CN112700957A - On-load seamless regulation power transformer and regulation method thereof - Google Patents
On-load seamless regulation power transformer and regulation method thereof Download PDFInfo
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- CN112700957A CN112700957A CN202011112711.XA CN202011112711A CN112700957A CN 112700957 A CN112700957 A CN 112700957A CN 202011112711 A CN202011112711 A CN 202011112711A CN 112700957 A CN112700957 A CN 112700957A
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- winding
- power transformer
- tap
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
Abstract
The invention discloses an on-load seamless regulation power transformer and a regulation method thereof, wherein three-phase auxiliary windings are connected in a star connection mode, a counteracting winding with opposite winding directions is wound on each phase of auxiliary winding, and the tail end of the counteracting winding is connected with the central point of the auxiliary winding; more than one offset winding tap is arranged on the offset winding; the secondary winding is provided with a secondary winding tap corresponding to the head end of the offset winding and the offset winding tap; the number of turns of the secondary winding tap to the central point is the same as the number of turns of the corresponding head end of the offset winding and the number of turns of the offset winding tap to the central point; the secondary winding tap is connected with the head end of the corresponding offset winding and the offset winding tap through the regulating switch. The on-load voltage regulation method has the advantages that a counteracting winding which plays a counteracting role is added on a secondary winding of the power transformer to carry out on-load voltage regulation, and a secondary coil keeps an access state all the time in the voltage regulation process; the manufacturing process difficulty of the on-load tap changer is reduced, and the quality of the power supply voltage is ensured.
Description
The technical field is as follows:
the invention relates to power equipment, in particular to a loaded seamless regulation power transformer and a regulation method thereof.
Background art:
the on-load tap changing transformer is a transformer capable of completing tap voltage switching in load operation, and can act after a certain time delay to adjust voltage and keep the voltage stable on the premise of realizing reactive power local balance when the voltage variation exceeds a fixed value.
But the tracking speed and the response are slow during adjustment, so that delay is caused, and the quality of the power supply voltage is influenced.
The invention content is as follows:
a first object of the present invention is to provide a seamless regulation power transformer on load with no delay and guaranteed supply voltage quality.
The second purpose of the invention is to provide a method for regulating the on-load seamless regulation power transformer, which ensures the quality of the power supply voltage without delay.
The invention is implemented by the following technical scheme: the on-load seamless regulation power transformer is characterized in that three-phase auxiliary windings are connected in a star connection mode, a counteracting winding with opposite winding directions is wound on each phase of auxiliary winding, and the tail end of the counteracting winding is connected with the central point of the auxiliary winding; more than one offset winding tap is arranged on the offset winding; the secondary winding is provided with a secondary winding tap corresponding to the head end of the offset winding and the offset winding tap; the number of turns of the secondary winding tap to the central point is the same as the number of turns of the corresponding head end of the offset winding and the number of turns of the offset winding tap to the central point; and the secondary winding tap is connected with the head end of the corresponding counteracting winding and the counteracting winding tap through an adjusting switch.
The invention has the advantages that: compared with the prior art, a counteracting winding which plays a counteracting role is added on a secondary winding of the power transformer for on-load voltage regulation, in the voltage regulation process, a secondary coil keeps an access state all the time, the output voltage cannot be disconnected, and a counteracting coil after a switch is switched is a regulated voltage value; the manufacturing process difficulty of the on-load tap changer is reduced, and the quality of the power supply voltage is ensured.
Description of the drawings:
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic view of the working process of the present invention.
The specific implementation mode is as follows:
example (b): as shown in fig. 1 and 2, the on-load seamless regulation power transformer has three phases of secondary windings 1 connected in a star connection, a cancellation winding 2 with opposite winding directions is wound on each phase of secondary winding 1, and the tail end of the cancellation winding 2 is connected with the central point of the secondary winding 1; more than one offset winding taps 21 are arranged on the offset winding 2; the secondary winding 1 is provided with a secondary winding tap 11 corresponding to the head end of the offset winding 2 and the offset winding tap 21; the number of turns from the secondary winding tap 11 to the central point is the same as the number of turns from the head end of the corresponding offset winding 2 and the number of turns from the offset winding tap 21 to the central point; the secondary winding tap 11 is connected to the head end of the corresponding cancellation winding 2 and the cancellation winding tap 21 through the adjustment switch 3.
