Transient temperature field simulation method based on multiple commutation failures of smoothing reactor

Abstract

The invention discloses a transient temperature field simulation method based on multiple commutation failures of a smoothing reactor. The method comprises the following steps that A, an oil immersed type smoothing reactor three-dimensional geometrical model is built in a solid modeling mode on the basis of ANSYS finite element software; B, an oil immersed type smoothing reactor is subjected to heat generating analysis; C, the oil immersed type smoothing reactor is subjected to heat radiation analysis; D, the boundary conditions of temperature field simulation calculation are determined; E, the steady temperature field of the smoothing reactor under the normal work condition is calculated; F, the obtained steady temperature field result is used as an initial value of a failure transient model, then, the failure current is loaded, a step-length method is adopted, the distribution of the temperature field along with time after the failure is calculated, and the transient temperature field simulation method based on multiple commutation failures of the smoothing reactor is completed. The method has the advantage that basis is provided for checking the maloperation reason of a smoothing reactor gas relay and setting the gas checking setting valve of the smoothing reactor.

Description

technical field [0001] The invention relates to the field of power system simulation, in particular to a transient temperature field simulation method based on multiple commutation failures of a smoothing reactor. Background technique [0002] At present, my country has built a number of large-scale direct current transmission projects. With the commissioning of these direct current transmission projects, the stable operation of direct current transmission is becoming more and more important. Statistical data show that the misoperation of the gas relay of the smoothing reactor is one of the main factors of failure. But they are all normal, and there is no large amount of oil and gas produced. The specific action mechanism that caused the above faults cannot be determined. It is impossible to verify whether the thermal effect caused by the current causes the volume of the oil to expand, or the electric force generated by the sudden change of the large current deforms the ele...

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Problems solved by technology

Existing studies only consider the description of the steady-state temperature field during normal operation of the transformer, and do not involve the calculation of the transient temperature field of the transformer under fault conditions

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