电测与仪表2017，Vol.54Issue(16)：43-49,7.
三相不平衡对配电变压器损耗影响的研究
Study on the influence of three-phase unbalance on distribution transformer loss
摘要
Abstract
In distribution network, three-phase unbalanced operation state of distribution transformer is widespread.It will increase the loss of transformer and lead to partial overheat, which has a great influence on the life of the transformer and the load capacity.In this paper, equivalent circuit model is established for two kinds of connection ways of distribution transformer-Dyn11 and Yyn0, and the loss conditions of transformer under three-phase unbalanced state was studied.Simulation and experimental results show that, the transformer who works under the situation that three-phase unbalanced makes loss increased dramatically, and with the increase of the three-phase unbalance factor, the loss curve is a quadratic function.When the three-phase unbalance factor is 50％, the wastage of the transformer will be doubled.In order to guarantee the safety and operating life of transformer, it needs to reduce its load factor in the case of unbalanced runtime.关键词
配电变压器/三相不平衡/附加损耗/负载率/零序损耗Key words
distribution transformer/three-phase unbalance/additional loss/load rate/zero sequence loss分类
信息技术与安全科学引用本文复制引用
闫志强,雷霞,何建平,刘洋..三相不平衡对配电变压器损耗影响的研究[J].电测与仪表,2017,54(16):43-49,7.基金项目
国家自然科学基金资助项目(51677020) （51677020）
教育部春晖计划项目(Z2016145) （Z2016145）
四川省电力电子节能技术与装备重点实验室开放基金(szjj2014-015) （szjj2014-015）
