小波变换构成母线新型保护  

Bus protection based on wavelet transform

作　　者：丁宇[1,2] 李海锋[1] 王钢[1] 

机构地区：[1]华南理工大学电力工程系 [2]广东省电力设计研究院,广东广州510600

出　　处：《电力自动化设备》2003年第11期30-33,共4页Electric Power Automation Equipment

摘　　要：提出了一种基于小波变换的新型母线保护。利用小波变换提取母线内、外部故障时的暂态特征,通过比较母线各回路暂态电压、电流小波变换输出波形的相似性实现母线内、外部故障的准确、快速识别。通过EMTP的大量仿真计算,验证了所提保护原理的正确性和有效性。A novel bus protection scheme is presented,in which wavelet transform technique is ap-plied to extract transient characteristics during internal and external bus faults.It identifies an in-ternal or external fault correctly an d quickly by comparing the similarities of the wavelet transform waveforms for the transient voltages an d currents of all circuits connected to the bus.The EMTP simulations show that the proposed scheme is correct and effective.

关 键 词：母线保护 小波变换 故障暂态 

分 类 号：TM773[电气工程—电力系统及自动化]