Title :
Grounding Performance Analysis of the Substation Grounding Grids by Finite Element Method in Frequency Domain
Author :
Qi, Lei ; Cui, Xiang ; Zhao, Zhibin ; Li, Huiqi
Author_Institution :
Sch. of Electr. Eng., North China Electr. Power Univ., Baoding
Abstract :
Based on finite element method (FEM) of ID conductor element coupled with 3D soil element, we take into account the frequency dependent characteristic of the discretized elements to analyze the grounding performance of the substation grounding grids. Compared with A-V formulation of 3D FEM, the proposed method can greatly save the CPU time and the frequency can be considered during FEM modeling. In comparison with the method of moment (MoM) and the measured results, the presented method is proved to be correct and effective. Furthermore, we can calculate the H-field generated by the substation grounding grids with both currents in the underground conductors and leakage currents flowing in the soil
Keywords :
conductors (electric); earthing; finite element analysis; frequency-domain analysis; leakage currents; method of moments; power grids; substation protection; 3D FEM; 3D soil element; H-field generation; MoM; conductor element coupling; finite element method; frequency dependent characteristic; frequency domain; grounding performance analysis; leakage currents; method of moment; substation grounding grids; underground conductors; Conductors; Finite element methods; Frequency dependence; Frequency domain analysis; Grounding; Mesh generation; Moment methods; Performance analysis; Soil measurements; Substations;
Conference_Titel :
Electromagnetic Field Computation, 2006 12th Biennial IEEE Conference on
Conference_Location :
Miami, FL
Print_ISBN :
1-4244-0320-0
DOI :
10.1109/CEFC-06.2006.1633052
