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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) International Journal of Reconfigurable and Embedded Systems (IJRES) International Journal of Applied Power Engineering (IJAPE) Majalah Ilmiah Teknologi Elektro The Journal of Experimental Life Sciences (JELS) Jurnal Teknik Elektro TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Informatics (IJEEI) JURNAL NASIONAL TEKNIK ELEKTRO Proceeding of the Electrical Engineering Computer Science and Informatics Arty: Jurnal Seni Rupa Jurnal SOLMA JURNAL MUQODDIMAH : Jurnal Ilmu Sosial, Politik dan Hummaniora Buletin LOUPE (Laporan Umum Penelitian) Indonesian Journal of Electrical Engineering and Computer Science International Journal of Electrical, Energy and Power System Engineering (IJEEPSE) Jurnal Kepastian Hukum dan Keadilan Andalasian International Journal of Applied Science, Engineering, and Technology Akuntansi'45 COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Andalas Journal of Electrical and Electronic Engineering Technology Jurnal Andalas: Rekayasa dan Penerapan Teknologi Jurnal Rekayasa elektrika JAMBIS : Jurnal Administrasi Bisnis Eduarts: Jurnal Pendidikan Seni
Syafii .
Electrical Engineering, Dept., Engineering Faculty, Universitas Andalas
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts 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 Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Neuroscience Social Sciences Other

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Program Aliran Daya Untuk Analisis Sistem Distribusi Dengan Penambahan Photovoltaic Model ., Syafii; Maulana, Ricky
JURNAL NASIONAL TEKNIK ELEKTRO Vol 1, No 1: September 2012
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (662.715 KB) | DOI: 10.25077/jnte.v1n1.65.2012

Abstract

Perkembangan teknologi yang semakin pesat memicu kebutuhan akan energi, terutama energi listrik. Kondisi tersebut mengindikasikan bahwa listrik telah menjadi bagian yang sangat penting bagi umat manusia. Di negara berkembang seperti Indonesia, idealnya pertumbuhan listrik 2-2,5 kali lipat dibandingkan pertumbuhan ekonomi. Kenyataannya, saat ini pertumbuhan listrik per tahun hanya 7-8 persen. Penambahan pembangkit dengan energi yang dapat terbarukan menjadi salah satu solusi untuk mengatasi kebutuhan akan listrik. Seperti dengan penambahan pembangkit listrik dengan tenaga matahari atau photovoltaic. Dalam artikel ini, perhitungan aliran daya menggunakan metoda fast decoupled dengan model photvltaic yang terhubung ke jaringan distribusi. Program aliran daya dibangun menggunakan Microsoft visual studio 2010 dengan Bahasa Pemograman C++.Penambahan  variasi jumlah dan ukuran photvoltaic pada sistem distribusi akan mengurangi rugi-rugi daya dan jatuh tegangan. Kata Kunci :Kebutuhan listrik, Photovltaic, Microsoft visual studio 2010, Rugi-rugi daya, Jatuh tegangan
Analisa Pengaruh Integrasi Pembangkit Tersebar dalam Sistem Komposit ., Syafii; Yunus, Syukri; ., Asrizal
JURNAL NASIONAL TEKNIK ELEKTRO Vol 3, No 1: Maret 2014
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1148.226 KB) | DOI: 10.25077/jnte.v3n1.61.2014

