基于形态综合算法的行波差动保护方案  

A New Scheme of Travelling Wave Differential Protection Based on Morphological Integration Algorithm

作　　者：白嘉[1] 徐玉琴[1] 田彬[2] 连利宾[3] 严续峰 

机构地区：[1]电力系统保护与动态安全监控教育部重点实验室(华北电力大学),河北省保定市071003 [2]大亚湾核电运营管理有限责任公司,广东省深圳市518124 [3]包头供电局,内蒙古自治区包头市014040

出　　处：《电网技术》2006年第9期98-102,共5页Power System Technology

摘　　要：在对传统行波差动保护研究的基础上,提出了一种新的行波差动保护方案,仅利用线路两端初始方向行波波头信息构成保护动作判据。利用多分辨形态梯度变换提取波头模极大值,同时设计了一种新型形态滤波器对信号进行前置滤波,从而组成了形态综合算法。EMTP仿真验证了所提出算法的正确性与可靠性。On the basis of researching conventional travelling wave differential protection, a new scheme of travelling wave differential protection is proposed, in which the action cretedon is composed by information of initial wave fronts at both terminals. The modulus maxima of wave fronts are extracted by multi-resolution morphological gradient （MMG） transform, and a new type of morphological filter is designed to pre-filter the noise of travelling wave signals, thus a morphological integration algorithm is constituted. The results of simulation by EMTP verify the reliability of the proposed algorithm.

关 键 词：行波差动保护 多分辨形态梯度 形态综合算法 电力系统 

分 类 号：TM771[电气工程—电力系统及自动化]