CN107702804A - A kind of cable intermediate joint temperature rise on-line monitoring system and method based on temperature difference method - Google Patents
A kind of cable intermediate joint temperature rise on-line monitoring system and method based on temperature difference method Download PDFInfo
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- CN107702804A CN107702804A CN201710835562.1A CN201710835562A CN107702804A CN 107702804 A CN107702804 A CN 107702804A CN 201710835562 A CN201710835562 A CN 201710835562A CN 107702804 A CN107702804 A CN 107702804A
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- temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
Abstract
The present invention relates to a kind of cable intermediate joint temperature rise on-line monitoring system and its method.Mainly solve in the prior art using the method for Traditional Man inspection cable connector has human and material resources, financial resources waste and monitoring reliability is low, poor real, the problem of being difficult to timely discovering device potential safety hazard, device includes temperature sensing module, microprocessor, power circuit, newly carry out screening by the temperature to detection simultaneously and ambient temperature value carries out mathematic interpolation, judge whether temperature rise is abnormal.The present invention can accurately obtain temperature of cable junction, and it is monitored in real time, it is ensured that cable health and safety are run.
Description
Technical field
The present invention relates to field of electrical equipment, more particularly to a kind of cable intermediate joint temperature rise on-line monitoring system and its
Method.
Background technology
Power equipment causes because production quality, installation quality, run time, usage frequency and working environment etc. influence
Installation place contact is unreliable, and temperature rise exceeds the allowed band of national regulation so that cable terminal insulation aging, or even puncture
The serious consequences such as damage.The temperature of intermediate joint of electric cable is to reflect the important parameter of its running status.Cause cable connector
Temperature rise immediate cause is joint long operational time, crimp head be not tight, contact resistance is excessive etc..Caused by joint longtime running
Phenomena such as overheat, burn-through insulation, easily triggers fire, so as to cause serious accident and economic loss.
Cable connector is superheated to accident, and its development speed is slow, the time is longer, using the method for Traditional Man inspection
Reliability is low, poor real, it is difficult to timely discovering device potential safety hazard.Therefore, how temperature of cable junction is effectively carried out
Automatic be monitored and controlled has important practical significance.
In power system, because the factors such as cable connector contact resistance is excessive, overload cause connector temperature too high, make
Obtain joint insulation variation or burning collapses burst accident and causes fire, serious potential safety hazard is brought to industrial production, is even resulted in
The major accident that equipment forced outage, short time can not resume production, the reliability of electric power netting safe running is reduced, causes great warp
Ji loss.
Cable connector is the most weak link of power cable, and the more long easier generation of run time overheats burn-through accident.Connect
Head temperature is to weigh the important indicator that whether state of insulation is good in cable connector operation, and its temperature change is in normal operation
Under be due to that electric current passes through caused by inner conductor.When cable is run in normal duty, the temperature inside joint is about 90
℃；When cable oepration at full load, connector temperature can be up to 250 DEG C or so；When temperature raises again, the oxide-film of joint adds
Thickness, contact resistance increase therewith, and in the presence of certain conduction time, it is nonisulated thing that the dielectric of joint, which decomposes carbonization,
Cause failure.Therefore, the temperature of cable connector core is accurately understood, whether normal operation has weight to monitoring cable connector
Want meaning.A kind of cable intermediate joint temperature rise on-line monitoring system and its method based on temperature difference method are proposed for this present invention,
The device solves measurement apparatus criterion by environment by monitoring the difference of cable intermediate joint temperature and environment temperature in real time
Temperature influences problem.
The content of the invention
Present invention mainly solves in the prior art use Traditional Man inspection cable connector method exist human and material resources,
Financial resources waste and monitoring reliability is low, poor real, it is difficult to timely discovering device potential safety hazard, there is provided one kind is based on temperature difference
The cable intermediate joint temperature rise on-Line Monitor Device and its method of method, can accurately obtain temperature of cable junction, and reality is carried out to it
When monitor, it is ensured that cable health and safety run.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：Electricity based on temperature difference method
Cable transition joint temperature rise on-line monitoring system, including：Temperature sensing module, microprocessor, power circuit, temperature sensing module are defeated
Go out end to be connected with the I/O mouths of microcontroller circuit, power circuit is connected with microcontroller circuit.
Temperature sensing module, including the temperature sensor of multiple measurement temperature of cable junction and an environment temperature sensing
Device, multiple temperature sensors are uniformly arranged on cable shaft cable intermediate joint, each temperature sensor is consolidated using insulation material
It is scheduled at cable intermediate joint electric field stress concentration and intermediate connections；Environment temperature sensor, cable well environment is monitored in real time
Temperature.
