CN216719680U - High-voltage dual-voltage photovoltaic transformer - Google Patents
High-voltage dual-voltage photovoltaic transformer Download PDFInfo
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- CN216719680U CN216719680U CN202122980219.0U CN202122980219U CN216719680U CN 216719680 U CN216719680 U CN 216719680U CN 202122980219 U CN202122980219 U CN 202122980219U CN 216719680 U CN216719680 U CN 216719680U
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Abstract
The utility model discloses a high-voltage dual-voltage photovoltaic transformer which comprises a transformer oil tank, wherein a high-voltage sleeve is arranged on one side outside the oil tank, a low-voltage sleeve is arranged on the front side of the oil tank, a finned radiator is arranged on the rear side of the oil tank, an oil-immersed transformer body is arranged in the oil tank, a series-parallel connection type no-load tap-changer is fixedly arranged outside an oil tank shell and is connected with a high-voltage winding of the oil-immersed transformer body, the high-voltage winding is a segmented layer type winding and comprises an upper-section winding and a lower-section winding, and the upper-section winding and the lower-section winding are connected in series or in parallel through the series-parallel connection no-load tap-changer. The utility model is mainly suitable for the photovoltaic transformer, has the characteristics of compact structure, lower cost and complete protection device, can realize high-voltage double-voltage conversion, and is safe and reliable.
Description
Technical Field
The utility model relates to transformer equipment, in particular to a high-voltage dual-voltage photovoltaic transformer.
Background
At present, the transformer used by a transformer manufacturer mainly has the following problems:
domestic transformers for photovoltaic are generally step-up transformers, and electricity generated by a photovoltaic system cannot be directly applied to users for use, so that the electricity of the photovoltaic system is boosted by the transformers and then is merged into a power grid, the users need to reduce the voltage of electric energy through a distribution transformer from the power grid for use, and therefore if the electricity generated by the photovoltaic system can be directly butted with users, the electricity utilization cost can be reduced.
Disclosure of Invention
In order to solve the problems of the existing transformer, the utility model provides a high-voltage dual-voltage photovoltaic transformer, which reduces the power consumption cost.
In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows:
the utility model provides a transformer for high-pressure dual-voltage photovoltaic, it includes the transformer oil tank, and one side is provided with high-voltage bushing outside the oil tank, and the front side of oil tank sets up low-voltage bushing, and the rear side is provided with the gilled radiator, the oil tank in be provided with oil-immersed transformer ware body, oil tank casing external fixation be provided with the unloaded tapping switch of series-parallel connection type, it is connected with oil-immersed transformer ware body high-voltage winding, high-voltage winding be segmentation laminar winding, including upper segment winding and hypomere winding, upper segment winding and hypomere winding are established ties or are parallelly connected through the unloaded tapping switch of series-parallel connection.
Furthermore, the upper winding section is provided with a wire outlet terminal a and a wire outlet terminal b, the lower winding section is provided with a wire outlet terminal c and a wire outlet terminal d, the four terminals are connected with the series-parallel unloaded tapping switch, the wire outlet terminal b is directly connected with the wire outlet terminal c through the tapping switch adjusting handle, the upper winding section and the lower winding section are connected in series, the wire outlet terminal d is directly connected with the wire outlet terminal b, the wire outlet terminal c is directly connected with the wire outlet terminal a, and the upper winding section and the lower winding section are connected in parallel.
The series-parallel connection type no-load tap changer is a WPS type tap changer, the specific model is WST VI 63/24-5x2T, the oil tank is also provided with oil tank protection elements such as a pressure gauge, an oil level indicator and a pressure release valve,
the utility model has the beneficial effects that:
through connecting tap changer at high-voltage winding, the high pressure of this transformer is the dual voltage form, can change according to actual need: when the upper and lower sections of the high-voltage winding are connected in parallel, a distribution transformer of a user can be connected, and the user can be directly used for production and other related power utilization activities through a voltage reduction process, so that the cost is reduced; when high voltage is selected, the high-voltage windings are connected in series, so that a user can transmit redundant electricity to a power grid for use, resources are well utilized, and electric power waste is avoided.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic side view of an embodiment of the present invention;
FIG. 3 is a schematic diagram of the series-parallel type no-load tap changer of the present invention connected in series with a high voltage winding;
fig. 4 is a schematic diagram of the parallel connection of the series-parallel type no-load tap changer and the high-voltage winding according to the present invention.
The method comprises the following steps of 1-an oil tank, 2-an oil pressure gauge, 3-an oil level gauge, 4-a pressure release valve, 5-an oil immersed transformer body, 6-a series-parallel connection type no-load tap switch, 7-an upper winding, 8-a lower winding, 9-a finned radiator, 10-a high-voltage sleeve and 11-a low-voltage sleeve.
