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Site testing method for transformer winding deformation low-voltage impedance

A technology for transformer winding and field testing, applied in the field of transformers, can solve problems such as increasing the workload of field testers, and achieve reliable measurement methods and reasonable designs.

Active Publication Date: 2013-08-14
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0002] At present, when carrying out the winding deformation low voltage impedance test of the transformer, it is necessary to remove the leads on the three sides of the transformer before proceeding. Especially for the oil-oil bushing cable outlet transformer, the cable compartment must be returned to the oil and the compartment door must be opened. Can carry out wiring test work, which greatly increases the workload of on-site test personnel

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  • Site testing method for transformer winding deformation low-voltage impedance

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] A transformer winding deformation low-voltage impedance on-site testing method, using such as figure 1 The wiring diagram shown connects the traditional low-voltage impedance tester with the transformer winding. The equipment and connecting lines in the figure are all three-phase symmetrical equipment. For clarity, it is represented by a single-phase diagram according to the characteristics of the power system. The test method of the present invention comprises the method of using a low voltage impedance tester to test the low voltage impedance of transformer high voltage to medium voltage at the high voltage test point, the method of testing the low voltage impedance of transformer high voltage to low voltage at the high voltage test point and the transformer at the medium voltage test point Short-circuit impedance method for medium voltage to low vol...

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Abstract

The invention relates to a site testing method for a transformer winding deformation low-voltage impedance. The site testing method has the main technical key points of comprising a method of adopting a low-voltage impedance tester to test the low-voltage impedance of a high voltage to a middle voltage of a transformer at a high-voltage testing point, a method for testing the low-voltage impedance of the high voltage to a low voltage of the transformer at the high-voltage testing point and a method for testing the short-circuit impedance of the middle voltage to the low voltage of the transformer at a middle-voltage testing point. The site testing method for the transformer winding deformation low-voltage impedance is reasonable in design, and adopts a traditional low-voltage impedance to respectively test the low-voltage impedances of the high voltage to the middle voltage, the high voltage to the low voltage and the middle voltage to the low voltage, thus enabling the winding deformation test to be more close to the actual site operation; and a convenient, fast and reliable method is provided for the measuring of the low-voltage impedance of high and middle voltages of an oil sleeve cable transformer.

Description

technical field [0001] The invention belongs to the technical field of transformers, in particular to a field testing method for low-voltage impedance of transformer winding deformation. Background technique [0002] At present, when carrying out the winding deformation low-voltage impedance test of the transformer, it is necessary to remove the three-side leads of the transformer before proceeding. Especially for the oil-oil bushing cable outlet transformer, the cable compartment must be returned to the oil and the compartment door must be opened. The wiring test can be carried out, which greatly increases the workload of the on-site test personnel. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a field testing method for low-voltage impedance of transformer winding deformation with reasonable design, high reliability and easy use. [0004] The present invention solves its technical pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02
Inventor 王楠杨洪满玉岩唐庆华
Owner STATE GRID CORP OF CHINA
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