module by data processor.The present invention realizes cable overvoltage and insulation state monitoring early warning, rapidly removing faults by small signals of wide frequency domains such as wide frequency domain current transformer real-time monitoring cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage.
Description
Technical field
The present invention relates to cable monitoring and early warning technology field more particularly to a kind of cable and its monitoring of working condition early warning systems
System.
Background technique
With the propulsion of urbanization, the construction of scale of urbanization is accelerated rapidly, and the power cable for being used for transmission electric energy also exists
The features such as continuous extend constitutes supply network, and cable distribution is wide, remote apart constitutes buried cable network in large scale.
Bad environments locating for buried cable are complicated and changeable, if the pernicious gas in the ponding in individual places, ditch in well is to cable
Safe and reliable power supply causes detrimental effect.Existing monitoring system is only high-volume monitored the circulation drawn game of cable, in advance
Alert accuracy is poor, and can not quickly navigate to cable fault position.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide a kind of cable and its monitoring of working condition early warning systems
System, solves existing monitoring system and is only high-volume monitored to the circulation drawn game of cable, early warning accuracy is poor, and can not be quick
The problem of navigating to cable fault position.
The present invention provides a kind of cable and its monitoring of working condition early warning system, including data processor, data collecting card, environment
Parameter collector, current acquisition card, current transformer, locating module, communication module, power supply, server；The power supply with it is described
Data processor, data collecting card, environment parameter collector, current acquisition card, current transformer, locating module, communication module,
Server connection, the data processor and the data collecting card, current acquisition card, locating module, communication module, server
Connection, the data collecting card are connect with the environment parameter collector, and the current acquisition card and the current transformer connect
It connecing, the locating module is used for the position of positioning system, and the environment parameter collector acquires the environment parameter in cable tunnel,
The current transformer acquires cable three-phase current signal, and the data processor calculates cable loop according to the current signal
Stream, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal, and warning message is generated, the data processor passes through described
Communication module is by the environment parameter, the cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal, described
Warning message, the system position be uploaded to the server, the server passes through the environment parameter, the cable loop
Stream, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal, the warning message, the system position positioning failure tool
Body region.
Further, the current acquisition card includes power frequency capture card, high frequency capture card.
Further, the current transformer includes power current mutual inductor, HF current transformer, the power frequency acquisition
Card is connect with the power current mutual inductor, and the high frequency capture card is connect with the HF current transformer, the power frequency electric
Current transformer acquires cable three-phase main-frequency electric current, and the HF current transformer acquires cable three-phase high-frequency current.
Further, the power current mutual inductor, the HF current transformer install cable screens using punching mode
It covers on layer ground line.
Further, the power frequency capture card is rail-to-rail operational amplifier, and the high frequency capture card is high gain operational
Amplifier.
Further, the environment parameter collector includes Temperature Humidity Sensor, water sensor, smoke sensor device, makes an uproar
Sonic transducer, optical sensor, infrared sensor.
Further, the communication module includes ZigBee module, 433M configuration net module, GPRS module, fiber optic communication
Module.
Further, the data processor is the FPGA of built-in ARM stone.
Further, the locating module is GPS/ Beidou module, and the GPS/ Beidou module and satellite navigation system are logical
Letter connection.
Further, the power supply is solar battery, current transformer induction electricity-fetching module, AC power source, lithium battery.
