基于小波的谐振接地系统故障选线的优化研究  

Optimization of Fault Line Selection Based on Wavelet for Single-phase to Ground Fault in Resonant Grounding System

作　　者：姚建红[1] 吴丹[1] 陆长东[2] 

机构地区：[1]东北石油大学电气信息工程学院,大庆163318 [2]大庆油田有限责任公司第二采油厂,大庆163000

出　　处：《科学技术与工程》2014年第28期220-225,共6页Science Technology and Engineering

摘　　要：由于谐振接地系统在电网中被广泛的应用,所以谐振接地系统单相接地故障选线一直以来是研究的热点。针对现有的谐振接地系统故障选线方法存在的不足,基于短时投入并联电阻,提高暂态特征分量的选线方法,提出了一种优化方案;即通过可控硅控制消弧线圈并联电阻,增强故障线路的特征信号,把提取的故障时的零序电流暂态信号进行小波变换,检测分解和重构后的信号的奇异性,从而确定故障线路。仿真结果表明了优化方案的准确性。The resonant grounding system is widely used in the power grid system, so the resonant grounding system of single-phase grounding fault line selection has been researched the hot problem. In view of the existing resonant grounding of the defects in the system of fault line selection method, based on short-term put in the parallel resistance, improve transient characteristics of component line, an optimization scheme is put forward. The resistance which in parallel with the Petersen coil has been controlled by the SCR, and it can enhance the fault characteristic signal. To determine the fault line, the extraction of zero-sequence current transient signal to wavelet transforms, the singularity of signals after decomposed and reconstructed is detected. The simulation results show that the scheme is correct.

关 键 词：谐振接地系统 故障选线 并联电阻 可控硅 小波分析 

分 类 号：TM743[电气工程—电力系统及自动化]