CN102384968A - Test device for evaluating service life of transformer oil - Google Patents
Test device for evaluating service life of transformer oil Download PDFInfo
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- CN102384968A CN102384968A CN2010102733051A CN201010273305A CN102384968A CN 102384968 A CN102384968 A CN 102384968A CN 2010102733051 A CN2010102733051 A CN 2010102733051A CN 201010273305 A CN201010273305 A CN 201010273305A CN 102384968 A CN102384968 A CN 102384968A
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Abstract
The invention relates to a test device for evaluating service life of transformer oil, mainly solving the problem that the existing technology can not provide a test device which conforms to practical application environment of transformer oil for evaluating service life of transformer oil,. The test device comprises a test oil tank, a test transformer, a heating device, a test control system and a visual management control system; an oil tank cover interface device is provided with a sensor terminal for monitoring and controlling temperature, an oxygen input pipeline, a high voltage lead, a test transformer primary power source connecting terminal and a test transformer secondary load connecting terminal; the test control system comprises a digital temperature controller, an oxygen flow controller, a test high voltage instrument and an alternating current voltage stabilizer; the heating device is set at the bottom of the test oil tank; the visual management monitor system comprises a visual operation managing subsystem and a state monitoring subsystem. The invention can be applied in industrial production for evaluating the service life of the transformer oil.
Description
Technical field
The present invention relates to a kind of transformer oil test unit in serviceable life that is used to estimate.
Background technology
Transformer oil is one of stock that uses in the power transmission system, in oil-filled electrical equipments such as transformer, reactor, mutual inductor, switch, mainly plays insulation and cooling heat dissipation effect.Because electrical equipment is in the defeated change process of electric power; Transformer oil can receive the influence of factors such as oxygen, temperature, electric field, metal, insulating material and chemical reactions such as oxidation, cracking take place; Generate oxides such as a large amount of superoxide and alcohol, aldehyde, ketone, acid; Generate insolubless such as greasy filth again through condensation reaction, cause oil quality deterioration, reduce serviceable life.Therefore, the transformer oil antioxygenic property is the important quality index of transformer oil.
There are multiple technologies and method can estimate the transformer oil antioxygenic property at present.Disclosed common method has thermal analyzer method, rotary oxygen bomb method, aging test method, oxidation test method and site test method.
The thermal analyzer method be adopt High Pressure Difference scanning calorimeter instrument (PDSC) with sample under high temperature and oxygen press strip spare; Make the rapid oxidation of transformer oil, degraded; Emit a large amount of heats, obtain oil sample to be measured and comprise the Thermogram that opens beginning oxidization time and oxidation heat liberation summit time heat content change information.Oil sample open the beginning oxidization time be the oxidation induction period of oil sample, it has partly reflected the antioxygenic property of oil product.Advantage is that sampling amount is few, detection time is fast; Deficiency is the thermo oxidative stability that it has only detected oil product, can not be used for estimating objectively the actual antioxygenic property of oil product.
The rotary oxygen bomb method is the another kind of rapid method for assessment of transformer oil oxidation stability.Test principle is that sample, distilled water and copper catalyst coil are put in the glass vessel with cover together, puts it into then and is equipped with in the manometric oxygen bomb.Oxygen bomb at room temperature charges into the oxygen of 620KPa pressure, puts into 140 ℃ oil bath.Oxygen bomb becomes 30 ° angle with surface level, with the velocity axis of 100r/min to rotation.When the pressure that reaches regulation falls, stop test, the record test period is as the oxidation stability of sample.Advantage is that detection time is shorter relatively, and test operation is simple relatively; Deficiency be since just partial simulation the condition of work of transformer oil, so evaluation result has certain limitation.
The aging test method is in certain sample, to add copper wire, and puts it in 115 ℃ the baking oven aging 72 hours, investigates oil product acid number and outward appearance (like the greasy filth generation).Advantage is that facility is simple, tests easy.Deficiency is that evaluation method is single relatively.
