摘要
配网设备指示器不能真实反映故障的发生状态和具体时间信息,为此提出配网设备配电线路故障指示器自动检测。推导基于正态分布的故障节点的概率密度,计算得出最终门限值作为取值范围的判断依据,建立等效简化电路样本,初步判定电路是否出现故障以及出现故障的概率。建立馈线故障区域的新型矩阵观测定位法,根据模拟设置的容差电路以及替代和叠加公式计算可得故障检测的门限值。在故障电路中可能会出现故障信号漏报或误报等情况,进行故障信号的判断。实验表明,此故障检测结果网络收敛速度较快且故障定位准确率高。
The indicator of distribution network equipment can not truly reflect the occurrence status and specific time information of fault,so the automatic detection of distribution line fault indicator of distribution network equipment is proposed. The probability density of fault nodes based on normal distribution is deduced, and the final threshold value is calculated as the judgment basis of the value range. The equivalent simplified circuit sample is established to preliminarily determine whether the circuit has fault and the probability of fault. A new matrix observation and location method for feeder fault area is established, and the threshold value of fault detection is calculated according to the analog tolerance circuit and substitution and superposition formula. In the fault circuit, there may be missing or false alarm of the fault signal, so as to judge the fault signal. The experimental results show that the network convergence speed is fast and the fault location accuracy is high.
作者
庄黎明
陆健
谢海宁
尹建坤
ZHUANG Li-ming;LU Jian;XIE Hai-ning;YIN Jian-kun(Electric Power Research Institute of State Grid Shanghai Electric Power Company,Shanghai 200437 China;Hkust Intelligent Electrical Technology Co.,Ltd.,Hefei 230088 China)
出处
《自动化技术与应用》
2023年第2期30-32,44,共4页
Techniques of Automation and Applications
关键词
故障指示器
正态分布
馈线区域
观测矩阵
收敛速度
fault indicator
normal distribution
feeder area
observation matrix
convergence rate
