CN106409482B - A kind of auto-transformer and its experiment connection method - Google Patents
A kind of auto-transformer and its experiment connection method Download PDFInfo
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- CN106409482B CN106409482B CN201510468041.8A CN201510468041A CN106409482B CN 106409482 B CN106409482 B CN 106409482B CN 201510468041 A CN201510468041 A CN 201510468041A CN 106409482 B CN106409482 B CN 106409482B
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Abstract
The present invention relates to a kind of auto-transformer and its experiment connection method, there is three-phase five-limb core structure, only connect the auto-transformer of group with low-voltage coil YNa0 comprising high-tension coil, high pressure uses on-load voltage regulation mode, and coil arrangement is：Iron core common winding voltage regulation coil series coil.The inventive method comprises the following steps：The experiment intermediate transformer of a star-angle type connection group is set up, and requires that the rated voltage of the star coil of experiment intermediate transformer is greater than or equal to the rated voltage of auto-transformer low-voltage coil；The low-voltage coil of auto-transformer is connected with star-angle type experiment with the star-like coil of intermediate transformer.The present invention reduces the manufacturing cost of transformer and the operating cost of power network, reduces the installation space of transformer, reduce the operation troubles incidence of power network due to being not provided with corner connection coil.
Description
Technical field
The present invention relates to a kind of Transformer Manufacturing Technology, specifically a kind of auto-transformer and its test connection side
Method.
Background technology
3-phase autotransformer is to include three coils, as YNa0d1 in transformer's type product in power equipment at present
Or YNa0d11 structures.Wherein primary side and second siding ring are that transmission electric energy is used, and balance coil (corner connection coil) plays flat
Weigh the effects of zero sequence fluxes, avoid three times or its higher hamonic wave problem, particularly with the change of high-capacity three-phase pentastyle structure
Depressor, the problem of balance coil (corner connection coil) avoids three alternate Voltage unbalance and neutral point drifting.Therefore corner connection coil
Presence for 3-phase autotransformer act on it is huge.But if when the corner connection coil does not accept any load in power network,
The presence of corner connection coil is undoubtedly the increase in the manufacturing cost of transformer, also increases operation and the maintenance cost of grid equipment,
The fault rate of power network is also increased, also makes the design of transformer and power station, manufacture more complicated.
The content of the invention
For 3-phase autotransformer in the prior art balance coil increase transformer manufacturing and grid equipment operation,
Maintenance cost, the deficiencies of also increasing the fault rate and complexity of power network, the technical problem to be solved in the present invention is to provide one kind
Reduce maintenance, operating cost, the auto-transformer and its test connection method for reducing installation space.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of auto-transformer of the present invention, has three-phase five-limb core structure, only comprising high-tension coil and low-voltage coil
The auto-transformer of YNa0 connection groups, high pressure use on-load voltage regulation mode, and coil arrangement is：Iron core-common winding-tune
Line ball circle-series coil.
Series coil SER uses middle part outlet structure, and voltage regulation coil TAP demodulates to be positive, and common winding COM goes out for end
Line, it is connected at neutral point HOXO.
A kind of auto-transformer experiment connection method of the present invention comprises the following steps：
The experiment intermediate transformer of a star-angle type connection group is set up, and requires the star of experiment intermediate transformer
The rated voltage of coil is greater than or equal to the rated voltage of auto-transformer low-voltage coil；
The low-voltage coil of auto-transformer is connected with star-angle type experiment with the star-like coil of intermediate transformer.
The inventive method is further comprising the steps of：
Auto-transformer is required to be directly grounded with star-angle type experiment with the neutral point of the star coil of intermediate transformer.
The invention has the advantages that and advantage：
1. the present invention reduces the manufacturing cost of transformer and the operating cost of power network due to being not provided with corner connection coil,
Reduce the installation space of transformer.
2. the present invention avoids due to the failure of corner connection coil due to being not provided with corner connection coil and causes transformer and electricity
The phenomenon of network operation failure, therefore reduce the operation troubles incidence of power network.
3. the present invention will not change whole transformer because of the failure of corner connection coil, and then reduce transformer and power network
Maintenance cost.
Brief description of the drawings
Fig. 1 is auto-transformer vector connection group figure of the present invention；
Fig. 2 is autotransformer connection schematic diagram of the present invention；
Fig. 3 is that auto-transformer of the present invention tests connection diagram；
Wherein, SER is series coil, and TAP is voltage regulation coil, and COM is common winding.
Embodiment
With reference to Figure of description, the present invention is further elaborated.
Auto-transformer of the present invention, there is three-phase five-limb core structure, only comprising high-tension coil and low-voltage coil, connection
Group is YNa0, and high pressure uses on-load voltage regulation mode, and coil arrangement is：Iron core-common winding-voltage regulation coil-series line
Circle.
As shown in figure 1, the connection group of transformer of the present invention is only YNa0, as acerous wiring circle auto-transformer.
As shown in Fig. 2 auto-transformer of the present invention is high pressure on-load voltage regulation, the series coil SER of auto-transformer is used
Middle part outlet structure, voltage regulation coil TAP demodulate to be positive, and common winding COM is end outlet, the common winding COM ends of three-phase
It is connected at neutral point HOXO.Coil arrangement is：Iron core-common winding-voltage regulation coil-series coil.
