CN103515071A - High-voltage coarse and fine regulation on-load voltage regulation power transformer - Google Patents
High-voltage coarse and fine regulation on-load voltage regulation power transformer Download PDFInfo
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- CN103515071A CN103515071A CN201310433087.7A CN201310433087A CN103515071A CN 103515071 A CN103515071 A CN 103515071A CN 201310433087 A CN201310433087 A CN 201310433087A CN 103515071 A CN103515071 A CN 103515071A
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Abstract
The invention relates to a high-voltage coarse and fine regulation on-load voltage regulation power transformer, and belongs to the technical field of transformers. According to the technical scheme, each phase of winding sequentially comprises a transformer iron core (18), a low-voltage winding (19), a high-voltage winding with a voltage coarse regulating line disc and a multi-level voltage fine regulation winding, wherein the low-voltage winding adopts an axial lead-out head, the high-voltage winding with the voltage coarse regulating line disc adopts an upper part and a lower part which are identical and connected with six lead-out heads in parallel, the multi-level voltage fine regulation winding adopts an upper part and a lower part which are identical and connected with a plurality of tapping lead-out heads in parallel. Coarse and fine voltage regulation variation of the on-load voltage regulation power transformer is achieved through the high-voltage winding with the voltage coarse regulating line disc, the multi-level voltage fine regulation winding (line disc) and the coarse and fine regulation on-load voltage regulation tap switch, so that load losses in the positions of maximum tapping, rated tapping and minimum tapping of the transformer are basically identical, the number of heat radiators of the transformer is reduced, the cost of the transformer is reduced, and the operation cost of the transformer is also reduced.
Description
Technical field
The present invention relates to a kind of high pressure raw fine tuning loaded voltage-regulating electric transformer, belong to transformer technology field.
Background technology
Along with the development of power technology and improving constantly power quality, loaded voltage-regulating electric transformer can bringing onto load pressure regulation with it advantage progressively replace non-excitation pressure adjustment power transformer, and the loaded voltage-regulating electric transformer of background technology generally all adopts the load tapchanging mode of positive and negative tune, the drawback of this voltage regulating mode is at transformer during in minimum voltage tap position, its electric current is transformer maximum operating currenbt, now the resistance loss of transformer comprises resistance loss two parts of transformer main coil and voltage regulation coil, thereby cause the more specified tap position of its load loss of transformer minimum voltage tap position to increase considerably.Therefore, in order to solve the heat dissipation problem of transformer, and increase radiator, thereby increased transformer cost.
Summary of the invention
The object of this invention is to provide a kind of high pressure raw fine tuning loaded voltage-regulating electric transformer, realize thickness and adjust on-load voltage regulation, make its its load loss of each position in the maximum tap of transformer, specified tap and minimum tap substantially suitable, reduced the quantity of transformer external heat sink, reduce manufacturing cost and the operating cost of transformer, solve the problems referred to above that background technology exists.
Technical scheme of the present invention is: a kind of high pressure raw fine tuning loaded voltage-regulating electric transformer, comprise transformer core, low pressure winding, the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning pressure regulation winding and thickness and adjust on-load tap changer, winding arrangement mode is: every phase winding is followed successively by transformer core, low pressure winding, the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning pressure regulation winding from inside to outside; Low pressure winding adopts axial lead, with six identical of the parallel connections of two parts up and down of the high pressure winding employing of coarse adjustment line pressure regulator cake, lift one's head and draw, lift one's head A, B, the C that adopts head end rear three radial leading-out ends in middle part in parallel to be connected to three-phase transformer for six and go up mutually, multistage fine tuning pressure regulation winding adopts the identical many taps of the parallel connection of two parts up and down to lift one's head and draws; The described high pressure winding with coarse adjustment line pressure regulator cake, its coarse adjustment line pressure regulator cake end is lifted one's head after two-way parallel connection, being connected to thickness adjusts on the positive terminal of on-load tap changer, lifting one's head after (being equivalent to high voltage winding group end and lifting one's head that coarse adjustment line pressure regulator cake head end connects with coarse adjustment line pressure regulator cake), two-way was in parallel in high pressure winding middle part with coarse adjustment line pressure regulator cake, is connected on the negative pole end of thickness tune on-load tap changer; After the identical parallel connection of two parts up and down of multistage fine tuning pressure regulation winding, many taps lift one's head (comprising two ends and each coil contact) by lead-in wire, be connected on each tapping point of thickness tune on-load tap changer respectively.
