A method for calculating temperature field of reactor based on coupling of multiple physical fields

Abstract

The invention discloses a temperature field calculation method of a reactor based on multi-physical field coupling. Firstly, a three-dimensional simulation model of the reactor is established. Subsequently, based on the electromagnetic theory of field-circuit coupling, the current of each layer of reactor is calculated by the finite element method, and the winding loss of each layer is calculated,then the thermal density per unit volume of reactor is calculated. Finally, based on fluid-temperature coupling, the finite volume method is used to solve the temperature distribution of the reactorwith the unit volume heat density of the reactor as the heat source parameter. The temperature field distribution of the reactor calculated by the invention provides a theoretical basis for structuralperformance optimization of the reactor and online monitoring of the temperature.

Description

Technical field [0001] The invention belongs to the technical field of reactor multi-physics coupling calculation, in particular to a reactor temperature field calculation method based on multi-physical field coupling, in particular to a reactor temperature field based on electromagnetic-fluid-temperature multi-physics coupling Calculation method. Background technique [0002] As the main inductive electrical equipment in the power system, reactors play important roles in voltage stabilization, filtering, current limiting and reactive power compensation. When the local temperature of the reactor is too high, it will cause insulation cracking and performance degradation. In severe cases, it will cause a fire accident, which not only makes the reactor unable to operate normally and is scrapped, but also poses a great threat to the safety and stability of the power grid. Therefore, it is very necessary to study the temperature field distribution of the reactor, and the temperature ...

AI Technical Summary

Problems solved by technology

The average temperature rise method requires the measurement of the resistance value, which has large errors and low accuracy; the test method consumes manpower and material resources, the process is cumbersome, and the applicability is not high; the finite element steady-state thermal analysis method needs to determine the convective heat transfer coefficient, while the convective The heat transfer coefficient often relies on empirical trials, and the results need to be revised many times

Images