CN104990629B - A kind of electrical equipment fault automatic early-warning system of infrared imaging temperature measuring - Google Patents
A kind of electrical equipment fault automatic early-warning system of infrared imaging temperature measuring Download PDFInfo
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- CN104990629B CN104990629B CN201510401965.6A CN201510401965A CN104990629B CN 104990629 B CN104990629 B CN 104990629B CN 201510401965 A CN201510401965 A CN 201510401965A CN 104990629 B CN104990629 B CN 104990629B
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Abstract
The invention discloses a kind of electrical equipment fault automatic early-warning system of infrared imaging temperature measuring, it is related to electric device maintenance maintenance technique field.Including signal gathering unit, Platform Server, automatic early-warning processing software and human-computer interaction interface, signal gathering unit sends the signal of collection to Platform Server, user is set by human-computer interaction interface and instructed, and handles software and Platform Server progress feedback processing by automatic early-warning.The trend analysis of the reduced temperature of infrared measurement of temperature temperature combining environmental climatic information is applied in the judgement of power equipment infrared measurement of temperature trending early warning by the present invention first;First by infrared measurement of temperature temperature combining environmental climatic information and current loads, the heat spot temperature of equipment maximum continuous loading is calculated, and this index is subjected to trend analysis, predicted temperature trend, further realize precisely and advanced early warning.
Description
Technical field
The present invention relates to electric device maintenance maintenance technique field.
Background technology
At present, China's economy is constantly fast-developing, and also positive strong intelligent grid ranks stride forward power network, i.e., using extra-high voltage as
Major network, the development of different brackets electric network coordination, the safe and stable operation of power system is even more raw safely containing the every profession and trade including colliery
The basic guarantee of production.Intelligent grid has the feature of " self-healing ", including following two aspect:First, intelligent grid can be automatically fast
The isolated fault of fast ground, and the power supply of normal section is ensured in time;Secondly, grid operating conditions can be monitored on-line, it is occurred
Failure alert in time, and adopt an effective means and remove a hidden danger, so as to ensure the safe and reliable operation of power network, avoid power network
The generation of failure.
Thus, how using high-tech intelligent means, power network is monitored on-line, automatic fault detection, disappeared in time
Except equipment dangerous spot, destructive factor is reduced, and carries out systematization, the management of standardization, is put in power system scientific research personnel face
Preceding new problem.And transformer station is the important composition unit of power network, therefore study substation equipment detection and fault diagnosis skill
Art has substantial worth, can not only reduce the incidence of accident, also contributes to electric power netting safe running and its reliability
Improve.
In order to carry out security monitoring to Substation Electric Equipment, visible ray remote viewing system is generally carried out both at home and abroad and has ground
Study carefully and plan, and the technology such as coded image data, compression, transmission and information processing is quite ripe.However, visible ray
Remote viewing system is only capable of detecting the external phenomenon of equipment, identical with human eye finding, when the phenomenon one that some can visually perceive
Situations such as denier occurs such as explode, smolder, now equipment fault just can not have been prevented and avoided.
In the past few years, actively application of the research infrared thermal imaging technique in terms of electrical equipment is started both at home and abroad,
In terms of detection and its Fault Identification judgement mainly to equipment.At present, a kind of hand of commercialization is widely used in power system
Formula infrared radiation detection apparatus are held, electrical equipment is detected when it is maked an inspection tour dedicated for operation maintenance personnel and is used.However, the infrared radiation detection apparatus are also deposited
In many deficiencies:
(1) hand-held infrared radiation detection apparatus are only maked an inspection tour in Substation Process in staff and used, without simultaneity, continuously
Property and real-time, thus in-service monitoring and alarm can not possibly be carried out to various equipment in station, also can not just realize the automatic of failure
Detection, from intelligentized goal discrepancy away from larger.
(2) when carrying out fault diagnosis and identification to equipment, because transimission power and Bu Tong also causing for environment are electric
The temperature difference of equipment, it is not effective method to be diagnosed completely according to the difference of temperature, so needing on this basis, root
According to the service data of electrical equipment, further carry out the research to fault diagnosis expert system.
