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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING RELE: Rekayasa Elektrikal dan Energi Jurnal Teknik Elektro Hasil Pengabdian Kepada Masyarakat Rang Teknik Journal Indonesian Journal of Electrical Engineering and Computer Science Jurnal Darma Agung Bulletin of Computer Science and Electrical Engineering (BCSEE) Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences Schrodinger : Jurnal Ilmiah Mahasiswa Pendidikan Fisika Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Rohana Ismail
Magister Electrical Engineering, Universitas Muhammadiyah Sumatera Utara, Indonesia
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences

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Mitigation of high voltage induction effect on ICCP system of gas pipelines: a field case study Rohana Ismail; Arnawan Hasibuan; Muzamir Isa; Faizar Abdurrahman; Nurul Islami
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 6: December 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v17i6.12493

Abstract

An analysis of the high voltage induction effect on the impressed current cathodic protection (ICCP) system on pipelines parallel toward high voltage power lines was employed in this research. Mitigation of high voltage effect throught human and environment is necessary to implemented. Direct current induction was used to increase the electrical potential of the gas pipeline, from Klumpang to sicanang area, Indonesia. During the mitigation process, the highest induction value was obtained 0.00574 KV which is previously was 0.01732 KV, and occurred at the limit of the allowable secure touch tension value of 0.015 KV. The data that acquire from the measurement of test point of ICCP underneath the transmission line revealed a comparison data between field measurements occurred of mitigation process. The direct current induction method is found to be safe for ICCP system and environment.
Calculation of Consumption and Expenditures for Electricity Energy Costs at Lido Graha Hotel Lhokseumawe City Based on Electrical Power Measurement Arnawan Hasibuan; Widyana Verawaty Siregar; Elvy Sahnur Nasution; Rohana Ismail
Bulletin of Computer Science and Electrical Engineering Vol. 1 No. 2 (2020): December 2020 - Bulletin of Computer Science and Electrical Engineering
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.913 KB) | DOI: 10.25008/bcsee.v1i2.1124

Abstract

Evaluation of energy utilization and identification become energy saving opportunities, as well as recommendations for increasing efficiency, on energy use and use of energy sources in the context of energy conservation This paper aims to describe the audit of electrical energy in the Lido Graha Lhokseumawe Hotel room, by taking samples in different room types and conducting an electrical energy audit on the use of installed lights and air conditioners. The method used in this study is data collection, interviews, observations and direct measurements on the use of lights and AC (Air Conditioning). The data analysis technique used is to determine the estimated value of electricity consumption and how much it will cost for electricity. From the results of calculations and analysis obtained total electricity consumption needs based on the type of room with various types of loads used 855.62 kWh/days with costs that must be spent per day is Rp. 1,190,574.96, 25,668.6 kWh/month with a monthly cost of Rp. 35,087,608.60. Whereas for a year electricity demand is 308,494.8 kWh/year with a cost of Rp. 421,051,305.24.
Study Feasibility Analysis of Biodiesel Energy Processing Used Cooking Oil Suwarno Suwarno; Rohana Rohana; Ihsanurrizqie Indra Siregar
Budapest International Research and Critics Institute (BIRCI-Journal): Humanities and Social Sciences Vol 4, No 3 (2021): Budapest International Research and Critics Institute August
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birci.v4i3.2616

Abstract

In research on renewable power plants. Fuel from petroleum, if consumed continuously, will run out over time. Research on alternative fuels to replace petroleum-based fuels continues to be carried out, one of which is research on Biodiesel/Biosol. Biodiesel is a substitute for diesel fuel derived from vegetable raw materials. The advantage of biodiesel over diesel is that it is more environmentally friendly. Biodiesel has started to be produced and marketed in Indonesia. Used cooking oil is easy to obtain, therefore the production of biodiesel from used cooking oil can be carried out by small industries. The process of producing biodiesel from used cooking oil uses the transesterification method. This research is expected to provide benefits as a business opportunity for small industrial-scale biodiesel production, provide economic value to used cooking oil, overcome household and industrial waste disposal, provide input to the industry so that they can produce fuel independently, and provide input to local governments so that they can producing biodiesel so that it becomes an energy-independent area. The physical test results of biodiesel from used cooking oil showed a density of 0.8780 gr/ml, a viscosity of 6.118 mm 2/s, a flashpoint of 178 oC, a carbon residue of 0.0006 %Wt, an ash content of 0.0397% WT, and a gross heating value of 19400 BTU/lb. In general, biodiesel has physical properties similar to diesel so it can be used as a mixture of diesel or diesel fuel substitutes.
Analisis Perbandingan Tahanan Pentanahan Pada Elektroda Batang Dan Plat Untuk Perbaikan Nilai Resistansi Pembumian Hefri Yuliadi; Surya Hardi; Rohana Rohana
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Publisher : RELE (Rekayasa Elektrikal dan Energi) : Jurnal Teknik Elektro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (674.078 KB) | DOI: 10.30596/rele.v4i1.7828

