CN113325209A - Design method of temporary sleeve outgoing line for transformer test - Google Patents
Design method of temporary sleeve outgoing line for transformer test Download PDFInfo
- Publication number
- CN113325209A CN113325209A CN202011389716.7A CN202011389716A CN113325209A CN 113325209 A CN113325209 A CN 113325209A CN 202011389716 A CN202011389716 A CN 202011389716A CN 113325209 A CN113325209 A CN 113325209A
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- CN
- China
- Prior art keywords
- transformer
- voltage
- temporary
- test
- sleeve
- Prior art date
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010079 rubber tapping Methods 0.000 claims abstract description 16
- 230000007935 neutral effect Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 abstract description 9
- 230000006698 induction Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
Abstract
The invention discloses a method for designing a temporary sleeve outgoing line for a transformer test, which comprises the following steps: s1: arranging a temporary sleeve on the oil tank cover of the transformer; s2: a lead is used for connecting the wiring board of the temporary sleeve with one contact of the transformer gas; s3: applying a test supply voltage between the temporary bushing and a neutral line terminal of the transformer; s4: and adjusting the tap switch to change the voltage of the test power supply. By changing the tapping position, the voltage between the temporary sleeve and the transformer neutral point sleeve can be flexibly selected, and the problems that the test power supply is directly applied to the low-voltage winding, the rated voltage of the low-voltage winding is single and cannot be adjusted, the power supply voltage requirement is high and the like are effectively solved. The device has the characteristics of simple design, flexible and convenient adjustment, high practicability, economy, high reliability and the like. The structure is mainly suitable for a single-phase high-capacity oil-immersed power transformer with a low-voltage winding with high rated voltage and a voltage-regulating winding designed at a high-voltage neutral point.
Description
Technical Field
The invention relates to a method for reducing the power supply voltage required to be applied during an induction voltage withstand test of a transformer, in particular to a method for designing a temporary bushing lead-out wire for a transformer test.
Background
In recent years, the electricity load in China is rapidly increased, the capacity and the output voltage of a single generator set are also improved, and the rated voltage of a low-voltage winding of a generator transformer connected with the generator set is also increased. Based on the situation, when the transformer is subjected to acceptance and preventive tests such as induction voltage resistance and no-load tests on the operation site, the requirement on the power supply voltage is high, the requirements on the types of test equipment for the transformer test are high, the requirements on performance parameters are strict, and the investment of the test equipment can be greatly improved. Due to the increase of the applied power supply voltage, the interference signal caused by the power supply is increased, which influences the analysis and judgment of the partial discharge test result of the transformer; sometimes even leading to the transformer being hoisted to inspect or returned to the factory for maintenance on site, which will cause a great deal of waste of manpower and social resources, and sometimes also cause the equipment commissioning or the maintenance cycle to be delayed, and a new technical scheme is to be sought for solving the problem.
Disclosure of Invention
The invention provides the design method of the temporary sleeve outgoing line for the transformer test, which has the advantages of simple design, flexible and convenient adjustment, high practicability, economy and reliability and capability of effectively reducing the voltage applied in the test.
The working principle of the invention is as follows: a design method of a temporary sleeve outgoing line for a transformer test comprises the following steps:
s1: arranging a temporary sleeve on the oil tank cover of the transformer;
s2: a lead is used for connecting the wiring board of the temporary sleeve with one contact of the transformer gas;
s3: applying a test supply voltage between the temporary bushing and a neutral line terminal of the transformer;
s4: and adjusting the tap switch to change the voltage of the test power supply.
Further, the method comprises the following steps: the temporary sleeve in the step S1 is connected with the flange of the tank cover of the transformer through the flange and the gasket by using a fastener.
Further, the method comprises the following steps: in the step S2, for a transformer with a tapping range of ± a × B%, the tapping contact is at a position of a/2; wherein A is the tapping stage number and B is the tapping stage difference.