The present invention is also provided with middle pressure winding, if two winding transformer does not have middle pressure winding; Middle pressure winding is arranged between low pressure winding and the high pressure winding with coarse adjustment line pressure regulator cake.
High voltage winding component with coarse adjustment line pressure regulator cake is identical two parts, with the high pressure winding top of coarse adjustment line pressure regulator cake, divides and divides with the high pressure winding bottom of coarse adjustment line pressure regulator cake; Multistage fine tuning pressure regulation winding is divided into identical two parts, part under part and multistage fine tuning pressure regulation winding on multistage fine tuning pressure regulation winding.
Good effect of the present invention: the present invention adjusts on-load tap changer to realize to loaded voltage-regulating electric transformer the pressure regulation variation that thickness is adjusted by the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning pressure regulation winding (line cake) and thickness, thereby realize at its load loss of each position of the maximum tap of transformer, specified tap and minimum tap substantially suitable, reduce the quantity of transformer radiator, both reduce the cost of transformer self, reduced again the operating cost of transformer.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention one low pressure winding, the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning voltage-regulating winding structure schematic diagram;
Fig. 2 is the embodiment of the present invention two low pressure windings, middle pressure winding, the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning voltage-regulating winding structure schematic diagram;
Fig. 3 is the connection schematic diagram that the high pressure winding of band coarse adjustment line pressure regulator cake of the present invention, multistage fine tuning pressure regulation winding and thickness are adjusted on-load tap changer;
Fig. 4 adjusts the present position of moving contact M and the schematic diagram of output voltage in on-load tap changer to Fig. 3 thickness;
In figure: tap position 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17; Transformer core 18; Low pressure winding 19; Middle pressure winding 20; High pressure winding top with coarse adjustment line pressure regulator cake divides 21; Part 22 on multistage fine tuning pressure regulation winding; Part 23 under multistage fine tuning pressure regulation winding; High pressure winding bottom with coarse adjustment line pressure regulator cake divides 24; The radial leading-out end 25 in middle part; Thickness is adjusted on-load tap changer 26.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention will be further described.
A kind of high pressure raw fine tuning loaded voltage-regulating electric transformer, comprise transformer core 18, low pressure winding 19, the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning pressure regulation winding and thickness and adjust on-load tap changer 26, winding arrangement mode is: every phase winding is followed successively by transformer core, low pressure winding, the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning pressure regulation winding from inside to outside; Low pressure winding adopts axial lead, with six identical of the parallel connections of two parts up and down of the high pressure winding employing of coarse adjustment line pressure regulator cake, lift one's head and draw, lift one's head A, B, the C that adopts the radial leading-out end 25 in head end rear three middle parts in parallel to be connected to three-phase transformer for six and go up mutually, multistage fine tuning pressure regulation winding adopts the identical many taps of the parallel connection of two parts up and down to lift one's head and draws; The described high pressure winding with coarse adjustment line pressure regulator cake, its coarse adjustment line pressure regulator cake end is lifted one's head after two-way parallel connection, being connected to thickness adjusts on the positive terminal of on-load tap changer, lifting one's head after (being equivalent to high voltage winding group end and lifting one's head that coarse adjustment line pressure regulator cake head end connects with coarse adjustment line pressure regulator cake), two-way was in parallel in high pressure winding middle part with coarse adjustment line pressure regulator cake, is connected on the negative pole end of thickness tune on-load tap changer; After the identical parallel connection of two parts up and down of multistage fine tuning pressure regulation winding, many taps lift one's head (comprising two ends and each coil contact) by lead-in wire, be connected on each tapping point of thickness tune on-load tap changer respectively.