Therefore, existing all kinds of artificial monitoring systems in various degree in the presence of alarm not in time, phenomena such as reporting by mistake and failing to report,
So that the security and practicality of system cannot ensure.In addition, intelligent grid has effectively facilitated substation equipment real-time online
Detection technique advances, thus as the fast development of intelligent grid, monitoring system will be more and more huger, if all
Using artificial monitoring, its human cost also can be very expensive.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of electrical equipment fault automatic early-warning of infrared imaging temperature measuring
System, the system can monitor in real time, the Temperature numerical by the amount of enhancing recursive regression modeling and forecasting, be contrasted with alarm threshold value,
Realize trending early warning.
In order to solve the above technical problems, the technical solution used in the present invention is:A kind of electric power of infrared imaging temperature measuring is set
Standby failure automatic early-warning system, including signal gathering unit, Platform Server, automatic early-warning processing software and man-machine interaction circle
Face, signal gathering unit send the signal of collection to Platform Server, and user is set by human-computer interaction interface and instructed, and is led to
Cross automatic early-warning processing software and Platform Server carries out feedback processing;Signal gathering unit includes infrared imaging video camera, temperature
Sensor, humidity sensor and air velocity transducer are spent, infrared imaging video camera is used for identifying each detection zone of power equipment, and in fact
When the temperature of each detection zone is sent to Platform Server by NVR;Temperature sensor, humidity sensor and air velocity transducer
Amblent air temperature information is gathered, and the amblent air temperature information of collection is sent to Platform Server by dynamic environment main frame.
Preferably, the infrared imaging video camera is binocular infrared imaging video camera.
Preferably, the Platform Server includes video transmission server, central management server and the automatic diagnosis of intelligence
Alarm server, and control and connect with human-computer interaction interface.
Preferably, the automatic early-warning processing software package includes configuration definition unit, object segmentation unit, temperature extraction list
Member, failure diagnosis unit, database link unit, comprehensive distinguishing unit, and each unit is adapted with Platform Server
Docking.
It is using beneficial effect caused by above-mentioned technical proposal:The present invention by with observed temperature trend analysis with
Early warning, reduced temperature trend analysis and early warning, the analysis of maximum continuous loading heat spot temperature trend and early warning, increment recursive are minimum
The dynamic dataflow trend analysis algorithm of square law, the prediction of generalized likelihood test cut-point trend fitting, abnormity point alarm with
Track testing mechanism, system are analyzed by the temperature difference based on infrared thermal imaging observed temperature, are converted analysis, Temperature Rise Analysis, comprehensive
The accurate threshold alarm of power equipment thermometric is realized, first becoming the reduced temperature of infrared measurement of temperature temperature combining environmental climatic information
Potential analysis is applied in the judgement of power equipment infrared measurement of temperature trending early warning;Infrared measurement of temperature temperature combining environmental weather is believed first
Breath and current loads, the heat spot temperature of equipment maximum continuous loading is calculated, and this index is subjected to trend analysis, pre- thermometric
Degree trend, further realize precisely and advanced early warning;Using transformer station's Infrared video image, with reference to current high-tech image procossing
With analytical technology, the view data of thermal camera seizure can be automatically analyzed, realizes continuous 24 hours real-time intelligents monitoring, when
Can Realtime Alerts and early warning during abnormal generation.Reach and implement round-the-clock, intelligentized automatic video frequency detection and early warning to transformer station,
The workload of monitoring personnel will be greatly reduced, improve the real-time of affair alarm, lifting substation safety operation emergency guarantee
Ability;The present invention realizes the early warning for electrical equipment malfunction, effectively reduces electrical equipment accident number, on the other hand can increase
Add the income of society, reduce artificial workload, can be played in operation of power networks, maintenance cost, the quality of power supply etc.
Positive impetus, the application of infrared imaging temperature measuring electrical equipment fault automatic early-warning technology are reliable, safe for power equipment
Normal operation provides basic guarantee.The areas case that system monitors as needed, it is preset that multiple infrared imaging devices can be set
Point, and Object Segmentation is carried out, the thermometric information of each electrical equipment or its building block is stored in database, and according to letter
Single rule carries out safe early warning.