Microprocessor, difference processing is carried out to the temperature of cable junction value surveyed in temperature sensing module, obtains temperature biography
The difference of sensor and environment temperature sensor temperature value, then the difference of temperature sensor and environment temperature sensor temperature value is entered
Row Screening Treatment, the temperature value after Screening Treatment is finally subjected to average value processing, cable connector temperature rise value is obtained, cable connector
Temperature rise value judges whether to alarm compared with temperature alarm threshold value；When cable connector temperature rise value is more than temperature alarm threshold value,
Microprocessor sends alarm signal.
The present invention measures temperature of cable junction and cable shaft environment temperature by temperature sensing module, to temperature sensing module
Middle surveyed temperature of cable junction value carries out difference processing, obtains the difference of temperature sensor and environment temperature sensor temperature value
Value, then the difference of temperature sensor and environment temperature sensor temperature value is subjected to Screening Treatment, finally by after Screening Treatment
Temperature value carries out average value processing, obtains cable connector temperature rise value, cable connector temperature rise value compared with temperature alarm threshold value, judges
Whether alarmed；When cable connector temperature rise value is more than temperature alarm threshold value, microprocessor sends alarm signal to client
Staff is notified, addressing circuit determines failure cable joint location, and it is rushed to repair in time, to realize to cable shaft
Function is monitored in cable connector temperature rise on-line.
As a kind of preferred scheme, temperature sensor is made up of thermistor and oscillating circuit.Temperature sensor is by temperature
Signal is converted into frequency signal output, temperature value is corresponded with frequency values, is exported using frequency signal, and it is diamagnetic to improve device
Field and electric jamming ability.
As a kind of preferred scheme, the device also connects including Smoke Sensor, level sensor, attitude transducer, communication
Mouth, display circuit, key circuit, addressing circuit, power circuit.
Attitude transducer uses three-axis gyroscope, can be with tri- direction situation of movement of detection cable well X, Y, Z.
Smoke Sensor uses ion smoke alarm, and the sensing to small smoke particle is very sensitive, to various cigarettes
Can equalizer response.
Level sensor uses float type water level sensor, and equipment is most ripe, suitable for the water level monitoring of cable shaft.
Display circuit, show the related data in microprocessor.
Key circuit, temperature alarm threshold value and temperature difference threshold are set in the microprocessor
Communication interface, when temperature rise value is more than set alert thresholds, microprocessor sends warning by communication interface to client
Signal notifies staff.
Addressing circuit, failure cable joint location can be quick and precisely positioned, be easy in time to failure cable joint
Rushed to repair, realized to cable shaft cable connector temperature rise on-line monitoring function.
Power circuit, power circuit is powered using CT or solar powered or battery powered or 20VAC power supplies, or they
Combine and the cable intermediate joint temperature rise on-Line Monitor Device of temperature difference method is powered, it is ensured that the stability of power supply power supply.
A kind of cable intermediate joint temperature rise on-line monitoring method based on temperature difference method, comprises the following steps：
S1. microcomputer reads No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors and environment temperature
The temperature value that degree sensor measures；
S2. No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors and environment temperature is calculated respectively to pass
The difference of sensor measured temperature value, numbering is difference 1, difference 2, difference 3 respectively；
S3. Screening Treatment, the temperature gap after being screened are carried out to difference 1, difference 2, difference 3；
S4. the average of the temperature gap by screening, as cable connector temperature rise value are calculated；
S5. when cable connector temperature rise value is more than set alert thresholds, microprocessor sends warning by communication interface to computer
Signal notifies staff.
S6. addressing circuit determines failure cable joint location occur, realizes online to cable shaft cable connector temperature rise
Monitoring function.
The present invention obtains temperature biography by carrying out difference processing to the temperature of cable junction value surveyed in temperature sensing module
The difference of sensor and environment temperature sensor temperature value, then the difference of temperature sensor and environment temperature sensor temperature value is entered
Row Screening Treatment, the temperature value after Screening Treatment is finally subjected to average value processing, cable connector temperature rise value is obtained, cable connector
Temperature rise value judges whether to alarm compared with temperature alarm threshold value；When cable connector temperature rise value is more than temperature alarm threshold value,
Microprocessor sends alarm signal to client notification staff, and addressing circuit determines failure cable joint location, right
It is rushed to repair in time, and function is monitored on-line to the temperature rise of cable shaft cable connector to realize.