The present invention is also provided with middle pressure winding 20, if two winding transformer does not have middle pressure winding; Middle pressure winding is arranged between low pressure winding and the high pressure winding with coarse adjustment line pressure regulator cake.
Embodiment mono-, with reference to accompanying drawing 1; Every phase winding of the present embodiment is followed successively by from inside to outside: transformer core 18, low pressure winding 19, the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning pressure regulation winding, high voltage winding component with coarse adjustment line pressure regulator cake is identical two parts, with the high pressure winding top of coarse adjustment line pressure regulator cake, divides 21 and divide 24 with the high pressure winding bottom of coarse adjustment line pressure regulator cake; Multistage fine tuning pressure regulation winding is divided into identical two parts, part 23 under part 22 and multistage fine tuning pressure regulation winding on multistage fine tuning pressure regulation winding.Low pressure winding 19 adopts axial lead, with the high pressure winding top of coarse adjustment line pressure regulator cake, divide 21 and divide after 24 employing head end parallel connections with the high pressure winding bottom of coarse adjustment line pressure regulator cake, three radial leading-out ends 25 in middle part are connected to the A of three-phase transformer, B, C goes up mutually, the coarse adjustment line pressure regulator cake end of two-way parallel connection lift one's head (+) be connected to thickness and adjust on the positive terminal of on-load tap changer, the high pressure winding middle part of two-way associated coarse adjustment line pressure regulator cake lift one's head (-) (being equivalent to high voltage winding group end and lifting one's head that coarse adjustment line pressure regulator cake head end connects with coarse adjustment line pressure regulator cake) be connected on the negative pole end of thickness tune on-load tap changer, part 23 two-way parallel connection Hou two ends and each coil contact tap positions 1 under part 22 and multistage fine tuning pressure regulation winding on multistage fine tuning pressure regulation winding, 2, 3, 4, 5, 6, 7, 8, 9 are connected to thickness by lead-in wire respectively adjusts on each tapping point of on-load tap changer 26, M is the moving contact that thickness is adjusted on-load tap changer.
Embodiment bis-, with reference to accompanying drawing 2, are provided with middle pressure winding 20, and middle pressure winding is arranged between low pressure winding and the high pressure winding with coarse adjustment line pressure regulator cake.Other is identical with embodiment mono-.
The course of work of the present invention, with reference to accompanying drawing 1, 2, 3, 4, the high tension voltage of take describes as example as 110 ± 8 * 1.25%, with the high pressure umber of turn of coarse adjustment line pressure regulator cake, be set to the number of turn corresponding to rated voltage of transformer, wherein the high pressure umber of turn with coarse adjustment line pressure regulator cake is set to 10% of transformer rated voltage, it is 10% of the whole high pressure umber of turn with coarse adjustment line pressure regulator cake, the total number of turns of multistage fine tuning pressure regulation winding is set to the number of turn corresponding to 10% voltage of transformer rated voltage, from Fig. 1, Fig. 2, Fig. 3 and Fig. 4 can find out the operating state of this transformer, when being positioned at "-" and M from 9 → 1 conversion, can realize tap position eight grades of conversion of minimum tapping voltage 99kV → rated voltage 110kV, now be equivalent to account for the high pressure winding and the multistage fine tuning pressure regulation of the transformer winding work that accounts for 10% rated voltage of the transformer belt coarse adjustment line pressure regulator cake of 90% rated voltage, when tap position is positioned at "+" and M from 9 → 1 conversion, can realize eight grades of conversion of specified tapping voltage 110kV → maximum tapping voltage 121kV, now be equivalent to account for the high pressure winding and the multistage fine tuning pressure regulation of the transformer winding work that accounts for 10% rated voltage of the transformer belt coarse adjustment line pressure regulator cake of 100% rated voltage, from Fig. 4, can find out simultaneously, transformer is connected to San Ge position for specified minute, " 9a " ,“9b” serve as reasons position high pressure winding and the multistage fine tuning pressure regulation of the transformer winding work ，“9c” position that accounts for 10% rated voltage of the transformer belt coarse adjustment line pressure regulator cake that accounts for 90% rated voltage serve as reasons the high pressure winding and the multistage fine tuning pressure regulation of the transformer winding work that accounts for 10% rated voltage of the transformer belt coarse adjustment line pressure regulator cake that accounts for 90% rated voltage.
