CN203746639U - Line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer - Google Patents

Line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer Download PDF

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Publication number
CN203746639U
CN203746639U CN201420102629.2U CN201420102629U CN203746639U CN 203746639 U CN203746639 U CN 203746639U CN 201420102629 U CN201420102629 U CN 201420102629U CN 203746639 U CN203746639 U CN 203746639U
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CN
China
Prior art keywords
winding
phase
line
terminal
load voltage
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Withdrawn - After Issue
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CN201420102629.2U
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Chinese (zh)
Inventor
董景义
刘洁
李西勇
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Shandong Dachi Electric Co Ltd
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Shandong Dachi Electric Co Ltd
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Priority to CN201420102629.2U priority Critical patent/CN203746639U/en
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Publication of CN203746639U publication Critical patent/CN203746639U/en
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Withdrawn - After Issue legal-status Critical Current

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Abstract

The utility model relates to a transformer and in particular relates to a line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer. The line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer comprises a main core limb and bypass core limbs; a high-voltage winding, a medium-voltage winding and a low-voltage winding sleeve the main core limb; an exciting winding and a regulating winding sleeve one bypass core limb; the line terminal of the high-voltage winding is connected with the regulating winding by use of a lead; the low-voltage winding is connected in parallel with the exciting winding by use of a lead; an on-load voltage regulating tap switch is arranged at one side of the bypass core limb with the regulating winding. The line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer is reasonable in structure, convenient for line leading, high in reliability and excellent in performance indexes, and the suspension-end oscillatory potential of the regulating winding low and controllable, and therefore, the line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer is applicable to the design of 145kV-330kV line-terminal l on-load voltage regulating single-phase high-impedance transformers; the transformers are capable of safely and reliably running in a power grid system of which a high-voltage neutral point is not directly earthed.

Description

The single-phase 220kV high-impedance transformer of a kind of line end on-load voltage regulation
(1) technical field
The utility model relates to a kind of transformer, particularly the single-phase 220kV high-impedance transformer of a kind of line end on-load voltage regulation.
(2) background technology
Along with developing rapidly of national economy, electric power transmission network is increasingly sophisticated, the fail safe during in order to ensure power system operation, reliability, and power consumer is also more and more higher to the requirement of power transformer product.Sometimes be subject to the restriction in energy centre or load center geographical position, usually transformer station is arranged in to the poor remote mountain areas of transportation condition, at this moment transportation clearance and the hauled weight of power consumer to power transformer product can propose strict requirement, according to conventional method for designing, make originally can be designed to the power transformer product of Integral three-phase, be subject to the restriction of transportation condition, must be designed to single-phase transformer, more very it, transformer mainly need be organized after parts are transported to separately erecting bed and be assembled again, this is by man power and materials a large amount of cost, and the quality of product is difficult for ensureing.Sometimes in order to improve the anti-short circuit capability of product, to the impedance voltage numerical value proposed requirement of power transformer product,, far beyond the category of GB/T6451-2008 defined, call it by the fine-sounding name of: high-impedance electric power transformer.The ability of sometimes bearing atmospheric over-voltage and switching overvoltage in order to improve the pressure regulation winding of the power transformer using in non-direct ground system and shunting switch, power transformer user requires to adopt high pressure line end voltage regulating mode; Sometimes power consumer, in order to improve power transmission efficiency, usually requires the no-load loss of power transformer and load loss numeric ratio GB/T 6451-2008 setting much lower, etc.
For these reasons, transformer equipment manufactory, if do not take more advanced design concept, not only the manufacturing cost of product can significantly rise, and sometimes can not meet the demand of power consumer completely, final enterprise will be eliminated in this cruel competition of market economy.
(3) summary of the invention
The utility model is in order to make up the defect of prior art, provide a kind of rational in infrastructure, lead-in wire is convenient, reliability is high, performance index are superior, pressure regulation winding suspension end oscillation potential is low and controlled, the single-phase 220kV high-impedance transformer of line end on-load voltage regulation that can meet consumers' demand.
The utility model is achieved by the following technical solution:
The single-phase 220kV high-impedance transformer of a kind of line end on-load voltage regulation, comprise two iron core side poles of a principal post unshakable in one's determination and apportion principal post unshakable in one's determination both sides, it is characterized in that, on described principal post unshakable in one's determination, cover has high pressure winding, middle pressure winding and low pressure winding successively from inside to outside, on one of them iron core side pole, cover has field winding and pressure regulation winding successively from inside to outside, the line end of high pressure winding is connected with pressure regulation winding by lead-in wire, low pressure winding is connected in parallel by lead-in wire and field winding, and cover has a side of the iron core side pole of pressure regulation winding to be furnished with on-load tap changer.
The cross-sectional area of described iron core side pole is 50%~60% of principal post unshakable in one's determination.
The beneficial effects of the utility model are:
The utility model is rational in infrastructure, lead-in wire is convenient, reliability is high, performance index are superior, pressure regulation winding suspension end oscillation potential is low and controlled, can meet user's demand, be applicable to the design of 145kV~330kV line end on-load voltage regulation single-phase high-impedance transformer, such transformer can operate in the network system of high pressure neutral point indirect earthing safely, reliably; It has successfully solved traditional structure in existing difficult problems in aspect such as insulation, lead-in wires, for exploitation high impedance, low loss transformer specially disclose a kind of brand-new design concept.
(4) brief description of the drawings
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is the layout plan of each winding of the present utility model and switch;
Fig. 2 is elementary diagram of the present utility model.
In figure, 1 principal post unshakable in one's determination, 2 iron core side poles, 3 high pressure windings, press winding, 5 low pressure windings, 6 field windings, 7 pressure regulation windings, 8 on-load tap changers in 4.
(5) embodiment
Accompanying drawing is specific embodiment of the utility model.As Fig. 1, shown in Fig. 2, this kind of single-phase 220kV high-impedance transformer of line end on-load voltage regulation, the core construction of the type transformer is selected single-phase three pillar type structure, its core limb is divided into a principal post 1 unshakable in one's determination and two iron core side poles 2, wherein the cross-sectional area of iron core side pole 2 is 50%~56% of principal post 1 cross-sectional area unshakable in one's determination, concrete numerical value can be according to no-load loss, no-load current, the parameters such as noise size are determined, two iron core side pole 2 apportions principal post unshakable in one's determination 1 both sides, on principal post 1 unshakable in one's determination, cover has high pressure winding 3 successively from inside to outside, middle pressure winding 4 and low pressure winding 5, on one of them iron core side pole 2, cover has field winding 6 and pressure regulation winding 7 successively from inside to outside, the line end of high pressure winding 3 is connected with pressure regulation winding 7 according to elementary diagram as shown in Figure 2 by lead-in wire, low pressure winding 5 is connected in parallel according to elementary diagram and field winding 6 as shown in Figure 2 by lead-in wire, cover has a side of the iron core side pole 2 of pressure regulation winding 7 to be furnished with on-load tap changer 8, on-load tap changer 8 connects according to elementary diagram as shown in Figure 2.
Except technical characterictic described in specification, all the other technical characterictics are those skilled in the art's known technology.

