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All Journal Jurnal Pendidikan Teknologi dan Kejuruan Jurnal EECCIS Prosiding Semnastek Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Energi dan Lingkungan (Enerlink) Jurnal Teknologi Energi Nusantara Science and Technology Proceedings International Journal of Mechanical Engineering Technologies and Applications (MECHTA) International Journal of Computer and Information System (IJCIS) COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat Journal of Mechanical and Electrical Technology Jurnal Indonesia Sosial Teknologi International Journal of Electrical, Computer, and Biomedical Engineering (IJECBE)
Rinaldy Dalimi
Departemen Teknik Elektro, Fakultas Teknik Universitas Indonesia
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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Dynamic Model on Palm Oil Production Capacity Using Variable CPO Stock for Biofuel Production Setiawan, Arrie Tjahyo; Dalimi, Rinaldy
International Journal of Electrical, Computer, and Biomedical Engineering Vol. 2 No. 1 (2024)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62146/ijecbe.v2i1.33

Abstract

The role of biofuel for running diesel power plants is therefore indispensable for compensating various renewable plants with fluctuating output, maintaining stability to the overall power system. For expanding biofuel production, keeping the rate of investment in CPO mills is critical, as it is often driven by CPO business profit. The seasonal nature of palm-oil plantation harvest directly influences CPO production behaviour. This research investigates system dynamics model simulation for CPO production system, indicated by the feedback loop from market demand, hence influencing the daily (or monthly) CPO production to provide revenue stream to the business. Subsequently, it influences the rate of investment for increasing production capacity, forming the dynamic hypothesis for the system. The model was developed using endogenous variables, while trying to reduce the number of external inputs required to run the simulation. By substituting the price variable with the level of CPO stock at the national level, less uncertainties would affect the system such as price instability situation. Feedback signal from the level of CPO stock was utilized to control the simulated amount of CPO production, as well as the rate of re-investment for expanding the country’s production capacity. Model simulation results was able to reproduce the system behaviour for capacity increase, to meet CPO market demand. The model structure could be further replicated for efficiently developing the dynamic model for basic commodity production, where the rate of commodity production would not influence the overall market demand (decoupling of production rate from global market)
Global Warming Potential from the Life Cycle of Fischer-Tropsch Fuel from Carbon Capture for Passenger Cars in Jakarta Putra, Satria Indrawan; Dalimi, Rinaldy
International Journal of Electrical, Computer, and Biomedical Engineering Vol. 2 No. 1 (2024)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62146/ijecbe.v2i1.36

Abstract

Measures to mitigate the impacts of climate change in the form of carbon capture and storage have not been implemented in Indonesia, especially because there are carbon transportation and storage processes that do not provide added value. The Fischer-Tropsch process is a technology that can produce products that can be processed from CO2 and processed to become value-added commodities in the form of motor vehicle fuel. Using the openLCA application, a life cycle analysis was carried out of the synthesis of FT fuel for use in conventional gasoline vehicles in Jakarta from the capture of CO2 sourced from a coal fired power plant’s exhaust gas, which was compared with the life cycle of electrical energy for battery electric vehicles and conventional fuel for internal combustion engine vehicles. The life cycle impact method used is global warming potential which is expressed in kg CO2-eq. An alternative scenario is created as a comparison for analysis regarding life cycle impacts and parameter sensitivity. It is gathered that FT Fuel synthesis from carbon capture has a higher GWP impact than electrical energy for BEVs and conventional gasoline for ICEVs, due to the high electrical energy requirements from FT Fuel synthesis and the energy mix of the Java-Bali electric power system which is still dominated by fossil-fueled power plants. With alternative scenarios, the GWP impact from FT Fuel synthesis could be equivalent to or lower than electrical energy for BEVs and conventional gasoline for ICEVs.
Implementation of 100% Electric Vehicle in Bali with the Supply of Potential Independent Solar Energy Zensu, Sudarno; Dalimi, Rinaldy
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 1 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.01.10

