QQ客服 官方微博 反馈留言

	配网高阻接地故障伏安特性分析及检测
	王宾 ; 耿建昭 ; 董新洲 ; WANG Bin ; GENG Jianzhao ; DONG Xinzhou
	2016-03-30 ; 2016-03-30
关键词	配电系统 高阻接地故障 伏安特性 最小二乘拟合 非线性识别 distribution systems high impedance faults volt-ampere characteristics least square fitting nonlinear identification TM862
其他题名	Analysis and Detection of Volt-ampere Characteristics for High Impedance Faults in Distribution Systems
中文摘要	中性点有效接地中压配电网常发生弧光高阻接地故障,短路电流小,零序保护无法动作切除,但存在的电弧易引发火灾、人身伤亡等恶性事故。传统故障检测算法一般基于电弧热平衡模型,采用基于傅里叶变换的频域信号分析方法,但在非线性电弧的强噪声环境下检测成功率较低。针对该问题,首先提出了基于固体介质电击穿原理的非线性电弧模型,分析了电路线性元件和高阻接地非线性电阻的伏安特性,从时域角度采用最小二乘线性拟合抽取故障特征,提出了基于故障电阻非线性识别的高阻接地故障检测算法。大量仿真数据和现场试验数据证明了该故障模型比传统模型更精确,且所提检测算法具有较高的灵敏性和可靠性。; High impedance faults(HIFs) often occur in effectively grounded medium voltage(MV) distribution systems, while their fault currents are too low to be tripped by zero-sequence over-current protection, but the existing arc flash is easy to produce fire hazard and personal injury. Existing HIF detection(HIFD) algorithms, which are mainly based on arc thermal equation and frequency domain analysis based on Fourier transform, however, have a relatively poorer performance because of strong noises accompanied by arc flash. Aiming to solve this problem, an accurate nonlinear resistance model, based on the solid dielectric electrical break-down theory, was proposed to simulate the fault point. After analyzing the Voltage-Current characteristics of linear electrical components and nonlinear arc resistance, a nonlinear resistance identification based HIFD algorithm was proposed with fault characteristic extraction by least square fitting. Extensive field data and simulation results testified the higher accuracy of the proposed fault model over traditional models, as well as high sensitivity and reliability of the proposed algorithm.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/142728]
专题	清华大学
推荐引用方式 GB/T 7714	王宾,耿建昭,董新洲,等. 配网高阻接地故障伏安特性分析及检测[J],2016, 2016.
APA	王宾,耿建昭,董新洲,WANG Bin,GENG Jianzhao,&DONG Xinzhou.(2016).配网高阻接地故障伏安特性分析及检测..
MLA	王宾,et al."配网高阻接地故障伏安特性分析及检测".(2016).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。