CN203983813U - A kind of 35kV combined transformer for photovoltaic generation - Google Patents
A kind of 35kV combined transformer for photovoltaic generation Download PDFInfo
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- CN203983813U CN203983813U CN201420331549.4U CN201420331549U CN203983813U CN 203983813 U CN203983813 U CN 203983813U CN 201420331549 U CN201420331549 U CN 201420331549U CN 203983813 U CN203983813 U CN 203983813U
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Abstract
The utility model relates to a kind of 35kV combined transformer for photovoltaic generation.Comprise a transformer body, this transformer body below is respectively arranged with operation with high pressure chamber and for placing the low-pressure chamber of the first low-voltage cable and the second low-voltage cable, a side of transformer body is provided with the high-tension cable chamber of a placement high-tension cable; In transformer body, be provided with axial direction double bundle winding transformer, axial direction double bundle winding transformer comprises that two low pressure windings and are connected to the high pressure winding of fuse, and two low pressure windings are connected with one end of two circuit breakers respectively; The other end of two circuit breakers is connected with described the first low-voltage cable and the second low-voltage cable; The first low-voltage cable and the second low-voltage cable are also connected to each load through the first dry-type transformer and the second dry-type transformer respectively; Fuse is also connected to high-tension cable through an on-load switch.The utility model combined axis, to two splitted construction, has been saved the investment of the electric equipments such as transformer and civil engineering.
Description
Technical field
The utility model relates to a kind of 35kV combined transformer for photovoltaic generation.
Background technology
Conventional transformer structure adopts axial direction double bundle structure, or be combined transformer, in field of photovoltaic power generation, along with the development of grid-connected photovoltaic power generation technology, big-and-middle-sized ground photo-voltaic power generation station is conventionally taking 1M Wp as a power generating modules, and this module generally comprises two 500kW inverters and a 1100kVA transformer with split winding.If adopt merely doublewound combined transformer, must purchase two identical 550kVA double winding combined transformers and could meet the function of a transformer with split winding, increase the investment of electric equipment and civil engineering.If adopt merely the oil-filled transformer of a 1100kVA axial direction double bundle structure, must adopt the form of preassembled transformer station, transformer, high-low-voltage electrical equipment etc. could be combined well, and the floor space of preassembled transformer station is large, transport difficulty in place.Based on this, we provide a kind of axial direction double bundle structure that adopts is the 35kV combined transformer of transformer body.
Summary of the invention
It is a kind of simple in structure that the purpose of this utility model is to provide, and is easy to the 35kV combined transformer for photovoltaic generation of promoting.
For achieving the above object, the technical solution of the utility model is: a kind of 35kV combined transformer for photovoltaic generation, comprise a transformer body, described transformer body below is respectively arranged with operation with high pressure chamber and for placing the low-pressure chamber of the first low-voltage cable and the second low-voltage cable, a side of described transformer body is provided with the high-tension cable chamber of a placement high-tension cable; In described transformer body, be provided with axial direction double bundle winding transformer, described axial direction double bundle winding transformer comprises that two low pressure windings and are connected to the high pressure winding of fuse, and described two low pressure windings are connected with one end of two circuit breakers respectively; The other end of described two circuit breakers is connected with described the first low-voltage cable and the second low-voltage cable; Described the first low-voltage cable and the second low-voltage cable are also connected to each load through the first dry-type transformer and the second dry-type transformer respectively; Described fuse is also connected to high-tension cable through an on-load switch; In described transformer body, be also provided with some for gathering the transducer of transformer data.
In the utility model embodiment, the tie point of described two circuit breakers and two low pressure windings is all connected to GND through low voltage surge arrester.
In the utility model embodiment, described high-tension cable is also connected with one end of high-voltage arrester and electrification display respectively with the tie point of on-load switch, and the other end of described high-voltage arrester and electrification display is all connected to GND.
In the utility model embodiment, the input of described the first low-voltage cable and the second low-voltage cable is all connected to photovoltaic generation unit group; Described photovoltaic generation unit group comprises some photovoltaic generation units; Described photovoltaic generation unit comprises the some photovoltaic modulies, direct current conflux case, inverter and the step-up transformer that connect successively.
In the utility model embodiment, described transducer comprises the temperature sensor for detection of oil temperature signal.
In the utility model embodiment, it is indoor that described high-voltage arrester, electrification display are all arranged at described high-tension cable; It is indoor that on-load switch and fuse are all arranged at described operation with high pressure; Described low voltage surge arrester, circuit breaker are all arranged in low-pressure chamber.
Compared to prior art, the utlity model has following beneficial effect:
1, the utility model adopts axial direction double bundle structure, has two low pressure windings; Between low pressure winding, there is very large short-circuit impedance, and not only equal but also less to the impedance of high pressure winding respectively, the separate unit capacity of limiting short-circuit current and increase transformer effectively.In the time that two low pressure branch road capacity, connection set are identical with voltage, meet in theory completely equally to the short-circuit impedance of primary side, eliminate the circulation of low pressure outlet side;
2, the outdoor use of the utility model, protection level IP54, weatherability is strong;
3, the utility model combined axis, to two splitted construction, has been saved the investment of the electric equipments such as transformer and civil engineering;
4, the utility model is simple in structure, is easy to promote, and has vast economic outlook.
