CN106291296B - A kind of partial discharge of transformer defects simulation device and method - Google Patents
A kind of partial discharge of transformer defects simulation device and method Download PDFInfo
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- CN106291296B CN106291296B CN201610865900.1A CN201610865900A CN106291296B CN 106291296 B CN106291296 B CN 106291296B CN 201610865900 A CN201610865900 A CN 201610865900A CN 106291296 B CN106291296 B CN 106291296B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000007547 defect Effects 0.000 title claims abstract description 14
- 238000004088 simulation Methods 0.000 title claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 20
- 230000033228 biological regulation Effects 0.000 claims abstract description 16
- 238000001228 spectrum Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 210000004899 c-terminal region Anatomy 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 125000003396 thiol group Chemical class [H]S* 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- 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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of partial discharge of transformer defects simulation device and method, which includes power transformer, pressure regulator and implantable discharge source；Wherein, pressure regulator is connected with the power transformer with implantable discharge source；The two ends of the power transformer mesolow winding coil disconnect, and the ends x, the ends y and the ends z that tail end is arranged by 10kV casings with hull outside respectively are connected；First, the four, the 7th pressure regulation gear ends of the power transformer mesohigh voltage regulation coil respectively by 35kV casing connections to power transformer outside, be connected with implantable discharge source；The simulator is of low cost by carrying out reconfiguration to inside transformer winding line, easy to use；It is capable of the various shelf depreciation types of analogue transformer inside different location, can truly reflects inside transformer shelf depreciation, is conducive to find and repair partial discharge of transformer failure in time, extends the transformer station high-voltage side bus service life.
Description
Technical field
The invention belongs to electric power project engineering field, more particularly to a kind of partial discharge of transformer defects simulation device and side
Method.
Background technology
Transformer is one of the core equipment of network system and the equipment of most expensive, its operating status directly affects
The safety and stablization of entire network system.Due to the original of design and manufacture, process materials, operation and maintenance and running environment etc.
Cause so that inside transformer insulation fault happens occasionally.The initial stage of inside transformer insulation fault generally can all generate part and put
Electricity, therefore ensure that the sensitivity of local discharge signal monitoring and precision are very important.Currently, partial discharge of transformer detects
Method mainly has pulse current method, supercritical ultrasonics technology and superfrequency method, but since inside transformer structure is more complex, these detections
The accuracy of method exists certain insufficient with validity.
Invention content
The present invention is directed to the deficiencies in the prior art, by improving transformer coli winding connection type, builds mould
Quasi- device, accurately simulates and measures various shelf depreciation defects.
A kind of partial discharge of transformer defects simulation device, including power transformer 1, pressure regulator 2 and implantable are put
Power supply 3；
Wherein, pressure regulator 2 is connected with the power transformer 1 with implantable discharge source 3；
The two ends of the power transformer mesolow winding coil disconnect, and tail end passes through 10kV casings and shell respectively
The ends x, the ends y and the ends z of outside setting are connected；
First, the four, the 7th pressure regulation gear ends of the power transformer mesohigh voltage regulation coil are covered by 35kV respectively
Pipe is connected to outside power transformer, is connected with implantable discharge source；
It is provided with condenser-type terminal outside three-phase A, B, C high-tension coil of the power transformer.
It is provided with hyperfrequency flange-interface on the oil tank wall of the power transformer, and is provided on hyperfrequency flange-interface
Watch window.
Condenser-type terminal end outside three-phase A, B, C high-tension coil of the power transformer is provided with end shield measurement end
Son.
A kind of partial discharge of transformer defects simulation method, using above-mentioned partial discharge of transformer defects simulation device,
Access can between any two gear end in first, the four, the 7th pressure regulation gear ends of the A phase voltage regulation coils of power transformer
Implanted discharge source accesses excitation power supply between low-voltage coil the winding head end a and tail end x of A phases, then respectively by power transformer
The A phases of device, the ends head end A of B phase high-tension coil windings, the ends B and the ends O ground connection, measure Partial discharge signal amplitude on remaining terminal,
Phase and frequency spectrum.
