220 kV transformer winding short-circuit current-applied stress calculation method

A technology of transformer windings and calculation methods, which is applied in calculation, instrumentation, electrical digital data processing, etc., and can solve problems such as the inability to draw force curves

Active Publication Date: 2017-10-20
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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Problems solved by technology

[0004] Since it is impossible to make a time-varying force curve for each part of the winding when analyzing the transient force of the transformer winding, a 220kV power curve that can obtain the time-varying force curve of each part of the winding is provided. The force calculation method and device when the transformer winding is subjected to short-circuit power is a technical problem to be solved by those skilled in the art

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  • 220 kV transformer winding short-circuit current-applied stress calculation method
  • 220 kV transformer winding short-circuit current-applied stress calculation method
  • 220 kV transformer winding short-circuit current-applied stress calculation method

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Embodiment Construction

[0058] The embodiment of the present invention provides a force calculation method and device when a 220kV transformer winding is subjected to short-circuit power, which lays a foundation for multi-physical field coupling numerical simulation of the transformer.

[0059] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] see figure 1 , an embodiment of a force calculation method for a 22...

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Abstract

The embodiment of the invention discloses a 220 kV transformer winding short-circuit current-applied stress calculation method. The method comprises, before transient stress analysis on a transformer winding is implemented, analyzing the overall stress state of the winding when short-circuit current reaches the peak to concluding the parts of the winding which are under high stress; then under the situation that transient current is applied, partitioning models of the weak parts in a refined mode to obtain time-dependent stress curves of the weak parts. The embodiment of the invention also discloses a 220 kV transformer winding short-circuit current-applied stress calculation device.

Description

technical field [0001] The invention relates to the field of 220kV transformer windings, in particular to a force calculation method when a 220kV transformer winding receives short-circuit power. Background technique [0002] The electromotive force on the transformer winding is generated by the interaction between the short-circuit current and the leakage magnetic field. Since the short-circuit current in the winding is large during a short-circuit, the electromotive force on the winding is proportional to the square of the short-circuit current, so the electromotive force on the winding during a short-circuit is compared to Larger than normal. Although the duration of the short-circuit transient process is very short, if the short-circuit strength of the transformer is not enough, it will be seriously damaged. [0003] At present, the MAXWELL module in the ANSYS Workbench15.0 finite element analysis software is used to simulate the electromagnetic field of the transformer...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367Y02E60/00
Inventor 李德波
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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