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Converter transformer temperature field digital twinborn model construction method

A converter transformer and construction method technology, applied in design optimization/simulation, calculation, computer-aided design, etc., can solve problems such as reflecting the distribution characteristics of the converter transformer temperature field

Active Publication Date: 2021-09-14
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current methods, including infrared imaging and optical fiber temperature measurement, are difficult to intuitively and comprehensively reflect the distribution characteristics of the converter rheological temperature field

Method used

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  • Converter transformer temperature field digital twinborn model construction method
  • Converter transformer temperature field digital twinborn model construction method
  • Converter transformer temperature field digital twinborn model construction method

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Embodiment 1

[0055] Such as figure 1 As shown, the present invention discloses a method for constructing a digital twin model of the temperature field of a converter transformer, including the following process:

[0056] A. Construct a full-scale model of the converter transformer, apply boundary conditions to the full-scale model, and obtain the temperature field distribution at different times by solving to form a snapshot matrix.

[0057] The snapshot matrix is:

[0058]

[0059] where x i is the i-th temperature field snapshot, which stores the temperature field distribution of the converter transformer at the i-th moment; X and X'∈R m×n, m represents the dimension of the snapshot, that is, the number of grid points in the numerical calculation, n represents the number of snapshots, that is, the number of sampling moments in the numerical calculation of the temperature field; A is the linear relationship matrix between the temperature fields at adjacent moments; the temperature fi...

Embodiment 2

[0100] This embodiment discloses a method for constructing a digital twin model of a converter transformer temperature field, which is substantially the same as the method for constructing a digital twin model of a converter transformer temperature field in Embodiment 1, and is further limited. In this embodiment, the method for selecting the extracted modes is: randomly selecting a predetermined number of modes whose energy ratio reaches a predetermined value.

Embodiment 3

[0102] This embodiment discloses another construction method of the digital twin model of the temperature field of the converter transformer, which is roughly the same as the construction method of the digital twin model of the temperature field of the converter transformer in the second embodiment. The method of state selection.

[0103] In this embodiment, when calculating the modal energy ratio, the extracted modes are sorted in descending order of the energy ratio, and when the temperature field is reconstructed to calculate the reduced-order model, a predetermined number of modes that are sorted first are selected. state.

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Abstract

The invention discloses a converter transformer temperature field digital twinborn model construction method. The method comprises the steps of constructing a full-size model of the converter transformer, applying boundary conditions, further solving to obtain temperature field distribution at different moments, and forming a transient image matrix; taking the independently distributed Gaussian random measurement matrix as an observation matrix, and compressing the original transient image matrix; based on a dynamic mode decomposition method, extracting the mode of the compressed transient image matrix, and calculating the energy ratio of each order of mode; determining a modal order required for finally constructing the digital twin model by taking the criterion that the sum error of the temperature field information after modal reconstruction and the original temperature field information is less than 5% and the reconstruction time is at the second level, and if the result does not pass, re-selecting the modal order for reconstruction, and using the temperature field model obtained through modal reconstruction as a temperature field digital twinborn model. The method can serve construction of the converter transformer temperature field digital twin model, and the operation state of the converter transformer can be mastered accurately in real time.

Description

technical field [0001] The invention relates to the field of state evaluation of electric equipment, in particular to the field of digital twin model construction of converter transformers. Background technique [0002] Thanks to the vigorous development of modeling technology, sensor accuracy and communication efficiency, the application of digital twins in many industries has ushered in a blowout growth. At present, digital twins have been successfully applied in the fields of aerospace, smart cities, and smart manufacturing, and have achieved remarkable benefits. In the power industry, building a multi-physics digital twin model for power equipment and accumulating multi-physics data throughout the life cycle is of great significance for the digital and intelligent development of power equipment. The converter transformer is the core equipment in the HVDC transmission line. Studying the temperature field distribution characteristics and hot spot temperature rise during i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27G06F119/08
CPCG06F30/27G06F2119/08
Inventor 陈咏涛田鹏江金洋杨帆尹心程晓吕小红向菲陈涛厉仄平王晋宇钱基业
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST