基于数学形态学的超高压输电线路暂态保护选相新方案A New Transient Protection Phase Selection Scheme for EHV Transmission Line Based on Mathematical Morphological
谭书平,卿红梅,林帆
TAN Shu-ping,QING Hong-mei,LIN Fan
摘要(Abstract)：
在分析超高压电网中发生各种故障类型模分量的特征基础上,通过提取信号暂态数据窗能量谱,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500kV双端系统进行的大量ATP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,与传统算法相比计算量较少,且具有更高的灵敏度和更快的故障响应速度。
Based on analyzing the characteristics of modulus components of different types of faults occurred in Extra High Voltage(EHV) transmission lines and calculating windowed average energy spectrum in modulus components, a new Phase Selection Scheme, which can extract fault feature of transient current by mathematical morphology gradient, is proposed. A typical 500 kV double-source EHV transmission system has been simulated by ATP to evaluate the scheme. The calculation amount of the proposed approach is less than that of traditional algorithm and the identified results are more reliable, in addition, the proposed approach is more sensitive and possesses higher fault response speed than traditional algorithm.
关键词(KeyWords)：
超高压;输电;线路;数学形态学;故障选相;暂态保护;ATP仿真
EHV; transmission line; mathematical morphology;faulty phase selection;transient protection;ATP simulation
基金项目(Foundation):
作者(Author):
谭书平,卿红梅,林帆
TAN Shu-ping,QING Hong-mei,LIN Fan
DOI: 10.19585/j.zjdl.2008.02.002
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