CN2857175Y - Neutral auto-transformer having constant third side voltage - Google Patents
Neutral auto-transformer having constant third side voltage Download PDFInfo
- Publication number
- CN2857175Y CN2857175Y CN 200520092315 CN200520092315U CN2857175Y CN 2857175 Y CN2857175 Y CN 2857175Y CN 200520092315 CN200520092315 CN 200520092315 CN 200520092315 U CN200520092315 U CN 200520092315U CN 2857175 Y CN2857175 Y CN 2857175Y
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- voltage
- neutral
- voltage regulating
- transformer
- auto
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Abstract
The utility model provides a neutral auto-transformer having constant third side voltage, having the technical problem to solve is: the voltage regulation mode of the present auto-transformer chiefly has a line end voltage regulating and neutral voltage regulating. When adopting the line end voltage regulating for producing the ultra high voltage 1000 kv level auto-transformer, the manufacturing difficulty and the cost of the switch and the voltage regulating leads is more than ten times than that of the neutral voltage regulating and the insulation security is not easy to ensure. When adopting the neutral voltage regulating, the voltage of the third winding changes. The voltage fluctuation is not allowed. The main point of the utility model is: a compensation coil is in series on the third windings of the auto-transformer, and an excitation coil is induced by a voltage regulating switch to give the compensation coil excitation to make the compensation coil generate compensation voltage folded on the third winding voltage. Thereby, the third side output voltage keeps constant. The active effect of the utility model is: the neutral voltage regulating has smaller manufacturing difficulty and the cost than that of the line end voltage regulating to control the third side voltage fluctuation.
Description
Technical field
The utility model relates to a kind of neutral point regulating autotransformer of three side voltage constants.
Background technology
Home and abroad autotransformer voltage regulating mode mainly contains line end pressure regulation and neutral point pressure regulation at present.Relatively, the neutral point pressure regulation is because tap changer and winding insulation level require lowlyer, so manufacture difficulty and cost are relatively low.When adopting the neutral point pressure regulation, because the pressure regulation winding is the common winding of both sides voltage, one time the winding total number of turns changes at different tap positions simultaneously with the secondary winding total number of turns, and the general wherein side change in voltage that requires, it is constant that opposite side keeps, then the circle electromotive force of product can change along with the variation of tap position, both our variable flux voltage regulation of often saying.This will cause the voltage of the tertiary winding (being the balance winding) to change thereupon.Do not have external load or compensating action three sides, when three times the side scope range of the fluctuation of voltage did not exceed three side system protection levels, this variation can allow.When three sides need external loads, or external reactance is when carrying out line build-out, and this voltage fluctuation just can not allow.This also is the reason that present domestic most autotransformers all adopt the line end pressure regulation.For the ultra high voltage 1000kV level autotransformer that is about to produce, wherein piezoelectricity is pressed and is 500kV, if adopt the line end pressure regulation, then must adopt 500kV level switch, and voltage regulation coil and lead-in wire also will be the 500kV level.Then the manufacture difficulty of switch and pressure regulation lead-in wire and cost all will increase by tens times than the neutral point pressure regulation, and insulation safety also is difficult for guaranteeing.
Summary of the invention
The purpose of this utility model is to provide a kind of autotransformer of neutral point pressure regulation of the fluctuation that can control three side output voltages.
The purpose of this utility model is achieved in that to guaranteeing three side output voltages constant, must compensate and correct tertiary winding voltage.The scheme that present technique is taked is bucking coil of series connection on the autotransformer tertiary winding, draw a magnetizing coil by tap changer and give the bucking coil excitation, make bucking coil produce bucking voltage and be superimposed upon on the tertiary winding voltage, the different bucking voltages of tap position are also different.During specified tap, bucking voltage is zero; When tertiary winding voltage reduced, polarity identical, an amplitude and the identical voltage of reduction value superposeed; When voltage raises, the voltage that the polarity that superposes is opposite, amplitude is identical with lift-off value; Make three side output voltages keep constant like this.
