CN203415390U - Voltage-regulating transformer for realizing high-insulation and large-current on-load voltage regulation - Google Patents
Voltage-regulating transformer for realizing high-insulation and large-current on-load voltage regulation Download PDFInfo
- Publication number
- CN203415390U CN203415390U CN201320382777.XU CN201320382777U CN203415390U CN 203415390 U CN203415390 U CN 203415390U CN 201320382777 U CN201320382777 U CN 201320382777U CN 203415390 U CN203415390 U CN 203415390U
- Authority
- CN
- China
- Prior art keywords
- voltage
- transformer
- winding
- regulating transformer
- voltage regulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Housings And Mounting Of Transformers (AREA)
Abstract
The utility model relates to a voltage-regulating transformer for realizing high-insulation and large-current on-load voltage regulation. The voltage-regulating transformer comprises a main transformer and a voltage-regulating transformer, wherein a voltage-regulating winding is arranged in the main transformer and is in parallel connected with a primary side winding of the voltage-regulating transformer through a movable contact head of an on-load voltage regulation tapping switch; and a secondary-side winding of the voltage-regulating transformer is in series connected with a primary transformer winding. According to the utility model, the primary transformer and the voltage-regulating transformer work together, so that insulation level of a voltage-regulating coil of a low-voltage on-load voltage-regulating power transformer is lowered, current passing through the switch is reduced, and number of tapping turns satisfying voltage precision can be set easier.
Description
Technical field
The utility model relates to field transformer, the high insulation of especially a kind of realization and the large load tapchanging voltage regulating transformer of electric current.
Background technology
Electric power system, under normal running (operation) conditions, due to reasons such as operational mode, system connection or load variations, all can cause the change of system voltage.In order to guarantee quality of voltage, must adjust accordingly system voltage.
In electric power system, comparatively extensively adopt on-load tap-changing transformer to carry out pressure regulation at present.On load tap changer is that transformer is realized the indispensable parts of on-load voltage regulation, according to the difference of the bind mode of pressure regulation side, can select star to connect or corner connection switch.The on-load voltage regulating switch of at present three-phase corner connection is maximum rated is generally 600A by electric current, for the larger product of pressure regulation side rated current, can not adopt threephase switch, generally adopts three single-phase switchs to carry out respectively pressure regulation.And the price of three single-phase switchs will increase the manufacturing cost of product far above the price of a threephase switch, adopt three single-phase switchs also can increase difficulty on production simultaneously.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of and can realize high insulation and the large load tapchanging voltage regulating transformer of electric current.
The utility model solves the technical scheme that its technical problem adopts: the high insulation of a kind of realization and the large load tapchanging voltage regulating transformer of electric current, comprise main transformer and voltage regulating transformer, described a pressure regulation winding is set in main transformer, in parallel by the moving contact of on-load tap changer and the first side winding of voltage regulating transformer; The secondary side winding of described voltage regulating transformer and main transformer windings in series.
Pressure regulation winding described in the utility model is enclosed within on the iron core of main transformer, like this main flux can be on pressure regulation winding induced potential, this induced potential carries out excitation by parallel connection to voltage regulating transformer.
The secondary side winding of voltage regulating transformer described in the utility model obtains voltage by electromagnetic induction, and this Voltage Series is on the main transformer winding of main transformer.The voltage of secondary side winding changes by the change of exciting voltage, thereby plays the object that changes main transformer winding voltage.
The utility model is because the second siding ring of voltage regulating transformer and the low-voltage coil of main transformer are connected, so it passes through, is the electric current of the main transformer low-pressure side that is; And the voltage regulation coil being connected with shunting switch is because the first siding ring with voltage regulating transformer forms loop, what it passed through is voltage regulating transformer primary side current, so select suitably the no-load voltage ratio of voltage regulating transformer one or two sides the electric current by switch can be arranged in a very little value.
The beneficial effects of the utility model are, solved the defect existing in background technology, adopt main transformer and voltage regulating transformer co-operation, reduced low-voltage loaded pressure regulation power transformer voltage regulation coil insulation level, reduced the electric current by switch, the tap number of turn that meets voltage accuracy is also more easily set.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the elementary diagram of the present invention's one phase;
Fig. 2 is the elementary diagram of three-phase of the present invention.
Embodiment
With preferred embodiment, the utility model is described in further detail by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model is only described in a schematic way, so it only show the formation relevant with the utility model.
