CN2221821Y - Two-phase or single-phase load voltage-regulating three-phase transformer - Google Patents
Two-phase or single-phase load voltage-regulating three-phase transformer Download PDFInfo
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- CN2221821Y CN2221821Y CN 95202964 CN95202964U CN2221821Y CN 2221821 Y CN2221821 Y CN 2221821Y CN 95202964 CN95202964 CN 95202964 CN 95202964 U CN95202964 U CN 95202964U CN 2221821 Y CN2221821 Y CN 2221821Y
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- phase
- transformer
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Abstract
The utility model relates to a transformer. The existing three-phase simultaneous voltage-regulating transformer can not satisfy the requirement of operating condition of railway electrification tractive power supply system. The primary side of the transformer adopts star connection, while the secondary side adopts triangle connection. The a-phase and the c-phase main coils of the secondary side are respectively connected in series with a voltage-regulating coil with a tap, or both ends of the b-phase main coil of the secondary side are respectively connected in series with a voltage-regulating coil with a tap. Each voltage-regulating coil is connected with a single-phase load voltage-regulating tap switch. The public end of the a-phase and the c-phase main coils is used as one output end of the transformer, and the voltage-regulating arms of the load voltage-regulating tap switch are used as the other two output ends of the transformer. The product is especially suitable for railway electrification tractive power supply systems.
Description
The utility model belongs to design, the manufacturing technology field of three-phase transformer.
The structure of general three-phase on-load tap-changing transformer is to settle a three-phase on-load tap changer at its primary side with three pressure regulation windings, carries out three-phase voltage and transfers simultaneously or transfer down.Used on-load tap changer has been standardized product and series of products at present, can manual, electronic or automatic adjusting.The railway electrification tractive power supply system is supplied with a three-phase transformer by the three phase network power supply under normal conditions, and these transformer belt two phase loads are seen Fig. 1 then.Fig. 1 (A) is the first side winding wiring, (B) is the secondary side winding wiring.L1 is descending (or up) locomotive contact line among the figure, and L2 is up (or descending) locomotive contact line, and L is a rail.If low pressure outlet side a phase voltage causes pressure drop because of load increases (have this moment many locomotives by), and the b phase factor is zero load, voltage is higher.A wishes that mutually voltage heightens, and b does not wish to heighten or wish to turn down mutually.If can't satisfying, the transformer that adopts primary side band three-phase on-load tap changer to carry out three synchronised pressure regulation uses needs.
The purpose of this utility model provides a kind of three-phase transformer that is particularly suitable for railway electrification tractive power supply system working condition requirement.
Structure of the present utility model is as follows: the primary side of this three-phase transformer is a star connection, secondary side is a delta connection, the a of secondary side mutually and c respectively be in series with a voltage regulation coil of being with tap in the main coil two ends that respectively are in series with the b phase main coil of the voltage regulation coil of band tap or secondary side mutually, said each voltage regulation coil respectively is connected to a single-phase on-load tap changer, the tap of voltage regulation coil is connected to the fixed contact of voltage adjustment of on-load shunting switch, with a mutually and c mutually the common port of main coil be an output of this transformer, be other two outputs of this transformer with the pressure regulation arm of on-load tap changer.Preferably with a mutually and the common port of c phase main coil be the transformer output that is connected with rail, be the transformer output that is connected with the locomotive contact line with the pressure regulation arm of on-load tap changer.On-load tap changer in the utility model can adopt the standard type product, and the user reads voltage, current signal from transformer outlet side electrical network, adds time conditions, and the pressure regulation arm of on-load tap changer is carried out manual, electronic or automatic Regulation.
Good effect of the present utility model is the shortcoming that has overcome prior art, and a kind of three-phase transformer that is suitable for railway electrification tractive power supply system working condition requirement is provided.
Fig. 1 is the winding connection figure of existing railway electrification tractive power supply system three-phase transformer,
Wherein (A) is the first side winding wiring, (B) is the secondary side winding wiring.
Fig. 2 and 3 is respectively secondary side winding winding diagram and the transformer cross-sectional view of embodiment 1.
Figure 4 and 5 are respectively secondary side winding winding diagram and the transformer cross-sectional view of embodiment 2.
Embodiment 1: see Fig. 2 and 3.Same Fig. 1 of first side winding winding diagram (A).Fig. 2 and 3 is respectively secondary side winding winding diagram and transformer cross-sectional view.Wherein L1 is descending (or up) locomotive contact line, and L2 is up (or descending) locomotive contact line, and L is a rail.a
1---a
7, b
1---b
7Be respectively two groups of fixed contacts of two on-load tap changers.The a of secondary side mutually and c mutually main coil respectively be in series with a voltage regulation coil of being with tap.With a mutually and the common port of c phase main coil be the transformer output that is connected with rail, be the transformer output that is connected with the locomotive contact line with the pressure regulation arm of on-load tap changer.1 is iron core, and 2 is high pressure (primary side) winding, and 3 is low pressure (secondary side) winding, and 4 is voltage regulation coil.The single-phase on-load tap changer of CV1-700/6010 type that on-load tap changer adopts Huaming, Shanghai switchgear plant to produce.The design of Windings of this embodiment has adopted our factory ZL93219781.7 patented technology simultaneously.A, C are heavily loaded phase mutually, and B phase structure capacity is A, C phase 0.4 times.Transformer high-voltage side three-phase input capacity is 31500KVA, and low-pressure side two-phase output capacity is 29766KVA, and the capacity usage factor is 0.9449.High-pressure side A, C phase current are 206.67 peaces, and B is 82.67 peaces mutually.Low-pressure side a, c phase current are 477.27 peaces, and b is 190.91 peaces mutually.High pressure side line voltage is 110KV, and low pressure side line voltage is 27.5KV.High pressure winding A, B, C are 724 circles mutually.Low pressure winding a, b, c are 330 circles mutually.Pressure regulation winding (only a, c just have mutually) is 96 circles.
