Abstract
The grounding system is critical for maintaining the electric power system’s safety and reliability. However, obtaining an appropriate grounding resistance value in limestone soils is challenging. According to prior research that has employed bentonite as a grounding medium, the reduction in resistance caused by bentonite is not very effective. In addition, research has shown that adding sulfuric acid (H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> SO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</inf> ) to bentonite reduces the value of grounding resistance. Grounding resistance is also reduced when salt (NaC1) is combined with bentonite. This study investigated the effects of adding sulfuric acid (H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> SO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</inf> ) and salt (NaC1) to bentonite at different concentrations to help reduce the grounding resistance value of limestone soil using the same addition method.. In this study, the effect of sulfuric acid and salt on bentonite grounding has been discussed. Several combinations of sulfuric acid and salt compositions for grounding bentonite have also been carried out. Each composition is implemented on lime soil. After that, the grounding resistance was measured. This value is entered into the grounding replacement circuit. This is done to observe the potential ground rise due to lightning strikes. Lightning characteristics used are 10 kA with a waveform of 8/20 $\mu$s. In addition, a finite-element method (FEM) simulation was also carried out to describe the potential distribution for each condition. Based on the simulation results, it is known that the potential ground rise in limestone soil is 3.24 MV. While the smallest potential ground rise is the composition of bentonite and 0. SM salt, which is 0. S6S MV.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