Abstract

Electrical vehicle is the future of transportation. This thesis is about how to transform the usage of fossil fuel vehicle to electrical vehicle in Bali. Bali is an island with the longest distance from one of its districts to Denpasar city is 95,6 km. This distance is reachable by the common electrical vehicle that available in the market now. The usage of the electrical vehicle requires good development and planning, otherwise it will cause problem for the electrical systems. The consumption of electrical energy will increase.  In 2019, Bali used 5,908 GWh electricity in a year. And if all the 2 wheels and 4-wheels vehicles now are electrical vehicle, it will require extra 2,823 GWh per year. It will impact the planning of power generation in Bali.Another challenge for the electrical systems is the duck curve problem. The habit of the user charges their vehicle will also impact the daily load curve of an electrical systems. If all the two wheels and four wheels vehicles now are electrical vehicle, and all   users conduct the charging at the same time in 4 hours duration, the load will increase about 1,934 GW. The practical and applicable solution is the independent power producer concept by the solar PV. If every electric vehicle user installs the solar PV for their electrical vehicle consumption, this will solve all the problem.
Analysis of Overload Shedding (OLS) - Adaptive Defense Scheme (ADS) on The 150 KV Priok Subsystem to Enhance The Reliability of Jakarta's Electricity Supply In N-1 N-2 Contingency Scenarios Randy, Mochammad Ali; Dalimi, Rinaldy
International Journal of Computer and Information System (IJCIS) Vol 6, No 1 (2025): IJCIS : Vol 6 - Issue 1 - 2025
Publisher : Institut Teknologi Bisnis AAS Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/ijcis.v6i1.223

Abstract

This study analyses the implementation of Overload Shedding (OLS) and Adaptive Defense Scheme (ADS) in the 150 kV Priok subsystem to enhance Jakarta’s electricity supply reliability under N-1/N-2 contingency scenarios. Using DigSILENT PowerFactory, the research evaluates system stability by modelling dynamic load responses, power flows, and contingency simulations. The objective is to optimize OLS-ADS parameters to mitigate cascading failures and ensure equipment safety during critical faults. The methodology involves detailed modelling of the Priok subsystem, including generators, transformers, and protective relays, validated via power flow analysis using the Newton-Raphson method. N-1/N-2 contingencies—such as tripping of IBT2/Bekasi, IBT1/Cawang, and dual IBT failures—are simulated to assess OLS-ADS performance. Dynamic load shedding logic adapts to real-time system conditions, prioritizing critical loads and generators. Results show that OLS-ADS successfully prevents equipment overloading in N-1 scenarios (e.g., IBT2/Bekasi tripping) by shedding 6–20% of the load, maintaining voltages (0.9–1.0 pu) and frequencies (49.9–50 Hz) within safe limits. Rotor angles in Priok’s PLTGU units remain below IEEE’s ±90° threshold. However, N-2 contingencies (e.g., simultaneous loss of IBT2/4/Bekasi) require shedding 50% of the load to avert cascading failures, highlighting systemic vulnerabilities. The study concludes that OLS-ADS significantly improves N-1 resilience but underscores the need for enhanced redundancy (e.g., integrating Muara Tawar’s 500/150 kV IBTs) to mitigate N-2 risks. Findings provide actionable guidelines for optimizing ADS logic and expanding grid infrastructure to ensure reliable power supply in DKI Jakarta
Specification Design and Techno-Economic Analysis of Green Distribution Transformers with Amorphous Iron Cores and Natural Ester Oil for Sustainable Power Systems Kusumadinata, Angga; Dalimi, Rinaldy
International Journal of Electrical, Computer, and Biomedical Engineering Vol. 3 No. 1 (2025)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62146/ijecbe.v3i1.88

Abstract

The initiatives for renewables and energy efficiency necessitates upgrading the design of distribution transformers, which still rely on petroleum-based mineral oil and contribute significantly to network losses. This research focuses on the design, development, and testing of a novel green distribution transformer. Green distribution transformers are defined as transformers that utilize environmentally friendly natural ester insulation oil and high-energy-efficiency amorphous iron cores. The design of the transformer is determined based on key characteristics and appropriate technical specifications and construction requirements, including the setting of new, very low no-load loss and load loss limit values. The prototype was developed and rigorously tested to assess its compliance with technical standards and evaluate its performance. The results demonstrate that the green distribution transformer meets the required specifications and exhibits significantly lower losses. A comprehensive economic analysis using total cost of ownership, considering the initial cost and operating costs, reveals that the green distribution transformer offers a lower total cost of ownership over its lifetime compared to conventional transformers. These findings highlight the potential of green distribution transformers to contribute to a more sustainable and efficient power grid.
Optimalisasi Health Index pada Asesmen Peralatan di UPT Palembang untuk Mempercepat Penggantian Peralatan Gardu Induk Hendriansyah, Novi; Dalimi, Rinaldy
Metrotech (Journal of Mechanical and Electrical Technology) Vol 4 No 2: Mei 2025
Publisher : Fakultas Sains dan Teknologi, UNIRA Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/metrotech.v4i2.7077

