Research on Magnetic Field Optimization of Dual Body Ultra-High Voltage Shunt Reactors Based on Magnetic Shunt Structure

This paper presents a study on the optimization of the magnetic shunt structure for ultra-high voltage oil-immersed dual-body reactors. Firstly, a three-dimensional finite element simulation model was established for the reactors with rectangular and arc-shaped magnetic shunt configurations, and a magnetic field calculation method was proposed based on this model. Subsequently, the influence of magnetic shunt structure parameters on the maximum magnetic field was investigated. By varying parameters such as magnetic shunt thickness, radius, and side length, the distribution of the primary magnetic flux inside the reactor under different magnetic shunt structures was compared. Based on the research findings, an optimized design scheme for the magnetic shunt was proposed. Comparative analysis with existing magnetic shunt design schemes for reactors demonstrated that the proposed magnetic shunt structure reduced the maximum value of the arc-shaped magnetic shunt by 14.95% and the rectangular magnetic shunt by 16.84%, while maintaining the average value of the primary magnetic flux essentially unchanged. Furthermore, the proposed design achieved a more uniform distribution of the primary magnetic flux inside the reactor. This study provides valuable insights for the optimization of the magnetic shunt structure in ultra-high voltage oil-immersed reactors within the field of electrical engineering.