D-S证据理论在小电流接地系统单相接地故障选线中的应用  

Application of D-S Evidence Theory to Selecting Single Phase-to-Ground Fault for Small Current Grounding Power Systems

作　　者：司春旺[1] 宋家骅[1] 林庆海[1] 程晓磊[1] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《电力科学与工程》2006年第4期48-51,共4页Electric Power Science and Engineering

摘　　要：小电流接地系统发生单相接地故障后,当故障特征量非常明显时,选线结果才比较可靠,当其特征量很微弱时,选线结果则可能是错误的;在故障后不同时段,故障特征所表现的强弱程度的不同,对选线结果也会产生很大影响。针对这一特点,提出了一种充分利用故障信息的多判据多周期的选线方法,运用D-S证据理论实现多种判据信息融合,从而使选线性能得到很大提高。苛刻条件下的仿真算例证实了该方法的正确性和有效性。In view of the complicated characteristic after singlephase earth faults the small current grounding power systems have, a circuit selection method with multi-criteria and multi-period is proposed. which makes full use of fault information, and realizes the multi-criteria information fusion using the D-S evidence theory. The performance of circuit selection can be improved. Simulations under harsh conditions show that the method is effective and correct.

关 键 词：小电流接地系统 故障选线 D-S证据理论 信息融合 

分 类 号：TM711[电气工程—电力系统及自动化]