A transformer split type arcless on-load tap changer

An on-load tap-changer and transformer technology, applied in the field of voltage regulation of transformers, can solve the problems of contact ablation, inability to achieve arc-free on-load tap-changer, and difficult control.
CN104157433BInactive Publication Date: 2017-11-14CHINA AGRI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA AGRI UNIV
Publication Date
2017-11-14
Estimated Expiration
Not applicable · inactive patent

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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.
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Description

Technical field

[0001] The invention relates to the technical field of transformer voltage regulation, and more particularly to a transformer split type non-arc on-load tap changer. Background technique

[0002] In the prior art, due to changes in the primary side voltage, load size and nature of a distribution transformer in operation, the secondary side voltage may change significantly. my country's distribution transformers cover voltage levels 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 regulated.

[0003] The basic principle of on-load voltage regulation of transformers is to draw several taps from one side of the transformer, generally the high-voltage side of the coil, and switch from one tap to another through an on-load tap changer without cutting off the load current. One tap to change the effective number of turns to achieve the purpose of voltage r...

Claims

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