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PENYULUHAN PEMANFAATAN CATU DAYA LISTRIK MANDIRI DI DESA GILI GEDE INDAH KABUPATEN LOMBOK BARAT Ida Bagus Fery Citarsa; I Nyoman Wahyu Satiawan; Supriono; Cipta Ramadhani
Jurnal Abdi Insani Vol 7 No 1 (2020): Jurnal Abdi Insani Universitas Mataram
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v7i1.299

Salah satu daerah di Kabupaten Lombok Barat yang belum teraliri listrik dari PLN adalah Pulau Gili Gede. Masyarakat di sana masih menghadapi beberapa kendala dalam penyediaan kebutuhan primer, seperti ketersediaan air bersih, keterbatasan tenaga listrik dan masalah telekomunikasi. Saat ini untuk ketersediaan kebutuhan tenaga listrik dipenuhi dengan mengandalkan genset dengan kapasitas sangat terbatas yang dibiayai dari iuran warga. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengatasi persoalan yang dihadapi oleh masyarakat di Desa Gili Gede Indah, berkaitan dengan masalah ketersediaan tenaga listrik, diusulkan pembuatan suatu catu daya listrik mandiri. Hal ini dilakukan dengan metode penyuluhan mengenai prinsip kerja dan penggunaan catu daya listrik mandiri kepada masyarakat di Desa Gili Gede Indah. Pada waktu yang telah disepakati, tim pelaksana yang beranggotakan staf pengajar Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram telah melaksanakan kegiatan pengabdian kepada masyarakat di Desa Gili Gede Indah dengan memberikan penyuluhan cara penggunaan sekaligus serah terima catu daya mandiri bertenaga batere sehingga mitra pelaksana dapat memahami prinsip kerja dan cara penggunaan kedua macam peralatan tersebut di atas dengan baik. Dengan menggunakan catu daya mandiri bertenaga batere ini dapat menunjang kegiatan masyarakat yang membutuhkan layanan tenaga listrik sehingga dapat meningkatkan kinerja dan produktivitas mereka.

Improved Modulation Methods of the Dual-inverter Fed Open-end Winding Three-phase Motor Drives with Equal DC-link Voltage Satiawan, I Nyoman Wahyu; Ida Bagus Fery Citarsa; Warindi; I Ketut Wiryajati; Supriono; Ni Made Seniari; I Made Budi Suksmadana
International Journal of Electrical, Energy and Power System Engineering Vol. 5 No. 3 (2022): The International Journal of Electrical, Energy and Power System Engineering (I
Publisher : Electrical Engineering Department, Faculty of Engineering, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ijeepse.5.3.93-98

This paper investigates PWM method for the dual-inverter fed open end winding three-phase induction motor drives. This is aimed to improve the quality of the output voltage as well as to enhance the motor performance by solving the drawback of the PWM method. The proposed PWM method operates two inverters in different technique, i.e one inverter operates in square wave mode (slow switching) and one inverter in PWM mode (fast switching). Although the PWM method can improve the quality of the inverter output voltage over the two-level inverter output, the proposed PWM method causes an excessive ripple in both torque and stator current especially at the transient period. The drawback is solved by applying a new switching strategy that manage the inverter switches operate in turn between slow switching and fast switching in one circle of operation. The proposed method is verified via simulation. The result shows that the quality of output voltages improves for all modulation indices in comparison with two-level inverter. Furthermore, torque ripple is reduced, and current ripple are improved as the current waveform is enhanced to be more symmetrical.

Metoda Kombinasi Modulasi Pergeseran Tingkat Lebar Pulsa dengan Variabel Frekuensi Pembawa Pada Inverter Model Jembatan: Combination Method Of Level Shift Pulse Width Modulation With Carrier Frequency Variables On A Bridge Model Inverter Wiryajati, I Ketut; I Nyoman Wahyu Satiawan; Ida Bagus Fery Citarsa; I Made Budi Suksmadana; Supriono
Journal of Computer Science and Informatics Engineering (J-Cosine) Vol 8 No 1 (2024): Juni 2024
Publisher : Informatics Engineering Dept., Faculty of Engineering, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jcosine.v8i1.595