Pressure regulation output end is connected with the low-pressure end of transformer by no partial discharge cable.By the output voltage for changing pressure regulator
Transformer low voltage winding voltage, i.e. driving voltage are adjusted, under the electromagnetic induction effect of transformer itself, respectively in transformer
High and low pressure side obtain required voltage, to meet the needs for simulating all kinds of electric discharges.
When the ends B are grounded, measure respectively between the ends A, C-terminal, the ends O, by, the signal amplitude between cz and on iron core terminal, phase
Position and frequency spectrum.
When the ends A are grounded, measure respectively between the ends B, C-terminal, the ends O, by, the signal amplitude between cz and on iron core terminal, phase
Position and frequency spectrum.
When the ends O are grounded, measure respectively between the ends A, the ends B, C-terminal, by, the signal amplitude between cz and on iron core terminal, phase
Position and frequency spectrum.
The ends y and/or the ends c are grounded.Shielding processing is carried out, orientation discharge rejected region is facilitated.
Advantageous effect
The present invention provides a kind of partial discharge of transformer defects simulation device and method, which includes power transformer
Device, pressure regulator and implantable discharge source；Wherein, pressure regulator and implantable discharge source with the power transformer phase
Even；The two ends of the power transformer mesolow winding coil disconnect, and tail end passes through 10kV casings and hull outside respectively
The ends x, the ends y and the ends z of setting are connected；First, the four, the 7th pressure regulation gears of the power transformer mesohigh voltage regulation coil
End respectively by 35kV casing connections to power transformer outside, be connected with implantable discharge source；The power transformer
It is provided with condenser-type terminal outside three-phase A, B, C high-tension coil.The simulator is by changing inside transformer winding line
It connects, it is of low cost, it is easy to use；It is capable of the various shelf depreciation types of analogue transformer inside different location, it can be truly
Reflect inside transformer shelf depreciation, for research partial discharge of transformer mechanism, verification partial discharge of transformer detection device
Accuracy and research transformer partial discharge signal have great importance in the transmission characteristic of inside transformer.Be conducive to
Partial discharge of transformer failure is found and repaired in time, the transformer station high-voltage side bus service life is extended.
Description of the drawings
Fig. 1 is the overall structure diagram of device of the present invention；
Fig. 2 is inside transformer winding line connection diagram in the prior art；
Fig. 3 is the inside winding line schematic diagram of transformer in simulator of the present invention；
Label declaration：1- power transformers, 2- pressure regulators, 3- implantable discharge sources.
Specific implementation mode
Below in conjunction with drawings and examples, the present invention is described further.
Referring to Fig. 1, a kind of partial discharge of transformer defects simulation device, including power transformer 1, pressure regulator 2 and can
Implanted discharge source 3；
Wherein, pressure regulator 2 is connected with the power transformer 1 with implantable discharge source 3；
The two ends of the power transformer mesolow winding coil disconnect, and tail end passes through 10kV casings and shell respectively
The ends x, the ends y and the ends z of outside setting are connected；
First, the four, the 7th pressure regulation gear ends of the power transformer mesohigh voltage regulation coil are covered by 35kV respectively
Pipe is connected to outside power transformer, is connected with implantable discharge source；
It is provided with condenser-type terminal outside three-phase A, B, C high-tension coil of the power transformer.
Power transformer 1 is to be transformed using a 35kV transformer, and major parameter is as follows：Model SZ10-5000/
35, rated capacity 5000kVA, rated voltage and tapping range：(35 ± 3*2.5%)/10.5kV, bind mode：YD11.
Back panel wiring before transformation is as shown in Fig. 2, back panel wiring is as shown in Figure 3 after transformation.
The content of transformation is as follows：(1) low pressure winding is transformed, and transformer △ connection winding head and the tail junction is opened, is passed through
X, y, z terminals are led to hull outside by three 10 KV casings of increase；(2) high-voltage winding is transformed, and chooses the 1st, 4,7 tap
Lead leads to outside by 35kV casings, for external turn-to-turn short circuit electric discharge source model；(3) fuel tank is redesigned, is increased super
High frequency-flange interface, watch window；(4) three bushings are replaced, change condenser-type terminal, band end shield measurement terminal into.
Pressure regulator 2 is three-phase regulator, and input voltage three-phase AC 380V, output three-phase AC 0-15.75kV are adjustable, capacity
10kVA there is step-up/down control, voltage and current to show, overcurrent protection etc..
Pressure regulation output end is connected with the low-pressure end of transformer by no partial discharge cable.By the output voltage for changing pressure regulator
Transformer low voltage winding voltage, i.e. driving voltage are adjusted, under the electromagnetic induction effect of transformer itself, respectively in transformer
High and low pressure side obtain required voltage, to meet the needs for simulating all kinds of electric discharges.
Implantable discharge source 3, electric discharge type include：Creeping discharge, suspended discharge, turn-to-turn electric discharge, bubble in oil electric discharge,
Point discharge, oil clearance electric discharge, magnetic screen electric discharge, electrical shielding electric discharge.
(1) ax accesses excitation power supply, and short circuit dischange between outer turns is accessed between two leads of high pressure A phase tap-changing windings
Various types of other turn-to-turn discharge fault is simulated in source, by changing the earthing mode of A, B, O terminal, is realized under each discharge defect, is put
Transmission and signal identification of the electric signal under different paths；
(2) B is grounded, ax excitations, the electric discharge of simulated high-pressure thiol, is measured in A, C, O, by, cz, iron core terminal, analysis
Partial discharge signal amplitude, phase and frequency spectrum；
(3) A is grounded, ax excitations, the electric discharge of simulated high-pressure thiol, is measured in B, C, O, by, cz, iron core terminal, analysis
Partial discharge signal amplitude, phase and frequency spectrum；
(4) O is grounded, ax excitations, the electric discharge of simulated high-pressure coil tail portion, is measured in A, B, C, by, cz, iron core terminal, analysis
Partial discharge signal amplitude, phase and frequency spectrum；
(5) when needing to be accurately positioned shelf depreciation defective locations, shielding is realized at the ends y and/or the ends c ground connection.
Use above specific case is illustrated the present invention, is intended merely to help those skilled in the art
It is well understood by.Without departing from the spirit and scope of the present invention, the specific implementation mode of the present invention can also be made
It is various to deduce, deform and replace.These changes and replacement will all be fallen in claims of the present invention limited range.
Claims (9)
1. a kind of partial discharge of transformer defects simulation device, which is characterized in that including power transformer (1), pressure regulator (2) with
And implantable discharge source (3)；
Wherein, pressure regulator (2) is connected with the power transformer (1) with implantable discharge source (3)；
The two ends of the power transformer mesolow winding coil disconnect, and tail end passes through 10kV casings and hull outside respectively
The ends x, the ends y and the ends z of setting are connected；
First, the four, the 7th pressure regulation gear ends of the power transformer mesohigh voltage regulation coil are connected by 35kV casings respectively
It is connected to outside power transformer, is connected with implantable discharge source (3)；
It is provided with condenser-type terminal outside three-phase A, B, C high-tension coil of the power transformer.
2. the apparatus according to claim 1, which is characterized in that be provided with hyperfrequency on the oil tank wall of the power transformer
Flange-interface, and it is provided with watch window on hyperfrequency flange-interface.
3. the apparatus of claim 2, which is characterized in that outside three-phase A, B, C high-tension coil of the power transformer
Condenser-type terminal end be provided with end shield measurement terminal.
4. a kind of partial discharge of transformer defects simulation method, which is characterized in that become using claim 1-3 any one of them
Depressor shelf depreciation defects simulation device, at first, the four, the 7th pressure regulation gear ends of the A phase voltage regulation coils of power transformer
Implantable discharge source is accessed between middle any two gear end, it is indirectly in low-voltage coil the winding head end a and tail end x of A phases
Enter excitation power supply, then be respectively grounded the A phases of power transformer, the ends head end A of B phase high-tension coil windings, the ends B and the ends O, surveys
Measure Partial discharge signal amplitude, phase and the frequency spectrum on remaining terminal.
