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All Journal Jurnal Edukasi Elektro JTEV (Jurnal Teknik Elektro dan Vokasional ELKHA : Jurnal Teknik Elektro SITEKIN: Jurnal Sains, Teknologi dan Industri JURNAL NASIONAL TEKNIK ELEKTRO PROtek : Jurnal Ilmiah Teknik Elektro Briliant: Jurnal Riset dan Konseptual Seminar Nasional Teknologi Informasi Komunikasi dan Industri CYCLOTRON JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI G-Tech : Jurnal Teknologi Terapan MSI Transaction on Education Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Power Elektronik : Jurnal Orang Elektro Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics Jurnal Teknik Elektro
Liliana Liliana
Universitas Islam Negeri Sultan Syarif Kasim Riau
Humanities Biochemistry, Genetics & Molecular Biology 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 Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Public Health Social Sciences Other

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ANALISIS PENGARUH MATERIAL MAGNET PERMANENT TERHADAP KARAKTERISTIK GENERATOR SINKRON RADIAL 18 SLOT 16 POLE tahlil darmiayu putri; Liliana Liliana Liliana
Power Elektronik : Jurnal Orang Elektro Vol 11, No 1 (2022): POWER ELEKTRONIK
Publisher : Politeknik Harapan Bersama Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/polektro.v11i1.3279

Abstract

Pemanfaatan potensi energi angin telah menghasilkan perkembangan pada perancangan generator magnet permanen 18 slot 16 pole. Pada perancangan generator magnet permanen 18 slot 16 pole hanya mampu menghasilkan efisiensi sebear 70%. Penelitian ini bertujuan untuk menaikkan efisiensi dari generator tersebut.  Pada paper ini akan melakukan percobaan dengan memasukkan inputan material permanen magnet untuk melihat pengaruh dari material magnet permanent Ceramic Ferrite, PM12: Br 1.2 mur 1.0, Neodymium Iron Boron, dan Samarium cobalt terhadap karakteristik dan efisiensi dari generator magnet permanen 18s16p dengan mengggunakan software berbasis Finite Element Method. Hasil percobaan pada model yang menggunakan material PM12: Br 1.2 mur 1.0 menghasilkan efisiensi terbesar yaitu 91%, diikuti oleh material Neodymium Iron Boron yaitu sebesar 90%, lalu material Samarium cobalt sebesar 89%, dan Ceramic Ferrite sebesar 87%. 
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.
Pengaruh Ukuran Kawat dan Jarak Alur Stator Terhadap Nilai Arus Starting Motor Induksi 3 Fasa Hendrick, Fran; Liliana, Liliana
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.v9i3.2868

Abstract

The use of electric motors in industry often experiences damage caused by several things, including high starting current surges, overload or full load, loss of one phase in the electric motor, and other causes of damage to the 3-phase motor. The main problem that occurred in this research was damage caused by high starting currents, where in the case study many 3-phase motors were used to drive factory machines. The use of 3-phase motors to drive factory machines is often damaged by unstable currents in the machines. This is because the time and workers for monitoring are very minimal and the materials for repairing machines are inadequate. In this way, the solution for repairing a 3-phase motor is to replace and rewind the damaged motor so that it can be used again. This research aims to find a solution on how to reduce high starting currents in 3-phase motors by utilizing the influence of replacing damaged induction motor components as well as repair methods used in starting when rewinding 3-phase motors. The research results from the groove distance with a wire size of 0.90 mm showed that the groove distance of 9, 9, 8 was 29.3, and at a distance of 10, 10, 10 it had a current of 31 A with no-load testing and recommended groove distances of 10, 10, 10. Next, testing wire sizes of 0.75 mm and 0.90 mm with distances of 10, 10, 10, and 9, 9, 8 without load obtained 26.1 A and 27.4 A while 0.90 mm was 30, 7 A and 28, 1 A. The load was 43.5 A and 43.9 A, while 0.90 mm was 51.3 A and 49.3 A. From the test results, the largest current decrease was at a distance of 10, 10, 10 with a wire size of 0.75 mm. Keyword - 3 Phase Induction Motor, Groove Spacing, Starting, Wire Size.
Peformance Analysis of Automatic Voltage Regulator (AVR) as a 3-Phase AC Generator Excitation Voltage Supply Controller: Analisis Kinerja Automatic Voltage Regulator (Avr) Sebagai Pengontrol Suplai Tegangan Eksitasi Generator Ac 3 Phasa Liliana, Liliana
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 1 No 1 (2021): IJEERE Juni 2021
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.781 KB) | DOI: 10.57152/ijeere.v1i1.88

Abstract

The voltage generated by the generator will always change due to the fluctuating load. The output voltage must be kept constant within the desired value to ensure the supply of generator output power to meet the load requirements, a device called an AVR (Automatic Voltage Regulator) is needed. AVR aims to regulate the amount of excitation current supplied to the generator and the amount of excitation current is directly proportional to the amount of voltage generated by the generator. This study aims to analyze the performance of the AVR in maintaining the stability of the generator output voltage and power. Monitoring the performance of the AVR installed on the generator is carried out for 31 days. The results of monitoring and analysis after the generator installed AVR, it can be seen that the output voltage is in stability with a variation in the value between 11.59 kV to 11.8 kV while the generator output power is also still in stability with a variation in values ??between 38.1 MW to 38.3 MW. Keywords: generator, Automatic Voltage Regulator, excitation current, output voltage, output power
Analisis Penggunaan Proteksi Arus Lebih Pada Generator Studi Kasus PLTU Teluk Sirih: Analisis Penggunaan Proteksi Arus Lebih Pada Generator Studi Kasus PLTU Teluk Sirih Saputra, Ramadian
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 3 No 2 (2023): IJEERE December 2023
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v3i2.990

Abstract

The generator is one of the main components in the Teluk Sirih PLTU as a producer of electricity that will be supplied to consumers. The generator itself is not spared from existing disturbances. One of the disturbances that can occur in a generator is an overcurrent disturbance caused by a short circuit. Therefore the generator must be given a protection, namely an overcurrent relay which is useful for giving a signal to the PMT to open the circuit. In this report, we will test the performance of the overcurrent relay installed on the generator by looking for settings based on a 3-phase short circuit fault in one of the bus areas. The data used is in the form of Generator, Transformer and Overcurrent Relay specification data. Then from the data a series will be made and simulated using the ETAP 19.0.1 application. Based on the simulation that has been carried out, it is found that the magnitude of the 3-phase short circuit fault current in the Bus 2 area is 41501 A. Meanwhile for the overcurrent relay setting, the relay current is 3.39 A, the set current in the relay setting is 5982.757 A and the time is 0.34 s with a CT ratio of 1600:1. The result obtained is that the relay works according to the existing settings when a fault occurs and instructs the PMT to open the circuit.
Penyetingan Rele Differensial Sebagai Proteksi Pada Transformator Daya 52 MVA Unit 4 PLTA Singkarak: Differential relay settings as protection on a 52 MVA Unit 4 Power Transformer PLTA Singkarak Ardiansyah, M. Rafli
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 4 No 1 (2024): IJEERE June 2024
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v4i1.1405

Abstract

The protection system for electrical equipment is used to identify any disturbances and monitor any damage that may occur such as there is a difference between the incoming/primary and outgoing/secondary currents, and other electrical disturbances. One of them is the power transformer, of course the impact of these disturbances, if not resolved, will disrupt the power system at the plant. Then one solution is to use a protection device in the form of a differential relay. The purpose of preparing this report is to set up selective differential relays on power transformers. The method used in this report is manual and mathematical calculations on CT ratios, mismatch errors, restrain currents, differential currents, setting currents, CT secondary currents, and percent slope. After doing the mathematical calculations, we get the differential relay current setting, which is 0.21 A. The factory default setting is 0.3 A, or 30%, with the following assumptions: 10% for current transformer (CT), 1% for excitation settings , 4% for setting mismatch, 5% for safety factor, and 10% for setting leads. Differential Relay can function when the differential current is greater than the setting current; in this case, the relay will cause the circuit breaker to trip.
Sistem Proteksi Arus Lebih dengan Menggunakan SEPAM 1000+ T40 pada Transformator di Unit WHRPG PT. Semen Padang : Overcurrent Protection System Using SEPAM 1000+ T40 in the Transformer In The WHRPG Unit PT. Semen Padang Alfian, Defri
Indonesian Journal of Electrical Engineering and Renewable Energy (IJEERE) Vol 4 No 1 (2024): IJEERE June 2024
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/ijeere.v4i1.1458