Brief description of the drawings
Fig. 1 is the principle schematic of this infrared imaging temperature measuring electrical equipment fault automatic early-warning system;
Fig. 2 is the principle flow chart of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As depicted in figs. 1 and 2, the present invention is a kind of electrical equipment fault automatic early-warning system of infrared imaging temperature measuring, bag
Include signal gathering unit, Platform Server, automatic early-warning processing software and human-computer interaction interface, signal gathering unit is by collection
Signal sends Platform Server to, and user is set by human-computer interaction interface and instructed, and handles software peace by automatic early-warning
Platform server carries out feedback processing;Signal gathering unit includes infrared imaging video camera, temperature sensor, humidity sensor and wind
Fast sensor, infrared imaging video camera is used for identifying each detection zone of power equipment, and in real time leads to the temperature of each detection zone
Cross NVR and send Platform Server to;Temperature sensor, humidity sensor and air velocity transducer collection amblent air temperature information, and will
The amblent air temperature information of collection sends Platform Server to by dynamic environment main frame;The infrared imaging video camera is that binocular is red
Outer imaging camera machine;The Platform Server includes video transmission server, central management server and the automatic diagnosis of intelligence and accused
Alert server, and control and connect with human-computer interaction interface;The automatic early-warning processing software package includes configuration definition unit, object
Cutting unit, temperature extraction unit, failure diagnosis unit, database link unit, comprehensive distinguishing unit, and each unit with
The docking that Platform Server is adapted.
The present invention is a kind of electrical equipment fault automatic early-warning system of infrared imaging temperature measuring, and its implementation includes following
Step:
1) each detection zone of power equipment is identified by thermal infrared imager, and in real time passed through the temperature T of each detection zone
NVR sends Platform Server to;Identify each detection zone of power equipment
2) amblent air temperature information is gathered, and the amblent air temperature information of collection is passed through by temperature, humidity, air velocity transducer
Dynamic environment main frame sends Platform Server to;
3) Platform Server is rolled over the temperature value of each detection zone of receiving and environment temperature, humidity, the value of wind speed
Calculate, obtain the reduced temperature value of each detection zone;Convert formula is as follows:
T20=β TS+(20–T0)/α2 (1)
Wherein:T20- conversion to equipment tie point overtemperature (DEG C) at 20 DEG C
TSApparatus overheat point temperature (DEG C) during-test
T0Environment temperature (DEG C) during-test
α-temperature conversion factor
β-wind speed conversion factor
4) current loads, maximum continuous loading and each detection zone of acquisition that Platform Server binding operation interface is set
Infrared measurement of temperature temperature, calculate the maximum continuous loading heat spot temperature of each detection zone;Maximum continuous loading heat spot temperature
It is as follows to spend calculation formula:
Tmax=(TS–T0)e(Imax-Is)/Is+TS (2)
Wherein:TmaxHeat spot temperature (DEG C) under-maximum continuous loading state
TSThe physical device heat spot temperature (DEG C) in this loop during-measurement
T0Environment during-measurement is with reference to temperature (DEG C)
The maximum continuous loading electric current often occurred in Imax-this loop operation
The actual load electric current in this loop during Is-measurement
ρ-temperature rise constant, 1.7~1.85 are taken according to radiating condition and contact resistance nonlinear change factor) platform service
Device is converted to maximum load heat spot temperature combining environmental environment temperature, humidity, the wind speed of persistently continuing of each detection zone, is obtained
To the reduced temperature of maximum continuous loading heat spot temperature;Maximum continuous loading heat spot temperature reduced temperature calculation formula is such as
Under:
Tmax20=β Tmax+(20–T0)/α2 (3)
Wherein:Tmax20The reduced temperature (DEG C) of-maximum continuous loading heat spot temperature
TmaxHeat spot temperature (DEG C) under-maximum continuous loading state
T0Environment temperature (DEG C) during-test
α-temperature conversion factor
β-wind speed conversion factor
6) by T, T20、Tmax、Tmax20Four data groups, using the time as X-axis, numerical value is Y-axis, carries out increment recursive respectively and returns
Return modeling, the real time temperature measurement data group of each self-forming, the basic data as trend analysis;
7) according to T, T20、Tmax、Tmax20Trend model, predict T, T20、Tmax、Tmax20In following 1 hour, 1 day, 1 week
The Temperature numerical being up to, according to the Temperature numerical of prediction, contrasted with alarm threshold value, realize trending early warning.
