CN101599346A - A kind of low-loss high-impedance electric power transformer - Google Patents
A kind of low-loss high-impedance electric power transformer Download PDFInfo
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- CN101599346A CN101599346A CNA2009100307517A CN200910030751A CN101599346A CN 101599346 A CN101599346 A CN 101599346A CN A2009100307517 A CNA2009100307517 A CN A2009100307517A CN 200910030751 A CN200910030751 A CN 200910030751A CN 101599346 A CN101599346 A CN 101599346A
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Abstract
A kind of low-loss high-impedance electric power transformer, by iron core (1), shield (2), high-tension coil (3), intermediate voltage winding (4), low-voltage coil (5), fuel tank (6) and annex and form, it is characterized in that it adopts iron core (1)-ground screen (2)-high-tension coil (3)-intermediate voltage winding (4)-low-voltage coil (5)-such coil arrangement mode of fuel tank (6) from iron core (1) to fuel tank (6), realizing the high impedance performance of three-winding transformer, advantages such as this transformer has that running wastage is low, material usage is few, simple in structure, low cost of manufacture.
Description
Technical field
The present invention relates to a kind of high-impedance electric power transformer, belong to the transformer technology field, that is to say to the power transmission and transformation field provides a kind of novel low-loss high-impedance electric power transformer.
Background technology
In electric power system, power transformer is as the capital equipment of electric energy transmitting, and its operational reliability must strict guarantee.Because the short trouble that is in operation is difficult to avoid, and the short circuit current that transformer will flow through during short circuit makes transformer suffer very big mechanical force, may produce damaging influence to transformer, thereby the harm electrical network moves normally.According to the transformer theory, square being inversely proportional to of this mechanical force and transformer short-circuit impedance is so high-impedance transformer is widely used as the method that improves the transformer operational reliability.Use at present the short-circuit impedances between three pairs of operations of more high-impedance transformer winding to be respectively on the electrical network: high impedance during high impedance during conventional impedance during high pressure-middle pressure operation, high pressure-low pressure operation, middle pressure-low pressure operation, and in-impedance during impedance ratio height during low operation-middle operation is big.
Traditional high-impedance transformer implementation method has at present: 1). and adopt the coil arrangement mode (promptly splitting the method for high-tension coil) of iron core-low-voltage coil-high-tension coil one-intermediate voltage winding-high-tension coil two-fuel tank to realize the high impedance performance, as shown in Figure 1, shortcoming such as big, manufacturing cost height of this method structure more complicated, transformer load loss; 2). adopt the method for low-pressure side string reactor to realize the high impedance performance, have too that the transformer size is bigger than normal, defectives such as complex structure and manufacturing cost height.This is because a large amount of three-winding transformers is the high and medium voltage full capacity on the present electrical network, low-voltage coil only is half capacity, therefore, the loss of transformer moves and examines with high pressure-middle pressure, and traditional transformer is because high and medium voltage comes the outside, and high-tension coil some in outermost, its diameter is bigger when realizing the high impedance parameter, thereby cause that the length under the identical number of turn increases the resistance increase, the also corresponding increase of its material usage and running wastage, in order to make running wastage can be reduced to the standard gauge definite value, usually the copper section of coil to be amplified to reduce copper cash resistance, so also increased the consumption of copper cash.
In sum, adopt conventional art to design the shortcomings such as method ubiquity complex structure, manufacturing cost height of such high impedance.
Summary of the invention
High-impedance transformer of the present invention can solve above-mentioned deficiency or shortcoming well.Technic relization scheme of the present invention is: adopt the built-in coil arrangement mode of high-tension coil, promptly coil manufactures and designs three winding high-impedance transformers by putting in order of iron core-ground screen-high-tension coil-intermediate voltage winding-low-voltage coil-fuel tank.Because coil quantity is identical with conventional transformer, and the high and medium voltage coil comes the inboard, so coil diameter is less relatively, and the length under the identical number of turn is also less, therefore, this transformer have that running wastage is low, material usage is few, advantage such as simple in structure and low cost of manufacture.When high-tension coil is placed near core side, need to shield, with the wedge angle on shielding iron core surface on surface unshakable in one's determination with being provided with; Carry out electric Field Calculation simultaneously, determine the distance between high pressure and iron core, to satisfy the requirement of transformer insulated intensity aspect.
The invention will be further described below in conjunction with drawings and Examples.