Abstract

Electricity demand in Indonesia continues to increase in accordance with the development of science and technology. Therefore, there is a need of reliable power system, qualified , and able to meet all electricity needs. To optimize the reliability of the power system work one is to perform the installation of distributed generation on power composite system. With the installation of distributed generation power loss and voltage drop that occurs can be reduced. In the installation of distributed generation is a lot of things to consider, such as the exact mounting position, the amount of distributed generation, distributed generation large capacity and type of distributed generation technology used. Based on the research results position the optimal placement of distributed generation is located close to the load. The total power loss and transmission systems combined distribution system after the addition of distributed generation has been decreased and voltage profile increased. The losses and voltage drop values  vary based on the variation of distributed generation technologies. Keywords: Distributed generation , Power losses and Voltage profiles  AbstrakPemakaian tenaga listrik di Indonesia terus meningkat seiring dengan semakin berkembangnya ilmu pengetahuan dan teknologi. Untuk itu dibutuhkan sistem tenaga listrik yang andal, berkualitas, dan mampu memenuhi semua kebutuhan tenaga listrik. Untuk mengoptimalkan keandalan kerja sistem tenaga listrik salah satunya adalah dengan pengitegrasian pembangkit tersebar pada sistem tenaga komposit. Dengan terkoneksinya pembangkit tersebar ke jaringan distribusi listrik dapat mengurangi rugi-rugi daya dan jatuh tegangan. Dalam pemasangan pembangkit tersebar ini banyak hal yang harus dipertimbangkan, seperti posisi pemasangan yang tepat, jumlah pembangkit tersebar, besar kapasitas pembangkit tersebar dan jenis teknologi pembangkit tersebar yang digunakan. Berdasarkan hasil penelitian posisi penempatan pembangkit tersebar yang optimal adalah berada dekat dengan beban. Total rugi-rugi daya gabungan sistem transmisi dan sistem distribusi setelah penambahan pembangkit tersebar turun dan profil tegangan semakin baik atau meningkat. Besar kecilnya penurunan rugi-rugi daya dan nilai jatuh tegangan bervariasi tergantung jenis teknologi pembangkit tersebar yang digunakan.Kata Kunci: Pembangkit tersebar, Rugi-rugi daya dan Profil tegangan
Effect analysis of residual magnetism availability level on the success of voltage generation processes in self-excited induction generators Refdinal Nazir; Syafii Syafii; Andi Pawawoi; Fajril Akbar; Yudi Arfan
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 11, No 3: September 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (420.765 KB) | DOI: 10.11591/ijpeds.v11.i3.pp1211-1219

Abstract

The voltage generation process is a very crucial initial stage for the successful operation of the self-excited induction generator (SEIG). The availability of residual magnetism and the adequacy of excitation capacitor value are factors that determine the success of the voltage generation process on the SEIG. This paper analyzes the effect of the availability of residual magnetism on the rotor's magnetic core. With a simple approach, the terminal voltage on the SEIG can be solved through the intersection between the magnetization curve (Xm) and the excitation curve (Xce). The shape and equation of the magnetization curve will be affected by the availability of residual magnetism. The change in residual magnetism availability will cause a change in the intersection point between the magnetization curve (Xm) and the excitation curve (Xce), which will determine the value of voltage generated by the generator. In this study, Newton Rhapson's method with numerical iteration approach has been used to analyze the effect of changes in the availability of residual magnetism on the success of voltage generation on the SEIG. The analysis results have been shown that the availability of residual magnetism with residual voltage values below 1.04 Volt will cause the failure of the SEIG to generate the terminal voltage at its nominal value. Meanwhile, the availability of residual magnetism in SEIG with residual voltage values above 1.04 Volt, will succeed in generating terminal voltage at its nominal value. For SEIG used as the object of this study, the value of Eres = 1.04 Volt is a critical value of the availability of residual magnetism.
Performance and Energy Saving Analysis of Grid Connected Photovoltaic in West Sumatera Syafii Ghazali; Refdinal Nazir
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 7, No 4: December 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v7.i4.pp1348-1354

Abstract

The paper presents performance and energy saving analysis of 1.25 kWp grid connected Photovoltaic system under difference weather condition in West Sumatera.  The measured data were performed during weather data that often occur in West Sumatra i.e. sunny, overcast, raining and cloudy. The synchronizing process successfully done even bad weather conditions when sunlight was low automatically. Photovoltaic in average start producing power from 7:00 AM to 6:00 PM for normal or clear sky, however under overcast, raining and cloudy weather, the PV power decreased and disconnected earlier before sunset. During intermittent raining, overcast and cloud covered the PV power output show an irregular profile. The PV energy saving performed for three residential connection cases: 1300 VA, 900 VA with subsidized and 900 VA without subsidized. The solar PV installation have more benefits and energy saving for 1300 VA, 900 VA without subsidized with payback period around 8.5 years. However, the 900 VA with subsidized take longer 20.8 years, but still in PV lifespan 25 years. In the future, household subsidies may be reduced or eliminated, the solar energy will be viable alternative of energy resources when it can produce electricity at a cost equivalent to utility grid PLN rate. 
Differences in the impact of harmonic distortion due to the installation of electronic load controller in self-excited induction generator and synchronous generator Refdinal Nazir; Syafii Syafii; Andi Pawawoi; Fajril Akbar; Axel Doriza
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 1: March 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v10.i1.pp104-116

Abstract

In general, the application of Self-Excited Induction Generator (SEIG) or Synchronous Generator (SG) on the Stand-Alone Micro Hydel Power Plant (MHPP) is equipped with Electronic Load Controller (ELC) to control generator output during variations in consumer load. One type of ELC that is cheap and rigid developed today is the ELC, which is constructed by the uncontrolled bridge rectifier with DC Chopper. Based on the operational concept, basically this type of ELC can be implemented on both SEIG and SG, but both of these generators will have a different harmonic distortion effect on the output and its load. This paper examines the differences in the effects of harmonic distortions due to ELC installation on SEIG and SG. The initial stage of this study was to design the ELC developed. Then, the harmonic distortion response due to the installation of ELC on SEIG and SG is tested, which includes harmonic distortion in: stator current, PCC voltage, and consumer load current. THDI (Current Total Harmonic Distortion) stator current at SEIG with ELC has shown an average value smaller than the THD stator current in SG with ELC. Likewise, the THDV (Voltage Total Harmonic Distortion) value of PCC voltage and THDI value of the current consumer load on SEIG equipped with ELC has been shown to be smaller than the THDV value of PCC voltage and THDI value of the current consumer load on SG equipped with ELC. The effects of harmonic distortions due to the installation of ELCs that developed in this study on SEIG is still within the permitted limits, while on the SG, the harmonic distortion reduction is needed at the generator output.
On Load Characteristic of the New Design Permanent Magnets Reluctance Generator Andi Pawawoi; Syafii Syafii
International Journal of Applied Power Engineering (IJAPE) Vol 6, No 3: December 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (821.995 KB) | DOI: 10.11591/ijape.v6.i3.pp193-198

Abstract

These The new design of a permanent magnet reluctance generator claimed to be able to convert the energy of the permanent magnet is the source of the main field into electrical energy, so that the generator output power can reach 167% compared with the input power axis. In this paper will discuss the characteristics of the generator voltage when under load, pure resistance, inductive load and caThese The new design of a permanent magnet reluctance generator claimed to be able to convert the energy of the permanent magnet is the source of the main field into electrical energy, so that the generator output power can reach 167% compared with the input power axis. In this paper will discuss the characteristics of the generator voltage when under load, pure resistance, inductive load and capacitive load. The results showed that when given a purely resistive load, the terminal voltage tends to be constant, but if given the inductive load, the voltage drop occurs significantly approaching zero voltage at full load current. It is very different when loaded capacitive load. When the generator under load is capacitive, the generator voltage at full load increased by 224.7% from no-load voltage.pacitive load. The results showed that when given a purely resistive load, the terminal voltage tends to be constant, but if given the inductive load, the voltage drop occurs significantly approaching zero voltage at full load current. It is very different when loaded capacitive load. When the generator under load is capacitive, the generator voltage at full load increased by 224.7% from no-load voltage
Renewable Distributed Generation Models in Three-Phase Load Flow Analysis for Smart Grid Syafii Syafii; K. M. Nor K. M. Nor
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 11, No 4: December 2013
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v11i4.1152

Abstract

The paper presents renewable distributed generation (RDG) models as three-phase resource in load flow computation and analyzes their effect when they are connected in composite networks. The RDG models that have been considered comprise of photovoltaic (PV) and wind turbine generation (WTG). The voltage-controlled node and complex power injection node are used in the models. These improvement models are suitable for smart grid power system analysis. The combination of IEEE transmission and distribution data used to test and analyze the algorithm in solving balanced/unbalanced active systems. The combination of IEEE transmission data and IEEE test feeder are used to test the the algorithm for balanced and unbalanced multi-phase distribution system problem. The simulation results show that by increased number and size of RDG units have improved voltage profile and reduced system losses. 
Unbalanced Active Distribution Analysis with Renewable Distributed Energy Resources Syafii Syafii; K. M. Nor
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 13, No 1: March 2015
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v13i1.960

