基于雷电记录与行波数据的雷击故障测距结果优化方法

An Optimization Method for Lightning Fault Location Results Based on Lightning Records and Traveling Wave Data

针对雷击故障参考点定位不准确,导致测距结果可能与雷击故障发生的实际距离相差较大的问题,结合雷电记录与行波数据,从雷击故障参考点定位角度着手,进行雷击故障测距结果优化研究。首先获取相关雷电记录和行波数据,然后计算待分析故障特征点,并利用雷击故障历史数据、非雷击故障历史数据、雷电定位系统历史数据,构建(Δx,Δt,ΔP)三维坐标系,划分雷击故障识别域和非雷击故障识别域,判断待分析故障特征点是否落入雷击故障识别域当中,确定雷击故障参考点,最后利用行波测距方法得出雷击故障精确位置。结果表明,与基于雷电记录或基于行波数据的2种单一测距方法相比,该方法测距结果更接近实际值,由此可知,雷击故障测距结果得到优化,提高了测距精度。

Aiming at the problem that the location of lightning fault reference point is not accurate so that the distance measurement result may differ greatly from the actual distance of the lightning occurrence, combining lightning records and traveling wave data, starting from the positioning point of lightning fault reference point,the optimization research on the lightning fault location results is carried out. The research first obtains relevant lightning records and traveling wave data,and then calculates the fault feature points to be analyzed,and constructs a(Δx,Δt,ΔP)three-dimensional coordinate system using lightning historical data,non-lightning fault historical data and lightning positioning system historical data;and divides the lightning fault identification domain and the nonlightning fault identification domain;and determines whether the feature point to be analyzed falls into the lightning fault identification domain;and determines the lightning fault reference point;and finally uses the traveling wave ranging method to obtain the precise location of the lightning fault. The results show that,compared with the two single ranging methods based on lightning records or traveling wave data,the ranging results of this method are closer to the actual value,which shows that the results of lightning fault location are optimized and the accuracy of ranging is improved.