CN104064334A - Grounding screen for main oil gallery of high-voltage and low-voltage coils of transformer - Google Patents

Grounding screen for main oil gallery of high-voltage and low-voltage coils of transformer Download PDF

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Publication number
CN104064334A
CN104064334A CN201410322973.7A CN201410322973A CN104064334A CN 104064334 A CN104064334 A CN 104064334A CN 201410322973 A CN201410322973 A CN 201410322973A CN 104064334 A CN104064334 A CN 104064334A
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CN
China
Prior art keywords
low
high
voltage coil
voltage
earthing
Prior art date
Application number
CN201410322973.7A
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Chinese (zh)
Inventor
肖俊承
王路阳
Original Assignee
伊戈尔电气股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 伊戈尔电气股份有限公司 filed Critical 伊戈尔电气股份有限公司
Priority to CN201410322973.7A priority Critical patent/CN104064334A/en
Publication of CN104064334A publication Critical patent/CN104064334A/en

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Abstract

The invention discloses a grounding screen for a main oil gallery of high-voltage and low-voltage coils of a transformer. The grounding screen comprises the high-voltage coil and the low-voltage coil and is characterized in that the grounding screen is arranged in the main oil gallery between the high-voltage coil and the low-voltage coil, the grounding screen is respectively wound around the high-voltage coil and the low-voltage coil, and the portion, at the high-voltage coil end, of the grounding screen and the portion, at the low-voltage coil end, of the grounding screen are respectively connected with a grounding bushing. Multi-split windings are adopted in the grounding screen, the main oil gallery of each set of high-voltage and low-voltage coils is of an 'oil clearance + grounding screen + oil clearance' structure, in the work process of the transformer, the high-voltage coil and the low-voltage coil of the transformer are protected, meanwhile, pollution caused by higher harmonics to power grid power supply is effectively reduced, and safe operation of the transformer is guaranteed. The grounding screen is simple in structure, high in safety, good in protection performance and capable of effectively protecting the transformer and a power supply power grid.

Description

A kind of transformer high-low-voltage coil main oil gallery earthing

Technical field

The present invention relates to earthing structure, especially a kind of transformer high-low-voltage coil main oil gallery earthing.

Background technology

At German 20-35kV level solar photo-voltaic power generation station, main employing is two divides and tripartition oil immersed type step-up transformer many inverters such as supporting 550kW, 625kW and 1000kW respectively at present.Solar photovoltaic technology is to convert solar energy into direct current by photovoltaic module, by grid type inverter, direct current is converted into electrical network same frequency, synchronous sine-wave current and enters electrical network again, in inversion process, can produce a large amount of harmonic waves, by suppressing the measure of harmonic wave, still can remaining high order harmonic component, high order harmonic component can be coupled to high-pressure side one time by low voltage winding in transformers like this, and mains supply is produced and polluted, and can effectively alleviate this pollution with earthing; Secondly be exactly that earthing can effectively be protected the safety of the equipment such as secondary low-voltage side and inverter in the time that high-pressure side thunderbolt and overvoltage cause primary insulation to puncture because first puncture be high-pressure side to shield instead of high-pressure side to low-pressure side.

Summary of the invention

The object of this invention is to provide a kind of simple in structure, simple installation, safe, the transformer high-low-voltage coil main oil gallery earthing that barrier propterty is good.

For achieving the above object, the technical solution adopted in the present invention is: a kind of transformer high-low-voltage coil main oil gallery earthing, comprise: high-tension coil, low-voltage coil, it is characterized in that: in the main oil gallery between high-tension coil and low-voltage coil, be provided with earthing, described earthing is wound on respectively on high-tension coil and low-voltage coil, and the earthing of high-voltage coil end and low-voltage coil end earthing are connected with grounding sleeve respectively.

Preferably, it is high that the width of described earthing equals coil reactance, and the length of earthing is less than low-voltage coil interior loop girth 10 ~ 15mm.

Preferably, described high-voltage coil end earthing and low-voltage coil end earthing do not overlap, separated state.

Preferably, on described earthing, be welded with and draw copper sheet, this is drawn copper sheet and is connected with grounding sleeve.

Preferably, described earthing is the thick Copper Foil of 0.2mm.

The present invention adopts after said structure; between every group of high-voltage coil and low-voltage coil main oil gallery of employing many divisions winding, all adopt separately " oil clearance+earthing+oil clearance " structure; in the course of work of transformer, realize the protection to transformer high-voltage lateral coil and low-voltage side coil; effectively reduce the pollution of high order harmonic component to mains supply simultaneously, ensure the safe operation of transformer.The present invention is simple in structure, safe, and barrier propterty is good, can effectively protect transformer and power supply grid.

Brief description of the drawings

Fig. 1 is topology view of the present invention.

In figure: 1, high-tension coil, 2, low-voltage coil, 3, earthing, 4, draw copper sheet.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:

As shown in the figure, a kind of transformer high-low-voltage coil main oil gallery earthing, comprise: high-tension coil 1, low-voltage coil 2, it is characterized in that: in the main oil gallery between high-tension coil 1 and low-voltage coil 2, be provided with earthing 3, described earthing 3 is wound on respectively on high-tension coil 1 and low-voltage coil 2, and the earthing 3 of high-tension coil 1 end and low-voltage coil 2 end earthings 3 are connected with grounding sleeve respectively.

Preferably, it is high that the width of described earthing 3 equals coil reactance, and the length of earthing 3 is less than low-voltage coil 2 interior loop girth 10 ~ 15mm.

Preferably, described high-tension coil 1 end earthing 3 and low-voltage coil 2 end earthings 3 do not overlap, separated state.