Abstract

Abstrak Tersedianya sistem pentanahan haruslah memiliki nilai tahanan pentanahan yang sekecil-kecilnya. Untuk mendapatkan nilai tahanan pentanahan dengan nilai tertentu dipengaruhi oleh beberapa faktor seperti : bentuk sistem pentanahan, jenis tanah, suhu tanah, kelembaban tanah, diameter elektroda, kandungan elektrolit tanah dan lain-lain, Elektroda pentanahan dapat berupa batang yang ditanam tegak lurus atau ditanam sejajar permukaan tanah, dan berupa lempeng atau plat, yang kesemuanya ini dirancang untuk memperkecil tahanan pentanahan dari hasil pengukuran dan perhitungan didapat nilai tahanan pentanahan pada hasil pengukuran diatas, menunjukkan kedalaman elektrode pentanahan adalah sedalam 1.5 m, pada kedalaman ini nilai tahanan pentanahan adalah 0.98 ? Pada Elektroda Batang sedangkan pada elektroda Plat sebesar 1,6 ?. Dan perhitungan tahanan pentanahan dengan mempergunakan Rumus Dwight, pada elektroda batang nilai rata-rata sebesar 0.9 ? dan Plat, nilai rata-rata sebesar 0.5 ? . Terdapat perbedaan antara hasil perhitungan dan pengukuran hal ini dikarenakan perbedaan persepsi jenis elektroda yang digunakan. Hal Sudah 1 ? memenuhi syarat PUIL, 2000, untuk jenis tanah basah dan lembab.Kata kunci : Resistansi, Elektroda Batang, Plat, Standart PUIL 2000Abstract The availability of a grounding system must have the smallest grounding resistance value. To obtain a grounding resistance value with a certain value is influenced by several factors such as: the shape of the grounding system, soil type, soil temperature, soil moisture, electrode diameter, soil electrolyte content and others. the ground surface, and in the form of plates or plates, all of which are designed to reduce grounding resistance. From the results of measurements and calculations, the value of grounding resistance is obtained from the measurement results above, indicating the depth of the grounding electrode is 1.5 m deep, at this depth the value of grounding resistance is 0.98 ?. The rod electrode, while the plate electrode is 1.6 ?. and the calculation of the ground resistance using Dwight's formula, the average value of the rod electrode is 0.9 ? and the plate, the average value is 0.5 ?. There is a difference between the results of calculations and measurements this is due to differences in the perception of the type of electrode used. It is 1 ? meets the requirements of PUIL, 2000, for wet and moist soil types. Keywords : Resistance, Rod Electrode, Plate, PUIL Standard 2000
PKM Pengembangan Rumah Produksi Elvy Sahnur Nasution; Rohana Rohana; Rizki Fadhillah Lubis
JURNAL PRODIKMAS Hasil Pengabdian Kepada Masyarakat Vol 3, No 1 (2018)
Publisher : Universitas Muhammadiyah Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.305 KB) | DOI: 10.30596/jp.v3i1.2673

Abstract

Regumuk village community groups have planned to build a production house where production houses are planned to be used as a place for processing mangrove processing, but the construction of production houses is still abandoned due to lack of planning and design and funding for the construction of the production house. The Community Imaging Program (PKM) aims to develop production houses for community groups in the Regression Village that can be used for processing mangrove products, starting from mangrove materials, the exact technology used, and as a place for mangrove products after being cooked or produced so that community groups can produce mangrove products without having to wait for orders and can produce more and faster processed products. because activities can be done at any time of the day or night because of the night. With the development of production houses in stages, comfortable production houses can be produced and are expected to increase the production of processed mangrove communities while at the same time increasing community income. All activities provided to the Regemuk community are accompanied by experts. The activity is expected to help and accelerate the improvement of the community's economy. With sustainable PKM activities means sustainable community empowerment so that it can create a prosperous society.
Perbandingan Penambahan Material Asbes Dan Gypsum Dengan Campuran NaCl Dan Arang Untuk Mereduksi Resistansi Pentanahan (Aplikasi: Balai Besar Pengembangan Penjaminan Mutu Pendidikan Vokasi Bidang Bangunan Listrik Medan) Hefri Yuliadi; Surya Hardi; Rohana Rohana
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Publisher : RELE (Rekayasa Elektrikal dan Energi) : Jurnal Teknik Elektro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (925.126 KB) | DOI: 10.30596/rele.v5i1.10785

Abstract

Abstrak Sistem pentanahan menjadi bagian terpenting dari sistem tenaga listrik untuk mengamankan peralatan-peralatan listrik maupun manusia yang berlokasi di sekitar gangguan dengan cara mengalirkan arus gangguan ke tanah. Salah satu faktor untuk mendapatkan nilai tahanan pentanahan yang kecil sesuai dengan PUIL, selain kedalamam penanaman elektroda, tahanan jenis tanah yang akan di buat sebagai penempatan pentanahan harus kecil, untuk mengatasi tahanan pentanahan yang relative besar di perlukan zat aditif untuk mereduksi tahanan pentanahan, material asbes dan gypsum dan campuran NaCl-Arang dipilih untuk mereduksi nilai tahanan pentanahan. Pengukuran dilakukan menggunakan metode tiga titik yang dilakukan pada setiap variasi kedalaman elektroda dan komposisi material aditif yang digunakan untuk menurunkan nilai tahanan pentanahan. Pengukuran ini bertujuan untuk mengetahui material aditif asbes dan gypsum dengan campuran arang NaCl serta komposisi yang baik antara keduanya untuk mereduksi tahanan pentanahan di bawah atau sama dengan 5 ohm menurut PUIL. Dari hasil analisis diperoleh kesimpulan bahwa perbandingan persentase penurunan nilai tahanan pentanahan zat aditif Asbes dan Gypsum dan campuran NaCl (garam) Karbon (arang) adalah pada Asbes sebesar 69,40% sedangkan pada Gypsum sebesar 73,64%. Hal ini menunjukkan bahwa dari hasil perbandingan persentase hasil pengukuran dan perhitungan menyatakan persentase penurunan nilai resistansi pentanahan yang lebih baik dari aditif Gypsum.Kata kunci : Tahanan Pentanahan, Asbes, Gypsum, Garam, ArangAbstract The grounding system is the most important part of the electric power system to secure electrical equipment and humans located in the vicinity of the fault by flowing fault current to the ground. One of the factors to get a small grounding resistance value according to PUIL, in addition to the depth of the electrode implant, the soil type resistance that will be made as a grounding placement must be small, to overcome the relatively large grounding resistance, additives are needed to reduce grounding resistance, asbestos and gypsum materials and a mixture of NaCl-Charcoal were chosen to reduce the value of grounding resistance. Measurements were carried out using the three-point method which was carried out at each variation of the electrode depth and the composition of the additive material used to reduce the value of the grounding resistance. This measurement aims to determine the additive material of asbestos and gypsum with a mixture of charcoal-NaCl and a good composition between the two to reduce grounding resistance below or equal to 5 ohms according to PUIL. From the results of the analysis, it can be concluded that the ratio of the percentage decrease in the value of the grounding resistance of Asbestos and Gypsum additives and a mixture of NaCl (salt) - Carbon (charcoal) is 69.40% for Asbestos while 73.64% for Gypsum. This shows that the results of the comparison of the percentage of measurement and calculation results indicate that the percentage reduction in the value of the grounding resistance is better than the Gypsum additive.Keywords : Earthing Prisoners, Asbestos, Gypsum, Salt, Charcoal
Optimization Circuit Based Buck-Boost Converter for Charging the Solar Power Plant Rohana Rohana; Suwarno Suwarno
Indonesian Journal of Electrical Engineering and Computer Science Vol 6, No 2: May 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v6.i2.pp254-258

Abstract

This paper discusses the optimization circuit based buck-boost converter for charging a battery from solar panel modules. The combination of the circuit buck-bust converter and a step-up current can increase the percentage of battery chargers. The method used in the optimization of solar power plants by increasing the output current from the solar panel to be optimized for battery charging, so it does not requires time and the batteries are safe. This is because sunlight can be used when bright about 4-5 hours per day. By increasing the output current of the current produced solar modules can accelerate the battery charging time. The combination of using the voltage stabilizer can produce a steady output voltage and current riser, although the voltage to an output of the solar panels is quite small (± 6 volts), can optimize the charger works well. By combining between the voltage stabilizer and a step-up current is obtained that the incoming voltage to the battery at 12,4V the current rise of 21.5% for a 12V battery, 7Ah, whereas the incoming voltage to the battery at 12,1V the current rise 10.99% for battery 12V, 120Ah. This study shows that the current rise is already above 10%.
Comparison Model Hargreaves, Annandale and New Model for Estimation of Solar Radiation in Perlis, Malaysia Suwarno Suwarno; Rohana Rohana
Indonesian Journal of Electrical Engineering and Computer Science Vol 6, No 2: May 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v6.i2.pp286-293

Abstract

Sunlight is a potential source of electrical energy in the universe. Utilization of solar radiation is not optimal to be a source of electricity generation. Before harnessed solar radiation in order to know in advance the estimated potential energy. Modelling estimates of solar radiation in three models: models Hargreaves, Annandale and the proposed new model. The new model proposed solar radiation estimates based on models Hargreaves and Annandale. Some models for estimating solar radiation is discussed in this paper which aims to determine the potential of solar radiation into electrical energy potential. A new model is proposed to estimate solar radiation. Comparison of the three models are estimated using statistical analysis e (%), CRM, and RMSE is obtained that the proposed new model is better, when compared to other models.
ANALISA SAMBARAN PETIR TERHADAP SISTEM PROTEKSI TOWER TELEKOMUNIKASI MENGGUNAKAN SIMULASI SOFTWARE ATP DRAW Riza Ria Wirasari; Surya Hardi; Rohana Rohana; Muchsin Harahap
Rang Teknik Journal Vol 5, No 2 (2022): Vol. 5 No. 2 Juni 2022
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (771.584 KB) | DOI: 10.31869/rtj.v5i2.3416

Abstract

The increase in the telecommunications network was accompanied by the addition of the number of BTS (Base Transceiver Station) in various regions. The BTS (Base Transceiver Station) tower is built with a minimum height of 25-100 meters. BTS towers are equipped with external and internal grounding protection systems that are designed and installed in accordance with SNI. The protection system is a unified protection system for towers and telecommunications equipment from lightning strikes. Lightning strikes occur randomly which cannot be ascertained and their occurrence is controlled and lightning strikes also cause damage to the object that is struck. ATP Draw is a graphical program from the Electromagnetic Transient Program (EMTP) for Windows. Software Alternating Transient Program (ATP Draw) is used for digital simulation of impulse waves. In this software a lightning protection system is modeled in the form of an electrical circuit, and a lightning impulse waveform against a lightning protection system circuit. analyzed the lightning protection system on the BTS tower by performing simulations using ATP Draw software with a power line model with Standard IEC 1.2 x 50 s showing the simulation results of a lightning surge current of 30389 A. for a lightning surge input current of 80 kA, 36088 A for a lightning current input lightning surge of 95 kA, and 37987 A for lightning surge input current of 100 kA. For modeling the standard CIGRE 3.3x77.5μs power line, the simulation results for a lightning surge current of 40644 A for a lightning surge input current of 80 kA, 48264 A for a lightning surge input current of 95 kA, and 50805 A for a lightning surge input current of 100 kA.
PERENCANAAN GARDU HUBUNG DITINJAU DARI ASPEK TEKNIS DROP TEGANGAN UNTUK PERBAIKAN SISTEM KELISTRIKAN KOTA MEDAN Oni Afriyandi; Surya Hardi; Rohana Rohana
JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING Vol 6, No 1 (2022): Journal of Electrical and System Control Engineering
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jesce.v6i1.6767

Abstract

Pembangunan Gardu Hubung Teladan bertujuan untuk percepatan dalam pemindahan dan pengendali beban listrik ketika pemadaman listrik terjadi, program pelaksanaan pemeliharaan atau untuk maksud mempertahankan kontinuitas pelayanan di kota Medan. Rekonfigurasi jaringan dilakukan dengan memindahkan beban sebahagian dari Penyulang TT05, Penyulang DA05, Penyulang DA06 dan Penyulang DN03. Beban penyulang tersebut dialihkan ke Gardu Hubung Teladan melalui Penyulang ACSTL01 sebesar 54,4 amper, Penyulang ACSTL02 sebesar 28,1 amper, Penyulang ACSTL03 sebesar 34,4 amper dan Penyulang ACSTL04 sebesar 31,5 amper. Rekonfigurasi jaringan di Gardu Hubung Teladan mengakibatkan perubahan data parameter dari jaringan saat ini diantaranya drop tegangan yang diijinkan maksimum 5 %, tegangan kerja pada Gardu Hubung Teladan masih terpenuhi. Dengan pembangunan Gardu Hubung Teladan diperoleh konfigurasi jaringan yang optimal sesuai standard teknis Persentase Vd (Voltage Drop) terbesar berada di section 3 Penyulang DN03 Gardu Induk Denai sebesar 2,73%, sesuai SPLN no 72 tahun 1987 masih terpenuhi.
Co-Authors AA Sudharmawan, AA Adam Pangestu Arnawan Hasibuan Elvy Sahnur Nasution Faizar Abdurrahman Fauzi Bramantyo Hardi, Surya Hefri Yuliadi Hefri Yuliadi Ihsanurrizqie Indra Siregar Muchsin Harahap Muhammad Fitra Zambak Muzamir Isa Nurul Islami, Nurul Oni Afriyandi Riza Ria Wirasari Rizki Fadhillah Lubis Surya Hardi Surya Hardi Suwarno Suwarno Suwarno, Suwarno Widyana Verawaty Siregar