CN105115626A - Intelligent monitoring system and method for single-core high-voltage cable connector - Google Patents
Intelligent monitoring system and method for single-core high-voltage cable connector Download PDFInfo
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Abstract
The invention relates to an intelligent monitoring system and method for a single-core high-voltage cable connector. The intelligent monitoring system comprises a central platform, a client, and an intelligent terminal. A temperature monitoring module, a current monitoring module, an antitheft sensor, and a cable partial discharge sensor are arranged on a cable connector. The intelligent monitoring system acquires cable temperature, ground line current, cable partial discharge, and equipment antitheft, compares monitored parameters with correlative parameters set in the system, regularly uploads the monitored parameters to the central platform, and shortens parameter-uploading time interval if an abnormal case generates. The system and the method comprehensively and online monitor important parameters of the operation condition of the cable in real time, prevents a false alarm possibility, and saves mistake repair cost, wherein the monitoring includes cable temperature index, antitheft monitoring, current pulse information monitoring of a cable shielded layer ground line.
Description
Technical field
The present invention relates to a kind of feeder cable security protection facility field, for monitoring ground, underground cable transmission of electricity safety.
Background technology
At present, the development construction in city be unable to do without electric power, and in electric power facility is built, the construction scale of underground electrical network constantly expands, cable as transmission of electricity core carrier by a large amount of for underground electrical network, but, the corresponding safety problem of cable happens occasionally, be not difficult after deliberation to find, the cable fault of more than 90% all occurs in cable splice position, and therefore the running status of comprehensive monitoring cable joint has vital meaning to underground electric power netting safe running.
In recent years, repeatedly occur both at home and abroad because cable transfer exceedes the load of its actual current capacity and cause the accident of cable generation thermal runaway, this demonstrate that the urgency and importance of carrying out cable temperature and ground current monitoring.
At present, portion of techniques has been had to monitor the temperature that cable runs.
Patent 201110104855.5 provides a kind of cable head temperature on-Line Monitor Device, it utilizes in cable splice place detection streamer skin temperature, the internal temperature of indirect reaction cable end, and way information being sent to control center, realize the object to temperature of cable junction on-line monitoring.This kind of method just detects the skin temperature of cable, in fact the temperature conditions in the skin temperature of cable and cable has very big-difference, the way being calculated internal layer temperature by skin temperature is inaccurate, also not in time, such as when a failure occurs it, temperature in cable may raise instantaneously, and the temperature raised instantaneously in cable at short notice also cannot embody cable top layer, brings retardation to emergency treatment fault.
Patent 201310738561.7 provide a kind of can the intelligent cable of remote monitoring, adopt disposed at equal distance detection module on cable, realize the collection of temperature, humidity, electric current, information of voltage, and by being wirelessly transmitted to control center.This kind of method is by detection module with cable laying, is located at cable inside or is located at cable splice place outward in not being openly.In fact, detecting correlation parameter at cable splice place is generally acknowledge the most at present, and is also that testing cost is minimum, if detect in cable inside, this becomes very high by making the production cost of cable drop into.In addition, this technology does not provide the detection method of correlation parameter.
In addition, also have many detection techniques about cable splice correlation parameter, after applicant has read correlation technique, summary has been thought:
1, current, most cable temperature monitoring equipment can accomplish the monitoring to cable splice surface temperature, but cable working condition is not accurately with timely only to adopt cable skin temperature to judge, one side accurately cannot know the actual value of the temperature of cable SMIS, and two is time tags corresponding to temperature value that cannot know for sure.
2, cable can form larger circulation at its screen layer, 50% ~ 90% of principal current can be reached time serious, namely tens of ampere even hundreds of amperes, loss is very large, even electric cable explosion can be there is, affect the safe operation of electric system, and current cable end pick-up unit is short of relatively for the technology assessing cable shield.
3, itself value of earthing cable and grounding box is higher, therefore attracts the pilferage behavior of some lawless persons.Subterranean tunnel can not the person of sending someone be patrolled and examined at any time, the management difficulty of power department certainly will be added like this, there are some equipment can by the vibrations of monitoring grounding cable, grounding box and monitoring equipment self and misalignment though existing, determine whether pilferage behavior occurs, and equipment differs, and to establish a capital be shake or displacement because suffer to steal into just producing, what have may be because itself vibrates or monitoring device fault, and therefore the situation of wrong report occurs.
So, ensure the safe operation of electrical network and to improve the efficiency of management of power department all very important, and existing cable monitoring technology is ripe not enough, be mainly reflected in: 1, detect degree of accuracy not high, the most real temperature information of node cables core sometime cannot be embodied in time.2, monitoring range is limited, cannot be monitored in the lump, cause Monitoring Data imperfect by a system to many significant datas, cannot embody cable and run the most real operating mode; 3, parameters analysis method is imperfect, cannot embody cable equally and run the most real operating mode, and and likely produce wrong report.
