CN102136354A - Large-range on-load tap changer (OLTC) for testing - Google Patents
Large-range on-load tap changer (OLTC) for testing Download PDFInfo
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- CN102136354A CN102136354A CN 201010590948 CN201010590948A CN102136354A CN 102136354 A CN102136354 A CN 102136354A CN 201010590948 CN201010590948 CN 201010590948 CN 201010590948 A CN201010590948 A CN 201010590948A CN 102136354 A CN102136354 A CN 102136354A
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Abstract
The invention discloses a large-range on-load tap changer (OLTC) for testing. Each phase winding comprises a low-voltage winding, a high-voltage winding and a regulating winding from inside to outside in sequence, wherein the low-voltage winding is axially led out; the high-voltage winding is divided into an upper half high-voltage winding and a lower half high-voltage winding; the four leading-out heads of the high-voltage winding are radially led out; the regulating winding is divided into upper and lower same parts; three-phase serial-parallel off-circuit tap changers DTC2 are connected between the beginning outgoing lines H4 and H2 as well as between the end outgoing lines H3 and H1 of the upper half high-voltage winding and the lower half high-voltage winding; a three-phase off-circuit tap changer DTC1 is connected between the end outgoing line of the lower half high-voltage winding and the regulating winding; and a positive and negative OLTC is installed on the regulating winding. The OLTC for testing has the following beneficial effects: low-voltage powering up can be smoothly realized by using one OLTC; the high voltage is output in the range from 2598V to 145492V; and the problem that the OLTC impedance in some tapping positions, which are close to the minimum tapping portion, of the OLTC is high is solved.
Description
Technical field
The present invention relates to a kind of load tapchanging testing transformer on a large scale, belong to the transformer technology field.
Background technology
Development along with power technology, the change in voltage scope of power transformer is increasing, therefore the change in voltage area requirement of the testing transformer that power transformer is tested is also increasing, has to dispose the test requirements document that many testing transformers could satisfy the power transformer of different levels thereby caused.
In order to adapt to above requirement, realize that by transformer the demand of the testing transformer of voltage pressure regulation on a large scale put on schedule, and the manufacture difficulty of this transformer is: range of regulation is big, tap position is many, the impedance voltage of transformer significantly increases under the approaching several operating voltages of minimum tap (minimum operating voltage) of transformer, even reached 170%, can not satisfy normal transformer test work.
Summary of the invention
Purpose of the present invention solves the above-mentioned problems in the prior art exactly, provides that a kind of range of regulation is big, tap position is many, and the impedance voltage of transformer can satisfy the load tapchanging testing transformer of normal test requirements document on a large scale.
For realizing purpose of the present invention, technical solution of the present invention is: a kind of load tapchanging on a large scale testing transformer, and its every phase winding is made of low pressure winding, high pressure winding, pressure regulation winding from inside to outside successively; The low pressure winding adopts and axially draws; The high pressure winding is divided into high pressure the first half winding and high pressure the latter half winding, lifts one's head the width of cloth to drawing for its four; The pressure regulation winding is divided into identical upper and lower two parts; Connecting three between top outlet H4, the H2 of high pressure the first half winding and the latter half winding and end position outlet H3, H1 is in series-conversion off circuit tap changer DTC2 in parallel, under high pressure connecting three-phase between the end position outlet of half part winding and the pressure regulation winding does not have excitation tap change over switch DTC1, and positive and negative accent on-load tap changer OLTC is installed on the pressure regulation winding.
Above-mentioned described three be in series-terminal 4 of conversion off circuit tap changer DTC2 in parallel links to each other with high pressure the first half winding top outlet H4, the terminal 2 of DTC2 links to each other with high pressure the latter half winding top outlet H2, the terminal 3 of DTC2 links to each other with high pressure the first half winding end position outlet H3, and the joint 1 of DTC2 links to each other with high pressure the latter half winding end position outlet H1; The terminal 1 of no excitation tap change over switch DTC1 links to each other with high pressure the first half winding top outlet H4, and the terminal 2 of DTC1 links to each other with the terminal K of positive and negative accent on-load tap changer OLTC, and the terminal 3 of DTC1 links to each other with high pressure the latter half winding end position outlet H1; Each joint of positive and negative accent on-load tap changer OLTC links to each other with each lead-out wire of pressure regulation winding respectively.
