摘要
中低压配电网的分支结构过多且节点分布较为混乱,很难精确定位故障行波。以35 kV中压配电网为例,提出一种基于行波因子差值对比的单相接地行波故障定位方法。利用Karrenbauer相模变换矩阵,分析配电网行波的传播特性,并提取模量电流及电压值的状态向量。通过模糊边界条件,求解故障行波分量在线路中的传播速度;通过速度阈值,确定线路的始端点。计算故障行波到达供电线路始端点的时间,按照时间顺序排列,定义得到时间参数最大的数值点即为故障点。仿真实验表明,所提方法可以在短时间内确定暂态行波信号,具有较高的精准度和效率。
It is difficult to accurately locate the fault traveling wave due to existence of too many branch structures and chaotic node distribution in the medium and low voltage distribution network. In this study,taking a 35 kV medium voltage distribution network as an example,a single-phase grounding travelling wave fault location method based on travelling wave factor difference comparison is proposed. Karrenbauer phase mode transformation matrix is used to analyze the propagation characteristics of the traveling wave in the distribution network,and the state vectors of modulus current and voltage values are extracted. The propagation velocity of the fault traveling wave component in the line is solved by fuzzy boundary condition. The starting point of the line is determined by the speed threshold. Calculate the time when the fault traveling wave arrives at the starting point of the power supply line,arrange it according to the time sequence,and define the maximum value point of the time parameter as the fault point. The simulation results show that the proposed method can determine transient traveling wave signals in a short time with high accuracy and efficiency.
作者
黄博
李文亮
徐学帅
李学妨
HUANG Bo;LI Wenliang;XU Xueshuai;LI Xuefang(Puer Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,Puer 665000,Yunnan,China)
出处
《电网与清洁能源》
CSCD
北大核心
2023年第1期58-63,共6页
Power System and Clean Energy
基金
中国南方电网有限责任公司科技项目(YNKJXM20190499)。
关键词
行波因子
单相接地
模糊边界条件
模量电流
模量电压
running wave factor
single ground
fuzzy boundary conditions
modulus current
modulus voltage