Summary of the invention
In order to solve the problem, the invention provides single-core high-voltage cable joint intelligent monitor system and intelligent monitoring method.Solve the ruuning situation Real-Time Monitoring of cable and anti-theft alarm function.
Single-core high-voltage cable joint intelligent monitor system provided by the invention, be made up of signal collection part and central platform, signal collection part is connected with central platform, and signal collection part collects cable splice running parameter, and is filed in central platform process;
Also be provided with client, intelligent terminal is connected with central platform, client and intelligent terminal are used for long-range checking.
Signal collection part is connected and composed by transmission control unit (TCU) and acquisition controller, and acquisition controller collects cable splice operating parameter information, and transmission control unit (TCU) arranges transport module, and the cable splice operating parameter information collected by acquisition controller is transferred to central platform; Acquisition controller is connected with temperature monitoring module, current monitoring module, theft-proof sensor, cable local discharge sensor.
Single-core high-voltage cable joint intelligent monitor system as above, wherein temperature monitoring module is connected with at least three temperature sensors, is separately positioned on installation environment place, cable core around cable splice top layer, cable; Described current monitoring model calling has current sensor, and current sensor is arranged on the ground wire of cable splice; Described theft-proof sensor is connected with vibration displacement sensor, vibration displacement sensor is separately positioned on ground wire, in grounding box, in acquisition controller; Cable local discharge sensor setting is on ground wire, and described cable local discharge sensor is high frequency sensors.
Single-core high-voltage cable joint intelligent monitor system as above, wherein, described acquisition controller arranges data acquisition bus interface, and temperature monitoring module, current monitoring module, cable local discharge sensor, vibration displacement sensor are connected to data acquisition bus interface; CPU processor is also provided with, collector communication module, diagnostic module, supply module in acquisition controller; Described transmission control unit (TCU) is made up of transmitter communication module, supply module, controller, and on transmission control unit (TCU), be provided with transfer bus interface and radio transmitting device; Collector communication module is connected with transmitter communication module, and transmission control unit (TCU) is connected with central platform by wireless.
Single-core high-voltage cable joint intelligent monitor system as above, wherein, described transmission control unit (TCU) is connected with central platform by transfer bus interface.
Single-core high-voltage cable joint intelligent monitoring method provided by the invention, comprises cable temperature monitoring method, ground wire current monitoring method, cable local discharge monitoring method, theft protection for devices method.
Described cable temperature monitoring method is:
A, in acquisition controller preset temperature correlative value.
B, acquisition controller collect environment temperature T1, cable skin temperature T2, core temperature T3.
C, computing environment temperature T1, cable skin temperature T2, core temperature T3 difference each other.
D, difference cable skin temperature T2, core temperature T3, step c obtained and preset temperature correlative value are compared, and show whether cable skin temperature and cable core temperature are normal value.
Above-mentioned detection data and comparison result are regularly uploaded to central platform by e, acquisition controller.
Described ground wire current monitoring method is:
A, in acquisition controller preset ground current correlative value.
B, acquisition controller collect ground current I1; And ground current I1 and default ground current correlative value are contrasted, show whether ground current I1 is normal value.
Ground current I1 monitoring result regularly can be uploaded to central platform by c, acquisition controller.
Described cable local discharge monitoring method is:
A, in acquisition controller, preset shelf depreciation type determining program and partial discharge quantity correlative value.
B, acquisition controller collect current impulse characteristic sum partial discharge quantity, and the charge value collected and default correlative value are contrasted, and judge whether its discharge capacity is normal value.
Acquisition controller carries out analysis contrast by the shelf depreciation type determining program preset to the pulse characteristics gathered simultaneously, draws shelf depreciation type.
The monitoring result of pulse characteristics and partial discharge quantity regularly can be uploaded to central platform by c, acquisition controller.
Described theft protection for devices method is acquisition controller theft preventing method, grounding box theft preventing method, ground wire theft preventing method are: by vibration displacement Sensor monitoring displacement signal, whether determining apparatus, grounding box be stolen; In ground wire anti-theft monitoring process, the vibration displacement sensor on ground wire and ground current is adopted jointly to judge that whether ground wire is stolen; There is stolen information, stolen information is uploaded to central platform, and by central platform to client, intelligent terminal alarm.
Further illustrate single-core high-voltage cable joint intelligent monitoring method as above, wherein said cable temperature monitoring method is specially:
Computing environment temperature T1, cable skin temperature T2, core temperature T3 difference each other, the first difference wherein between environment temperature T1 and cable skin temperature T2 is Δ T21, and the second difference between cable skin temperature T2 and core temperature T3 is Δ T32.