Testing transformer high pressure winding of the present invention adopts one three and is in series-and conversion off circuit tap changer DTC2 in parallel realizes the series, parallel conversion of high pressure principal tapping, thereby high pressure principal tapping voltage is realized the variation of twice, realize that in conjunction with a positive and negative accent on-load tap changer OLTC testing transformer low pressure powers up the purpose of high tension voltage wide variation simultaneously.In order to solve the problem that approaching minimum tap position transformer impedance that this structure causes increases substantially, this testing transformer is introduced a three-phase does not again have excitation tap change over switch DTC1, when several tapping voltage at the approaching minimum tap position place of service test transformer, there is not excitation tap change over switch DTC1 with transformer high-voltage main winding complete resection by this three-phase, realize small voltage by pressure regulation winding and the operation of low pressure winding two windings, low-impedance output, well solved transformer near several operating voltages of minimum tap that is minimum operating voltage under the problem that increases substantially of the impedance voltage of transformer, satisfied normal test requirements document.The testing transformer that adopts the technology of the present invention to make just can realize smoothly that with one low pressure powers up, and high pressure is from the output on a large scale of 2598V～145492V, and has solved the big problem of several tap position transformer impedances at the approaching minimum tap place of transformer.It is simple in structure, and cost is low, and is easy to make.
Description of drawings
Fig. 1 is the distributed architecture schematic diagram between iron core, low pressure winding, high pressure winding and the pressure regulation winding of a phase wherein in the three-phase among the present invention;
Among the figure: 111 is unshakable in one's determination, 112 is the low pressure winding, and 114 is high pressure the first half winding, and 115 are pressure regulation the first half winding, 116 are pressure regulation the latter half winding, 117 is high pressure the latter half winding, and 113 is the axial outlet in low pressure winding upper end, and 118 is the axial outlet in low pressure winding bottom, H3 is the position outlet of high pressure the first half winding end, H4 is the top outlet of high pressure the first half winding, and H2 is the top outlet of high pressure the latter half winding, and H1 is the position outlet of high pressure the latter half winding end.
Fig. 2 is an elementary diagram of the present invention.
Among the figure: DTC2 three is in series-conversion off circuit tap changer in parallel, and DTC1 is that three-phase does not have excitation tap change over switch, and OLTC is positive and negative accent on-load tap changer.
Table 1 and table 2 do not have the explanation of excitation tap change over switch pressure regulation position for three being in series of describing in conjunction with Fig. 2-conversion off circuit tap changer in parallel, positive and negative accent on-load tap changer, three-phase.
Embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
That testing transformer as shown in Figure 1 and Figure 2, every phase A, B, C comprise respectively is unshakable in one's determination 111, low pressure winding 112, high pressure winding, pressure regulation winding, three are in series-conversion off circuit tap changer DTC2 in parallel, three-phase do not have excitation tap change over switch DTC1, positive and negative accent on-load tap changer OLTC and form.Every phase winding is followed successively by low pressure winding 112, high pressure winding and pressure regulation winding from inside to outside.Low pressure winding 112 adopts axially draws, and 113 is the axial outlet in low pressure winding upper end, and 118 is the axial outlet in low pressure winding bottom.The high pressure winding is divided into high pressure the first half winding 114 and high pressure the latter half winding 117, lift one's head the width of cloth to drawing for its four, high pressure the first half winding end position outlet H3, high pressure the first half winding top outlet H4, high pressure the latter half winding end position outlet H1, high pressure the latter half winding top outlet H2.The pressure regulation winding is divided into identical upper and lower two parts: pressure regulation the first half winding 115 and pressure regulation the latter half winding 116.Three be in series-terminal 4 of conversion off circuit tap changer DTC2 in parallel links to each other with high pressure the first half winding top outlet H4, the terminal 2 of DTC2 links to each other with high pressure the latter half winding top outlet H2, the terminal 3 of DTC2 links to each other with high pressure the first half winding end position outlet H3, and the joint 1 of DTC2 links to each other with high pressure the latter half winding end position outlet H1; The terminal 1 that three-phase does not have excitation tap change over switch DTC1 links to each other with high pressure the first half winding top outlet H4, the terminal 2 of DTC1 links to each other with the terminal K of positive and negative accent on-load tap changer OLTC, and the terminal 3 of DTC1 links to each other with high pressure the latter half winding end position outlet H1; Each joint of positive and negative accent on-load tap changer OLTC links to each other with each lead-out wire of pressure regulation winding respectively.