Abstract

Saat ini metode perhitungan Health Index pada asesmen peralatan Gardu induk di PT PLN (Persero) Unit Pelaksana Transmisi Palembang (UPT Palembang) hanya menggunakan data kondisi teknis yang diperoleh dari evaluasi hasil pemeliharaan dalam bentuk skor asesmen, sehingga semakin banyaknya aset yang beroperasi serta umur peralatan yang terus bertambah dengan tingkat risiko yang berbeda, akan menyebabkan Health Index peralatan UPT Palembang menjadi tidak optimal, akibatnya proses justifikasi usulan penggantian peralatan menjadi terlambat dan tidak tepat sasaran. Untuk menyelesaikan permasalahan tersebut, Perhitungan Health Index dioptimalkan dengan menambahkan kriteria umur operasi dan kriteria tingkat risiko peralatan menggunakan metode Multi Criteria Decision Making (MCDM) sehingga proses justifikasi usulan penggantian peralatan menjadi lebih cepat dan tepat.
Analisa teknologi dan ekonomi dedieselisasi PLTD Merawang menjadi Pembangkit berbasis energi terbarukan di Pulau Bangka, Bangka Belitung Kusuma, Arya Bima Aji; Dalimi, Rinaldy
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 5 No. 1 (2025): COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v5i1.3119

Abstract

PLTD Merawang di Pulau Bangka masih bergantung pada bahan bakar solar yang mahal, sehingga biaya operasional menjadi tinggi. Pemerintah Indonesia menginisiasi program dedieselisasi untuk mengganti atau meng-hybrid PLTD dengan pembangkit energi terbarukan, seperti tenaga surya dan angin, guna menurunkan biaya energi (COE) dan emisi. Penelitian ini bertujuan untuk mengidentifikasi konfigurasi pembangkit hybrid yang paling optimal dan ekonomis melalui simulasi skenario on-grid dan off-grid dengan berbagai proporsi energi terbarukan. Metode yang digunakan adalah simulasi kuantitatif berdasarkan data kebutuhan listrik, potensi energi terbarukan, dan biaya peralatan. Hasil penelitian menunjukkan bahwa konfigurasi PLTS hybrid 75% dengan PLTD 25% pada sistem on-grid menghasilkan COE terendah sebesar 1659 rupiah/kWh, jauh di bawah COE PLTD saat ini dan standar provinsi Bangka Belitung. Skenario ini juga layak secara ekonomi dengan kriteria NPV yang memenuhi kriteria investasi. Sebaliknya, konfigurasi PLTB menghasilkan COE lebih tinggi karena variabilitas angin dan biaya teknologi yang mahal. Implikasi penelitian ini mendukung program dedieselisasi dengan rekomendasi konfigurasi hybrid berbasis PLTS sebagai solusi efisien dan ramah lingkungan untuk daerah kepulauan.
Economic Analysis of Hybrid Power Plant (Solar-Diesel) on Kawaluso Island, North Sulawesi Ilham Amba , Muhammad; Dalimi, Rinaldy
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 17 No. 1 (2023)
Publisher : Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jeeccis.v17i1.1633

Abstract

Kawaluso Island is one of the outermost islands in Indonesia with a distance of 68 KM from the city of Tahuna or 5-10 hours by boat from the capital of the Sangihe Islands Regency, Tahuna. Currently, electricity on Kawaluso Island is supplied by a diesel power plant (PLTD) with a capacity of 200 kW. This condition causes Kawaluso Island to be electrified 12 hours per day. So that additional sources of power plant are needed so that the electricity on Kawaluso Island is on 24 hours a day. Therefore, a solar power plant (PLTS) is one of alternative as additional power for Kawaluso Island and reduces the cost of production. A diesel power plant where the price of industrial fuel reaches up to Rp. 24.500 and it make Cost of Energy Rp. 10.360/kWh. The method used in this study uses the Levelized Cost of Energy (LcoE) method. The results of the analysis show that the hybrid between diesel power plant and solar power plant 64 kWp and 72 kWp has a Life Cycle Cost (LCC) value of Rp24.389.601.114,40 and Rp. 20.589.498.278,40 With a Cost of Energy (COE) of Rp. 7.432 and Rp. 5.601/kWh. Net Present Value (NPV) obtained is positive. And the payback period is 3 and 9 years of investment and is categorized as feasible to continue.
Implementation of 100% Electric Vehicle in Bali with the Supply of Potential Independent Solar Energy Zensu, Sudarno; Dalimi, Rinaldy
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 1 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.01.10

