Hybrid Optimum Design of a Distribution Transformer Based on 2-D FE and a Manufacturer Design Methodology

Integrating finite elements (FEs) into the design procedure of electromagnetic devices has always been a challenge for researchers and design engineering community. This paper presents the application of a hybrid method that involves the application of a conventional design methodology commonly employed by transformer manufacturers and 2-D FEs. The optimization is carried out using a genetic algorithm (GA) which allows finding the global minimum and then a deterministic algorithm is used to find the final solution. The methodology is illustrated in the design of a 1500-kVA, 13.2/0.22-kV, 60-Hz, delta-wye oil-filled distribution transformer. It is demonstrated that computation time can be reduced by using the design proposal and at the same time the FE is kept in the design process.