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All Journal Jurnal Mahasiswa TEUB Jurnal EECCIS Jurnal Surya Masyarakat Cendekia: Jurnal Pendidikan dan Pembelajaran Jurnal Sosiohumaniora Kodepena (JSK) Unri Conference Series: Community Engagement
Tri Nurwati
Jurusan Teknik Elektro Fakultas Teknik Universitas Brawijaya
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ANALISIS ARUS BOCOR ISOLATOR PADA JTM DI PLN ULP MOJOSARI DALAM KONDISI KERING DAN BASAH Ramadhan, Muhammad Dicky; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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This research discusses about the leakage current analysis of polluted ceramic disk insulators at PLN ULP Mojosari. So that conditions in the laboratory are the same as in the field, leakage current testing is carried out in dry and wet conditions, with variations in wet conditions using rainfall of 25.49 mm, 45.79 mm, and 96.37 mm to simulate rainfall in Indonesia, according to data from BMKG. In this research, a polluted plate insulator consisting of 2 disk insulators is used according to conditions in the field. The test voltage variations used range from 11 kV to 24 kV. From the test results it was found that pollutants on the insulator and rainfall had an effect on the leakage current value, because from the results of testing the pollutant content it was found that the pollutants present were metal and semiconductor which could reduce the insulating ability of the insulator if theseelements stuck to the surface of the insulator . In XRF testing, pollutant elements that are difficult to dissolve in water were found, namely Ti (Titanium) at 1.29%, V (Vanadium) at 0.04%, Cr (Chrome) at 5.97%, Mn (Manganese) at 7.14 %, Fe (Iron) at 11.2%, and Ni (Nickel) at 7.10%. Meanwhile, in the XRF-H method, the element Ti (Titanium) was 1.8%, V (Vanadium) was 0.30%, Cr (Chrome) was 14.4% and Mn (Manganese) was 36.1%. In testing pollutant insulators with a voltage of 20 kV in dry conditions, the leakage current value was 136.43 µA. Then, in testing wet conditions with artificial rainfall of 25.49 mm, 45.79 mm, and 96.37 mm, leakagecurrent values were obtained at 142 µA, 214.83 µA, and 290.63 µA, respectively. In this research, it was found that the greater the artificial rainfall and the test voltage provided, the greater the value of the leakage current flowing through the pollutant insulator. Leakage current flowing on the surface of polluted insulators will also cause electrical power losses and electrical energy losses. The energy loss values obtained at a test voltage of 20 kV are 23.90 kWh for dry conditions, 24,88 kWh for 25,49 mm rainfall, 37,64 kWh for 45,79 mm rainfall, and 50.92 kWh for dr 96.37 mm rainfall. Keyword: Leakage Current, Disk Insulator, Pollutant, Wet, Dry
PENGARUH PERBESARAN LUAS ELEKTRODA TERHADAP PROBABILITAS TEGANGAN TEMBUS PADA DIELEKTRIK MINYAK MENGGUNAKAN SUMBER TEGANGAN TINGGI DC Astari, Bela Natasya; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 2 (2024)
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The electrode is an electrical conductor that is used to determine a breakdown voltage and functions as a tip medium where the positive and negative sides are opposite. The shapes of electrodes are very diverse, one of which is rod electrodes. This research will describe the effect of increasing the electrode area on the probability of breakdown voltage in oil dielectrics using high DC voltage. The research method used is to collect data through testing breakdown voltage, leakage current and oil conductivity at the High Voltage Laboratory, Department of Electrical Engineering, Faculty of Engineering, Brawijaya University and carrying out electric field simulations for each variation of electrode area magnification with FEMM 4.2 software. The electrode variations used in testing breakdown voltage and leakage current are A, 2A, 3A, 4A, and 5A. Breakdown voltage testing was carried out with the same distance between electrodes, namely 2 mm, on an oil dielectric using Shell Diala B oil. The results obtained from this research were the influence of increasing the electrode area on the probability of breakdown voltage and leakage current level. Where the greater the area magnification value, the smaller the breakdown voltage value and the greater the leakage current level. Apart from that, the five variations of electrode area magnification have the same homogeneity factor where the electric field distribution is even. Keywords: Electrodes, Enlargement, Probability, Shell Diala B Oil
DESAIN DAN SIMULASI PENGENDALI BEBAN ELEKTRONIK UNTUK PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) KALI JARI Bernadine, Muhammad Zaidan; Utomo, Teguh; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
