CN201425876Y - Anti-interference intermediate transformer for partial discharge test of dry power transformer - Google Patents
Anti-interference intermediate transformer for partial discharge test of dry power transformer Download PDFInfo
- Publication number
- CN201425876Y CN201425876Y CN2009200711084U CN200920071108U CN201425876Y CN 201425876 Y CN201425876 Y CN 201425876Y CN 2009200711084 U CN2009200711084 U CN 2009200711084U CN 200920071108 U CN200920071108 U CN 200920071108U CN 201425876 Y CN201425876 Y CN 201425876Y
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- transformer
- winding
- discharge test
- interference
- dry
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Abstract
The utility model relates to an anti-interference intermediate transformer for the partial discharge test of a dry power transformer, comprising a first winding, a second winding and a separating layer. The separating layer is arranged between the first winding and the second winding. Compared with the prior art, the utility model has simple structure and easy use, and can decrease the test interference to an allowable range.
Description
Technical field
The utility model relates to intermediate transformer, particularly relates to the anti-interference intermediate transformer of a kind of dry-type power transformer partial portion's discharge test.
Background technology
In recent years, dry-type power transformer is widely adopted in electric power system and customer substation as novel electric power equipment.
The dry-type power transformer of solid insulation has advantages such as compact conformation, no greasy dirt, favourable fire prevention, but the often easier technological local defect of hiding of solid cast-type insulation, as pore and impurity is example etc., the partial discharge of these weak links may cause perfoliate dielectric breakdown and damage equipment produces fatal harm.
The partial discharge test is effective detection means of insulation local defect.Therefore, to solid insulation instrument transformer of 35kV etc., partial discharge test is already as the gainer in the field test.Yet the solid insulation power transformer then because of considering the restriction of experimental condition, is not carried out the field test of partial discharge in the past, judge transformer insulated local defect situation, be unfavorable in time finding and removing a hidden danger thereby can not detect fully and effectively.Must do when for this reason, Shanghai Power Company join to the 35kV dry-type transformer in the Q/SDJ1011-2004 of new promulgation " power equipment handing-over and preventive trial rules " local discharge to have done clearly stipulate (the 6.1st 17 sections).
But, present dry-type power transformer carries out partial discharge test at the scene and does not also satisfy the requirements, reason: 1) transformer in many transformer stations is installed in floor or subterranean layer, and existing local discharge test device and power supply equipment are very huge, can't reach the testing ground; 2) site environment is poor, interference is big.
Because field condition is limit, be the three-phase intermediate frequency generator that the operating weight volume is not bigger, use on-the-spot construction power supply test can only adopt single-phase pressurization, through intermediate transformer test specimen is applied test voltage by supply unit, but present intermediate transformer can not effective isolation be constructed power supply for the interference of testing.
Summary of the invention
Technical problem to be solved in the utility model is exactly to provide a kind of dry-type power transformer partial portion's discharge test anti-interference intermediate transformer for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions: the anti-interference intermediate transformer of dry-type power transformer partial portion discharge test, comprise first winding and second winding, it is characterized in that, also comprise separator, described separator is located between first winding and second winding.
Described separator is a copper foil, an end ground connection of this copper foil.
The utility model also comprises a filter reactance, and this reactance links to each other with the input of first winding.
Compared with prior art, the utility model is simple in structure, easy to use, and the test interference can be reduced in the scope of permission.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1,
The anti-interference intermediate transformer of dry-type power transformer partial portion discharge test comprises the first winding I and the second winding II, it is characterized in that, also comprises separator III, and described separator III is located between the first winding I and the second winding II.
Described separator III is a copper foil, an end ground connection of this copper foil; The utility model also comprises a filter reactance R, and this reactance R links to each other with the input of the first winding I.
For effectively isolating the interference of construction power supply for test, the utility model increases screen between the high and low pressure coil of intermediate transformer (usefulness of boosting), can suppress to conduct to the high-pressure side from the interference of variable frequency power supply.
Insert a reactance at the intermediate transformer high-voltage output end, high-frequency interferencing signal is played inhibitory action,, variable frequency power supply is shielded if the high-pressure side flashover takes place or puncture to produce the high-frequency sasser invasion in process of the test.
Claims (3)
1. the anti-interference intermediate transformer of dry-type power transformer partial portion discharge test comprises first winding and second winding, it is characterized in that, also comprises separator, and described separator is located between first winding and second winding.
2. the anti-interference intermediate transformer of dry-type power transformer partial portion's discharge test according to claim 1 is characterized in that described separator is a copper foil, an end ground connection of this copper foil.
3. the anti-interference intermediate transformer of dry-type power transformer partial portion's discharge test according to claim 1 and 2 is characterized in that also comprise a filter reactance, this reactance links to each other with the input of first winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200711084U CN201425876Y (en) | 2009-04-24 | 2009-04-24 | Anti-interference intermediate transformer for partial discharge test of dry power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200711084U CN201425876Y (en) | 2009-04-24 | 2009-04-24 | Anti-interference intermediate transformer for partial discharge test of dry power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201425876Y true CN201425876Y (en) | 2010-03-17 |
Family
ID=42025331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200711084U Expired - Fee Related CN201425876Y (en) | 2009-04-24 | 2009-04-24 | Anti-interference intermediate transformer for partial discharge test of dry power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201425876Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505470A (en) * | 2020-06-19 | 2020-08-07 | 国网北京市电力公司 | High-power supply filter in partial discharge test |
-
2009
- 2009-04-24 CN CN2009200711084U patent/CN201425876Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111505470A (en) * | 2020-06-19 | 2020-08-07 | 国网北京市电力公司 | High-power supply filter in partial discharge test |
| CN111505470B (en) * | 2020-06-19 | 2022-03-01 | 国网北京市电力公司 | High-power supply filter in partial discharge test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI JIULONG ELECTRIC POWER (GROUP) CO., LTD. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110526 Address after: 407 No. 200040, Lane 1394, Zhongxing Road, Shanghai, room 3 Co-patentee after: Shanghai Jiulong Electric Power (Group) Co., Ltd. Patentee after: Shanghai Jiulong electric equipment experiment Co., Ltd. Address before: 407 No. 200040, Lane 1394, Zhongxing Road, Shanghai, room 3 Patentee before: Shanghai Jiulong electric equipment experiment Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100317 Termination date: 20140424 |