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Tri Nurwati
Departemen Teknik Elektro, Universitas Brawijaya
Education

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KOMPARASI DAYA ONE AXIS SOLAR TRACKER BERBASIS SUDUT MATAHARI DAN FIX SOLAR PANEL Gabriella Yolanda Krisanti; Tri Nurwati; Erni Yudaningtyas
Jurnal Mahasiswa TEUB Vol. 11 No. 4 (2023)
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Indonesia is located on the equator so it has abundant sunlight all year. Solar energy is a potential energy source that can serve as an alternative energy to generate electricity. Utilization of solar energy to produce electricity using a semiconductor device, namely solar panels. Solar panels that are commonly used are solar panels that do not follow the movement of the sun (fixed solar panels). The absorption of solar energy in solar panels can be increased by making solar panels follow the direction of the sun's movement or commonly called solar trackers. One type of one-way solar tracker movement refers to the azimuth side movement. The angular movement of the sun with reference to the azimuth side can be predicted using calculations. Calculation of the angular movement of the sun depends on the time and location of data collection which includes latitude, longitude, and time zone. The data is then processed and produces the sun's azimuth angle which is the reference for the movement of the solar tracker. Increased absorption of solar energy can be shown through the greater power efficiency between the solar tracker and fixed solar panels. The efficiency results for increasing the power of the solar tracker averaged 21.228% from the tests on April 15, 16, 17 and 30, 2023. Keywords: Solar Panel, Solar Tracker, Calculation of the Angle Movement of the Sun, Power
PENGARUH LAPISAN HIDROFOBIK PADA PERMUKAAN ISOLATOR POLIETILEN BERBENTUK SIRIP TERHADAP TINGKAT ARUS BOCOR DAN TEGANGAN FLASHOVER DALAM KONDISI BASAH DAN KERING Faisal Shidqi; Moch. Dhofir; Tri Nurwati
Jurnal Mahasiswa TEUB Vol. 11 No. 5 (2023)
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This study describes the effect of the hydrophobic coating on the surface of the fin-shaped insulator on the level of leakage current and flashover voltage. The research method used to collect data on leakage current and contact angle directly at the High Voltage Engineering Laboratory of the University of Brawijaya, with the experiment voltage varying between 2 kV, 4 kV, 6 kV, 8 kV, 10 kV, 12 kV, and 14 kV. The experiment begins with determining the value of each insulator, specifically before and after the hydrophobic coating, tested in dry and wet conditions with wetting discharge variations of 10, 30, and 60 mL/s, which corresponds to the trend of rainfall in Indonesia. The study's findings include knowing the level of leakage current in each insulator, particularly when comparing dry conditions and the presence of wet conditions with an increase in wetting discharge so that the surface resistance and power loss caused by the insulator are known. According to the study's findings, the addition of coating reduces leakage current, and the greater the addition of the number of fins, the lower the level of leakage current. Furthermore, the leakage current is affected by the wetting discharge, with the increase in the insulator's level leakage current being directly proportional to the addition of wetting discharge. Keywords — polyethylene isolator, corner contact, hydrophobic, flashover, leakage current, wet and dry conditions
PENGENDALI ALIRAN GAS HIDROGEN PADA MASUKAN DAN KELUARAN PROTON EXCHANGE MEMBRANE FUEL CELL DENGAN BEBAN DINAMIS Muhammad Faqih Alfalah; Waru Djuriatno; Tri Nurwati
Jurnal Mahasiswa TEUB Vol. 11 No. 5 (2023)
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Fuel cells are a source of environmentally friendly energy materials because they use hydrogen gas as their main ingredient. Fuel cells themselves have various types and this research uses a type of Proton Exchange Membrane Fuel Cell which uses polymer materials as its main component to produce electrical energy. The purpose of this study is to control the flow of hydrogen gas into the fuel cell to determine the flow and volume of the hydrogen gas used and to see the output of the fuel cell in the form of voltage, load voltage and current which will later be known for the efficiency and power of the fuel cell. . This test was carried outby designing a test circuit to regulate hydrogen gas by controlling the use of valves and flow sensors controlled by Arduino Uno by looking at two different conditions, namely condition 1 (maximum hydrogen gas pressure (1.5 bar)) and condition 2 (stable hydrogen gas (1.1 – 1.3 bar)). In this test, the voltage, load voltage, volume, flow and current are recorded. Based on the test results in condition 1, the value of voltage, volume and flow is higher than condition 2 and for load voltage, the more load used, the lower the value, while the more load used, the higher the value. Based on the results of the tests that have been carried out,the calculations were carried out and it was concluded that the power is directly proportional to the load used and the fuel cell has an efficiency of 58-60%. Keywords: Fuel Cell, PEMFC, Hydrogen Gas, pressure condition, voltage
