【作者】 樊高辉； 刘尚合； 刘卫东； 魏明； 胡小锋； 张悦；

【Author】 FAN Gao-hui;LIU Shang-he;LIU Wei-dong;WEI Ming;HU Xiao-feng;ZHANG Yue;Institute of Electrostatic and Electromagnetic Protection,Ordnance Engineering College;

【机构】 军械工程学院静电与电磁防护研究所；

【摘要】 时延估计决定了基于时间差实现放电源定位算法的精度。为提高时延估计精度,提出了一种基于高阶累积量和动态加权统计的时延估计优化算法。首先利用高阶累积量求取放电信号的时延序列,然后对多组时延序列进行动态加权求平均,最后提取出时延。对模拟电晕放电信号时延进行了仿真计算,结果表明该算法能够准确检测出低信噪比放电信号的时延,减小了现有算法中仅依据单组数据判断低信噪比信号时延所引起的误差。最后通过对远距离实测电晕放电信号的时延求解验证了该算法的有效性和实用性。更多还原

【Abstract】 Time-delay estimation determines the precision of the location algorithm for discharges based on time difference.An optimized time-delay estimation algorithm,which was based on the higher-order cumulant theory and the dynamic weighting statistics,was proposed.Firstly,the time-delay sequence of a single set of discharge signals was estimated by higher-order accumulation theory.Then,to the multiple groups of discharges,the dynamic weighting of their time-delay sequences was calculated.Finally,the accuracy time-delay was estimated.A simulation for estimating the time-delay of the corona discharge signals was carried out,and the results show indicated that the new algorithm succeeds in estimating the time-delay of the signals with a low SNR and decreasing the estimation error by conventional algorithms base on a single set of signals.Lastly,the effectiveness and practicality of the algorithm are verified by successfully estimating the time-delay of the measured corona discharge signals at a remote distance.更多还原