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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 PROtek : Jurnal Ilmiah Teknik Elektro 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) 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 Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Public Health Social Sciences Other

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Analysis of the Effect of an Installation of a Single Tuned Passive Filter on Harmonics and Distribution Transformers Zulfatri Aini; Zainal Ahnur; David Setiawan; Ahmad Fudholi
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 9, No 3: September 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (744.067 KB) | DOI: 10.11591/ijpeds.v9.i3.pp1285-1294

Abstract

Non-linear loads on power systems cause harmonics and losses in distribution transformers. Results of the measurements on the two distribution transformers showed several phase transformer test-driven development (TDD) values above the standard SPLN D5.004-1: 2012. The values were 5.58% in the phase transformer, T 1 and 5.48% and 6.10% in S and T phases of the second transformer, respectively. In the calculations, the transformer losses due to harmonic currents were 1.64 kW in the phase transformer T 1, and 1.64 kW and 1.82 kW in the S and T phases of transformer 2, respectively. Designing a single-tuned passive filter based on the characteristics of the current, voltage, power, and power factor in the phase transformer with a value above the TDD standard can reduce the harmonics and losses. A filter with different specifications in each filtered phase transformer was obtained. The filter reduced the TDD value on the phase transformer T 1 to 3.55% and to 3.88% and 3.43% on the on phase T and S phases of transformer 2.  Moreover, it reduced the losses to 0.73 kW on phase transformer T 1, and 1.02 kW and 0.92 kW on the S and T phases of transformer 2. 
Analisis Kestabilan Tegangan dengan Menggunakan Static Synchronous Compensator (Statcom) Zulfatri Aini
SITEKIN: Jurnal Sains, Teknologi dan Industri Vol 9, No 2 (2012): Juni 2012
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/sitekin.v9i2.586

Abstract

Pengoperasian jaringan transmisi daya listrik saat ini dituntut untuk bekerja secara cepat,akurat dan handal, agar kebutuhan permintaan beban terpenuhi. Salah satu usaha untuk memenuhi tuntutan tersebut, dengan mejaga kestabilan tegangan pada jaringan. Untuk itu perlu suatu teknologi baru yang bersifat fleksibel dan sensitifitas tinggi yaitu, FACTS (Flexible AC Transmission System), dimana FACTS ini memiliki beberapa jenis dengan fungsi yang berbeda-beda sesuai fungsinya. Pada penelitian ini, jenis yang digunakan adalah Static Synchronous Compensator (STATCOM)Static Synchronous Compensator (STATCOM), merupakan peralatan penyedia daya reaktif yang dapat mengurangi rugi-rugi daya aktif sehingga kestabilan tegangan pada jaringan transmisi listrik terjaga. STATCOM dapat mengatur arus induktif atau pun kapasitif pada sistem jaringan arus bolak balik. Pada  penelitian ini, studi aliran daya dengan metode Newton-Raphson, yang dieksekusi dengan perangkat lunak Matlab.                Penelitian ini memperoleh hasil penurunan rugi-rugi total daya aktif pada jaringan transmisi sebesar 1% persen, dengan Profil tegangan semua bus berada dalam batasan yang telah ditetapkan (stabil). 
Analisis Peramalan Beban Listrik Jangka Pendek Wilayah Sumbar Riau dengan Menggunakan Model Autoregressive (AR) Zulfatri Aini
SITEKIN: Jurnal Sains, Teknologi dan Industri Vol 9, No 1 (2011): Desember 2011
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/sitekin.v9i1.601

Abstract

Tersedianya tenaga listrik yang mudah dalam memenuhi kebutuhan masyarakat serta menjamin kualitas pelayanannya, merupakan syarat penting untuk meningkatkan taraf kehidupan masyarakat, maka salah satu usaha yang dapat dilakukan adalah diperlukan peramalan energi listrik yang akan terjadi di Wilayah Sumbar-Riau masa datang. Penelitian ini dilakukan untuk memperoleh peramalan kondisi beban listrik yang terjadi di Sumbar-Riau. Data yang digunakan adalah data saat beban puncak tahun 2010, dengan menggunakan metode Autoregressive (AR). Sehingga dengan menggunakan metode AR didapatkan model untuk peramalan beban tahun berikutnya. Hasil penelitian menunjukan bahwa peramalan untuk lima hari berikutnya pada tahun 2011, adanya penurunan beban listrik dari data aktual saat beban puncak.
Analisis Penjadwalan Unit-Unit Pembangkit Listrik Dengan Menggunakan Metode Unit Decommitment (PT.PLN Wilayah Riau) Zulfatri Aini
Jurnal Momentum ISSN 1693-752X Vol 13, No 2 (2012): Volume 13 No 2 Agustus 2012
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4466.8 KB)

Abstract

Besarnya kebutuhan energi listrik oleh masyarakat di wilayah Riau sehingga PT. PLN Persero Sektor Pembangkitan sebagai perusahaan listrik nasional dituntut untuk selalu menjaga ketersediaan, kesinambungan, kuantitas dan kualitas energi listrik yang baik serta harga yang terjangkau. Untuk memenuhi kebutuhan masyarakat akan listrik tersebut, PT. PLN Persero Sektor Pembangkitan akan membuat rencana operasi sistem tenaga listrik jangka pendek yaitu penjadwalan operasi unit-unit pembangkit listrik dengan tujuan menekan biaya bahan bakar seminimal mungkin. Dimana dalam sistem pengoperasian tenaga listrik, biaya bahan bakar merupakan biaya yang paling besar yaitu 60% dari biaya operasi keseluruhan. Penjadwalan operasi unit-unit pembangkit merupakan penentuan kombinasi unit-unit pembangkit yang hidup dan mati untuk memenuhi kebutuhan beban sistem pada suatu periode tertentu. Metode Unit Decommitment digunakan untuk menyelesaikan masalah penjadwalan operasi unit-unit pembangkit listrik, dimana pada kondisi awal semua pembangkit dianggap beroperasi pada tiap jamnya sehingga sistem memiliki supply yang berlebih akibatnya hasil operasi sistem tidak ekonomis oleh sebab itu beberapa unit harus dipertimbangkan untuk dimatikan pada periode tertentu. Berdasarkan perhitungan dan hasil analisis penjadwalan operasi pada hari senin 12 Desember 2011 diperoleh penghematan total biaya operasi bila dibandingkan dengan penjadwalan pada PT. PLN (Persero) Sektor Pembangkitan Pekanbaru yaitu sebesar Rp. 1.112.722.573,3297 (32,8%). Dari hasil perhitungan diatas dapat disimpulkan bahwa penjadwalan operasi unit-unit pembangkit listrik dengan metode Unit Decommitment dapat memberikan penjadwalan yang efisien dan efektif dalam menekan biaya operasi pembangkit listrik.
Reliability Improvement Using Sectionalizer with Section Technique Method liliana liliana; Zulfatri Aini; Hanif Naufal Qasthari
Seminar Nasional Teknologi Informasi Komunikasi dan Industri 2021: SNTIKI 13
Publisher : UIN Sultan Syarif Kasim Riau

