A Method and Device for Analyzing Short-circuit Transient Force of Power Transformer Winding

A power transformer, winding short-circuit technology, applied in the direction of transformer/inductor coil/winding/connection, design optimization/simulation, calculation, etc., can solve the problem of the transformer's immature and complete technical theoretical foundation, etc., to improve the short-circuit resistance the effect of strength
CN107423528BActive Publication Date: 2020-09-29GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
Publication Date
2020-09-29

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Abstract

The embodiment of the invention discloses a power transformer winding short-circuiting transient stress analysis method and device. A three-dimensional magnetic structure coupling model of a three-phase transformer is built, static simulation of winding short-circuiting is pre-conducted on the coupling model, the stress result of a winding is obtained, according to the stress result of the winding, coil modeling is further conducted on the coupling model according to the stress result of the winding, a refined transformer model is obtained, under the three-phase short-circuiting condition, transient electromagnetic field simulation analysis is conducted on the refined transformer model, the transient stress of a single coil of the winding is analyzed, a transient stress curve showing the change of winding coils along with time is obtained, and a forceful basis is provided for the accumulative effect of a deformer under the short-circuit impact, the anti-short-circuit strength improvement of the deformer and other kinds of related research.
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Description

technical field

[0001] The invention relates to the field of short-circuit calculation of power transformer windings, in particular to a method and device for analyzing short-circuit transient force of power transformer windings. Background technique

[0002] As the primary power equipment in the power grid, the power transformer is also the core equipment connecting the power grid and users, and undertakes important power transformation tasks. However, when a short-circuit fault occurs in the transformer, the electromotive force received by the winding due to the electromagnetic effect is very large, which may easily cause damage to the winding.

[0003] At present, there is no mature and complete technology to provide foundation and support for the research of multi-physics coupling numerical simulation of transformers.

[0004] Therefore, in view of the above problems, a short-circuit transient force analysis method for power transformer windings is provided to solve the...

Claims

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