Auto-transformer experiment connection method of the present invention comprises the following steps：
The experiment intermediate transformer of a star-angle type connection group is set up, and requires the star of experiment intermediate transformer
The rated voltage for the auto-transformer low-voltage coil that the rated voltage of coil is greater than or equal in this patent；
The low-voltage coil of auto-transformer is connected with star-angle type experiment with the star-like coil of intermediate transformer；
Auto-transformer is required to be directly grounded with star-angle type experiment with the neutral point of the star coil of intermediate transformer.
As shown in figure 3, auto-transformer of the present invention needs to set up an experiment intermediate transformer at the trial, and require
Experiment is star-angle type transformer with intermediate transformer, i.e., experiment intermediate transformer will have a corner connection coil and an astroid
Circle, and require that the low-voltage coil of three-phase and five-pole YNa0 acerous wiring circle auto-transformers during experiment will be with anaplasia in experiment use
The star-like coil of depressor is connected, and requires the neutral-point solid ground (i.e. dead ground connection) of auto-transformer, the centre of experiment
The neutral point of transformer will be also directly grounded.It so just can accurately test out the performance ginseng of the YNa0 connection auto-transformers
Number and performance level；When can so be fully solved the experiment of three-phase five-limb YNa0 acerous wiring circle auto-transformers three times or
Its higher hamonic wave problem, the problem of also can solve three alternate Voltage unbalance and neutral point drifting.
Auto-transformer of the present invention, due to there is no corner connection coil, therefore operationally, the transformer that is attached thereto in power network
It is required that to have corner connection coil, and the acerous wiring of YNa0 of the neutral point of the star coil for the transformer being attached thereto and the present invention
The neutral point of circle auto-transformer is required to be directly grounded (i.e. dead ground connection).
Claims (3)
1. a kind of auto-transformer, there is three-phase five-limb core structure, it is characterised in that：Only include high-tension coil and low-voltage line
The auto-transformer of YNa0 connection groups is enclosed, high pressure uses on-load voltage regulation mode, and coil arrangement is：Iron core-common winding-
Voltage regulation coil-series coil；
Series coil SER uses middle part outlet structure, and voltage regulation coil TAP demodulates to be positive, and common winding COM is end outlet, even
It is connected at neutral point HOXO.
2. the experiment connection method of a kind of auto-transformer for described in claim 1, it is characterised in that comprise the following steps：
The experiment intermediate transformer of a star-angle type connection group is set up, and requires the star coil of experiment intermediate transformer
Rated voltage be greater than or equal to auto-transformer low-voltage coil rated voltage；
The low-voltage coil of auto-transformer is connected with star-angle type experiment with the star-like coil of intermediate transformer.
3. characterized by further comprising following steps for the experiment connection method of the auto-transformer as described in claim 2：
Auto-transformer is required to be directly grounded with star-angle type experiment with the neutral point of the star coil of intermediate transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510468041.8A CN106409482B (en) | 2015-07-31 | 2015-07-31 | A kind of auto-transformer and its experiment connection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510468041.8A CN106409482B (en) | 2015-07-31 | 2015-07-31 | A kind of auto-transformer and its experiment connection method |
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| Publication Number | Publication Date |
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| CN106409482A CN106409482A (en) | 2017-02-15 |
| CN106409482B true CN106409482B (en) | 2018-01-16 |
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| CN106941259A (en) * | 2017-05-05 | 2017-07-11 | 秦伟喆 | A kind of line segment formula three-phase load unbalance adjustment and boosting loss-reducing and electricity-saving device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2932586Y (en) * | 2006-07-19 | 2007-08-08 | 特变电工沈阳变压器集团有限公司技术中心 | An excitation-free autotransformer tap switch |
| CN101256891A (en) * | 2007-12-28 | 2008-09-03 | 保定天威集团有限公司 | Extra-high voltage single-phase autotransformer |
| CN201117415Y (en) * | 2007-11-12 | 2008-09-17 | 郑龙 | Self-coupled regulating transformer winding construction |
| CN101651030A (en) * | 2009-08-07 | 2010-02-17 | 中国西电电气股份有限公司 | Autotransformer with low-voltage compensation |
| CN104752043A (en) * | 2015-04-03 | 2015-07-01 | 正泰电气股份有限公司 | Voltage regulating method for three-phase loaded voltage-regulating self-coupling transformer |
-
2015
- 2015-07-31 CN CN201510468041.8A patent/CN106409482B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2932586Y (en) * | 2006-07-19 | 2007-08-08 | 特变电工沈阳变压器集团有限公司技术中心 | An excitation-free autotransformer tap switch |
| CN201117415Y (en) * | 2007-11-12 | 2008-09-17 | 郑龙 | Self-coupled regulating transformer winding construction |
| CN101256891A (en) * | 2007-12-28 | 2008-09-03 | 保定天威集团有限公司 | Extra-high voltage single-phase autotransformer |
| CN101651030A (en) * | 2009-08-07 | 2010-02-17 | 中国西电电气股份有限公司 | Autotransformer with low-voltage compensation |
| CN104752043A (en) * | 2015-04-03 | 2015-07-01 | 正泰电气股份有限公司 | Voltage regulating method for three-phase loaded voltage-regulating self-coupling transformer |
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| CN106409482A (en) | 2017-02-15 |
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