Environment temperature T1, cable skin temperature T2, core temperature T3, the first difference DELTA T21, the second difference DELTA T32 and preset temperature correlative value are contrasted, show whether cable skin temperature, cable core temperature are normal value.
Environment temperature T1, cable skin temperature T2, core temperature T3, the first difference DELTA T21, the second difference DELTA T32 are regularly uploaded to central platform by acquisition controller.
Single-core high-voltage cable joint intelligent monitoring method as above, in wherein said acquisition controller, preset temperature correlative value is: environment temperature T1, cable skin temperature T2, core temperature T3 are all less than 60 DEG C, first difference DELTA T21 is less than 5 DEG C, and the second difference DELTA T32 is less than 10 DEG C.
Temperature anomaly judges setting: the first difference DELTA T21 changed and is greater than 5 DEG C and is considered as exception in 1 hour, and the second difference DELTA T32 changed and is greater than 10 DEG C and is considered as exception in 1 hour; Cable skin temperature T2 and core temperature T3 changed rising 5 DEG C and is considered as exception in 1 hour; Core temperature T3 is greater than 60 DEG C and is considered as exception.
Acquisition controller can judge carrying out contrast at interval of 0 ~ 10 minute to the temperature collected and preset temperature, abnormal then upload to central platform; Normal then uploaded once every 0 ~ 99 hour.
When acquisition controller is continuous monitor for more than 2 times exist abnormal in environment temperature T1, cable skin temperature T2, core temperature T3, the first difference DELTA T21, the second difference DELTA T32 time, acquisition controller can foreshorten to uploaded a secondary data to central platform at interval of 1 ~ 600 second, and by central platform to client, intelligent terminal early warning.
Further illustrate single-core high-voltage cable joint intelligent monitoring method as above, described ground wire current monitoring method is:
In acquisition controller, preset ground current correlative value is 0 ~ 200A;
Ground current I1 monitoring result can uploaded to central platform at interval of 1 ~ 8 hour by acquisition controller;
When acquisition controller is continuous monitor for more than 1 time there is exceptional value in ground current I1 monitoring result time, shorten to 1 ~ 600 second and upload once, and by central platform to client, intelligent terminal early warning.
Single-core high-voltage cable joint intelligent monitoring method as above, wherein said cable local discharge monitoring method is:
A, in acquisition controller, be provided with shelf depreciation type determining program, and to preset discharge capacity correlative value be 1 ~ 2000PC;
Partial discharge quantity is greater than 2000PC for abnormal.
B, acquisition controller can be analyzed the partial discharge pulse's feature collected every 0 ~ 24 hour, and discharge capacity and the correlative value preset were contrasted, and were uploaded to central platform when abnormal; Upload once for every 0 ~ 99 hour under normal circumstances.When acquisition controller monitors discharge capacity exception, shorten to 0 ~ 12 hour and upload once.
The pulse characteristics collected is converted into discharge frequency, pulse width and electric discharge amplitude by c, acquisition controller, and encodes, and each number of samples is greater than 1 ~ 2000 stack features value, and sampling interval duration is preset.
D, collector regularly will be greater than 1 ~ 2000 group pulse feature and upload to central platform, undertaken judging and processing by central platform, and to sampling eigenwert, namely the distribution of impulse discharge waveform, discharge phase and the size of electric discharge amplitude carry out cluster analysis, draw shelf depreciation type according to cluster analysis result.
To above-mentioned acquisition controller theft preventing method, grounding box theft preventing method, ground wire theft preventing method further illustrate into:
Described acquisition controller theft preventing method is specially: when the built-in vibration displacement Sensor monitoring of acquisition controller is after displacement signal, displacement signal is uploaded to central platform, and by central platform to client, intelligent terminal alarm.
Described grounding box theft preventing method is specially: when the built-in vibration displacement Sensor monitoring of grounding box is after displacement signal, displacement signal is uploaded to central platform, and by central platform to client, intelligent terminal alarm.
Described ground wire theft preventing method is specially: the vibration displacement sensor on monitoring grounding wire and ground current, when the vibration displacement sensor on ground wire detects displacement information also after ground current equals 0, determine that ground wire is stolen, and monitoring result is uploaded to central platform, and by central platform to client, intelligent terminal alarm.
beneficial effect:
1, present invention achieves the on-line real time monitoring in all directions to cable running conditions important parameter, monitoring range comprises: (1), cable splice core temperature, joint skin temperature, environment temperature, and coordinate the difference of each temperature, common reaction cable temperature index; (2), cable machinery anti-theft monitoring, antitheft containing grounding box, ground wire is antitheft, the anti-theft monitoring of monitoring equipment own; (3), ground wire current monitoring; (4), the current impulse information monitoring of cable shielding layer earthing line.
