基于分形理论的输电线路故障检测和选相  

Detection of Faults and Phase-selection Using Fractal Techniques

作　　者：杨丹[1] 刘沛[1] 王冬青[1] 刘海峰[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》2005年第15期35-39,88,共6页Automation of Electric Power Systems

摘　　要：应用分形几何理论分析了电力系统故障发生时相电压和相电流采样信号的波形特性。通过计算故障情况下相电压、相电流和模电流的分形数,提出了一种基于分形理论的故障检测和选相的新方法。经过EMTP仿真证明:这种方法能准确识别各种类型的故障并选出故障相,不受过渡电阻和电源参数的影响,能在弱馈侧正确选相。该方法原理简单、数据窗短,可以在故障发生后半个周期内正确选相,具有很高的灵敏性和可靠性。将选相算法应用于动模实测数据,选相结果正确。This paper describes application of the concepts of fractal geometry to analyze chaotic properties of different faults in power systems. An algorithm using the fractal number of phase voltages, phase currents and modular currents is presented for fault detection and phase selection. It meets the requirement of phase selection on a weak feedback side. The fault phases can be identified within 10 ms after faults. The results of EMTP simulations show the high accuracy of the proposed method.

关 键 词：输电线路 故障检测 故障选相 分形几何 

分 类 号：TM75[电气工程—电力系统及自动化]