As shown in Figure 1, 2 a pressure regulation winding 5 is set in main transformer 4, in parallel by the moving contact of on-load tap changer 6 and the first side winding 2 of voltage regulating transformer 1, the secondary side winding 3 of voltage regulating transformer 1 is connected with main transformer winding 7.Because pressure regulation winding 5 is enclosed within on the iron core of main transformer 4, main flux can be on pressure regulation winding 5 induced potential, this induced potential carries out excitation by parallel connection to voltage regulating transformer 1, the secondary side winding 3 of voltage regulating transformer 1 obtains voltage by electromagnetic induction, this Voltage Series is on main transformer 4 windings 7, the voltage of secondary side winding 3 changes by the change of exciting voltage, thereby plays the object that changes main transformer 4 winding 7 voltages.
Because the secondary side winding 3 of voltage regulating transformer 1 is connected with main transformer 4 windings 7, so it passes through, be the electric current of main transformer 4 windings 7; And the pressure regulation winding 5 being connected with on-load tap changer 6 is because the first side winding 2 with voltage regulating transformer 1 forms loop, what it passed through is voltage regulating transformer primary side current, so select suitably the transformation ratio of voltage regulating transformer 1 one two side windings the electric current by switch can be arranged in a very little value.By pressure-control circuit, also can be known in addition, the voltage of voltage regulating transformer 1 secondary side winding 3 is exactly the voltage of the whole tap section of main transformer 4 winding 7, according to transformation ratio, can obtain the rated voltage of 1 windings 2 of voltage regulating transformer, due in parallel with main transformer 4 pressure regulation windings 5, this is worth the namely voltage of pressure regulation winding 5, with it, divided by the circle electromotive force of main transformer 4, can draw the number of turn of pressure regulation winding 5.
The secondary side winding leading-out terminal T2W0 of voltage regulating transformer W phase is connected with main transformer V phase winding leading-out terminal 1V, the secondary side winding leading-out terminal T2V0 of voltage regulating transformer V phase is connected with main transformer U phase winding leading-out terminal 1U, the secondary side winding leading-out terminal T2U0 of voltage regulating transformer U phase is connected with main transformer W phase winding leading-out terminal 1W, the first side winding leading-out terminal T1W0 of voltage regulating transformer W phase, the first side winding leading-out terminal T1V0 of voltage regulating transformer V phase, the first side winding leading-out terminal T1U0 of voltage regulating transformer U phase and the shunting tap of on load tap changer link together as neutral point 0 ground connection.
How rational voltage regulating transformer is set is the key that realizes the inventive method, below will illustrate by example.
On-load tap-changing transformer performance parameter of example is as follows:
Rated capacity: 100000kVA
High-pressure side rated voltage and tapping range: (26 ± 8 * 1.25%) kV
Low-pressure side rated voltage: 10.5kV
Connect group label: Dyn1
The specified phase current in high-pressure side is 1282.1A as calculated, if adopt the words of three-phase corner connection on-load voltage regulating switch cannot meet so large electric current, and adopts three single-phase switchs, and manufacturing cost will improve greatly.And adopt said method of the present invention, can well overcome the above problems.
First define the rated current of on-load shunting switch, suppose to select the switch of conventional 500A.The electric current of minus tapping shelves is 1.1 times (1+8 * 1.25%) of specified shelves, the rated current of pressure regulation side winding is 500/1.1=454.5A, therefore the transformation ratio of voltage regulating transformer minimum is 1282.1/454.5=2.82, the voltage of voltage regulating transformer secondary side is 26 * (8 * 1.25%)=2.6kV=2600V, the voltage of primary side is 2600 * 2.82=7332V, due to the first side winding of voltage regulating transformer and the pressure regulation winding parallel of main transformer, so the voltage of pressure regulation winding is also 7332V.Relevant 100000 * (8 * the 1.25%)=10000kVA that is of voltage range of the capacity of voltage regulating transformer and pressure regulation side.
What in above specification, describe is embodiment of the present utility model, various not illustrating is construed as limiting flesh and blood of the present utility model, person of an ordinary skill in the technical field read after specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence and the scope of utility model.
Claims (3)
1. realize high insulation and the large load tapchanging voltage regulating transformer of electric current for one kind, comprise main transformer and voltage regulating transformer, it is characterized in that: described a pressure regulation winding is set in main transformer, in parallel by the moving contact of on-load tap changer and the first side winding of voltage regulating transformer; The secondary side winding of described voltage regulating transformer and main transformer windings in series.
2. the high insulation of a kind of realization as claimed in claim 1 and the large load tapchanging voltage regulating transformer of electric current, is characterized in that: described pressure regulation winding is enclosed within on the iron core of main transformer.