Preferably, on described earthing 3, be welded with and draw copper sheet 4, this is drawn copper sheet 4 and is connected with grounding sleeve.

Preferably, described earthing 3 is the thick Copper Foil of 0.2mm.

The above is the preferred embodiment of the present invention; certainly can not limit with this interest field of the present invention; should be understood that; for those skilled in the art; technical scheme of the present invention is modified or is equal to replacement, do not depart from the protection range of technical solution of the present invention.

Claims (5)

1. a transformer high-low-voltage coil main oil gallery earthing, comprise: high-tension coil (1), low-voltage coil (2), it is characterized in that: in the main oil gallery between high-tension coil (1) and low-voltage coil (2), be provided with earthing (3), described earthing (3) is wound on respectively high-tension coil (1) and low-voltage coil (2) is upper, and earthing (3) and low-voltage coil (2) the end earthing (3) of high-tension coil (1) end are connected with grounding sleeve respectively.
2. transformer high-low-voltage coil main oil gallery earthing according to claim 1, is characterized in that: it is high that the width of described earthing (3) equals coil reactance, the length of earthing (3) is less than low-voltage coil (2) interior loop girth 10 ~ 15mm.
3. transformer high-low-voltage coil main oil gallery earthing according to claim 1, is characterized in that: described high-tension coil (1) end earthing (3) and low-voltage coil (2) end earthing (3) do not overlap, separated state.
4. transformer high-low-voltage coil main oil gallery earthing according to claim 1, is characterized in that: on described earthing (3), be welded with and draw copper sheet (4), this is drawn copper sheet (4) and is connected with grounding sleeve.
5. transformer high-low-voltage coil main oil gallery earthing according to claim 1, is characterized in that: described earthing (3) is the thick Copper Foil of 0.2mm.
CN201410322973.7A 2014-07-09 2014-07-09 Grounding screen for main oil gallery of high-voltage and low-voltage coils of transformer CN104064334A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410322973.7A CN104064334A (en) 2014-07-09 2014-07-09 Grounding screen for main oil gallery of high-voltage and low-voltage coils of transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410322973.7A CN104064334A (en) 2014-07-09 2014-07-09 Grounding screen for main oil gallery of high-voltage and low-voltage coils of transformer

Publications (1)

Publication Number Publication Date
CN104064334A true CN104064334A (en) 2014-09-24

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CN201410322973.7A CN104064334A (en) 2014-07-09 2014-07-09 Grounding screen for main oil gallery of high-voltage and low-voltage coils of transformer

Country Status (1)

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CN (1) CN104064334A (en)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295112A (en) * 1978-08-30 1981-10-13 Mitsubishi Denki Kabushiki Kaisha Residual current transformer
CN200972818Y (en) * 2006-11-24 2007-11-07 曹麾 Distribution transformer with screening
WO2009123977A1 (en) * 2008-03-31 2009-10-08 Nellcor Puritan Bennett Llc Ventilator based on a fluid equivalent of the "digital to analog voltage" concept
CN201508753U (en) * 2009-09-25 2010-06-16 济南法奥电气有限责任公司 Oil immersion-type rectifier transformer specially used for frequency conversion
CN201673782U (en) * 2010-05-13 2010-12-15 李景禄 Lightning protection distribution transformer
CN101968993A (en) * 2010-07-16 2011-02-09 江苏上能变压器有限公司 220 kilovolt grade low-voltage winding split on-load voltage-regulating wind power transformer
CN101996756A (en) * 2009-08-13 2011-03-30 上海置信电气股份有限公司 Amorphous alloy 35kV oil immersed type transformer for solar power generation
CN103125003A (en) * 2010-09-08 2013-05-29 Abb技术股份有限公司 Transformer winding
CN103632816A (en) * 2012-08-22 2014-03-12 重庆市帝迅电气科技有限公司 High-lightning-resistant power transformer and dry or oil-immersed power transformer including same
CN204011009U (en) * 2014-07-09 2014-12-10 伊戈尔电气股份有限公司 A kind of transformer high-low-voltage coil main oil gallery earthing

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295112A (en) * 1978-08-30 1981-10-13 Mitsubishi Denki Kabushiki Kaisha Residual current transformer
CN200972818Y (en) * 2006-11-24 2007-11-07 曹麾 Distribution transformer with screening
WO2009123977A1 (en) * 2008-03-31 2009-10-08 Nellcor Puritan Bennett Llc Ventilator based on a fluid equivalent of the "digital to analog voltage" concept
CN101996756A (en) * 2009-08-13 2011-03-30 上海置信电气股份有限公司 Amorphous alloy 35kV oil immersed type transformer for solar power generation
CN201508753U (en) * 2009-09-25 2010-06-16 济南法奥电气有限责任公司 Oil immersion-type rectifier transformer specially used for frequency conversion
CN201673782U (en) * 2010-05-13 2010-12-15 李景禄 Lightning protection distribution transformer
CN101968993A (en) * 2010-07-16 2011-02-09 江苏上能变压器有限公司 220 kilovolt grade low-voltage winding split on-load voltage-regulating wind power transformer
CN103125003A (en) * 2010-09-08 2013-05-29 Abb技术股份有限公司 Transformer winding
CN103632816A (en) * 2012-08-22 2014-03-12 重庆市帝迅电气科技有限公司 High-lightning-resistant power transformer and dry or oil-immersed power transformer including same
CN204011009U (en) * 2014-07-09 2014-12-10 伊戈尔电气股份有限公司 A kind of transformer high-low-voltage coil main oil gallery earthing

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Application publication date: 20140924

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