基于DSP的Morlet复小波微机保护算法探讨  

Research on Morlet Algorithm of Micro Protection Based on DSP

作　　者：刘丹[1] 王静[2] 汪玉凤[2] 

机构地区：[1]哈尔滨电业局通讯信息工区,黑龙江哈尔滨150010 [2]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125105

出　　处：《煤矿机电》2012年第1期67-69,72,共4页Colliery Mechanical & Electrical Technology

摘　　要：针对傅氏算法不能完全滤除电力系统故障信号中的非周期分量,尤其对常见的电流故障信号中衰减直流分量抑制能力较差的问题,提出Morlet复小波算法。与数字信号处理器DSP结合应用到电力系统微机线路保护中,较好地滤除短路故障信号的非周期分量及谐波分量,提高保护装置动作的灵敏度和精确度,提高微机保护装置的可靠性。经实验验证,达到了预期的效果。The Fourier algorithm is not able to fully filter off the non-periodic component of grid＇ s malfunction signal, especially not able to inhibit the D-C component of common fault current. Taking aim at the problem, put forward the Morlet wavelet algorithm combined with DSP （Digital Signal Processor ） and is applied to grid ＇s microcomputer protection. It preferably filters off the non-periodic and harmonic components of signal during short circuit, improves the flexibility and accuracy of protection device, and enhances the reliability of the microcomputer protection device. The tests verified the expected effect.

关 键 词：傅氏算法 Morlet复小波算法 数字信号处理器 微机保护装置 

分 类 号：TM351[电气工程—电机] TM359.4