Method for identifying distribution transformer winding material

Abstract

The invention relates to a method for identifying a distribution transformer winding material. From the perspective of the design of a distribution transformer, the parameters of a basic material of a to-be-detected distribution transformer are acquired, the distribution transformer calculation data obtained in a design calculation manner is compared with data on a nameplate or real data, and the distribution transformer winding is judged to be aluminum material if the deviation of the calculation data and the data on the nameplate or the real data reaches a condition value; the condition value is that the current density is less than 1.5A / mm<2>, the load loss is more than 5 percent of a standard value or a nameplate value, the short-circuit impedance deviation exceeds 10%, the no-load loss exceeds the standard value or the nameplate value by 5%, the no-load loss exceeds the standard value or the nameplate value by 5%, the appearance size deviation is more than 8 percent, and the weight deviation is more than 10 percent. By adopting the method, the winding material of the distribution transformer can be conveniently, rapidly and accurately identified.

Description

technical field [0001] The invention belongs to the field of power supply and distribution, and is especially suitable for quality detection of distribution transformers. Background technique [0002] As the price of copper wires rises, the manufacturing cost of transformers increases day by day. Affected by bidding and market pressure, the profits of distribution transformer manufacturers gradually shrink. Driven by price benefits, there are many phenomena in the market where aluminum windings are used to pretend to be copper windings. The specific manifestations are all-aluminum distribution transformers (high and low voltage windings are all aluminum wires), half-copper and half-aluminum distribution transformers (only one side of the winding is aluminum. wire) and copper-clad aluminum distribution transformer. The emergence of aluminum-filled copper distribution transformers has allowed counterfeit distribution transformer manufacturers to obtain benefits through unfair...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the current problem of difficult identification of distribution transformer winding materials, and to provide a convenient, fast and accurate identification method for distribution transformer winding materials

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