State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing 400044, China.
State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China.
Sensors (Basel). 2023 Apr 11;23(8):3879. doi: 10.3390/s23083879.
The location of the grounding grid conductors is critical for performing corrosion diagnosis and maintenance work. An improved magnetic field differential method to locate the unknown grounding grid based on truncation errors and the round-off errors analysis is presented in this paper. It was proven that a different order of the magnetic field derivative can be used to determine the position of the grounding conductor according to the peak value of the derivative. Due to the accumulative error of higher differentiation, the truncation error and rounding error were used to analyze to accumulative error and to determine the optimal step size to measure and calculate the higher differentiation. The possible range and probability distribution of the two kinds of errors at each order are described, and the index of peak position error was derived, which can be used to locate the grounding conductor in the power substation.
接地网导体的位置对于进行腐蚀诊断和维护工作至关重要。本文提出了一种改进的磁场微分法，基于截断误差和舍入误差分析，用于定位未知的接地网。结果证明，可以根据导数的峰值，使用磁场导数的不同阶数来确定接地导体的位置。由于高阶微分的累积误差，使用截断误差和舍入误差来分析累积误差，并确定测量和计算高阶微分的最佳步长。描述了每一阶的两种误差的可能范围和概率分布，并推导出峰值位置误差的指标，可用于定位变电站中的接地导体。