The foundation that power system at present carries out substation equipment fault diagnosis using infrared technique is DLT664-2008《Band
Electric equipment infrared diagnostics application specification》, the standard gives the method using thermal infrared imager detection charging equipment, instrument is wanted
Ask, administrative provisions of the instrument scope of application, the basis for estimation of defect and infrared data etc..The standard is applied to voltage, electricity
Flow each voltage class equipment of thermal effect or other thermal effects, including motor, transformer, reactor, breaker, keep apart
Pass, transformer, sleeve pipe, power capacitor, arrester, power cable, bus, wire, insulator, combined electrical apparatus, low-voltage electrical apparatus
With secondary circuit etc..In view of use at this stage infrared thermal imaging technique to power system device carry out fault diagnosis mostly still with
Based on hand-held infrared thermoviewer, the intelligent requirements monitored in real time can not be met, to ensure that intelligence is realized in substation safety operation
Change management, it is proposed that a kind of electrical equipment fault automatic early-warning system of infrared imaging temperature measuring is established, by real-time data base
The middle image segmentation for installing research additional and the algorithm software of registration technique, utilize DLT664-2008《Charging equipment infrared diagnostics application
Specification》In bound of the setting numerical value as fault diagnosis judgement early warning in database, carry out in systems preset, pass through and be
System automatic detecting, processing, judgement, realize the intelligent management of the early warning to future.
Transformer station mainly forms:Feed line (inlet wire, outlet) and bus, disconnecting switch, earthed switch, breaker, electricity
Power transformer (main transformer), voltage transformer TV (PT), current transformer TA (CT), lightning rod.Any equipment in these transformer stations
Generation is abnormal, substation safety can all be run and threatened, all be the object that this paper systems are monitored.Load tap changer
Loose contact can cause temperature rise, and causing stage clip elasticity to weaken makes the contact of joint worse, causes bigger temperature rise, ultimately causes
Device damage;There is foreign matter and can all cause leakage field to aggravate in transformer core deformation, connection loosing or oil circuit, cause transformer local
Temperature rise, ultimately cause device damage;Transformer oil roadlock plug can cause the temperature rise of transformer portion region, ultimately cause equipment damage
It is bad;Breaker and isolation switch contact plucking can cause temperature rise to influence equipment life;Sleeve inner connects loosening with cable connector
Or wire strand breakage, local acutely temperature rise can be caused finally to lead to a disaster;Capacitor internal shelf depreciation can cause insulation degradation and
Aggravation temperature rise finally leads to a disaster;Arrester and the Ageing of Insulators or filth, it will also result in local temperature rise and finally lead to a disaster.Become
Above-mentioned capital equipment in power station is all the object of the system monitoring, and because device category is various in transformer station, the present embodiment is not
It can relate to the elaboration of all phenomenon of the failure correlation techniques of all devices.
The present invention with observed temperature trend analysis and early warning, reduced temperature trend analysis and early warning, maximum by continuing
Load heat spot temperature trend is analyzed and early warning, the dynamic dataflow trend analysis algorithm of increment recursive least square method, broad sense
The prediction of Likelihood ration test cut-point trend fitting, abnormity point alarm tracing detection mechanism, system is with infrared thermal imaging observed temperature
Based on, analyzed by the temperature difference, convert analysis, Temperature Rise Analysis, synthesis realizes the accurate threshold alarm of power equipment thermometric, first will
It is pre- that the trend analysis of the reduced temperature of infrared measurement of temperature temperature combining environmental climatic information is applied to power equipment infrared measurement of temperature trend
In alert judgement;First by infrared measurement of temperature temperature combining environmental climatic information and current loads, calculate equipment maximum and persistently bear
The heat spot temperature of lotus, and this index is subjected to trend analysis, predicted temperature trend, further realize precisely and advanced early warning;
Using transformer station's Infrared video image, with reference to current high-tech image processing and analysis technology, infrared photography can be automatically analyzed
The view data that machine is caught, continuous 24 hours real-time intelligents monitoring is realized, when an anomaly occurs can Realtime Alerts and early warning.Reach
Implement round-the-clock, intelligentized automatic video frequency detection and early warning to transformer station, the workload of monitoring personnel will be greatly reduced, carried
The real-time of high affair alarm, lifting substation safety operation emergency response capabilities;The present invention is realized for electrical equipment malfunction
Early warning, effectively reduce electrical equipment accident number, on the other hand can increase the income of society, reduce artificial work
Amount, positive impetus, infrared imaging temperature measuring electric power can be played in operation of power networks, maintenance cost, the quality of power supply etc.