5. according to the method described in claim 4, it is characterized in that, when the ends B are grounded, the ends A, C-terminal, the ends O, by are measured respectively
Between, the signal amplitude between cz and on iron core terminal, phase and frequency spectrum.
6. according to the method described in claim 4, it is characterized in that, when the ends A are grounded, the ends B, C-terminal, the ends O, by are measured respectively
Between, the signal amplitude between cz and on iron core terminal, phase and frequency spectrum.
7. according to the method described in claim 4, it is characterized in that, when the ends O are grounded, the ends A, the ends B, C-terminal, by are measured respectively
Between, the signal amplitude between cz and on iron core terminal, phase and frequency spectrum.
8. according to claim 4-7 any one of them methods, which is characterized in that the ends y and/or the ends c to be grounded.
9. according to the method described in claim 8, it is characterized in that, the implantable discharge source includes following several types：
Creeping discharge, suspended discharge, turn-to-turn electric discharge, bubble in oil electric discharge, point discharge, oil clearance electric discharge, magnetic screen electric discharge and
Electrical shielding discharges.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610865900.1A CN106291296B (en) | 2016-09-29 | 2016-09-29 | A kind of partial discharge of transformer defects simulation device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610865900.1A CN106291296B (en) | 2016-09-29 | 2016-09-29 | A kind of partial discharge of transformer defects simulation device and method |
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| Publication Number | Publication Date |
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| CN106291296A CN106291296A (en) | 2017-01-04 |
| CN106291296B true CN106291296B (en) | 2018-10-26 |
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| CN107085645A (en) * | 2017-04-28 | 2017-08-22 | 南方电网科学研究院有限责任公司 | Method and system for optimizing oiled paper capacitive bushing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233305A (en) * | 1991-02-15 | 1993-08-03 | Fuji Electric Co., Ltd. | Partial discharge detecting device for resin-molded transformer |
| CN201402305Y (en) * | 2009-04-24 | 2010-02-10 | 上海久隆电气设备试验有限公司 | Wiring structure for partial discharge tests of dry-type transformer |
| CN101826391A (en) * | 2009-07-29 | 2010-09-08 | 福州天宇电气股份有限公司 | Segmented layered structure transformer |
| CN101900782A (en) * | 2010-07-01 | 2010-12-01 | 思源电气股份有限公司 | Testing system of gas insulated combined electric appliance equipment |
| CN104166080A (en) * | 2014-09-05 | 2014-11-26 | 国家电网公司 | GIS device partial discharge defect simulation device used on non-power-frequency working condition |
| CN105785240A (en) * | 2016-03-15 | 2016-07-20 | 广州供电局有限公司 | Oil-immersed transformer integrated partial discharge defect simulator |
| CN105823969A (en) * | 2016-04-29 | 2016-08-03 | 国家电网公司 | Apparatus for simulating partial discharge detects of transformer |
-
2016
- 2016-09-29 CN CN201610865900.1A patent/CN106291296B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233305A (en) * | 1991-02-15 | 1993-08-03 | Fuji Electric Co., Ltd. | Partial discharge detecting device for resin-molded transformer |
| CN201402305Y (en) * | 2009-04-24 | 2010-02-10 | 上海久隆电气设备试验有限公司 | Wiring structure for partial discharge tests of dry-type transformer |
| CN101826391A (en) * | 2009-07-29 | 2010-09-08 | 福州天宇电气股份有限公司 | Segmented layered structure transformer |
| CN101900782A (en) * | 2010-07-01 | 2010-12-01 | 思源电气股份有限公司 | Testing system of gas insulated combined electric appliance equipment |
| CN104166080A (en) * | 2014-09-05 | 2014-11-26 | 国家电网公司 | GIS device partial discharge defect simulation device used on non-power-frequency working condition |
| CN105785240A (en) * | 2016-03-15 | 2016-07-20 | 广州供电局有限公司 | Oil-immersed transformer integrated partial discharge defect simulator |
| CN105823969A (en) * | 2016-04-29 | 2016-08-03 | 国家电网公司 | Apparatus for simulating partial discharge detects of transformer |
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