线路单相断线对Dyn11型变压器Y侧电压影响分析  

Analysis of Single-Phase Disconnection on Dyn11 Transformer Y-Side Voltage Effect

作　　者：王传皓 张浩然 WANG Chuanhao;ZHANG Haoran(Dalian University of Technology,Dalian,Liaoning 116024,China;State Grid Dalian Power Supply Company,Dalian,Liaoning 116610,China)

机构地区：[1]大连理工大学,辽宁大连116024 [2]国网大连供电公司,辽宁大连116610

出　　处：《东北电力技术》2019年第4期40-42,共3页Northeast Electric Power Technology

摘　　要：中性点不接地系统广泛应用于10kV配电线路,当线路发生单相断线故障时,断口两侧产生接地和悬空2种情况,对用电企业造成影响,特别是工厂较多地区,研究线路单相断线故障具有积极意义。大中型工厂专用变压器普遍采用Dyn11型接线方式,针对Dyn11型变压器线路单相断线故障,应用对称分量法计算变压器Y侧电压,分析结果可为采取措施及时处理故障提供依据。Neutral point ungrounded systems are widely used in 10 kV distribution lines.When single-phase disconnection faults occur on the line, both grounding and floating conditions may occur on both sides of the fault.It may affect the power users especially the regions with more factories.It is of positive significance to study the impact of disconnection faults on the power supply situation.The special transformers of large and medium-sized factories generally adopt the Dyn11 type wiring method.The symmetrical component method is used to quantify the Y-side voltage of the Dyn11 type transformer at the time of fault.The results of this analysis provide a basis for timely and appropriate measures to address failures.

关 键 词：Dyn11型变压器 线路单相断线 对称分量法 10KV配电线路 

分 类 号：TM41[电气工程—电器]