Compared with prior art, the beneficial effects of the present invention are:
The present invention provides a kind of cable and its monitoring of working condition early warning system, including data processor, data collecting card, environment
Parameter collector, current acquisition card, current transformer, locating module, communication module, power supply, server；Power supply and data processing
Device, data collecting card, environment parameter collector, current acquisition card, current transformer, locating module, communication module, server connect
It connects, data processor is connect with data collecting card, current acquisition card, locating module, communication module, server, data collecting card
It is connect with environment parameter collector, current acquisition card is connect with current transformer, and locating module is used for the position of positioning system, ring
Border parameter collector acquires the environment parameter in cable tunnel, and current transformer acquires cable three-phase current signal, data processing
Device calculates cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal according to current signal, and generates alarm signal
Breath, data processor pass through communication module for environment parameter, cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage
Signal, warning message, system position be uploaded to server, server passes through environment parameter, cable circulation, harmonic wave, medium damage
Consumption, the position positioning failure concrete position of high frequency partial discharge amount, overvoltage signal, warning message, system.The present invention is not changing electricity
Under the premise of power equipment primary connection mode, damaged by wide frequency domain current transformer real-time monitoring cable circulation, harmonic wave, medium
The small signal of wide frequency domains such as consumption, high frequency partial discharge amount, overvoltage, passes through temperature sensor, humidity sensor, water level sensor, smog
Sensor, noise transducer, optical sensor, the various environment parameters in infrared sensor real-time monitoring cable tunnel, can
The accurate insulation degradation evolution process and overvoltage level for obtaining cable under operating status, it is exhausted for the improvement of cable overvoltage, optimization
Edge cooperation and the operation of formulation cable, Strategies of Maintenance provide actual measurement foundation, and cable tunnel administrative department can be allowed to obtain correlation in time
The situation and location information of accident realize cable overvoltage and insulation state monitoring early warning, rapidly removing faults.This system is based on
Hardware realization is handled in real time, and monitoring and prealarming process are not necessarily to software intervention.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
A specific embodiment of the invention is shown in detail by following embodiment and its attached drawing.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is of the invention a kind of cable and its monitoring of working condition early warning system schematic diagram.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
A kind of cable and its monitoring of working condition early warning system, as shown in Figure 1, including data processor, data collecting card, environment
Parameter collector, current acquisition card, current transformer, locating module, communication module, power supply, server；Power supply and data processing
Device, data collecting card, environment parameter collector, current acquisition card, current transformer, locating module, communication module, server connect
It connects, data processor is connect with data collecting card, current acquisition card, locating module, communication module, server, data collecting card
It is connect with environment parameter collector, current acquisition card is connect with current transformer, and locating module is used for the position of positioning system, ring
Border parameter collector acquires the environment parameter in cable tunnel, and current transformer acquires cable three-phase current signal, data processing
Device calculates cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal according to current signal, and generates alarm signal
Breath, data processor pass through communication module for environment parameter, cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage
Signal, warning message, system position be uploaded to server, server passes through environment parameter, cable circulation, harmonic wave, medium damage
Consumption, the position positioning failure concrete position of high frequency partial discharge amount, overvoltage signal, warning message, system.Such as: data processor is real
When acquisition cable on overvoltage condition, over-voltage waveform is stored if having overvoltage event generation, and to upper alarm；For cable
Dielectric level, high frequency partial discharge amount and leakage current are monitored on power cable metal sheath down conductor, and pass through comparison
Leakage current calculates opposite dielectric loss on multiple power cable metal sheaths and down conductor, determines failure cable section, and lead to
Cross further server analysis, positioning failure concrete position.
Because need to acquire leakage current of A, B, C three-phase in the band limits from power frequency to high frequency, partial discharge, opposite dielectric loss,
Harmonic wave, and certain high fdrequency components are sudden pulse in leakage current, need seamless acquisition just to can guarantee and very collect.It is excellent
Choosing, data processor is the FPGA of built-in ARM stone.System uses rate using 100M for high-frequency signal, and a/d resolution is
The acquisition of 12bit, A, B, C three-phase synchronous, generates 3.6G bit data each second, the FPGA of built-in ARM stone can extended channel,
It realizes seamless high-speed data acquisition and processing, synchronizes and concurrently acquire, handle 3 high frequency acquisition channels, 3 power frequency acquisition channel numbers
According to, and can guarantee the synchronous acquisition between multi-chip.
