CN204029564U - Converter transformer and field drying treatment facility - Google Patents
Converter transformer and field drying treatment facility Download PDFInfo
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- CN204029564U CN204029564U CN201420333805.3U CN201420333805U CN204029564U CN 204029564 U CN204029564 U CN 204029564U CN 201420333805 U CN201420333805 U CN 201420333805U CN 204029564 U CN204029564 U CN 204029564U
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- 238000001035 drying Methods 0.000 title claims abstract description 31
- 238000004804 winding Methods 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims description 37
- 239000007921 spray Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000001556 precipitation Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000003672 processing method Methods 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 238000009413 insulation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 230000002085 persistent effect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000007872 degassing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000004457 water analysis Methods 0.000 description 1
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Abstract
The utility model discloses converter transformer and field drying treatment facility, converter transformer, it comprises converter transformer body, source side winding and valve side winding is provided with in described converter transformer body, transformer oil is filled with at converter transformer body and between source side winding and valve side winding, described converter transformer body is provided with the conservator for extracting transformer oil out, and described conservator is positioned at the top of converter transformer body.Can ensure that the moisture in transformer oil and insulating part assembly is discharged in time; before guaranteeing that converter transformer puts into operation; Water in oil amount meets the requirements; insulating resistance value meets regulatory requirements, ensure to there will not be the excessive precipitation of moisture when converter transformer runs and affect transformer run situation.
Description
Technical field
The utility model relates to transformer technology field, particularly a kind of converter transformer and field drying treatment facility.
Background technology
At present, for the installation of domestic high-power transformer particularly converter transformer, Oil feeding process and oil-filled after field drying process all there is no the process of complete set.But converter transformer may bring the moisture in air in sleeve pipe installation process, and moisture is discharged in not having reliable drying step by transformer oil after oil-filled and in insulation assembly.And important high-power transformer installs the rear Circulation and Hot Oil Spray technological measure that only can carry out certain hour, and transformer does not take drying step just to be put into operation by transformer after oil test is qualified, this cannot be avoided treating that operating transformer exists the risk of making moist, and then cause transformer to occur internal discharge in debugging or running, or even insulation breakdown.
Particularly the converter transformer of large-sized DC power transmission engineering has the advantages that power is large, voltage is high, operating condition is complicated, has very strict requirement to the moisture of transformer oil (i.e. transformer insulation oil) and insulation assembly.Therefore, study a set of for the reliable and practical of converter transformer and the dry treatment process method being easy to execute-in-place be necessary very much.
Utility model content
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is to provide a kind of converter transformer and field drying treatment facility, causes insulation damages after avoiding converter transformer to install because making moist.
In order to achieve the above object, the utility model takes following technical scheme:
A kind of converter transformer, it comprises converter transformer body, source side winding and valve side winding is provided with in described converter transformer body, transformer oil is filled with at converter transformer body and between source side winding and valve side winding, described converter transformer body is provided with the conservator for extracting transformer oil out, and described conservator is positioned at the top of converter transformer body.
In described converter transformer, described converter transformer body is provided with pouring orifice and oil-out, described pouring orifice and oil-out are in the diagonal position of converter transformer body, and described pouring orifice is positioned at the bottom of converter transformer body, and oil-out is positioned at the top of mailbox.
In described converter transformer, the lead-in wire of described source side winding is provided with the first sleeve pipe, the lead-in wire of described valve side winding is provided with the second sleeve pipe.
A field drying processing method for above-mentioned converter transformer, it comprises:
A, converter transformer complete auxiliary install after, 120 hours are vacuumized to converter transformer body;
B, in converter transformer body, carry out vacuum oil 24 hours, make to be full of transformer oil in converter transformer body;
C, employing hot oil circulating device carry out Circulation and Hot Oil Spray process at least 24 hours to described converter transformer body;
D, enter ultralow frequency big current heater at source side winding side joint, and by valve side short circuit in winding, make temperature of oil in transformer reach 60 ~ 70 DEG C of persistent loop 24 hours by short-circuit method heating oil temperature;
E, remove described ultralow frequency big current heater, proceed Circulation and Hot Oil Spray process 36 hours, make temperature of oil in transformer more than 50 DEG C;
F, remove hot oil circulating device, make that converter transformer body is quiet puts 120 hours.
