CN108732476A - A kind of local discharge test system with anti-interference transformer - Google Patents
A kind of local discharge test system with anti-interference transformer Download PDFInfo
- Publication number
- CN108732476A CN108732476A CN201810734635.2A CN201810734635A CN108732476A CN 108732476 A CN108732476 A CN 108732476A CN 201810734635 A CN201810734635 A CN 201810734635A CN 108732476 A CN108732476 A CN 108732476A
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- CN
- China
- Prior art keywords
- winding
- transformer
- interference
- test
- phase
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- 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
- H01F27/2847—Sheets; Strips
-
- 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
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- 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
- H01F27/2847—Sheets; Strips
- H01F2027/2857—Coil formed from wound foil conductor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention relates to high voltage electric equipment manufacturing technology field, especially a kind of dry-type distribution transformer manufacture partial discharge test system, including three phase mains, generator, anti-interference transformer, test transformer, partial discharge testing system.Anti-interference transformer, first winding are outer winding, and secondary winding is interior winding, with two winding concentric locking collar of phase on iron core rod；First winding, secondary winding are all copper foil coiling, presoak cloth using F grades of DMD epoxy resin, form a high-strength armoured body after hot setting；First winding uses delta connection, secondary winding to use star connection；Present invention has the advantages that：Reduce the background value of local discharge test, anti-interference transformer need not increase that shielded layer, small, manufacturing cost is low.
Description
Technical field
The present invention relates to the manufacture shelf depreciations that high voltage electric equipment manufactures experimental technique field, especially dry-type transformer
Experiment.
Background technology
With the continuous development of city industrialization, electric network pollution getting worse, domestic many transformer manufacturers are dry in production
During formula transformer, product is frequently encountered when carrying out local discharge test, finds the environmental disturbances value that partial discharge testing system measures
Much larger than 10PC, and requirements of the national standard dry-type transformer partial discharge value is necessarily less than 10PC hereinafter, so, in such environment item
Under part, partial discharge of dry-type transformer can not be carried out and measure examination.
In order to solve the problems, such as that local discharge test environmental disturbances value is big, most transformer manufacturers selections make private mask experiment
The method of room eliminates environmental disturbances, but it is such the result is that it is of high cost, efficiency is low；Also some transformers producer then selects
Commercial power low ebb carries out local discharge test, but efficiency is low, effect is undesirable.
Currently, number of patent application is CN201510589614.2, a kind of partial discharge of dry-type transformer experiment use is disclosed
Inhibit the isolating transformer of power supply disturbance.The patent is to inhibiting power supply disturbance to play certain effect, but it has the following problems：
1, between iron core and low pressure winding, between low pressure winding and high-voltage winding, all add shielded layer, this undoubtedly increase every
Structure size from transformer, improves cost of manufacture, also increases the manufacture difficulty of isolating transformer；
2, it has been investigated that, which becomes shielded layer must be grounded during the test, when transformer manufacturers experiment station grounded screen
Due to outmoded earthing effect it is bad when, can make instead because of shielding layer grounding the interference of experiment station's generator pass through shielded layer into
Enter to partial discharge testing system, causes the environmental disturbances value that partial discharge testing system measures undesirable.
Invention content
The technical problem to be solved by the present invention is to, provide it is a kind of it is simple in structure, consumptive material is few, band efficient, at low cost is anti-
The local discharge test system of interference transformer.
To achieve the goals above, the specific technical solution of the present invention is：A kind of local discharge test with anti-interference transformer
System, including three phase mains, generator, anti-interference transformer, test transformer, partial discharge testing system；Three phase mains and power generation
Machine connects, and power supply is provided for generator；Anti-interference transformer primary side is connect with generator output end, and anti-interference transformer is secondary
The low-pressure side of side and test transformer connects；The high-pressure side of test transformer is connect with partial discharge testing system；Partial discharge testing system
Including signal sampling device, Amplifier And Computer, signal sampling device is connect with test transformer high-pressure side, and amplifier is to letter
The signal that number sampling apparatus obtains amplify and is sent to computer, and computer passes through the analysis of partial discharge test software, judges to test transformation
The shelf depreciation value of device.
Anti-interference transformer, including three-phase three-column core type iron core, three-phase first winding, three-phase secondary winding；First winding
For outer winding, secondary winding is interior winding, with two winding concentric locking collar of phase on iron core rod；First winding, secondary winding are all
Copper foil coiling, inside and outside insulation and layer insulation are all used F grades of DMD epoxy resin to presoak cloth, lift one's head and drawn using copper bar,
Winding forms a high-strength armoured body after being directly over hot setting；First winding uses delta connection, secondary winding to use
Star connection；First winding rated voltage matches with generator output voltage, and it is low that secondary winding rated voltage should be greater than test product
Voltage side voltage；To increase trial stretch, secondary winding can draw two voltages and lift one's head on demand；Capacity need to meet test product induction
Capacity requirement when experiment；Rated frequency is 50Hz；Short-circuit impedance 4%.
After anti-interference transformer of the present invention, have the advantages that：
1. structure is very simple, easily designed；
2. it is small, consumptive material is few, it is at low cost；
3. because first and second all uses Foil winding, voltage between layers is low, therefore partial discharge value very little itself；
4. weakening local discharge test environmental disturbances value up to 40 times or so, meet most transformer manufacturers local discharge test requirements.
Description of the drawings
Fig. 1 is local discharge test system schematic of the present invention.
Reference sign：1, generator, 2, anti-interference transformer, 3, test transformer, 4 partial discharge testing systems.
