利用S变换对零序电流和零序电压进行分解,提取S变换结果中的幅值和相角作为故障特征量。研究了仙农模糊熵的涵义,通过模糊熵和不确定性的关系,定义了信心度来刻画一个事件是否发生的确定性。介绍了2种基于S变换的故障选线方法(比相法和...利用S变换对零序电流和零序电压进行分解,提取S变换结果中的幅值和相角作为故障特征量。研究了仙农模糊熵的涵义,通过模糊熵和不确定性的关系,定义了信心度来刻画一个事件是否发生的确定性。介绍了2种基于S变换的故障选线方法(比相法和能量函数法)的基本原理,基于定义的信心度对2种选线方法得到的选线结果进行了融合,从而选定故障线路。该方法的最终结果不仅包括选定故障线路,而且给出选定该线路发生故障的信心度(fault line identify confidence degree,FLICD)。在PSCAD/EMTDC中建立了4馈线的配电系统仿真模型,通过仿真验证表明,该方法的正确率高。对融合方法和单一方法在噪声环境下的表现进行了对比,结果表明融合方法具有较强的抗噪性。展开更多
Systematic research of the characteristics of late Quaternary activity of the middle part of Kouquan fault has been done through conducting 1∶50000 geologic mapping combining with remote sensing interpretation of spo...Systematic research of the characteristics of late Quaternary activity of the middle part of Kouquan fault has been done through conducting 1∶50000 geologic mapping combining with remote sensing interpretation of spot imaging, field validating and chronology research of the research area. Studies suggest that the middle part of Kouquan fault has had strong activity since the late Quaternary which controls the tectonic evolvement of the nearby mountains and Datong basin. The recent activity of this fault has faulted the sandy gravel layers of T1 terrace and the lower part of dark loessial soils over the terrace on the north of Chanfang village. The maximum vertical displacement is over 3m in the area between Xiaoyukou village and Louzikou village, and to the south of Dayukou village and the north of Emaokou village, the displacement decreases to 0.5m and 0.25m respectively. Based on the recent faulted landforms and combined with dating, we determined the age of recent activity of the fault in the research area to be between 7.71ka B.P. to 3.00 ka B.P. Discussions are made on this in combination with previous research.展开更多
文摘利用S变换对零序电流和零序电压进行分解,提取S变换结果中的幅值和相角作为故障特征量。研究了仙农模糊熵的涵义,通过模糊熵和不确定性的关系,定义了信心度来刻画一个事件是否发生的确定性。介绍了2种基于S变换的故障选线方法(比相法和能量函数法)的基本原理,基于定义的信心度对2种选线方法得到的选线结果进行了融合,从而选定故障线路。该方法的最终结果不仅包括选定故障线路,而且给出选定该线路发生故障的信心度(fault line identify confidence degree,FLICD)。在PSCAD/EMTDC中建立了4馈线的配电系统仿真模型,通过仿真验证表明,该方法的正确率高。对融合方法和单一方法在噪声环境下的表现进行了对比,结果表明融合方法具有较强的抗噪性。
基金jointly funded by the National Natural Science Foundation ( Grant No. 40972143)the Key Research Project of the 11th "Five-year Plan"of China Earthquake Administration( 1520945024)
文摘Systematic research of the characteristics of late Quaternary activity of the middle part of Kouquan fault has been done through conducting 1∶50000 geologic mapping combining with remote sensing interpretation of spot imaging, field validating and chronology research of the research area. Studies suggest that the middle part of Kouquan fault has had strong activity since the late Quaternary which controls the tectonic evolvement of the nearby mountains and Datong basin. The recent activity of this fault has faulted the sandy gravel layers of T1 terrace and the lower part of dark loessial soils over the terrace on the north of Chanfang village. The maximum vertical displacement is over 3m in the area between Xiaoyukou village and Louzikou village, and to the south of Dayukou village and the north of Emaokou village, the displacement decreases to 0.5m and 0.25m respectively. Based on the recent faulted landforms and combined with dating, we determined the age of recent activity of the fault in the research area to be between 7.71ka B.P. to 3.00 ka B.P. Discussions are made on this in combination with previous research.
