为了实现利用电磁辐射信号进行配网电弧故障定位,提出了一种基于到达时差(time difference of arrival,TDOA)方法的Chan-LM协同定位算法.该算法采用Chan算法快速获得的初始点,再经过LM(Levenberg-Marquart)算法迭代修正定位结果.仿真分析了 TDOA定位算法、电磁辐射传感器配置对定位精度的影响,结果表明Chan-LM协同算法比Chan算法的定位误差减小40％,参考主站位于中心位置的Y形布站方式,传感器所在海拔高度相同时的监测区域整体定位准确度较高.利用实测电弧电磁辐射波形验证了 Chan-LM协同算法能够有效改善定位精度,为基于电磁辐射TDOA的电弧定位策略应用提供参考依据.
Arc Fault Location Accuracy Based on Time Difference of Arrival of Electromagnetic Radiation Signals
In order to locate the distribution network arc fault with the electromagnetic radiation signals,a Chan-LM joint location algorithm based on time difference of arrival(TDOA)method was proposed.The influence of TDOA location algorithm and electromag-netic radiation sensor configuration on location accuracy was analyzed by simulation.The results show that the positioning error of Chan-LM joint algorithm is reduced by 40％compared with that of Chan algorithm.It can achieve a high accuracy of location results for the entire detection area when the main station is located in the central position of Y-shaped distribution with these sensors at the same alti-tude.In light of the measured arc electromagnetic radiation waveform,it is verified that the Chan-LM joint algorithm can effectively im-prove the positioning accuracy.A reference is provided for the application of the arc fault location strategy based on electromagnetic ra-diation TDOA.
arc faultlocation accuracyelectromagnetic radiationtime difference of arrivalsensor configuration
万方数据
维普