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Pengendali Beban Elektronik atau Electronic Load Controller merupakan perangkat elektronik yang menggunakan komponen semikonduktor, dirancang untuk mengatur beban utama generator agar daya yang dihasilkan oleh generator sesuai dengan kapasitasnya sehingga nilai tegangan dan frekuensi sistem tetap terjaga. Desain dan simulasi dilakukan menggunakan perangkat lunak MATLAB Simulink. Hasil penelitian menunjukkan bahwa desain ELC yang dipilih meliputi tiga bagian, yaitu penyearah tiga fasa gelombang penuh, kontrol, dan beban komplemen. Penyearah tiga fasa gelombang penuh digunakan untuk mengatur arus yang mengalir ke beban komplemen dengan menggunakan komponen MOSFET berjumlah enam untuk mengatasi tiga siklus VRN, VSN, dan VTN. Kontrol ELC menggunakan metode yang mengacu pada teori p-q dan pengendalian modulasi arus (PWM). Beban komplemen digunakan untuk mengalirkan arus sisa yang tidak digunakan oleh beban utama yang pada penelitian inimenggunakan beban resistif 20,6 ohm. Simulasi dilakukan dengan membandingkan sistem jika menggunakan ELC dan tidak pada tiga kondisi, yaitu saat perubahan beban, beban nonlinier, dan beban tidak seimbang. Pada kondisi tidak menggunakan ELC dan dilakukan perubahan beban, semakin kecil beban konsumen yang terhubung generator maka semakin tidak stabil nilai daya, tegangan, dan frekuensi sistem. Namun, dengan penggunaan ELC maka nilai daya, tegangan, dan frekuensi dapat dipertahankan mendekati 1 pu. Pada kondisi beban non-linier, ELC berhasil memperbaiki nilai daya dari 0,52 pu menjadi 1,05 pu, tegangan dari 1,06 pu menjadi 1 pu, dan frekuensi dari 1,56 pu menjadi 1,009 pu. Pada kondisi beban tidak seimbang, ELC berhasil memperbaiki nilai daya dari 0,89 pu menjadi 1,05 pu, tegangan dari 1,06 pu menjadi 1 pu dan frekuensi dari 1,23 pu menjadi 1,009 pu. Kata kunci — Electronic Load Controller, Teori P-Q, Beban Komplemen, Penyearah Tiga Fasa Gelombang Penuh.
PENERAPAN METODE OVERMODULASI UNTUK MENAMBAH JANGKAUAN KECEPATAN PERMANENT MAGNET SYNCHRONOUS MOTOR (PMSM) Amiruddin, M. Fero; Djuriatno, Waru; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
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The Permanent Magnet Synchronous Motor (PMSM) is a type of electric motor frequently used in electric vehicles due to its reliability and efficiency. However, electric vehicles have a maximum speed limit caused by the Back Electromotive Force (BEMF), which prevents further torque generation. The Overmodulation method is chosen to enhance the maximum speed of PMSMs. Byemploying overmodulation, the inverter output voltage will be higher than using ordinary SVPWM. This voltage increase allows the current to flow for a longer duration, generating torque and thus extending the speed range of the PMSM. This study utilized the PLECS software for simulation. The results revealed a 13.7% increase in RMS voltage, a 40.7% increase in current, higher power output, a 1.08% increase in speed range, and a 1007% increase in electrical torque. Overmodulation enhances voltage, current, power, and speed range without altering the components. Keywords: SVPWM, Overmodulation, BEMF, Motor Speed, PLECS
ANALISIS EFISIENSI TRANSFORMATOR DISTRIBUSI DI PT. SADHANA Pratama, Muhammad Arkan Restu; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
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Currently, electrical energy is one of the main needs in everyday life, so the quality of electrical energy that reaches consumers’ needs to be considered. This is related to the efficiency of the distribution transformer. The analysis methods that can be used to determine the efficiency of the distribution transformer are the transformer loading percentage analysis method, load imbalance analysis, transformer total loss analysis, and transformer efficiency analysis. In this study, the authors collected current data and total power data on 2 distribution transformers at PT Sadhana, Indonesia. The result of this study is that the highest totaltransformer loss value occurs in transformer 1 with a value of 9,62 kW and a load current of 1704,29 A. While the lowest total loss value occurs in transformer 2 with a value of 5,74 kW and a load current of 1151,43 A. The highest transformer efficiency occurs in transformer 2 which is 99,23% with a transformer load percentage of 39,89%. While the lowest transformer efficiency occurs in transformer 1 with a value of 99,12% and a transformer load percentage of 59,14%. From all the analysis results, it is known that the load current is directly proportional to the total loss of the transformer, and the transformer efficiency is at its nominal value when the transformer loading is in the range of 40%-80%. Keywords: Distributing Transformer, Percentage of Loading, Load Imbalance, Transformer Total Losses, Transformer Efficiency.
