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All Journal Jurnal Media Elektro : Journal of Electrical Power, Informatics, Telecommunication, Electronics, Computer and Control System Jurnal Rekayasa elektrika
Wellem F. Galla
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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ANALISA KINERJA PLTS 25 KWP DI GEDUNG LABORATORIUM RISET TERPADU LAHAN KERING KEPULAUAN UNDANA TERHADAP VARIASI BEBAN Sampeallo, Agusthinus S.; Galla, Wellem F.; Mbakurawang, Fredyrick
Jurnal Media Elektro Vol 7, No 1 (2018): APRIL 2018
Publisher : Universitas Nusa Cendana

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Abstract

Sistem pembangkit energi surya laboratorium riset terpadu lahan kering kepulauan Universitas Nusa Cendana (UNDANA) merupakan pembangkit energi surya dengan apasitas 25 kWp yang dimanfaatkan ole laboratorium lahan kering untuk mensuplay energi listrik guna kegiatan praktikum mahasiswa dan perkuliaan lapangan. Sistem pembangkit ini dilengkapi dengan sistem baterai yang akan bekerja apabila sel surya tidak mampu memenui kebutuan beban. Sistem ini dilengkapi juga dengan tiga buah inverter. Namun, pada saat sistem beroperasi, hanya bekerja satu inverter saja, dikarenakan dua inverter yang lainnya mengalami kerusaan. Untuk itu, maka perlu dilakukan analisis terhadap kinerja sistem untuk mengetahui tingkat efesiensi dari pembangkit ini.Dalam penelitian ini akan dilakukan analisis terhadap kinerja sistem dengan melakukan pengukuran-pengukuran terhadap daya output photovoltaic (PV), arus, tegangan inverter, daya inverter, serta efisiensi inverter. Berdasarkan hasil pengukuran diperoleh daya beban maksimal adala 3.401 watt, dengan rata-rata daya yang disuplay dari sistim PV adalah 4.1 kW dan daya output inverter yang diberikan kebeban adalah rat-rata 2.0 kW. Sedangan efisiensi rata-rata inverter dalam mensuplay dari dari PV untuk beban adalah 58.59 %. Hal ini disebabkan karena daya yang disuplay dari sistem PV tidak hanya pada beban lahan kering , tetapi juga mensuplay sistem baterai, sehingga daya dari sistem PV terbagi dua.
REKONFIGURASI JARINGAN PADA SALURAN UDARA TEGANGAN MENENGAH 20 KV PENYULANG NAIONI PT. PLN (PERSERO) ULP KUPANG MENGGUNAKAN PERANGKAT LUNAK ELECTRICAL TRANSIENT ANALYSIS PROGRAM (ETAP) 12.6 Nikolaus M. Tana; Frans Likadja; Wellem F. Galla
Jurnal Media Elektro Vol 8 N0.1 (2019): April 2019
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1390.19 KB) | DOI: 10.35508/jme.v8i1.1441

Abstract

The 20 kV medium Voltage overhead lines of Naioni feeder on PT. PLN (Persero) ULP Kupang system has a feed length of ± 79.825 kms and is the longest of all feeders installed in the ULP Kupang. To minimize the voltage drop and power losses on the Naioni Feeder 20 kV medium Voltage overhead lines (SUTM), network reconfiguration needs to be done including changing the diameter of the conductor, installing a transformer insert and installing a capacitor bank using the help of ETAP software. From the results of the study, before reconfiguration, the voltage drop at the end of the Bus_Trafo KB 082 channel was 0.967 kV and the voltage drop percentage was 4.68% while the total power losses at Naioni Feeder were 20 kV, which were active power losses of 48.062 kW and loss reactive power loss of 25,689 kVAR. Furthermore, after reconfiguring the carrying diameter on the channel that still uses a small diameter of 35 mm2, it will be converted to 70 mm2 on cable 17 that connects the KB 119 Transformer Bus channel to the KB 074 Transformer Bus which is a fairly long distance from all other channels. So that after carrying out the reconfiguration of the conductor diameter, the voltage drop at the end of the Bus Trafo KB 082 channel is 0.844 kV and the voltage drop percentage is 4.24%, while the total power losses in the Naioni Feeder are 20 kV which are active power losses of 41.142 kW and conductor reactive power loss of 25.53 kVAR. Furthermore, after installation of the transformer insert and changing the conductor diameter on cable 17 of 35 mm2 will be changed to 70 mm2 connecting the Transformer Bus Channel KB 119 to the KB 074 Transformer Bus, then the voltage drop at the end of the Bus Trafo KB 082 channel is 0.826 kV and the voltage drop percentage amounting to 4.15% while the total power losses at Naioni Feeder are 20 kV, namely active power losses of39.292 kW and reactive power losses of 24.467 kVAR. And then, if the capacitor bank is installed on the Bus Transformer KB 119 channel bus point to the Bus Trafo KB 074 channel, then the voltage drop at the Bus Trafo KB 082 channel end is 0.891 kV and the voltage drop percentage is 4.47%, while the total power losses are The 20 kV Naioni Feeder is an active power loss of 43.714 kW and a reactive power loss of 22.888 kVAR.
ANALISIS RUGI DAYA DI PENYULANG OEBUFU PT. PLN (PERSERO) ULP KUPANG MENGGUNAKAN ALGORITMA GENETIKA Agusthinus S. Sampeallo; Wellem F. Galla; Dhanang H. L. Rohi
Jurnal Media Elektro Vol 10 No 1 (2021): April 2021
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v0i0.3762

Abstract

The distribution system has a very important role in distributing electrical energy to costumers. Power quality in distribution system can affect the flow of electric distribution. Increase of electrical power demand can affect to power distributing quality like power losses, voltage drop and lower power factor. Load increasing make a reactive current can be up when flow in high resistance conductor as an effect. Installation of capacitor in distribution system is a one of the most efficient method to power losses pressure. This study discusses the optimization of capacitors location and capacity. Genetic algorithm is using as an optimization method. Backward-Forward Sweep Method to be the method of power flow analysis before and after instalation of capacitors to see their effect. Result of genetic algorithm will compare with manual calculation of choosing capacitors to know how effectively of genetic algorithm. This scheme is tested in Feeder Oebufu on 20 kV distribution system under PT. PLN (Persero) ULP Kupang operation. The test divided into 4 case included: before installation, placement of 1 capacitor, 2 capacitors, and 3 capacitors. Best result got in 3 capacitors simulation. Before installastion of capacitor, the power losses is 771,9928 kW, voltage minimum is 0,9842 pu, and power factor is 0,91257. Placement of 3 capacitors on bus 131 127, and 64 decrease a total power losses to be 31,164 kW, in other hand increase voltage profile around bus locations and power factor to be 0,99257.
Perencanaan Kebutuhan Distribusi Sekunder Perumahan RSS Manulai II Evtaleny R. Mauboy; Wellem F. Galla
Jurnal Rekayasa Elektrika Vol 10, No 1 (2012)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (683.142 KB) | DOI: 10.17529/jre.v10i1.145

Abstract

Planning of secondary distribution for residence is important that should consider the load, plan the distribution network, choose the conductor and determine the transformer capacity needed. In this planning, Manulai II Resident is counted as simple household that the transformer is divided into two different areas A and B. Twisted Cable NFA2X size 3x70mm; 3x35mm; 4x25mm; and 2x10mm are used. The research shows that losses and voltage drop are still in tolerance limit and the capacity needed for area A is 50 kVA and 25 kVA for area B.
PERANCANGAN SISTEM PENGISI TOKEN LISTRIK BERUMPAN BALIK PADA kWh METER PRABAYAR BERBASIS ARDUINO Nursalim, Nursalim; Galla, Wellem F.; Syam, Sudirman; Kurniati, Sri; Rondak, Valentino A.E
Jurnal Media Elektro Vol 12 No 2 (2023): Oktober 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v12i2.12694

Abstract

Kilo Watt Hour Meter or kWh meter is a tool for calculating the amount of electrical energy used by electricity consumers, both residential and industrial customers. The electrical energy used is then converted into the electricity price that must be paid each month. Currently, most kWh meters in circulation are smart kWh, which use electricity tokens as transaction calculations. Customers must fill in 20 token numbers via the kWh meter keypad to fill in electricity tokens. Filling in this 20-digit token is not easy, this is because usually, this type of kWh is placed in a higher place to avoid the reach of children. This placement sometimes causes problems with replenishing the token, and users must start over from the beginning. This research aims to create a tool to fill in electricity token numbers that can be controlled using an Android application, making it easier for users to fill in electricity tokens remotely via smartphone. Apart from that, this system has feedback in the form of notifications that display numbers that failed to be filled in on the kWh meter. Test results show that this system can function well from 10 meters without obstructions and 9 meters without obstructions.
A NEW METHOD OF TORQUE RIPPLE MEASUREMENT FOR MAGNETIC GEARS Syam, Sudirman; Kurniati, Sri; Nursalim, Nursalim; Galla, Wellem F.
Jurnal Media Elektro Vol 13 No 1 (2024): April 2024
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v13i1.15120

