Arcless on-load volume regulation and voltage regulation distribution transformer

Abstract

The invention relates to a distribution transformer, in particular to an arcless on-load volume regulation and voltage regulation distribution transformer, which comprises a transformer body, an on-load volume regulation high-voltage combination switch, an on-load volume regulation low-voltage combination switch, a three-phase on-load voltage regulation combination switch and a distribution transformer monitoring judgment unit, wherein the transformer body is used for arcless on-load volume regulation and voltage regulation operation, energy transmission and voltage transformation, the on-load volume regulation high-voltage combination switch and the on-load volume regulation low-voltage combination switch are used for volume gear shift, the three-phase on-load voltage regulation combination switch is used for high-voltage gear shift, and the distribution transformer monitoring judgment unit is used for monitoring, judging and controlling the on-load volume regulation high-voltage combination switch, the on-load volume regulation low-voltage combination switch and the three-phase on-load voltage regulation combination switch. The arcless on-load volume regulation and voltage regulation distribution transformer provided by the invention has the advantages that the no-load loss of the distribution transformer is effective reduced, the power supply voltage quality of users is improved, the operation management efficiency of a distribution station zone is improved, and in addition, the goal of improving the reliable and economic operation level of the distribution station zone is reached.

Description

technical field [0001] The invention relates to distribution transformers, in particular to an arc-free on-load capacity and voltage regulation distribution transformer. Background technique [0002] Traditional distribution transformers are of single rated capacity and no-load voltage regulation type. Regardless of whether the distribution transformer is in a light-load or heavy-load state, they all operate under the same rated capacity mode. The no-load loss of the distribution transformer at light load accounts for the total distribution transformer The proportion of loss is relatively large, even as high as more than 80%. The capacity regulating transformer can have two kinds of capacity, and the ratio of large and small capacity is close to 3:1. When the load is light-loaded, it operates in the small-capacity mode, and the no-load loss is the loss value in the small-capacity mode; when the load is heavy-loaded, it operates in the large-capacity mode, and the no-load lo...

AI Technical Summary

Problems solved by technology

Switching taps of off-load voltage regulating distribution transformers requires power outage operation. The main problem is that the adjustment is not timely, and the second is that it affects the reliability of power supply

On-load tap-changing type distribution transformers are rarely used, and are mainly completed by mechanical on-load tap-changing switches and related electric components. When the tap changer is switched with load, a large arc is generated, which is easy to ablate the contacts and cause oil pollution, affecting distribution. Insulation characteristics and service life of electric transformers

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