CAJ | 학술논문

针对故障选线问题有许多的研究,提出了许多解决方案,但从现场使用情况看,基于不同原理的选线装置选线效果并不理想。因此,如何可靠的实现故障自动选线,有必要对其进行更深入的研究。本文针对传统小波变换在故障选线中的优缺点分析,提出一种基于小波包多频带相关分析的故障选线新方法。通过对各线路暂态零序电流进行一系列变换,得到各线路的故障测距系数,并按大小排序,其中最小值对应的线路即为故障线路。PSCAD仿真验证该方法正确有效。
침대고장선선문제유허다적연구,제출료허다해결방안,단종현장사용정황간,기우불동원리적선선장치선선효과병불이상。인차,여하가고적실현고장자동선선,유필요대기진행경심입적연구。본문침대전통소파변환재고장선선중적우결점분석,제출일충기우소파포다빈대상관분석적고장선선신방법。통과대각선로잠태령서전류진행일계렬변환,득도각선로적고장측거계수,병안대소배서,기중최소치대응적선로즉위고장선로。PSCAD방진험증해방법정학유효。
For a long period, people have done a lot of research for the problem of fanh line detection, and pro- posed a number of methods. However, these devices based on different methods are not ideal from the actual use. Therefore, it＇s essential to do futher research on how to automatically and dependablely select fault line. The faulty line selection based on wavelet transform is an effective method, but it has poor anti -interference a- bility. To address this, a new fault line detection method is proposed by both wavelet packets technology and cor- relation analysis. We can get fault measures through a series transform of transient zero - sequence current, the smallest one is fault line. The simulation experiment based on PSCAD show that the accuracy and effectivity.