YU Jian-li,WU Chuan-bin,LENG He,et al.Research on Fault Diagnosis of Grounding Grid Based on Magnetic Field Distribution Characteristics[J].ACTA ELECTRONICA SINICA,2022,50(03):598-607.
YU Jian-li,WU Chuan-bin,LENG He,et al.Research on Fault Diagnosis of Grounding Grid Based on Magnetic Field Distribution Characteristics[J].ACTA ELECTRONICA SINICA,2022,50(03):598-607. DOI: 10.12263/DZXB.20210218.
Research on Fault Diagnosis of Grounding Grid Based on Magnetic Field Distribution Characteristics
In order to avoid on-site excavation during the fault diagnosis of the substation grounding grid
a method of grounding grid fault diagnosis based on magnetic field distribution characteristics is proposed. This method can distinguish the types of grounding grid faults and achieve accurate positioning of fracture and corrosion areas. This method combined with Manhattan distance theory and physical methods such as increasing the amplitude and frequency of excitation current
it can quantify and amplify the grounding grid conductor faults characteristics. The calculations show that the fault type and area can be judged by studying the distribution of the fault grounding grid surface magnetic field and analyzing the distribution characteristics of the fracture points and radiation points; the fault characteristics can be quantified by using the corrosion and fracture characteristic values
and the fault characteristics can be amplified by increasing the amplitude and frequency of the excitation current. These methods can improve the accuracy and efficiency of diagnosis. The research results provide a theoretical reference for the fault diagnosis of the substation grounding grid.
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