Multi-layer soil modelling

Ishak, Nur Shahwani (2021) Multi-layer soil modelling. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

A good electrical system must have an excellent protection of grounding system. This action can avoid a dangerous event to human and also prevent damage on the electrical equipment. One of the factors that can affected the grounding was a soil resistivity where it must low in order to presented a lower resistance reading on the soil. So, a multilayer soil modelling proposed a measuring method for soil resistivity using computer software, COMSOL Multiphysics. The operation started with simulated the uniform soil and then validate it boundary of soil and model itself. Then, a two-layer soil model was simulated and then evaluated using COMSOL to yield a potential different value which then used to calculate both resistance and apparent resistivity value. A comparison between simulated COMSOL soil model with simulated mention in the IEEE80-2000 was carried out to observe any differences on the apparent resistivity reading. Besides that, the parameter analysis also was done for several set of reading for three type of parameters which were distance between rod, depth of soil and resistivity each layer of soil. In this analysis, any changes on the reading of apparent resistivity were observe with increasing of distance between rod and depth of soil and same goes to resistivity each layer soil. The analysis on resistivity each layer of soil was carried out at two conditions, when resistivity upper layer more than lower layer (

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