考虑分布式电源并网的10 kV配电线路单相断线故障分析  

Analysis of single-phase disconnection fault of 10 kV distribution line considering distributed power grid-connected

作　　者：邵文正 刘文彬 臧家义 SHAO Wen-zheng;LIU Wen-bin;ZANG Jia-yi(School of Electrical Engineering and Automation,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China)

机构地区：[1]齐鲁工业大学(山东省科学院)电气工程与自动化学院,山东济南250353

出　　处：《齐鲁工业大学学报》2022年第5期1-9,共9页Journal of Qilu University of Technology

基　　金：国家重点研发计划智能电网技术与装备重点专项(2016YFB0900600);国家电网公司科技项目(52094017000W)。

摘　　要：架空绝缘线路在配电网的应用大大减少了单相接地故障的发生,使得断线故障已经成为一个不可忽视的问题。随着分布式电源(DG)在电网中占比越来越大,DG并网后的断线故障特征发生变化。以不接地系统为研究对象,建立了含有逆变型分布式电源(IIDG)的配电网单相断线故障模型,利用对称分量法得到的复合序网并分析其断线后的故障相各序电流等故障特征,分析了其故障特征并利用Matlab软件仿真加以验证,为断线故障的判断和保护提供了基础。The application of insulated overhead line in the distribution network greatly reduces the occurrence of single-phase grounding faults,making disconnection faults a problem that cannot be ignored.With the increasing proportion of distributed generation(DG)in the power grid,the characteristics of disconnection faults after DG are connected to the grid change.This paper takes the ungrounded system as the research object,and establishes the single-phase disconnection fault model of the distribution network with the inverter distributed generation(IIDG).The fault characteristics of each sequence current are analyzed,and the fault characteristics are analyzed and verified by Matlab software simulation,which provides a basis for the judgment and protection of disconnection faults.

关 键 词：配电网 逆变型分布式电源 单相断线故障 故障特征 

分 类 号：TM71[电气工程—电力系统及自动化]