多分裂式机车变压器特性分析和参数计算  

Characteristic analysis and parameter calculation of the locomotive transformer with split types of winding

作　　者：南方方 李晓松[1] 蒋云峰[1] 魏兵[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410004

出　　处：《电力科学与技术学报》2016年第1期127-132,139,共7页Journal of Electric Power Science And Technology

基　　金：湖南省自然科学基金(12JJ5053)

摘　　要：在计算多绕组变压器电感矩阵的基础上,分析4分裂式机车变压器的有关运行特性。首先,在磁场分析的基础上,计算4分裂式变压器高低压绕组8个支路的电感矩阵;然后,分析4个并联高压绕组和单个低压绕组运行时,各高压支路电流分配关系,并推导包含4个并联高压绕组与单个低压绕组变压器的等效电路,计算短路阻抗。最后,基于Matlab软件对变压器建模并仿真计算,结果表明,低压各分裂绕组分别单独运行时,高压绕组的各并联支路电流分配主要集中在具有紧密耦合高压支路的低压分裂绕组中;短路阻抗与厂方设计值较接近,且比普通变压器短路阻抗值高。Based on the calculation of the multi-winding transformer inductance matrix,the operating characteristics of a locomotive transformer with four split types of winding were analyzed.Firstly,the inductance matrix of the eight branches for four slips types winding transformer was calculated,which was based on the magnetic field analysis.And then,the relationship between current distribution of the four high voltage branches was analyzed with the condition of only one low-voltage winding running.The equivalent circuit for the transformer which had four parallel high voltage windings and one low voltage winding was deduced,and the short-circuit impedance was calculated.Finally,Matlab based simulation for the transformer was carried out.Results showed that the current of the four high-voltage parallel branches is mainly concentrated in the branch coupled tightly with the running low-voltage split winding,and the short circuit impedance is close to the design values given by the manufacturer but higher than ordinary transformer.

关 键 词：分裂式变压器 机车变压器 电感矩阵 短路阻抗 

分 类 号：TM411[电气工程—电器]