Detailed Description
The transformer for high-voltage double-voltage photovoltaic shown in the attached figure 1 comprises a transformer oil tank 1, wherein a high-voltage sleeve 10 is arranged on one side outside the oil tank 1, a low-voltage sleeve 11 is arranged on the front side of the oil tank 1, a finned radiator 9 is arranged on the rear side of the oil tank 1, an oil-immersed transformer body 5 is arranged in the oil tank 1, a series-parallel connection type no-load tap-changer 6 is fixedly arranged outside a shell of the oil tank 1 and is connected with a high-voltage winding of the oil-immersed transformer body 5 through a lead wire, the high-voltage winding is a segmented layered winding and comprises an upper-section winding 7 and a lower-section winding 8, and the upper-section winding 7 and the lower-section winding 8 are connected in series or parallel through the series-parallel connection no-load tap-changer.
The upper-section winding 7 of each phase of high-voltage coil is provided with a line outgoing terminal a and a line outgoing terminal b, the lower-end winding is provided with a line outgoing terminal c and a line outgoing terminal d, the four terminals are connected with the series-parallel unloaded tapping switch, the line outgoing terminal b can be directly connected with the line outgoing terminal c through the tapping switch adjusting handle, the upper-section winding 8 and the lower-section winding 8 are connected in series, the line outgoing terminal d and the line outgoing terminal b are directly connected, the line outgoing terminal c and the line outgoing terminal a are directly connected, and the upper-section winding 8 and the lower-section winding 8 can be connected in parallel.
The series-parallel connection type no-load tap switch 6 is a WPS type tap switch, the specific model is WST VI 63/24-5x2T, and 12 terminals are respectively connected with outlet terminals of an upper section winding 8 and a lower section winding 8 of a high-voltage coil of a three-phase coil winding.
The high-voltage coil winding is arranged in the transformer oil tank 1, high-voltage conversion is realized through the series-parallel connection type no-load tap changer 6, and electric energy is transmitted through the high-voltage sleeve 10, the low-voltage sleeve 11 and the like.
Compared with the traditional transformer structure, the high-voltage coil realizes the conversion of high-voltage double voltages in a series-parallel conversion mode of the tapping switch, the structure is more reasonable, the cost is more optimized, and the proportion of the tapping voltage is unchanged after the conversion; the ampere turns of the transformer are reasonably arranged, and the short-circuit resistance is strong.
The high-voltage coil has no idle turns under two voltage operation states, and the transformer has low load loss;
when the high-voltage coil outputs 10kV, the high-voltage coil is switched to be in parallel connection through the tap switch, the number of turns is reduced, the conducting wires are in parallel connection, the requirement of current density can be met, and the phenomenon that temperature rise is caused due to overlarge current density is avoided. When the high-voltage coil is connected in series through the tap switch, the number of turns is increased, the high-voltage is 20Kv, and the high-voltage coil can also meet the current density requirement. The transformer is provided with a protection component oil temperature gauge, a pressure gauge 2, an oil level gauge 3, a pressure release valve 4, a finned radiator 9 and the like, the protection component can guarantee stable continuous operation of the transformer, and once a problem occurs, operation and maintenance personnel can find the problem in the first time and take corresponding measures to avoid accident enlargement caused by factors such as internal or external faults.
Claims (2)
1. The utility model provides a transformer for high-pressure dual-voltage photovoltaic, it includes transformer tank, and one side is provided with high-voltage bushing outside the oil tank, and the front side of oil tank sets up low-voltage bushing, and the rear side is provided with plate radiator, its characterized in that: the oil tank is internally provided with an oil-immersed transformer body, the oil tank shell is externally and fixedly provided with a series-parallel connection type no-load tap changer which is connected with a high-voltage winding of the oil-immersed transformer body, the high-voltage winding is a segmented layer winding and comprises an upper section winding and a lower section winding, and the upper section winding and the lower section winding are connected in series or in parallel through the series-parallel connection type no-load tap changer.
2. The transformer for high-voltage dual-voltage photovoltaic as recited in claim 1, wherein: the upper-section winding is provided with a wire outlet terminal a and a wire outlet terminal b, the lower-end winding is provided with a wire outlet terminal c and a wire outlet terminal d, the four terminals are connected with the series-parallel connection no-load tapping switch, the wire outlet terminal b is directly connected with the wire outlet terminal c, the upper-section winding and the lower-section winding are connected in series, the wire outlet terminal d is directly connected with the wire outlet terminal b, the wire outlet terminal c is directly connected with the wire outlet terminal a, and the upper-section winding and the lower-section winding can be connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122980219.0U CN216719680U (en) | 2021-12-01 | 2021-12-01 | High-voltage dual-voltage photovoltaic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122980219.0U CN216719680U (en) | 2021-12-01 | 2021-12-01 | High-voltage dual-voltage photovoltaic transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216719680U true CN216719680U (en) | 2022-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122980219.0U Active CN216719680U (en) | 2021-12-01 | 2021-12-01 | High-voltage dual-voltage photovoltaic transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216719680U (en) |
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2021
- 2021-12-01 CN CN202122980219.0U patent/CN216719680U/en active Active
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