2, acquisition controller carries out intensive Real-Time Monitoring to data, but not all data all pass to central platform, just the real time data at interval of a period of time is uploaded to central platform by transmission control unit (TCU).When first exception appears in data, acquisition controller meeting intellectual analysis, if when there is abnormal data in N continuous time, acquisition controller is judged to real exception, and shortening the interval time of data transmission, central platform makes early warning in time, until abnormal conditions are processed and solve; Therefore can be avoided possibility of conventional wrong report, thus the decrease each wrong report incidental at least 2 people investigation of totally 8 hours, save and accomplished originally by mistake, accomplished these about 500 ~ 5000 yuan/time by mistake.
3, temperature of cable junction Informational Expression of the present invention is complete, comprises cable splice core temperature, joint skin temperature, environment temperature, and the difference of each temperature, jointly reacts cable temperature index with this; Ensure that embodied cable running conditions is accurate, prevent and fail to report or quote parameter not in time or inaccurate, avoid occurring accident; Prevent the maintenance cost that wrong report produces.
4, the current impulse information monitoring of monitoring cable shielding layer grounding line of the present invention, and sampled data is uploaded to central platform, by central platform to this data processing, thus judge cable shield degree of aging, prevent accident.
5, in anti-theft monitoring of the present invention, whether stolenly not only solely utilize equipment vibration data to carry out determining apparatus, also combine the common determining apparatus situation of the current information monitored, prevent wrong report.
Accompanying drawing explanation
Fig. 1 is present system structural drawing.
Fig. 2 is signal collection part-structure figure.
Fig. 3 is signal transmission controller structural drawing.
Fig. 4 is signal acquisition controller structural drawing.
Fig. 5 is temperature monitoring scheme of installation.
Fig. 6 is current monitoring scheme of installation.
Fig. 7 is vibrations and displacement monitoring scheme of installation.
Embodiment
The present invention is connected and composed by signal collection part and central platform, and signal collection part collects cable splice running parameter, and is filed in central platform process; Related data is sent to client and intelligent terminal by central platform, reaches long-range effect of checking.Central platform is data server, adopts software process, then store data according to the information collected, and be sent to client and intelligent terminal, client is individual PC, and intelligent terminal is the smart mobile phone being provided with corresponding readings software, or monitors special portable device.
Signal collection part is connected and composed by transmission control unit (TCU) and acquisition controller, acquisition controller collects cable splice operating parameter information, transmission control unit (TCU) is arranged transport module and is connected with central platform by wired or wireless, and the cable splice operating parameter information collected by acquisition controller is transferred to central platform.Wherein wired connection mode is by the bus connector on transmission control unit (TCU), utilize the bus mode in cable tunnel to transfer data to central platform, wherein wireless connection method is, by the communication module on transmission control unit (TCU), data are transmitted data by mobile networks such as CDMA/GSM/3G; In radio connection, acquisition controller is arranged on cable splice place, and transmission control unit (TCU) is arranged on from nearest CDMA/GSM/3G mobile network covering place of acquisition controller, and transmission control unit (TCU) and acquisition controller exchange data by wired connection.
Acquisition controller is connected with temperature monitoring module, current monitoring module, theft-proof sensor, cable local discharge sensor.
Temperature monitoring module is connected with three place's temperature sensors, is separately positioned on installation environment place, cable core around cable splice top layer, cable; Wherein three temperature sensors at cable core place are separately positioned on the joint core of cable A, B, C three-phase; Three temperature sensors of cable surface layer are separately positioned on the cable splice top layer of cable A, B, C three-phase; Around cable, installation environment arranges one.
Current monitoring module respectively arranges one on the ground wire of A, B, C three-phase of cable splice.
The ground wire of vibration displacement sensor A, B, C three-phase respectively respectively arranges one, in grounding box, in acquisition controller, respectively arranges one.
The ground wire of cable local discharge sensors A, B, C three-phase respectively arranges one, adopts high frequency sensors.
CPU processor is also provided with, collector communication module, diagnostic module, supply module in acquisition controller; Described transmission control unit (TCU) is made up of transmitter communication module, supply module, controller, and on transmission control unit (TCU), be provided with transfer bus interface and radio transmitting device; Collector communication module is connected with transmitter communication module.
Intelligent monitoring method of the present invention comprises cable temperature monitoring method; Ground wire current monitoring method; Screen layer electric discharge monitoring method; Theft protection for devices method.
Wherein cable temperature monitoring method is:
In acquisition controller, preset temperature correlative value: environment temperature T1, cable skin temperature T2, core temperature T3 are all less than 60 DEG C, and the first difference DELTA T21 is less than 5 DEG C; And: the change of the first difference DELTA T21 in 1 hour is greater than 5 DEG C and is considered as exception; T2 and T3 rose 5 DEG C and is considered as exception in 1 hour.
Acquisition controller collects environment temperature T1, cable skin temperature T2, core temperature T3; By the first difference calculated between environment temperature T1 and cable skin temperature T2 be Δ T21(namely: Δ T
21=T
2-T
1), the second difference between cable skin temperature T2 and core temperature T3 is Δ T32(Δ T
32=T
3-T
2).
Acquisition controller will contrast environment temperature T1, cable skin temperature T2, core temperature T3, the first difference DELTA T21, the second difference DELTA T32 and preset temperature correlative value at interval of 0 ~ 10 minute, show whether cable skin temperature, cable core temperature are normal value, normally then will upload once every 0 ~ 99 hour.Be considered as exception when cable skin temperature T2, core temperature T3 rose 5 DEG C in 1 hour, the first difference DELTA T21 changed and is greater than 5 DEG C and is considered as exception in 1 hour.Acquisition controller is continuous automatically can be foreshortened to when monitoring exceptional value for more than 2 times and uploaded a secondary data to central platform at interval of 1 ~ 600 second, and by central platform to client, intelligent terminal alarm.
The the first difference DELTA T21 obtained about environmentally temperature T1, cable skin temperature T2, core temperature T3, be worth the second difference DELTA T32, the difference of the 3rd difference DELTA T31(environment temperature T1 and core temperature T3 can also be obtained).Different according to application scenarios, can correspondingly utilize different differences to monitor, namely system can select employing first difference DELTA T21, or the second difference DELTA T32, or the 3rd difference DELTA T31, or its combination in any.
Wherein ground wire current monitoring method is:
In acquisition controller, preset ground current correlative value is 0 ~ 200A.
Acquisition controller collects ground current I1; And ground current I1 and default ground current correlative value are contrasted, show whether ground current I1 is normal value.
Ground current I1 monitoring result can uploaded to central platform at interval of 1-8 hour by acquisition controller; And by central platform to client, intelligent terminal.
When acquisition controller is continuous monitor for more than 1 time there is exceptional value in ground current I1 monitoring result time, shorten to every 1 ~ 600 second by ground current I1 monitoring result and upload and once arrive central platform, and by central platform to client, intelligent terminal early warning.
Wherein cable local discharge monitoring method is:
In acquisition controller, preset partial discharge quantity correlative value is 2000PC.
Acquisition controller collects partial discharge pulse's characteristic sum discharge capacity, discharge capacity and default ground connection discharge capacity correlative value is contrasted, and judges that whether it is abnormal; And the pulse characteristics collected is converted into amplitude, frequency, width, and carries out cluster analysis, each number of samples is greater than 1 ~ 2000 stack features value, sampling interval duration is preset.
Acquisition controller can be analyzed the partial discharge pulse's feature collected every 0 ~ 24 hour, and monitoring result is uploaded to central platform by every 0 ~ 99 hour; And by central platform to client, intelligent terminal.
When acquisition controller monitor discharge capacity abnormal time, shorten to every 0 ~ 12 hour by monitoring result shelf depreciation type and discharge capacity monitoring result and upload and once arrive central platform, and by central platform to client, intelligent terminal early warning.
Described theft protection for devices method is as follows:
Wherein acquisition controller theft preventing method is specially: when the built-in vibration displacement Sensor monitoring of acquisition controller is after displacement signal, displacement signal is uploaded to central platform; And carry out alarm by central platform to client, intelligent terminal.
Wherein grounding box theft preventing method is specially: when the built-in vibration displacement Sensor monitoring of grounding box is after displacement signal, displacement signal is uploaded to central platform; And carry out alarm by central platform to client, intelligent terminal.
Wherein ground wire theft preventing method is specially: the vibration displacement sensor on monitoring grounding wire and ground current, when the vibration displacement sensor on ground wire detects displacement information also after ground current equals 0, determine that ground wire is stolen, and monitoring result uploads to central platform; And carry out alarm by central platform to client, intelligent terminal.
Embodiment one:
To cable temperature monitoring:
In acquisition controller, preset temperature correlative value: environment temperature T1, cable skin temperature T2, core temperature T3 are <60 DEG C in advance, the first difference DELTA T21<5 DEG C, the second difference DELTA T32<10 DEG C; And: the change of the first difference DELTA T21 in 1 hour is greater than 5 DEG C and is considered as exception; T2 and T3 rose 5 DEG C and is considered as exception in 1 hour.
Acquisition controller gathered a secondary data at interval of 5 minutes, and current image data is environment temperature T1 is 25 DEG C, cable skin temperature T2 is 27 DEG C, core temperature T3 is 29 DEG C; And calculate the first difference DELTA T
21=2 DEG C, all are in normal data; Then once data were sent to central platform every 12 hours.
Earth wire current monitoring:
In acquisition controller, 60A is to the ground current preset value that cable splice A, B, C three-phase is connected wires.
Acquisition controller collects A phase ground current I1A=47; B phase ground current I1B=46; C phase ground current I1C=48; Contrast with predetermined current: ground current I1 is normal value.
Ground current I1 monitoring result can uploaded to central platform at interval of 3 hours by acquisition controller; And be transferred to client, intelligent terminal by central platform.
Cable local discharge is monitored:
Acquisition controller carries out collection analysis by high frequency sensors to the pulse characteristics of shelf depreciation and discharge capacity.
The pulse characteristics collected is converted into amplitude, frequency, width, and encodes, each sampling 2000 stack features values, the partial discharge quantity of collection is 1000PC, wherein draws: shelf depreciation type is internal discharge, and discharge capacity 1000PC is normal.
Acquisition controller sampling interval duration is 24 hours, and data and local electric discharge type analysis result are sent to central platform; And be transferred to client, intelligent terminal by central platform.
Acquisition controller anti-theft monitoring: the vibration displacement sensor non-displacement signal that acquisition controller is built-in, device security, without the need to uploading several tool.
Grounding box anti-theft monitoring: the vibration displacement sensor non-displacement signal that grounding box is built-in, grounding box safety.
Ground wire anti-theft monitoring: the vibration displacement sensor non-displacement signal on ground wire, the ground wire safety of ground current I1A=30, A phase cable.
Embodiment two:
To cable temperature monitoring:
Acquisition controller gathered a secondary data at interval of 5 minutes, and current image data is environment temperature T1 is 25 DEG C, cable skin temperature T2 is 31 DEG C, core temperature T3 is 32 DEG C; And calculate the first difference DELTA T
21=4 DEG C, the second difference DELTA T
32=3 DEG C, wherein the first difference is Δ T
21=6 DEG C is exceptional value
Image data time shorten is at interval of 2 minutes once by acquisition controller.
Collect data three times and be abnormality continuously, abnormality data are sent to central platform by collector immediately.And a secondary data is sent to central platform in after this at interval of 4 points.
Central platform sends early warning to client, intelligent terminal.
Earth wire current monitoring:
Acquisition controller collects A phase ground current I1A=61; B phase ground current I1B=62, C phase ground current I1C=61, contrasts with predetermined current: ground current I1 is abnormal.
The acquisition time of acquisition controller to ground current shortens at interval of 2 minutes once.
Collect ground current three times and be abnormality continuously, abnormality data are sent to central platform by collector immediately.And a secondary data is sent to central platform in after this at interval of 4 points.
Central platform sends early warning to client, intelligent terminal.
Cable local discharge is monitored:
Acquisition controller carries out collection analysis by high frequency sensors to the pulse characteristics of shelf depreciation and discharge capacity.
The pulse characteristics collected is converted into amplitude, frequency, width, and encode, each sampling 2000 stack features values, the partial discharge quantity of collection is 2100PC, that wherein analyzes 2000 stack features values show that shelf depreciation type is internal discharge, and discharge capacity 2100PC is abnormal.
It is 8 hours that acquisition controller shortens sampling interval duration, and abnormal data and local electric discharge type analysis result are sent to central platform.
Central platform sends early warning to client, intelligent terminal.
Acquisition controller anti-theft monitoring: displacement signal appears in the built-in vibration displacement sensor of acquisition controller, equipment may be stolen, immediately displacement data is uploaded to central platform, and is transferred to client, intelligent terminal.
Grounding box anti-theft monitoring: displacement signal appears in the built-in vibration displacement sensor of grounding box, grounding box may be stolen, immediately displacement data is uploaded to central platform, and is transferred to client, intelligent terminal.
Ground wire anti-theft monitoring: displacement signal appears in the vibration displacement sensor on ground wire, and ground current=0, ground wire may be stolen or come off, immediately by data upload to central platform, and be transferred to client, intelligent terminal.
In specific implementation process, according to case history situation, in order to the urgency level of compartment system Monitoring Data, the various states such as early warning, alarm and emergency alarm can be performed respectively to the data monitored.
Such as, to cable temperature monitoring: when T3 reaches 60 DEG C of values, namely perform alarm; When reaching 90 DEG C of values, namely perform emergency alarm.
Earth wire current monitoring: the ground current that acquisition controller collects single-phase reaches 60A value, namely performs existing alarm; If above-mentioned ground current reaches 70A value, namely perform emergency alarm.
Cable local discharge is monitored: partial discharge quantity, for reaching 2000PC value, namely performs alarm; If partial discharge quantity reaches 2200PC value, namely perform emergency alarm.
