CN110082604A - A kind of current carrying lead Thermal Parameter measuring device and measuring method - Google Patents
A kind of current carrying lead Thermal Parameter measuring device and measuring method Download PDFInfo
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- CN110082604A CN110082604A CN201910423042.9A CN201910423042A CN110082604A CN 110082604 A CN110082604 A CN 110082604A CN 201910423042 A CN201910423042 A CN 201910423042A CN 110082604 A CN110082604 A CN 110082604A
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- lead
- thermocouple
- insulating layer
- electric conductor
- 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
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
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- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention relates to a kind of current carrying lead Thermal Parameter measuring device and measuring method, belong to power transformer Thermal Properties technical field.Technical solution: lead electric conductor surface, thickness of insulating layer direction different location and transformer oil in bury 10-20 thermocouple, the lead-out wire of thermocouple is along the extraction of wire length direction；Down-lead bracket is fixed on inside oil groove, and the lead of thermocouple is fixed on down-lead bracket；Lead both ends are connected to power supply by power supply line, and the lead-out wire of thermocouple is connect with measuring instrument, and transformer oil injects oil groove；After powering on, with thermocouple measurement electric conductor surface, the temperature of insulating layer different location and transformer oil.The present invention passes through the temperature with thermocouple measurement lead electric conductor surface, insulating layer different location and transformer oil, the Thermal Parameters such as thermal coefficient of lead temperature rise, insulating materials are calculated according to measurement result, for control lead temperature rise of hot spot, prevent that hot-spot provides strong technical support.
Description
Technical field
The present invention relates to a kind of current carrying lead Thermal Parameter measuring device and measuring method, and it is hot to belong to power transformer
It can studying technological domain.
Background technique
For Systems of High Voltage Large Power Transformers, wire current is up to several kiloamperes even amperes up to ten thousand, if lead is in height
Field region can also generate biggish eddy-current loss, and high-voltage connection is needed the insulating layer of 5~20mm of outsourcing by voltage class.
If pin configuration is unreasonable or is in highfield region, it is possible to generate hot-spot on lead, and hot-spot meeting
Lead to transformer fault.Therefore, it controls lead temperature rise of hot spot, prevent that hot-spot just becomes Systems of High Voltage Large Power Transformers
One of key technology.Lead temperature rise of hot spot can be calculated and be controlled using the hot emulation technology of lead, and carries out lead heat emulation
Input lead Thermal Parameter is needed, needs a kind of device to obtain current carrying lead Thermal Parameter.
Summary of the invention
It is an object of the present invention to provide a kind of current carrying lead Thermal Parameter measuring device and measuring method, by with thermocouple
The temperature for measuring leading-in conductor surface, insulating layer different location and transformer oil, is calculated lead according to temperature measurement result
The Thermal Parameters such as temperature rise, the thermal coefficient of insulating materials, wire surface coefficient of heat transfer, efficiently solve in background technique and deposit
The above problem.
The technical scheme is that a kind of current carrying lead Thermal Parameter measuring device, comprising oil groove, down-lead bracket,
Lead, power supply line, thermocouple and transformer oil, the transformer oil injection are arranged in oil groove；Lead is comprising electric conductor and absolutely
The outside of electric conductor is arranged in edge layer, package；The quantity of thermocouple is more than one, is embedded in lead electric conductor surface, insulation
In the different location and transformer oil of layer thickness direction, the lead-out wire of thermocouple is drawn along wire length direction；Down-lead bracket peace
Dress is fixed on inside oil groove, and the lead-out wire of thermocouple is fixed on down-lead bracket；Lead both ends are connect by bolt with power supply line,
Power supply line connects to power supply, and the lead-out wire of thermocouple is connect with measuring instrument.
The quantity of the thermocouple is 10-20, buries 7-9 thermocouple, neighboring thermocouple on lead electric conductor surface
Conductive surface temperature-sensitive point spacing is 150mm(millimeters)；1 thermocouple, insulating layer are buried every 2-3mm along thickness of insulating layer direction
Temperature-sensitive point leans on medium position in wire length direction；3-5 are buried away from the lead wire insulation position layer surface 10mm in transformer oil
Thermocouple.
The electric conductor of the lead is the fine copper stick of long 1200-1500mm, Φ 20- Φ 50, and both ends are equipped in shape is flattened
Wiring hole；Thickness of insulating layer is 10-20mm.
A kind of current carrying lead Thermal Parameter measurement method comprising the steps of: 1. lead electric conductor is long 1200-
The fine copper stick of 1500mm, Φ 20- Φ 50, both ends flattening, milling flat beat wiring hole, outsourcing insulating paper 5-20mm；2. in lead packet
During insulating layer, 7-9 thermocouple is buried on lead electric conductor surface, neighboring thermocouple conductive surface temperature-sensitive point spacing is about
150mm buries 1 thermocouple every 2-3mm along thickness of insulating layer direction, and insulating layer temperature-sensitive point leans on middle part in wire length direction
3-5 thermocouple is buried away from the lead wire insulation position layer surface 10mm in transformer oil in position, and the lead-out wire of thermocouple is along lead
Length direction is drawn；3. down-lead bracket is fixed on inside oil groove, then the lead for having buried thermocouple is fixed on and is drawn
On line bracket；4. lead both ends are connect by bolt with power supply line, power supply line connects to power supply again, the lead-out wire of thermocouple and survey
Measuring appratus connection, injects oil groove for transformer oil later；5. after powering on, lead flows through current heating, steady to wire temperature
After fixed, with thermocouple measurement electric conductor surface, the temperature of insulating layer different location and transformer oil；6. according to measured temperature meter
Calculate the Thermal Parameters such as lead temperature rise, the thermal coefficient of insulating materials, wire surface coefficient of heat transfer；7. the size for changing electric current can
The relation data of lead loss density and temperature rise is measured, the thickness for changing lead wire insulation layer can measure lead outsourcing insulation thickness
The relation data of degree and temperature rise.
The beneficial effects of the present invention are: by with thermocouple measurement lead electric conductor surface, insulating layer different location and change
Lead temperature rise, the thermal coefficient of insulating materials, wire surface heat dissipation is calculated according to temperature measurement result in the temperature of depressor oil
The Thermal Parameters such as coefficient, to for control lead temperature rise of hot spot, prevent that hot-spot provides strong technical support.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of current carrying lead Thermal Parameter measuring device of the present invention；
Fig. 2 is the burial place schematic diagram of thermocouple of the present invention；
In figure: oil groove 1, down-lead bracket 2, lead 3, power supply line 4, thermocouple 5, transformer oil 6, insulating layer 7, thermocouple conductor table
Face temperature-sensitive point 8, insulating layer temperature-sensitive point 9, power supply 10, measuring instrument 11, transformer oil temperature measuring point 12.
Specific embodiment
Technical solution of the present invention is described in further detail with embodiment with reference to the accompanying drawing.
A kind of current carrying lead Thermal Parameter measuring device includes oil groove 1, down-lead bracket 2, lead 3, power supply line 4, thermoelectricity
Idol 5 and transformer oil 6, the injection of transformer oil 6 are arranged in oil groove 1；Lead 3 includes electric conductor and insulating layer 7, and package is set
It sets in the outside of electric conductor；The quantity of thermocouple 5 is more than one, is embedded in 3 electric conductor surface of lead, 7 thickness side of insulating layer
To different location and transformer oil in, the lead-out wire of thermocouple 5 is drawn along 3 length direction of lead；The installation of down-lead bracket 2 is fixed
Inside oil groove 1, the lead-out wire of thermocouple 5 is fixed on down-lead bracket 2；3 both ends of lead are connect by bolt with power supply line 4,
Power supply line 4 is connect with power supply 10, and the lead-out wire of thermocouple 5 is connect with measuring instrument 11.
The quantity of the thermocouple 5 is 10-20, buries 7-9 thermocouple 5, adjacent thermoelectricity on 3 electric conductor surface of lead
Even 8 spacing of conductive surface temperature-sensitive point is 150mm；1 thermocouple 5, insulating layer sense are buried every 2-3mm along thickness of insulating layer direction
Warm spot 9 leans on medium position in 3 length direction of lead；3-5 are buried away from the lead wire insulation position layer surface 10mm in transformer oil
Thermocouple 5.
