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All Journal Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Pengembangan Energi Nuklir TELKOMNIKA (Telecommunication Computing Electronics and Control) Prosiding Semnastek ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Syntax Literate: Jurnal Ilmiah Indonesia Energi & Kelistrikan Jurnal Teknik Elektro dan Komputasi (ELKOM) International Journal of Computer and Information System (IJCIS) Automotive Experiences CITIZEN: Jurnal Ilmiah Mulitidisiplin Indonesia Andalas Journal of Electrical and Electronic Engineering Technology Journal of Advanced Technology and Multidiscipline (JATM) International Journal of Engineering Continuity Leuser Journal of Environmental Studies International Journal of Electrical, Computer, and Biomedical Engineering (IJECBE)
Iwa Garniwa
Department Of Electrical Engineering, Faculty Of Engineering, Universitas Indonesia, Depok 16424, Indonesia
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Relationships between Excitation Voltage and Performance of AFWR Synchronous Generator Abdul Multi; Iwa Garniwa
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 11, No 3: September 2013
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v11i3.983

Abstract

            The axial flux wound rotor generator has field winding that should be connected to a dc voltage source. Varying the excitation voltage, its electric performance might  be controlled to meet the need of a load voltage attached to its terminal. The generator designed is small-scale capacity which has 1 kW, 380 V and 750 rpm. The generator has a single double-sided slotted wound stator sandwiched between twin rotor. The effect of excitation voltage changes on its performance can be seen from the result of calculations using the given equations.The calculation results reveal electric quantities suited with respect to performance of the machine. If the voltage is higher then the losses will be lower. However, the higher the voltage, the higher the efficiency and the torque.It has been found out that for the excitation voltage11 V, the efficiency and the torque are 85.12 % and 13.04 Nm respectively.
Determining the Excitation Voltage of Axial Flux Wound Rotor Synchronous Generator Abdul Multi; Iwa Garniwa
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 11, No 2: June 2013
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v11i2.926

Abstract

The axial flux wound rotor generator has field winding that must be connected to a dc voltage source. By varying the excitation voltage, its electric performance might  be controlled to meet the need of a load voltage attached to its terminal. The designed generator is small-scale capacity which has 1 kW, 380 V and 750 rpm. The generator has a single double-sided slotted wound stator sandwiched between twin rotor. The effect of excitation voltage changes on its performance can be seen from the result of calculations using the given equations. The calculation results reveal electric quantities suited with respect to performance of the machine. If the voltages increase, the losses will decrease; but higher the excitation voltage, higher the efficiency and the terminal voltage. It has been found out that for the excitation voltage11 V, the efficiency and the terminal voltage are 85.12 % and 380V respectively.
OPTIMALISASI PENYALURAN DAYA PLTN DI PULAU BANGKA UNTUK SISTEM KELISTRIKAN SUMATERA Citra Candranurani; Iwa Garniwa
Jurnal Pengembangan Energi Nuklir Vol 14, No 1 (2012): Juni 2012
Publisher : Pusat Kajian Sistem Energi Nuklir, Badan Tenaga Nuklir Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jpen.2012.14.1.1471