Existing have the method for two kinds of oxidation tests to estimate the transformer oil antioxygenic property.The one, the oxidation test method of stipulating among the transformer oil standard GB 2536-90, the 2nd, adopt transformer oil oxidation test method among the transformer oil international standard IEC60296-2003.Their test principle all is to utilize copper wire as catalyzer, the greasy filth of investigation oil product generation under uniform temperature (as 110～120 ℃), certain gas (air or oxygen) atmosphere and the situation of acid number.Since test method all just simulated transformer oil heating and with copper wire as the catalyzer situation under the situation of oil product aged deterioration; With other materials (like iron core, insulating paper etc.) of transformer in the actual motion and apply voltage condition and still have certain difference, so evaluation result has certain limitation.
The site test method is exactly sample to be packed into investigate the usability of sample in the actual Working transformer.Advantage is the whole usability of the most truly and reliably reacting sample.Shortcoming is that experimental period is long, to take the manpower financial capacity big.
In sum, because the oxidizing process of transformer oil in service is very complicated, this is because the complicacy that oily structure own is formed and the polytrope of external oxidation condition.To make quick, correct evaluation to the actual usability of transformer oil; Corresponding experimental technique and facility must be arranged; Also lack suitablely, inexpensive at present, and estimate the test unit of transformer oil oxidation susceptibility with more approaching being used to of transformer oil actual operating mode.
Summary of the invention
Technical matters to be solved by this invention be prior art can not provide meet the transformer oil actual application environment be used to estimate the transformer oil test unit problem in serviceable life, and a kind of transformer oil test unit in serviceable life that is used to estimate is provided.That this device has is suitable, stable, accurate, safety, economy, easy-operating characteristics.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is following: a kind ofly be used to estimate the transformer oil test unit in serviceable life, comprise test fuel tank 1, testing transformer 2, heating arrangement 16, experiment control system 3 and visualized management supervisory system 4;
Wherein, testing transformer 2 places test fuel tank 1;
Visualized management supervisory system 4 links to each other with experiment control system 3 through network interface.
In the technique scheme, test fuel tank 1 casing arranged outside has thermal insulating warm-keeping layer.Test fuel tank 1 upper end also is provided with the thermometer 15 that is used to show specimen temperature.Digital temperature control 5 provides dual PID specimen temperature control and shows, and real time temperature information is passed to condition monitoring subsystem 9.AC voltage regulator 8 offers the stable three-phase alternating voltage of testing transformer, and the load Automatic Optimal is joined preface, simultaneously testing transformer real-time working voltage and load current information is passed to the condition monitoring subsystem.Test high pressure appearance 7 provides stable test high pressure for testing transformer, and real-time working high pressure and high-tension current information are passed to the condition monitoring subsystem.Oxygen flow controller 6 provides the required constant oxygen flow of test and shows, gives the condition monitoring subsystem with real-time oxygen flow data transfer simultaneously.Visualized management supervisory system 4 comprises visualized operation ADMINISTRATION SUBSYSTEM and condition monitoring subsystem.Man machine operation interface and management that the visualized operation ADMINISTRATION SUBSYSTEM provides test parameters to be provided with, condition monitoring subsystem provide visual real-time running state to keep watch on and handle.
Among the present invention, fuel tank cap interface arrangement 9 is provided with oxygen input tube road 11, is connected with the oxygen flow controller 6 of experiment control system, and the experimental enviroment of aerobic is provided.Fuel tank cap interface arrangement 9 is provided with high-voltage connection 12, and high-field electrode is connected with the test high pressure appearance 7 of experiment control system through high-voltage connection 12, and the high-voltage electric field of test is provided.Fuel tank cap interface arrangement 9 is provided with testing transformer primary source 13 and secondary load connection terminal 14, is connected with the AC voltage regulator 8 of experiment control system, provides the transformer energising that the experimental enviroment of carrying is arranged.Fuel tank cap interface arrangement 9 is provided with monitoring and control two-way temperature sensor terminals 10, with the digital temperature control 5 of experiment control system
Be connected, provide stable specimen temperature and temperature fault to dispose.
When apparatus of the present invention are used, pour testing transformer oil into the test fuel tank, testing transformer oil is fully contacted with testing transformer.
