CN104036939A - Direct-current heating drying method and direct-current heating device used for large electric reactor on site - Google Patents
Direct-current heating drying method and direct-current heating device used for large electric reactor on site Download PDFInfo
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- CN104036939A CN104036939A CN201410311049.9A CN201410311049A CN104036939A CN 104036939 A CN104036939 A CN 104036939A CN 201410311049 A CN201410311049 A CN 201410311049A CN 104036939 A CN104036939 A CN 104036939A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 39
- 238000001035 drying Methods 0.000 title claims abstract description 22
- 239000003921 oils Substances 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims description 11
- 239000007921 sprays Substances 0.000 claims description 10
- 230000001681 protective Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005516 engineering processes Methods 0.000 abstract description 6
- 241001081830 Degeneriaceae Species 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 239000011514 iron Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000001276 controlling effects Effects 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 235000011194 food seasoning agent Nutrition 0.000 description 2
- 206010022114 Injuries Diseases 0.000 description 1
- 238000010586 diagrams Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 238000007616 round robin method Methods 0.000 description 1
Abstract
Description
Technical field
The present invention relates to reactor insulation dry technology, relate in particular to a kind of large-scale reactor In situ DC heating and drying method and DC heating device.
Background technology
When large-scale reactor is tested at the scene, often due to the reason such as transformer oil makes moist or temperature is low, and cause carrying out on-the-spot commissioning test.At present, the on-the-spot heat drying of Chinese large-sized power reactor still adopts traditional oil filter Circulation and Hot Oil Spray method, for the change of capacity, just increases Circulation and Hot Oil Spray time, pumpdown time and quiet putting the time, in-situ processing time length and inefficiency.In the situation that ambient temperature is very low, be subject to the restriction of oil filter heating efficiency, in Circulation and Hot Oil Spray, transformer oil can only be heated to lower temperature, even if extend the Circulation and Hot Oil Spray time, is also difficult to reach good drying effect.
Except deep fat round-robin method, adoptable reactor insulation drying means also comprises: fuel tank iron loss seasoning and excitation method.Wherein, the heat generation of fuel tank iron loss method, on fuel tank tank wall, then transmits to device body insulation by insulating oil, and the efficiency of heating surface is low, and insulated part temperature raises slow, and that excitation method cannot reach test is at the scene required to voltage.Therefore, fuel tank iron loss method and excitation method are not all suitable for on-the-spot heat drying processing super, extra-high voltage reactor.
Summary of the invention
The problem existing for solving above-mentioned insulation seasoning, the present invention utilizes the principle of DC heating technology, and a kind of method of large-scale reactor being carried out to In situ DC heat drying is provided, and has designed corresponding DC heating device for the method.
Large-scale reactor In situ DC heating and drying method of the present invention, concrete steps are as follows: first, treat the dry reactor winding of insulation and apply direct current, reactor heating in winding, is heated to assigned temperature from inside by the insulation of device body; Then, reactor is vacuumized to processing; Finally, reactor is carried out to Circulation and Hot Oil Spray processing.The present invention, by reactor winding is directly applied to direct voltage, makes to flow through direct current in winding, and the heat that utilizes reactor winding directly to hinder loss generation heats reactor.And then through vacuumizing and Circulation and Hot Oil Spray processing, take the moisture in insulation out of, thereby reach dry effect.To greatly improve like this efficiency of heating surface, shorten heating time.Meanwhile, due to this mode of heating be winding from the inner heat of device body, the drying effect of device body insulation is better than common Circulation and Hot Oil Spray method.
In the time reactor being carried out to DC heating test, measure and observe at any time the size of current applying by corresponding instrument, note the direct current applying to be controlled at the 70%-85% of reactor load current value.In the time that transformer oil temperature is too low, in the case of iron core not being caused unnecessary injury, can suitably regulate size of current.Like this can protection reactor iron core and coil, can reach again heating effect.