From the transformer working method of above enforcement, can find out, be with the positive and negative tune voltage regulating mode of background technology difference: under transformer minus tapping state, transformer is by accounting for the 90% high pressure winding wire cake with coarse adjustment line pressure regulator cake and the multistage fine tuning pressure regulation of transformer winding (line cake) work that accounts for 10% rated voltage, rather than the transformer high-voltage winding of 100% rated voltage of positive and negative tune mode and the transformer fine tuning pressure regulation winding that the accounts for 10% rated voltage work of playing a reversed role, under minimum tap state, adopting thickness to adjust mode Transformer Winding working method is to account for the 90% high pressure winding wire cake with coarse adjustment line pressure regulator cake in work, and the transformer high-voltage winding that positive and negative tune mode is 100% rated voltage is worked with the transformer fine tuning pressure regulation winding that accounts for 10% rated voltage simultaneously, be equivalent to the corresponding number of turn of 110% rated voltage in operation, both contrasts, thickness is adjusted than the few 110%-90%=20% of positive and negative tune mode winding working turns, therefore its minimum tapping loss thickness is adjusted and is reduced 20% than positive and negative tune mode simultaneously, therefore, thickness adjusts the transformer of mode to reduce loss, reduced the quantity of radiator, thereby not only reduced the cost of transformer self, also reduced the operating cost of transformer.
Claims (3)
1. a high pressure raw fine tuning loaded voltage-regulating electric transformer, it is characterized in that: comprise transformer core (18), low pressure winding (19), the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning pressure regulation winding and thickness and adjust on-load tap changer (26), winding arrangement mode is: every phase winding is followed successively by transformer core, low pressure winding, the high pressure winding with coarse adjustment line pressure regulator cake, multistage fine tuning pressure regulation winding from inside to outside; Low pressure winding adopts axial lead, with six identical of the parallel connections of two parts up and down of the high pressure winding employing of coarse adjustment line pressure regulator cake, lift one's head and draw, lift one's head A, B, the C that adopts head end rear three radial leading-out ends in middle part in parallel (25) to be connected to three-phase transformer for six and go up mutually, multistage fine tuning pressure regulation winding adopts the identical many taps of the parallel connection of two parts up and down to lift one's head and draws; The described high pressure winding with coarse adjustment line pressure regulator cake, its coarse adjustment line pressure regulator cake end is lifted one's head after two-way parallel connection, being connected to thickness adjusts on the positive terminal of on-load tap changer, lifting one's head after two-way parallel connection in high pressure winding middle part with coarse adjustment line pressure regulator cake, is connected to thickness and adjusts on the negative pole end of on-load tap changer; After the identical parallel connection of two parts up and down of multistage fine tuning pressure regulation winding, many taps are lifted one's head and by lead-in wire, are connected to thickness respectively and adjust on each tapping point of on-load tap changer.
2. a kind of high pressure raw fine tuning loaded voltage-regulating electric transformer according to claim 1, is characterized in that: be also provided with middle pressure winding (20), middle pressure winding is arranged between low pressure winding and the high pressure winding with coarse adjustment line pressure regulator cake.
3. a kind of high pressure raw fine tuning loaded voltage-regulating electric transformer according to claim 1, it is characterized in that: the high voltage winding component with coarse adjustment line pressure regulator cake is identical two parts, with the high pressure winding top of coarse adjustment line pressure regulator cake, divide (21) and divide (24) with the high pressure winding bottom of coarse adjustment line pressure regulator cake; Multistage fine tuning pressure regulation winding is divided into identical two parts, part (23) under part (22) and multistage fine tuning pressure regulation winding on multistage fine tuning pressure regulation winding; With the high pressure winding top of coarse adjustment line pressure regulator cake, divide (21) and divide (24) to adopt after head end parallel connection with the high pressure winding bottom of coarse adjustment line pressure regulator cake, A, B, C that three radial leading-out ends in middle part (25) are connected to three-phase transformer go up mutually.
