CN2133910Y - Distributing transformer with three windings - Google Patents
Distributing transformer with three windings Download PDFInfo
- Publication number
- CN2133910Y CN2133910Y CN 92225155 CN92225155U CN2133910Y CN 2133910 Y CN2133910 Y CN 2133910Y CN 92225155 CN92225155 CN 92225155 CN 92225155 U CN92225155 U CN 92225155U CN 2133910 Y CN2133910 Y CN 2133910Y
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- winding
- windings
- voltage
- reduced
- low pressure
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- Expired - Fee Related
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Abstract
The utility model relates to a distributing transformer with three windings, which is used for replacing two transformers with two windings to supply power to underground and earth surface simultaneously for a small-sized mine. The 690V low-voltage winding is delta-shaped konode, and the 400V low-voltage winding is Y-shaped konode. A 10 (6) KV high-voltage winding BH is divided into two parallel windings BH 1, BH 2, and the arrangement of the windings is shown in the figure. The delta-shaped winding can eliminate the influence of the third harmonic voltage to stabilize the output voltage. The capacitances of the two low-voltage windings can compensate each other. The active loss is reduced by 26.4 %; the copper material is reduced by 28.2 %; the silicon sheet is reduced by 20 %; the electric insulation oil is reduced by 27.5 %; the total weight is reduced by 23.6 %.
Description
The utility model is a kind of three winding distribution transformers, is specially adapted to do the down-hole and ground powers simultaneously to small mine, belongs to transformer ' s type.
In general small mine, shorter because of tunnel, down-hole length, often do not adopt mining transformer or explosion-proof transformer go into the well power supply (because of these dedicated transformer prices more expensive), only at the general double winding distribution transformer of wellhead assembly outgoing cable to underground power supply used.Because down-hole distribution voltage U2(690V) with ground distribution voltage U1(400V) different, adopt Fig. 1 distribution system device two station power distribution transformers just can meet the demands.Wherein 400V ground is the Y/Y tie lines with distribution transformer, has third harmonic voltage in the transformer core of this junction style, and when three-phase load was uneven, the neutral point potential drifting made three-phase voltage asymmetric.Two transformer electric energy losses, copper material, iron material consumption, transformer oil consumption, floor spaces etc. are all bigger, and operation maintenance is also inconvenient.Still not having 10(6 at present) kv/0.69kv/0.4kv three winding distribution transformers are available.
The purpose of this utility model is to overcome the shortcoming with two transformers, only provides two kinds of distribution voltages with one three winding distribution transformer, sees Fig. 2, simultaneously to down-hole and surface power supply.
Three winding distribution transformers provided by the utility model, the high pressure winding voltage is 10kV or 6kV, 690V low pressure winding is a △ shape tie lines, in order to satisfy the requirement of down-hole or ground isolated neutral system power supply, 400V low pressure winding is a Y shape tie lines, in order to satisfy the requirement of ground earth neutral system three-phase four-wire power supply.Can disappear the influence of third harmonic voltage in the iron core of △ shape tie lines keeps the balance of three-phase voltage.
At present only in the power transformer of big-and-middle capacity or special transformer, adopt Fig. 3 and Fig. 4 mode coiling three-winding transformer, BH(high pressure among the figure), press among the CH(), HH(low pressure) winding is axially-aligned.Because three winding footpath returns are put difference, the impedance of each winding is also different, can not satisfy the requirement that each low voltage voltage equates the high tension voltage impedance in the distribution system by Fig. 3 mode.Rationally adjust BH winding and HH, CH winding space by Fig. 4 winding arrangement mode, can make each low pressure winding, but, be difficult to draw the lead-out wire of regulation voltage from BH winding surface along with the increase of distribution transformer capacity to high pressure winding impedance approximately equal.
Three winding distribution transformers provided by the utility model adopt coil arrangement mode shown in Figure 5.Two low pressure winding HH1 and HH2 are near iron core, and wherein 690V low pressure winding is a △ shape tie lines, and 400V low pressure winding is a Y shape tie lines.10(6) kV high pressure winding BH is coil BH1, the BH2 that is divided into two connect in parallel, is enclosed within respectively on the low pressure winding.Adopt the electric junction style of Fig. 6.The coil volume of HH1, HH2, BH1, BH2 respectively equals 1/2nd of transformer rated capacity.
According to the ampere-turn equilibrium principle, power simultaneously and power supply capacity when equaling rated capacity when two kinds of distribution voltages of low-pressure side, high-pressure side BH1 and BH2 are by corresponding electric current, and total capacity approximates rated capacity.When low-pressure side had only a kind of power voltage supply (or another kind of voltage load is lighter), because total load reduces, the insulating oil temperature rise also decreased, and presses the constant condition of winding temperature rise, is in low pressure winding HH1 or suitably overload of HH2 under the load condition.Promptly the load of two low pressure winding HH1, HH2 can compensate mutually.When floor loading is light, but the bigger motor of down-hole across-the-line starting capacity, load when light in the down-hole, and ground can increase power consumption.And adopting the mode of two transformer-supplied at present, the load under the surface well can not compensate mutually.
Now compare with the two winding transformer of two 160kVA with the KVSS7-1 type three winding distribution transformers of 315kVA, active loss reduces by 26.4%, copper material consumption reduces by 28.2%, silicon steel sheet consumption reduces by 20%, transformer oil consumption reduces by 27.5%, total weight reduces by 23.6%, and floor space reduces, and operation maintenance is convenient.
Claims (3)
1, three winding distribution transformers is characterized in that 10 (6) kV high pressure windings are the coils that are divided into two connect in parallel, and 690V low pressure winding is a △ shape tie lines, and 400V low pressure winding is a Y shape tie lines.
2, three winding distribution transformers, the coil arrangement mode that it is characterized in that it are the close iron cores of 690V low pressure winding and 400V low pressure winding, and 10(6) kV high pressure winding is that the coil that is divided into two connect in parallel is enclosed within respectively on the low pressure winding.
3,, it is characterized in that the capacity of 690V low pressure winding, 400V low pressure winding and two high pressure windings that link in parallel respectively equals 1/2nd of total capacity as claim 1,2 described three winding distribution transformers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92225155 CN2133910Y (en) | 1992-06-15 | 1992-06-15 | Distributing transformer with three windings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92225155 CN2133910Y (en) | 1992-06-15 | 1992-06-15 | Distributing transformer with three windings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2133910Y true CN2133910Y (en) | 1993-05-19 |
Family
ID=33770013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92225155 Expired - Fee Related CN2133910Y (en) | 1992-06-15 | 1992-06-15 | Distributing transformer with three windings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2133910Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065776A (en) * | 2012-12-27 | 2013-04-24 | 吴江市变压器厂有限公司 | Winding structure of transformer |
| CN103310958A (en) * | 2013-06-29 | 2013-09-18 | 广东海鸿变压器有限公司 | Stereoscopic rolled iron core type photovoltaic transformer with stabilizing windings |
-
1992
- 1992-06-15 CN CN 92225155 patent/CN2133910Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065776A (en) * | 2012-12-27 | 2013-04-24 | 吴江市变压器厂有限公司 | Winding structure of transformer |
| CN103310958A (en) * | 2013-06-29 | 2013-09-18 | 广东海鸿变压器有限公司 | Stereoscopic rolled iron core type photovoltaic transformer with stabilizing windings |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |