基于二维TT变换技术的高低频滤波获取故障定位仿真研究  

Simulation studies on fault location acquisition by high and low filtering frequency based on two-dimensional TT conversion technology

作　　者：刘单华 黄丹 吴轲 朱晋[3] LIU Shanhua;HUANG Dan;WU Ke;ZHU Jin(State Grid Anhui Marketing Service Center,Hefei 230088,China;Guodian Nanrui Nanjing Control System Co.,Ltd.,Nanjing,210000,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100010,China)

机构地区：[1]国网安徽省电力有限公司营销服务中心,安徽合肥230031 [2]国电南瑞南京控制系统有限公司,江苏南京210000 [3]中国科学院电工研究所,北京100010

出　　处：《粘接》2023年第5期174-178,共5页Adhesion

摘　　要：分布式光伏并网会改变配电网的潮流分布及接地故障特性,使得配电网的故障定位变的更加复杂。针对传统故障定位方法在有源配电网故障定位准确率不理想的现状,在分析分布式光伏并网对配电网故障定位影响的基础上,提出了基于TT变换的配电网故障定位数学模型,在故障零序电流的二维TT谱设计高频和低频滤波器,获取故障电流测量点的高低频暂态能量比值差异。建立含分布式光伏并网的配电网故障定位仿真模型,通过不同故障接地电阻和不同强度噪声干扰下的故障定位对比分析,验证了研究方法的有效性和优良的适应能力。The connection of distributed photovoltaic will change the power flow distribution and ground fault char⁃acteristics of distribution network,making the fault location of distribution network more complicated.Considering that the accuracy of traditional fault location method in active distribution network fault location is not satisfied,based on the analysis of the influence of distributed photovoltaic connection on distribution network fault location,a mathematical model of distribution network fault location based on TT transformation was proposed,and the high and low frequency filters were designed in the two-dimensional TT spectrum of fault zero sequence current to obtain the difference between high and low frequency transient energy ratio at the fault current measurement points.A fault location simulation model of distribution network with distributed photovoltaic grid connection was estab⁃lished,and the effectiveness and excellent adaptability of the proposed method were verified through the compara⁃tive analysis of fault location under the interference of different fault grounding resistance and noise intensity。

关 键 词：配电网 故障定位 分布式光伏 TT变换 零序电流 

分 类 号：TM773[电气工程—电力系统及自动化]