三相不对称工况下配电变压器附加损耗特性分析  

Analysis of Additional Loss Characteristics of Distribution Transformer under Three-Phase Asymmetric Conditions

作　　者：马小光[1] 刘广振[1] 张黎明[1] 郑悦[1] MA Xiaoguang;LIU Guangzhen;ZHANG Liming;ZHENG Yue(State Grid Tianjin Electric Power Corporation,Tianjin 300000,China)

机构地区：[1]国网天津市电力公司,天津300000

出　　处：《电子器件》2022年第3期716-721,共6页Chinese Journal of Electron Devices

摘　　要：配电网络三相不对称会造成配电变压器产生附加损耗,对造成配电变压器附加损耗的相关影响因素进行分析有利于合理降损。基于电路理论对配电变压器在三相对称工况及三相不对称工况下的基本特性进行了分析,探究不对称电力网络对变压器铜耗、中性线损耗以及电动机有功出力和用电设备的影响,并对由于系统不对称造成的配电网络额外损耗量进行精确计算;最后,基于MATLAB仿真软件,验证配电变压器处于不同负载不对称类型及程度下附加损耗的相关变化特性,该研究成果对降低不对称工况下的网损具有重要的指导意义。The three-phase asymmetry of power network will cause additional losses in distribution network,and the analysis of related factors that cause additional losses in distribution network will help to reduce losses reasonably.Based on circuit theory,the basic characteristics of distribution transformer under three-phase symmetry and three-phase asymmetry were analyzed,and the effects of asymmetric power network on transformer copper loss,neutral line loss,active power output of motor and power equipment were explored.Accurate calculation of additional loss in distribution network due to system asymmetry was carried out.Finally,based on the simulation software of MATLAB,the related characteristics of additional losses of distribution transformers under different load asymmetry types and degrees were verified.The research results have important guiding significance for reducing network losses under asymmetric conditions.

关 键 词：三相不对称 附加损耗 铜耗 中性线 不对称度 

分 类 号：TM711[电气工程—电力系统及自动化]