摘要
准确快速的选相元件是高压输电线路使用自动重合闸的前提。分析了现有相模变换矩阵的不足,提出了一种基于新型相模变换矩阵的行波故障选相方法,给出了该方法的选相判据与选相流程。MATLAB仿真结果表明,基于新相模变换矩阵的故障选相元件能有效可靠地选出故障相,且选相结果不受过渡电阻和故障类型影响。
When adopting the technique of single-phase automatic reclosing in EHV / UHV transmission line protection,faultphase should be selected correctly and quickly in advance. Considering the weakness of the currently frequently-used phase-mode transformation matrices,a new approach of traveling wave fault phase selection based on a new phase-mode transformation matrix is proposed in this paper. Besides,the criterion and processes of the approach is analyzed. The simulations carried out by MATLAB show that the fault phase selector based on the new phase-mode transformation matrix can determine the faultphase correctly and the results are not affected by transition resistances and types of faults.
出处
《电气开关》
2016年第1期86-88,共3页
Electric Switchgear
基金
广东省惠州市产学研项目(2012B050013004)
关键词
故障选相
相模变换矩阵
行波保护
小波分析
fault phase selection
phase-mode transformation matrix
traveling wave protection
wavelet decomposition
