基于线性插值法的SMV丢包处理措施研究  

Study on SMV Packet Loss Treatment Measures Based on Linear Interpolation

作　　者：李攀宏[1] 韩正庆[1] 董智慧[1] 高仕斌[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《陕西电力》2014年第4期10-14,共5页Shanxi Electric Power

基　　金：国家自然科学基金重点资助项目(U1134205);中央高校基本科研业务费专项资金(SWJTU12CX028)资助;铁道部科技研究开发计划(2011J023-C)

摘　　要：研究了当间隔层保护、测控等IED使用线性Lagrange法重采样时,出现合并单元传入数据丢包的异常处理措施。讨论了工程中2种常用的数据丢包补偿措施,鉴于线性插值法运算量小、实时性较好的特点,提出一种基于线性插值法的新型补偿方法,分析了各种措施的采样误差,考虑到谐波对补偿措施的影响较大,仿真了稳态和暂态情况下各种措施的采样误差。由于保护测控装置对部分谐波的测量要求较高,仿真了经过3种补偿措施后各次谐波幅值和相位的误差。通过仿真比较,证明新提出的丢包补偿措施更加精确,最终提出了在连续丢包的情况下合理可行的处理方案。A new approach based on linear Lagrange interpolation is proposed in lED resampling.This approach is intended to compensate the packet loss of MU output along with the introduction of two commonly used approaches in real systems.Considering the fundamental components and harmonics,the error is calculated respectively until each sampling point is included once in the packet loss.Compared with the other two approaches,the proposed approach is more effective and accurate.The theoretical analysis and simulation results demonstrate that the presented approach could be extended to the real application of SMV packet loss.

关 键 词：重采样 线性Lagrange插值 SMV丢包 双重插值 

分 类 号：TM762[电气工程—电力系统及自动化]