Carrying out Screening Treatment to temperature as a kind of preferred scheme, in S3 includes following processing procedure：
S31. first distinguish calculating difference 1 and difference 2, the difference of difference 3, when 2 differences both greater than set temperature difference threshold, give up
Difference 1, on the contrary enter next step average value processing；
S32. calculating difference 2 and difference 1, the difference of difference 3 are first distinguished, when 2 differences both greater than set temperature difference threshold, house
Difference 2 is abandoned, otherwise enters next step average value processing；
S33. calculating difference 3 and difference 1, the difference of difference 2 are first distinguished, when 2 differences both greater than set temperature difference threshold, house
Difference 3 is abandoned, otherwise enters next step average value processing.
Therefore, it is an advantage of the invention that：Provide a kind of cable intermediate joint temperature rise on-line monitoring based on temperature difference method
System and method, by carrying out difference processing to the temperature of cable junction value surveyed in temperature sensing module, obtain temperature biography
The difference of sensor and environment temperature sensor temperature value, then the difference of temperature sensor and environment temperature sensor temperature value is entered
Row Screening Treatment, the temperature value after Screening Treatment is finally subjected to average value processing, cable connector temperature rise value is obtained, cable connector
Temperature rise value judges whether to alarm compared with temperature alarm threshold value；When cable connector temperature rise value is more than temperature alarm threshold value,
Microprocessor sends alarm signal to client notification staff, and addressing circuit determines failure cable joint location, right
It is rushed to repair in time, and function is monitored on-line to the temperature rise of cable shaft cable connector to realize.Compared to the section by the way of artificial
Substantial amounts of human and material resources and financial resources have been saved, while have been added compared in general temperature measurement system for cable joint to cable well environment temperature
The detection of degree simultaneously measures temperature value progress difference, screening, average value processing to system, improves cable connector temperature rise on-line monitoring
Accuracy and stability, realize to cable shaft cable connector temperature rise on-line monitoring function.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the temperature of cable junction sensor installation of present system device；
Accompanying drawing 2 is the concentration measurement module structure chart of present system device；
Accompanying drawing 3 is the structure flow chart of present system method.
1-No.1 point temperature sensor, 2-No. two point temperature sensors, 3-No. three point temperature sensors 4-electricity
Cable transition joint 5-temperature sensing module, 6-environment temperature sensor, 7-key circuit, 8-power circuit
Communication interface 13-client, the 14-posture of 9-microprocessor, 10-Smoke Sensor, 11-level sensor 12
16-the addressing circuit of display circuit of sensor 15.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Embodiment：
The present embodiment is a kind of temperature rise on-line monitoring system of cable intermediate joint 4 based on temperature difference method, as shown in Fig. 2 this hair
The concentration measurement module structure chart of bright system and device includes temperature sensing module, key circuit 7, microcontroller circuit 9, power supply electricity
Road 8, Smoke Sensor 10, level sensor 11, attitude transducer 14, communication interface 12, display circuit 15, addressing circuit
16th, client 13；Wherein temperature sensing module includes the point temperature of point temperature sensor 2, three of No.1 point temperature sensor 1, two
Spend sensor 3, environment temperature sensor 6, No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors,
The output end of environment temperature sensor is connected with the I/O mouths of microcontroller circuit respectively；The output end and microprocessor of key circuit
The I/O mouths connection of device circuit；The output end of power circuit and the power end of microcontroller circuit connect；The output of Smoke Sensor
End is connected with the I/O mouths of microcontroller circuit；The output end of level sensor and the A/D ports of microcontroller circuit connect；Appearance
The output end of state sensor and the digital mouth of microcontroller circuit connect；The input of display circuit and the I/ of microcontroller circuit
O mouths connect；The output end of addressing circuit and the I/O mouths of microcontroller circuit connect；The input and Wei Chu of communication interface
Manage the port connection of device circuit.
As shown in figure 1, the point temperature sensor 3 of point temperature sensor 2, three of No.1 point temperature sensor 1, two is uniformly pacified
On cable shaft cable intermediate joint, each temperature sensor is fixed on cable intermediate joint electric field stress collection using insulation material
Middle place and intermediate connections.
Temperature sensor is made up of thermistor and oscillating circuit, the temperature of cable junction signal that temperature sensor will measure
Be converted into frequency signal output, correspond temperature value and frequency values, exported using frequency signal, improve the diamagnetic field of device and
Electric jamming ability.