The beneficial effects of the utility model are: the neutral point pressure regulation is low than line end pressure regulation voltage levvl, and manufacture difficulty and cost are little, but because the fluctuation of tertiary voltage has limited the application of this voltage regulating mode.After the employing present technique, can control three side voltage fluctuations when adopting the neutral point voltage regulating mode, production cost and the raising product reliability that reduces autotransformer (particularly superhigh pressure, big capacity autotransformer) had very big effect.With 1,000,000 volts of transformers is row: owing to can adopt the neutral point pressure regulation after this technology of employing, the pressure regulation insulation level has dropped to 110kV by 500kV, and only one every on switch gets final product reduction of expenditure more than 450,000 yuan, also can make product copper-steel material material cost reduce significantly; The more important thing is that make the insulating reliability of product increase substantially, this is vital to EHV transformer.
Description of drawings
Further specify the utility model below in conjunction with accompanying drawing.
Fig. 1 is three side voltage compensations of neutral point pressure regulation winding diagram (positive and negative accent).
Fig. 2 is three side voltage compensations of neutral point pressure regulation winding diagram (the linear accent).
Embodiment
As shown in Figure 1, 2, bucking coil adopts independent device body 2 promptly to adopt the magnetic loop unshakable in one's determination that separates with main body 1, its magnetizing coil 2.1 two-terminal link to each other with the positive and negative change over contact K of switch (or the middle contact of linear accent is referring to Fig. 2), switch movable contact respectively, and magnitude of voltage changes with tap position is different with polarity.And in bucking coil 2.2, inducing correspondent voltage, compensation makes three side output voltages keep constant on the tertiary winding.Through checking computations, after the employing present technique, three side voltage fluctuations can be controlled in 0.5%, satisfy the requirement of national standard and grid equipment operation.
Claims (2)
1, a kind of neutral point regulating autotransformer of three side voltage constants, it has autotransformer, it is characterized in that: bucking coil of series connection on the autotransformer tertiary winding, draw a magnetizing coil by tap changer and give the bucking coil excitation.
2, according to the neutral point regulating autotransformer of described three the side voltage constants of claim 1, it is characterized in that: bucking coil adopts independent device body promptly to adopt the magnetic loop unshakable in one's determination that separates with main body, and its magnetizing coil two-terminal links to each other with the positive and negative change over contact K of switch, switch movable contact respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520092315 CN2857175Y (en) | 2005-08-31 | 2005-08-31 | Neutral auto-transformer having constant third side voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520092315 CN2857175Y (en) | 2005-08-31 | 2005-08-31 | Neutral auto-transformer having constant third side voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2857175Y true CN2857175Y (en) | 2007-01-10 |
Family
ID=37600479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520092315 Expired - Lifetime CN2857175Y (en) | 2005-08-31 | 2005-08-31 | Neutral auto-transformer having constant third side voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2857175Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102945735A (en) * | 2012-11-06 | 2013-02-27 | 保定天威集团有限公司 | Pre-magnetizing transformer with voltage regulator and manufacture method thereof |
| CN104267773A (en) * | 2014-09-12 | 2015-01-07 | 江苏新特变科技股份有限公司 | Voltage regulation device |
-
2005
- 2005-08-31 CN CN 200520092315 patent/CN2857175Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102945735A (en) * | 2012-11-06 | 2013-02-27 | 保定天威集团有限公司 | Pre-magnetizing transformer with voltage regulator and manufacture method thereof |
| CN104267773A (en) * | 2014-09-12 | 2015-01-07 | 江苏新特变科技股份有限公司 | Voltage regulation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TBEA SHENYANG TRANSFORMER GROUP CO., LTD. Free format text: FORMER OWNER: TBEA SHENYANG TRANSFORMER GROUP CO., LTD. TECHNOLOGY CENTER Effective date: 20100406 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 110025 NO.18, NORTH 2ND RING MIDDLE ROAD, TIEXI DISTRICT, SHENYANG CITY, LIAONING PROVINCE TO: 110144 NO.32, KAIFA ROAD, ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE,SHENYANG CITY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100406 Address after: 110144 Shenyang economic and Technological Development Zone Development Road No. 32 Patentee after: TBEA Shenyang Transformer (Group) Co., Ltd. Address before: 110025 18, No. two middle North Road, Tiexi District, Liaoning, Shenyang Patentee before: Technology Centre, Shenyang Transformer Group Co., Ltd., Tebian Diangong |
|
| CX01 | Expiry of patent term |
Expiration termination date: 20150831 Granted publication date: 20070110 |
|
| EXPY | Termination of patent right or utility model |