不受衰减直流分量影响的阻抗继电器新算法  

An improved Fourier algorithm of Mho relay without influence of DC decay component

作　　者：哈恒旭 王学明 张保会[3] 袁文广 

机构地区：[1]鲁能积成电子有限公司,山东济南250100 [2]山东烟台经济技术开发区,山东烟台264000 [3]西安交通大学电气学院,陕西西安710049

出　　处：《继电器》2004年第9期16-19,64,共5页Relay

摘　　要：基于傅里叶算法的阻抗继电器能够滤除和抑制高次谐波的影响,然而受衰减的直流分量的影响很大,通常采用差分滤波的方法滤除衰减直流分量的影响,由此提出一种改进的傅里叶算法,无需差分滤波,可以消除衰减直流分量的影响。EMTP仿真表明:与差分滤波相比,本算法对衰减直流分量有更好的抑制能力。The Fourier algorithm based Mho relay has advantages of eliminating and restraining the influence of high frequency harmonics, however suffers the strong influence induced by DC decay components. Therefore, differential filter is used to eliminate the DC decay component before the measured signal came into the Mho relay. This paper describes an improved Mho relay algorithm, which can naturally eliminate the infulence of DC decay component without any filters. The EMTP simulation shows that the proposed algorithm is better than the conventional processing method.

关 键 词：阻抗继电器 傅里叶算法 衰减直流分量 数字算法 差分滤波 

分 类 号：TM588.3[电气工程—电器]