电力系统及其自动化学报2019，Vol.31Issue(3)：69-75,7.DOI:10.3969/j.issn.1003-8930.2019.03.010
带平衡绕组的分裂式变压器短路电流计算分析
Calculation and Analysis of Short-circuit Current of Split-winding Transformer with Stabilizing Winding
摘要
Abstract
The analysis of short-circuit equivalent circuit together with the calculation of the maximum value of fault cur?rent is one of the key issues for the design of a split-winding transformer with stabilizing winding. In this paper,by using symmetrical component method and finite element analysis method based on field-circuit coupling,the equivalent cir?cuit is analyzed and the short-circuit current is calculated when the transformer is under sudden short-circuit fault,e. g.,single-phase earth fault,two-phase earth fault,two-phase interphase fault,and three-phase fault. A transformer of type SFFZ10-88 000 kV·A/220 kV is taken as an example,based on which the analytical calculation and simulation analysis are performed. Results show that the short-circuit current is larger under single-and two-phase earth fault;the ampere-turns equilibrium under two-phase earth fault is related to a vector equilibrium,where the finite element analy?sis method is more applicable.关键词
平衡绕组/分裂变压器/短路电流/场路耦合/零序网络/矢量平衡Key words
stabilizing winding/split-winding transformer/short-circuit current/field-circuit coupling/zero-sequence network/vector equilibrium分类
信息技术与安全科学引用本文复制引用
李龙女,张雅倩,李岩,刘晓明..带平衡绕组的分裂式变压器短路电流计算分析[J].电力系统及其自动化学报,2019,31(3):69-75,7.基金项目
国网天津市电力公司科技项目(KJ18-1-04) （KJ18-1-04）
