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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Edukasi Elektro JTEV (Jurnal Teknik Elektro dan Vokasional ELKHA : Jurnal Teknik Elektro Jurnal Momentum SITEKIN: Jurnal Sains, Teknologi dan Industri JURNAL NASIONAL TEKNIK ELEKTRO PROtek : Jurnal Ilmiah Teknik Elektro Journal of Energy, Mechanical, Material and Manufacturing Engineering Seminar Nasional Teknologi Informasi Komunikasi dan Industri Multitek Indonesia : Jurnal Ilmiah JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics SNTE Jurnal Teknik Elektro
Zulfatri Aini
Universitas Islam Negeri Sultan Syarif Kasim Riau
Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

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Electrical Energy Audit in Pratama Tapan Hospital Putra, Nanda Okta; Aini, Zulfatri; Putri, Dila Marta
Jurnal Edukasi Elektro Vol. 8 No. 1 (2024): Jurnal Edukasi Elektro, Volume 8, No. 1, Mei 2024
Publisher : DPTE FT UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jee.v8i1.65277

Abstract

Hospitals, as large energy consumers, must adopt efficient energy-saving measures due to cost increases, regulations, and climate change concerns. In this study, an electrical energy audit was conducted at Pratama Tapan Hospital to identify energy-saving opportunities and recommend equipment replacements or technology upgrades. The primary objective was to determine the Energy Consumption Intensity (ECI) and analyze the potential for energy savings. The audit re-vealed an ECI value of 10.33 kWh/m²/year, highly efficient by ASEAN-USAID standards. However, 100% of rooms didn't meet the SNI 03-6197-2000 light intensity standard, causing discomfort. The study recommends installing specific light fixtures and adjusting lamp power to comply with the standard. These findings offer valuable insights for healthcare institutions striv-ing to achieve sustainability goals.
Estimated Cost of Power Losses Due to Imbalance, No-Load and On-Load on Transformers in 2023-2033 Liliana, Liliana; Aini, Zulfatri; Bandri, Sepannur
Jurnal Edukasi Elektro Vol. 8 No. 1 (2024): Jurnal Edukasi Elektro, Volume 8, No. 1, Mei 2024
Publisher : DPTE FT UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jee.v8i1.65224

Abstract

The greater the power losses, the higher the loss costs for the transformer. These losses can occur due to load, no-load, and load imbalance factors. This study aims to obtain the cost of losses incurred due to these three factors for ten years (2023-2033). The estimated cost of losses due to unbalance is obtained from the calculation of power losses in the neutral of the transformer, the cost of no-load losses is obtained from the losses of the iron core in the transformer, In contrast the cost of load losses is influenced by the development of the load and the interest rate for each year. As a result, the greatest power losses occur under unbalanced conditions with an average load for ten years of 88.68%, followed by no-load conditions of 11.10% and 0.21% load. The total power losses for ten years amounted to Rp. 3,029,196,416.64.
ANALISIS PENGARUH KETEBALAN MAGNET DAN JUMLAH LILITAN TERHADAP KARAKTERISTIK GENERATOR MAGNET PERMANEN 18 SLOT 16 POLE Diar, Abdurahman; Aini, Zulfatri
MULTITEK INDONESIA Vol 17, No 1 (2023): Juli
Publisher : Universitas Muhammadiyah Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24269/mtkind.v17i1.7411

