CN111816428A - 220KV three-winding medium-voltage dual-voltage transformer lead structure - Google Patents
220KV three-winding medium-voltage dual-voltage transformer lead structure Download PDFInfo
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- CN111816428A CN111816428A CN202010570822.9A CN202010570822A CN111816428A CN 111816428 A CN111816428 A CN 111816428A CN 202010570822 A CN202010570822 A CN 202010570822A CN 111816428 A CN111816428 A CN 111816428A
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- 238000004804 winding Methods 0.000 title claims abstract description 17
- 230000005284 excitation Effects 0.000 claims abstract description 24
- 239000002023 wood Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000010079 rubber tapping Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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Abstract
The invention relates to a 220KV three-winding medium-voltage double-voltage transformer lead structure.A medium voltage of a transformer is a first medium-voltage coil and a second medium-voltage coil which are split in a double mode, and a tail end of the first medium-voltage coil, a head end connecting wire of the second medium-voltage coil and a tail end connecting wire of the second medium-voltage coil are led to a non-excitation switch; leading a current leading-out end of the non-excitation switch to a medium-voltage zero-phase sleeve through a medium-voltage zero-phase line; the medium voltage phase line is led to the medium voltage bushing. The conversion of two kinds of voltage in the transformer is realized through the conversion of the non-excitation switch contact. The invention realizes the double-voltage conversion of the medium voltage through the non-excitation switch, has convenient operation, low load loss of the transformer when the medium voltage operates in two voltage states, unchanged connection group after the medium voltage is converted in the two voltages, changed proportion of tapping voltage, reasonable arrangement of ampere turns of the winding of the transformer and strong short-circuit resistance.
Description
Technical Field
The invention belongs to the technical field of transformer production and manufacturing, and particularly relates to a novel 220kV three-winding medium-voltage dual-voltage transformer lead structure.
Background
With the technology of transformer products becoming mature day by day and the market competition becoming fierce day by day, various manufacturers strive to broaden the market of transformers, the conventional 220kV transformers cannot meet all the requirements of the market, the transformers with wider research and development and manufacture performances are researched, and the development of novel medium-voltage dual-voltage transformers is imperative according to the market requirements.
Disclosure of Invention
In order to meet the requirement of medium-voltage and double-voltage transformers, the invention aims to design a novel 220KV three-winding medium-voltage and double-voltage transformer lead structure. The improved novel structure of the invention is as follows:
a220 KV three-winding medium-voltage double-voltage transformer lead structure is characterized in that the medium voltage of a transformer is a first medium-voltage coil and a second medium-voltage coil which are split in a double mode, and the tail end of the first medium-voltage coil, the head end of the second medium-voltage coil and the tail end of the second medium-voltage coil are connected to a non-excitation switch; leading a current leading-out end of the non-excitation switch to a medium-voltage zero-phase sleeve through a medium-voltage zero-phase line; the medium voltage phase line is led to the medium voltage bushing. The conversion of two kinds of voltage in the transformer is realized through the conversion of the non-excitation switch contact. And fixing the tail connecting line and the low-voltage phase line of the low-voltage coil by vertically clamping the wood piece through the lead of the low-voltage coil, so that the wood piece is led to the low-voltage sleeve along the vertical clamping of the lead of the low-voltage coil.
Preferably, the wood piece is clamped through the middle-pressure lower connecting wire, and the tail end of the first middle-pressure coil and the head connecting wire of the second middle-pressure coil are fixed to be horizontally wired along the position of the iron core lower clamping piece and led to the non-excitation switch.
Preferably, the tail ends 2X1, 2Y1 and 2Z1 of the first medium voltage coil are respectively connected with the head ends 2U2, 2V2 and 2W2 of the second medium voltage coil through the tail end connecting wire of the first medium voltage coil and the head end connecting wire of the second medium voltage coil, and the tail ends are led to the non-excitation switch after being connected.
Preferably, the tail end of the second medium-voltage coil is connected with a wire, the wood piece is clamped through the medium-voltage upper connecting wire, the wire is horizontally arranged along the position of the clamping piece on the iron core, and the wire is led to the non-excitation switch.
