CN204289045U - A kind of multi-functional winding construction for transformer - Google Patents
A kind of multi-functional winding construction for transformer Download PDFInfo
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- CN204289045U CN204289045U CN201420754178.0U CN201420754178U CN204289045U CN 204289045 U CN204289045 U CN 204289045U CN 201420754178 U CN201420754178 U CN 201420754178U CN 204289045 U CN204289045 U CN 204289045U
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Abstract
A kind of multi-functional winding construction for transformer of the utility model, comprises the main transformer pressure winding be wound in power transformer core and the string transformation winding be wound on series transformer iron core; Main transformer pressure winding comprises main transformer series connection winding, main transformer common winding and main transformer pressure regulation corner connection winding; Described string transformation winding comprises string and becomes excitation winding and string variable series tap-changing windings; Connect with main transformer respectively winding ends and string variable series tap-changing windings end of main transformer common winding head end is connected, and main transformer series connection winding head end is as high-voltage output end, and string variable series tap-changing windings head end is as low-voltage output, and main transformer common winding end is as earth terminal; Each tapping point of main transformer pressure regulation corner connection winding is connected respectively on the binding post of tap changer, and string becomes excitation winding head end and end respectively with the fixed contact of tap changer with regulate contact to be connected.Both decrease the quantity of winding, simplified the structure of transformer, again saved transformer cost, bring considerable economic benefit.
Description
Technical field
The utility model relates to power transformer manufacturing technology field, is specially a kind of multi-functional winding construction for transformer.
Background technology
In prior art, the function of each winding of transformer is all single, such as high-low pressure winding is used for inputing or outputing voltage, and tap-changing windings is used for regulation output voltage.Secondly, be all in the transformer that connects of star at winding, in order to ensure that induced potential is sinusoidal wave, need to arrange separately a corner connection winding, providing path to odd harmonic electric current, avoid voltage distortion.In addition, in the transformer that the electric pressure of some special high and low pressure sides is all very high, conveniently carry out Insulation Tests such as responding to, office puts, the input of a supply voltage must be provided.Under normal circumstances, above-mentioned functions be realized, all must be corresponding a winding is set, which adds the number of windings of transformer, make the complex structure of transformer, not only add cost, and the potential safety hazard of transformer can be increased.
Utility model content
For problems of the prior art, the utility model provides a kind of structure simple, with low cost, the safe and reliable multi-functional winding construction for transformer.
The utility model is achieved through the following technical solutions:
A kind of multi-functional winding construction for transformer of the utility model, comprises the main transformer pressure winding be wound in power transformer core and the string transformation winding be wound on series transformer iron core; Main transformer pressure winding comprises main transformer series connection winding, main transformer common winding and main transformer pressure regulation corner connection winding; Described string transformation winding comprises string and becomes excitation winding and string variable series tap-changing windings; Connect with main transformer respectively winding ends and string variable series tap-changing windings end of main transformer common winding head end is connected, and main transformer series connection winding head end is as high-voltage output end, and string variable series tap-changing windings head end is as low-voltage output, and main transformer common winding end is as earth terminal; Each tapping point of main transformer pressure regulation corner connection winding is connected respectively on the binding post of tap changer, and string becomes excitation winding head end and end respectively with the fixed contact of tap changer with regulate contact to be connected.
Preferably, the head and the tail series connection of each tapping point of main transformer pressure regulation corner connection winding, head end and the end of main transformer pressure regulation corner connection winding are drawn respectively and are connected corresponding bushing shell for transformer, and entirety connects power supply as the tertiary winding when transformer carries out Insulation Test.
Further, the first and last end composition delta connection of the three-phase windings of the tertiary winding, as corner connection winding for providing the path of odd harmonic electric current.
Preferably, main transformer pressure regulation corner connection winding, main transformer common winding and main transformer series connection winding outwards arranges coiling successively along the radial direction of power transformer core.
Preferably, string change excitation winding and string variable series tap-changing windings outwards arrange coiling successively along series transformer radial direction unshakable in one's determination.
