CN206819862U - Photovoltaic transformer - Google Patents

Photovoltaic transformer Download PDF

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Publication number
CN206819862U
CN206819862U CN201720571960.2U CN201720571960U CN206819862U CN 206819862 U CN206819862 U CN 206819862U CN 201720571960 U CN201720571960 U CN 201720571960U CN 206819862 U CN206819862 U CN 206819862U
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CN
China
Prior art keywords
coil
low
semisection
voltage
drawn
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Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CN201720571960.2U
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Chinese (zh)
Inventor
王桂兵
雍小凤
姚永煊
高金建
王�华
李宁
李海涛
杨树雪
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Liaoning Is When Triumphant Utilities Electric Co Ltd
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Liaoning Is When Triumphant Utilities Electric Co Ltd
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Application filed by Liaoning Is When Triumphant Utilities Electric Co Ltd filed Critical Liaoning Is When Triumphant Utilities Electric Co Ltd
Priority to CN201720571960.2U priority Critical patent/CN206819862U/en
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Publication of CN206819862U publication Critical patent/CN206819862U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model is to be applicable the photovoltaic transformer that voltage is 10 35KV, including iron core and high-voltage coil and low-voltage coil, low-voltage coil upper semisection for it is left around to, drawn in coil upper semisection two ends, low-voltage coil lower semisection for it is right around to, two ends are drawn in coil lower semisection bottom, and placement end is enclosed its two ends and drawn respectively among low-voltage coil upper semisection and lower semisection.High-tension coil upper semisection for it is left around to, head end is drawn in end turn, tap and tail end coil width to extraction;High-tension coil lower semisection for it is right around to, head end is drawn in coil bottom, tap and tail end coil width to extraction;Place after the head end, tail end and tap parallel connection of its upper semisection and lower semisection are enclosed in end and draw among high-tension coil upper semisection and lower semisection.Low-voltage coil uses axial split formula structure, and equivalent to two transformer station high-voltage side bus of a transformer, high-tension coil is used in parallel using two sections, when one group of fault of converter, another group of normal operation, it is ensured that the ampere-turn equilibrium of normal operation coil.

Description

Photovoltaic transformer
Technical field
The utility model is related to the design of transformer in power industry equipment, the particularly scope of application is voltage 10-35KV Photovoltaic transformer.
Background technology
As world environments is seriously polluted and energy shortage, searching and tap a new source of energy that people make more efforts are forced.Profit It is exactly a kind of project newly developed using regenerative resource with solar power generation.Photovoltaic generation cost is low, pollution-free, obtains Widely popularize.Because common transformer structure is inapplicable and photovoltaic generating system, so structure must be used to be different from common become The photovoltaic transformer of depressor, to adapt to photovoltaic generating system.
The content of the invention
The purpose of the utility model is that solve common transformer not applying to photovoltaic generating system, it is necessary to which structure is different from common become The photovoltaic transformer of depressor, there is provided a kind of scope of application voltage is 10~35KV photovoltaic transformer, the electricity that solar energy is sent After voltage of transformation, national grid is sent into, while the property indices of photovoltaic transformer are ensured, reduces manufacturing cost.
Technical scheme provided by the utility model is to achieve the above object:A kind of photovoltaic transformer, including iron core and The coil being arranged on iron core, is wound with low-voltage coil outside iron core, and low-voltage coil periphery sets heat radiation oil duct, outside heat radiation oil duct Provided with ground screen;Main oil gallery is provided with outside ground screen, high-tension coil is provided with outside main oil gallery, it is characterized in that:Described low-voltage coil and High-tension coil is divided into upper semisection and lower semisection;Low-voltage coil upper semisection is using a left side around to two ends are in low-voltage coil upper semisection Draw, low-voltage coil lower semisection is using right around to two ends are drawn in low-voltage coil lower half pars infrasegmentalis;Low-voltage coil upper semisection with Placement end is enclosed its two ends and drawn respectively among lower semisection;Described high-tension coil upper semisection is using a left side around to head end is online End is enclosed to draw, tap and tail end high-tension coil width to extraction;High-tension coil lower semisection is using the right side around to head end is in height The bottom of line ball circle is drawn, tap and tail end high-tension coil width to extraction;Among high-tension coil upper semisection and lower semisection Place after the head end, tail end and tap parallel connection of its upper semisection and lower semisection are enclosed in end and draw.
The extraction in parallel of the upper semisection of described high-tension coil and the two ends of lower semisection, high-tension coil interlayer use 0.075NW cable insulating papers.
Described ground screen uses 3 layers of 0.075NW cable insulating papers, and 2 layers of 0.075NW insulation are placed between ground screen and main oil gallery Cable paper.
Described low-voltage coil uses axial split formula structure, and low-voltage coil interlayer uses water chestnut lattice point gummed paper.
Low-voltage coil in the utility model uses axial split formula structure, and equivalent to two transformers of a transformer exist Operation, one group of inverter break down, and because transformer division reactance is big, another group can be with normal operation.High-tension coil uses Two sections used in parallel, when one group of inverter breaks down, during another group of normal operation, due to low-voltage coil upper semisection and high-voltage line The impedance enclosed between lower semisection or low-voltage coil lower semisection and high-tension coil upper semisection is big, it is ensured that the peace of normal operation coil Circle balances;High-tension coil layer insulation uses 0.075NW cable papers, can reduce width to size, reduce transformer manufacturing cost; Dielectric loss is also reduced simultaneously, improves the performance of transformer;Ground screen between high-voltage coil and low-voltage coil is destroyed between height Coupled capacitor, electrostatic induction voltage is reduced, there is protective effect to inverter.
Brief description of the drawings
Fig. 1 is the utility model high and low pressure coil top view.
Fig. 2 is the utility model low-voltage coil Butut.
Fig. 3 is the utility model high-tension coil Butut.
In figure:1 iron core;2 low-voltage coils;2-1 low-voltage coil upper semisections;2-2 low-voltage coil lower semisections;3 radiating oil Road;4 ground screens;Main oil gallery between 5 high-low pressures;6 high-tension coils;6-1 high-tension coil upper semisections;6-2 high-tension coil lower semisections; 7 ends are enclosed.
Embodiment
As shown in figure 1, the utility model photovoltaic transformer scope of application voltage is 10~35KV, the transformer includes iron core And the coil on iron core is arranged on, iron core 1 is Long Circle, and iron yoke uses D type yokes, can reduce iron core weight, reduction is manufactured into This;Low-voltage coil 2 is wound with outside iron core 1, the periphery of low-voltage coil 2 sets heat radiation oil duct 3, and the outside of heat radiation oil duct 3 is provided with ground screen 4;Electrostatic induction voltage can be reduced using ground screen, there is protective effect to inverter.Main oil gallery 5 is provided with outside ground screen, ground screen 4 is exhausted Edge is using 3 layers of 0.075NW cable insulating papers are placed, and pad puts 2 layers of 0.075NW cable insulating papers between ground screen 4 and main oil gallery 5; The outside of main oil gallery 5 sets high-tension coil 6.
As shown in Figure 2 and Figure 3, described low-voltage coil and high-tension coil are divided into upper semisection and lower semisection, low referring to Fig. 2 Line ball circle upper semisection(2-1)Using a left side around to two ends are drawn in low-voltage coil upper semisection, low-voltage coil lower semisection(2-2)Adopt With the right side around to two ends are drawn in the bottom of low-voltage coil lower semisection;Low-voltage coil upper semisection(2-1)And lower semisection(2-2)'s Place end circle in centre(7)Draw respectively its two ends;Low-voltage coil 2 use axial split formula structure, a transformer equivalent to Two transformer station high-voltage side bus, when photovoltaic DC-to-AC converter have one group break down when, due to transformer division reactance it is big, another group can be just Often operation;Low-voltage coil wire uses copper foil, and coil interlayer insulation uses water chestnut lattice point gummed paper, and the glue put on gummed paper melts at high temperature Change, low-voltage coil is solidified togather, can intensifier coil anti-short circuit capability.
As shown in figure 3, described high-tension coil upper semisection(6-1)Using a left side around to head end is drawn in end turn, tap Head and tail end high-tension coil width to extraction;High-tension coil lower semisection(6-2)Using the right side around to head end is under high-tension coil Portion is drawn, tap and tail end high-tension coil width to extraction;High-tension coil upper semisection(6-1)And lower semisection(6-2)It is middle End circle 7 is placed, is drawn after the upper semisection of high-tension coil 6 and the head end of lower semisection, tail end and tap parallel connection.Due to high pressure Coil is used in parallel using two sections, when one group of inverter breaks down, during another group of normal operation, due to(2-1)With(6-2)Or (2-2)With(6-1)Between impedance it is big, ensure that the ampere-turn equilibrium of the coil of normal operation.High-tension coil interlayer uses 0.075NW cable insulating papers.The specification cable paper allows field strength high, and dielectric loss is low, can reduce transformer cost, and improving transformer makes Use performance.