Description of drawings
Fig. 1. the coil arrangement mode schematic diagram of conventional high-impedance transformer (iron core-low-voltage coil-high-tension coil one-intermediate voltage winding-high-tension coil two-fuel tank);
Fig. 2. the coil arrangement mode schematic diagram (iron core-high-tension coil-intermediate voltage winding-low-voltage coil-fuel tank) of high-impedance transformer of the present invention;
Embodiment
As embodiment, high-impedance transformer of the present invention, its technic relization scheme is: adopt the built-in coil arrangement mode of high-tension coil, as shown in Figure 2, promptly coil manufactures and designs three winding high-impedance transformers by putting in order of iron core 1-ground screen 2-high-tension coil 3-intermediate voltage winding 4-low-voltage coil 5-fuel tank 6.Because coil quantity is identical with conventional transformer, and high-tension coil 3 and intermediate voltage winding 4 come the inboard, so coil diameter is less relatively, and the length under the identical number of turn is also less; When high-tension coil 3 is placed near iron core 1 one sides, need to shield 2, with the wedge angle on shielding iron core surface on 1 surface unshakable in one's determination with being provided with; Carry out electric Field Calculation simultaneously, determine the distance between high pressure and iron core, to satisfy the requirement of transformer insulated intensity aspect.Advantages such as this high-impedance transformer has that running wastage is low, material usage is few, simple in structure and low cost of manufacture.
Claims (1)
- A kind of low-loss high-impedance electric power transformer, by iron core (1), shield (2), high-tension coil (3), intermediate voltage winding (4), low-voltage coil (5), fuel tank (6) and annex and form, it is characterized in that it adopts iron core (1)-ground screen (2)-high-tension coil (3)-intermediate voltage winding (4)-low-voltage coil (5)-such coil arrangement mode of fuel tank (6) from iron core (1) to fuel tank (6), to realize the high impedance performance of three-winding transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100307517A CN101599346A (en) | 2009-04-15 | 2009-04-15 | A kind of low-loss high-impedance electric power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100307517A CN101599346A (en) | 2009-04-15 | 2009-04-15 | A kind of low-loss high-impedance electric power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101599346A true CN101599346A (en) | 2009-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100307517A Pending CN101599346A (en) | 2009-04-15 | 2009-04-15 | A kind of low-loss high-impedance electric power transformer |
Country Status (1)
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| CN (1) | CN101599346A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543406A (en) * | 2011-01-04 | 2012-07-04 | 特变电工衡阳变压器有限公司 | High-impedance combined-type transformer |
| CN102543398A (en) * | 2010-12-24 | 2012-07-04 | 特变电工沈阳变压器集团有限公司 | Transformer for realizing voltage change through changeover of leads |
| CN102751710A (en) * | 2012-07-30 | 2012-10-24 | 浙江大学 | Novel magnetic shielding air-core transformer coupling bridge type solid state fault current limiter |
| CN104104234A (en) * | 2013-04-07 | 2014-10-15 | 华云逸力(北京)光纤传感技术有限公司 | Secondary power supply technology under high-voltage environment based on electromagnetic theory |
| CN105405615A (en) * | 2015-12-02 | 2016-03-16 | 山东电力设备有限公司 | High-impedance transformer |
-
2009
- 2009-04-15 CN CNA2009100307517A patent/CN101599346A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543398A (en) * | 2010-12-24 | 2012-07-04 | 特变电工沈阳变压器集团有限公司 | Transformer for realizing voltage change through changeover of leads |
| CN102543398B (en) * | 2010-12-24 | 2014-03-12 | 特变电工沈阳变压器集团有限公司 | Transformer for realizing voltage change through changeover of leads |
| CN102543406A (en) * | 2011-01-04 | 2012-07-04 | 特变电工衡阳变压器有限公司 | High-impedance combined-type transformer |
| CN102543406B (en) * | 2011-01-04 | 2015-07-22 | 特变电工衡阳变压器有限公司 | High-impedance combined-type transformer |
| CN102751710A (en) * | 2012-07-30 | 2012-10-24 | 浙江大学 | Novel magnetic shielding air-core transformer coupling bridge type solid state fault current limiter |
| CN102751710B (en) * | 2012-07-30 | 2015-01-28 | 浙江大学 | Novel magnetic shielding air-core transformer coupling bridge type solid state fault current limiter |
| CN104104234A (en) * | 2013-04-07 | 2014-10-15 | 华云逸力(北京)光纤传感技术有限公司 | Secondary power supply technology under high-voltage environment based on electromagnetic theory |
| CN105405615A (en) * | 2015-12-02 | 2016-03-16 | 山东电力设备有限公司 | High-impedance transformer |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091209 |