PERANCANGAN GATE DRIVER MOSFET SiC DENGAN TEGANGAN PENGEMUDIAN NEGATIF UNTUK MEREDAM CROSSTALK Putri, Intan Anggraeni Maryanda; Djuriatno, Waru; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
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The rapid development of SiC MOSFET technology is due to its advantages over Si MOSFETs. In half-bridge configurations, SiC MOSFETs can cause EMI, ringing, and crosstalk from fast switching, requiring gate drivers to mitigate these issues. Conventional gate drivers (CGD) have limitations. This study assesses the negative voltage transistor-based assist gate driver (NVTAGD) in a half-bridge topology for its effectiveness in reducing crosstalk. NVTAGD reduces voltage overshoot by 21.02 dB and suppresses positive and negative crosstalk by 9.59 dB and 12.19 dB, respectively. Results show no shoot-through and no need for anadditional negative power supply. Although NVTAGD has a higher rise time, it enhances MOSFET reliability by effectively anaging crosstalk without extra control signals. Index Terms— MOSFET SiC, active gate driver, crosstalk, shoot-through, half bridge configuration
PENGARUH PERBESARAN JUMLAH ELEKTRODA TERHADAP TEGANGAN TEMBUS PADA DIELEKTRIK UDARA MENGGUNAKAN SUMBER TEGANGAN TINGGI AC Satria, Muchamad Iqbal; Dhofir, Moch.; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 3 (2024)
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Based on the law of enlargement, the probability value of breakdown voltage in conductor insulation is influenced by changesin the size or number of conductor arrangements. This change affects the insulation application standards that will be appliedto high voltage equipment. This research describes the effect of increasing the number of electrodes on the probability ofbreakdown voltage in air dielectrics using high voltage AC. The research method used is to collect data through testingbreakdown voltage and leakage current at the High Voltage and Applications Laboratory of Brawijaya University, as well assimulating electric field distribution with FEMM 4.2 software. Variations in the electrode arrangement of the rods used are1 pair, 2 pairs, 3 pairs, 4 pairs, and 5 pairs. Breakdown voltage testing was carried out using the Up and Down method in40 trials and analyzed based on the Normal Distribution graph (Gaussian). The results obtained from this research are theinfluence of increasing the number of electrode arrays on the breakdown voltage probability value, where the greater thevalue of increasing the number of electrodes, the greater the breakdown voltage probability value at the same voltage. Thevalue of the leakage current between the electrode arrays increases as the number of arrays applied increases. This causesthe air resistance value between the electrode arrays to decrease as the amount applied increases. Keywords: Breakdown voltage; Leakage current; Probability; Enlargement law; Electric field
ANALISIS RANCANGAN OPERASI SISTEM PEMBANGKIT LISTRIK TENAGA HYBRID (PLTS – PLTB) ENERGI TERBARUKAN PADA GEDUNG BERSAMA TEKNIK ELEKTRO UNIVERSITAS BRAWIJAYA Hidayat, n/a; Nurwati, Tri; Wibawa, Unggul
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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The increasing need for energy sources is not commensurate with the limited nature of fossil energy, so a transition to renewable energy is needed. However, the availability of renewable energy for electricity generation is still limited and expensive. To overcome this, a combination or hybrid of several power plants is needed. Hybrid operation has long been known as a solution to increase the amount of power generation from renewable energy plants. The aim of this research was to determine the results of designing a hybrid system (PLTSPLTB) using hybrid design software and analyzing it from technical and economic aspects. The method used is in the form of calculations on technical and economic aspects through parameters in the form of average hourlyload, solar radiation, wind speed as well as component specification and price data. Based on the results of operating system design using hybrid design software, it was found that the results of optimizing solar panels with a capacity of 2.75 kW, 1 wind turbine, 4 kW inverter, and connected to the PLN grid produce electrical energy of 11,910 kWh/year and renewable penetration of 41.5%. When installing a hybrid system (PLTS-PLTB), the energy purchased to the PLN network is 6,968 kWh and the energy sold to the network is 1,235 kWh for one year. From a technical aspect, it requires 10 solar panels with 5 solar panels installed in series and 2 solar panels installed parallel, the highest average solar panel output power occurred in September at 13.52332 kW and the lowest average output power occurred in February at 9.89158 kW. The highest average output power of wind turbines occurred in September at 196.583 W or 0.197 kW and the lowest average output power occurred in March at 15.625 W or 0.0156 kW. From the economic aspect, the results show a Net Present Cost (NPC) of IDR 252,264,302.01, Total Annualized Cost (TAC) of IDR 14,981,718.67, Cost of Energy (COE) of IDR 1,268.45 per kWh. Keywords: Hybrid operation, Calculation, Solar radiation, Wind speed.
PERFORMANCE COMPARISON OF DOUBLE-SWITCH CUK CONVERTER AND CUK CONVERTER Akbar, Alif Aulia; Hasanah, Rini Nur; Nurwati, Tri
Jurnal Mahasiswa TEUB Vol. 12 No. 4 (2024)
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The conversion of high voltage with continuous input and output is a crucial requirement for current applications such as electric vehicles and renewable energy. In this research, a converter is proposed based on the Cuk converter by modifying the components into two switches, three inductors, three diodes, and four capacitors. The duty cycle and pulse signals on both switches are the same. The circuit analysis process is carried out using the continuous conduction mode method, assuming eachcomponent is in an ideal state. The analysis is conducted in two modes: when the switch is on and when the switch is off. Simulation and circuit analysis are shown to convert an input voltage of 12 volts to 156 volts on the output side. Simulations are conducted to analyze the input voltage, input current, output voltage, output current, voltage on the capacitor, current on the inductor, and then compare the changes in duty cycle to the output voltage, changes in duty cycle to efficiency, changes in duty cycle to the voltage stress on the switch and diode, and voltage stress on the switch relative to voltage gain. The results of these comparisons indicate that this converter can provide higher efficiency and a wider voltage gain capability with lower voltage stress value. Keywords: Cuk Converter, Efficiency, Simulation, Voltage Stress
RANCANG BANGUN SISTEM MONITORING PERKEBUNAN VERTIKAL TANAMAN BAYAM BRAZIL DENGAN SUMBER TENAGA LISTRIK DARI PANEL SURYA Widyantoro, Salsa; Nurwati, Tri; Abidin, Zainul
Jurnal Mahasiswa TEUB Vol. 12 No. 5 (2024)
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Indonesia is a country with a large population and is ranked 4th in the world. However, the population in Indonesia is not evenly distributed and is mostly concentrated on the island of Java. This has a big impact on the agricultural sector, namely the reduction in agricultural land. Mitigation and adaptation ef orts are very important in dealing with this phenomenon, such as ef icient management of water resources, diversification of crops that are more drought resistant, and implementation of innovative agricultural technology. An innovative solution to overcome quality and quantity in the agricultural sector is to implement a vertical farming system. The application of vertical farming does not use soil as a planting medium and provides nutrients, but uses water flowed by a pump. Vertical Farming uses LED lights as additional light to support plant photosynthesis at night. However, using LED lights and pumps in a vertical farming system will require quite a lot of electricity. So it is necessary to addsolar panels to meet electricity needs. In this research, solar panels are connected to a battery to store electrical power. This vertical farming system prototype has been realised and is working well. Test results show that this system can be applied much better and more widely. Keywords— LED, Vertical Farming, solar panel
Co-Authors Abdillah, Moch Naufal Achmad, Baihaqi Akbar, Alif Aulia Alfarizy, Muhammad Mahdiy Amiruddin, M. Fero Astari, Bela Natasya Badriyah, Intan Layla Bambang Siswoyo Bashir Mosaddegh Basrowi Basrowi, Basrowi Bernadine, Muhammad Zaidan E. Wakama, Tamunonengi Fatahillah, Muhammad Firdausi, Aditya Mahardika Ganendra, Risang Ghifari, Ahmad Goegoes Dwi Nusantoro Gradianto, Gasa Gumintang, Adnan Hafidh, Muhammad Yusril Hasanah , Rini Nur Hayyan, Muhammad Rafif Hidayat, n/a Hikam, Aldi Lutfil I Nyoman Wahyu Satiawan Inayati, Dian Megantara, Septian Fajar Moch. Dhofir Mochammad Roviq Mochammad Rusli, Mochammad Muhammad Aziz Muslim Muhammad Kurniawan Nanang Sulistiyanto Nisa, Rizqa Ulya Fakhrun Pramudya, Lembat Aji Prasetyo, Achmad Ari Dwi Prastiawan, Hilmi Arif Pratama, Muhammad Arkan Restu Purba, Yobel Yehezkiel Putri, Intan Anggraeni Maryanda Putu Hadi Setyarini Ramadhan, Muhammad Dicky Ramadhan, Muhammad Indrata Rasyid, Athallah Rini Nur Hasanah Rizal, Mohammad Iqbal Fakhrur Saragih, Jhosua Capricorn Satria, Muchamad Iqbal Sinaga, Andreas Sober Sisca Fajriani Sitompul, Ezra Ananda Soltana Guesmi Tarigan, Faldano Bastian Teguh Utomo Thuhu, Dias Satriyo Unggul Wibawa Waru Djuriatno Widyantoro, Salsa Wijono Wijono Zainul Abidin