Arrangement structure for transformer with split windings

Abstract

The invention relates to an arrangement structure for a transformer with split windings, which belongs to the technical field of transformer manufacturing. The technical scheme is that: the arrangement structure for the transformer with the split windings adopts a radial split structure; a splitting factor, namely the ratio of splitting impedance to through impedance is not less than 6.5; a magnet core has a three-phase three-column structure; and the magnet core (1), an inner low-voltage coil (2), an inner high-voltage coil (3), a voltage regulating coil (4), an outer high-voltage coil (5), an outer low-voltage coil (6) and an oil tank are arranged from inside to outside in turn. The arrangement structure for the transformer with the split windings has the advantages that: the invention is a starting/standby transformer with split windings for power plants, which can improve the anti-short circuit capability of the transformer when meeting the requirement of performance parameters; and the transformer has small change in impedance voltages during the maximal tapping and the minimal tapping. The arrangement structure for the transformer with the split windings is suitable for similar transformers of 110kv or below.

Description

Technical field: [0001] The invention relates to an arrangement structure of a split transformer and belongs to the technical field of transformer manufacturing. Background technique: [0002] The power plant uses a 110 kV start / standby transformer. The traditional structure design is that the low voltage adopts axial splitting, and the transformer has poor short-circuit resistance, especially when the transformer is in half-through operation (one low-voltage branch open circuit, one low-voltage branch operation) working condition, and when The transformer is running in the limit tap (that is, the operating voltage is at the maximum tap and the minimum tap), the impedance voltage of the transformer changes greatly, the short-circuit resistance of the transformer is poor, and the performance parameters cannot meet the requirements. Summary of the invention: [0003] The purpose of the present invention is to provide a split transformer arrangement structure, which can improve the s...

AI Technical Summary

Problems solved by technology

[0002] The 110 kV start-up / standby transformer used in the power plant, the traditional structural design is that the low-voltage adopts axial splitting, and the short-circuit resistance of the transformer is poor, especially when the transformer is in the working condition of half-through operation (one low-voltage branch is open, one low-voltage branch is running), and when The transformer operates at the limit tap (that is, the operating voltage is at the maximum tap and the minimum tap), the impedance voltage of the transformer changes greatly, the short-circuit resistance of the transformer is poor, and the performance parameters cannot meet the requirements

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