Driving-Point Impedance and Particle Swarm Optimization Based Circuit Synthesis of Power Transformer Winding

Power transformer constitutes an integral part of the power system. To assure its continuous operation, various condition monitoring techniques are being used. Frequency Response Analysis (FRA) is used to detect mechanical deformations in power transformer. Detailed modelling of transformer winding is done in order to obtain internal physical structure (equivalent ladder circuit model). In this paper, Particle Swarm Optimization (PSO) method is used to synthesize equivalent circuit model of power transformer winding. Initially, driving-point impedance is obtained by performing FRA and then, circuit synthesis is performed using PSO. This paper also describes approximation of various parameters of lumped circuit and leads the solution towards best optimum solution with the help of appropriate constraints. The accuracy and reliability of proposed method is found satisfactory.