CN109239479A - A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process - Google Patents
A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process Download PDFInfo
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- CN109239479A CN109239479A CN201810783960.8A CN201810783960A CN109239479A CN 109239479 A CN109239479 A CN 109239479A CN 201810783960 A CN201810783960 A CN 201810783960A CN 109239479 A CN109239479 A CN 109239479A
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- Prior art keywords
- distribution transformer
- oil immersion
- type distribution
- resistance
- instrument
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The present invention relates to a kind of methods of automatic measurement oil immersion-type distribution transformer temperature rise test overall process, including industrial personal computer, temperature polling instrument, instrument for measuring DC resistance and contactor, power supply is connected on instrument for measuring DC resistance, power supply is electrically connected by conducting wire with instrument for measuring DC resistance, contactor includes normally-closed contact, and normally-closed contact is arranged on conducting wire；Advantages of the present invention: the temperature variations and resistance variations situation during test are recorded in real time by industrial personal computer, line temperature rise test is disconnected compared to conventional manual, this test method eliminates the manual intervention in test, test process and test process more automated intelligent, it has liberated manpower and has improved work efficiency, guarantee the success rate and stability of temperature rise test, and the normally-closed contact of contactor is arranged on the conducting wire of power supply and instrument for measuring DC resistance, conducting wire can timely be connected when contactor disconnects, the resistance of oil immersion-type distribution transformer can quickly be obtained, ensure the reliability detected.
Description
Technical field
The present invention relates to a kind of methods of automatic measurement oil immersion-type distribution transformer temperature rise test overall process.
Background technique
Alternating voltage and electric current are converted according to the law of electromagnetic induction and transmit alternating current in distribution transformer assignment electric system
A kind of static electric appliance of energy, to ensure that power grid essential safety and equipment are firm reliable, the sampling observation of networking goods and materials is that Utilities Electric Co. carries out
The important means of distribution net equipment quality control work.Currently, each annual distribution transformer amount of purchase of provincial electric power company is up to 12000
More than, by 10% sampling observation rate sampling observation amount up to more than 1200 platforms, this requires detection unit monthly test is measured variable need to be up to more than 100 platforms.
And in distribution transforming sampling examination, temperature rise test time-consuming longest, and oil immersion-type distribution transformer needs 8~12 hours, temperature rise test
Belong to the type approval test in distribution transformer test, it is to verify whether distribution transformer design structure and cooling system close
Reason is the important tests for examining distribution transformer service life and safe operation.At this stage to distribution transformer temperature rise test
There are many research, but focus primarily upon technological design and uncertainty calculation, and existing temperature rise test is completed to divide by testing staff
Analysis calculates, and substantially increases the investment of manpower, and tests and be easy by human intervention, cause entire test efficiency low and test at
Power is low.
Summary of the invention
It is complete the technical problem to be solved in the present invention is to provide a kind of automatic measurement oil immersion-type distribution transformer temperature rise test
The method of process solves existing technical problem.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions: a kind of automatic measurement oil immersion
The method of formula distribution transformer temperature rise test overall process, including industrial personal computer, temperature polling instrument, instrument for measuring DC resistance and contact
Device, the temperature polling instrument and instrument for measuring DC resistance are connected with industrial personal computer, acquire oil immersion-type distribution by temperature polling instrument
The temperature of transformer is simultaneously transmitted to industrial personal computer storage and analysis, acquires oil immersion-type distribution transformer by instrument for measuring DC resistance
Resistance is simultaneously transmitted to industrial personal computer storage and analysis, is connected with power supply, the power supply on the instrument for measuring DC resistance
It is electrically connected by conducting wire with instrument for measuring DC resistance, the contactor includes normally opened contact and normally-closed contact, the normally-closed contact
Be arranged on conducting wire, the normally opened contact is arranged on the supply lines of contactor and oil immersion-type distribution transformer, successively include with
Lower step:
Step 1: it arranges the experimental enviroment of oil immersion-type distribution transformer, and test is carried out to oil immersion-type distribution transformer and is connect
Line；
Step 2: the test parameters of oil immersion-type distribution transformer is set by industrial personal computer, and is tested by D.C. resistance
The cold resistance of instrument measurement oil immersion-type distribution transformer is simultaneously recorded by industrial personal computer；
Step 3: by contactor to oil immersion-type distribution transformer power transmission, total losses are automatically controlled, and are remembered every 10min
Each temperature measuring point temperature is recorded, while keeping the real time monitoring of abnormal conditions；
Step 4: whether the oil immersion-type distribution transformer after three power transmission of obtaining step there is exception, when oil immersion-type distribution becomes
When depressor does not occur abnormal, then five are entered step, when parameter protection or when the temperature is excessively high occurs in oil immersion-type distribution transformer, then
Terminate test:
Step 5: power transmission is kept to oil immersion-type distribution transformer；
Step 6: obtaining the top layer liquid temperature rise variation of oil immersion-type distribution transformer, when top layer liquid temperature rise variation is less than
When 1K/h, then seven are entered step, when top layer liquid temperature rise variation is greater than 1K/h, then return step five；
Step 7: apply rated current to oil immersion-type distribution transformer, automatically control electric current, and record each survey every 5min
Warm spot temperature, while keeping the real time monitoring of abnormal conditions；
Step 8: whether the oil immersion-type distribution transformer after obtaining step seven there is exception, works as oil immersion-type distribution transformer
When not occurring abnormal, then nine are entered step, when parameter protection or when the temperature is excessively high occurs in oil immersion-type distribution transformer, then terminated
Test:
Step 9: power transmission is kept to oil immersion-type distribution transformer；
Step 10: the application time of the rated current of step 7 is determined whether more than 1h, when the application time of rated current
When more than 1h, then 11 are entered step, when the application time of rated current is less than 1h, then return step nine；
Step 11: powering off to oil immersion-type distribution transformer, measures oil immersion-type distribution transformation by instrument for measuring DC resistance
Device high and low pressure side thermal resistance, and temperature rise result is calculated and audited by industrial personal computer.
Preferably, the experimental enviroment in step 1 includes temperature measuring point and lubricating cup, and the test connection in step 1 passes through short circuit
Method wiring.
Preferably, the supply lines is soft copper conducting wire.
In conclusion advantages of the present invention: 1. record the temperature variations during test by industrial personal computer in real time
With resistance variations situation, line temperature rise test is disconnected compared to conventional manual, this test method eliminates artificial dry in test
In advance, process and test process more automated intelligent are tested, manpower has been liberated and has improved work efficiency, guaranteed the success of temperature rise test
Rate and stability, and the power transmission and power-off to oil immersion-type distribution transformer are realized by contactor, it can be in real time in transmission process
Automatic monitoring oil immersion-type distribution transformer temperature, and automatically powered off to being able to achieve in the case of temperature anomaly, and judge automatically
Whether temperature rise is stable, finally can automatically power off and measure thermal resistance, obtains temperature rise calculated result and provides conclusion (of pressure testing), and will connect
The normally-closed contact of tentaculum is arranged on the conducting wire of power supply and instrument for measuring DC resistance, can timely lead when contactor disconnects
Admittance line can quickly obtain the resistance of oil immersion-type distribution transformer, it is ensured that the reliability of detection；
2. temperature measuring point and lubricating cup can quickly obtain the real time temperature during oil immersion-type distribution transformer temperature rise, by dividing
The temperature change for analysing oil immersion-type distribution transformer bottom end and top, can improve the accuracy rate of detection, and shortening contact can ensure that test
The security performance of wiring；
3. soft copper conducting wire can ensure that the reliability that contactor is connect with oil immersion-type distribution transformer, and not by installation environment and
