Abstract

With the extensive use of non-linear divices in the grid system and the increasing frequency of harmonics. Higher requirements for simulation calculations of large coil-type equipment such as dry-type air-core reactors. Conventional simulations in terms of packages and coil layers make it difficult to represent the effects of frequency rise between turns. This study establishes the establishes a finite element planar 2D symmetric structures wire-turn unit electromagnetic simulation calculation model. The results of the study show that the temperature profile of the reactor decreases gradually from top to bottom, and the surface temperature of the reactor does not exceed the standard requirements for 1.35 times the content and for the fundamental wave superimposed on the 3rd and 5th harmonics.