Abstract

ABSTRAKANALISA PENYALURAN DAYA PLTN DI PULAU BANGKA UNTUK SISTEM KELISTRIKAN SUMATERA. Target bauran energi yang tertuang dalam perpres No. 5 Tahun 2006 mentargetkan sebesar 2 % dari total kebutuhan energi nasional di tahun 2025 akan bersumber dari energi nuklir. Badan Tenaga Nuklir Nasional (BATAN) selaku promotor untuk persiapan pembangunan Pembangkit Listrik Tenaga Nuklir (PLTN) telah membuat roadmap jangka panjang, dimana pada tahun 2024 di rencanakan PLTN dari pulau Bangka sudah masuk ke dalam sistem kelistrikan Sumatera. Untuk menunjang hal tersebut maka dilakukan persiapan perencanaan sistem dan jaringan di Sumatera. Perencanaan ini dibuat dengan bantuan perangkat lunak Electrical Transient Analyzer Program (ETAP). Asumsi pada penelitian ini ada tiga, yaitu pertumbuhan beban sebesar 10,2% pertahun hingga tahun 2024, penambahan PLTN dengan kapasitas 2x1000 MW di pulau Bangka, serta pembuatan sistem dan jaringan transmisi untuk penyaluran daya PLTN pada sistem interkoneksi Sumatera. Dari hasil penelitian diperoleh optimalisasi penyaluran daya PLTN pada sistem Sumatera yang terbaik adalah melalui sub sistem Sumatera Utara yaitu melalui IBT Seirotan atau Paya geli. Nilai losses keseluruhan sistem pada penyaluran ini adalah 157 MW atau 1,646 %. Penyaluran daya PLTN pada IBT ini memberikan perbaikan kondisi tegangan IBT yang terbaik yaitu sejumlah 43,4%.Kata kunci: optimalisasi, losses, sistem tenaga listrik, PLTN ABSTRACTANALYSIS OF NPP POWER DISTRIBUTION IN BANGKA ISLAND FOR ELECTRICITY SYSTEM OF SUMATERA. Energy diffusion target on the regulation No. 5, 2006, says that 2 % of total national energy need is come from nuclear energy. National Nuclear Energy Agency (BATAN) as the promoter of the development Nuclear Power Plant(NPP), has made a long term roadmap, whereas in the year of 2024, Nuclear Power Plant from Bangka Island will be injected to the Sumatera interconnection system. For the system and transmission planning preparation, the simulation has been made with Electrical Transient Analyzer Program (ETAP) Software. The are three assumption in this research, 10,2 % annual load growth until 2024, enhancement of NPP with 2 x 1000 MW capacity at Bangka island, and improvement of the system and transmission line to deliver the power from NPP to Sumatera interconection system. The research result gives that the optimum power distribution by north sumatera sub system through IBT Seirotan or Paya Geli. Total losses whole systemof this distribution is 157 MW or 1,646%, and improvement total IBT condition voltage as many as 43,4 %.Keywords: optimization, losses, electrical power system, nuclear power plant
ANALISIS RUGI – RUGI DAYA PADA PENAMBAHAN PEMBANGKIT DISTRIBUTED GENERATION DI SISTEM KELISTRIKAN BAU – BAU DAN RAHA Widya Astriyani; Iwa Garniwa
Prosiding Semnastek PROSIDING SEMNASTEK 2018
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Indonesia merupakan negara kepulauan dengan sistem kelistrikan terbagi – bagi di setiap pulaunya. Studi kali ini menjadikan Sistem Kelistrikan Bau – Bau dan Raha sebagai obyek studi dimana kedua pulau tersebut memiliki sistem kelistrikan yang saling terkoneksi. Sehingga dalam aplikasinya Sistem Bau – Bau dan Sistem Raha termasuk ke dalam sistem terdistribusi. Dalam memenuhi kebutuhan beban di Sistem Bau – Bau dan Sistem Raha maka hal yang paling memungkinkan saat ini adalah penambahan pembangkitpembangkit baru. Penambahan pembangkit baru di dalam suatu sistem distribusi saat ini lebih dikenal sebagai distributed generation (DG). Penambahan distributed generation baru di dalam sistem distribusi tentunya akan mempengaruhi kondisi rugi – rugi teknis (losses) pada sistem tersebut. Studi ini menggunakan ETAP Power Station versi 16.0.0 sebagai media untuk menghitung rugi - ruhi sistem yang diakibatkan adanya distributed generation baru pada Sistem Bau – Bau dan Sistem Raha. Perhitungan losses sistem dibagi atas dua skenario dimana skenario pertama adalah saat pembangkit listrik distributed generation dikoneksikan dengan bus 20 kV gardu induk di Bau – Bau, sedangkan untuk skenario kedua adalah pembangkit distributed generation akan dikoneksikan kepada salah satu bus 20 kV terujung penyulang. Setelah dilakukan kalkulasi hasil rugi - rugi sistem pada skenario pertama adalah sebesar 8,735% sedangkan rugi – rugi sistem yang dihasilkan dari simulasi skenario kedua adalah sebesar 8,443%.
STUDI PENERAPAN ENERGY SAVING PERFORMANCE CONTRACT DALAM EFISIENSI ENERGI LISTRIK SEKTOR BANGUNAN GEDUNG DI INDONESIA Femy Sanana Sanvia; Iwa Garniwa
Prosiding Semnastek PROSIDING SEMNASTEK 2018
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Sektor bangunan gedung merupakan salah satu pengguna energi listrik terbesar. Sistem pada bangunan gedung yang menggunakan energi listrik terbesar, antara lain adalah sistem tata udara, sistem pencahayaan, dan sistem transportasi gedung. Energy Saving Performance Contract (ESPC) dapat menjadi salah satu alternatif dalam mendukung implementasi efisiensi energi pada sektor bangunan gedung hingga 10-30%. Studi ini menginvestigasi penerapan ESPC dalam retrofit perangkat sistem tata udara pada gedung, yaitu Chiller. Retrofit perangkat Chiller dapat menghasilkan efisiensi energi listrik sebesar 210 MWh/tahun atau mengurangi konsumsi energi listrik hingga 30% dengan investasi payback period 5 tahun. Studi ini dapat diperluas untuk mengembangkan penerapan ESPC di Indonesia.
Economic and Financial Analysis of Cofiring the Coal Fired Steam Power Plant Capacity 660 MW with Biomass Widya Faisal Wahyudi; Iwa Garniwa M.K.
Andalas Journal of Electrical and Electronic Engineering Technology Vol. 1 No. 1 (2021): May 2021
Publisher : Electrical Engineering Dept, Engineering Faculty, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (364.739 KB) | DOI: 10.25077/ajeeet.v1i1.11

Abstract

Research on Cofiring of the Existing Coal Fired Power Plant with biomass in the form of sawdust with a mixture percentage of 5% was carried out with the main objective of pursuing the acceleration of the renewable energy mix target of 23% (Green Booster) by 2025, with minimal CAPEX costs if compared to building new hydro or solar PV plants. At the initial stage of the activity, testing and analysis of the effect of cofiring will be carried out on several main parameters of the Existing PLTU's performance, as well as its reliability. In addition, it is also at the same time to get an overview and evaluate if the cofiring plan will be implemented through technical operational evaluations, the cost of production from the aspect of fuel costs (component C) and exhaust emissions to the environment. From the results of monitoring the operating load at around 635 MW (gross) using 5% cofiring, it can be seen that critical points such as main steam temperature, main steam pressure, gas economizer outlet temperature, mill outlet temperature do not show a significant increase, meaning they are still within the operating limits, reasonable and safe. From the calculation of the cost of fuel, the coal price is IDR 594 per kg, and sawdust price of IDR 472 per kg (on site) using the SFC difference of 0.0077 kg/kwh, and the CF assumption of 80%, then with an average annual electricity production of 4,415,040,000 kwh/year, fuel savings of around IDR 35.32 billion per year will be obtained. Exhaust gas emissions to the environment for SO2 and NOx still meet the environmental quality standard requirements according to the Minister of Environment and Forestry Regulation No.15 of 2019.
Analysis of The Impact of Sedimentation Dredging on Headloss Repair & Operating Patterns of CWP (Circulating Water Pump) PLTU Lontar Muhammad Pinandhito Adi Dharma; Iwa Garniwa
Energi & Kelistrikan Vol 14 No 1 (2022): Energi dan Kelistrikan: Jurnal Ilmiah
Publisher : Sekolah Tinggi Teknik PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33322/energi.v14i1.1649