Preferably, the fixed contact of tap changer arranges polarity reversing switch; String becomes excitation winding head end and is connected with the fixed contact of polarity reversing switch.
Compared with prior art, the utility model has following useful technique effect:
Main transformer pressure regulation corner connection winding is become excitation winding by switch and string and is connected in parallel by the utility model, the number of turn of the tap-changing windings in parallel with magnet exciting coil is regulated by tap changer, change the voltage of the excitation winding that string becomes, thus change the circle voltage of string change, during circle change in voltage, the voltage of the series voltage-regulating winding that string becomes changes thereupon, thus finally realizes the voltage-regulation of low-voltage output; Both decrease the quantity of winding, simplified the structure of transformer, again saved transformer cost, bring considerable economic benefit.
Further, after each tap series connection of main transformer pressure regulation corner connection winding, first and last end draws the sleeve pipe being connected to transformer, now tap-changing windings on the whole just can as the tertiary winding, when transformer carries out the Insulation Test such as induced test, local discharge test, this tertiary winding can as the input of experiment power supply voltage.
Further, the main transformer pressure regulation corner connection winding of corner connection, as the tertiary winding, in inside or can form delta connection in outside by sleeve pipe, for odd harmonic electric current provides path.Both serve the effect of regulation voltage, and as power input during test, as corner connection winding, can also provide path to harmonic current again simultaneously.
Further, by not only reducing the volume of transformer to the restriction of arrangement mode, and the manufacture be conducive to coil windings and maintenance; The scope of regulation and control is expanded by the setting of polarity reversing switch.
Accompanying drawing explanation
Fig. 1 is each coils arrangement in the utility model embodiment and connection diagram.
The three-phase corner connection schematic diagram that Fig. 2 is the tertiary winding described in the utility model embodiment.
In figure: 1 is main transformer series connection winding, and 2 is main transformer common winding, and 3 is main transformer pressure regulation corner connection winding, 4 is string change excitation winding, 5 is string variable series tap-changing windings, and A is main transformer series connection winding head end, and X1 is main transformer series connection winding ends, Am ' is main transformer common winding head end, N is main transformer common winding end, and a, x are main transformer pressure regulation corner connection winding first and last end, and a ', x ' are string change excitation winding first and last end, Am is string variable series tap-changing windings head end, and X2 is string variable series tap-changing windings end.A1, x1, a2, x2, a3, x3 are respectively the first and last end of tertiary winding three-phase.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail, described in be to explanation of the present utility model instead of restriction.
A kind of multi-functional winding construction for transformer of the utility model, as shown in Figure 1, it comprises the main transformer pressure winding be wound in power transformer core and the string transformation winding be wound on series transformer iron core; Main transformer pressure winding comprises main transformer series connection winding 1, main transformer common winding 2 and main transformer pressure regulation corner connection winding 3; String transformation winding comprises string and becomes excitation winding 4 and string variable series tap-changing windings 5; Main transformer common winding head end Am ' the winding ends X1 and string variable series tap-changing windings end X2 that connects with main transformer is respectively connected, main transformer series connection winding head end A is as high-voltage output end, string variable series tap-changing windings head end Am is as low-voltage output, and main transformer common winding end N is as earth terminal; Each tapping point of main transformer pressure regulation corner connection winding 3 is connected respectively on the binding post of tap changer, string become excitation winding head end a ' and end x ' respectively with the fixed contact k of tap changer with regulate contact o to be connected.
Wherein, the head and the tail series connection of each tapping point of main transformer pressure regulation corner connection winding 3, head end a and the end x of main transformer pressure regulation corner connection winding draw respectively and are connected corresponding bushing shell for transformer, and entirety connects power supply as the tertiary winding when transformer carries out Insulation Test.The first and last end composition delta connection of the three-phase windings of the tertiary winding, as corner connection winding for providing the path of odd harmonic electric current.
Concrete, as shown in Figure 1, main transformer pressure regulation corner connection winding 3, main transformer common winding 2 and main transformer series connection winding 1 outwards arranges coiling successively along the radial direction of power transformer core.String becomes excitation winding 4 and string variable series tap-changing windings 5 outwards arranges coiling successively along series transformer radial direction unshakable in one's determination.The fixed contact k of tap changer arranges polarity reversing switch; String becomes excitation winding head end a ' and is connected with the fixed contact of polarity reversing switch.
Realize the purpose of this utility model, need transformer to adopt the structure of indirect pressure regulation, namely regulated the output voltage of main transformer by the mode of series transformer pressure regulation.It comprises and to be arranged in power transformer core and along the main transformer pressure regulation corner connection winding 3 of radial outwards arrangement successively unshakable in one's determination, main transformer common winding 2 and main transformer series connection winding 1.The string be arranged on series transformer iron core becomes excitation winding 4 and string variable series tap-changing windings 5 outwards arranges successively along radial direction unshakable in one's determination.Main transformer pressure regulation corner connection winding 3 becomes excitation winding 4 by tap changer with string and is connected in parallel, and becomes excitation winding 4 to string power by main transformer pressure regulation corner connection winding 3.Main transformer common winding 2 and main transformer winding 1 of connecting is connected, by main transformer connect winding 1 one end as high-voltage output end; String variable series tap-changing windings 5 one end is connected with main transformer common winding head end Am ', by string variable series tap-changing windings 5 other end as low-voltage output.
String is regulated to become the number of turn of the main transformer pressure regulation corner connection winding 3 of excitation winding 4 parallel connection by tap changer, the voltage that string becomes excitation winding can be changed, the circle voltage that string becomes changes accordingly, thus changes the voltage of string variable series tap-changing windings 5, reaches the effect regulating low pressure output voltage.After each tap series connection of main transformer pressure regulation corner connection winding, first and last end is drawn and is connected to sleeve pipe, overall as the tertiary winding.When transformer carry out responding to, the Insulation Test such as office puts time, this tertiary winding can as power input.After each tap series connection of main transformer pressure regulation corner connection winding 3, first and last end is drawn as the tertiary winding, and the tertiary winding three phase composition delta connection, for odd harmonic electric current provides path.
During use, first, the function of the regulation voltage of main transformer pressure regulation corner connection winding 3 is realized by winding switching.Each tap 1,2 of main transformer pressure regulation corner connection winding 3 ... n is connected respectively on the pile crown that Switch Controller answers, the head end a ', the end x ' that the fixed contact k of tap changer, adjustment contact o and string are become excitation winding 4 are connected respectively, the connect end X1 of winding 1 of head end Am ' and the main transformer of main transformer common winding 2 is connected, connect the head end A of winding 1 as high-voltage output end by main transformer, the end X2 of string variable series tap-changing windings 5 is connected with the head end Am ' of main transformer common winding 2, and the head end Am of string variable series tap-changing windings 5 is as low-voltage output.
When tap changer switches, change and go here and there the number of turn becoming excitation winding 4 main transformer pressure regulation corner connection winding 3 in parallel, thus change the voltage that string becomes excitation winding 4, the number of turn becoming excitation winding 4 due to string is certain, therefore the circle voltage become of going here and there changes thereupon, and the voltage of string variable series tap-changing windings 5 also just changes, naturally, the low voltage voltage that string variable series tap-changing windings head end Am exports changes thereupon, so just reaches the effect regulating string variable series tap-changing windings head end Am output voltage.
The second, realize the input of main transformer pressure regulation corner connection winding 3 as experiment power supply by winding switching of the present utility model.After the series connection of main transformer pressure regulation corner connection winding 3 each tapping point head and the tail, on the whole can as a conventional winding, its first and last end a, x are drawn out to sleeve pipe, respectively as the tertiary winding.When transformer carries out the Insulation Test such as induced test, local discharge test, if high-low pressure electric pressure is all very high, be described, when there is no direct experiment power supply for high pressure 500kV and low pressure 400kV in this preferred embodiment, power supply can be connected to by this tertiary winding, complete test.
