The transformer of a locomotive is used as the reactor when it is powered by DC power,which is running in a dual-current system.At this time,the two low-voltage windings on the same iron core column of the transformer are connected in series to the loop for filtering,and the four high-voltage windings are open in parallel.There are four kinds of connections for four low-voltage windings with two in series;moreover the same connection also has bilateral work and unilateral work.Thus,the equivalent inductance of the transformer is worth further study.In this paper,the inductance matrix of eight windings of a four-split transformer obtained by analyzing of magnetic field is used to write the circuit equations of four different connections,and they are equivalent to a two-port network.Finally the equivalent impedance and inductance are calculated,and the results are discussed in detail and some proposal is presented.
关键词
双流制机车变压器/绕组接法/单双端工作/等效电感
Key words
double-current locomotive transformer/winding connection/single or double-ended operation mode/equivalent inductance
维普
万方数据