3. the high insulation of a kind of realization as claimed in claim 1 and the large load tapchanging voltage regulating transformer of electric current, is characterized in that: the secondary side winding of described voltage regulating transformer obtains voltage by electromagnetic induction, and this Voltage Series is on the main transformer winding of main transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320382777.XU CN203415390U (en) | 2013-06-28 | 2013-06-28 | Voltage-regulating transformer for realizing high-insulation and large-current on-load voltage regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320382777.XU CN203415390U (en) | 2013-06-28 | 2013-06-28 | Voltage-regulating transformer for realizing high-insulation and large-current on-load voltage regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203415390U true CN203415390U (en) | 2014-01-29 |
Family
ID=49978264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320382777.XU Expired - Lifetime CN203415390U (en) | 2013-06-28 | 2013-06-28 | Voltage-regulating transformer for realizing high-insulation and large-current on-load voltage regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203415390U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104952602A (en) * | 2014-03-28 | 2015-09-30 | 特变电工股份有限公司 | Electric power auto-transformer and high voltage regulating method thereof |
| CN110556242A (en) * | 2019-09-16 | 2019-12-10 | 泰州海田电气制造有限公司 | On-load tap changer and voltage regulation method |
| CN113885390A (en) * | 2021-10-15 | 2022-01-04 | 湖南恩智绿源电子技术有限公司 | Method for ensuring current control precision after parallel connection of power supplies by adopting digital-analog mixing |
-
2013
- 2013-06-28 CN CN201320382777.XU patent/CN203415390U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104952602A (en) * | 2014-03-28 | 2015-09-30 | 特变电工股份有限公司 | Electric power auto-transformer and high voltage regulating method thereof |
| CN110556242A (en) * | 2019-09-16 | 2019-12-10 | 泰州海田电气制造有限公司 | On-load tap changer and voltage regulation method |
| CN110556242B (en) * | 2019-09-16 | 2024-04-12 | 泰州海田电气制造有限公司 | On-load voltage regulating transformer and voltage regulating method |
| CN113885390A (en) * | 2021-10-15 | 2022-01-04 | 湖南恩智绿源电子技术有限公司 | Method for ensuring current control precision after parallel connection of power supplies by adopting digital-analog mixing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105655110B (en) | A kind of single oil box double body auto-transformer | |
| CN105336481A (en) | 36-level high-precision capacitance and voltage adjusting transformer for distributing line | |
| CN203415390U (en) | Voltage-regulating transformer for realizing high-insulation and large-current on-load voltage regulation | |
| CN103680883A (en) | 500kV-level split on-load voltage regulation power transformer | |
| CN104752043A (en) | Voltage regulating method for three-phase loaded voltage-regulating self-coupling transformer | |
| CN210110504U (en) | Two-stage switching quick response type self-excitation magnetically controlled reactor | |
| CN103515071B (en) | A kind of high pressure raw fine regulation on-load voltage regulation | |
| CN103606445A (en) | Method for effectively reducing current passing through on-load tap-changer of transformers | |
| CN201508760U (en) | On-load tap changer of high voltage D connection | |
| CN102647093A (en) | Novel dual power on-load voltage regulation rectifier transformer | |
| CN103928225B (en) | A kind of method transforming 220kV off circuit tap changing transfor mer device body as ULTC device body | |
| CN104953909B (en) | The middle pressure pressure regulation method and power auto-transformer of power auto-transformer | |
| CN101404202A (en) | Low-pressure side on-load tap changer | |
| CN102360848A (en) | Method for realizing high-insulation and large-current on-load voltage regulation, and regulating transformer | |
| CN205122371U (en) | 36 level high accuracy distribution lines transfers and holds powerstat | |
| CN104361984B (en) | The constant flux voltage regulation structure of supertension self coupling power transformer | |
| CN113809753A (en) | Voltage stabilizer for encapsulated coil transformer | |
| CN109727753A (en) | A kind of extra-high voltage auto-transformer of pressure regulation excitation | |
| CN203588102U (en) | Three-winding compensation type alternating voltage stabilizing device | |
| CN104952602A (en) | Electric power auto-transformer and high voltage regulating method thereof | |
| CN202586763U (en) | New type dual-power on-load voltage regulating and rectifier transformer | |
| CN106158308A (en) | A kind of self coupling power transformer on-load voltage regulation structure cancelling the tertiary winding | |
| CN201805356U (en) | Voltage regulation type rectifier transformer | |
| CN102403910A (en) | Voltage-regulating rectifier transformer | |
| CN203180458U (en) | Self-powered ice-melting electric reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140129 |
|
| CX01 | Expiry of patent term |