Further, the method comprises the following steps: the test power supply voltage in the step S3 includes a transformer no-load test voltage and an induced withstand voltage test voltage.
The invention has the beneficial effects that: by changing the tapping position, the voltage between the temporary sleeve and the transformer neutral point sleeve can be flexibly selected, and the problems that the test power supply is directly applied to the low-voltage winding, the rated voltage of the low-voltage winding is single and cannot be adjusted, the power supply voltage requirement is high and the like are effectively solved. The device has the characteristics of simple design, flexible and convenient adjustment, high practicability, economy, high reliability and the like. The structure is mainly suitable for a single-phase high-capacity oil-immersed power transformer with a low-voltage winding with high rated voltage and a voltage-regulating winding designed at a high-voltage neutral point.
Drawings
FIG. 1 is a schematic view of the test apparatus assembly;
fig. 2 is a schematic wiring diagram of the experimental principle.
Labeled as: 1. a temporary sleeve; 11. a neutral point bushing; 2. a lead wire; 3. a wiring terminal; 7. a transformer tank; 71. a tap changer.
Detailed Description
For the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.
A design method of a temporary sleeve outgoing line for a transformer test comprises the following steps:
s1: a temporary sleeve 1 is arranged on a transformer oil tank cover;
s2: a lead is used for connecting the wiring board of the temporary sleeve 1 with one of the contact terminals in the transformer gas; for the transformer with the tapping range of +/-A multiplied by B%, the tapping contact connected with the temporary sleeve is at the position of A/2; wherein A is the tapping stage number and B is the tapping stage difference.
S3: applying a test supply voltage between the temporary bushing and a neutral line terminal of the transformer;
s4: and adjusting the tap switch to change the voltage of the test power supply.
In practical tests, the temporary sleeve 1 is connected with a flange of a transformer oil tank cover through a flange and a sealing gasket by using a fastener, then a wiring board of the temporary sleeve 1 is connected to a branch contact head of a transformer tapping switch 71 through a lead 2, when tests such as no-load and induction of a transformer are carried out, power voltage is applied between a line terminal of the temporary sleeve 1 and a line terminal of a neutral point of the transformer, the required applied power voltage can be flexibly changed by adjusting the tapping switch 71, and the practical value of reducing the test power voltage of the transformer is very important.
The above embodiments should not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent transformations fall within the protection scope of the present invention.
Claims (4)
1. A design method of a temporary sleeve outgoing line for a transformer test is characterized by comprising the following steps: the method comprises the following steps:
s1: arranging a temporary sleeve on the oil tank cover of the transformer;
s2: a lead is used for connecting the wiring board of the temporary sleeve with one contact of the transformer gas;
s3: applying a test supply voltage between the temporary bushing and a neutral line terminal of the transformer;
s4: and adjusting the tap switch to change the voltage of the test power supply.
2. The method for designing the temporary bushing lead-out wire for the transformer test according to claim 1, wherein the method comprises the following steps: the temporary sleeve in the step S1 is connected with the flange of the transformer tank cover through the flange and the sealing gasket by a fastener.
3. The method for designing the temporary bushing lead-out wire for the transformer test according to claim 1, wherein the method comprises the following steps: in the step S2, for a transformer with a tapping range of ± a × B%, the tapping contact is at a position of a/2; wherein A is the tapping stage number and B is the tapping stage difference.
