分形在直流系统故障检测中的应用  

Application of Fractal Theory in DC System Grounding Fault Detection

作　　者：李冬辉[1] 王金凤[1] 史临潼[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津市300072

出　　处：《电力系统自动化》2005年第21期53-56,84,共5页Automation of Electric Power Systems

基　　金：天津市自然科学基金资助项目(033601511)。

摘　　要：针对直流系统中环网对接地故障检测的影响,提出利用分形的思想,初探性研究分形对环网故障的识别。在以低频注入法为基础的直流系统故障检测中,利用分形维数和凹凸度参数惟一确定的二维平面上点的位置,来识别不同情况的接地故障。该方法弥补了用单一维数识别故障的不足。给出了该方法的具体步骤,通过大量的仿真证明其有效性。According to the influence of loop net on DC system fault detection, this paper presents a new idea based on Fractal theory to study how Fractal can identify the loop net fault. Based on low frequency injection, lacunarity and Fractal dimension ascertain an exclusive point on a plane and then the fault branch can be found. This method makes up the scarcity that only Fractal dimension is used. Details of the proposed principle are given and simulation results demonstrate the effectiveness of the proposed method.

关 键 词：直流供电系统 故障检测 分形 环网 小波变换 

分 类 号：TM72[电气工程—电力系统及自动化]