The DC heating device that said method is used, comprise AC power, voltage regulator, rectification circuit and voltmeter and ammeter, AC power is connected with voltage regulator input through the first circuit breaker, and output voltage regulator connects rectification circuit input end, and rectification circuit output end is connected with reactor; Between rectification circuit and reactor, be in series with the second circuit breaker, current protective device and ammeter, be parallel with voltmeter between the two.Voltage regulator is used for controlling Voltage-output size for voltage regulator, to reach the object of controlling rectifier cabinet output current size.Rectification circuit, for interchange is converted to direct current, is supplied with reactor, realizes DC heating.Voltmeter and ammeter, for measuring at any time the voltage and current of reactor, meet test requirements document.Circuit breaker has arc extinguishing effect, protects personal device security, can realize circuit load switching simultaneously.
Described voltage regulator is provided with voltage regulator control operation platform.After drop into test loop, control voltage regulator control loop, voltage regulator output voltage is started from scratch and rise to required magnitude of voltage.
Described AC power is 380V power supply.DC heating device required voltage is low, and 380V can meet the demands.
Described current protective device is fuse, and it act as in the time that electric current exceedes reactor rated current 85%, open circuit.
Described rectification circuit is three-phase six full-wave rectifying circuit of pulsing.
Beneficial effect of the present invention:
1. this DC heating apparatus structure is simple, and mobility is strong, and easy operating can meet the requirement of the on-the-spot heat run of large-scale reactor.
2. in this DC heating technology situation that temperature is very low at the scene, transformer oil can be elevated to more than 70 DEG C, can reach fast dry object; Under equal experimental condition, Circulation and Hot Oil Spray method can only be elevated to temperature of oil in transformer 50 DEG C of left and right, does not reach dry object.
3. this DC heating technology drying effect is good, and homogeneous heating and efficiency are high, and the dry processing duration is shortened greatly, is suitable for the on-the-spot heat drying of large-scale reactor.Meanwhile, can also carry out scene heating to large-scale super extra-high voltage reactor and other various middle-size and small-size reactors.
Brief description of the drawings
Fig. 1 is the elementary diagram of DC heating device of the present invention;
1, AC power, 2, the first circuit breaker, 3, voltage regulator, 4, voltage regulator control operation platform, 5, rectification circuit, 6, the second circuit breaker, 7, fuse, 8, ammeter, 9, voltmeter, 10, reactor.
Embodiment
A kind of large-scale reactor In situ DC heater, as shown in the figure, comprise 380V AC power 1, voltage regulator 3, rectification circuit 5 and voltmeter 9 and ammeter 8, AC power 1 is connected with voltage regulator 3 inputs through the first circuit breaker 2, voltage regulator 3 is exported termination rectification circuit 5 inputs, and rectification circuit 5 outputs are connected with reactor 10; Between rectification circuit 5 and reactor 10, be in series with the second circuit breaker 6, fuse 7 and ammeter 8, be parallel with voltmeter 9 between the two.Described voltage regulator 3 is provided with voltage regulator control operation platform 4.Described rectification circuit adopts three-phase six full-wave rectifying circuit of pulsing.
