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On-line Monitoring Method of Three-phase Transformer Winding Deformation Based on Short-circuit Impedance Method

A three-phase transformer, short-circuit impedance method technology, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement device, etc., to achieve real-time judgment, reliable theoretical support basis, and low cost.

Inactive Publication Date: 2019-04-26
武汉振源电气股份有限公司
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Problems solved by technology

Therefore, these two types of methods are not suitable for on-line monitoring of short-circuit impedance of power transformers actually operating in the power grid.

Method used

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  • On-line Monitoring Method of Three-phase Transformer Winding Deformation Based on Short-circuit Impedance Method
  • On-line Monitoring Method of Three-phase Transformer Winding Deformation Based on Short-circuit Impedance Method
  • On-line Monitoring Method of Three-phase Transformer Winding Deformation Based on Short-circuit Impedance Method

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Embodiment Construction

[0018] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, the advantages of the present invention are clearer and easier to understand through the description.

[0019] Referring to the accompanying drawings, it can be seen that the on-line monitoring method of three-phase transformer winding deformation based on the short-circuit impedance method is characterized in that: it includes the following steps,

[0020] Step 1: Install a first voltage transformer and a first current transformer on the three lines at the input end of the three-phase transformer, respectively install a second voltage transformer and a second current transformer on the three lines at the output end of the three-phase transformer Transformer;

[0021] Step 2: The voltage values ​​detected by the three first voltage transform...

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Abstract

The invention discloses an online three-phase transformer winding deformation monitoring method based on a short circuit impedance method and relates to a method for realizing online monitoring on three-phase transformer winding deformation. According to the method, six voltage transformers, six current transformers and one signal analysis and processing system are mounted on a three-phase transformer, short circuit impedance of the three-phase transformer is calculated by the signal analysis and processing system according to voltage values detected by the six voltage transformers, current values detected by the six current transformers, and a short circuit impedance calculation formula in the three-phase transformer, the actual three-phase line short circuit impedance is compared with standard short circuit impedance by an operator, and whether a transformer winding deforms is determined. The method is advantaged in that the method is convenient to realize, cost is relatively low, online detection on a short circuit impedance parameter of the transformer can be realized, and winding deformation conditions of the three-phase transformer can be determined in real time.

Description

technical field [0001] The invention relates to a method for on-line monitoring of deformation of three-phase transformer windings, in particular to an on-line monitoring method of three-phase transformer winding deformation based on short-circuit impedance method. Background technique [0002] The power transformer is an important equipment in the power grid, and the safe operation of the power transformer is of great significance to ensure the normal operation of the power system. Transformer accidents caused by transformer winding deformation account for the vast majority of transformer accidents. Therefore, in order to detect hidden dangers of transformer accidents in time, prolong the service life of transformers, and ensure the safe and stable operation of the entire power system, an online detection method for transformer winding deformation research is of great significance. [0003] The existing theoretical research shows that the short-circuit reactance value of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/16
CPCG01B7/16
Inventor 欧立新费雯丽周宇雄袁佳歆
Owner 武汉振源电气股份有限公司
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