In apparatus of the present invention because each test parameters can effectively control, and intelligentized operational management, guaranteed test efficient and result correctly; The maltilevel security safeguard measure has guaranteed the safe and reliable of long period long duration test with fault disposal automatically, needn't worry the empirical risk and the high experimentation cost artificial on duty in 24 hours of HTHP.The invention provides a kind of and the more approaching transformer oil oxidation test device of transformer oil actual application environment; Testing transformer test parameters (temperature, oxygen flow, transformer load, test high pressure) is provided with by the transformer oil actual operating mode; Guaranteed the test unit actual working environment of analogue transformer oil in power transformer well; Test findings and transformer oil have good corresponding relation actual life; Have suitable, stable, accurate, safe, easy-operating characteristics, obtained better technical effect.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention.
Among Fig. 1,1 is the test fuel tank, and 2 is testing transformer, and 3 is experiment control system, and 4 is the visualized management supervisory system; 5 is digital temperature control, and 6 is the oxygen flow controller, and 7 are test high pressure appearance, and 8 is AC voltage regulator; 9 is the fuel tank cap interface arrangement, and 10 is the temperature sensor terminals, and 11 is the oxygen input tube road, and 12 is high-voltage connection; 13 is testing transformer primary source connection terminal, and 14 is testing transformer secondary load connection terminal, and 15 is electrode, and 16 is heating arrangement.
Among Fig. 1, be used to estimate the transformer oil test unit in serviceable life, comprise test fuel tank 1, testing transformer 2, heating arrangement 16, experiment control system 3 and visualized management supervisory system 4; Wherein, testing transformer 2 places test fuel tank 1; Test fuel tank 1 is provided with fuel tank cap interface arrangement 9, is provided with electrode 15 in the test fuel tank 1; Fuel tank cap interface arrangement 9 is provided with sensor terminals 10, oxygen input tube road 11, high-voltage connection 12, testing transformer primary source connection terminal 13 and the testing transformer secondary load connection terminal 14 of monitoring and control temperature; Experiment control system 3 comprises digital temperature control 5, oxygen flow controller 6, test high pressure appearance 7 and AC voltage regulator 8; Wherein, Digital temperature control 5 links to each other with sensor terminals 10; Oxygen flow controller 6 links to each other with oxygen input tube road 11; Test high pressure appearance 7 links to each other with electrode 15 through high-voltage connection 12, and AC voltage regulator 8 links to each other with testing transformer secondary load connection terminal 14 with testing transformer primary source connection terminal 13; Heating arrangement 16 is arranged at test fuel tank 1 bottom, links to each other with digital temperature control 5; Visualized management supervisory system 4 comprises visualized operation ADMINISTRATION SUBSYSTEM and condition monitoring subsystem; Visualized management supervisory system 4 links to each other with experiment control system 3 through network interface.
Through embodiment the present invention is done further elaboration below.
Embodiment
The testing transformer oiliness can be analyzed before the test.Specifically see table 1.
Table 1
Can find out that from the performance data of table 1 each testing transformer oil all has electric property preferably.But see that from oxidation stability the oxidation susceptibility of A1, A2 and A3 oil sample is better, and B and D oil sample oxidation susceptibility are taken second place, and the oxidation susceptibility of C sample is the poorest.According to practical situations, the C product generally is used for the small low-voltage transformer, and products such as D can be used for middle and high pressure transformer.Therefore, the comprehensive many-sided situation analysis of above-mentioned several samples can be divided three classes it by quality-ordered:
I class: have better performance transformer oil, A2, A3 oil sample
The II class has the superperformance transformer oil, A1, B, D oil sample
III class: poor-performing transformer oil, C oil sample
[embodiment 1]
Adopt device shown in Figure 1, to A1, A2, A3, B, C and the continuous service test of D sample, survey data through the visual inspection of test oil sample monitored item and investigate and evaluation experimental device by the test condition of setting.When the sample acid number corrupts to the limit value index stipulated in the GB/T14542 standard (0.1 milligram of KOH/ gram), the record test period, and should the time respectively as sample to oxidation life time that should performance index.Specifically see table 2.