Switching is very important in energy conversion systems. The conversion process requires a good and reliable method. This research identifies methods or techniques for pulse width modulation. This technique proposes a new model of modulation technique, namely by combining level shifted modulation techniques, and adjusting the frequency in such a way that it produces a signal that suits the inverter's needs. The inverter tested in this research is an inverter with a bridge model configuration. The proposed research and methods were verified using MATLAB and Simulink software. The results obtained are the ratio of total harmonic distortion (THD) are 25.07%, 76, 66% and 9.183%, respectively

PENINGKATAN KETERAMPILAN INSTALASI PERANGKAT KERAS KOMPUTER SEBAGAI SARANA PENINGKATAN KOMPETENSI SISWA SMK MAGANG I Ketut Wiryajati; I Nyoman Wahyu Satiawan; Ida Bagus Fery Citarsa; Made Budi Suksmadana; Supriono; I Ketut Perdana Putra; Ida Ayu Sri Adnyani
Jurnal Pepadu Vol 5 No 3 (2024): Jurnal PEPADU
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/pepadu.v5i3.5969

In the rapidly developing digital era, technical skills in information and communication technology are very important for Vocational High School (SMK) students, especially those who are doing internships. Mastery of computer hardware, such as installation and maintenance, is a vital skill to compete in the world of work. Intensive training in computer hardware installation during internships aims to improve the competence of vocational high school students, making them better prepared to face industry demands.The training methods used include planning based on needs analysis, orientation, balanced implementation between theory and practice, and continuous evaluation. This training succeeded in improving students' practical and theoretical skills, with 85% of participants being able to complete installation tasks well. In addition, the average student score in the theory exam increased from 60% to 85%. As many as 80% of participants obtained competency certificates, which increased their competitiveness in the job market.In conclusion, this training is effective in improving the technical competence of vocational high school students in computer hardware installation, making them better prepared to enter the world of work.

Quadratic Polynomial-Based APSD PWM Technique for Dual Three-Phase Inverters Wiryajati, I Ketut; Wahyu Satiawan; I Made Budi Suksmadana; Ida Bagus Fery Citarsa; Supriono
Journal of Electrical Engineering Vol. 1 No. 4 (2025): January
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jte.v1i4.3957

Three-phase inverters are widely used in industrial applications, including motor drives, renewable energy systems, and electric vehicles. One significant issue in these systems is harmonic distortion, which lowers power efficiency and degrades output voltage quality. To address this, the study proposes a quadratic polynomial fitting technique to optimize Pulse Width Modulation (PWM) signals, aiming to reduce harmonics and improve power quality. This research focuses on a dual three-phase inverter configuration, which provides better current distribution, reduced power losses, and increased resilience to electrical disturbances. The use of quadratic polynomial fitting allows for more precise PWM waveform generation, resulting in lower Total Harmonic Distortion (THDi). The methodology involves mathematical modeling, simulation using MATLAB/Simulink, and experimental validation with a prototype inverter. Results indicate that the technique significantly reduces THDi, especially at optimal modulation indices. Additionally, implementing an LC filter further improves harmonic suppression, producing a cleaner and more stable output. This approach enhances power conversion performance and is highly suitable for industrial and renewable energy applications where efficiency and power quality are critical

PENINGKATAN KETERAMPILAN INSTALASI PERANGKAT KERAS KOMPUTER SEBAGAI SARANA PENINGKATAN KOMPETENSI SISWA SMK MAGANG I Ketut Wiryajati; I Nyoman Wahyu Satiawan; Ida Bagus Fery Citarsa; Made Budi Suksmadana; Supriono; I Ketut Perdana Putra; Ida Ayu Sri Adnyani
Jurnal Pepadu Vol 5 No 3 (2024): Jurnal PEPADU
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/pepadu.v5i3.5969

In the rapidly developing digital era, technical skills in information and communication technology are very important for Vocational High School (SMK) students, especially those who are doing internships. Mastery of computer hardware, such as installation and maintenance, is a vital skill to compete in the world of work. Intensive training in computer hardware installation during internships aims to improve the competence of vocational high school students, making them better prepared to face industry demands.The training methods used include planning based on needs analysis, orientation, balanced implementation between theory and practice, and continuous evaluation. This training succeeded in improving students' practical and theoretical skills, with 85% of participants being able to complete installation tasks well. In addition, the average student score in the theory exam increased from 60% to 85%. As many as 80% of participants obtained competency certificates, which increased their competitiveness in the job market.In conclusion, this training is effective in improving the technical competence of vocational high school students in computer hardware installation, making them better prepared to enter the world of work.

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