Simulation of the Inter-turn Short Circuit in Rotor Windings Based on FRA
Pang Xiao-fen · Large Electric Machine and Hydraulic Turbine · 2014
Based on frequency response analysis(FRA), simulation of the inter-turn short circuit in rotor windings is presented. Distributed capacitance and inductance parameters of a 1000MW steam turbine generator rotor winding in different conditions, which constitute the two-port network, are obtained by finite element simulation. Results show that, frequency response curves peaks almost locate around 150 kHz and inter-turn short circuits will lead resonance peaks to high frequency direction. They are positive correlation. Meanwhile, frequency response curves of windings in different slots are apparently dissimilar in resonance peaks location and amplitude due to the different parameters.