Abstract

Electrical vehicle is the future of transportation. This thesis is about how to transform the usage of fossil fuel vehicle to electrical vehicle in Bali. Bali is an island with the longest distance from one of its districts to Denpasar city is 95,6 km. This distance is reachable by the common electrical vehicle that available in the market now. The usage of the electrical vehicle requires good development and planning, otherwise it will cause problem for the electrical systems. The consumption of electrical energy will increase.  In 2019, Bali used 5,908 GWh electricity in a year. And if all the 2 wheels and 4-wheels vehicles now are electrical vehicle, it will require extra 2,823 GWh per year. It will impact the planning of power generation in Bali.Another challenge for the electrical systems is the duck curve problem. The habit of the user charges their vehicle will also impact the daily load curve of an electrical systems. If all the two wheels and four wheels vehicles now are electrical vehicle, and all   users conduct the charging at the same time in 4 hours duration, the load will increase about 1,934 GW. The practical and applicable solution is the independent power producer concept by the solar PV. If every electric vehicle user installs the solar PV for their electrical vehicle consumption, this will solve all the problem.
Analisa teknologi dan ekonomi dedieselisasi PLTD Merawang menjadi Pembangkit berbasis energi terbarukan di Pulau Bangka, Bangka Belitung Kusuma, Arya Bima Aji; Dalimi, Rinaldy
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 5 No. 1 (2025): COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v5i1.3119

Abstract

PLTD Merawang di Pulau Bangka masih bergantung pada bahan bakar solar yang mahal, sehingga biaya operasional menjadi tinggi. Pemerintah Indonesia menginisiasi program dedieselisasi untuk mengganti atau meng-hybrid PLTD dengan pembangkit energi terbarukan, seperti tenaga surya dan angin, guna menurunkan biaya energi (COE) dan emisi. Penelitian ini bertujuan untuk mengidentifikasi konfigurasi pembangkit hybrid yang paling optimal dan ekonomis melalui simulasi skenario on-grid dan off-grid dengan berbagai proporsi energi terbarukan. Metode yang digunakan adalah simulasi kuantitatif berdasarkan data kebutuhan listrik, potensi energi terbarukan, dan biaya peralatan. Hasil penelitian menunjukkan bahwa konfigurasi PLTS hybrid 75% dengan PLTD 25% pada sistem on-grid menghasilkan COE terendah sebesar 1659 rupiah/kWh, jauh di bawah COE PLTD saat ini dan standar provinsi Bangka Belitung. Skenario ini juga layak secara ekonomi dengan kriteria NPV yang memenuhi kriteria investasi. Sebaliknya, konfigurasi PLTB menghasilkan COE lebih tinggi karena variabilitas angin dan biaya teknologi yang mahal. Implikasi penelitian ini mendukung program dedieselisasi dengan rekomendasi konfigurasi hybrid berbasis PLTS sebagai solusi efisien dan ramah lingkungan untuk daerah kepulauan.
Co-Authors Agus R Hoetman Amrico, Hendrik Andhika Prastawa Andhika Prastawa Dhona, Roma Ganesha T Chandrasa Hendriansyah, Novi Ilham Amba , Muhammad Iqbal Arrasyid, Muhammad Kumalaningrum, Della Kusuma, Arya Bima Aji Kusumadinata, Angga M. Eka Putra Abdillah Majid, M. Atthar Moch Zulfikar Eka Prayoga Nasir, Randy Maulana Prasetya, Muhammad Rezansyah Tangguh Putra, Putu Erlangga Putra, Satria Indrawan Randy, Mochammad Ali Setiawan, Arrie Tjahyo Zensu, Sudarno Zuhal Zuhal