摘要
传统的、基于待测的故障特征量的小电流单相接地故障选线方法存在局限性,针对此问题,提出一种基于灰色理论、融合多种判据、有效利用已有的故障特征量的选线方法,以各出线、母线单相接地故障的电流、电压等特征量组成选线系统的典型接地故障样本,通过待测样本与比较样本之间的关联度判断所属状态,然后利用灰关联序来判断故障线路。利用电力系统计算机辅助设计(power system computer aided design,PSCAD)软件与Matlab软件进行仿真实验,实验结果验证了该方法可靠、有效。
In view of the limitations of traditional small current single phase-to-ground fault detecting method based on fault characteristic quantities to be measured,a faulty line detecting method is proposed based on grey theory,integration of multiple criteria and effective use of existing fault characteristic quantities,which integrates characteristic quantities such as current and voltage of single phase-to-ground faults in outlets and buses as typical earth fault sample of the detecting system,judges the fault condition through the correlation between the test sample and the typical sample,and uses the grey correlation order to determine the faulty line.The reliability and efficiency of the proposed method are verified by simulation test using software of power system computer aided design(PSCAD) and Matlab.
出处
《广东电力》
2010年第8期6-9,共4页
Guangdong Electric Power
关键词
小电流接地系统
灰色理论
故障选线
电磁暂态软件
故障特征量
small current grounding system
grey theory
fault detection
electromagnetic transient software
fault characteristic quantity