Preferably, the tail ends 2X2, 2Y2, 2Z2 of the second medium voltage coil are connected to the non-excited switch by tail end connection of the second medium voltage coil.
Preferably, the non-excited switch is supported by a non-excited switch support frame.
Preferably, the medium voltage phase line is routed vertically along the clip position on the core to the medium voltage bushing.
Preferably, the head 2U1, 2V1, 2W1 of the first medium voltage coil is connected to the medium voltage bushing by means of a medium voltage phase line.
The invention has the beneficial effects that:
the invention realizes the double-voltage conversion of the medium voltage through the non-excitation switch, has convenient operation, low load loss of the transformer when the medium voltage operates in two voltage states, unchanged connection group after the medium voltage is converted in the two voltages, changed proportion of tapping voltage, reasonable arrangement of ampere turns of the winding of the transformer and strong short-circuit resistance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are specific embodiments of the invention, and that other drawings within the scope of the present application can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic diagram of a lead structure of a medium-low voltage coil of a medium-voltage dual-voltage transformer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the medium voltage and voltage regulating wiring principle of the medium voltage dual voltage transformer according to the embodiment of the present invention;
in the figure, 1-a middle-voltage lower connecting wire clamping wood piece, 2-a middle-voltage upper connecting wire clamping wood piece, 3-a first middle-voltage coil, 4-a second middle-voltage coil, 5-a tail end of the first middle-voltage coil and a head end connecting wire of the second middle-voltage coil, 6-a non-excitation switch supporting frame, 7-a middle-voltage zero-phase line, 8-a non-excitation switch, 9-a middle-voltage phase line, 10-a tail end connecting wire of the second middle-voltage coil, 11-an iron core upper clamping piece and 12-an iron core lower clamping piece.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a lead structure of a medium-low voltage coil of a medium-voltage dual-voltage transformer according to an embodiment of the present invention. A220 KV three-winding medium-voltage double-voltage transformer lead structure is characterized in that a wood piece 1 is clamped through a medium-voltage lower connecting line, and a tail end of a first medium-voltage coil and a head connecting line 5 of a second medium-voltage coil are fixed to be horizontally wired along an iron core lower clamping piece 12 and led to a non-excitation switch 8. The tail ends 2X1, 2Y1 and 2Z1 of the first medium voltage coil 3 are respectively connected with the head ends 2U2, 2V2 and 2W2 of the second medium voltage coil 4 through the tail end of the first medium voltage coil and the head end connecting wire 5 of the second medium voltage coil, and the tail ends are led to the non-excitation switch 8 after the connection is finished. And clamping the wood piece 2 by a tail connecting wire 10 of the second medium-voltage coil through a medium-voltage upper connecting wire, horizontally wiring along the iron core upper clamping piece 11, and leading to the non-excitation switch 8. The tails 2X2, 2Y2, 2Z2 of the second medium voltage coil 4 are connected to the non-excited switch 8 by the tail connection 10 of the second medium voltage coil.
Supporting the non-excitation switch 8 through a non-excitation switch support frame 6; the current leading-out end of the non-excitation switch 8 is led to the medium-voltage zero-phase sleeve through the medium-voltage zero-phase line 7; the medium voltage phase line 9 is routed vertically along the core upper clamp 11 position to the medium voltage bushing. The head 2U1, 2V1, 2W1 of the first medium voltage coil 3 is connected to the medium voltage bushing by means of the medium voltage phase line 9.
In order to adapt to a lead structure of medium-voltage double-voltage, a wood piece is vertically clamped through a lead of a low-voltage coil, and a tail connecting line and a low-voltage phase line of the low-voltage coil are fixed and led to a low-voltage sleeve along the lead of the low-voltage coil.
