FEM Analysis and Sensor-Based Measurement Scheme of Current Distribution for Grounding Electrode
| Autor: | Wenzhen Li, Hanwu Luo, Li Zhu, Hui Jiang, Fan Yang, Jianjun Han |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
current measurement
Materials science Soil test 020209 energy Mechanical engineering 02 engineering and technology HVDC transmission lcsh:Technology lcsh:Chemistry 0202 electrical engineering electronic engineering information engineering current dispersion General Materials Science lcsh:QH301-705.5 Instrumentation Fluid Flow and Transfer Processes lcsh:T Ground Process Chemistry and Technology 020208 electrical & electronic engineering Soil resistivity Direct current General Engineering Transmission system lcsh:QC1-999 Finite element method Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Hall effect sensor Current (fluid) lcsh:Engineering (General). Civil engineering (General) lcsh:Physics grounding electrode |
| Zdroj: | Applied Sciences, Vol 10, Iss 8151, p 8151 (2020) Applied Sciences Volume 10 Issue 22 |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app10228151 |
| Popis: | The current distribution of the grounding electrode in a high-voltage direct current (HVDC) transmission system affects the state of power equipment in its vicinity, which depends on the soil resistivity and shape of the grounding electrode. In this paper, current distribution in the vicinity of an ± 800 kV grounding electrode is investigated by simulation and experiments. Firstly, the model to calculate the current distribution with two typical frozen soils is set up, and simulation models and experimental platforms are established meanwhile, the finite element method (FEM) is used to calculate the current and potential dispersion of linear, cross-shaped, and ring-shaped grounding electrodes in the simulation models. After obtaining the lab current data from the simulation, an innovative method based on a &ldquo drainage wire&rdquo with a Hall sensor is proposed to measure the current in an experimental setup. The results show that current and potential distribution characteristics are related to the shape of the grounding electrode and soil resistivity. Meanwhile, the current measurement scheme can measure the current in soil with a lower error. This article concludes that these two typical models can reduce the complexity of frozen soil analysis, and the measurement scheme can accurately monitor the current to reduce the damage to the surrounding power equipment. |
| Databáze: | OpenAIRE |
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