摘要
大容量发电机组的发展对继电保护提出了更高的要求,需要新的保护原理和故障检测方法。在介绍小波分析数学工具特点的基础上,分析了小波变换在同步发电机和电力变压器保护中的研究成果与应用现状,指出了存在的问题和应当进一步开展的研究方向。结果表明:小波分析的应用在很大程度上提高保护的性能,当前的研究已在理论上和实验室取得了阶段性的成果;小波分析应用于变压器差动保护中的研究,还应在现有基础上探索新的原理区分励磁涌流和内部故障电流。
The development of large generator-transformer unit makes still greater demans on that is new technology ofr relay protection is requied. In this paper, the wavelet transform is introduced,its application in the protection for generator and transformer is analyzed, and the problems and study directions are pointed out. The study show that the application of the wavelet transform has greatly improved the protection performance,obtained the phase production in theory and laboratory. The new principle of distinguishing the inrush current and fault current in the transformer＇s differential relays should be explored, the predigesting relays arithmetic and increasing calculation speed should be hard at work, in order to apply the wavelet theory into the generator＇s and transformer＇s protector in deed.
出处
《电力学报》
2009年第1期24-27,共4页
Journal of Electric Power
关键词
继电保护
小波分析
单相接地
励磁涌流
wavelet transform
relay protection
single-phase ground fault
magnetizing inrush current