Fig. 2 is a schematic diagram of the medium-voltage and voltage-regulating wiring principle of the medium-voltage dual-voltage transformer according to the embodiment of the present invention. The conversion of the medium-voltage two voltages is realized by the conversion of the contacts of the non-excited switch 8 by leading the heads and the tails of the first medium-voltage coil 3 and the second medium-voltage coil 4 to the medium-voltage bushing, the medium-voltage zero-phase bushing and the non-excited switch 8 in the wiring manner of fig. 2. In the figure, 2U1, 2V1 and 2W1 are head numbers of the first medium voltage coil 3, 2X1, 2Y1 and 2Z1 are tail numbers of the first medium voltage coil 3, 2U2, 2V2 and 2W2 are head numbers of the second medium voltage coil 4, 2X2, 2Y2 and 2Z2 are tail numbers of the second medium voltage coil 4, and k is a contact of the non-excitation switch 8.
Finally, it is to be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (8)
1. A220 KV three-winding medium-voltage double-voltage transformer lead structure is characterized in that the medium voltage of a transformer is a first medium-voltage coil (3) and a second medium-voltage coil (4) which are split in two, and the tail end of the first medium-voltage coil, the head end connecting wire (5) of the second medium-voltage coil and the tail end connecting wire (10) of the second medium-voltage coil are led to a non-excitation switch (8); leading the current leading-out end of the non-excitation switch (8) to a medium-voltage zero-phase sleeve through a medium-voltage zero-phase line (7); -leading the medium voltage phase line (9) to the medium voltage bushing; and fixing the tail connecting line and the low-voltage phase line of the low-voltage coil by vertically clamping the wood piece through the lead of the low-voltage coil, so that the wood piece is led to the low-voltage sleeve along the vertical clamping of the lead of the low-voltage coil.
2. A 220kv three-winding medium-voltage dual-voltage transformer lead structure as claimed in claim 1, wherein the tail of the first medium-voltage coil and the head of the second medium-voltage coil (5) are fixed by clamping the wooden piece (1) by the medium-voltage lower connection so as to be horizontally wired along the position of the core lower clamp (12) to the non-excited switch (8).
3. A 220kv three-winding medium-voltage dual-voltage transformer lead structure according to claim 2, characterized in that the tails 2X1, 2Y1, 2Z1 of the first medium-voltage coil (3) are respectively connected with the heads 2U2, 2V2, 2W2 of the second medium-voltage coil (4) through the tail of the first medium-voltage coil and the head of the second medium-voltage coil (5), and the connection is led to the non-excitation switch (8).
4. A 220kv three-winding medium-voltage dual-voltage transformer lead structure according to claim 1, characterized in that the tail end connecting wire (10) of the second medium-voltage coil is horizontally wired along the position of the iron core upper clamping piece (11) by clamping the wooden piece (2) through the medium-voltage upper connecting wire to the non-excitation switch (8).
5. A220 KV three-winding medium-voltage dual-voltage transformer lead structure according to claim 4, characterized in that the tails 2X2, 2Y2, 2Z2 of the second medium-voltage coil (4) are connected to the de-excitation switch (8) by the tail connection (10) of the second medium-voltage coil.
6. A220 KV three-winding medium-voltage dual-voltage transformer lead structure according to any one of claims 1-5, characterized in that the non-excited switch (8) is supported by a non-excited switch support frame (6).
7. A220 KV three-winding medium-voltage dual-voltage transformer lead structure according to claim 6, characterized in that the medium-voltage phase line (9) is routed vertically along the core upper clamp (11) position to the medium-voltage bushing.