Abstract

Abstrak Energi angin di Indonesia memiliki potensi yang besar sehingga perlu dimanfaatkan untuk menghasilkan energi listrik dalam rangka transisi energi. Namun, kecepatannya yang tergolong menengah-rendah merupakan tantangan untuk memaksimalkan potensinya. Generator yang cocok digunakan adalah Permanent Magnet Synchronous Generator (PMSG).  Namun, PMSG yang digunakan saat ini memiliki efisiensi dan karakteristik yang masih rendah. Penelitian ini menggunakan parameter-parameter terbaik dari penelitian-penelitian sebelumnya dan menambahkan pembaruan pada ketebalan magnet dan jumlah lilitan agar dapat menghasilkan PMSG berkarakteristik tinggi. Peneliti melakukan perancangan dan pengujian melalui simulasi dengan bantuan software Magnet Infolytica dengan metode Finite Element Method (FEM). Nilai hasil simulasi diolah menggunakan Microseft Excel untuk menghasilkan nilai daya input, daya output dan efisiensi. Variasi ketebalan magnet yang digunakan adalah 3 mm, 6 mm, dan 9 mm. Variasi jumlah lilitan yang digunakan adalah 20, 30, dan 40 lilitan. Hasil simulasi penelitian menunjukkan bahwa karakteristik tertinggi yang dihasilkan adalah PMSG ketebalan 9 mm dan lilitan 40 dengan arus 26,59 A, tegangan 265,88 V, torsi -73,85 Nm, daya input 7.744,71 W dan daya output 7.266,01 W. Sedangkan efisiensi terbesar adalah PMSG ketebalan 9 mm dan lilitan 30 dengan arus 24,36 A, tegangan 243,58 V, torsi -61,52 Nm, daya input 6.441,46, daya output 6.101,13 dan efisiensi 94,70%. Abstract Wind energy in Indonesia has great potential so it needs to be utilized to produce electrical energy in the context of energy transition. However, its medium-low speed is a challenge to maximize its potential. A suitable generator for use is a Permanent Magnet Synchronous Generator (PMSG).  However, the PMSG used today has low efficiency and characteristics. This study uses the best parameters from previous studies and adds updates to the magnetic thickness and number of windings to produce high-characteristic PMSG. Researchers design and test through simulation with the help of Magnet Infolytica software with Finite Element Method (FEM) method. The simulated values are processed using Microsoft Excel to produce input power, output power, and efficiency values. The variations in magnetic thickness used are 3 mm, 6 mm, and 9 mm. The variations in the number of windings used are 20, 30, and 40 windings. The results of the research simulation showed that the highest characteristics produced were PMSG thickness of 9 mm and winding 40 with a current of 26,59 A, voltage of 265,88 V, torque of -73,85 Nm, input power of 7.744,71 W and output power of 7.266,01 W. While the greatest efficiency is PMSG thickness of 9 mm and winding 30 with a current of 24,36 A, voltage of 243,58 V, torque of -61,52 Nm,  Input power 6.441,46, output power 6.101,13 and efficiency 94,70%.  
Analisis Pengaruh Slot Terhadap Efisiensi Generator Permanent Magnet Synchronous Generators (PMSG) 12 Slot 16 Pole dan 24 Slot 16 Pole Menggunakan FEM (Finite Element Method) Andika, Rizki; Aini, Zulfatri
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 8, No 3 (2023): September 2023
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v8i3.1705

Abstract

Permanent magnet synchronous generator (PMSG) is a self-excitation generator using a permanent magnet. PMSG has different slot variations so that it has different efficiencies. This study aims to see the effect of slots on the efficiency of PMSG 12 Slot 16 Pole and PMSG 24 Slot 16 Pole. The research method used is to simulate PMSG 12 Slot 16 Pole and PMSG 24 Slot 16 Pole in Finite Element Method (FEM) based software. In the simulation at a rotating speed of 1000 Rpm with a variable in the form of resistance R = 50 Ω PMSG 12 Slot 16 Pole obtained an output value of 1245.29 Watt with an efficiency of 76% while PMSG 24 Slot 16 Pole obtained an output value of 3919 Watt with an efficiency of 86%.Keywords - Permanent Magnet Synchronous generator (PMSG), Slot, Efficiency.
Analisis Kualitas Tahanan Isolasi Pada Transformator Dengan Preventive Maintenance di Gardu Induk Garuda Sakti Efryansah, Randra Agustio; Aini, Zulfatri
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 8, No 3 (2023): September 2023
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v8i3.1864

