Amorphous alloy transformer core with cylindrical structure and vibration monitoring method thereof

Abstract

The invention discloses an amorphous alloy transformer core with a cylindrical structure and a vibration monitoring method thereof and belongs to the technical fields of design and manufacture and signal monitoring of transformers. The amorphous alloy transformer core is of a stepped cylindrical structure and is made of a high magnetic permeability pull plate and three amorphous alloy strips of which the widths are 213mm, 170mm and 142mm respectively; a main electrode of the cylindrical core takes a high magnetic permeability material as a pull plate and virtually adds one-stage core; two sides of the main electrode of the cylindrical cores are symmetrically distributed; the amorphous alloy strips of which the widths are 213mm, 170mm and 142mm respectively are sequentially arranged on two sides of the main electrode of the cylindrical cores; and the high magnetic permeability pull plate and the three amorphous alloy strips are combined according to certain proportion to enable the cross section of the core to form a stepped circular shape. In addition, according to the amorphous alloy transformer core and the vibration monitoring method thereof disclosed by the invention, due to the adoption of a soft measurement technology, an RBF (Radial-Basis Function) neural network model is constructed by capturing relevant information such as real-time voltage, current, magnetic flux and leakage flux of the transformer and the online monitoring of vibration information is realized. The results of the invention are mainly applied to a medium/high-voltage power system.

Description

technical field [0001] The invention discloses a cylindrical structure amorphous alloy transformer iron core and a vibration monitoring method thereof, belonging to the technical field of transformer design, manufacture and signal monitoring. Background technique [0002] Amorphous alloys are made by melting the main materials (boron, iron, nickel, silicon and carbon are the main selected materials), and in the liquid state after melting, they are rapidly cooled at a speed of 106K / s. After cooling, it is formed into a metal sheet from the liquid state of the alloy at one time, and its solid alloy does not have the existence of two types of lattice and grain boundary; therefore, such an alloy is also called an amorphous alloy. The amorphous alloy strip has no crystal lattice and grain boundary, its magnetization power is very small, and it has good temperature stability. [0003] In the field of transformers, as a new type of high-tech transformer core material, amorphous al...

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Problems solved by technology

The largest rectangular cross-sectional area is only 63.66% of the circular cross-sectional area, and the filling rate is low, which increases the cost of large-capacity amorphous alloy transformers

At the same time, due to the vibration of the iron core caused by the magnetostriction of the amorphous alloy strip, and the vibration of the winding caused by the dynamic electromagnetic force between the strips, the mechanical performance will be affected and noise will be generated.

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