A rectangular wire-wound winding of an amorphous transformer and its manufacturing method

Abstract

The invention discloses an amorphous transformer rectangular wire-wound winding in the field of power transmission and transformation. The amorphous transformer rectangular wire-wound winding comprises a winding framework, an inner-layer wire-wound winding, a winding oil channel and an outer-layer wire-wound winding, wherein the winding framework, the inner-layer wire-wound winding, the winding oil channel and the outer-layer wire-wound winding are sequentially arranged from inside to outside. The upper surface of the winding framework is provided with a framework arc face which is parallel to the short axis direction of the winding framework. The inner-layer wire-wound winding is bound and fixed through multiple unidirectional weftless tape which is parallel to the long axis direction of the winding framework in the framework arc face. The outer-layer wire-wound winding is bound and fixed through multiple unidirectional weftless tape which is parallel to the long axis direction of the winding oil channel in the oil channel arc face. The amorphous transformer rectangular wire-wound winding has the advantages that deformation is not prone to occurring under the action of short-circuit currents, the anti-short-circuit capacity is improved, and the anti-short-circuit capacity of the amorphous transformer can be obviously improved. The invention further discloses a manufacturing method of the amorphous transformer rectangular wire-wound winding in the field of power transmission and transformation.

Description

technical field [0001] The invention relates to a rectangular wire-wound winding of an amorphous transformer in the field of power transmission and transformation and a manufacturing method thereof. Background technique [0002] With the deepening of national energy conservation and environmental protection policies, amorphous transformers, as an energy-saving and environment-friendly transformer, are widely used in the field of power transmission and transformation. With the expansion of the market, customers' safety requirements for amorphous transformers are also rising. As a commonly used assessment test in the transformer industry, the short-circuit resistance test is an important threshold that amorphous transformers must pass. [0003] When a sudden short circuit occurs in the rectangular wire-wound winding of an amorphous transformer, the short-circuit electromotive force caused by the huge short-circuit current causes the rectangular wire-wound winding to generate s...

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Problems solved by technology

Among them, since the arc surface of the rectangular wire-wound winding is perpendicular to the clamping direction of the fixture, the arc surface of the rectangular wire-wound winding of the amorphous transformer in the conventional design does not have any reinforcement measures in the long axis direction as a whole. When the short-circuit current impacts, a radial electromotive force is generated. When the rectangular wire-wound winding is used as a low-voltage winding, it will shrink inwardly, and when it is used as a high-voltage winding, it will bulge outward. In the direction of the long axis of the rectangular wire-wound winding, due to the protection of the fixture and the winding skeleton , the electric force received basically does not have a negative impact on the transformer, but due to the lack of corresponding protection measures at the arc surface, the insulation damage at the joint between the high and low voltage winding layers is often caused, and the gap increases, which affects the normal performance and safety of the amorphous transformer.

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