Abstract

Transformers work around the clock to maintain the stability of power distribution to the community. If inspections and maintenance are not done, it will cause problems such as disturbances and damage, one of which is a disturbance in transformer insulation resistance caused by high operation factors, temperature, leakage current, and equipment age that can cause a decrease or damage in insulation quality. Therefore, it is important to do regular maintenance, one of which is through preventive maintenance as an effort to know the quality of insulation resistance on transformers. In this study, preventive maintenance was carried out which includes four methods, namely polarization index, tangent delta, breakdown voltage, and voltage ratio, which are useful for knowing the feasibility of insulation resistance quality with the established standards and next preventive steps. This research took data at Garuda Sakti Main Substation, the data included testing data from polarization index, tangent delta, breakdown voltage, and voltage ratio. The results of the discussion were obtained in transformer 1 and 3 were still within the allowed standard, but there were some parts of transformer insulation that experienced a decrease in quality and preventive maintenance needs to be done. The preventive maintenance step from the deterioration of the polarization index is that cleaning between windings is needed to minimize deterioration. In the breakdown voltage, further examination is needed, such as purifying in order to increase the dielectric strength of oil in the transformer.Keywords - Transformer, Isolation Resistance, Preventive Maintenance, Polarization Index.
Evaluasi Pengaruh Tekanan-Arus pada Kehilangan Fiber melalui NIRS DA1650 Tengku Reza Suka Alaqsa; Zulfatri Aini; Liliana
JURNAL NASIONAL TEKNIK ELEKTRO Vol 13, No 3: November 2024
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jnte.v13n3.1233.2024

Abstract

This study focuses on enhancing the yield of crude palm oil (CPO) during the pressing process by thoroughly examining the oil losses that occur throughout production. The primary aim is to evaluate how different pressures and electric currents impact oil losses from palm fiber at a specific palm oil mill in Pantai Cermin, Kec. Tapung, Kampar, Riau. A systematic methodology was employed to achieve this, which involved detailed measurements conducted using the FOSS NIRS DA1650. This advanced technology allowed for precise assessment and quantification of oil losses during the pressing phase. Following the data collection, a rigorous statistical analysis was performed utilizing determination coefficients to interpret the relationship between the variables. The analysis results revealed a coefficient of determination (R²) of 49.96% concerning pressure, suggesting that nearly half of the variability in oil losses can be explained by fluctuations in pressing pressure. Additionally, the examination of current showed a higher coefficient of determination of 60.09%, underscoring a substantial influence of electric current on fiber oil losses. These findings highlight the critical importance of optimizing pressure and current in palm oil extraction. By making informed adjustments to these parameters, mill operators can significantly reduce oil losses, thus enhancing the overall extraction efficiency. The study provides practical recommendations for operators aiming to improve their processes, ultimately contributing to better resource utilization and increased profitability in the palm oil industry.
Desain Penggunaan Variable Frequency Drive (VFD) Pada Starting-Up Motor Induksi 3 Fasa Menggunakan Metode Sinusoidal Pulse-Width Modulation (SPWM) Sumarta, Prima; Aini, Zulfatri
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 3 (2024): September 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i3.2910

Abstract

During the start up process, the induction motor has a fairly high starting current. It can even reach four to eight times the motor's nominal current. An initial current that is large enough and repeated over a short period of time can cause quite high heat in the motor wire coils and trigger a current break. This occurs due to heat accumulating in the motor system. So repeated incidents within a short period of time can result in damage to the coils and other motor components. To overcome this, a Variable Frequency Drive (VFD) is used which works by periodically increasing the voltage frequency so that it is able to turn off the current at start-up time intervals or is called the Soft Starting method on motors. The VFD modeling design is carried out based on the SPWM topology with the output parameters of current rotation, THD and reactive power. Test results show that motor performance using a VFD is able to reduce current to 110% from previously 620%, reduce Total Harmonic Distortion (THD) from 5.01% to 3.54%, and reduce motor reactive load from 14.31 kVar to 8 kVar with capacitance value 121.78πF.Keywords – VFD, SPWM, Motor Starting, THD.
Steam requirements and mass balance in digesters and screw presses at palm oil mill Zulfatri Aini; Tengku, Tengku Reza Suka Alaqsa; Sri Basriati
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 9 No. 2 (2024)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v9i2.37043