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

Abstract

Unreliability in the 20 kV distribution system at PT. PLN (Persero) Rayon Rumbai feeder Rusa is more caused by disturbances that occur. During 2020 this feeder was recorded to experience the highest disturbance of 83 times, causing the system to experience frequent blackouts. This study seeks to identify and improve the reliability of the system in the feeder. The reliability of the system can be calculated and analyzed in more detail with the Section Tehnique method. This method can identify reliability by breaking the system into several sections so that the reliability of each section can be known. The increase in reliability is done by adding a sectionalizer to a system that has low reliability, there are two scenarios that are carried out in placing this sectionalizer correctly to produce better reliability. The results of the calculation of the reliability of each section of the system using the Section Technique method have been obtained, the average value of each reliability index is SAIFI 11.231 (f/customer.yr), SAIDI 30.55 (hr/customer.yr), CAIDI 11.015 (hr/customer interruption). ). The results of this index calculation do not meet the standards of SPLN 68-2 1986 with SAIFI 3.2 (f/customer.yr) and SAIDI 21.9 (hr/customer.yr). The reliability improvement was carried out by implementing sectionilizer on the feeder and the reliability index was obtained with SAIFI values 9.8185 (f/customer.yr), SAIDI 27.5292 (hr/customer.yr) and CAIDI 11.223 (hr/customer interruption) with an increase in SAIFI percentage. by 10.4%, SAIDI 8.8% and CAIDI 0.37%. With the addition of a sectionilizer, it is very helpful in increasing reliability, although it still does not meet the expected standard values.Unreliability in the 20 kV distribution system at PT. PLN (Persero) Rayon Rumbai feeder Rusa is more caused by disturbances that occur. During 2020 this feeder was recorded to experience the highest disturbance of 83 times, causing the system to experience frequent blackouts. This study seeks to identify and improve the reliability of the system in the feeder. The reliability of the system can be calculated and analyzed in more detail with the Section Tehnique method. This method can identify reliability by breaking the system into several sections so that the reliability of each section can be known. The increase in reliability is done by adding a sectionalizer to a system that has low reliability, there are two scenarios that are carried out in placing this sectionalizer correctly to produce better reliability. The results of the calculation of the reliability of each section of the system using the Section Technique method have been obtained, the average value of each reliability index is SAIFI 11.231 (f/customer.yr), SAIDI 30.55 (hr/customer.yr), CAIDI 11.015 (hr/customer interruption). ). The results of this index calculation do not meet the standards of SPLN 68-2 1986 with SAIFI 3.2 (f/customer.yr) and SAIDI 21.9 (hr/customer.yr). The reliability improvement was carried out by implementing sectionilizer on the feeder and the reliability index was obtained with SAIFI values 9.8185 (f/customer.yr), SAIDI 27.5292 (hr/customer.yr) and CAIDI 11.223 (hr/customer interruption) with an increase in SAIFI percentage. by 10.4%, SAIDI 8.8% and CAIDI 0.37%. With the addition of a sectionilizer, it is very helpful in increasing reliability, although it still does not meet the expected standard values.
Analysis of Imbalance Loads and Losses Based on The Largest Loading by 3 Units of 3 Phase Distribution Transformer Zulfatri Aini; Esa Mutari; Liliana Liliana; Oriza Candra
JTEV (Jurnal Teknik Elektro dan Vokasional) Vol 7, No 1 (2021): JTEV (Jurnal Teknik Elektro dan Vokasional)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (244.709 KB) | DOI: 10.24036/jtev.v7i1.111965

Abstract

The imbalance load of distribution transformers often occurs.This is due to the fact that the load time amongst consumers is not the same, so that there is a difference in the value for each R, S, and T phase. The value difference of the phase causes overload in several phases so as the current emerges in neutral transformers. The current flowing in the neutral transformers causes the losses. In this research, the identification of the overload and the calculation of the distribution transformer load with the IEC reference standard which is allowed for 80% and the calculation of the imbalance transformer load with the 5% standard, then the losses resulting from the presence of neutral currents were carried out. There are three transformers in the Hangtuah feeder that have a load exceeded the standard, namely the DRI 0157, DRI 0241, and DRI 0065 transformers. The calculations for the three transformers are taken from measurement data in the form of voltage and current values for each phase during the daytime and nighttime and are simulated using ETAP 12.6.0 software. The symmetrical component method was used to obtain the imbalance value of the transformer load based on the measurement results and the ETAP simulation. The result of this research is the imbalance load occured in the three transformers. DRI 0241 is the transformer that has the largest percentage of an imbalance load at night. At nighttime, based on the measurement results of the DRI 0241, the transformer load is 80% and 65% at daytime, while for the imbalance load at nighttime and daytime are 32.2% and 29.8%, respectively. The greater the loading of the transformer, the larger the imbalance loading of transformer becomes. The current in neutral transformer generated losses in the amount of 45 A and 2.4% at nighttime while for 33 A and 1.2% at daytime. The neutral current affects the values of losses that the higher it is, the bigger the losses appear in a transformer.
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.
Co-Authors 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 Liliana liliana liliana Liliana Liliana Lubis, Achiruddin Lubis, Arul Anwar Muhammad Guido Randa Febiant Guido Nanda Putri Miefthawati Putra, Nanda Okta Ramadhan, Muhammad Fiqri Sepannur Bandri Suka Alaqsa, Tengku Reza Sumarta, Prima Sutoyo Sutoyo Tengku Reza Suka Alaqsa Ullah, Aulia Zainal Ahnur