Abstract

This paper presents unbalanced active distribution system analysis with renewable distributed Energy Resources (DER). The renewable DER models have been considered are photovoltaic (PV) and Wind Turbine generation (WTG). The three-phase distribution load flow on the basis of the symmetrical components have been used in the analysis. The unbalanced active distribution system has been analized using IEEE 13 node feeder and IEEE 8500 node feeder with renewable DER units. The variation of wind speed (m/s) for WTG, solar radiation (W/m²) and temperature (°C) for PV have been simulated. The simulation results show that the proposed DER model can be used to analysis renewable DER impacts in unbalanced distribution system. The integration of renewable DER units into an existing distribution network can improve the voltage profile and reduce total system losses. The simulation results show that DERs size and location are important factors to improve voltage profile and line loss reduction.
OPERASI EKONOMIS (Economic Dispatch) PEMBANGKIT LISTRIK TENAGA SAMPAH (PLTSa) DAN (PLTG) DALAM MELAYANI BEBAN PUNCAK KELISTRIKAN SUMBAR Monice Monice; Syafii Syafii
Jurnal Teknik Elektro Vol 2, No 3 (2013): Jurnal Teknik Elektro
Publisher : Situs resmi ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (224.66 KB)

Abstract

Pemanfaatan sumber energi terbarukan dan peralatan konversinya semakin variatif. Sampah kota sebagai sumber masalah kebersihan, dapat ditinjau sebagai sumber energi alternative dengan teknologi yang ramah lingkungan baik proses maupun produknya. Pembangunan pembangkit listrik tenaga sampah (PLTSa) merupakan solusi kebutuhan energi baru terbarukan (EBT) untuk meningkatkan kebutuhan energi serta membantu mengurangi ketergantungan terhadap bahan bakar (energi fosil). Untuk mengurangi biaya bahan bakar maka penjadwalan optimal unit pembangkit thermal pada sistem perlu dilakukan. Permasalahan yang menyangkut penjadwalan terdiri dari Economic Dispatch yaitu pembagian pembebanan pada setiap unit pembangkit sehingga diperoleh kombinasi unit pembangkit yang dapat memenuhi kebutuhan beban dengan biaya yang optimum.Pembagian beban untuk masing-masing unit pembangkit thermal dapat diperoleh dengan menggunakan metode iterasi lamda. Pembagian beban dengan menggunakan iterasi lamda memberikan hasil yang lebih optimal.
STUDI KAJIAN KELAYAKAN PEMBANGUNAN PEMBANGKIT LISTRIK TENAGA SAMPAH (PLTSA) KOTA PADANG (STUDI KAJIAN DI TPA AIR DINGIN KOTA PADANG) Nofri Dodi; Syafii Syafii; Slamet Raharjo
Jurnal Teknik Elektro Vol 4, No 2 (2015): Jurnal Teknik Elektro
Publisher : Situs resmi ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (134.03 KB)

