CN202940114U - Single-phase sulfur hexafluoride power transformer with off-circuit tap-changer - Google Patents
Single-phase sulfur hexafluoride power transformer with off-circuit tap-changer Download PDFInfo
- Publication number
- CN202940114U CN202940114U CN 201220680187 CN201220680187U CN202940114U CN 202940114 U CN202940114 U CN 202940114U CN 201220680187 CN201220680187 CN 201220680187 CN 201220680187 U CN201220680187 U CN 201220680187U CN 202940114 U CN202940114 U CN 202940114U
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- pressure winding
- circuit tap
- tap changer
- power transformer
- voltage
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- Expired - Fee Related
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Abstract
The utility model provides a single-phase sulfur hexafluoride power transformer with an off-circuit tap-changer. The single-phase sulfur hexafluoride power transformer with the off-circuit tap-changer substantially comprises a high-voltage bushing, a shell, a high-voltage winding, a low-voltage winding for power transfer, an iron core, a low-voltage bushing, an insulating medium and the off-circuit tap-changer. A sufficient insulated space is reserved for the off-circuit tap-changer. Connection points of the off-circuit tap-changer are respectively connected with corresponding tapping terminals of the high-voltage winding. By means of connection and combination of the tapping terminals of the high-voltage winding controlled by the off-circuit tap-change, the effect on normal operation of a system by voltage fluctuation can be effectively controlled.
Description
Technical field
The utility model relates to a kind of power transformer, relates in particular to a kind of single-phase sulphur hexafluoride power transformer with off circuit tap changer, belongs to the High-Voltage Electrical Appliances fields, is a kind of transformer that has electric energy transmitting in electric power system.
Background technology
The power transformer that exists in electric power system at present generally is divided into single-phase and two kinds of three-phases, three-phase power transformer generally includes on load tap changer or off circuit tap changer, but the Monophase electric power transformer does not generally include on-load shunting switch or off circuit tap changer.
The function of single-phase sulphur hexafluoride power transformer is to utilize electromagnetic induction to be used for realizing conversion to AC energy, is a kind of static electric energy transducer, is to utilize sulfur hexafluoride gas to make the power equipment of main insulation.In the power system operation process, when the scope range of the fluctuation of voltage of electrical network larger, when perhaps actual voltage value has deviation, in the immovable situation of nominal transformation ratio, the output voltage of power transformer will be higher or on the low side, thereby cause the transmission of electric energy to be affected, when serious, other equipment of electric power system are damaged.
Summary of the invention
Problem to be solved in the utility model is: the problem for prior art exists, a kind of single-phase sulphur hexafluoride power transformer with off circuit tap changer is provided, and solve because the impact that the fluctuation of magnitude of voltage normally moves electric power system.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
a kind of single-phase sulphur hexafluoride power transformer with off circuit tap changer, mainly by bushing, housing, the high pressure winding, delivery of electrical energy low pressure winding, iron core, low-tension bushing, dielectric and off circuit tap changer form, this power transformer need to satisfy single-phase sulphur hexafluoride power transformer technical parameter and performance requirement, wherein the technical parameter of power transformer and performance requirement have: rated capacity, rated primary voltage, rated secondary voltage, short-circuit impedance, the joint group label, no-load loss, load loss, no-load current, the voltage ratio of off circuit tap changer, the tapping number.
Described delivery of electrical energy is placed in same stem unshakable in one's determination with the low pressure winding, carries out coiling by certain number of turn, is connected to the power transmission and distribution electrical network through low-tension bushing or low-voltage wiring terminal.
Described high pressure winding is outside with the low pressure winding at delivery of electrical energy, and with delivery of electrical energy be coaxial configuration with the low pressure winding.
According to the needs of insulation, described high pressure winding and delivery of electrical energy are with stopping enough insulation distances between the low pressure winding.
Described iron core and high pressure winding, delivery of electrical energy are with being shielded by metal screen between the low pressure winding.
Described bushing accesses high-voltage fence to high-voltage connection, and as external insulation, high-pressure side and low-pressure end is separated.
Described iron core and high pressure winding, delivery of electrical energy low pressure winding synthesizer body structure, the device body is protected by shell, and inside is filled with sulfur hexafluoride gas and makes dielectric.
Described off circuit tap changer leaves enough insulating spaces, each tie point of off circuit tap changer is connected with the tap terminal of corresponding high pressure winding respectively, change in voltage according to electrical network, off circuit tap changer is controlled the connection combination of the tap terminal of high pressure winding by the rotation of control lever, thereby realizes controlling the fluctuation of voltage.
Described whole single-phase sulphur hexafluoride power transformer with off circuit tap changer is all-sealed structure, provides effective assurance to the reliability of power system operation.
The beneficial effects of the utility model are: the single-phase sulphur hexafluoride power transformer of a kind of off circuit tap changer of the utility model is in the situation that without the adjusting of excitation realization to voltage, avoid having influence on due to the fluctuation of magnitude of voltage the normal operation of electric power system, effectively improved the reliability of power equipment.
Description of drawings
Fig. 1 is electrical schematic diagram of the present utility model;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is off circuit tap changer working state figure of the present utility model.
The 1-bushing; The 2-housing; 3-high pressure winding; 4-delivery of electrical energy low pressure winding; 5-is unshakable in one's determination; The 6-low-tension bushing; The 7-dielectric; The 8-off circuit tap changer; The 9-control lever;
A, b, c, d, e, f are six tie points of off circuit tap changer;
A ', b ', c ', d ', e ', f ' are six tap terminal of high pressure winding;
A, B, C, D, E are the indicating positions of five kinds of different operating states of off circuit tap changer of the present utility model.
Below in conjunction with accompanying drawing, the utility model is described further:
Embodiment
as Fig. 1, Fig. 2 and shown in Figure 3, a kind of single-phase sulphur hexafluoride power transformer with off circuit tap changer, mainly by bushing 1, housing 2, high pressure winding 3, delivery of electrical energy low pressure winding 4, unshakable in one's determination 5, low-tension bushing 6, dielectric 7 and off circuit tap changer 8 form, this power transformer need to satisfy single-phase sulphur hexafluoride power transformer technical parameter and performance requirement, wherein the technical parameter of power transformer and performance requirement have: rated capacity, rated primary voltage, rated secondary voltage, short-circuit impedance, the joint group label, no-load loss, load loss, no-load current, the voltage ratio of off circuit tap changer, the tapping number.
Described delivery of electrical energy is placed in unshakable in one's determination 5 same stem with low pressure winding 4, carry out coiling by certain number of turn, is connected to the power transmission and distribution electrical network through low-tension bushing 6.
Described high pressure winding 3 at delivery of electrical energy with low pressure winding 4 outsides, and with delivery of electrical energy be coaxial configuration with low pressure winding 4.
According to the needs of insulation, described high pressure winding 3 and delivery of electrical energy are with stopping enough insulation distances between low pressure winding 4.
Described unshakable in one's determination 5 and high pressure winding 3, delivery of electrical energy with being shielded by metal screen between low pressure winding 4.
Described bushing 1 is high-voltage connection access high-voltage fence.
Described unshakable in one's determination 5 with high pressure winding 3, delivery of electrical energy with low pressure winding 4 synthesizer body structures, the device body is protected by shell, inside is filled with sulfur hexafluoride gas and makes dielectric 7.
Described off circuit tap changer 8 leaves enough insulating spaces, six tie point a, b of off circuit tap changer 8, c, d, e, f are connected with six tap terminal a ', b ', c ', d ', e ', f ' of corresponding high pressure winding 3 respectively, change in voltage according to electrical network, off circuit tap changer 8 is controlled the connection combination of the tap terminal of high pressure winding 3 by the rotation of control lever 9, thereby realizes controlling the fluctuation of voltage.
Described whole single-phase sulphur hexafluoride power transformer with off circuit tap changer is all-sealed structure, provides effective assurance to the reliability of power system operation.
When power system voltage was normal, off circuit tap changer 8 was positioned at indicating positions C, and the two ends of control lever 9 contact with tie point c, d, and power transformer works in rated voltage; When power system voltage raises 2.5% the time, off circuit tap changer position 8 is in indicating positions B, and the two ends of control lever 9 contact with tie point b, c, and power transformer works in 102.5% of rated voltage; When power system voltage raises 5% the time, off circuit tap changer position 8 is in indicating positions A, and the two ends of control lever 9 contact with tie point a, b, and power transformer works in 105% of rated voltage; When power system voltage reduced by 2.5%, off circuit tap changer position 8 was in indicating positions D, and the two ends of control lever 9 contact with tie point d, e, and power transformer works in 97.5% of rated voltage; When power system voltage reduced by 5%, off circuit tap changer 8 was positioned at indicating positions E, and the two ends of control lever 9 contact with tie point e, f, and power transformer works in 95% of rated voltage.These operations are all to complete under the condition of product without excitation.
Claims (5)
1. single-phase sulphur hexafluoride power transformer with off circuit tap changer, mainly be comprised of with low pressure winding, iron core, low-tension bushing, dielectric and off circuit tap changer bushing, housing, high pressure winding, delivery of electrical energy, it is characterized in that: described off circuit tap changer is controlled the connection combination of the tap terminal of high pressure winding according to the change in voltage of electrical network.
2. a kind of single-phase sulphur hexafluoride power transformer with off circuit tap changer according to claim 1, it is characterized in that: described delivery of electrical energy is placed in same stem unshakable in one's determination with the low pressure winding, carry out coiling by certain number of turn, be connected to the power transmission and distribution electrical network through low-tension bushing or low-voltage wiring terminal.
3. a kind of single-phase sulphur hexafluoride power transformer with off circuit tap changer according to claim 1 is characterized in that: described high pressure winding is outside with the low pressure winding at delivery of electrical energy, and with delivery of electrical energy be coaxial configuration with the low pressure winding.
4. a kind of single-phase sulphur hexafluoride power transformer with off circuit tap changer according to claim 1, it is characterized in that: described iron core and high pressure winding, delivery of electrical energy are with being shielded by metal screen between the low pressure winding.
5. a kind of single-phase sulphur hexafluoride power transformer with off circuit tap changer according to claim 1, it is characterized in that: each tie point of described off circuit tap changer is connected with the tap terminal of corresponding high pressure winding respectively, according to the change in voltage of electrical network, off circuit tap changer is controlled the connection combination of the tap terminal of high pressure winding by the rotation of control lever.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220680187 CN202940114U (en) | 2012-12-07 | 2012-12-07 | Single-phase sulfur hexafluoride power transformer with off-circuit tap-changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220680187 CN202940114U (en) | 2012-12-07 | 2012-12-07 | Single-phase sulfur hexafluoride power transformer with off-circuit tap-changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202940114U true CN202940114U (en) | 2013-05-15 |
Family
ID=48324339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220680187 Expired - Fee Related CN202940114U (en) | 2012-12-07 | 2012-12-07 | Single-phase sulfur hexafluoride power transformer with off-circuit tap-changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202940114U (en) |
-
2012
- 2012-12-07 CN CN 201220680187 patent/CN202940114U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20191207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |