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All Journal Jurnal Pengabdian Magister Pendidikan IPA Dielektrika : Jurnal Ilmiah Kajian Teori dan Aplikasi Teknik Elektro Jurnal Abdi Insani ABIDUMASY : Jurnal Pengabdian kepada Masyarakat Profitabilitas Behavioral Accounting Journal Management of Information System Journal
Supriyatna
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Dynamic and Stability Assessment of an Automatic Voltage Regulator Based on Time- and Frequency-Domain Analysis Wiryajati, I Ketut; Supriyatna
DIELEKTRIKA Vol 13 No 1` (2026): DIELEKTRKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dielektrika.v13i1`.446

Abstract

This study presents a dynamic and stability analysis of an Automatic Voltage Regulator (AVR) system for a synchronous generator using time-domain and frequency-domain approaches. The system is modelled as a series of first-order linear subsystems consisting of an amplifier, exciter, generator, and feedback sensor, resulting in a fourth-order closed-loop system. Numerical simulations are conducted to compare the performance of the AVR without a controller and with a PID controller. Time-domain analysis indicates that the uncontrolled system exhibits a rise time of 0.339 s, an overshoot of 57.937%, and a damping ratio of approximately 0.17, indicating a heavily underdamped response. After implementing the PID controller, the rise time decreases to 0.295 s and the overshoot is significantly reduced to 14.368%, with the damping ratio increasing to approximately 0.53. Frequency-domain analysis using Bode diagrams shows an improvement in phase margin from less than 20° to more than 40°, and gain margin from below 6 dB to above 10 dB. The dominant pole shifts from approximately Re(s) ≈ −0.2 to Re(s) ≈ −1.0 in the complex plane, confirming enhanced relative stability and faster transient decay. Overall, the results demonstrate that the PID controller significantly improves stability, response speed, and damping performance, making it suitable for voltage regulation in power system applications
Pelatihan Pemanfaatan Limbah Pertanian Untuk Meningkatkan Kesadaran Masyarakat Dalam Pengolahan Limbah Pertanian Menjadi Biomassa Di Desa Batu Mekar Kecamatan Lingsar Harjian, Muhammad Rivaldi; Adnyani, Ida Ayu Sri; Supriyatna; Natsir, abdul; Perdana, I Ketut; Tawaqqal, Akbar
Jurnal Pengabdian Magister Pendidikan IPA Vol 9 No 2 (2026): April-Juni 2026
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v9i2.15210

Abstract

Agricultural waste such as rice straw and wood waste has great potential to be utilized as an environmentally friendly biomass energy source. However, the community in Batu Rimba Hamlet, Batu Mekar Village, Lingsar District, still tends to openly burn this waste, causing environmental pollution and not providing optimal economic value. This community service activity aims to increase community understanding, awareness, and interest in processing agricultural waste into biomass fuel. The implementation method is carried out through the stages of problem identification, socialization, training, direct practice of biomass production, and activity evaluation using a questionnaire for 20 training participants. The materials provided include biomass potential, the impact of open burning, and techniques for processing wood waste and straw into alternative fuels such as biomass briquettes. The results of the activity showed that the training program successfully increased community capacity with an average level of understanding of 83.25%, awareness of 84.50%, and interest and readiness of 84.75%. Overall, the average evaluation score reached 84.17%, which is included in the high category. In addition to improving community knowledge and skills, this activity also fosters awareness of the importance of sustainable agricultural waste management and has the potential to open up renewable energy-based business opportunities at the local level. Therefore, training on utilizing wood and straw waste as biomass can be an educational and practical solution to support more valuable and environmentally friendly agricultural waste management. Keywords: agricultural waste, biomass, briquettes, community training, renewable energy.
Co-Authors Agung Budi Muljono Agustina, Rachma Bagus Widhi Dharma S Dian Ardiansyah Fitri Julianti Harjian, Muhammad Rivaldi Humairoh Saidah I Ketut Wiryajati I Made Ginarsa Ida Ayu Sri Adnyani Latif , Abdul Natsir, Abdul Niasari, Fitri Perdana, I Ketut Putra, I Ketut Perdana R. Reski Eka Putra Ramdhani, Zainul Hadi rosihan adi wijaya Seniari, Ni Made Siti Marlina, Siti sultan Supriyatna, Ahmad Surtika Ayumida Surtika Ayumida Tawaqqal, Akbar urif sukma, lalu deni