Abstract

Seiring dengan pertambahan penduduknya setiap tahun dengan beraneka ragam aktifitas kehidupan masyarakatnya selalu menghasilkan sampah setiap harinya. Dibalik semua permasalahan sampah yang ada di kota Padang jika dengan memanfaatkan teknologi yang sudah semakin maju, maka sampah yang ada di TPA Air Dingin kota Padang mempunyai potensi nilai ekonomis dan nilai manfaat secara teknis. Dalam kajian penelitian ini dilakukan kajian tentang potensi yang ada pada sampah yang terdapat di TPA Air Dingin kota Padang. Terdapat 2 kajian yang digunakan dalam kajian penelitian ini. Kajian yang pertama adalah untuk menghitung estimasi kasar produksi gas bio, potensi emisi gas metan dan potensi estimasi energi listrik yang dihasilkan dari potensi sampah yang ada di TPA Air Dingin kota Padang. Sedangkan kajian yang kedua adalah kajian penilaian investasi proyek untuk pendirian PLTSa dari hasil potensi sampah yang ada di TPA Air Dingin kota Padang. Dari hasil perhitungan analisa data diperoleh hasil potensi produksi LFG yang ada di TPA Air Dingin kota Padang sebesar 10.405,76 ton/tahun, daya listrik yang bisa dibangkitkan sebesar 3.215,67 kW dan energi listrik yang bisa dihasilkan sebesar 28.169.259,47kWh.Sedangkan berdasarkan analisa perhitungan investasi proyek yang menggunakan metode least cost didapatkan hasil nilai NPV (Net Present Value) sebesar Rp. 62.709.495.336,- , nilai IRR (Internal Rate of return) sebesar 22,22% dan nilai BCR (Benefit Cost ratio) adalah 12,33 serta nilai PP (Payback Periode) selama 1,13 tahun. Berdasarkan hasil perhitungan analisa data, disimpulkan bahwa TPA Air Dingin kota padang memiliki potensi sampah yang baik untuk dimanfaatkan sebagi bahan baku pendirian Pembangkit Listrik Tenaga Sampah (PLTSa).
Co-Authors ., Cahayahati ., Delima ., Erliwati ., Kamshory Abadi, Akbar Aditio Pribadi, Rizki Adrianti Adrianti Adrianti, Adrianti Agung W. Setiawan Akshar, Muh Alex, Taman Ali Basrah Pulungan Almoataz Youssef Abdelaziz Andi Pawawoi Andrivo Rusydi Arnawan Hasibuan Arya, Engla Harda Asrizal . Aswardi Aswardi Aulia Aulia Aulia Aulia Axel Doriza Azhari Zakri , Azriyenni Azizah, Farah Azriyenni Azhari Zakri Azzahrah, Nadia Fatimah Beni Nugroho, Dionysius Benriwati Maharmi Budi Endarto Cahayahati . Chamdani, Chamdani Dadan Ramdan Danas, Aidil Darmana, Ija Dawam Habibullah Dawam Habibullah Delima . Dina Maizana Dona Juliandri Edyan Noveri Elmiyasna Kimin Elysia Sholiha, Almira Rahma Endang Tri Wahyuni Erliwati . Fahreza, Rahmad Fajril Akbar Farah Azizah Fierda Nurany, Fierda Fikriyatullatifah, Anisa Fitriyan, Rahmawati Gumilar, Candra Habib Satria Habib Satria Habibullah, Dawam Hanalde Andre Handayani, Mia Putri Hasdi Putra, Hasdi Herris Yamashika Herris Yamashika Heru Irianto Ija Darmana Ika Putri, Kartika Ilham Cholid Ilhamdi Rusydi, Muhammad Imam Fauzi Ath Thaariq Indrajaja, Nobella Indri Dayana Irfan El Fakhri Ita Merni Patulak Jaka Windarta Juliandri, Dona K. M. Nor K. M. Nor K. M. Nor Kamsidjo Budi Utomo Kamsory Kamsory, Kamsory Kartika Ika Putri Kartika Sri Kumala Sari Khin Moe Moe Kurniawan, Sulistyo Agung Dwi Kusnadi, Sekar Ayumeida Laksono, Heru Dibyo Layrenshia, Belinda Leily Wustha Johar Liambana, Junlianty Lovely Son, Lovely M. Yonggi Puriza Maharmi, Benriwati Marroh, Zahrotul Isti'anah Matalata, Hendi Maulidi, M. Alfi Moe, Khin Moe Mohammad Taufiq Hidayat Monice Monice Moranain Mungkin Muhammad Fadlan Siregar Muhammad Hadi Putra, Muhammad Hadi Muhammad Imran Hamid Muhammad Khahfi Zuhanda Muhammad Nasir Muhammad Nurdin Muhammad Ridha Fauzi Muhardika Muhardika Mumtazah, Lutfia Anis Muzamir Isa Nasir, Hikmah Afifah Nasir, Muhammad Nofri Dodi Noor Azahra, Anggraeni Noviandri, Dian Novizon, Novizon Nur Izrillah, Imra Nurdin, Muhammad Nurmarini, Eva Perdana Putra, Ilham Prihadini, Diana Purwadhi Purwadhi Putri, Lusi Ngestina Rahmad B.Y Syah Rahmad Fahreza Rahmawati Fitriyan Refdinal Nazir Ricky Maulana Ridwan, Ridwan Rizka Hadelina Roni Putra Rudi Salam Rusydi, Muhammad Ilhamdi Salfikri, Iqbal Sapto Nisworo Since Yuliana Frans, Inggrid Slamet Raharjo Sugiono Sugiono Syah, Rahmad B. Y. Syah, Rahmad B.Y Syukri Yunus Tahrir, Muhammad Thoriq Kurnia Agung Thoriq Kurnia Agung Veranita, Mira Wati Wati Wati Wati Wati, Wati Welly Yandi Yandi, Welly Yona Mayura Yudi Arfan Yusdiansyah, Yusdiansyah Zahroni, Teguh Rizali Zarta, Abdul Rasyid Zulwisli .