Rapid Measurement of Power Transformer Winding DC Resistance
Xiao Fei Luo, Xian Xia, Kai Jun Wu · Applied Mechanics and Materials · 2013
Aim at the electric power transformer with inductance is large, resistance is small, the inherent characteristics of the large time constant, a fast measurement scheme of power transformer winding DC resistance is proposed. The scheme adopts the increase the measurement circuit loop resistance mutation method, in which the circuit transition process from a time constant is forced to another time constant, to realize the rapid measurement of winding DC resistance in power transformer. Simulation results show the effectiveness of the scheme.