On-load capacity-regulating voltage-regulating transformer

Abstract

The invention discloses an on-load capacity-regulating voltage-regulating transformer comprising an oil tank, an iron core, an on-load capacity-regulating voltage-regulating switch and a winding coil;the oil tank is a corrugated oil tank; the iron core is an amorphous alloy iron core; the winding coil is a three-phase three-winding coil which consists of a low-voltage serial-parallel connection layer, a low-voltage serial connection basic layer and a high voltage layer; the low-voltage serial-parallel connection layer, the low-voltage serial connection basic layer and the high voltage layer are sequentially concentrically sleeved on the amorphous alloy iron core; the on-load capacity-regulating voltage-regulating switch is arranged above the amorphous alloy iron core; a high voltage sleeve, a low voltage sleeve and a zero-phase sleeve are arranged on the corrugated oil tank; the high voltage layer is connected with the high voltage sleeve via the on-load capacity-regulating voltage-regulating switch; the low-voltage serial-parallel connection layer and the low-voltage serial connection basic layer are connected with the low voltage sleeve via the on-load capacity-regulating voltage-regulating switch; the low-voltage serial-parallel connection layer is also connected with the zero-phase sleeve; the three-phase three-winding coil, the amorphous alloy iron core and the on-load capacity-regulating voltage-regulating switch are all placed in the corrugated oil tank.

Description

technical field [0001] The invention relates to the field of transformers, and specifically discloses an on-load capacity-regulating and voltage-regulating transformer. Background technique [0002] The distribution transformer (distribution transformer) is the key equipment for the grid to supply power to users. At present, there are more than 10 million distribution transformers running on the grid across the country. The distribution network load changes greatly, with obvious seasonal and day-night changes. The distribution transformer has a high risk of heavy overload burning and high light and no-load power consumption. kilowatt-hour (1.5 times the annual power generation of the Three Gorges), the direct economic loss exceeds 78 billion yuan, and the impact is huge. [0003] The on-load capacity-adjusting transformer is a new type of transformer that can self-adaptively adjust the capacity of the transformer on load and keep the transformer in a safe and economical op...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an on-load capacity-adjusting voltage-regulating transformer to solve the technical defect of large transformer no-load loss in the prior art

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