Abstract

The PLTU Lontar Extension Project (1x315 MW) is a national strategic project being built by PT. PLN (Persero). The project stage is currently in the commissioning phase but is hampered by indications of sedimentation occurring at the intake mouth area of ​​the Circulating Water System. There are indications of sedimentation at the intake mouth due to the high head loss between the intake mouth and the upstream box culvert which has an impact on inhibiting the flow of seawater entering the Lontar PLTU intake canal. The existence of obstacles to the flow of sea water has resulted in insufficient cooling water flow for the needs of 8 Circulating Water Pump (CWP) pumps, namely 6 CWP for 3 units of PLTU Existing and 2 CWP for 1 unit of PLTU Extension. The sea bed level on the side of the intake mouth according to the basic design is -4.5 m but after the survey (bathymetry, topography, floating sediment, currents, tides) the actual condition is currently at a depth of -0.9 m. As one solution, the dredging method is taken to restore conditions according to the basic design. To find out if there is an improvement in headloss, a simulation is carried out using the Hec-ras 2D application. After the simulation, it was found that the headloss/compression loss significantly improved in the hydraulic simulation with a flow rate of 42 m3/s at 6 pumps running, before dredging 30 cm and after dredging to 18 cm and also with a flowrate of 60 m3/s at 8 pumps running. , before dredging 55 cm and after dredging to 21 cm at the right position upstream of the box culvert. This headloss condition is predicted to propagate downstream to the forebay and CWP pump pits, so that dredging in this area is simulated to increase the performance of the Lontar PLTU circulating water intake so that 8 CWPs can operate together continuously.
Optimasi Battery Energy Storage System Dalam Mengatasi Renewable Energy Intermittency dan Load Leveling Novi Indriani; Iwa Garniwa
Jurnal Teknik Elektro dan Komputasi (ELKOM) Vol 4, No 1 (2022): ELKOM
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/elkom.v4i1.7216

Abstract

Perkembangan pemanfaatan energi terbarukan di Indonesia saat ini tumbuh pesat, salah satunya adalah penggunaan Photovoltaic (PV). Namun masalah intermittency masih menjadi isu dari sisi pengoperasian PV. Untuk itu diperlukan adanya suatu storage system yang dapat mensuplai daya dengan cepat ketika PV tidak dapat beroperasi karena kondisi cuaca. Battery Energy Storage System (BESS) merupakan salah satu teknologi Energy Storage System yang dapat beroperasi dengan cepat untuk mensuplai kebutuhan listrik guna menjaga kehandalan sistem dan menstabilkan penggunaan listrik dari energi terbarukan, seperti panel surya dan turbin angin. Battery Energy Storage System (BESS) sebagai alternatif dari teknologi penyimpanan jangka pendek yang berfungsi untuk meningkatkan suplai daya pada saat beban puncak dan curtailment sistem PV serta jangka panjang sebagai penyimpanan energi pada sistem kelistrikan di Pulau Timor. Pada studi ini diusulkan model yang mengintegrasikan PV System dan BESS terhadap sistem kelistrikan Pulau Timor dimana saat ini kebutuhan listriknya disuplai dari Pembangkit Listrik Tenaga Uap (PLTU), Leasing Marine Vessel Power Plant (LMVPP), Pembangkit Listrik Tenaga Diesel (PLTD) dan Pembangkit Listrik Tenaga Surya (PLTS). Model ini digunakan untuk mengetahui dampak integrasi PV-BESS terhadap Biaya Pokok Produksi (BPP) sistem. Meskipun harga BESS ini masih relatif mahal namun diharapkan dengan penggunaan BESS ini dapat meningkatkan kehandalan sistem, meningkatkan bauran EBT dan mengurangi dampak lingkungan karena emisi. Simulasi dilakukan dengan membandingkan BPP sistem pada kondisi normal, kondisi intermitensi PV dan load leveling. Nilai BPP sistem dari hasil simulasi intermitensi PLTS dengan menggunakan BESS sebesar Rp 2.188,9/kWh dan simulasi Load leveling dengan BESS sebesar Rp. 2.174,11/kWh. BPP sistem untuk kedua simulasi tersebut masih lebih rendah jika dibandingkan dengan BPP sistem tanpa BESS yang berkisar Rp 2.202,01/kWh. Secara keekonomian BESS dapat menurunkan BPP sistem setempat.
UTILITY FACTOR ANALYSIS AND COST OWNERSHIP OF THE PLUG-IN HYBRID ELECTRIC VEHICLE (MITSUBISHI OUTLANDER PHEV) Hanafi Anis Alamri; Iwa Garniwa
Citizen : Jurnal Ilmiah Multidisiplin Indonesia Vol. 2 No. 3 (2022): CITIZEN: Jurnal Ilmiah Multidisiplin Indonesia
Publisher : DAS Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53866/jimi.v2i3.137