Power circuit, power circuit is powered using CT or solar powered or battery powered or 20VAC power supplies, or they
Combine and the cable intermediate joint temperature rise on-Line Monitor Device of temperature difference method is powered, it is ensured that the stability of power supply power supply.
Attitude transducer uses three-axis gyroscope, can be prevented artificial with tri- direction situation of movement of detection cable well X, Y, Z
Removal cable manhole cover plate..
Smoke Sensor uses ion smoke alarm, and the sensing to small smoke particle is very sensitive, to various cigarettes
Energy equalizer response, when failure triggers fire at cable connector, ion smoke alarm can in time detect and send signal
To microprocessor, fire information is sent to client by microprocessor by communication interface with wireless signal, can timely pair of event
Barrier is handled, and is improved security and is reduced loss.
Level sensor uses float type water level sensor, and equipment is most ripe, suitable for the water level monitoring of cable shaft, according to
Actual conditions set watermark threshold, and level sensor transfers information to microprocessor after water level reaches threshold value, and microprocessor leads to
Cross communication interface and will send information to client, drainage sunk well can be carried out to cable shaft in advance..
Display circuit, show the related data in microprocessor.
Key circuit, temperature alarm threshold value and temperature difference threshold are set in the microprocessor
Communication interface, when temperature rise value is more than set alert thresholds, microprocessor sends warning by communication interface to client
Signal notifies staff.
Addressing circuit, failure cable joint location can be quick and precisely positioned, be easy in time to failure cable joint
Rushed to repair, realized to cable shaft cable connector temperature rise on-line monitoring function.
A kind of cable intermediate joint temperature rise on-line monitoring method based on temperature difference method：
Idiographic flow is as shown in Figure 3：
A kind of cable intermediate joint temperature rise on-line monitoring method based on temperature difference method, comprises the following steps：
S1. microcomputer reads No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors and environment temperature
The temperature value that degree sensor measures；
S2. No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors and environment temperature is calculated respectively to pass
The difference of sensor measured temperature value, numbering is difference 1, difference 2, difference 3 respectively；
S3. Screening Treatment, the temperature gap after being screened are carried out to difference 1, difference 2, difference 3；
S4. the average of the temperature gap by screening, as cable connector temperature rise value are calculated；
S5. when cable connector temperature rise value is more than set alert thresholds, microprocessor sends warning by communication interface to computer
Signal notifies staff.
S6. addressing circuit determines failure cable joint location occur, realizes online to cable shaft cable connector temperature rise
Monitoring function.
Wherein, carrying out Screening Treatment to temperature in S3 includes following processing procedure：
S31. first distinguish calculating difference 1 and difference 2, the difference of difference 3, when 2 differences both greater than set temperature difference threshold, give up
Difference 1, on the contrary enter next step average value processing；
S32. calculating difference 2 and difference 1, the difference of difference 3 are first distinguished, when 2 differences both greater than set temperature difference threshold, house
Difference 2 is abandoned, otherwise enters next step average value processing；
S33. calculating difference 3 and difference 1, the difference of difference 2 are first distinguished, when 2 differences both greater than set temperature difference threshold, house
Difference 3 is abandoned, otherwise enters next step average value processing
The present invention to surveyed temperature of cable junction by being screened, average value processing, and ensure that will not connect because of some survey cable
Head temperature sensor fault and cause the entirely cable intermediate joint temperature rise on-Line Monitor Device failure based on temperature difference method, really
The stability of device has been protected, while has added an environment temperature sensor, has calculated temperature value average and environment temperature sensor
The difference of measured temperature value, cable intermediate joint temperature rise value is obtained, exclude environment temperature and cable intermediate joint temperature rise is supervised online
The influence of survey.When temperature rise value is more than set alert thresholds, microprocessor sends alarm signal to computer by communication interface and led to
Know staff, addressing circuit determines failure cable joint location occur, rushed to repair, realized to cable shaft cable in time
Function is monitored in joint temperature rise on-line.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although more having used the terms such as temperature sensing module, communication interface, microprocessor, key circuit herein,
It is not precluded from the possibility using other terms.It is used for the purpose of more easily describing and explaining the present invention's using these terms
Essence；Any additional limitation is construed as all to disagree with spirit of the present invention.