In described field drying processing method, described steps A also comprises: before vacuumizing timing, carries out leak rate test, and guarantee that vacuum degree is within 100Pa, leak rate is within 30Pa.
In described field drying processing method, in stepb, the oil injecting speed of vacuum oil is 4t/h-6t/h.
In described field drying processing method, described step C specifically comprises:
C1, employing hot oil circulating device carry out Circulation and Hot Oil Spray process to described converter transformer body;
C2, start timing when temperature of oil in transformer reaches 50 DEG C, and continue Circulation and Hot Oil Spray 24 hours.
In described field drying processing method, the electric current that described ultralow frequency big current heater exports is 700-800A, and power frequency is 0.08-0.1Hz.
In described field drying processing method, in step C or D or E, after oil temperature reaches 50 DEG C, carried out megger test and the puncture voltage test of converter transformer body every 12 hours, and get transformer oil sample testing moisture content.
For the field drying treatment facility to above-mentioned converter transformer, it is characterized in that, comprising:
Vacuum extractor, for vacuumizing process to converter transformer body, described vacuum extractor connects the conservator of converter transformer;
Hot oil circulating device, for when vacuum extractor vacuumizes, flow into transformer oil to converter transformer body, and Circulation and Hot Oil Spray heat treated is carried out to described converter transformer body, one oil pipe line of described hot oil circulating device connects described pouring orifice, and another oil pipe line connects described oil-out;
Ultralow frequency big current heater, heats described transformer oil for exporting ultralow frequency big current, and described ultralow frequency big current heater connects the lead-in wire of source side winding, and during the work of ultralow frequency big current heater, adopts shorting stub by valve side winding short circuit;
Timer, for the operating time timing to vacuum extractor, hot oil circulating device and ultralow frequency big current heater.
Compared to prior art, the converter transformer that the utility model provides and field drying processing method thereof and field drying treatment facility, the process of certain hour Circulation and Hot Oil Spray is carried out after oiling in converter transformer body, big current heating deep fat circular treatment, then carry out the Circulation and Hot Oil Spray of a period of time again, can ensure that the moisture in transformer oil and insulating part assembly is discharged in time, before guaranteeing that converter transformer puts into operation, Water in oil amount meets the requirements, insulating resistance value meets regulatory requirements, ensure to there will not be the excessive precipitation of moisture when converter transformer runs and affect transformer run situation.And the control of oil temperature avoid transformer oil go bad, transformer oil and then still can use, because treatment measures are only carried out after fixing link, do not affect the installment work of converter transformer, cost and the control of time there is very large advantage, and does not introduce other any risk affecting change of current change and run.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model converter transformer.
Fig. 2 is the flow chart of the field drying processing method of the utility model converter transformer.
Fig. 3 is schematic diagram when carrying out vacuum oil in the field drying processing method of the utility model converter transformer.
Fig. 4 is schematic diagram when carrying out Circulation and Hot Oil Spray process in the field drying processing method of the utility model converter transformer.
Fig. 5 is schematic diagram when carrying out ultralow frequency big current heat treated in the field drying processing method of the utility model converter transformer.
Embodiment
The utility model provides a kind of converter transformer and field drying processing method thereof and field drying treatment facility, to relate in converter transformer Oil feeding process and oil-filled after insulating oil and the dry treatment process of intraware, this technique can discharge the moisture that converter transformer invades in installation process, ensure outside moisture to be brought in insulating oil in Oil feeding process, and there is the function reducing water content in insulating oil, separate out moisture in insulating part.
For making the purpose of this utility model, technical scheme and effect clearly, clearly, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, it is the structured flowchart of the utility model converter transformer.As shown in Figure 1, converter transformer of the present utility model comprises converter transformer body 10, source side winding (visual angle of Fig. 1 is not shown) and valve side winding (visual angle of Fig. 1 is not shown) is provided with in described converter transformer body 10, at converter transformer body 10 and be filled with transformer oil (visual angle of Fig. 1 is not shown) between source side winding and valve side winding, described converter transformer body 10 is provided with the conservator 20 for extracting transformer oil out, and described conservator 20 is positioned at the top of converter transformer body 10.
Wherein, described converter transformer body 10 is provided with pouring orifice 101 and oil-out 102, described pouring orifice 101 and oil-out 102 are in the diagonal position of converter transformer body 10, and described pouring orifice 101 is positioned at the bottom of converter transformer body 10, and oil-out 102 is positioned at the top of mailbox.Rectangular for the front of converter transformer body 10, described pouring orifice 101 can be positioned at the lower right corner (or lower left corner) position of converter transformer body 10, described oil-out 102 can be positioned at the lower left corner (or lower right corner) position of converter transformer body 10, be that line of symmetry distributes with diagonal, make following when carrying out Circulation and Hot Oil Spray process, transformer oil flows into from the bottom of converter transformer body 10, extract out from top and carry out heating hot oil circulating device, make transformer oil homogeneous heating.
Please again consult Fig. 1, the lead-in wire of described source side winding is provided with the first sleeve pipe 103, the lead-in wire of described valve side winding is provided with the second sleeve pipe 104, for the protection of the lead-in wire of source side winding and valve side winding.
The utility model is also corresponding provides a kind of field drying processing method for carrying out field drying to above-mentioned converter transformer, and refer to Fig. 2, it comprises the following steps:
S100, converter transformer complete auxiliary install after, 120 hours are vacuumized to converter transformer body;
S200, in converter transformer body, carry out vacuum oil 24 hours, make to be full of transformer oil in converter transformer body;
S300, employing hot oil circulating device carry out Circulation and Hot Oil Spray process at least 24 hours to described converter transformer body;
S400, enter ultralow frequency big current heater at source side winding side joint, and by valve side short circuit in winding, make temperature of oil in transformer reach 60 ~ 70 DEG C of persistent loop 24 hours by short-circuit method heating oil temperature;
S500, remove described ultralow frequency big current heater, proceed Circulation and Hot Oil Spray process 36 hours, make temperature of oil in transformer more than 50 DEG C;
S600, remove hot oil circulating device, make that converter transformer body is quiet puts 120 hours.
The field drying processing method of the converter transformer that the utility model provides, oiling whole process can ensure that not having moisture enters into inside transformer, guarantee converter transformer put into operation before Water in oil amount meet the requirements, insulating resistance value meets regulatory requirements.And the control of the utility model to oil temperature avoids the rotten of insulating oil (i.e. transformer oil), insulating oil and then still can use.In addition, field drying processing method of the present utility model is only carried out after fixing link, do not affect the installment work of converter transformer, cost and the control of time there is very large advantage, and do not introduce any of other and affect the risk that the change of current becomes operation, ensure that the safe and stable operation of converter transformer.
Wherein, in the step s 100, before vacuumizing timing, carry out leak rate test, guarantee that vacuum degree is within 100Pa, leak rate is within 30Pa.As shown in Figure 3, the pipeline of vacuum extractor is connected to conservator top, continues to vacuumize until oiling terminates after completing transformer installation.In the process vacuumized, the test of leak rate be carried out, first converter transformer is evacuated to about 100Pa, then stop vacuumizing, the little rear reading MaLeod gauge value P1 of 1h, reads MaLeod gauge value P2 after crossing 30min, as residual voltage increment P2-P1≤30Pa, namely think that leak rate is qualified.Start timing afterwards, and maintenance vacuumizes 120 hours.
Then, while vacuumizing, adopt hot oil circulating device (as vacuum oil-filter) in converter transformer body, to inject qualified transformer oil with the speed of 4-6t per hour, and continue 24 hours, be as the criterion with actual filling time.