AC power output 380V alternating voltage, regulated as required the ratio of voltage regulator by voltage regulator control operation platform, make voltage regulator output voltage can ensure that rectifier cabinet output current is within the scope of 70% to 85% reactor rated current, voltage regulator output voltage range will be determined by rectifier cabinet output current, then by rectification circuit, alternating voltage is converted to direct voltage, be applied on the winding of reactor to be heated, reactor winding is because straight resistance loss heating, insulate homogeneous heating to assigned temperature from inside by device body, again reactor is vacuumized and Circulation and Hot Oil Spray processing, take the moisture in insulation out of, reach dry effect.Voltmeter and ammeter are measured the voltage and current of reactor at any time, in the time not reaching test requirements document, regulate voltage regulator.When reactor loop current overrate 85% time, fuse action, cutoff circuit, protection reactor.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410311049.9A CN104036939A (en) | 2014-07-02 | 2014-07-02 | Direct-current heating drying method and direct-current heating device used for large electric reactor on site |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410311049.9A CN104036939A (en) | 2014-07-02 | 2014-07-02 | Direct-current heating drying method and direct-current heating device used for large electric reactor on site |
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| CN104036939A true CN104036939A (en) | 2014-09-10 |
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| CN201410311049.9A CN104036939A (en) | 2014-07-02 | 2014-07-02 | Direct-current heating drying method and direct-current heating device used for large electric reactor on site |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105225819A (en) * | 2015-11-06 | 2016-01-06 | 青海智鑫电力监理咨询有限公司 | A kind of transformer body heating means and application thereof |
| CN107424808A (en) * | 2017-08-19 | 2017-12-01 | 广东天圣高科股份有限公司 | A kind of roller type loop coil contact voltage regulator |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235180Y (en) * | 1995-08-21 | 1996-09-11 | 姚传江 | Automatic thermostatic drying device for inductance coil |
| CN1656578A (en) * | 2001-09-21 | 2005-08-17 | Abb技术公开股份有限公司 | DC voltage/current heating/gelling/curing of resin encapsulated distribution transformer coils |
| CN101710532A (en) * | 2009-12-07 | 2010-05-19 | 河南省电力公司南阳供电公司 | Method for drying transformer |
| CN101908404A (en) * | 2010-06-30 | 2010-12-08 | 国家电网公司 | Method and device for carrying out field drying on convertor transformer |
| CN101917124A (en) * | 2010-06-30 | 2010-12-15 | 国家电网公司 | Power supply device |
| CN202048756U (en) * | 2011-05-16 | 2011-11-23 | 汕头市新青罐机有限公司 | High frequency induction drying device |
| CN102868264A (en) * | 2012-09-17 | 2013-01-09 | 无锡航天万源新大力电机有限公司 | Stator winding hot-immersion and heating system and process |
| CN103874242A (en) * | 2014-03-19 | 2014-06-18 | 国家电网公司 | Large power transformer low-frequency heating device and achieving method |
| CN203910521U (en) * | 2014-07-02 | 2014-10-29 | 山东电力设备有限公司 | In-situ direct-current heating device for large electric reactor |
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2014
- 2014-07-02 CN CN201410311049.9A patent/CN104036939A/en not_active Application Discontinuation
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235180Y (en) * | 1995-08-21 | 1996-09-11 | 姚传江 | Automatic thermostatic drying device for inductance coil |
| CN1656578A (en) * | 2001-09-21 | 2005-08-17 | Abb技术公开股份有限公司 | DC voltage/current heating/gelling/curing of resin encapsulated distribution transformer coils |
| CN101710532A (en) * | 2009-12-07 | 2010-05-19 | 河南省电力公司南阳供电公司 | Method for drying transformer |
| CN101908404A (en) * | 2010-06-30 | 2010-12-08 | 国家电网公司 | Method and device for carrying out field drying on convertor transformer |
| CN101917124A (en) * | 2010-06-30 | 2010-12-15 | 国家电网公司 | Power supply device |
| CN202048756U (en) * | 2011-05-16 | 2011-11-23 | 汕头市新青罐机有限公司 | High frequency induction drying device |
| CN102868264A (en) * | 2012-09-17 | 2013-01-09 | 无锡航天万源新大力电机有限公司 | Stator winding hot-immersion and heating system and process |
| CN103874242A (en) * | 2014-03-19 | 2014-06-18 | 国家电网公司 | Large power transformer low-frequency heating device and achieving method |
| CN203910521U (en) * | 2014-07-02 | 2014-10-29 | 山东电力设备有限公司 | In-situ direct-current heating device for large electric reactor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105225819A (en) * | 2015-11-06 | 2016-01-06 | 青海智鑫电力监理咨询有限公司 | A kind of transformer body heating means and application thereof |
| CN107424808A (en) * | 2017-08-19 | 2017-12-01 | 广东天圣高科股份有限公司 | A kind of roller type loop coil contact voltage regulator |
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Application publication date: 20140910 |