Table 1
Table 2
As shown in Table 1 and Table 2, when three among Fig. 2 be in series-conversion off circuit tap changer DTC2 operating contact in parallel is positioned at 2-3,3-0 coupled position, when no excitation tap change over switch DTC1 operating contact is positioned at the 2-3 coupled position, transformer high-voltage the first half winding 114 and high pressure the latter half winding 117 are in the series operation state, can realize the conversion of the high pressure 62354～145492V voltage in the table 1 by the positive and negative accent on-load tap changer OLTC among adjusting Fig. 2.When three among Fig. 2 be in series-when conversion off circuit tap changer DTC2 operating contact in parallel is positioned at 2-4,1-3 coupled position, three-phase and does not have excitation tap change over switch DTC1 operating contact and be positioned at the 2-3 coupled position, transformer high-voltage the first half winding 114 and high pressure the latter half winding 117 are in the parallel running state, can realize the conversion of the high pressure 25981～93531V voltage in the table 2 by the positive and negative accent on-load tap changer OLTC among adjusting Fig. 2.When three-phase among Fig. 2 does not have excitation tap change over switch DTC1 operating contact and is positioned at the 1-2 coupled position, no matter three are in series-and which position conversion off circuit tap changer DTC2 operating contact in parallel be in, the transformer high-voltage winding does not all participate in operation, thereby realized the state of pressure regulation winding and low pressure winding operation, by the positive and negative accent on-load tap changer OLTC among Fig. 2 being adjusted to+conversion of the high pressure 2598～23383V voltage of shelves in can realization table 2, solved the problem of transformer impedance drop sharp increase in this voltage range when introducing not that three-phase does not have excitation tap change over switch DTC1 among Fig. 2 simultaneously.
Certainly; the present invention also has other various embodiments; under the situation of the present invention's spirit and essence; those of ordinary skill in the art can make corresponding change and distortion according to the present invention; but these corresponding changes and distortion all should belong to the improvement of equivalent technologies, belong to the protection range of claim of the present invention.
Claims (2)
1. load tapchanging on a large scale testing transformer, its every phase winding is made of low pressure winding, high pressure winding, pressure regulation winding from inside to outside successively; The low pressure winding adopts and axially draws; The high pressure winding is divided into high pressure the first half winding and high pressure the latter half winding, lifts one's head the width of cloth to drawing for its four; The pressure regulation winding is divided into identical upper and lower two parts; It is characterized in that: between top outlet H4, the H2 of high pressure the first half winding and the latter half winding and end position outlet H3, H1, connect three and be in series-conversion off circuit tap changer DTC2 in parallel, under high pressure connecting three-phase between the end position outlet of half part winding and the pressure regulation winding does not have excitation tap change over switch DTC1, and positive and negative accent on-load tap changer OLTC is installed on the pressure regulation winding.
2. load tapchanging on a large scale testing transformer according to claim 1, it is characterized in that: the terminal 4 of described series connection-parallel connection conversion off circuit tap changer DTC2 links to each other with high pressure the first half winding top outlet H4, the terminal 2 of DTC2 links to each other with high pressure the latter half winding top outlet H2, the terminal 3 of DTC2 links to each other with high pressure the first half winding end position outlet H3, and the joint 1 of DTC2 links to each other with high pressure the latter half winding end position outlet H1; The terminal 1 of no excitation tap change over switch DTC1 links to each other with high pressure the first half winding top outlet H4, and the terminal 2 of DTC1 links to each other with the terminal K of positive and negative accent on-load tap changer OLTC, and the terminal 3 of DTC1 links to each other with high pressure the latter half winding end position outlet H1; Each joint of positive and negative accent on-load tap changer OLTC links to each other with each lead-out wire of pressure regulation winding respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010590948A CN102136354B (en) | 2010-12-16 | 2010-12-16 | Large-range on-load tap changer (OLTC) for testing |
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| CN201010590948A CN102136354B (en) | 2010-12-16 | 2010-12-16 | Large-range on-load tap changer (OLTC) for testing |
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| CN102136354A true CN102136354A (en) | 2011-07-27 |
| CN102136354B CN102136354B (en) | 2012-10-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412056A (en) * | 2011-12-05 | 2012-04-11 | 保定天威集团有限公司 | Voltage-regulating winding structure of splitting winding type on-load tap-changing transformer |
| CN103258629A (en) * | 2013-05-30 | 2013-08-21 | 卧龙电气集团股份有限公司 | Large-capacity oil immersed transformer with six-column iron core |
| CN105529165A (en) * | 2015-10-26 | 2016-04-27 | 浙江江山变压器股份有限公司 | Constant-flux and wide-voltage regulating range intermediate transformer for testing |
| WO2018032893A1 (en) * | 2016-08-18 | 2018-02-22 | 中国电力科学研究院 | Arcless on-load automatic voltage-regulating distribution transformer device and voltage regulation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529886A1 (en) * | 1985-08-21 | 1987-02-26 | Reinhausen Maschf Scheubeck | STAGE TRANSFORMER WITH CENTER TAP |
| CN2100017U (en) * | 1991-09-05 | 1992-03-25 | 锦州变压器厂 | Constant power transformer with voltage regulation under load |
| CN201004369Y (en) * | 2006-12-31 | 2008-01-09 | 西安西电变压器有限责任公司 | Voltage adjusting transformer |
| CN201956180U (en) * | 2010-12-16 | 2011-08-31 | 保定天威集团有限公司 | Large-range loaded voltage regulating transformer for test |
-
2010
- 2010-12-16 CN CN201010590948A patent/CN102136354B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529886A1 (en) * | 1985-08-21 | 1987-02-26 | Reinhausen Maschf Scheubeck | STAGE TRANSFORMER WITH CENTER TAP |
| CN2100017U (en) * | 1991-09-05 | 1992-03-25 | 锦州变压器厂 | Constant power transformer with voltage regulation under load |
| CN201004369Y (en) * | 2006-12-31 | 2008-01-09 | 西安西电变压器有限责任公司 | Voltage adjusting transformer |
| CN201956180U (en) * | 2010-12-16 | 2011-08-31 | 保定天威集团有限公司 | Large-range loaded voltage regulating transformer for test |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412056A (en) * | 2011-12-05 | 2012-04-11 | 保定天威集团有限公司 | Voltage-regulating winding structure of splitting winding type on-load tap-changing transformer |
| CN102412056B (en) * | 2011-12-05 | 2013-06-05 | 保定天威集团有限公司 | Voltage-regulating winding structure of splitting winding type on-load tap-changing transformer |
| CN103258629A (en) * | 2013-05-30 | 2013-08-21 | 卧龙电气集团股份有限公司 | Large-capacity oil immersed transformer with six-column iron core |
| CN103258629B (en) * | 2013-05-30 | 2015-12-30 | 卧龙电气集团股份有限公司 | With the Large Copacity oil-filled transformer of six column iron cores |
| CN105529165A (en) * | 2015-10-26 | 2016-04-27 | 浙江江山变压器股份有限公司 | Constant-flux and wide-voltage regulating range intermediate transformer for testing |
| WO2018032893A1 (en) * | 2016-08-18 | 2018-02-22 | 中国电力科学研究院 | Arcless on-load automatic voltage-regulating distribution transformer device and voltage regulation method thereof |
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| Publication number | Publication date |
|---|---|
| CN102136354B (en) | 2012-10-24 |
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Owner name: BAODING TIANWEI BAOBIAN ELECTRIC CO., LTD. Free format text: FORMER OWNER: BAODING TIANWEI GROUP CO., LTD. Effective date: 20131129 |
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Free format text: CORRECT: ADDRESS; FROM: 071051 BAODING, HEBEI PROVINCE TO: 071056 BAODING, HEBEI PROVINCE |
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Effective date of registration: 20131129 Address after: 071056 West Road, Hebei, Baoding, No. 2222, No. Patentee after: Baoding Tianwei Baobian Electric Co., Ltd. Address before: 071051 Jin Di garden complex building, 128 chemical fiber road north, Baoding, Hebei Patentee before: Baoding Tianwei Group Co., Ltd. |