摘要
提出了一种基于相关分析的故障序分量选相元件。该元件采用多参量比较的思想,在滤波和滤序环节设计得当时,较基于全周Fourier滤波的故障序分量选相方案速度更快。与电流突变量差选相元件相比,提高了在高阻接地时选相的灵敏度和两相接地短路的可靠性。最后,通过ATP仿真验证了本选相方案的有效性,并展望了相关分析理论在继电保护中的应用前景。
A novel phase selector based on superimpose sequential components and correlation analysis is put forward in this paper. Multi-Base sequential systems are introduced to this phase selector. The phase selecting speed of this criterion may be faster than that of the criterion based on single-base sequential system and one-cycle fourier algorithm. The sensitivity of the single fault with high earth resistance and the phase-selecting reliability of phase-phase to ground fault all are improved in contrast to the phase selector using superimposed differential current between phases. Furthermore, the ATP simulations have verified the effectiveness of this scheme. In the end of this paper, the prospects of the correlation theory application to the protection relaying are expected.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2002年第5期16-21,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(59677010
50177011)
湖北省自然科学基金项目(995016)。
关键词
输电线路
相关分析
故障序分量
选相元件
transmission line
superimposed com-ponent
phase selector
correlation analysis
