Split blowout on-load tap changer for transformer

A technology of on-load tap changer and transformer, which is applied in the field of transformer voltage regulation, and can solve problems such as inability to realize arc-free on-load tap-changer, contact ablation, increased loss, etc.

Inactive Publication Date: 2014-11-19
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problems existing in the existing technology are: the mechanical tap changer generates an arc during the tap switching process, causing contact ablation; when the vacuum tap changer adopts a fixed structure, the off-state vacuum switch is always under voltage, and it needs to be designed according to the system voltage. When the mobile structure is adopted, d

Method used

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  • Split blowout on-load tap changer for transformer
  • Split blowout on-load tap changer for transformer
  • Split blowout on-load tap changer for transformer

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0036] figure 1 It is a circuit diagram of a transformer split-type arcless on-load tap-changer in a preferred embodiment of the present invention; the transformer split-type arcless on-load tap-changer includes a tap selector and a changeover switch; The diverter switch includes a power loop, a control loop, and a control power supply unit.

[0037] The tap selector realizes the selection of the number of turns of the transformer winding, it selects the taps at no-load, and then realizes the on-load switching by the changeover switch. The moving contacts of the tap selector are connected to the static contacts of the power circuit, that is, the first static contact R1 and the second static contact R2; the ...

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PUM

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Abstract

The invention discloses a split blowout on-load tap changer for a transformer. The split blowout on-load tap changer comprises a tap selector and a diverter switch; the diverter switch comprises a power circuit, a control circuit and a control power supply; the tap selector realizes selection of the number of winding turns of the transformer, and a moving contact of the tap selector is connected with one fixed contact of the power circuit; each fixed contact of the power circuit is connected with a direct contact and a bilateral switch branch; the bilateral switch branch is formed by connecting two electronic power switches, then parallelly connecting the two connected electronic power switches with a buffer circuit and finally serially connecting the three with a fuse; buffer circuits are parallelly connected among the fixed contacts of the power circuit; the control circuit comprises a communication unit, a trigger unit and a detection unit; on and off of the bilateral switch branch are controlled according to data detected by the detection unit. Blowout switching of the split blowout on-load tap changer is realized, expansion of accidents caused by faults of a bilateral switch is prevented, devices are protected from damages, and the split blowout on-load tap changer is simple in structure and reliable in operation.

Description

technical field [0001] The invention relates to the technical field of voltage regulation of transformers, and more specifically relates to a transformer split-type arcless on-load tap changer. Background technique [0002] In the prior art, for a distribution transformer in operation, due to changes in the primary side voltage, load size and nature, the secondary side voltage may have a large change. my country's distribution transformers cover a voltage level below 35kV. In order to maintain the load voltage within the specified range and ensure the normal needs of electrical equipment, the distribution transformer must be adjusted. [0003] The basic principle of transformer on-load voltage regulation is to draw several taps from the coil on one side of the transformer, generally the high-voltage side, and switch from one tap to the other through the on-load tap changer without cutting off the load current. A tap to change the number of effective turns to adjust the volt...

Claims

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Application Information

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IPC IPC(8): H01F29/04H01H1/58
Inventor 杜海江程林
Owner CHINA AGRI UNIV
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