3rd, realize the function of main transformer pressure regulation corner connection winding 3 as corner connection winding by winding switching of the present utility model.In this example, because high-low pressure is that self coupling connects, be Yna0 connection, transformer does not have independent corner connection winding.Using pressure regulation corner connection winding 3 entirety of main transformer as a winding, can three phase composition delta connections, as shown in Figure 2, for odd harmonic electric current provides path.
By this structural design, one can be given for main transformer pressure regulation corner connection winding three kinds of functions, eliminate and independent test is set powers winding and corner connection winding, both the quantity of winding had been decreased, simplify the structure of transformer, again save transformer cost, bring considerable economic benefit.
Claims (6)
1. for a multi-functional winding construction for transformer, it is characterized in that, comprise the main transformer pressure winding be wound in power transformer core and the string transformation winding be wound on series transformer iron core; Described main transformer pressure winding comprises main transformer series connection winding (1), main transformer common winding (2) and main transformer pressure regulation corner connection winding (3); Described string transformation winding comprises string and becomes excitation winding (4) and string variable series tap-changing windings (5);
Connect with main transformer respectively winding ends (X1) and string variable series tap-changing windings end (X2) of main transformer common winding head end (Am ') is connected, main transformer series connection winding head end (A) is as high-voltage output end, string variable series tap-changing windings head end (Am) is as low-voltage output, and main transformer common winding end (N) is as earth terminal;
Each tapping point of main transformer pressure regulation corner connection winding (3) is connected respectively on the binding post of tap changer, string become excitation winding head end (a ') and end (x ') respectively with the fixed contact (k) of tap changer with regulate contact (o) to be connected.
2. a kind of multi-functional winding construction for transformer according to claim 1, it is characterized in that, the head and the tail series connection of main transformer pressure regulation corner connection winding (3) each tapping point, head end (a) and the end (x) of main transformer pressure regulation corner connection winding are drawn respectively and are connected corresponding bushing shell for transformer, and entirety connects power supply as the tertiary winding when transformer carries out Insulation Test.
3. a kind of multi-functional winding construction for transformer according to claim 2, is characterized in that, the first and last end composition delta connection of the three-phase windings of the tertiary winding, as corner connection winding for providing the path of odd harmonic electric current.
4. a kind of multi-functional winding construction for transformer according to claim 1, it is characterized in that, main transformer pressure regulation corner connection winding (3), main transformer common winding (2) and main transformer series connection winding (1) outwards arrange coiling successively along the radial direction of power transformer core.
5. a kind of multi-functional winding construction for transformer according to claim 1, is characterized in that, string becomes excitation winding (4) and string variable series tap-changing windings (5) outwards arranges coiling successively along series transformer radial direction unshakable in one's determination.
6. a kind of multi-functional winding construction for transformer according to claim 1, it is characterized in that, the fixed contact (k) of tap changer arranges polarity reversing switch; String change excitation winding head end (a ') be connected with the fixed contact of polarity reversing switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420754178.0U CN204289045U (en) | 2014-12-03 | 2014-12-03 | A kind of multi-functional winding construction for transformer |
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| CN201420754178.0U CN204289045U (en) | 2014-12-03 | 2014-12-03 | A kind of multi-functional winding construction for transformer |
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| CN204289045U true CN204289045U (en) | 2015-04-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158308A (en) * | 2016-08-30 | 2016-11-23 | 山东电力设备有限公司 | A kind of self coupling power transformer on-load voltage regulation structure cancelling the tertiary winding |
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2014
- 2014-12-03 CN CN201420754178.0U patent/CN204289045U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158308A (en) * | 2016-08-30 | 2016-11-23 | 山东电力设备有限公司 | A kind of self coupling power transformer on-load voltage regulation structure cancelling the tertiary winding |
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Effective date of registration: 20160722 Address after: 710075 Shaanxi city of Xi'an Province Tang Hing Road No. 7 Patentee after: China XD Electronic Corporation Patentee after: Changzhou XD Transformer Co., Ltd. Address before: 710075 Shaanxi city of Xi'an Province Tang Hing Road No. 7 Patentee before: China XD Electronic Corporation |