TEE (2017) 8-18 © STM Journals 2017. All Rights Reserved Page 8 Trends in Electrical Engineering ISSN: 2249-4774 (Online), ISSN: 2321-4260 (Print) Volume 7, Issue 1 www.stmjournals.com Aspect of Power Transformer Design and Optimization Chirag Parekh 1, *, Chetan Kotwal 2 , Hiral Upadhyay 3 1 Department of Electrical Engineering, R.K. University, Rajkot, Gujarat, India 1 Electrical Engineer, Atlanta Electricals Pvt. Ltd., Anand, Gujarat, India 2 Department of Electrical Engineering, Sardar Vallabhbhai Patel Institute of Technology, Vasad, Gujarat, India 3 Department of Electrical Engineering, Sardar Patel College of Engineering, Anand, Gujarat, India Abstract Transformer is one of the most important components of power system. Preliminarily it looks a simple device but from analysis and innovative point of view it is the big bank of engineering, which comprises civil, mechanical, chemical and electrical engineering. It’s the time of taking challenges and respective solution of minimizing cost of transformer without affecting customer specifications. This is only possible by design optimization process. Optimization is the process of making something better. Problems in engineering, economics and physical and social sciences entail the optimization (minimization or maximization) of an objective function subject to certain constraints (restrictions and tradeoffs). This paper deals with modern design optimization of core type power transformers. Different methods are presented to solve important transformer design problems. Keywords: Transformer design, tranmsformer design optimization(TDO), magnetic circuit, no-load losses, efficiency, sequential quadratic programming (SQP), MATLAB, TDO by iterative method *Author for Correspondence E-mail: chirag.parekh@atlantaelectricals.com INTRODUCTION Transformer has been defined by ANSI/IEEE as a static devise which consist of two or more winding, with or without magnetic core, for introducing mutual coupling between electric circuits [1]. This devise works based on electromagnetic induction to transfer electric energy at a same frequency. As we can say transformer is a main equipment or heart of a power system for transmission as well as distribution of electrical energy. The transformer design requires knowledge of electromagnetism, magnetic circuit analysis, electrical circuit analysis, loss mechanism and heat transfer. The main aim of the transformer design is to obtain the dimensions of all the parts of transformer according to the specifications given by the customer to the manufacturer [2]. Optimization of transformer design is a very complex task in which researcher has to make sure that compatibility with obligatory specifications is met, while keeping manufacturing cost low. The optimum design of transformer gives assurance to the manufacturer a product of high performance at a relatively low cost. The design can be optimized either by minimizing of manufacturing cost [3, 4] or total owning cost [5, 6] or transformer active part cost [7, 8] or active part mass [9] or losses [10, 11] or maximization of transformer apparent power [12], within some specified requirements. In this paper, the transformer design methodology and design optimization is informed in detail. Optimum transformer design based on the given specifications is obtained, using available materials economically to achieve lower cost, reduced size and better operating performance. In this paper, iterative method and MATLAB-based optimization tool has been applied to obtain optimum design of transformer. The effectiveness of the proposed iterative method and MATLAB-based optimization tool approach has been validated with the sample transformer.