Abstract

The transformer is an important piece of equipment in the WHRPG generator system which functions to change the electric voltage from high to low or vice versa. In the transformer interference can occur which can damage the transformer. Therefore, it is necessary to have proper transformer protection to ensure safe operation and avoid damage that can disrupt the distribution of electric power. So that the related objective of this existing problem is protection is carried out to overcome disturbances that occur in transformers with equipment in the form of SEPAM 1000+ type T40. The method used is by collecting data on power transformer specifications, SEPAM 1000+ specifications and overcurrent relay settings for later analysis and calculations related to the magnitude of the fault current and the magnitude of the relay current setting. Based on the specifications of the transformer and the existing disturbances, the results show that the SEPAM 1000+ T40 in the WHRPG functions to protect the transformer from overcurrent disturbances, ground faults and overload disturbances, for the maximum current value on the transformer is 146.63 A, while the maximum overcurrent disturbance that can occur is 2,443.8 A, so that from the value of the disturbance, an overcurrent elay setting value of 175.95 A is obtained with a relay working time of 0.25 s. Then input the results of the settings earlier into SEPAM 1000+.
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.
Failure Preventive Action terhadap Keandalan Sistem Distribusi liliana, liliana
Seminar Nasional Teknologi Informasi Komunikasi dan Industri 2024: SNTIKI 16
Publisher : UIN Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Keandalan sistem tenaga listrik merupakan hal yang sangat penting dalam pendistribusian tenaga listrik ke pelanggan. Keandalan sistem yang buruk dipengaruhi oleh gangguan-gangguan yang terjadi baik secara internal maupun eksternal. Tujuan penelitian ini adalah memperbaiki nilai keandalan yang buruk dengan tindakan Failure Preventive Action. Pertama sekali yang dilakukan adalah menghitung indeks keandalan SAIFI, SAIDI dan CAIDI kondisi existing. Setelah diberikan perlakuan maka diperoleh indeks keandaaan yang baru. Berdasarkan data sekunder SAIFI, SAIDI dan CAIDI dari PT. PLN ULP Payakumbuh menunjukan indeks keandalan terburuk di Feeder 5 Halaban dengan SAIFI sebesar 9,45 kali/thn, SAIDI sebesar 9,72 jam/thn dan CAIDI sebesar 1,039 jam/plg/thn. Indeks Keandalan tersebut belum sesuai dengan SPLN 86-2:1986. Perhitungan indeks keandalan berdasarkan data monitoring gangguan harian di Feeder 5 Halaban menghasilkan   indeks keandalan SAIFI 11,4 kali/thn, SAIDI 11,85 jam/thn dan CAIDI 1,039 jam/plg/thn.. Tindakan melakukan Failure Preventive action terhadap komponen dilakukan untuk mengurangi penyebab kegagalan peralatan yang terjadi berdasarkan data lapangan di Feeder 5 Halaban. Setelah diberikan tindakan Failure Preventive Action, hasil indeks keandalan SAIFI 5,51 kali/thn, SAIDI 4,32 jam/thn dan CAIDI 0,78 jam/plg/thn. Tindakan ini mampu memperbaiki nilai indeks keandalan SAIFI 51,6%, SAIDI 63,5%, dan CAIDi 24,5%.
Analysis of the Effect of Core Thickness and Rotational Speed on the 24 Slot 16 Pole Permanent Magnet Synchronous Generator on PMSG Characteristics Syarief, Ahmad Ridwan; Liliana, Liliana
PROtek : Jurnal Ilmiah Teknik Elektro Vol 11, No 1 (2024): PROtek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v11i1.6141

Abstract

Electrical energy has become a basic need that cannot be eliminated in everyday life for Indonesian people, where the source of electrical energy is currently still fossil fuels. One way to overcome excessive exploitation of fossil fuels is to utilize renewable energy sources, namely wind energy. Wind has a great potential for generating electrical energy with the conversion that occurs in the Permanent Magnet Synchronous Generator (PMSG). PMSG is one of the components in a wind power plant (PLTB). Current wind conditions in Indonesia cause low efficiency in PMSG, where many things affect this, one of which is power losses in the generator, copper losses caused by the copper winding on the stator getting hot, and iron losses because the generator has bearings. get hot. Many factors can cause efficiency to increase, such as the core speed and core thickness used in PMSG. In this paper, an image of the 24 slot, 16 pole PMSG model will be created with variations in rotational speed and core thickness using the MagNet Infolytica software by simulating the software using the Finite Element Method (FEM). Variations of speed used are 250 rpm, 500 rpm, and 750 rpm, with variations in core thickness of 40 mm, 60 mm, and 80 mm. The simulation results that occur in variations in current, voltage, torque, input power, and input power all increase according to Faraday's law. The highest efficiency value was obtained at 82.20% at a core thickness of 40 mm and a rotating speed of 500 rpm, with a current value of 9,926 Amperes, a voltage of 99,263 Volts, a torque of -22,904 Nm, an input power of 1198.64 Watts, and an output power of 985.28 Watts
Co-Authors A Fahrezi, Irgi Andaiyani, Sri Candra, Oriza Delafena, Irfan Esa Mutari Guido, Muhammad Guido Randa Febiant Hanif Naufal Qasthari Hendrick, Fran Hidayat, Ariodillah Irgi A Fahrezi Irvan Nurhadi Nurhadi Juwita, Retno Sari Mahendra, Kariza Awal Mahmudah, Aryatul Mardalena Mardalena Nanda Putri Miefthawati Rafika Andari Sepannur Bandri Sepannur Bandri Shodrokova, Xenaneira Syahputra. I Syarief, Ahmad Ridwan tahlil darmiayu putri Tengku Reza Suka Alaqsa Ullah, Aulia Zulfatri Aini Zuriman Anthony