In order to the accuracy of monitoring cable operating temperature improves further, prevent monitoring from starting a leak, in specific implementation process, can according to case history situation, by environment temperature T1, cable skin temperature T2, core temperature T3, the 3rd difference DELTA T can also be calculated
31, the temperature difference namely between core temperature and environment temperature, and as judging the foundation whether cable temperature abnormal, the 3rd difference DELTA T
31for the difference between environment temperature T1, core temperature T3.
Above-mentioned is exemplary illustration, does not represent the protection domain of patent of the present invention.
Claims (10)
1. single-core high-voltage cable joint intelligent monitor system, is made up of signal collection part and central platform, and signal collection part is connected with central platform, and signal collection part collects cable splice running parameter, and is filed in central platform process;
Also be provided with client, intelligent terminal is connected with central platform, client and intelligent terminal are used for long-range checking;
Described signal collection part is connected and composed by transmission control unit (TCU) and acquisition controller, acquisition controller collects cable splice operating parameter information, transmission control unit (TCU) arranges transport module, and the cable splice operating parameter information collected by acquisition controller is transferred to central platform; Acquisition controller is connected with temperature monitoring module, current monitoring module, theft-proof sensor, cable local discharge sensor.
2. single-core high-voltage cable joint intelligent monitor system as claimed in claim 1, it is characterized in that, described temperature monitoring module is connected with at least three temperature sensors, is separately positioned on installation environment place, cable core around cable splice top layer, cable; Described current monitoring model calling has current sensor, and current sensor is arranged on the ground wire of cable splice; Described theft-proof sensor is connected with vibration displacement sensor, vibration displacement sensor is separately positioned on ground wire, in grounding box, in acquisition controller; Cable local discharge sensor setting is on ground wire, and described cable local discharge sensor is high frequency sensors.
3. single-core high-voltage cable joint intelligent monitor system as claimed in claim 1, it is characterized in that, described acquisition controller arranges data acquisition bus interface, and temperature monitoring module, current monitoring module, cable local discharge sensor, vibration displacement sensor are connected to data acquisition bus interface; CPU processor is also provided with, collector communication module, diagnostic module, supply module in acquisition controller; Described transmission control unit (TCU) is made up of transmitter communication module, supply module, controller, and on transmission control unit (TCU), be provided with transfer bus interface and radio transmitting device; Collector communication module is connected with transmitter communication module, and transmission control unit (TCU) is connected with central platform by wireless.
4. the single-core high-voltage cable joint intelligent monitor system as described in claim 1 or 3, is characterized in that, described transmission control unit (TCU) is connected with central platform by transfer bus interface.
5. single-core high-voltage cable joint intelligent monitoring method, comprises cable temperature monitoring method, ground wire current monitoring method, cable local discharge monitoring method, theft protection for devices method;
Described cable temperature monitoring method is:
A, in acquisition controller preset temperature correlative value;
B, acquisition controller collect environment temperature T1, cable skin temperature T2, core temperature T3;
C, computing environment temperature T1, cable skin temperature T2, core temperature T3 difference each other;
D, difference cable skin temperature T2, core temperature T3, step c obtained and preset temperature correlative value are compared, and show whether cable skin temperature and cable core temperature are normal value;
Above-mentioned detection data and comparison result are regularly uploaded to central platform by e, acquisition controller;
Described ground wire current monitoring method is:
A, in acquisition controller preset ground current correlative value;
B, acquisition controller collect ground current I1; And ground current I1 and default ground current correlative value are contrasted, show whether ground current I1 is normal value;
Ground current I1 monitoring result regularly can be uploaded to central platform by c, acquisition controller;
Described cable local discharge monitoring method is:
A, in acquisition controller, preset shelf depreciation type determining program and partial discharge quantity correlative value;
B, acquisition controller collect current impulse characteristic sum partial discharge quantity, and the charge value collected and default correlative value are contrasted, and judge whether its discharge capacity is normal value;
Acquisition controller carries out analysis contrast by the shelf depreciation type determining program preset to the pulse characteristics gathered simultaneously, draws shelf depreciation type;
The monitoring result of pulse characteristics and partial discharge quantity regularly can be uploaded to central platform by c, acquisition controller;
Described theft protection for devices method is acquisition controller theft preventing method, grounding box theft preventing method, ground wire theft preventing method are: by vibration displacement Sensor monitoring displacement signal, whether determining apparatus, grounding box be stolen; In ground wire anti-theft monitoring process, the vibration displacement sensor on ground wire and ground current is adopted jointly to judge that whether ground wire is stolen; There is stolen information, stolen information is uploaded to central platform, and by central platform to client, intelligent terminal alarm.
