摘要
故障信息的识别和处理是继电保护技术的基础。针对直流牵引网故障波形,定义牵引网负荷电流的能量谱,构造模式识别的特征矢量,实现了对牵引网的状态识别与故障诊断。实验证明,能量谱分析可有效提取牵引网的故障信息,所构造的特征矢量可实现牵引网运行模式空间的划分,提高了直流牵引网继电保护的灵敏性。能量谱保护方法是一种行之有效的牵引网保护方法。
The identification and transform of fault information is the basis for the relay protection.For the fault waveforms of DC traction network,the energy spectrum of traction load current is defined,the eigenvector is constructed.The energy spectrum protection method is a new way which realizes state identification and fault diagnosis.The experiment shows the fault information can be extracted effectively by energy spectrum analysis;the mode space can be divided by the eigenvector.The protection method of energy spectrum enhances the sensitivity.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第11期164-168,共5页
Transactions of China Electrotechnical Society
基金
铁道部科技研究开发计划(2007J022)
北京市自然科学基金重点(KZ200510017012)资助项目
关键词
直流牵引网
小波包
能量谱
特征矢量
DC traction power supply
wavelet packet
energy spectrum
eigenvector
