中国电机工程学报2011，Vol.31Issue(19)：97-104,8.
基于磁路特征的三相三柱式变压器励磁参数识别
Identification Method for Excitation Inductances of Three-phase Three-limb Transformer Based on Characteristics of Magnetic Circuit
摘要
Abstract
For the application of excitation parameters in transformer protection, the inductance identification method of three-phase three-limb transformer was proposed. Based on the characteristic of magnetic circuit, a mathematic model which links the voltages induced by the main fluxes and the currents of the windings was established. For transformers with Y/Y connection, using main flux induced voltage, the excitation inductances can be calculated accurately and steadily under conditions of normal operation, inrush current and external faults, and the characteristics are distinct from internal faults. The delta side circulating current is no part of excitation currents of three-phase three-limb transformers, so with main flux induced voltage replaced with winding voltage, the proposed method can be applied to transformers with Y/A connection directly. In this case, the excitation inductances can be calculated under inrush condition, and can be taken as identification criterion for inrush current in differential protection of the transformer. The proposed method is validated by unified magnetic equivalent circuit (UMEC) transformer model.关键词
三相三柱变压器；磁等值回路；励磁电感；励磁涌流Key words
three-phase three-limb transformer/ magnetic equivalent circuit/ excitation inductance/ inrush current分类
信息技术与安全科学引用本文复制引用
索南加乐,许立强,焦在滨,杜斌..基于磁路特征的三相三柱式变压器励磁参数识别[J].中国电机工程学报,2011,31(19):97-104,8.基金项目
国家自然科学基金项目(50907048，51037005)；高等学校博士学科点专项科研基金资助项目(20090201120018)。 （50907048，51037005）
