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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) Foristek Jambura Journal of Electrical and Electronics Engineering Jurnal Teknik Elektro dan Komputasi (ELKOM) Madaniya Jurnal Sibermas (Sinergi Pemberdayaan Masyarakat) Jurnal Nasional Teknik Elektro dan Teknologi Informasi Jurnal Abdimas Terapan Jurnal Electrichsan Empiris Jurnal Pengabdian Pada Masyarakat (EJPPM) Jurnal Multidisiplin Indonesia Jurnal Pengabdian Pada Masyarakat Eldimas Journal Of Renewable Energy Engineering Emitor: Jurnal Teknik Elektro SNTE
Ade Irawaty Tolago
Universitas Negeri Gorontalo
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Utilization of Coconut Shell Charcoal for Grounding Resistance Reduction Using Plate Electrodes Moha, Yusran; Yusuf, Taufiq Ismail; Tolago, Ade Irawaty
Jambura Journal of Electrical and Electronics Engineering Vol 8, No 1 (2026): Januari - Juni 2026
Publisher : Electrical Engineering Department Faculty of Engineering State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjeee.v8i1.29165

Abstract

The grounding system is an essential component of electrical protection systems, requiring low resistance values to ensure the safety of equipment and personnel. The grounding resistance is influenced by several factors, including soil type, soil moisture, temperature, as well as the structure and characteristics of the soil at the installation site. One method that can be applied to reduce grounding resistance is the use of additional materials such as coconut shell charcoal. This study aims to analyze the effect of adding coconut shell charcoal on grounding resistance using square plate electrodes. The testing was conducted over a period of 15 days with variations in electrode size, namely 40 cm and 60 cm, installed at a depth of 80 cm. The results indicate that the addition of coconut shell charcoal significantly reduces grounding resistance. The resistance value decreased from 43.4 Ω to 10 Ω when using a 40 cm electrode and from 21.5 Ω to 7.6 Ω when using a 60 cm electrode on the 15th day. The percentage reduction in resistance reached 77%. Furthermore, the use of larger electrodes resulted in lower resistance values. These results demonstrate that coconut shell charcoal is effective in improving the performance of grounding systems.
Comparative Analysis and Optimization of GIS-Based Rooftop Solar Power Plants Hidayat, Ikhsan; Salim, Sardi; Tolago, Ade Irawaty; Mohamad, Yasin; Bonok, Zainudin
Jambura Journal of Electrical and Electronics Engineering Vol 8, No 1 (2026): Januari - Juni 2026
Publisher : Electrical Engineering Department Faculty of Engineering State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjeee.v8i1.34333

Abstract

The increasing demand for electricity and the global commitment to carbon reduction have encouraged higher education institutions to integrate renewable energy into campus infrastructures. However, most previous rooftop PV studies at Universitas Negeri Gorontalo (UNG) have been limited to single-building assessments or have not fully integrated spatial analysis with technical simulation. This study addresses this research gap by conducting a comparative analysis and system optimization of a rooftop photovoltaic (PV) installation at the Faculty of Engineering building using a combined Geographic Information System (GIS) approach and detailed technical simulation through HelioScope. The optimized design yields a total capacity of 368.79 kWp comprising 647 Canadian Solar 570W modules. Simulation results indicate an annual energy output of 486.5 MWh with a Performance Ratio (PR) of 95.8%, where PR represents the ratio of actual system performance to ideal irradiance conditions, and a solar access value of 99.2%. The economic assessment shows a payback period of 11.04 years under an export tariff of IDR 1,440/kWh. Furthermore, a comparative evaluation with two previous studies demonstrates significant improvements in both technical and economic aspects due to the integrated GIS and high-resolution simulation approach. The findings provide a valuable reference for advancing renewable energy implementation in educational institutions, particularly in designing efficient and sustainable rooftop PV systems.
Co-Authors A. Bolilio, Moh. Rafli abdusammad, Syahrir Amali, Kamil Amiruddin Y Dako Amirudin Y. Dako Arafat, Muhammad Yasser Arifin Matoka Ariwinoto, Diki Bagus Wijaya, Bagus Bambang Panji Asmara Bonok, Zainuddin Budianto Budianto Cristoper Elchrisa Dako, Amiruddin Dako, Rahmat Dako, Rahmat Deddy Dako, Rahmat Deddy R. Damogalad, Muhamad Rifai Djafar, Ariyani Dongka, Rahmad Hidayat Dongka, Rahmat Hidayat Duhi, Sahrul Elysiantobuo, Nova Ervan Hasan Harun Gunawan, Anggun H, Haeriani Haeriani Haeriani Hidayat, iksan Ifan Wiranto Ikhsan Hidayat Ikhsan Hidayat Ilham Amu Iskandar Zulkarnain Nasibu Jumiati Ilham Kamali Amali, Lanto M Lanto Kamil Amali Lanto Mohamad Kamil Amali Maharani R.P. Syafii Moha, Yusran Muhammad Alim, Muhammad Nadifa, Ulfatun Nirmalasari Nirmalasari R. Dako, Rahmat Dedi Rahmad Hidayat Dongka Rahmat D.R. Dako Rahmat Deddy Rianto Dako Rianto Dako, Rahmad Dedi Rifaldi, Mohammad Salmawaty Tansa Sardi Salim Sri Wahyuni Dali Sri Wahyuni Dali Sri Wahyuni Dali Syahrir Abdussamad Taufik Ismail Yusuf Taufiq Ismail Yusuf Taufiq Ismail Yusuf Ulfatun Nadifa Wahab Musa Wahab Musa, Wahab Musa Wrastawa Ridwan Yahja Igirisa Yasin Mohamad Yasin Mohammad Yasser , Muhammad Zainudin Bonok