In one embodiment, high-tension cable be single structure, the single-point grounding under normal circumstances of single-core cable metal sheath,
Circulation very little on metal sheath, predominantly capacity current, if sheath two-terminal-grounding, circulation dramatically increase, up to main when serious
90% or more of electric current.Therefore circulation drawn game high-volume change be cable bad the form of expression.Cable is usual before insulation breakdown
The development process of shelf depreciation is had, partial discharge initial stage discharge capacity is smaller, generally will not cause to seriously affect to equipment, but in high electricity
It can develop under pressure long term as penetrability electric discharge.Partial discharge detection may determine that the local discharging level of cable in operation, quilt
It is considered the most effective of detection cable insulation defect development.This system generates powerful induced electricity when may determine that cable operation,
Cause to ripple tube discharge in cable, bellows breakdown, or generates heat, insulation ag(e)ing, cable breakdown.Realize cable operation just
Often, failure rate is reduced, is given warning in advance.Because dielectric loss can reflect cable insulation level, pass through the dielectric loss of quantitative measurment high-tension cable
And dielectric loss change rate, it can effectively assess the insulation ag(e)ing state of high-tension cable.Specifically, same by A, B, C three-phase ground electric current
Step acquisition, compares line voltage or common reference point, and all collection points monitor the opposite of entire cable difference by satellite synchronization
Dielectric loss assesses the dielectric level of high-tension cable.Because harmonic pollution will lead to the increase of cable bad risk, harmonic pollution can make electricity
The dielectric loss of cable, transmission losses increase, and leakage current rises, and temperature rise increase and shelf depreciation increase, and cause single-phase earthing event
A possibility that barrier, increases.Therefore Fourier transformation is added by high speed, high resolution AD multipoint acquisition, detects 2-50 subharmonic.It is preferred that
, current acquisition card includes power frequency capture card, high frequency capture card.Preferably, current transformer includes power current mutual inductor, height
Frequency current transformer, power frequency capture card are connect with power current mutual inductor, and high frequency capture card is connect with HF current transformer, work
Frequency current transformer acquires cable three-phase main-frequency electric current, and HF current transformer acquires cable three-phase high-frequency current.Preferably, work
Frequency current transformer, HF current transformer are installed on cable shielding layer earthing line using punching mode.Power current mutual inductor
Current signal of the coupling from 50HZ~30M can be synchronized, to the data acquisition module of rear class；HF current transformer can synchronize coupling
Out of 3M~30M.Preferably, power frequency capture card is rail-to-rail operational amplifier, and collected data are transmitted to data
The ADC interface of processor, measurable range 100mA~50A, high frequency capture card are high gain operational amplifier, and minimum can acquire
5PC partial discharge amount, gain can reach 40dB, and linearity error is not more than 15%.Do not changing power equipment primary connection mode
Under the premise of, it is real-time monitoring cable circulation, humorous by wide frequency domain current transformer using punching structure by the ground line of cable
It is wave, dielectric loss, high frequency partial discharge amount, various excessively electric including power-frequency overvoltage, switching overvoltage and lightning surge
The small signals of wide frequency domains such as pressure, partial discharge amount when synchronous acquisition switching overvoltage and lightning surge, can accurately be run
The insulation degradation evolution process and overvoltage level of cable under state are administered for cable overvoltage, optimize Insulation Coordination and formulation
Cable operation, Strategies of Maintenance provide actual measurement foundation.
In one embodiment, it is preferred that environment parameter collector includes Temperature Humidity Sensor, water sensor, smog biography
Sensor, noise transducer, optical sensor, infrared sensor.Pass through temperature sensor, humidity sensor, water level sensor, cigarette
Mist sensor, noise transducer, optical sensor, the various environment ginseng in infrared imaging camera real-time monitoring cable tunnel
Amount.Whether the environmental information of Temperature Humidity Sensor detection cable channel, water sensor detection cable are flooded not, detect cable
Operating condition, smoke sensor device detect smokescope, certain density smog can be generated before cable is on fire, by detection can be quick
Fault point, noise transducer detect the noise information generated when the failures such as shelf depreciation or cable breakdown, quickly positioning event
Hinder position, if current failure is on fire, the quick fault point of intensity of illumination, infrared imaging can be detected by optical sensor
Sensor is monitored the temperature change at cable connector, is given warning in advance by infrared measurement of temperature.Temperature, humidity, smog in tunnel,
The environmental parameters such as water level impact the personal safety of power equipment and staff, being capable of effective guarantee to their monitoring
Cable running safety guarantees work personal safety, reduces economic loss；The temperature of cable tunnel when being broken down by crawl cable
Degree, humidity, water logging, smog, noise, intensity of illumination, infrared imaging map, can allow cable tunnel administrative department to obtain phase in time
The situation and location information of pass accident realize cable overvoltage and insulation state monitoring early warning rapidly removing faults.
