FEM Based Preliminary Design Optimization in Case of Large Power Transformers

Abstract

Since large power transformers are custom-made, and their design process is a labor-intensive task, their design process is split into different parts. In tendering, the price calculation is based on the preliminary design of the transformer. Due to the complexity of this task, it belongs to the most general branch of discrete, non-linear mathematical optimization problems. Most of the published algorithms are using a copper filling factor based winding model to calculate the main dimensions of the transformer during this first, preliminary design step. Therefore, these cost optimization methods are not considering the detailed winding layout and the conductor dimensions. However, the knowledge of the exact conductor dimensions is essential to calculate the thermal behaviour of the windings and make a more accurate stray loss calculation. The paper presents a novel, evolutionary algorithm-based transformer optimization method which can determine the optimal conductor shape for the windings during this examined preliminary design stage. The accuracy of the presented FEM method was tested on an existing transformer design. Then the results of the proposed optimization method have been compared with a validated transformer design optimization algorithm.

Transformer Model Identification by Ārtap

“…The Ārtap framework [20,21] is a MIT licensed robust design optimization tool, written in Python (Ārtap is available for downloading from the web page of [22]). The development of the framework is motivated by an industrial brazing process, where several multi-physical Finite Element Method (FEM) based solvers, Neural networks and Model Order Reduction tools have to be used together to make an optimized design of an inductor [23][24][25][26]. Ārtap is designed to provide a collection of numerical solvers and optimization tools for robust design optimization of electrical machines [19,[26][27][28][29].…”

Analisa Stray Losses Pada Struktur Transformator Daya Satu Fasa 275 Kv 83.3 MVA

“…Sebelum melakukan simulasi perlu membuat moden dan model bisa dibuat secara langsung pada software ansys atau dapat mengambil dari software lain [7], untuk menunjang perhitungan tersebut menggunakan data solidworks, parameter yang dibutuhkan dimasukan seperti:…”

Design Analysis of High Frequency Linear Transformer with Ārtap Framework

“…There are many papers, which presents loss prediction and the design of magnetic components [1,2,4,7,[9][10][11][12][13][14][15][16][17][18][19][20][21]. Most of the design methodologies are still based on the Dowell formulas, which has certain limitations [1,9,11,22] and most of the conventional converter designs applies sandwich windings to increase the coupling of the transformer [20].…”