Practical techniques for smooth geodesic patterning of membrane structures were investigated.For the geodesic search,adjustment of the subplane of the extracted elements series was proposed,and various spline approxim...Practical techniques for smooth geodesic patterning of membrane structures were investigated.For the geodesic search,adjustment of the subplane of the extracted elements series was proposed,and various spline approximation methods were used to flatten the strip for the generation of a smooth pattern.This search approach is very simple,and the geodesic line could be easily attained by the proposed method without the need for a difficult computation method.Smooth cutting patterning can also be generated by spline approximation without the noise in discrete nodal information.Additionally,the geodesic cutting pattern saved about 21%of the required area for the catenary model due to the reduction of the curvature of the planar pattern seam line.展开更多
针对风电场集电线短路故障未及时定位、排除而造成弃风、窝电的问题,文章提出了一种基于插值辅助电磁时间反演(Electromagnetic Time Reversal,EMTR)的风电场集电线故障定位方法。首先,阐述EMTR理论应用于集电线故障定位的优越性,揭示现...针对风电场集电线短路故障未及时定位、排除而造成弃风、窝电的问题,文章提出了一种基于插值辅助电磁时间反演(Electromagnetic Time Reversal,EMTR)的风电场集电线故障定位方法。首先,阐述EMTR理论应用于集电线故障定位的优越性,揭示现有EMTR测距方法中假设故障点密度受采样率限制进而产生测距误差的现象;然后,在分析EMTR测距方法与插值思想契合性的基础上,引入插值思想,等效提升信号采样率,形成插值辅助EMTR故障测距方法;最后,结合集电线拓扑,构建故障区域判别矩阵,分析矩阵元素特征,进行故障区域识别,并实现故障点精确定位。仿真结果表明,定位方案仅需要少量测点即可实现准确定位,且有效克服集电线行波采样率相对不足的问题。展开更多
基金Project(12 High-tech Urban C22)supported by High-tech Urban Development Program,Ministry of Land,Transport and Moritime Affairs of Korea
文摘Practical techniques for smooth geodesic patterning of membrane structures were investigated.For the geodesic search,adjustment of the subplane of the extracted elements series was proposed,and various spline approximation methods were used to flatten the strip for the generation of a smooth pattern.This search approach is very simple,and the geodesic line could be easily attained by the proposed method without the need for a difficult computation method.Smooth cutting patterning can also be generated by spline approximation without the noise in discrete nodal information.Additionally,the geodesic cutting pattern saved about 21%of the required area for the catenary model due to the reduction of the curvature of the planar pattern seam line.
文摘针对风电场集电线短路故障未及时定位、排除而造成弃风、窝电的问题,文章提出了一种基于插值辅助电磁时间反演(Electromagnetic Time Reversal,EMTR)的风电场集电线故障定位方法。首先,阐述EMTR理论应用于集电线故障定位的优越性,揭示现有EMTR测距方法中假设故障点密度受采样率限制进而产生测距误差的现象;然后,在分析EMTR测距方法与插值思想契合性的基础上,引入插值思想,等效提升信号采样率,形成插值辅助EMTR故障测距方法;最后,结合集电线拓扑,构建故障区域判别矩阵,分析矩阵元素特征,进行故障区域识别,并实现故障点精确定位。仿真结果表明,定位方案仅需要少量测点即可实现准确定位,且有效克服集电线行波采样率相对不足的问题。