The application of equipment fault automatic early-warning technology is power equipment is reliable, safe normal operation provides basic guarantee.System according to
The areas case monitored is needed, multiple infrared imaging device preset points can be set, and carries out Object Segmentation, by each electrical equipment
Or the thermometric information of its building block is stored in database, and safe early warning is carried out according to simple rule.
Claims (4)
- A kind of 1. electrical equipment fault automatic early-warning system of infrared imaging temperature measuring, it is characterised in that:Including signal gathering unit, Platform Server, automatic early-warning processing software and human-computer interaction interface, signal gathering unit send the signal of collection to platform Server, user are set by human-computer interaction interface and instructed, and handle software and Platform Server progress instead by automatic early-warning Feedback is handled;Signal gathering unit includes infrared imaging video camera, temperature sensor, humidity sensor and air velocity transducer, infrared Imaging camera machine is used for identifying each detection zone of power equipment, and in real time sends by NVR the temperature of each detection zone to flat Platform server;Temperature sensor, humidity sensor and air velocity transducer collection amblent air temperature information, and by the amblent air temperature of collection Information sends Platform Server to by dynamic environment main frame;The Platform Server is used to carry out the temperature value of each detection zone of receiving and environment temperature, humidity, the value of wind speed Conversion, obtains the reduced temperature value of each detection zone;Each inspection of current loads, maximum continuous loading and acquisition that the Platform Server is set with reference to the human-computer interaction interface The infrared measurement of temperature temperature in region is surveyed, calculates the maximum continuous loading heat spot temperature of each detection zone;Maximum continuous loading mistake Hot(test)-spot temperature calculation formula is as follows:Tmax=(Ts-T0)e(Imax-1s)/Is+Ts (2)Wherein:TmaxHeat spot temperature (DEG C) under-maximum continuous loading stateTsThe physical device heat spot temperature (DEG C) in this loop during-measurementT0Environment during-measurement is with reference to temperature (DEG C)ImaxThe maximum continuous loading electric current often occurred in the operation of-this loopThe actual load electric current in this loop when Is- is measured;The Platform Server persistently continues load heat spot temperature combining environmental temperature, humidity, wind to the maximum of each detection zone Speed is converted, and obtains the reduced temperature of maximum continuous loading heat spot temperature;Maximum continuous loading heat spot temperature conversion temperature It is as follows to spend calculation formula:Tmax20=β Tmax+(20+T0)/α2 (3)Wherein:Tmax20The reduced temperature (DEG C) of-maximum continuous loading heat spot temperatureTmaxHeat spot temperature (DEG C) under-maximum continuous loading stateT0Environment temperature (DEG C) during-testα-temperature conversion factorβ-wind speed conversion factor.
- 2. a kind of electrical equipment fault automatic early-warning system of infrared imaging temperature measuring according to claim 1, its feature exist In:The infrared imaging video camera is binocular infrared imaging video camera.
- 3. a kind of electrical equipment fault automatic early-warning system of infrared imaging temperature measuring according to claim 1, its feature exist In:The Platform Server includes video transmission server, central management server and the automatic diagnosing, alarming server of intelligence, and Control and connect with human-computer interaction interface.
- 4. a kind of electrical equipment fault automatic early-warning system of infrared imaging temperature measuring according to claim 1, its feature exist In:The automatic early-warning processing software package includes configuration definition unit, object segmentation unit, temperature extraction unit, fault diagnosis list Member, database link unit, comprehensive distinguishing unit, and the docking that each unit is adapted with Platform Server.
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CN105548747A (en) * | 2015-12-04 | 2016-05-04 | 国网技术学院 | Equipment fault identification system and method based on infrared temperature measurement technology |
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CN114216569B (en) * | 2022-02-22 | 2022-06-10 | 深圳金三立视频科技股份有限公司 | Infrared temperature measurement method and terminal based on credibility evaluation |
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