Claims (10)
1. a kind of cable intermediate joint temperature rise on-line monitoring system based on temperature difference method, it is characterized in that, including：TEMP mould
The I/O mouths connection of block, microprocessor, temperature sensing module output end and microcontroller circuit；
Temperature sensing module, include the temperature sensor and an environment temperature sensor of multiple measurement temperature of cable junction,
Multiple temperature sensors are uniformly installed on cable shaft cable intermediate joint, monitor cable intermediate joint temperature in real time；Environment temperature
Sensor is spent, monitors cable shaft environment temperature in real time;
Microprocessor, difference processing is carried out to the temperature of cable junction value surveyed in temperature sensing module, obtains temperature sensor
With the difference of environment temperature sensor temperature value, then the difference of temperature sensor and environment temperature sensor temperature value sieved
Choosing is handled, and the temperature value after Screening Treatment finally is carried out into average value processing, cable connector temperature rise value is obtained, cable connector temperature rise
Value judges whether to alarm compared with temperature alarm threshold value；When cable connector temperature rise value is more than temperature alarm threshold value, micro- place
Reason device sends alarm signal.
2. the cable intermediate joint temperature rise on-line monitoring system according to claim 1 based on temperature difference method, it is characterized in that,
Temperature sensor is made up of thermistor and oscillating circuit.
3. the cable intermediate joint temperature rise on-line monitoring system according to claim 1 based on temperature difference method, it is characterized in that,
Also include level sensor, the A/D ports connection of output end and microcontroller circuit.
4. the cable intermediate joint temperature rise on-line monitoring system according to claim 1 based on temperature difference method, it is characterized in that,
Also include power circuit, power circuit is connected with microcontroller circuit.
5. the cable intermediate joint temperature rise on-line monitoring system according to claim 1 based on temperature difference method, it is characterized in that,
Also include key circuit, addressing circuit, Smoke Sensor, the output of key circuit, addressing circuit, Smoke Sensor
End is connected with the I/O mouths of microcontroller circuit respectively.
6. the cable intermediate joint temperature rise on-line monitoring system according to claim 1 based on temperature difference method, it is characterized in that,
Also include attitude transducer, the digital mouth connection of attitude transducer output end and microcontroller circuit.
7. the cable intermediate joint temperature rise on-line monitoring system according to claim 1 based on temperature difference method, it is characterized in that,
Also include display circuit, display circuit input connects the I/O mouths of microcontroller circuit.
8. the cable intermediate joint temperature rise on-line monitoring system according to claim 1 based on temperature difference method, it is characterized in that,
Also include communication interface, the port connection of communication interface input end and microcontroller circuit.
A kind of 9. cable intermediate joint temperature rise on-line monitoring method based on temperature difference method, using in any one of right 1-8
System, it is characterized in that comprising the following steps：
S1. microcomputer reads No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors and environment temperature
The temperature value that degree sensor measures；
S2. No.1 point temperature sensor, No. two point temperature sensors, No. three point temperature sensors and environment temperature is calculated respectively to pass
The difference of sensor measured temperature value, numbering is difference 1, difference 2, difference 3 respectively；
S3. Screening Treatment, the temperature gap after being screened are carried out to difference 1, difference 2, difference 3；
S4. the average of the temperature gap by screening, as cable connector temperature rise value are calculated；
S5. when cable connector temperature rise value is more than set alert thresholds, microprocessor sends warning by communication interface to computer
Signal notifies staff；
S6. addressing circuit determines failure cable joint location occur.
10. a kind of cable intermediate joint temperature rise on-line monitoring method based on temperature difference method according to claim 9, it is special
Sign is that the difference progress Screening Treatment in S3 to measured temperature value includes following processing procedure：
S21. first distinguish calculating difference 1 and difference 2, the difference of difference 3, when 2 differences both greater than set temperature difference threshold, give up
Difference 1, on the contrary enter next step average value processing；
S22. calculating difference 2 and difference 1, the difference of difference 3 are first distinguished, when 2 differences both greater than set temperature difference threshold, house
Difference 2 is abandoned, otherwise enters next step average value processing；
S23. calculating difference 3 and difference 1, the difference of difference 2 are first distinguished, when 2 differences both greater than set temperature difference threshold, house
Difference 3 is abandoned, otherwise enters next step average value processing.
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| CN109596886A (en) * | 2018-12-05 | 2019-04-09 | 合肥能安科技有限公司 | A kind of contact resistance on-Line Monitor Device and method |
| CN110631723A (en) * | 2019-10-17 | 2019-12-31 | 国网河南省电力公司济源供电公司 | Cable joint and temperature rise remote monitoring equipment system of temperature gradient method |
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Application publication date: 20180216 |