After filling oil, adopt hot oil circulating device to carry out Circulation and Hot Oil Spray process to described converter transformer body, and start timing when upper strata oil temperature reaches 50 DEG C, and continue Circulation and Hot Oil Spray 24 hours.Refer to Fig. 4, when hot oil circulating device carries out Circulation and Hot Oil Spray process to converter transformer body, two of hot oil circulating device pipelines are connected pouring orifice and oil-out, ensure that the oily flow path direction of converter transformer body is the mode (flow direction of oil as shown by the arrows in figure 4) of bottom in and top out, make the oily homogeneous heating of converter transformer body.
In the present embodiment, because pouring orifice and the oil-out position diagonal along converter transformer body is symmetric, therefore in circulating-heating processing procedure, also can opens oil filter degassing tank and carry out degassed process.During Circulation and Hot Oil Spray, when the oil temperature of described oil-out is progressively warming up to 50 DEG C, starts timing and heat 24 hours.
Afterwards, adopt ultralow frequency big current heater access source side winding side, and by valve side short circuit in winding, as shown in Figure 5, the electric current that described ultralow frequency big current heater output current frequency is 0.08-0.1Hz, size of current is 700-800A carries out big current heating, oil temperature is made to reach 60 ~ 70 DEG C, and persistent loop 24 hours.In this enforcement, the size of ultralow frequency big current heater output current specifically should depending on the oil temperature efficiency of heating surface, and object is that oil temperature is climbed between 60 DEG C ~ 70 DEG C, but should more than 70 DEG C.The utility model adopts ultralow frequency big current to heat, and can reduce the induction reactance of converter transformer, thus reduces hot oil circulating device output voltage and power loss.
After big current heating, remove ultralow frequency big current heater and proceed Circulation and Hot Oil Spray process 36 hours, ensure that the intrinsic oil temperature of converter transformer is more than 50 DEG C, this step, also known as strengthening process, confirms that the moisture in transformer oil meets the demands.
Further, carry out Circulation and Hot Oil Spray process, ultralow frequency big current heat treated and again Circulation and Hot Oil Spray process time, after oil temperature reaches 50 DEG C, megger test and the puncture voltage test of converter transformer body main insulation need be carried out every 12 hours, and get transformer oil sample testing moisture content, ensure that insulating resistance value meets the demands, water content is lasting and reduce and keep stable; Complete Circulation and Hot Oil Spray treatment process afterwards, enter and quietly put the stage, relevant commissioning test work can be carried out after the quiet 120h of putting.
The utility model adopts the mode of Circulation and Hot Oil Spray process, ultralow frequency big current heat treated and Circulation and Hot Oil Spray process again; because hot oil circulating device has the effect of condensed moisture to guarantee, the moisture that converter transformer invades in installation process is discharged; Circulation and Hot Oil Spray under long-time high temperature can by the water analysis of converter transformer inside insulation out, ensure operationally there will not be the excessive precipitation of moisture at converter transformer and affect the situation of transformer operation.
Based on above-mentioned converter transformer and its field drying processing method, the utility model also provides a kind of field drying treatment facility, and it comprises: vacuum extractor, hot oil circulating device, ultralow frequency big current heater and timer.
Described vacuum extractor connects the conservator of converter transformer, for vacuumizing process to converter transformer body.
One oil pipe line of described hot oil circulating device connects described pouring orifice, another oil pipe line connects described oil-out, for when vacuum extractor vacuumizes, flow into transformer oil to converter transformer body, and Circulation and Hot Oil Spray heat treated is carried out to described converter transformer body.
Described ultralow frequency big current heater connects the lead-in wire of source side winding, and during the work of ultralow frequency big current heater, adopting shorting stub by valve side winding short circuit, heating described transformer oil for exporting ultralow frequency big current.
Described timer, for the operating time timing to vacuum extractor, hot oil circulating device and ultralow frequency big current heater.