4. The method for designing the temporary bushing lead-out wire for the transformer test according to claim 1, wherein the method comprises the following steps: the test power supply voltage in the step S3 includes a transformer no-load test voltage and an induced withstand voltage test voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389716.7A CN113325209A (en) | 2020-12-02 | 2020-12-02 | Design method of temporary sleeve outgoing line for transformer test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389716.7A CN113325209A (en) | 2020-12-02 | 2020-12-02 | Design method of temporary sleeve outgoing line for transformer test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113325209A true CN113325209A (en) | 2021-08-31 |
Family
ID=77413273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011389716.7A Pending CN113325209A (en) | 2020-12-02 | 2020-12-02 | Design method of temporary sleeve outgoing line for transformer test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113325209A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201004369Y (en) * | 2006-12-31 | 2008-01-09 | 西安西电变压器有限责任公司 | Voltage adjusting transformer |
| CN102543398A (en) * | 2010-12-24 | 2012-07-04 | 特变电工沈阳变压器集团有限公司 | Transformer for realizing voltage change through changeover of leads |
| CN203338928U (en) * | 2013-05-24 | 2013-12-11 | 中电电气(江苏)股份有限公司 | A transformer with a novel tap connection structure |
| CN104078218A (en) * | 2014-07-11 | 2014-10-01 | 江苏华鹏变压器有限公司 | Transformer test tapping method |
| CN106324444A (en) * | 2015-06-23 | 2017-01-11 | 中国电力科学研究院 | Transformer test platform |
| CN207868016U (en) * | 2018-03-15 | 2018-09-14 | 江西森田电力设备有限公司 | Stepped voltage regulation testing transformer |
| CN108666116A (en) * | 2018-06-23 | 2018-10-16 | 南通涵宇新能源电力工程有限公司 | The middle pressure pressure regulation method of power auto-transformer |
| CN208173389U (en) * | 2018-03-09 | 2018-11-30 | 特变电工沈阳变压器集团有限公司 | A kind of 3-phase autotransformer neutral lead structure |
| CN208690049U (en) * | 2018-07-18 | 2019-04-02 | 浙江纪元电气科技股份有限公司 | A kind of permanent magnetism on-load tap changer equipment of transformer |
| CN109786091A (en) * | 2019-03-28 | 2019-05-21 | 湖南德沃普电气股份有限公司 | Loaded capacity regulating voltage regulating transformer |
| CN111540592A (en) * | 2020-06-08 | 2020-08-14 | 保定天威保变电气股份有限公司 | 500kV single-phase on-load tap changing autotransformer with built-in compensation transformer |
-
2020
- 2020-12-02 CN CN202011389716.7A patent/CN113325209A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201004369Y (en) * | 2006-12-31 | 2008-01-09 | 西安西电变压器有限责任公司 | Voltage adjusting transformer |
| CN102543398A (en) * | 2010-12-24 | 2012-07-04 | 特变电工沈阳变压器集团有限公司 | Transformer for realizing voltage change through changeover of leads |
| CN203338928U (en) * | 2013-05-24 | 2013-12-11 | 中电电气(江苏)股份有限公司 | A transformer with a novel tap connection structure |
| CN104078218A (en) * | 2014-07-11 | 2014-10-01 | 江苏华鹏变压器有限公司 | Transformer test tapping method |
| CN106324444A (en) * | 2015-06-23 | 2017-01-11 | 中国电力科学研究院 | Transformer test platform |
| CN208173389U (en) * | 2018-03-09 | 2018-11-30 | 特变电工沈阳变压器集团有限公司 | A kind of 3-phase autotransformer neutral lead structure |
| CN207868016U (en) * | 2018-03-15 | 2018-09-14 | 江西森田电力设备有限公司 | Stepped voltage regulation testing transformer |
| CN108666116A (en) * | 2018-06-23 | 2018-10-16 | 南通涵宇新能源电力工程有限公司 | The middle pressure pressure regulation method of power auto-transformer |
| CN208690049U (en) * | 2018-07-18 | 2019-04-02 | 浙江纪元电气科技股份有限公司 | A kind of permanent magnetism on-load tap changer equipment of transformer |
| CN109786091A (en) * | 2019-03-28 | 2019-05-21 | 湖南德沃普电气股份有限公司 | Loaded capacity regulating voltage regulating transformer |
| CN111540592A (en) * | 2020-06-08 | 2020-08-14 | 保定天威保变电气股份有限公司 | 500kV single-phase on-load tap changing autotransformer with built-in compensation transformer |
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Application publication date: 20210831 |
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