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| CN201310433087.7A CN103515071B (en) | 2013-09-23 | 2013-09-23 | A kind of high pressure raw fine regulation on-load voltage regulation |
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| CN201310433087.7A CN103515071B (en) | 2013-09-23 | 2013-09-23 | A kind of high pressure raw fine regulation on-load voltage regulation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702435A (en) * | 2014-11-26 | 2016-06-22 | 特变电工衡阳变压器有限公司 | Deicing rectification transformer |
| CN107978439A (en) * | 2018-01-02 | 2018-05-01 | 北华大学 | A kind of winding and pin configuration that can increase ore heat furnace transformer and smelt scope |
| CN109074950A (en) * | 2016-04-25 | 2018-12-21 | 西门子股份公司 | With the high voltage electric equipment adjusted around group |
| CN109727759A (en) * | 2017-10-27 | 2019-05-07 | 特变电工沈阳变压器集团有限公司 | A kind of low reactance height cake formula tap-changing windings |
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| CN2077580U (en) * | 1990-11-01 | 1991-05-22 | 沈阳变压器厂 | Structure of regulatable supervoltage transformer with three windings |
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| CN201698881U (en) * | 2010-02-04 | 2011-01-05 | 中电电气(江苏)股份有限公司 | On-load voltage regulating structure of 110kV power transformer |
| CN101968994A (en) * | 2010-07-16 | 2011-02-09 | 江苏上能变压器有限公司 | Double-ring on-load tap changer with ultrahigh impedance of 110 kV |
| CN103050254A (en) * | 2012-12-24 | 2013-04-17 | 保定天威保变电气股份有限公司 | Single-phase low-voltage double-split transformer with functions of dual high voltage and off-circuit voltage regulation |
| CN103050256A (en) * | 2012-12-24 | 2013-04-17 | 保定天威保变电气股份有限公司 | High-voltage strip coarse-fine voltage adjusting power transformer |
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| CN2077580U (en) * | 1990-11-01 | 1991-05-22 | 沈阳变压器厂 | Structure of regulatable supervoltage transformer with three windings |
| CN201698881U (en) * | 2010-02-04 | 2011-01-05 | 中电电气(江苏)股份有限公司 | On-load voltage regulating structure of 110kV power transformer |
| CN101819854A (en) * | 2010-04-22 | 2010-09-01 | 江西变压器科技股份有限公司 | Tertiary winding multi-stage coarse and fine continuous voltage adjustment rectifier transformer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702435A (en) * | 2014-11-26 | 2016-06-22 | 特变电工衡阳变压器有限公司 | Deicing rectification transformer |
| CN105702435B (en) * | 2014-11-26 | 2019-01-08 | 特变电工衡阳变压器有限公司 | A kind of ice-melt rectifier transformer |
| CN109074950A (en) * | 2016-04-25 | 2018-12-21 | 西门子股份公司 | With the high voltage electric equipment adjusted around group |
| CN109074950B (en) * | 2016-04-25 | 2021-10-15 | 西门子股份公司 | High-voltage electrical device with regulating winding group |
| CN109727759A (en) * | 2017-10-27 | 2019-05-07 | 特变电工沈阳变压器集团有限公司 | A kind of low reactance height cake formula tap-changing windings |
| CN109727759B (en) * | 2017-10-27 | 2021-10-22 | 特变电工沈阳变压器集团有限公司 | Low-reactance height cake type voltage regulating winding |
| CN107978439A (en) * | 2018-01-02 | 2018-05-01 | 北华大学 | A kind of winding and pin configuration that can increase ore heat furnace transformer and smelt scope |
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| Publication number | Publication date |
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| CN103515071B (en) | 2015-09-02 |
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