Abstract

Recently, attention to CO2 or greenhouse gas emissions has increased. The need to reduce it is also increasing in various countries. One of them is by reducing gas emissions from vehicles. Due to increasingly sophisticated technological advances, many vehicle manufacturers worldwide have switched to electric vehicles. In the world, various types of electric vehicle models have been developed, one of which is the Plug-in Hybrid Electric Vehicle or PHEV. In Indonesia, this vehicle is very suitable for your energy conditions because fuel oil is still abundant, and there are many ways to build power plants. The potential of PHEV vehicles to reduce greenhouse gas emissions is highly dependent on the use of the vehicle and its energy sources, namely gasoline and electricity. However, PHEVs' specific benefits or impacts ultimately depend on vehicle buying and usage patterns. Some parameters are the value of the utility factor (UF) and the value of expenditure efficiency when owning a vehicle or Total Cost Ownership (TCO). Comprehensive results by calculating the UF value can help users understand the actual energy consumption more clearly and TCO to determine the expenses incurred by PHEV users. This study will show the UF and TCO values of one of the PHEV vehicles in Indonesia, namely the Mitsubishi Outlander PHEV.
Reliability Evaluation of Transformer Oil Insulation with H2O Water and Super O2 Water Contaminants Disaster Mitigation Electrical Engineering Christiono R; Iwa Garniwa; Miftahul Fikri; Andi Amar Thahara
International Journal of Engineering Continuity Vol. 1 No. 2 (2022): ijec
Publisher : Sultan Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (394.015 KB) | DOI: 10.58291/ijec.v1i2.46

Abstract

Transformer oil insulation failure is one of them that can cause water to penetrate through the mechanical acrylic cap on the OLTC (on load tap changer) which causes contaminants in the transformer insulation oil which affects the reliability of the transformer until there is damage to the transformers widely. For this reason, research was carried out to evaluate the reliability of transformer oil insulation with contaminants of H2O water and Super O2 water. This study is to evaluate the effect of water contaminants with experimental methods using BAUR Oil Tester test equipment, with H2O water and super O2 as samples of water contaminants on transformer oil insulation. According to SPLN 49-1: 1982, the standard value of breakdown voltage in insulating oil is ≥30kV/2.5mm. Then, 1ml of H2O water will be given so that a decrease in the breakdown voltage value of 31.5% is obtained and this experiment is carried out up to 10ml, which means that the more H2O is given, the value of the breakdown voltage is further away from the SPLN standard. Meanwhile, insulating oil contaminated with super O2 water obtained a breakdown voltage of 68% which means that the more super O2 water, the more the reliability of transformer oil insulation decreases, and the breakdown voltage value also decreases which adversely affects the reliability of the transformer.
Co-Authors Abdul Multi Abdul Multi Agus Sugiyono Ahmudi, Ali Andi Amar Thahara Aritenang, Wendy Arumbinang, Nimas Ayu Aulia, Hilmi Zaky Azhar, Fakhrudin Budi Sudiarto CHRISTIONO CHRISTIONO Citra Candranurani Daulay, Andini Dwi Khairunnisa Efendi, Juwani Femy Sanana Sanvia Fikri, Miftahul Frederick Sakaja Ginting Hanafi Anis Alamri Harahap, Saskia Saraswati Hudaya, Chairul Jufri, Fauzan Hanif Krishananto, Thomas Puri Monika, Ratih Muhammad Pinandhito Adi Dharma Nainggolan, J M Novi Indriani Oh, Seongmun Purba, Kevin Pangestu Putra, Kharisma Darmawan Putranugraha, Derry Raharjo, A Raldi Hendro Koestoer, Raldi Hendro Samual, Muhammad Gillfran SAPUTRA, DWI CAHYA AGUNG Semedi, Jarot Mulyo Sidqi, M. Ahsin Sikumbang, Supriyanto Suwargono, Son Uno Sudibyo Widya Astriyani Widya Faisal Wahyudi Widyantara, Dwitiya Bagus Yumnaristya, Syefiara Hania Z Day, Faizatul Hasanah