The test condition of transformer oil is: 95 ℃ of temperature, oxygen flow 40 ml/min, 8100 volts of voltages; The test condition of transformer is: 330 volts of primary voltages, 220 volts of secondary voltages, load current 4.5 peaces.
Table 2
| Oil sample | A1 | A2 | A3 | B | C | D |
| Test duration, hour | 1994 | 3143 | 3270 | 1725 | 687 | 2147 |
Can find out from table 2,, to test oil sample performance superior and inferior evaluating be in proper order: A3, A2, D, A1, B, C according to the test duration.The test evaluation result fits like a glove with the performance evaluation and the practical situations of test appearance.That is: A2, A3 oil sample are the I class, have better performance transformer oil; A1, B, D oil sample are the II class, have the superperformance transformer oil, the C oil sample is the III class, the poor-performing transformer oil.Draw thus, the present invention has good differentiation property to the transformer oil evaluation of different qualities, and the result is correct.
[embodiment 2]
Adopt device shown in Figure 1 to run without interruption continuously 8500 hours, each item test parameters control stabilization is provided with parameter and is: temperature is 95 ℃, and oxygen flow is 34 ml/min, and the transformer WV is 330 volts, and trial voltage is 8100 volts.The temperature departure is less than 0.5%, and the oxygen flow departure is less than 0.3%; System's long period endurance running is safe and reliable, errorless, and failure rate is zero, needn't worry the empirical risk and the high experimentation cost artificial on duty in 24 hours of HTHP.
[comparative example]
Use prior art IEC61125 oxidation test method: utilize copper wire as catalyzer, under 120 ℃ of temperature, air mass flow 2.5 ml/min, 500 hours condition of test period, investigate the antioxygenic property of A1, A2, A3 oil sample.The acid number testing result of test back oil sample is seen table 3.
Table 3
| Oil sample | The IEC60296-2003 index | A1 | A2 | A3 |
| Total acid number after the oxidation, milligram KOH/ gram | ?≯1.2 | 0.0845 | 0.0422 | 0.0478 |
Can find out that from table 3 result data the antioxygenic property that A1, A2, A3 are showed in this test does not have evident difference, this and practical situations are not inconsistent.Adopt apparatus of the present invention then can correctly estimate the antioxygenic property of transformer oil, the transformer oil evaluation of different qualities is had good differentiation property.In addition, adopt prior art IEC61125 oxidation test method, need manual work in 24 hours on duty; Temperature, air mass flow, transformer load, test high pressure can not be controlled automatically; When breaking down, experiment can only stop, and also must be noted that the empirical risk of HTHP when operating simultaneously.
Claims (9)
1. one kind is used to estimate the transformer oil test unit in serviceable life, comprises test fuel tank (1), testing transformer (2), heating arrangement (16), experiment control system (3) and visualized management supervisory system (4);
Wherein, testing transformer (2) places test fuel tank (1);
Test fuel tank (1) is provided with fuel tank cap interface arrangement (9), is provided with electrode (15) in the test fuel tank (1); Fuel tank cap interface arrangement (9) is provided with sensor terminals (10), oxygen input tube road (11), high-voltage connection (12), testing transformer primary source connection terminal (13) and the testing transformer secondary load connection terminal (14) of monitoring and control temperature;
Experiment control system (3) comprises digital temperature control (5), oxygen flow controller (6), test high pressure appearance (7) and AC voltage regulator (8); Wherein, Digital temperature control (5) links to each other with sensor terminals (10); Oxygen flow controller (6) links to each other with oxygen input tube road (11); Test high pressure appearance (7) links to each other with electrode (15) through high-voltage connection (12), and AC voltage regulator (8) links to each other with testing transformer secondary load connection terminal (14) with testing transformer primary source connection terminal (13);
Heating arrangement (16) is arranged at test fuel tank (1) bottom, links to each other with digital temperature control (5);
Visualized management supervisory system (4) links to each other with experiment control system (3) through network interface.