Specific implementation mode
Present invention is further described in detail below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of local discharge test system with anti-interference transformer, including three phase mains, generator 1, anti-interference change
Depressor 2, test transformer 3, partial discharge testing system 4；Three phase mains is connect with generator 1, and power supply is provided for generator 1；It is anti-dry
It disturbs 2 primary side of transformer to connect with 1 output end of generator, 2 secondary side of anti-interference transformer and the low-pressure side of test transformer 3 connect
It connects；The high-pressure side of test transformer 3 is connect with partial discharge testing system 4；Partial discharge testing system 4 includes signal sampling device, amplification
Device and computer, signal sampling device are connect with test transformer high-pressure side, the signal that amplifier obtains signal sampling device
Amplify and be sent to computer, the shelf depreciation value of test transformer is analyzed by partial discharge test software, judged to computer.
Anti-interference transformer 2, including three-phase three-column core type iron core, three-phase first winding, three-phase secondary winding；First winding
For outer winding, secondary winding is interior winding, with two winding concentric locking collar of phase on iron core rod；First winding, secondary winding are all
Copper foil coiling, inside and outside insulation and layer insulation are all used F grades of DMD epoxy resin to presoak cloth, lift one's head and drawn using copper bar,
Winding forms a high-strength armoured body after being directly over hot setting；First winding uses delta connection, secondary winding to use
Star connection.Anti-interference transformer is simple in structure, small, consumptive material is few, at low cost.
After tested, when anti-interference transformer is not used, the environmental disturbances value that partial discharge testing system measures is typically up to 300PC
Left and right is much larger than the level of 10PC, so can not carry out the local discharge test of dry-type transformer at all.
After anti-interference transformer being sealed between generating set 1 and test transformer 3, the environmental disturbances value of aforementioned 300PC,
It will be weakened to 10PC levels below, and meet the requirement for carrying out dry-type transformer local discharge test.
Its further technical solution is, when test product low-pressure side voltage is higher（Such as 10kV）, the anti-interference transformer of the present invention
When secondary side voltage can not match, an anti-interference transformer can be sealed between anti-interference transformer 2 and test transformer 3.
After applying the present invention, test system shelf depreciation value background value is reduced to 10pC hereinafter, meeting the requirement of experiment.
The anti-interference transformer of the present invention, simple in structure, small, primary side and secondary side need not increase shielded layer.
Claims (3)
1. a kind of local discharge test system with anti-interference transformer, including three phase mains, generator（1）, anti-interference transformer
（2）, test transformer（3）, partial discharge testing system（4）, it is characterised in that：Three phase mains and generator（1）Connection, anti-interference change
Depressor（2）Primary side and generator（1）Output end connects, anti-interference transformer（2）Secondary side and test transformer（3）Low pressure
Side connects, test transformer（3）High-pressure side and partial discharge testing system（4）Connection；Partial discharge testing system（4）Including signal sampling
Device, Amplifier And Computer, signal sampling device are connect with test transformer high-pressure side, and amplifier obtains signal sampling device
The signal taken amplifies and is sent to computer, and the shelf depreciation of test transformer is analyzed by partial discharge test software, judged to computer
Value.
2. the local discharge test system with anti-interference transformer as described in claim 1, it is characterised in that：Anti-interference transformer（2）,
Including three-phase three-column core type iron core, three-phase first winding, three-phase secondary winding；First winding is outer winding, and secondary winding is interior
Winding, with two winding concentric locking collar of phase on iron core rod；First winding, secondary winding are all copper foil coiling, it is inside and outside insulation with
And layer insulation all uses F grades of DMD epoxy resin to presoak cloth, lifts one's head and is drawn using copper bar, after winding is directly over hot setting
Form a high-strength armoured body；First winding uses delta connection, secondary winding to use star connection.
3. the local discharge test system with anti-interference transformer as claimed in claim 2, it is characterised in that：Anti-interference transformer（2）
Secondary winding lift one's head there are two voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734635.2A CN108732476A (en) | 2018-07-06 | 2018-07-06 | A kind of local discharge test system with anti-interference transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734635.2A CN108732476A (en) | 2018-07-06 | 2018-07-06 | A kind of local discharge test system with anti-interference transformer |
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| Publication Number | Publication Date |
|---|---|
| CN108732476A true CN108732476A (en) | 2018-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810734635.2A Pending CN108732476A (en) | 2018-07-06 | 2018-07-06 | A kind of local discharge test system with anti-interference transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280433A (en) * | 2021-12-02 | 2022-04-05 | 西南交通大学 | Transformer bushing partial discharge risk assessment method based on amplification circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201812643U (en) * | 2010-04-26 | 2011-04-27 | 卧龙电气集团股份有限公司 | Dry-type transformer for testing wind-driven generator |
| CN105097252A (en) * | 2015-09-16 | 2015-11-25 | 浙江江山变压器股份有限公司 | Isolation transformer capable of suppressing power interference for partial discharge test of dry-type transformer |
| CN105304291A (en) * | 2014-07-18 | 2016-02-03 | 扬州华鼎电器有限公司 | Foil winding dry type transformer and production method thereof |
-
2018
- 2018-07-06 CN CN201810734635.2A patent/CN108732476A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201812643U (en) * | 2010-04-26 | 2011-04-27 | 卧龙电气集团股份有限公司 | Dry-type transformer for testing wind-driven generator |
| CN105304291A (en) * | 2014-07-18 | 2016-02-03 | 扬州华鼎电器有限公司 | Foil winding dry type transformer and production method thereof |
| CN105097252A (en) * | 2015-09-16 | 2015-11-25 | 浙江江山变压器股份有限公司 | Isolation transformer capable of suppressing power interference for partial discharge test of dry-type transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280433A (en) * | 2021-12-02 | 2022-04-05 | 西南交通大学 | Transformer bushing partial discharge risk assessment method based on amplification circuit |
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