6. single-core high-voltage cable joint intelligent monitoring method as claimed in claim 6; It is characterized in that,
Described cable temperature monitoring method is specially:
Computing environment temperature T1, cable skin temperature T2, core temperature T3 difference each other, the first difference wherein between environment temperature T1 and cable skin temperature T2 is Δ T21, and the second difference between cable skin temperature T2 and core temperature T3 is Δ T32;
Environment temperature T1, cable skin temperature T2, core temperature T3, the first difference DELTA T21, the second difference DELTA T32 and preset temperature correlative value are contrasted, show whether cable skin temperature, cable core temperature are normal value;
Environment temperature T1, cable skin temperature T2, core temperature T3, the first difference DELTA T21, the second difference DELTA T32 are regularly uploaded to central platform by acquisition controller.
7. single-core high-voltage cable joint intelligent monitoring method as claimed in claim 6: it is characterized in that, in described acquisition controller, preset temperature correlative value is: environment temperature T1, cable skin temperature T2, core temperature T3 are all less than 60 DEG C, first difference DELTA T21 is less than 5 DEG C, and the second difference DELTA T32 is less than 10 DEG C;
Temperature anomaly judges setting: the first difference DELTA T21 changed and is greater than 5 DEG C and is considered as exception in 1 hour, and the second difference DELTA T32 changed and is greater than 10 DEG C and is considered as exception in 1 hour; Cable skin temperature T2 and core temperature T3 changed rising 5 DEG C and is considered as exception in 1 hour; Core temperature T3 is greater than 60 DEG C and is considered as exception;
Acquisition controller can judge carrying out contrast at interval of 0 ~ 10 minute to the temperature collected and preset temperature, abnormal then upload to central platform; Normal then uploaded once every 0 ~ 99 hour;
When acquisition controller is continuous monitor for more than 2 times exist abnormal in environment temperature T1, cable skin temperature T2, core temperature T3, the first difference DELTA T21, the second difference DELTA T32 time, acquisition controller can foreshorten to uploaded a secondary data to central platform at interval of 1 ~ 600 second, and by central platform to client, intelligent terminal early warning.
8. single-core high-voltage cable joint intelligent monitoring method as claimed in claim 6, it is characterized in that, described ground wire current monitoring method is:
In acquisition controller, preset ground current correlative value is 0 ~ 200A;
Ground current I1 monitoring result can uploaded to central platform at interval of 1 ~ 8 hour by acquisition controller;
When acquisition controller is continuous monitor for more than 1 time there is exceptional value in ground current I1 monitoring result time, shorten to 1 ~ 600 second and upload once, and by central platform to client, intelligent terminal early warning.
9. single-core high-voltage cable joint intelligent monitoring method as claimed in claim 6, it is characterized in that, described cable local discharge monitoring method is:
A, in acquisition controller, be provided with shelf depreciation type determining program, and to preset discharge capacity correlative value be 1 ~ 2000PC;
Partial discharge quantity is greater than 2000PC for abnormal;
B, acquisition controller can be analyzed the partial discharge pulse's feature collected every 0 ~ 24 hour, and discharge capacity and the correlative value preset were contrasted, and were uploaded to central platform when abnormal; Upload once in every 0 ~ 99 hour under normal circumstances;
When acquisition controller monitors discharge capacity exception, shorten to 0 ~ 12 hour and upload once;
The pulse characteristics collected is converted into discharge frequency, pulse width and electric discharge amplitude by c, acquisition controller, and encodes, and each number of samples is greater than 1 ~ 2000 stack features value, and sampling interval duration is preset;
D, collector regularly will be greater than 1 ~ 2000 group pulse feature and upload to central platform, undertaken judging and processing by central platform, and to sampling eigenwert, namely the distribution of impulse discharge waveform, discharge phase and the size of electric discharge amplitude carry out cluster analysis, draw shelf depreciation type according to cluster analysis result.
10. the theft protection for devices method described in is acquisition controller theft preventing method, grounding box theft preventing method, ground wire theft preventing method;
Acquisition controller theft preventing method is specially: when the built-in vibration displacement Sensor monitoring of acquisition controller is after displacement signal, displacement signal is uploaded to central platform, and by central platform to client, intelligent terminal alarm;
Grounding box theft preventing method is specially: when the built-in vibration displacement Sensor monitoring of grounding box is after displacement signal, displacement signal is uploaded to central platform, and by central platform to client, intelligent terminal alarm;
Ground wire theft preventing method is specially: the vibration displacement sensor on monitoring grounding wire and ground current, when the vibration displacement sensor on ground wire detects displacement information also after ground current equals 0, determine that ground wire is stolen, and monitoring result is uploaded to central platform, and by central platform to client, intelligent terminal alarm.
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