Abstract

Fresh Fruit Bunches (FFB) are the primary component in Crude Palm Oil (CPO) production. Palm oil mills face challenges in optimizing CPO yield, particularly in reducing oil losses during processing, which affects efficiency and profitability. The pressing station, including the digester and screw press, plays an important role in oil extraction. The digester uses steam to heat and soften the fruit for better oil release, while the screw press performs the mechanical extraction of oil. Insufficient steam can hinder oil separation, leading to increased losses. This research aimed to analyze steam requirements for the digester and evaluate the mass balance of the screw press. Using energy and mass balance methods, the optimal steam requirement was 359,870 kg/hour with a mass balance error of 6.58%. Corrective actions in steam valve settings reduced oil losses to 1.57%, which improved processing efficiency and product quality.
Feasibility Study of a Microgrid for Electrifying the Isolated Area Suka Alaqsa, Tengku Reza; Aini, Zulfatri; Eng, Ewe Win
Jurnal Edukasi Elektro Vol. 9 No. 1 (2025): Jurnal Edukasi Elektro Volume 9, No. 1, May 2025
Publisher : DPTE FT UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jee.v9i1.78828

Abstract

Guha Village in Aceh Singkil lacks access to electricity from PLN, with challenging road conditions further complicating energy access. This study explores a feasible microgrid solution, assessing local renewable energy potential and economic viability using HOMER Pro software. Calculations reveal an annual energy demand of 97,334 kWh for 41 households. The analysis identifies a standalone micro-hydro system as the most cost-effective option, capable of partially meeting this demand with an annual output of 296,077 kWh. However, due to a distribution efficiency of 79.6%, the effective supply is 235,961 kWh per year. Financially, the micro-hydro system offers significant advantages, reducing the Net Present Cost (NPC) from Rp5.82 billion to Rp1.10 billion, despite a higher initial capital requirement of Rp825 million. With minimal O&M costs of Rp15 million annually and a Levelized Cost of Energy (LCOE) of Rp987.66/kWh, the system demonstrates substantial long-term savings. Investment metrics show a 49% Internal Rate of Return (IRR), 44% Return on Investment (ROI), and a two-year payback period, making the micro-hydro system a sustainable as cost effective energy solution for Guha Village.
Performance of High-Gain Observer (HGO) For Level Estimation in Continuous Stirred Tank Reactor (CSTR) Dian Mursyitah; Ahmad Faizal; Zulfatri Aini
Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Vol 11 No 2 (2024): Jurnal Ecotipe, October 2024
Publisher : Jurusan Teknik Elektro, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jurnalecotipe.v11i2.4497

Abstract

This paper presents an estimation of level in CSTR system. Due to the non-linearity in the model of the CSTR system, our focus is on observers capable of handling this non-linearity. We proposed to use a High Gain Observer (HGO) for performing level estimation. The desired characteristics for estimation include minimal error, fast convergence time, and robustness in the presence of noisy measurements. A comprehensive analysis of the observers, including the evaluation of their effectiveness and robustness, is presented through simulation
Co-Authors Achiruddin Lubis Ahmad Faizal Ahmad Fudholi Andika, Rizki Aprialdi, Rahmat Candra, Oriza David Setiawan Dian Mursyitah Diar, Abdurahman Dila Marta Putri Efryansah, Randra Agustio Eng, Ewe Win Esa Mutari Hanif Naufal Qasthari Harda Arya, Engla Liliana Liliana liliana liliana Liliana Liliana Lubis, Achiruddin Lubis, Arul Anwar Maharmi, Benriwati Muhammad Guido Randa Febiant Guido Nanda Putri Miefthawati Nanda Putri Miefthawati Putra, Nanda Okta Raditya Saputra Ramadhan, Muhammad Fiqri Rika Susanti Riswan Efendi Sepannur Bandri Sri Basriati Sudarmadi, Ardiansyah Suka Alaqsa, Tengku Reza Sumarta, Prima Sutoyo Sutoyo Tengku Reza Suka Alaqsa Tengku Reza Suka Alaqsa Tengku, Tengku Reza Suka Alaqsa Ullah, Aulia Zainal Ahnur