In one embodiment, it is preferred that locating module is GPS/ Beidou module, GPS/ Beidou module and satellite navigation system
Communication connection.GPS/ Beidou module positions each monitoring location, while the synchronization signal as each collection point uses.It is preferred that
, communication module includes ZigBee module, 433M configuration net module, GPRS module, fiber optic telecommunications module.Pass through between each system
Communication module networking.Preferably, power supply is solar battery, current transformer induction electricity-fetching module, AC power source, lithium battery.
The present invention provides a kind of cable and its monitoring of working condition early warning system, including data processor, data collecting card, environment
Parameter collector, current acquisition card, current transformer, locating module, communication module, power supply, server；Power supply and data processing
Device, data collecting card, environment parameter collector, current acquisition card, current transformer, locating module, communication module, server connect
It connects, data processor is connect with data collecting card, current acquisition card, locating module, communication module, server, data collecting card
It is connect with environment parameter collector, current acquisition card is connect with current transformer, and locating module is used for the position of positioning system, ring
Border parameter collector acquires the environment parameter in cable tunnel, and current transformer acquires cable three-phase current signal, data processing
Device calculates cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal according to current signal, and generates alarm signal
Breath, data processor pass through communication module for environment parameter, cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage
Signal, warning message, system position be uploaded to server, server passes through environment parameter, cable circulation, harmonic wave, medium damage
Consumption, the position positioning failure concrete position of high frequency partial discharge amount, overvoltage signal, warning message, system.The present invention is not changing electricity
Under the premise of power equipment primary connection mode, damaged by wide frequency domain current transformer real-time monitoring cable circulation, harmonic wave, medium
The small signal of wide frequency domains such as consumption, high frequency partial discharge amount, overvoltage, passes through temperature sensor, humidity sensor, water level sensor, smog
Sensor, noise transducer, optical sensor, the various environment parameters in infrared sensor real-time monitoring cable tunnel, can
The accurate insulation degradation evolution process and overvoltage level for obtaining cable under operating status, it is exhausted for the improvement of cable overvoltage, optimization
Edge cooperation and the operation of formulation cable, Strategies of Maintenance provide actual measurement foundation, and cable tunnel administrative department can be allowed to obtain correlation in time
The situation and location information of accident realize cable overvoltage and insulation state monitoring early warning, rapidly removing faults.This system is based on
Hardware realization is handled in real time, and monitoring and prealarming process are not necessarily to software intervention.
More than, only presently preferred embodiments of the present invention is not intended to limit the present invention in any form；All current rows
The those of ordinary skill of industry can be shown in by specification attached drawing and above and swimmingly implement the present invention；But all to be familiar with sheet special
The technical staff of industry without departing from the scope of the present invention, is made a little using disclosed above technology contents
The equivalent variations of variation, modification and evolution is equivalent embodiment of the invention；Meanwhile all substantial technologicals according to the present invention
The variation, modification and evolution etc. of any equivalent variations to the above embodiments, still fall within technical solution of the present invention
Within protection scope.
Claims (10)
1. a kind of cable and its monitoring of working condition early warning system, it is characterised in that: including data processor, data collecting card, environment
Parameter collector, current acquisition card, current transformer, locating module, communication module, power supply, server；The power supply with it is described
Data processor, data collecting card, environment parameter collector, current acquisition card, current transformer, locating module, communication module,
Server connection, the data processor and the data collecting card, current acquisition card, locating module, communication module, server
Connection, the data collecting card are connect with the environment parameter collector, and the current acquisition card and the current transformer connect
It connecing, the locating module is used for the position of positioning system, and the environment parameter collector acquires the environment parameter in cable tunnel,
The current transformer acquires cable three-phase current signal, and the data processor calculates cable loop according to the current signal
Stream, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal, and warning message is generated, the data processor passes through described
Communication module is by the environment parameter, the cable circulation, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal, described
Warning message, the system position be uploaded to the server, the server passes through the environment parameter, the cable loop
Stream, harmonic wave, dielectric loss, high frequency partial discharge amount, overvoltage signal, the warning message, the system position positioning failure tool
Body region.