8. A220 KV three-winding medium-voltage dual-voltage transformer lead structure according to claim 7, characterized in that the head 2U1, 2V1, 2W1 of the first medium-voltage coil (3) is connected to the medium-voltage bushing by means of the medium-voltage phase line (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010570822.9A CN111816428A (en) | 2020-06-19 | 2020-06-19 | 220KV three-winding medium-voltage dual-voltage transformer lead structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010570822.9A CN111816428A (en) | 2020-06-19 | 2020-06-19 | 220KV three-winding medium-voltage dual-voltage transformer lead structure |
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| CN111816428A true CN111816428A (en) | 2020-10-23 |
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| CN202010570822.9A Pending CN111816428A (en) | 2020-06-19 | 2020-06-19 | 220KV three-winding medium-voltage dual-voltage transformer lead structure |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202134379U (en) * | 2011-07-11 | 2012-02-01 | 申达电气集团有限公司 | Double-voltage convertible transformer |
| CN202352498U (en) * | 2011-11-25 | 2012-07-25 | 保定天威集团有限公司 | Three-winding on-load voltage-regulating step-down transformer with taps at high, medium and low voltage |
| CN103606444A (en) * | 2013-11-28 | 2014-02-26 | 天津天能变压器有限公司 | Multi-winding phase-shifting split dry-type transformer for ship or ocean platform |
| CN106816294A (en) * | 2015-11-30 | 2017-06-09 | 特变电工沈阳变压器集团有限公司 | A kind of pair of high pressure shares a Multifunction transformer for voltage regulation coil |
| CN107134342A (en) * | 2017-05-09 | 2017-09-05 | 山东电力设备有限公司 | A kind of 110kV two-winding transformers pin configuration |
| CN107424806A (en) * | 2017-08-30 | 2017-12-01 | 正泰电气股份有限公司 | The device and method of high-current low-voltage side twin voltage switching can be realized |
| CN207367763U (en) * | 2017-11-13 | 2018-05-15 | 天津天能变压器有限公司 | Ocean platform changes input Multiple coil dry-type transformer with 6-10kV twin voltages |
| CN208706422U (en) * | 2018-08-28 | 2019-04-05 | 特变电工沈阳变压器集团有限公司 | A kind of 500 kilovolts of single-phase autotransformer pin configurations |
| CN110379610A (en) * | 2019-08-19 | 2019-10-25 | 辽宁易发式电气设备有限公司 | Single-phase double-voltage self coupling phase shifting transformer |
| CN212434445U (en) * | 2020-06-19 | 2021-01-29 | 山东电力设备有限公司 | 220KV three-winding medium-voltage dual-voltage transformer lead structure |
-
2020
- 2020-06-19 CN CN202010570822.9A patent/CN111816428A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202134379U (en) * | 2011-07-11 | 2012-02-01 | 申达电气集团有限公司 | Double-voltage convertible transformer |
| CN202352498U (en) * | 2011-11-25 | 2012-07-25 | 保定天威集团有限公司 | Three-winding on-load voltage-regulating step-down transformer with taps at high, medium and low voltage |
| CN103606444A (en) * | 2013-11-28 | 2014-02-26 | 天津天能变压器有限公司 | Multi-winding phase-shifting split dry-type transformer for ship or ocean platform |
| CN106816294A (en) * | 2015-11-30 | 2017-06-09 | 特变电工沈阳变压器集团有限公司 | A kind of pair of high pressure shares a Multifunction transformer for voltage regulation coil |
| CN107134342A (en) * | 2017-05-09 | 2017-09-05 | 山东电力设备有限公司 | A kind of 110kV two-winding transformers pin configuration |
| CN107424806A (en) * | 2017-08-30 | 2017-12-01 | 正泰电气股份有限公司 | The device and method of high-current low-voltage side twin voltage switching can be realized |
| CN207367763U (en) * | 2017-11-13 | 2018-05-15 | 天津天能变压器有限公司 | Ocean platform changes input Multiple coil dry-type transformer with 6-10kV twin voltages |
| CN208706422U (en) * | 2018-08-28 | 2019-04-05 | 特变电工沈阳变压器集团有限公司 | A kind of 500 kilovolts of single-phase autotransformer pin configurations |
| CN110379610A (en) * | 2019-08-19 | 2019-10-25 | 辽宁易发式电气设备有限公司 | Single-phase double-voltage self coupling phase shifting transformer |
| CN212434445U (en) * | 2020-06-19 | 2021-01-29 | 山东电力设备有限公司 | 220KV three-winding medium-voltage dual-voltage transformer lead structure |
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Application publication date: 20201023 |