三相负荷不平衡对配变出口电压影响的仿真分析  

Simulation Analysis of the Impact of Unbalanced Three-phase Load on Distribution Transformer's Outlet Voltage

作　　者：唐泽洋[1] 王涛[1] 蔡德福[1] 曹侃[1] 忻俊慧[1] 周鲲鹏[1] 

机构地区：[1]国网湖北省电力公司电力科学研究院,湖北武汉430077

出　　处：《湖北电力》2017年第3期14-18,共5页Hubei Electric Power

基　　金：国网湖北省电力公司科技项目(52153216001H)

摘　　要：为研究三相负荷不平衡对配变出口电压的影响,通过建立ATP-EMTP仿真模型,研究了不同负荷参数下配变出口电压。仿真结果表明:配变出口三相电压同时受负荷有功和无功功率的影响,三相负荷不平衡时,会导致配变出口三相电压不平衡,但配变出口三相电压并不一定表现为负荷重的一相电压低、负荷轻的一相电压高,仿真和实测结果吻合。三相负荷不平衡时,理论上配变高压侧三相电压存在6种大小关系。In order to study the influence of unbalanced three-phase load on distribution transformer’s outlet voltage,the ATP-EMTP simulation model is built,and outlet voltage of distribution transformer under different load parameters is researched.The simulation results show that both active and reactive power have influence on distribution transformer’s outlet voltage simultaneously.The unbalanced three-phase load will cause outlet three-phase voltage unbalance of distribution transformer.The simulation results agree well with the measured results.It’s actually not the case that the heavier the load,the lower the phase voltage whlile the lighter the load,the higher the phase voltage.When the three-phase load is unbalanced,there are 6 kinds of relationship between the distribution transformer’s outlet three phase voltage.

关 键 词：三相负荷 不平衡 配变出口电压 无功功率 ATP-EMTP仿真模型 

分 类 号：TM72[电气工程—电力系统及自动化]