2. a kind of cable as described in claim 1 and its monitoring of working condition early warning system, it is characterised in that: the current acquisition card
Including power frequency capture card, high frequency capture card.
3. a kind of cable as claimed in claim 2 and its monitoring of working condition early warning system, it is characterised in that: the current transformer
Including power current mutual inductor, HF current transformer, the power frequency capture card is connect with the power current mutual inductor, described
High frequency capture card is connect with the HF current transformer, and the power current mutual inductor acquires cable three-phase main-frequency electric current, institute
State HF current transformer acquisition cable three-phase high-frequency current.
4. a kind of cable as claimed in claim 3 and its monitoring of working condition early warning system, it is characterised in that: the power current is mutual
Sensor, the HF current transformer are installed on cable shielding layer earthing line using punching mode.
5. a kind of cable as claimed in claim 2 and its monitoring of working condition early warning system, it is characterised in that: the power frequency capture card
For rail-to-rail operational amplifier, the high frequency capture card is high gain operational amplifier.
6. a kind of cable as described in claim 1 and its monitoring of working condition early warning system, it is characterised in that: the environment parameter is adopted
Storage includes Temperature Humidity Sensor, water sensor, smoke sensor device, noise transducer, optical sensor, infrared sensor.
7. a kind of cable as described in claim 1 and its monitoring of working condition early warning system, it is characterised in that: the communication module packet
Include ZigBee module, 433M configuration net module, GPRS module, fiber optic telecommunications module.
8. a kind of cable as described in claim 1 and its monitoring of working condition early warning system, it is characterised in that: the data processor
For the FPGA of built-in ARM stone.
9. a kind of cable as described in claim 1 and its monitoring of working condition early warning system, it is characterised in that: the locating module is
GPS/ Beidou module, the GPS/ Beidou module and satellite navigation system communicate to connect.
10. a kind of cable as described in claim 1 and its monitoring of working condition early warning system, it is characterised in that: the power supply is too
Positive energy battery, current transformer incude electricity-fetching module, AC power source, lithium battery.
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| CN201811466301.8A CN109631986A (en) | 2018-12-03 | 2018-12-03 | A kind of cable and its monitoring of working condition early warning system |
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| CN201811466301.8A CN109631986A (en) | 2018-12-03 | 2018-12-03 | A kind of cable and its monitoring of working condition early warning system |
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| CN112180288A (en) * | 2020-09-09 | 2021-01-05 | 大唐河北发电有限公司马头热电分公司 | Method for analyzing and processing ground fault of insulation damage of outer sheath of 220kV cable |
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| CN114019423A (en) * | 2021-11-12 | 2022-02-08 | 国网新疆电力有限公司乌鲁木齐供电公司 | Distribution cable connector abnormal state on-line monitoring alarm device |
| CN114401500A (en) * | 2022-01-28 | 2022-04-26 | 广州市钢立科学仪器有限公司 | Electrical equipment environment real-time monitoring system comprising communication unit |
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Effective date of registration: 20190910 Address after: Hangzhou City, Zhejiang province 310000 City Zhaohui District eight Applicant after: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY LIMITED ELECTRIC POWER Research Institute Applicant after: HANGZHOU KELIN ELECTRIC Co.,Ltd. Applicant after: ZHEJIANG SHANGQINGYUAN ELECTRIC POWER TECHNOLOGY CO.,LTD. Address before: Hangzhou City, Zhejiang province 310000 City Zhaohui District eight Applicant before: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY LIMITED ELECTRIC POWER Research Institute Applicant before: HANGZHOU KELIN ELECTRIC Co.,Ltd. |
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