The working principle is as follows: according to the electromagnetic induction law and the right-hand rule, when the current directions are the same, the directions of the induced magnetic fields generated in the secondary winding 1 and the counteracting winding 2 with opposite winding directions are opposite, mutual counteracting effect is achieved, and the magnetic field intensity of the transformer is equal to the vector sum of the magnetic field generated by the secondary winding 1 and the magnetic field generated by the counteracting winding 2; the secondary winding 1 always works on line, and the size of a magnetic field generated by the offset winding 2 and offset with the magnetic field of the secondary winding 1 is adjusted by switching the adjusting switch 3 on the offset winding 2, so that the effect of adjusting the magnetic field intensity of the secondary winding 1 is generated, and the voltage of the secondary winding 1 is adjusted.
The method for regulating the on-load seamless regulation power transformer comprises the following steps:
judging whether the single-phase voltage at the output side of the power transformer needs to be adjusted;
subtracting the single-phase voltage value of the output side of the power transformer and the output threshold value of the power transformer, wherein the output threshold value of the power transformer is 220V; taking the absolute value of the obtained difference value as an adjustment value, and performing the second step when the adjustment value is greater than 0, wherein the adjustment value is equal to 0 and is not adjusted;
judging whether the adjusting value is in the adjusting range;
when the adjusting value is larger than the gear amplitude, performing a third step; when the adjusting value is smaller than the gear amplitude, repeating the step one; wherein the gear amplitude is 1V;
step three, judging a gear to be adjusted;
dividing the adjustment value by the gear amplitude to obtain an integer which is the gear value to be adjusted, wherein the total number of the gears is 200, and the total number of the gears is equal to the sum of the head end of the counteracting winding 2 and the number of the counteracting winding taps 21; closing the regulating switch 3 corresponding to the gear position value to realize the regulation of the single-phase voltage at the output side of the power transformer;
and step four, after the single-phase voltage at the output side of the power transformer is adjusted, repeating the step one.
Claims (5)
1. The on-load seamless regulation power transformer is characterized in that a reverse winding with opposite winding directions is wound on each phase of secondary winding, and the tail end of the reverse winding is connected with the central point of the secondary winding; more than one reverse winding tap is arranged on the reverse winding; the secondary winding is provided with a secondary winding tap corresponding to the head end of the reverse winding and the reverse winding tap; the number of turns of the secondary winding tap to the central point is the same as the number of turns of the corresponding head end of the reverse winding and the number of turns of the reverse winding tap to the central point; and the secondary winding tap is connected with the head end of the corresponding reverse winding and the reverse winding tap through an adjusting switch.
2. A method of regulating an on-load seamless regulating power transformer according to claim 1, characterized in that it comprises the steps of:
judging whether the single-phase voltage at the output side of the power transformer needs to be adjusted;
subtracting the single-phase voltage value of the output side of the power transformer from the output threshold value of the power transformer; taking the absolute value of the obtained difference value as an adjustment value, and performing the second step when the adjustment value is greater than 0, wherein the adjustment value is equal to 0 and is not adjusted;
judging whether the adjusting value is in the adjusting range;
when the adjusting value is larger than the gear amplitude, performing a third step; when the adjusting value is smaller than the gear amplitude, repeating the step one; wherein the gear amplitude is 1V;
step three, judging a gear to be adjusted;
dividing the adjustment value by the gear amplitude to obtain an integer which is the gear to be adjusted, wherein the total number of the gears is 200, and the total number of the gears is equal to the sum of the head end of the counteracting winding 2 and the number of the counteracting winding taps 21; closing the regulating switch 3 corresponding to the gear position value to realize the regulation of the single-phase voltage at the output side of the power transformer;
and step four, after the single-phase voltage at the output side of the power transformer is adjusted, repeating the step one.
3. The method of regulating an on-load seamless regulating power transformer of claim 2, wherein the output threshold of the power transformer is 220V.
4. The method for regulating the on-load seamless regulating power transformer according to any one of claims 2 or 3, wherein the gear amplitude is 1V-50V.
5. The method of claim 4, wherein the total number of gears is 4 to 200.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011112711.XA CN112700957A (en) | 2020-10-16 | 2020-10-16 | On-load seamless regulation power transformer and regulation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011112711.XA CN112700957A (en) | 2020-10-16 | 2020-10-16 | On-load seamless regulation power transformer and regulation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112700957A true CN112700957A (en) | 2021-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011112711.XA Pending CN112700957A (en) | 2020-10-16 | 2020-10-16 | On-load seamless regulation power transformer and regulation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112700957A (en) |
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2020
- 2020-10-16 CN CN202011112711.XA patent/CN112700957A/en active Pending
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