2. be used to estimate the transformer oil test unit in serviceable life according to claim 1 is said, it is characterized in that testing fuel tank (1) casing arranged outside has thermal insulating warm-keeping layer.
3. be used to estimate the transformer oil test unit in serviceable life according to claim 1 is said, it is characterized in that testing fuel tank (1) upper end and also be provided with the thermometer (15) that is used to show specimen temperature.
4. be used to estimate the transformer oil test unit in serviceable life according to claim 1 is said, it is characterized in that digital temperature control (5) provides dual PID specimen temperature control and shows, and real time temperature information is passed to condition monitoring subsystem (9).
5. be used to estimate the transformer oil test unit in serviceable life according to claim 1 is said; It is characterized in that described AC voltage regulator (8) offers the stable three-phase alternating voltage of testing transformer; And the load Automatic Optimal joined preface, simultaneously testing transformer real-time working voltage and load current information are passed to the condition monitoring subsystem.
6. be used to estimate the transformer oil test unit in serviceable life according to claim 1 is said; It is characterized in that testing high pressure appearance (7) provides stable test high pressure for testing transformer, and real-time working high pressure and high-tension current information are passed to the condition monitoring subsystem.
7. be used to estimate the transformer oil test unit in serviceable life according to claim 1 is said, it is characterized in that oxygen flow controller (6) provides the required constant oxygen flow of test and shows, gives the condition monitoring subsystem with real-time oxygen flow data transfer simultaneously.
8. be used to estimate the transformer oil test unit in serviceable life according to claim 1 is said, it is characterized in that visualized management supervisory system (4) comprises visualized operation ADMINISTRATION SUBSYSTEM and condition monitoring subsystem.
9. saidly according to Claim 8 be used to estimate the transformer oil test unit in serviceable life; It is characterized in that man machine operation interface and management that the visualized operation ADMINISTRATION SUBSYSTEM provides test parameters to be provided with, the condition monitoring subsystem provides visual real-time running state to keep watch on and handle.
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| CN2010102733051A CN102384968A (en) | 2010-09-03 | 2010-09-03 | Test device for evaluating service life of transformer oil |
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| CN2010102733051A CN102384968A (en) | 2010-09-03 | 2010-09-03 | Test device for evaluating service life of transformer oil |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699792A (en) * | 2014-11-25 | 2016-06-22 | 国网辽宁省电力有限公司丹东供电公司 | Distribution network transformer oil tank residual life prediction method and device |
| WO2017096656A1 (en) * | 2015-12-07 | 2017-06-15 | 海卓赛思（苏州）传感技术有限公司 | Transmitter for online monitoring of moisture, hydrogen content, and temperature of transformer |
| CN107300612A (en) * | 2017-08-08 | 2017-10-27 | 中国石油化工股份有限公司 | Transformer oil oxidation test control system and its control method |
| CN111077289A (en) * | 2019-12-17 | 2020-04-28 | 中电华创电力技术研究有限公司 | Multifunctional oil quality degradation simulation test device and method |
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| CN101408578A (en) * | 2008-11-21 | 2009-04-15 | 重庆大学 | Multiple factors accelerated aging test apparatus and method for oil paper insulation of transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699792A (en) * | 2014-11-25 | 2016-06-22 | 国网辽宁省电力有限公司丹东供电公司 | Distribution network transformer oil tank residual life prediction method and device |
| CN105699792B (en) * | 2014-11-25 | 2018-08-17 | 国网辽宁省电力有限公司丹东供电公司 | A kind of network distribution transformer fuel tank method for predicting residual useful life and device |
| WO2017096656A1 (en) * | 2015-12-07 | 2017-06-15 | 海卓赛思（苏州）传感技术有限公司 | Transmitter for online monitoring of moisture, hydrogen content, and temperature of transformer |
| CN107300612A (en) * | 2017-08-08 | 2017-10-27 | 中国石油化工股份有限公司 | Transformer oil oxidation test control system and its control method |
| CN111077289A (en) * | 2019-12-17 | 2020-04-28 | 中电华创电力技术研究有限公司 | Multifunctional oil quality degradation simulation test device and method |
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Application publication date: 20120321 |