摘要
在分析超高压各种故障类型模分量的特征基础上,通过提取信号暂态波头能量,提出了一种利用数学形态学梯度提取暂态电流故障特征进而识别故障类型的新方案。通过一个典型500 kV双端系统进行大量的ATP/EMTP仿真计算表明,在不同位置、过渡电阻、故障初始角的情况下发生各种故障均能正确、快速地识别故障相,与传统算法相比具有较少的计算量,且具有更高的灵敏度和更快的故障响应速度。
The paper presents a scheme of fault type identification based on extracting the fault characteristics of transient currents by mathematical morphological gradient,through analysis of characteristics of the mold component of various EHV faults,and by extracting the wavehead energy of transient signal.A large number of ATP/EMTP simulation computation of a typical 500 kV double-end system show that the fault phase can be identified correctly and rapidly if fault occurred with different locations,transitionary resistances and fault initial angles.Compared with the traditional method,it has less amount of computation,a higher sensitivity and faster response to the fault.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第16期30-34,共5页
Power System Protection and Control
关键词
超高压输电线路
数学形态学
形态学梯度
故障选相
暂态保护
ATP/EMTP仿真
EHV transmission lines
mathematical morphology
morphological gradient
fault phase selectiont
ransient protection
ATP/EMTP simulation