The electric conductor of the lead 3 is the fine copper stick of long 1200-1500mm, Φ 20- Φ 50, and both ends are in flattening shape, if
There is wiring hole；Insulating layer 7 is with a thickness of 10-20mm.
A kind of current carrying lead Thermal Parameter measurement method comprising the steps of: 1. lead electric conductor is long 1200-
The fine copper stick of 1500mm, Φ 20- Φ 50, both ends flattening, milling flat beat wiring hole, outsourcing insulating paper 5-20mm；2. in lead packet
During insulating layer, 7-9 thermocouple is buried on leading-in conductor surface, neighboring thermocouple conductive surface temperature-sensitive point spacing is about
150mm buries 1 thermocouple every 2-3mm along thickness of insulating layer direction, and insulating layer temperature-sensitive point leans on middle part in wire length direction
3-5 thermocouple is buried away from the lead wire insulation position layer surface 10mm in transformer oil in position, and the lead-out wire of thermocouple is along lead
Length direction is drawn；3. down-lead bracket is fixed on inside oil groove, then the lead for having buried thermocouple is fixed on and is drawn
On line bracket；4. lead both ends are connect by bolt with power supply line, power supply line connects to power supply again, the lead-out wire of thermocouple and survey
Measuring appratus connection, injects oil groove for transformer oil later；5. after powering on, lead flows through current heating, steady to wire temperature
After fixed, with thermocouple measurement electric conductor surface, the temperature of insulating layer different location and transformer oil；6. according to measured temperature meter
Calculate the Thermal Parameters such as lead temperature rise, the thermal coefficient of insulating materials, wire surface coefficient of heat transfer；7. the size for changing electric current can
The relation data of lead loss density and temperature rise is measured, the thickness for changing lead wire insulation layer can measure lead outsourcing insulation thickness
The relation data of degree and temperature rise.
Claims (4)
1. a kind of current carrying lead Thermal Parameter measuring device, it is characterised in that: include oil groove (1), down-lead bracket (2), lead
(3), power supply line (4), thermocouple (5) and transformer oil (6), transformer oil (6) injection are arranged in oil groove (1)；Lead
It (3) include electric conductor and insulating layer (7), the outside of electric conductor is arranged in package；The quantity of thermocouple (5) is more than one, is buried
Be located at lead (3) electric conductor surface, insulating layer (7) thickness direction different location and transformer oil in, the extraction of thermocouple (5)
Line is drawn along lead (3) length direction；Down-lead bracket (2) is fixed on oil groove (1) inside, and the lead-out wire of thermocouple (5) is solid
It is scheduled on down-lead bracket (2)；Lead (3) both ends are connect by bolt with power supply line (4), and power supply line (4) is connect with power supply (10),
The lead-out wire of thermocouple (5) is connect with measuring instrument (11).
2. a kind of current carrying lead Thermal Parameter measuring device according to claim 1, it is characterised in that: the thermocouple
(5) quantity is 10-20, buries 7-9 thermocouple (5), neighboring thermocouple conductive surface sense on lead (3) electric conductor surface
Warm spot (8) spacing is 150mm；1 thermocouple (5), insulating layer temperature-sensitive point (9) are buried every 2-3mm along thickness of insulating layer direction
Medium position is leaned in lead (3) length direction；3-5 thermoelectricity is buried away from the lead wire insulation position layer surface 10mm in transformer oil
Even (5).
3. a kind of current carrying lead Thermal Parameter measuring device according to claim 1, it is characterised in that: the lead
(3) electric conductor is the fine copper stick of long 1200-1500mm, Φ 20- Φ 50, and both ends are equipped with wiring hole in shape is flattened；Insulating layer
(7) with a thickness of 10-20mm.
4. a kind of current carrying lead Thermal Parameter measurement method, it is characterised in that comprise the steps of: that 1. lead electric conductor is length
The fine copper stick of 1200-1500mm, Φ 20- Φ 50, both ends flattening, milling flat beat wiring hole, outsourcing insulating paper 5-20mm；2.