Claims (2)

1. the single-phase 220kV high-impedance transformer of line end on-load voltage regulation, comprise two iron core side poles (2) of a principal post unshakable in one's determination (1) and apportion principal post (1) unshakable in one's determination both sides, it is characterized in that, on described principal post unshakable in one's determination (1), cover has high pressure winding (3) successively from inside to outside, middle pressure winding (4) and low pressure winding (5), on one of them iron core side pole (2), cover has field winding (6) and pressure regulation winding (7) successively from inside to outside, the line end of high pressure winding (3) is connected with pressure regulation winding (7) by lead-in wire, low pressure winding (5) is connected in parallel by lead-in wire and field winding (6), cover has a side of the iron core side pole (2) of pressure regulation winding (7) to be furnished with on-load tap changer (8).
2. the single-phase 220kV high-impedance transformer of line end on-load voltage regulation according to claim 1, is characterized in that, the cross-sectional area of described iron core side pole (2) is 50%~56% of principal post unshakable in one's determination (1).
CN201420102629.2U 2014-03-07 2014-03-07 Line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer Withdrawn - After Issue CN203746639U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420102629.2U CN203746639U (en) 2014-03-07 2014-03-07 Line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420102629.2U CN203746639U (en) 2014-03-07 2014-03-07 Line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer

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Publication Number Publication Date
CN203746639U true CN203746639U (en) 2014-07-30

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CN201420102629.2U Withdrawn - After Issue CN203746639U (en) 2014-03-07 2014-03-07 Line-terminal on-load voltage regulating single-phase 220kV high-impedance transformer

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103794343A (en) * 2014-03-07 2014-05-14 山东达驰电气有限公司 End terminal on-load voltage regulation single-phase 220 kV high-impedance transformer
CN112951560A (en) * 2021-03-22 2021-06-11 保定天威保变电气股份有限公司 Single-phase generator transformer with variable low-voltage rated voltage and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103794343A (en) * 2014-03-07 2014-05-14 山东达驰电气有限公司 End terminal on-load voltage regulation single-phase 220 kV high-impedance transformer
CN103794343B (en) * 2014-03-07 2016-08-17 山东达驰电气有限公司 A kind of line end on-load voltage regulation single-phase 220kV high-impedance transformer
CN112951560A (en) * 2021-03-22 2021-06-11 保定天威保变电气股份有限公司 Single-phase generator transformer with variable low-voltage rated voltage and method

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GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20140730

Effective date of abandoning: 20160817

C25 Abandonment of patent right or utility model to avoid double patenting