A lightweight design method for a 35 kV low-frequency transformer

Abstract

To Address the issue of increased core size and weight in low-frequency transformers compared to conventional power-frequency transformers， a lightweight design method for a 35 kV low-frequency transformer is proposed. This method involves multi-objective optimization of transformer losses， weight， and dimensions. Firstly， the initial structure of the low-frequency transformer is determined based on national standards and design manuals. Subsequently， transformer size， weight， and losses are selected as optimization objectives. Following this， specific optimization variables are chosen based on the characteristics of low-frequency transformers， and corresponding constraints are defined. Finally， a genetic algorithm is utilized to optimize the low-frequency transformer. A comparative analysis reveals a reduction of 11.04% in total losses， along with a decrease of 4.36% and 6.71% in core and coil weights， respectively， and a 12.85% reduction in core center distance.

Keywords

• low-frequency transformer
• multi-objective optimization
• genetic algorithm