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On-load tap-changer switching method, circuit and device

A technology of on-load tapping and switching, applied in output power conversion devices, circuits, transformer/inductor circuits, etc., to achieve the effect of improving stability and reducing the possibility of power failure

Pending Publication Date: 2022-01-04
SHANGHAI HUAMING POWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the above-mentioned prior art, the inventor found that there are at least the following problems in this prior art: when the on-load tap-changer operates, there is no transition branch that is always on during the contact state replacement process, Therefore, there is still a certain possibility of power failure when the on-load tap-changer operates, and there is room for improving the stability of the power supply when the on-load tap-changer operates

Method used

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  • On-load tap-changer switching method, circuit and device
  • On-load tap-changer switching method, circuit and device
  • On-load tap-changer switching method, circuit and device

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Embodiment Construction

[0092] The following is attached Figure 1-10 The application is described in further detail.

[0093] The embodiment of the present application discloses a switching method for an on-load tap changer.

[0094] refer to figure 1 and figure 2 , a method for switching an on-load tap changer includes the following steps:

[0095] A first tap branch 2 is established based on the normally closed branch 1 that conducts the power supply A and the load, and the first tap branch 2 is connected in parallel with the normally closed branch 1 to conduct the power supply A and the load. The normally closed branch 1 allows the load to get the power supply of the power supply A, the first tap branch 2 is connected in parallel with the normally closed branch 1, and the load can also get the supply of the power supply A through the first tap branch 2, so that the normally closed branch When the circuit 1 is disconnected, no arc will be generated, and the disconnection of the normally close...

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Abstract

The invention relates to the field of power switches, and discloses an on-load tap-changer switching method, circuit and device, and the method comprises the steps: building a first tap branch for connecting a power supply A with a load based on a normally-closed branch for connecting the power supply A with the load; disconnecting the normally closed branch, and establishing a second tapping branch electrically connected between the power supply B and the load; on the basis of a first preset electrical parameter detected in the second tapping branch, conducting the second tapping branch; based on a second preset parameter detected after the first tapping branch and the second tapping branch are bridged, disconnecting the first tapping branch, electrically connecting the first tapping branch between the power supply B and the load, and electrically connecting the normally closed branch between the power supply B and the load; and on the basis of a third preset electrical parameter detected in the first tapping branch, conducting the first tapping branch, disconnecting the second tapping branch, conducting the normally closed branch, and then disconnecting the first tapping branch. According to the invention, the power failure possibility during power supply switching can be reduced, and the load power receiving stability is improved.

Description

technical field [0001] The present application relates to the field of power switches, in particular to a switching method, circuit and device for an on-load tap changer. Background technique [0002] On-load tap changer refers to a voltage regulating device suitable for operation under transformer excitation or load, and used to change the tap connection position of transformer windings. The basic principle is to switch between taps in the transformer winding without interrupting the load current, thereby changing the number of turns of the winding, that is, the voltage ratio of the transformer, and finally realizing the purpose of voltage regulation. [0003] An existing on-load tap changer includes a polarity switch, a gear selection switch and a transfer branch. The gear selection switch is used to adjust the size of the tap winding connected to one end of the power supply main coil, and the polarity switch is used to change The tap winding is connected to the direction...

Claims

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Application Information

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IPC IPC(8): H01F27/42H01F29/04H02P13/00
CPCH01F27/42H01F29/04H02P13/00
Inventor 肖毅
Owner SHANGHAI HUAMING POWER EQUIP CO LTD
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