基于证据理论和信息熵的消弧线圈接地电网融合选线方法  

A Fusion Method for Ground Fault Line Detection in Compensated Power Networks Based on Evidence Theory and Information Entropy

作　　者：贾清泉[1] 石磊磊[1] 王宁[1] 董海艳[1] 

机构地区：[1]燕山大学电力电子节能与传动控制河北省重点实验室,秦皇岛066004

出　　处：《电工技术学报》2012年第6期191-197,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(50877069)

摘　　要：提出一种消弧线圈接地电网单相接地故障融合选线方法。该方法综合运用首半波、有功分量和暂态量故障特征,采用证据理论和信息熵实现融合选线。构造了定量反映线路似为故障线路程度的故障测度算法,建立了以故障测度和信息熵表示的基本信度分配函数,实现了多故障特征的证据融合选线。仿真和实测数据验证了本文选线方法的有效性,表明提出的证据融合选线方法可极大地提高选线的准确性和适应性。This paper presents a fusion scheme for ground fault line detection in neutral compensated power networks. Fault characteristics as initial abrupt wave, real power and transient are employed in the proposed fusion method. The fusion is implemented with D-S evidence theory and information entropy. Algorithm of fault measures that representing the likelihood of a line tend to be the fault one is constructed. With fault measures and information entropy, the basic probability assignment of evidence theory is formulated for fusion strategy in this paper. Simulations and field fault data prove that the proposed fusion algorithm can improve the reliability and adaptability for line to ground fault detection.

关 键 词：消弧线圈接地电网 故障选线 证据理论 信息熵 

分 类 号：TM771[电气工程—电力系统及自动化]