Claims (4)

1. a kind of photovoltaic transformer, including iron core and the coil that is arranged on iron core, iron core(1)Outside is wound with low-voltage coil, Low-voltage coil(2)Periphery sets heat radiation oil duct(3), heat radiation oil duct outside is provided with ground screen(4);Ground screen(4)Outside is provided with main oil gallery (5), main oil gallery outside is provided with high-tension coil(6), it is characterized in that:Described low-voltage coil and high-tension coil be divided into upper semisection and Lower semisection;Low-voltage coil upper semisection(2-1)Using a left side around to two ends are drawn in low-voltage coil upper semisection, low-voltage coil lower half Section(2-2)Using the right side around to two ends are drawn in low-voltage coil lower half pars infrasegmentalis;The centre of low-voltage coil upper semisection and lower semisection Place end circle(7)Draw respectively its two ends;Described high-tension coil upper semisection(6-1)Using a left side around to head end is in coil-end Portion is drawn, tap and tail end high-tension coil width to extraction;High-tension coil lower semisection(6-2)Using the right side around to head end exists The bottom of high-tension coil is drawn, tap and tail end high-tension coil width to extraction;In high-tension coil upper semisection and lower semisection Between place end circle(7)Drawn after the head end of its upper semisection and lower semisection, tail end and tap parallel connection.
2. the photovoltaic transformer according to claim 1, it is characterized in that:Described high-tension coil(6)Upper semisection and under Half section of two ends are in parallel to draw, and high-tension coil interlayer uses 0.075NW cable insulating papers.
3. the photovoltaic transformer according to claim 1, it is characterized in that:Described ground screen(4)It is exhausted using 3 layers of 0.075NW Edge cable paper, ground screen(4)With main oil gallery(5)Between place 2 layers of 0.075NW cable insulating papers.
4. the photovoltaic transformer according to claim 1, it is characterized in that:Described low-voltage coil uses axial split formula knot Structure, low-voltage coil interlayer use water chestnut lattice point gummed paper.
CN201720571960.2U 2017-05-22 2017-05-22 Photovoltaic transformer Expired - Fee Related CN206819862U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720571960.2U CN206819862U (en) 2017-05-22 2017-05-22 Photovoltaic transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720571960.2U CN206819862U (en) 2017-05-22 2017-05-22 Photovoltaic transformer

Publications (1)

Publication Number Publication Date
CN206819862U true CN206819862U (en) 2017-12-29

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Application Number Title Priority Date Filing Date
CN201720571960.2U Expired - Fee Related CN206819862U (en) 2017-05-22 2017-05-22 Photovoltaic transformer

Country Status (1)

Country Link
CN (1) CN206819862U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110706902A (en) * 2019-09-28 2020-01-17 山东达驰驰翔电气有限公司 Wind energy and solar energy power generation transformer
CN113990633A (en) * 2021-09-27 2022-01-28 重庆泰昇智能电气有限公司 Transformer high-voltage coil and winding method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110706902A (en) * 2019-09-28 2020-01-17 山东达驰驰翔电气有限公司 Wind energy and solar energy power generation transformer
CN113990633A (en) * 2021-09-27 2022-01-28 重庆泰昇智能电气有限公司 Transformer high-voltage coil and winding method thereof
CN113990633B (en) * 2021-09-27 2024-08-02 重庆泰昇智能电气有限公司 High-voltage coil of transformer and winding method thereof

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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20171229

Termination date: 20210522