During lead packet insulating layer, 7-9 thermocouple, neighboring thermocouple conductive surface temperature-sensitive point are buried on lead electric conductor surface
Spacing about 150mm buries 1 thermocouple every 2-3mm along thickness of insulating layer direction, and insulating layer temperature-sensitive point is in wire length direction
By medium position, 3-5 thermocouple, the lead-out wire of thermocouple are buried away from the lead wire insulation position layer surface 10mm in transformer oil
It is drawn along wire length direction；3. down-lead bracket is fixed on inside oil groove, then the lead for having buried thermocouple is consolidated
It is scheduled on down-lead bracket；4. lead both ends are connect by bolt with power supply line, power supply line connects to power supply again, the extraction of thermocouple
Line is connect with measuring instrument, and transformer oil is injected oil groove later；5. after powering on, lead flows through current heating, to lead
After temperature is stablized, with thermocouple measurement electric conductor surface, the temperature of insulating layer different location and transformer oil；6. being surveyed according to temperature
The Thermal Parameters such as the temperature rise of magnitude calculation lead, the thermal coefficient of insulating materials, wire surface coefficient of heat transfer；7. changing electric current
Size can measure the relation data of lead loss density and temperature rise, and the thickness for changing lead wire insulation layer can measure lead outsourcing
The relation data of insulation thickness and temperature rise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423042.9A CN110082604A (en) | 2019-05-21 | 2019-05-21 | A kind of current carrying lead Thermal Parameter measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910423042.9A CN110082604A (en) | 2019-05-21 | 2019-05-21 | A kind of current carrying lead Thermal Parameter measuring device and measuring method |
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| Publication Number | Publication Date |
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| CN110082604A true CN110082604A (en) | 2019-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910423042.9A Pending CN110082604A (en) | 2019-05-21 | 2019-05-21 | A kind of current carrying lead Thermal Parameter measuring device and measuring method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202182920U (en) * | 2011-07-12 | 2012-04-04 | 国网电力科学研究院 | Temperature rise test device for ultra/extra-high-pressure oil-SF6 casing pipe |
| CN103576007A (en) * | 2012-07-19 | 2014-02-12 | 远东电缆有限公司 | Carbon fiber reinforced core overhead insulated cable current-carrying capacity heating test device and test method thereof |
| CN104076232A (en) * | 2014-07-17 | 2014-10-01 | 国网上海市电力公司 | Transformer oil-paper insulation electricity-heating unite ageing test device |
| CN104267293A (en) * | 2014-10-17 | 2015-01-07 | 国家电网公司 | High-voltage testing device and method |
| CN105372293A (en) * | 2015-12-16 | 2016-03-02 | 保定天威保变电气股份有限公司 | Method and device for measuring cooling coefficient of medium on surface of metal plate |
| CN109374146A (en) * | 2018-11-30 | 2019-02-22 | 保定天威保变电气股份有限公司 | A kind of experimental provision and method for verifying transformer temperature field simulation calculation |
| CN210071944U (en) * | 2019-05-21 | 2020-02-14 | 保定天威保变电气股份有限公司 | Current-carrying lead thermal performance parameter measuring device |
-
2019
- 2019-05-21 CN CN201910423042.9A patent/CN110082604A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202182920U (en) * | 2011-07-12 | 2012-04-04 | 国网电力科学研究院 | Temperature rise test device for ultra/extra-high-pressure oil-SF6 casing pipe |
| CN103576007A (en) * | 2012-07-19 | 2014-02-12 | 远东电缆有限公司 | Carbon fiber reinforced core overhead insulated cable current-carrying capacity heating test device and test method thereof |
| CN104076232A (en) * | 2014-07-17 | 2014-10-01 | 国网上海市电力公司 | Transformer oil-paper insulation electricity-heating unite ageing test device |
| CN104267293A (en) * | 2014-10-17 | 2015-01-07 | 国家电网公司 | High-voltage testing device and method |
| CN105372293A (en) * | 2015-12-16 | 2016-03-02 | 保定天威保变电气股份有限公司 | Method and device for measuring cooling coefficient of medium on surface of metal plate |
| CN109374146A (en) * | 2018-11-30 | 2019-02-22 | 保定天威保变电气股份有限公司 | A kind of experimental provision and method for verifying transformer temperature field simulation calculation |
| CN210071944U (en) * | 2019-05-21 | 2020-02-14 | 保定天威保变电气股份有限公司 | Current-carrying lead thermal performance parameter measuring device |
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