CN101571568B - Ultrasonic planar array sensor suitable for partial discharge detection of transformer - Google Patents
Ultrasonic planar array sensor suitable for partial discharge detection of transformer Download PDFInfo
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- CN101571568B CN101571568B CN2009100743516A CN200910074351A CN101571568B CN 101571568 B CN101571568 B CN 101571568B CN 2009100743516 A CN2009100743516 A CN 2009100743516A CN 200910074351 A CN200910074351 A CN 200910074351A CN 101571568 B CN101571568 B CN 101571568B
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- 238000001514 detection method Methods 0.000 title abstract 2
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 24
- 239000010935 stainless steel Substances 0.000 claims abstract description 24
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 5
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 210000004907 gland Anatomy 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 abstract description 5
- 239000004945 silicone rubber Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004304 visual acuity Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Testing Relating To Insulation (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to an ultrasonic planar array sensor suitable for the partial discharge detection of a transformer, which comprises 16 piezoelectric matrix elements arranged in silicone rubber filling in a stainless steel casing. The piezoelectric matrix elements are respectively connected with cables through matrix element leading wires; and a stainless steel protecting film is arranged at the bottom of the piezoelectric matrix element which is below the stainless steel casing. The ultrasonic planar array sensor can be directly arranged on the outer wall of a transformer after being provided with magnetic media and is connected with a high-speed data synchronous acquisition device through 16 cables, thereby obtaining good partial discharge ultrasonic signals, forming an array model and laying a good foundation for the realization of location algorithm based on array signal treatment.
Description
Technical field
The present invention relates to the ultrasonic planar array sensor that a kind of partial discharge of transformer detects.
Background technology
Along with development and national economy, to the electric system reliability service require increasingly highly, and power transformer is the hinge equipment in the electric system, its operational reliability is directly connected to the safety and stablization of electric system.To the statistical results show of physical fault, insulation fault is the main cause that influences the normal operation of transformer, and shelf depreciation is to cause the major reason of insulation fault.
Current; The state maintenance of development power equipment has become a kind of inexorable trend; And not only there is important booster action shelf depreciation location to the assessment of the extent of injury of shelf depreciation accurately; And the guidance of science can be provided for the repair based on condition of component of transformer, so that the maintainer carries out ME with a definite target in view, help discharging rapidly fault and improve the maintenance level; Simultaneously the design of improvement transformer device structure, raising manufacturing technology level there are directive significance, can well improve the transformer reliability of operation.
Since the eighties in 20th century, detected existing a large amount of fundamental research and application and development work around partial discharge of transformer.At present, existing transformer partial discharge positioning method mainly contains three kinds of electrical Location method, superfrequency localization method and ultrasonic locating methods.The ultrasonic locating method is the locus according to the direction of the ultrasonic propagation of shelf depreciation generation and definite discharge source of time.Ultrasonic locating method principle is simple, and anti-electromagnetic interference capability is strong, and cost is low, can directly realize geometry location.But ultrasonic locating method sensor is made up of single matrix element at present, and sensitivity is very low, can't measure signal at the scene effectively; Secondly the anti-electromagnetic interference capability of sensor is relatively poor, and ultrasonic signal is often because of the route of transmission, frequency, factor affecting distortions such as speed.The problems referred to above press for solution.
Summary of the invention
Technical matters to be solved by this invention provide a kind ofly have the control of wave beam flexibly, high signal gain, interference rejection capability and spatial resolving power is applicable to the ultrasonic planar array sensor that partial discharge of transformer detects preferably.
The present invention adopts following technical scheme:
The present invention is made up of 16 piezoelectricity array elements in the silicon rubber filling material that is arranged in the Stainless Steel Shell, and described 16 piezoelectricity array elements are connected with cable through the array element lead-in wire respectively, and the bottom of piezoelectricity array element is provided with the stainless steel cuticula in the Stainless Steel Shell lower end.
The present invention is provided with the stainless steel cover that has cable in the Stainless Steel Shell upper end, is provided with gland nut between cable and the stainless steel cover.
Beneficial effect of the present invention: ultrasonic planar array sensor of the present invention; Compare with traditional single-sensor, ultrasonic planar array sensor of the present invention has the control of wave beam flexibly, high signal gain, interference rejection capability and spatial resolving power preferably.Ultrasonic planar array sensor of the present invention can directly be placed in the transformer outer wall after installing magnetic medium additional; And through 16 cables access high-speed data synchronous acquisition devices; Can obtain good type local-discharge ultrasonic signal and form Array Model, for realizing establishing good basis based on the location algorithm of Array Signal Processing.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention;
Accompanying drawing 2 is a cross section structure synoptic diagram of the present invention.
In the accompanying drawings: 1 cable, 2 gland nuts, 3 stainless steel covers, 4 array elements lead-in wire, 5 shape of the mouth as one speaks circles, 6 stainless steel cuticula, 7 piezoelectricity array elements, 8 Stainless Steel Shell, 9 silicon rubber filling material.
Embodiment
Like accompanying drawing 1, shown in 2; The present invention is made up of 16 piezoelectricity array elements 7 in the silicon rubber filling material 9 that is arranged in the Stainless Steel Shell 8; Described 16 piezoelectricity array elements 7 are connected with 16 core cables 1 through array element lead-in wire 4 respectively, are provided with stainless steel cuticula 6 in the bottom of Stainless Steel Shell 8.
The present invention is provided with between stainless steel cover 3, the 16 core cables 1 that have 16 core cables 1 and the stainless steel cover 3 in Stainless Steel Shell 8 upper ends and is provided with gland nut 2.
Ultrasonic planar array sensor of the present invention is made up of 16 piezoelectricity array elements 7 (piezoelectric ceramics array element) altogether, and piezoelectricity array element 7 spacings are 5mm.Each piezoelectricity array element 7 comprises square piezoelectric chip planar array, sound absorption backing, acoustic matching layer and other structure (contact conductor, shell etc.) four major parts, and piezoelectricity array element 7 length and width height are of a size of 4 * 4 * 15mm.
Ultrasonic planar array sensor of the present invention can directly be placed in the transformer outer wall after installing magnetic medium additional; And through 16 cables access high-speed data synchronous acquisition devices; Can obtain good type local-discharge ultrasonic signal and form Array Model, for realizing establishing good basis based on the location algorithm of Array Signal Processing.
Claims (1)
1. ultrasonic planar array sensor that is applicable to that partial discharge of transformer detects; It is characterized in that it is made up of 16 the piezoelectricity array elements (7) in the silicon rubber filling material (9) that is arranged in the Stainless Steel Shell (8); Described 16 piezoelectricity array elements (7) are connected with cable (1) through array element lead-in wire (4) respectively, are provided with stainless steel cuticula (6) in the bottom of Stainless Steel Shell (8) lower end piezoelectricity array element (7); Be provided with the stainless steel cover (3) that has cable (1) in Stainless Steel Shell (8) upper end; Be provided with gland nut (2) between cable (1) and the stainless steel cover (3); Ultrasonic planar array sensor is made up of 16 piezoelectricity array elements (7) altogether; Piezoelectricity array element (7) spacing is 5mm, and each piezoelectricity array element (7) comprises square piezoelectric chip planar array, sound absorption backing, acoustic matching layer and contact conductor four major parts, and piezoelectricity array element (7) length and width height is of a size of 4 * 4 * 15mm; Ultrasonic planar array sensor can be placed in the transformer outer wall after installing magnetic medium additional, and inserts high-speed data synchronous acquisition device through 16 cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100743516A CN101571568B (en) | 2009-05-15 | 2009-05-15 | Ultrasonic planar array sensor suitable for partial discharge detection of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100743516A CN101571568B (en) | 2009-05-15 | 2009-05-15 | Ultrasonic planar array sensor suitable for partial discharge detection of transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101571568A CN101571568A (en) | 2009-11-04 |
| CN101571568B true CN101571568B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100743516A Active CN101571568B (en) | 2009-05-15 | 2009-05-15 | Ultrasonic planar array sensor suitable for partial discharge detection of transformer |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390045A (en) * | 2011-07-01 | 2012-03-28 | 南京航空航天大学 | Grinding tool capable of actively compensating surface shape abrasion errors and compensating method thereof |
| CN102279354B (en) * | 2011-07-01 | 2013-07-31 | 西安交通大学 | Cruciform ultrasound array sensor and method for positioning transformer partial discharge |
| CN102830333B (en) * | 2012-09-10 | 2015-06-10 | 上海交通大学 | Transformer substation local discharge positioning method based on electromagnetic antenna array signal processing |
| CN105334480B (en) * | 2014-08-11 | 2018-09-18 | 国家电网公司 | The determination method and apparatus of the sensor array spatial position of four array elements |
| CN109507556A (en) * | 2018-12-28 | 2019-03-22 | 国网山东省电力公司高密市供电公司 | MDS type switchgear fault detection alarm device |
| CN110865287A (en) * | 2019-11-27 | 2020-03-06 | 国网重庆市电力公司电力科学研究院 | GIS partial discharge positioning device |
| CN111105926B (en) * | 2019-12-14 | 2022-04-19 | 深圳先进技术研究院 | Preparation method of flexible piezoresistive sensor of transformer and transformer |
| CN117347797A (en) * | 2023-09-28 | 2024-01-05 | 中国长江电力股份有限公司 | Ultrasonic array detection device and method for partial discharge |
| CN117929541A (en) * | 2024-03-21 | 2024-04-26 | 东莞理工学院 | Air coupling ultrasonic guided wave array transducer and variable-mode excitation method thereof |
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- 2009-05-15 CN CN2009100743516A patent/CN101571568B/en active Active
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| CN101571568A (en) | 2009-11-04 |
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Owner name: HEBEI ELECTRIC POWER CORPORATION ELECTRIC POWER RE Free format text: FORMER OWNER: HEBEI ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20121219 Owner name: STATE GRID CORPORATION OF CHINA HEBEI ELECTRIC POW Free format text: FORMER OWNER: HEBEI ELECTRIC POWER CONSTRUCTION + ADJUSTMENT RESEARCH INSTITUTE Effective date: 20121219 |
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Effective date of registration: 20121219 Address after: 050021 No. 238 South Sports street, Yuhua Road, Hebei, Shijiazhuang Patentee after: Electric Power Research Institute of Hebei Electric Power Corporation Patentee after: State Grid Corporation of China Patentee after: Hebei Electric Power Construction & Adjustment Research Institute Address before: 050021 No. 238 South Sports street, Hebei, Shijiazhuang Patentee before: Hebei Electric Power Research Institute Patentee before: Hebei Electric Power Construction & Adjustment Research Institute |