Embodiment 2: see Figure 4 and 5.Same Fig. 1 of first side winding winding diagram (A).Figure 4 and 5 are respectively secondary side winding winding diagram and transformer cross-sectional view.Wherein L1 is descending (or up) locomotive contact line, and L2 is up (or descending) locomotive contact line, and L is a rail.a
1---a
7, b
1---b
7Be respectively two groups of fixed contacts of two on-load tap changers.The two ends of the b phase main coil of secondary side respectively are in series with the voltage regulation coil of band tap, with a mutually and the common port of c phase main coil be the transformer output that is connected with rail, be the transformer output that is connected with the locomotive contact line with the pressure regulation arm of on-load tap changer.1 is iron core, and 2 is high pressure (primary side) winding, and 3 is low pressure (secondary side) winding, and 4 is voltage regulation coil.The single-phase on-load tap changer of CV1-700/6010 type that on-load tap changer adopts Huaming, Shanghai switchgear plant to produce.The design of Windings of this embodiment has still adopted our factory ZL93219781.7 patented technology simultaneously.A, C are heavily loaded phase mutually, and B phase structure capacity is A, C phase 0.4 times.Transformer high-voltage side three-phase input capacity is 12500KVA, and low-pressure side two-phase output capacity is 11811KVA, and the capacity usage factor is 0.9449.High-pressure side A, C phase current are 82.01 peaces, and B is 32.8 peaces mutually.Low-pressure side a, c phase current are 189.39 peaces, and b is 75.76 peaces mutually.High pressure side line voltage is 110KV, and low pressure side line voltage is 27.5KV.High pressure winding A, B, C are 1159 circles mutually.Low pressure winding a, b, c are 550 circles mutually.Pressure regulation winding (only b just has mutually) is 232 circles.
Claims (2)
1, a kind of two-phase or single-phase load tapchanging three-phase transformer, it is characterized in that: primary side is the shape connection, secondary side is a delta connection, the a of secondary side mutually and c respectively be in series with a line ball circle of being with tap in the main coil two ends that respectively are in series with the b phase main coil of the voltage regulation coil of a band tap or secondary side mutually, said each voltage regulation coil respectively is connected to a single-phase on-load tap changer, the tap of pressure regulation circle is connected to the fixed contact of voltage adjustment of on-load shunting switch, with a mutually and a c output of this transformer of common port of main coil mutually, with the pressure regulation arm of on-load tap changer be other two outputs of this transformer.
2, as the said three-phase transformer of claim 1, it is characterized in that: with a mutually and the common port of c phase main coil be the transformer output that is connected with rail, be the transformer output that is connected with the locomotive contact line with the pressure regulation arm of on-load tap changer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95202964 CN2221821Y (en) | 1995-02-20 | 1995-02-20 | Two-phase or single-phase load voltage-regulating three-phase transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95202964 CN2221821Y (en) | 1995-02-20 | 1995-02-20 | Two-phase or single-phase load voltage-regulating three-phase transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2221821Y true CN2221821Y (en) | 1996-03-06 |
Family
ID=33855970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95202964 Expired - Fee Related CN2221821Y (en) | 1995-02-20 | 1995-02-20 | Two-phase or single-phase load voltage-regulating three-phase transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2221821Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383221B (en) * | 2008-02-26 | 2011-04-20 | 上海华明电力设备制造有限公司 | Three phase reactor on-load tap-changer |
| CN106653316A (en) * | 2017-01-18 | 2017-05-10 | 广西柳州特种变压器有限责任公司 | Single-phase power supply system of three-phase transformer |
-
1995
- 1995-02-20 CN CN 95202964 patent/CN2221821Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383221B (en) * | 2008-02-26 | 2011-04-20 | 上海华明电力设备制造有限公司 | Three phase reactor on-load tap-changer |
| CN106653316A (en) * | 2017-01-18 | 2017-05-10 | 广西柳州特种变压器有限责任公司 | Single-phase power supply system of three-phase transformer |
| CN106653316B (en) * | 2017-01-18 | 2018-07-27 | 北海银河生物产业投资股份有限公司 | A kind of three-phase transformer single phase power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: YUNNAN TRANSFORMER FACTORY TO: YUNNAN TRANSFORMER ELECTRIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Yunnan Transformer Electric Co., Ltd. Patentee before: Yunnan Transformer Factory |
|
| 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 |