新型不对称接线三相变两相平衡变压器-中国电机工程学报.PDF

第 32 卷 第 24 期 中 国 电 机 工 程 学 报 Vol.32 No.24 Aug. 25, 2012 148 2012 年 8 月 25 日 Proceedings of the CSEE ©2012 Chin.Soc.for Elec.Eng. 0258-8013 (2012) 24-0148-08 TM 85 A 470 40 文章编号： 中图分类号： 文献标志码： 学科分类号： ⋅ 新型不对称接线三相变两相平衡变压器 许志伟，罗隆福，张志文 (湖南大学电气与信息工程学院，湖南省 长沙市 410082) A Novel Asymmetrical Connection Three-phase to Two-phase Balance Transformer XU Zhiwei, LUO Longfu, ZHANG Zhiwen (College of Electrical and Information Engineering, Hunan University, Changsha 410082, Hunan Province, China) ABSTRACT: A balance transformer has the function of 压器具有满足平衡条件后两相自然解耦的优点。通过仿真分 eliminating zero sequence current and suppressing negative 析和 1kW 模型机实验，证明了理论分析的正确性和可行性。 sequence current. Different from the traditional balance 该变压器采用三相三柱式通用铁心，每相仅 2~3 个绕组，绕 transformer with two-phase or three-phase symmetrical 组和铁心结构简单，材料利用率高；同时两相系统中有公共 windings, a novel balance transformer with three-phase 点和 3 次谐波电流流通的回路，综合性能良好，适合于作为 asymmetrical windings was presented. The basic principle and 电气化铁道牵引变压器等需要两相或单相电源供电的应用 the connected scheme of the transformer were clarified ．The 场合。 mathematical model was established ．On this basis，the current 关键词：不对称接线；三相；两相；平衡变压器；零序； relationships of the primary windings and second windings 负序 were derived ．The balance condition (when the neutral current 0 引言 in the primary side is zero), and the two-phase decoupling condition were deduced. The transformer has the advantage 工矿企业和铁路交流牵引供电多采用单相或 that the two-phase decoupling condition is naturally satisfied i