The limitation of angle, it is adaptable, it is easy for installation
Specific embodiment
A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process, including industrial personal computer, temperature patrol inspection
Instrument, instrument for measuring DC resistance and contactor, the temperature polling instrument and instrument for measuring DC resistance are connected with industrial personal computer, pass through temperature
The temperature of degree logging acquisition oil immersion-type distribution transformer is simultaneously transmitted to industrial personal computer storage and analysis, passes through instrument for measuring DC resistance
It acquires the resistance of oil immersion-type distribution transformer and is transmitted to industrial personal computer storage and analysis, be connected on the instrument for measuring DC resistance
Power supply, the power supply are electrically connected by conducting wire with instrument for measuring DC resistance, the contactor include normally opened contact with
Normally-closed contact, the normally-closed contact are arranged on conducting wire, and the normally opened contact is arranged in contactor and oil immersion-type distribution transformer
Supply lines on, successively the following steps are included:
Step 1: it arranges the experimental enviroment of oil immersion-type distribution transformer, and test is carried out to oil immersion-type distribution transformer and is connect
Line；
Step 2: the test parameters of oil immersion-type distribution transformer is set by industrial personal computer, and is tested by D.C. resistance
The cold resistance of instrument measurement oil immersion-type distribution transformer is simultaneously recorded by industrial personal computer；
Step 3: by contactor to oil immersion-type distribution transformer power transmission, total losses are automatically controlled, and are remembered every 10min
The temperature of each temperature measuring point is recorded, while keeping the real time monitoring of abnormal conditions；
Step 4: whether the oil immersion-type distribution transformer after three power transmission of obtaining step there is exception, when oil immersion-type distribution becomes
When depressor does not occur abnormal, then five are entered step, when parameter protection or when the temperature is excessively high occurs in oil immersion-type distribution transformer, then
Terminate test:
Step 5: power transmission is kept to oil immersion-type distribution transformer；
Step 6: obtaining the top layer liquid temperature rise variation of oil immersion-type distribution transformer, when top layer liquid temperature rise variation is less than
When 1K/h, then seven are entered step, when top layer liquid temperature rise variation is greater than 1K/h, then return step five；
Step 7: apply rated current to oil immersion-type distribution transformer, automatically control electric current, and record each survey every 5min
Warm spot temperature, while keeping the real time monitoring of abnormal conditions；
Step 8: whether the oil immersion-type distribution transformer after obtaining step seven there is exception, works as oil immersion-type distribution transformer
When not occurring abnormal, then nine are entered step, when parameter protection or when the temperature is excessively high occurs in oil immersion-type distribution transformer, then terminated
Test:
Step 9: power transmission is kept to oil immersion-type distribution transformer；
Step 10: the application time of the rated current of step 7 is determined whether more than 1h, when the application time of rated current
When more than 1h, then 11 are entered step, when the application time of rated current is less than 1h, then return step nine；
Step 11: powering off to oil immersion-type distribution transformer, measures oil immersion-type distribution transformation by instrument for measuring DC resistance
Device high and low pressure side thermal resistance, and temperature rise result is calculated and audited by industrial personal computer.
Experimental enviroment in step 1 includes temperature measuring point and lubricating cup, and the test connection in step 1 is surveyed by shortening contact
Warm spot and lubricating cup can quickly obtain the real time temperature during oil immersion-type distribution transformer temperature rise, by analyzing oil immersion-type distribution
The temperature change of transformer bottom end and top, can improve the accuracy rate of detection, and shortening contact can ensure that the safety of test connection
Energy；The supply lines is soft copper conducting wire, and soft copper conducting wire can ensure that the reliability that contactor is connect with oil immersion-type distribution transformer, and
It is not limited by installation environment and angle, it is adaptable, it is easy for installation.
In addition to above preferred embodiment, there are other embodiments of the invention, and those skilled in the art can be according to this
Invention makes various changes and modifications, and as long as it does not depart from the spirit of the invention, should belong to appended claims of the present invention and determines
The range of justice.
Claims (3)
1. a kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process, it is characterised in that: including industrial personal computer,
Temperature polling instrument, instrument for measuring DC resistance and contactor, the temperature polling instrument and instrument for measuring DC resistance with industrial personal computer phase
Even, the temperature of oil immersion-type distribution transformer is acquired by temperature polling instrument and is transmitted to industrial personal computer storage and analysis, pass through direct current
The resistance of resistance meter acquisition oil immersion-type distribution transformer is simultaneously transmitted to industrial personal computer storage and analysis, the D.C. resistance test
Power supply is connected on instrument, the power supply is electrically connected by conducting wire with instrument for measuring DC resistance, and the contactor includes
Normally opened contact and normally-closed contact, the normally-closed contact are arranged on conducting wire, and the normally opened contact is arranged in contactor and oil immersed type
On the supply lines of distribution transformer, successively the following steps are included:
Step 1: it arranges the experimental enviroment of oil immersion-type distribution transformer, and test connection is carried out to oil immersion-type distribution transformer；
Step 2: the test parameters of oil immersion-type distribution transformer is set by industrial personal computer, and is surveyed by instrument for measuring DC resistance
It measures the cold resistance of oil immersion-type distribution transformer and is recorded by industrial personal computer；
Step 3: by contactor to oil immersion-type distribution transformer power transmission, total losses are automatically controlled, and each every 10min record
The temperature of temperature measuring point, while keeping the real time monitoring of abnormal conditions；
Step 4: whether the oil immersion-type distribution transformer after three power transmission of obtaining step there is exception, works as oil immersion-type distribution transformer
When not occurring abnormal, then five are entered step, when parameter protection or when the temperature is excessively high occurs in oil immersion-type distribution transformer, then terminated
Test:
Step 5: power transmission is kept to oil immersion-type distribution transformer；
Step 6: obtaining the top layer liquid temperature rise variation of oil immersion-type distribution transformer, when top layer liquid temperature rise variation is less than 1K/h
When, then seven are entered step, when top layer liquid temperature rise variation is greater than 1K/h, then return step five；
Step 7: apply rated current to oil immersion-type distribution transformer, automatically control electric current, and record each temperature measuring point every 5min
Temperature, while keeping the real time monitoring of abnormal conditions；
Step 8: whether the oil immersion-type distribution transformer after obtaining step seven there is exception, when oil immersion-type distribution transformer does not have
When occurring abnormal, then nine are entered step, when parameter protection or when the temperature is excessively high occurs in oil immersion-type distribution transformer, then terminates to try
It tests:
Step 9: power transmission is kept to oil immersion-type distribution transformer；
Step 10: the application time of the rated current of step 7 is determined whether more than 1h, when the application time of rated current is more than
When 1h, then 11 are entered step, when the application time of rated current is less than 1h, then return step nine；
Step 11: powering off to oil immersion-type distribution transformer, and it is high to measure oil immersion-type distribution transformer by instrument for measuring DC resistance
Low-pressure side thermal resistance, and temperature rise result is calculated and audited by industrial personal computer.
2. a kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process according to claim 1,
Be characterized in that: the experimental enviroment in step 1 includes temperature measuring point and lubricating cup, and the test connection in step 1 passes through shortening contact.
3. a kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process according to claim 1,
Be characterized in that: the supply lines is soft copper conducting wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810783960.8A CN109239479A (en) | 2018-07-17 | 2018-07-17 | A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810783960.8A CN109239479A (en) | 2018-07-17 | 2018-07-17 | A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process |
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|---|---|
| CN109239479A true CN109239479A (en) | 2019-01-18 |
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|---|---|---|---|
| CN201810783960.8A Pending CN109239479A (en) | 2018-07-17 | 2018-07-17 | A kind of method of automatic measurement oil immersion-type distribution transformer temperature rise test overall process |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB288735A (en) * | 1927-01-17 | 1928-04-17 | Eric Douglas Tobias Norris | Improvements relating to the measurement of thermal conditions in oil-immersed electrical apparatus |
| US20100109883A1 (en) * | 2007-03-20 | 2010-05-06 | Eduardo Pedrosa Santos | Temperature monitoring system for power transformers submerged in oil |
| CN104344907A (en) * | 2013-07-23 | 2015-02-11 | 国家电网公司 | Distribution transformer temperature rise test winding temperature on-line test system and method |
-
2018
- 2018-07-17 CN CN201810783960.8A patent/CN109239479A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB288735A (en) * | 1927-01-17 | 1928-04-17 | Eric Douglas Tobias Norris | Improvements relating to the measurement of thermal conditions in oil-immersed electrical apparatus |
| US20100109883A1 (en) * | 2007-03-20 | 2010-05-06 | Eduardo Pedrosa Santos | Temperature monitoring system for power transformers submerged in oil |
| CN104344907A (en) * | 2013-07-23 | 2015-02-11 | 国家电网公司 | Distribution transformer temperature rise test winding temperature on-line test system and method |
Non-Patent Citations (1)
| Title |
|---|
| 郑志曜;李志;劳增江;柯定芳;余绍峰;: "一种配电变压器温升自动测量系统的研制", 浙江电力, vol. 37, no. 02, pages 16 - 21 * |
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