Abstract

Torque ripple analysis and calculation methods in an axial-type Magnetic Gear (MG) design with four rectangular NdFeB magnetic layers have been reviewed and discussed. Smooth and steadily transmitted torque is an essential characteristic of a magnetic gear. Reducing possible mechanical vibration, position inaccuracy, and acoustic noise is necessary. Therefore, this study aims to design a new engineering method appropriate for calculating the torque ripple of the MG transmission by testing its mechanical and electrical properties. Two simultaneous torque tests compare the MG brakes from zero to full load. In addition, the transmission torque of the axial MG is measured and calculated using technical methods. The results showed that differences in dynamic torque occurred in the MG at various air gap distances.
ANALISIS OPERASIONAL PEMBANGKIT LISTRIK TENAGA SURYA ATAP PADA GEREJA MASEHI INJILI DI TIMOR KAISAREA KOLHUA KUPANG Nahas, Reflianus H.; Likadja, Frans J.; Galla, Wellem F.
Jurnal Media Elektro Vol 14 No 1 (2025): April 2025
Publisher : Universitas Nusa Cendana

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Abstract

On-Grid Rooftop Solar Power Plant (PLTS) is interconnected with the PLN network and has a capacity of 25 kWp at GMIT Kaisarea BTN-Kolhua Kupang, which is expected to reduce significant operational costs. Therefore, this study aims to determine the performance ratio and the amount of energy potential contained in the Rooftop Solar Power Plant (PLTS) at GMIT Kaisarea BTN-Kolhua Kupang in order to optimize the use of renewable energy and reduce electricity operational costs. The research method used is a descriptive method and direct measurement on the inverter, MDP, and LVMDP to measure current and voltage to obtain the output power of the PLTS, PLN, and load. The results of the study indicate that the Rooftop Solar Power Plant (PLTS) system at GMIT Kaisarea BTN-Kolhua Kupang performed well, as evidenced by the efficiency of the Rooftop Solar Power Plant (PLTS), which obtained a maximum value of 85.60% on Monday of 85.60%. The measurement results show that there are savings in power and bills at GMIT Kaisarea BTN-Kolhua Kupang, with savings for 7 consecutive days of (Saturday 19.58 kWh, Sunday 76.84 kWh, Monday 9.45 kWh, Tuesday 24.05 kWh, Wednesday 22.46 kWh, Thursday 23.30 kWh, Friday 32.92 kWh).
ANALISIS EFEKTIVITAS SISTEM PROTEKSI BERBASIS TELEGRAM DALAM MENGATASI GANGGUAN TEGANGAN DAN ARUS LEBIH UNTUK MELINDUNGI PERALATAN LISTRIK TEGANGAN RENDAH Nursalim, Nursalim Nusa; Galla, Wellem F.; Syam, Sudirman
Jurnal Media Elektro Vol 14 No 1 (2025): April 2025
Publisher : Universitas Nusa Cendana

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Abstract

In the digitalization era, protecting electrical equipment in low voltage systems of 380/220 V is crucial to ensure operational reliability and safety. This study explores the effectiveness of a protection and monitoring system based on the Internet of Things (IoT), integrated with the Telegram application, for detecting disturbances such as overvoltage and overcurrent. The methodology employed is a quantitative experimental design, involving system testing with smart sensors and relays. The test results demonstrate that the system successfully provides real-time notifications to users within an average time of 2 seconds after a disturbance is detected. With this system, users can promptly be informed about voltage and current conditions that may potentially damage equipment, thereby allowing for swift actions to prevent damage. In addition to enhancing responsiveness, this system also facilitates remote management of electrical systems. The findings of this research emphasize the importance of implementing modern technology in electrical system protection, which can reduce the risk of damage and improve energy management efficiency.
Co-Authors Agusthinus S. Sampeallo Dhanang H. L. Rohi Evtaleny Rollan Mauboy Frans J. Likadja Likadja, Frans J. Mbakurawang, Fredyrick Nahas, Reflianus H. Nikolaus M. Tana Nursalim Nursalim Nursalim, Nursalim Nusa Rondak, Valentino A.E Sampeallo, Agusthinus S. Sri Kurniati, Sri Syam, Sudirman