Further, described field drying treatment facility also comprises oil filter degassing tank, for carrying out degassed process in Circulation and Hot Oil Spray process.
In sum; the utility model carries out the process of certain hour Circulation and Hot Oil Spray, big current heating deep fat circular treatment in converter transformer body after oiling; then carry out the Circulation and Hot Oil Spray of a period of time again; can ensure that the moisture in transformer oil and insulating part assembly is discharged in time; before guaranteeing that converter transformer puts into operation; Water in oil amount meets the requirements; insulating resistance value meets regulatory requirements, ensure to there will not be the excessive precipitation of moisture when converter transformer runs and affect transformer run situation.And the control of oil temperature avoid transformer oil go bad, transformer oil and then still can use, because treatment measures are only carried out after fixing link, do not affect the installment work of converter transformer, cost and the control of time there is very large advantage, and does not introduce other any risk affecting change of current change and run.
Be understandable that; for those of ordinary skills; can be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the utility model.
Claims (4)
1. a converter transformer, it is characterized in that, comprise converter transformer body, source side winding and valve side winding is provided with in described converter transformer body, transformer oil is filled with at converter transformer body and between source side winding and valve side winding, described converter transformer body is provided with the conservator for extracting transformer oil out, and described conservator is positioned at the top of converter transformer body.
2. converter transformer according to claim 1, it is characterized in that, described converter transformer body is provided with pouring orifice and oil-out, described pouring orifice and oil-out are in the diagonal position of converter transformer body, described pouring orifice is positioned at the bottom of converter transformer body, and oil-out is positioned at the top of mailbox.
3. converter transformer according to claim 1, is characterized in that, the lead-in wire of described source side winding is provided with the first sleeve pipe, and the lead-in wire of described valve side winding is provided with the second sleeve pipe.
4., for the field drying treatment facility to the converter transformer described in claims 1 to 3 any one, it is characterized in that, comprising:
Vacuum extractor, for vacuumizing process to converter transformer body, described vacuum extractor connects the conservator of converter transformer;
Hot oil circulating device, for when vacuum extractor vacuumizes, flow into transformer oil to converter transformer body, and Circulation and Hot Oil Spray heat treated is carried out to described converter transformer body, one oil pipe line of described hot oil circulating device connects described pouring orifice, and another oil pipe line connects described oil-out;
Ultralow frequency big current heater, heats described transformer oil for exporting ultralow frequency big current, and described ultralow frequency big current heater connects the lead-in wire of source side winding, and during the work of ultralow frequency big current heater, adopts shorting stub by valve side winding short circuit;
Timer, for the operating time timing to vacuum extractor, hot oil circulating device and ultralow frequency big current heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420333805.3U CN204029564U (en) | 2014-06-20 | 2014-06-20 | Converter transformer and field drying treatment facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420333805.3U CN204029564U (en) | 2014-06-20 | 2014-06-20 | Converter transformer and field drying treatment facility |
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| Publication Number | Publication Date |
|---|---|
| CN204029564U true CN204029564U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420333805.3U Expired - Lifetime CN204029564U (en) | 2014-06-20 | 2014-06-20 | Converter transformer and field drying treatment facility |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104103409A (en) * | 2014-06-20 | 2014-10-15 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Converter transformer as well as site drying processing method and site drying processing equipment of converter transformer |
| CN109524198A (en) * | 2018-12-18 | 2019-03-26 | 中国能源建设集团安徽电力建设第二工程有限公司 | A kind of transformer installation method |
-
2014
- 2014-06-20 CN CN201420333805.3U patent/CN204029564U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104103409A (en) * | 2014-06-20 | 2014-10-15 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Converter transformer as well as site drying processing method and site drying processing equipment of converter transformer |
| CN104103409B (en) * | 2014-06-20 | 2016-08-17 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | The field drying processing method of converter power transformer |
| CN109524198A (en) * | 2018-12-18 | 2019-03-26 | 中国能源建设集团安徽电力建设第二工程有限公司 | A kind of transformer installation method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141217 |