Method and apparatus for building equivalent short circuit model of ultrahigh-voltage transformer

Abstract

An embodiment of invention provides a method for building an equivalent short circuit model of an ultrahigh-voltage transformer. The method comprises the steps of determining the ultrahigh-voltage transformer needed to be subjected to equivalent model design, and building a winding model having the same volume size reduction and coil forms as the ultrahigh-voltage transformer; and establishing a three-column type iron core, and concentrically mounting a high-voltage winding, a medium-voltage winding and a low-voltage winding in the winding model to the iron core in a sleeving manner. The coil form of the winding model is set according to a preset anti-short-circuit capability demand, so that the coil form of the winding model can be specifically configured according to the demand; the simulation of the ultrahigh-voltage transformer is reduced by adopting a stress and safety coefficient physical quantity equivalence principle; and the technical problems that an existing high-voltage large-capacity product of 500kV and above does not have a test capability and is high in test cost and a model meeting equivalent design requirements cannot be built can be solved. An embodiment of the invention furthermore provides an apparatus for building the equivalent short circuit model of the ultrahigh-voltage transformer.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and device for constructing an equivalent short-circuit model of an ultra-high voltage transformer. Background technique [0002] As the key equipment of the power system, the power transformer is regarded as the heart of the power grid, and its safe and stable operation is of great significance to the reliability of the power grid. With the development of modern technology, the operation level of power grid has been continuously improved, the reliability of transformer operation has been effectively improved, and the probability of equipment failure has been significantly reduced. However, at present, the problem of transformer operation safety still exists, and various faults occur from time to time, which bring huge losses to the development of the power grid and even the national economy. In the damage of 500kV transformer, the damage caused by short circuit...

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Problems solved by technology

[0011] The embodiment of the present invention provides a method and device for constructing an equivalent short-circuit model of an ultra-high voltage transformer, which is used to solve the problem that the existing 500kV and above high-voltage and large-capacity products do not have the test capability, the test cost is high, and the equivalent design cannot be constructed. technical issues with the model

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