用混沌理论检测直流供电系统接地故障  

Application of Chaos Theory in Grounding Fault Detection of DC Power Supply System

作　　者：李冬辉[1] 贾巍[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《高电压技术》2005年第11期79-82,共4页High Voltage Engineering

基　　金：天津市自然基金资助项目(033601511)

摘　　要：针对电力系统中干扰信号的特性,尝试了引用混沌理论检测接地故障。对支路电流采样所得干扰信号混沌化处理,提取混沌源的分类特征,并用分形维数定量分析以判断是否存在接地故障。对含有多支路直流系统的仿真和实验验证了该方法的可行性。The exact grounding fault detection of the DC power supply system is important for electric systems, however, the disturbing signals make it difficult to exactly detect and locate the faults based on the current methods. This paper introduces the Chaos theory into the grounding fault detection. The Chaos theory is adopted to deal with the disturbing signals collected from the branch current, pick up the characteristic out of chaos source. The utilization of the Fractal dimension is aimed to analyze quantitatively. This step is to judge the occurrence of the grounding fault, Simulation and experiments on a multi-branch DC system are illustrated to prove the feasibility of the detection method.

关 键 词：直流供电系统 接地故障 混沌理论 关联维数 

分 类 号：TM862[电气工程—高电压与绝缘技术]