Brief description of the drawings
Fig. 1 is axial direction double bundle structure principle chart.
Fig. 2 is the utility model combined transformer layout.
Fig. 3 is the system diagram of the 35kV combined transformer of the utility model photovoltaic generation.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is specifically described.
As Figure 1-3, a kind of 35kV combined transformer for photovoltaic generation of the present utility model, comprise a transformer body, described transformer body below is respectively arranged with operation with high pressure chamber and for placing the low-pressure chamber of the first low-voltage cable and the second low-voltage cable, a side of described transformer body is provided with the high-tension cable chamber of a placement high-tension cable; In described transformer body, be provided with axial direction double bundle winding transformer, described axial direction double bundle winding transformer comprises that two low pressure windings and are connected to the high pressure winding of fuse, and described two low pressure windings are connected with one end of two circuit breakers respectively; The other end of described two circuit breakers is connected with described the first low-voltage cable and the second low-voltage cable; Described the first low-voltage cable and the second low-voltage cable are also connected to each load (this load comprises illumination, temperature controller, UPS uninterrupted power supply and stand-by power supply etc.) through the first dry-type transformer and the second dry-type transformer respectively; Described fuse is also connected to high-tension cable through an on-load switch; In described transformer body, be also provided with some for gathering the transducer of transformer data.
The tie point of described two circuit breakers and two low pressure windings is all connected to GND through low voltage surge arrester.
Described high-tension cable is also connected with one end of high-voltage arrester and electrification display respectively with the tie point of on-load switch, and the other end of described high-voltage arrester and electrification display is all connected to GND.
The input of described the first low-voltage cable and the second low-voltage cable is all connected to photovoltaic generation unit group; Described photovoltaic generation unit group comprises some photovoltaic generation units; Described photovoltaic generation unit comprises the some photovoltaic modulies, direct current conflux case, inverter and the step-up transformer that connect successively.
Described transducer comprises the temperature sensor for detection of oil temperature signal.
It is indoor that described high-voltage arrester, electrification display are all arranged at described high-tension cable, and it is indoor that on-load switch and fuse are all arranged at described operation with high pressure; Described low voltage surge arrester, circuit breaker are all arranged in low-pressure chamber.
Machine body structure of the present utility model adopts axial direction double bundle, has two-way low pressure and inputs a road High voltage output.The advantage of two Split winding transformers: there are two low pressure windings; Between low pressure winding, there is very large short-circuit impedance, and not only equal but also less to the impedance of high pressure winding respectively, the separate unit capacity of limiting short-circuit current and increase transformer effectively.In the time that two low pressure branch road capacity, connection set are identical with voltage, meet in theory completely equally to the short-circuit impedance of primary side, eliminate the circulation of low pressure outlet side.Axial direction double bundle structural principle is as Fig. 1, and its transformer layout is as Fig. 2, and system diagram (taking photovoltaic generation with 35kV combined transformer as example) is as Fig. 3.
This combined transformer can be used for the step-up transformer on the spot in photo-voltaic power generation station, meets the at present general inverter level of production, the circulation of restriction two inverter AC low-tension outlet sides in parallel.The use of a Split type combined transformer can be saved the electric equipments such as another two winding transformer and civil engineering investment.
Along with the new forms of energy continuous lifting of share and the development of the maturation of photovoltaic power generation grid-connecting technology in national economy, the combined transformer taking transformer with split winding as device body will bring significant economic benefit and social benefit.
Be more than preferred embodiment of the present utility model, all changes of doing according to technical solutions of the utility model, when the function producing does not exceed the scope of technical solutions of the utility model, all belong to protection range of the present utility model.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420331549.4U CN203983813U (en) | 2014-06-20 | 2014-06-20 | A kind of 35kV combined transformer for photovoltaic generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420331549.4U CN203983813U (en) | 2014-06-20 | 2014-06-20 | A kind of 35kV combined transformer for photovoltaic generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203983813U true CN203983813U (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420331549.4U Expired - Lifetime CN203983813U (en) | 2014-06-20 | 2014-06-20 | A kind of 35kV combined transformer for photovoltaic generation |
Country Status (1)
| Country | Link |
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| CN (1) | CN203983813U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051972A (en) * | 2014-06-20 | 2014-09-17 | 国家电网公司 | A 35kV combined transformer for photovoltaic power generation |
-
2014
- 2014-06-20 CN CN201420331549.4U patent/CN203983813U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051972A (en) * | 2014-06-20 | 2014-09-17 | 国家电网公司 | A 35kV combined transformer for photovoltaic power generation |
| CN104051972B (en) * | 2014-06-20 | 2016-05-11 | 国家电网公司 | A kind of 35kV combined transformer for photovoltaic generation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141203 Effective date of abandoning: 20160511 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |