基于多孔算法的小电流接地系统故障选线算法  

Fault Line Selection Algorithm in Small Current Grounding Systems Based on à Trous Algorithm

作　　者：张仲孝[1] 苗世洪[1] 林湘宁[1] 刘沛[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《电力系统自动化》2011年第1期66-70,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50677024)~~

摘　　要：在比较分析传统故障选线方法的基础上,分析了故障零序暂态电流的分布规律,提出了一种利用多孔算法分频特性与单支重构提取有效频带的故障零序暂态电流信息的方法,构造出了能反映该算法选线有效性的故障测度函数,从而实现故障选线。理论分析和大量ATP仿真试验表明所提出的算法是有效、可靠的,适用于中性点接地方式不同的小电流接地系统。With detailed comparative analysis of traditional fault line selection algorithms, this paper analyzes characteristics of transient zero sequence current and presents a fault line selection algorithm. This new algorithm extracts the effective band fault zero sequence current information through the frequency-dividing characteristics and single reconstruction of a trous algorithm. Fault measures function is also presented to reflect the effectiveness of the proposed fault line selection algorithm. Through theoretical analysis and ATP simulations, the proposed method is validated to be effective and reliable for various small current grounding systems with different neutral grounding modes.

关 键 词：小电流接地 故障选线 多孔算法 单支重构 故障测度 

分 类 号：TM862[电气工程—高电压与绝缘技术]