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Distribution transformer coil material identification method

A technology of distribution transformer and identification method, applied in the direction of transformer/inductor coil/winding/connection, material resistance, etc., can solve problems such as uneconomical and difficult implementation, and achieve convenient operation, simple implementation conditions, and identification accuracy. high effect

Active Publication Date: 2014-02-26
STATE GRID CORP OF CHINA +2
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  • Claims
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Problems solved by technology

This method is very difficult to implement on site, and it needs to be compared with standard material transformers of the same capacity, which is very uneconomical

Method used

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Embodiment Construction

[0020] Below in conjunction with the embodiment shown in the accompanying drawings, the present invention is described in detail as follows:

[0021] A method for identifying the coil material of a distribution transformer, which is used for on-site identification of the preparation material of the distribution transformer 1 to be tested, comprising the following steps: ①. Preparation of standard coils: each of which is made of pure copper, pure aluminum, and half-copper and half-aluminum High-voltage standard coils, that is, pure copper high-voltage standard coils 2, pure aluminum high-voltage standard coils 3, half-copper and half-aluminum high-voltage standard coils 4; respectively make a low-voltage standard coil with pure copper, pure aluminum, and half-copper and half-aluminum, that is, pure copper Low-voltage standard coil 5, pure aluminum low-voltage standard coil 6, half-copper and half-aluminum low-voltage standard coil 7; ②, connect the three high-voltage standard...

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Abstract

The invention discloses a distribution transformer coil material identification method. The distribution transformer coil material identification method comprises the following steps of 1, respectively preparing pure copper high-voltage and low-voltage standard coils, pure aluminum high-voltage and low-voltage standard coils, and copper-aluminum high-voltage and low-voltage standard coils having 50% copper content and 50% aluminum content, 2, connecting the three high-voltage standard coils and the three low-voltage standard coils to a heating circuit of a distribution transformer to be detected and carrying out heating simultaneously, 3, connecting the three high-voltage standard coils, the three low-voltage standard coils and the distribution transformer to be detected to a direct-current circuit in series, synchronously carrying out gradual cooling, and carrying out real-time acquisition on direct-current resistance values of the high-voltage and low-voltage standard coils, and high-voltage and low-voltage coils of the distribution transformer to be detected, and 4, comparing the direct-current resistance values and recognizing materials of the high-voltage and low-voltage coils of the detected distribution transformer. The distribution transformer coil material identification method has simple processes, is convenient for operation, is operated under the same environmental conditions, has high identification accuracy and is suitable for on-site application.

Description

technical field [0001] The invention relates to a method for identifying coil materials of distribution transformers. Background technique [0002] According to the current national standards, transformers are divided into copper transformers or aluminum transformers according to whether the coil is made of copper or aluminum, and are distinguished in the transformer model. The corresponding test standards are also formulated according to the corresponding materials. Since the transformer winding is composed of high-voltage and low-voltage coils, the conventional practice of the manufacturer is that the materials of the two coils are the same, that is, the aluminum coil transformer refers to the high and low voltage coils are made of aluminum, and the copper coil transformer refers to the high and low voltage coils. It is copper. Due to the huge consumption of distribution transformers, there are always manufacturers who make a fuss about the coil materials, using aluminum ...

Claims

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Application Information

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IPC IPC(8): G01N27/04H01F27/28
Inventor 徐青龙邹铁张曦徐建波周文华侍海军
Owner STATE GRID CORP OF CHINA
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