ANALISIS EFISIENSI PENGUNAAN KAPASITOR BANK TERHADAP PERBAIKAN FAKTOR DAYA DAN JATUH TEGANGAN PADA HOTEL GRAND DAFAM YOGYAKARTA Lukman Darmawan; Moch. Dhofir; Tri Nurwati
Jurnal Mahasiswa TEUB Vol. 11 No. 5 (2023)
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This research discusses about analysis of the use of capacitor banks for power factor improvement and voltage drop at Grand Dafam Hotel Yogyakarta. For simulation of analysis, researchers used a software called ETAP, Based on the Analysis, The reactive power required at the Grand Dafam Yogyakarta Hotel to improve the power factor to 0.96 is 478.513 kVAR under maximum loadconditions, while on February 24, 2023 it only requires reactive power of 291.92 kVAR. The use of capacitor banks can reduce voltage losses by 1-3% from before the capacitor bank. because the higher the power factor results in a smaller current so that voltage losses will decrease. The total cost of the Grand Dafam Yogyakarta Hotel electricity bill for 1 month before installing the capacitor bank is estimated at Rp35,710,845,732, while after installing the capacitor bank the electricity bill is Rp26,032,673,052 This is because there is no kVARH penalty that has been set according to PLN rules. Keywords : Capacitor Bank, Power Factor, Voltage Drop, Current, Power Loss, Economic Analysis, ETAP
DISKRITISASI KONTROLER PI PADA PULSE WIDTH MODULATION (PWM) RECTIFIER TIGA FASA Gasa Gradianto; Tri Nurwati; Bambang Siswojo
Jurnal Mahasiswa TEUB Vol. 11 No. 5 (2023)
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Rectifiers are increasingly being used in various applications such as power supplies for microelectronics, household electrical equipment, battery charging, power conversion in high-voltage direct current (HVDC) transmission systems, and so on. Conventional rectifiers typically use diodes, which are uncontrolled rectifiers that have a disadvantage of producing inflexible output voltage since the output voltage cannot be regulated. Therefore, there is a need for controlled rectifiers, namely three-phase PWM rectifiers, which convert AC voltage into DC voltage with higher output voltage than the input voltage, and the output voltage can be adjusted according to specific requirements. This research discusses the comparison of PI controller design in the sdomain and z-domain with pulse width modulation (PWM) three-phase rectifier as the plant to be controlled.
ANALISIS PEMBANGKIT TENAGA LISTRIK MENGGUNAKAN BIOGAS DI PT. KENCANA TIARA GEMILANG Abi Fitrabiandi; Unggul Wibawa; Tri Nurwati
Jurnal Mahasiswa TEUB Vol. 11 No. 5 (2023)
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Renewable energy is one of the energy sources that can meet energy needs. One of the renewable energy sources is biogas. Biogas is the fermentation process of organuk materialto produce methane gas. Biogas can be converted into other energy,one of which is electrical energy. In this research will be conducted an analysis of the potential of biogas in PT. KTG. The biogaswill be converted into electrical energy. The material of making biogas this time is garden waste that will be put in the digester.The waste will decay and produce methane gas in the digester. The gas will be put into the generator as fuel to be converted intoelectricity. In the results of the experiment, the potential of biogas in PT. KTG is enough to run one division. Of the 1m3 biogasproduced can produce electricity of 3.42 kWh. Because the type of garden waste is varied, so the electricity generated has apercentage of 56% match with the literature. The costs incurred during the trial period when using electricity from PLN amountedto Rp. 25,523.03, - and when using electricity converted from biogas was Rp. 8,600.-. Keywords: biogas, electric power, generator
Co-Authors Abi Fitrabiandi Affan Rafli Andriansyah Bagus Ramadhan Bambang Siswojo Dhofir, Mochammad Eka Maulana Erni Yudaningtyas Faisal Shidqi Farhan Afif Hanip Gabriella Yolanda Krisanti Gasa Gradianto Ivan Aditya Chrissanto Joeken King Abednego Judianto Lukman Darmawan Mahfudz Shidiq Moch. Dhofir Muhammad Afdal Muhammad Faqih Alfalah Muhammad Haichal Pambudi n/a Rifyal Rahma Tiana Umaya Ramadhan Setya Novianto Rini Nur Hasanah Rusli, Mochammad Unggul Wibawa Waru Djuriatno