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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal technoscientia Jurnal Informatika dan Teknik Elektro Terapan ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Pengabdian Magister Pendidikan IPA Jurnal Gema Ngabdi Dielektrika : Jurnal Ilmiah Kajian Teori dan Aplikasi Teknik Elektro Jurnal Abdi Insani JURNAL TEKNOLOGI TECHNOSCIENTIA Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Jurnal Energi Baru dan Terbarukan Journal of Renewable Energy, Electrical, and Computer Engineering Jurnal Bakti Nusa Jurnal Karya Pengabdian Teknik Mesin Jurnal Pepadu Jurnal Rekayasa elektrika JEITECH (JOURNAL OF ELECTRICAL ENGINEERING AND INFORMATION TECHNOLOGY) Journal Serambi Engineering (JSE)
Agung Budi Muljono
University Of Mataram
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Hybrid Particle Swarm Optimization–Simulated Annealing OPF for Lombok Generation Cost Reduction HARJIAN, MUHAMMAD RIVALDI; MULJONO, AGUNG BUDI; TAWAQQAL, AKBAR; PUTRA, RAJA RESKI EKA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 13, No 4: Published November 2025
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v13i4.409

Abstract

This study proposes the application of Optimal Power Flow (OPF) in the Lombok Electricity System consisting of 19 buses and 7 generating units, with the main objective of reducing production costs under peak load conditions. The method used is a hybrid optimization method that combines two methods, namely the Particle Swarm Optimization and Simulated Annealing algorithms. Particle Swarm Optimization and Simulated Annealing (PSO–SA) method. Combining PSO and SA algorithms can improve the weaknesses of PSO with its jumping feature. In other words, the use of the PSO-SA algorithm is more effective than the PSO method. The simulation results show a generation cost of USD 31,158. The total generated power is 193,736 MW, which is equivalent to a total load of 193.34 MW. In addition, the voltage profile of all buses is at 0.95–1.05 pu and the power flow of all lines is below the thermal capacity. This finding confirms that the use of the PSO–SA algorithm effectively reduces operating costs without violating the system's operating constraints.
Sosialisasi Pembuatan Briket Arang Jerami sebagai Salah Satu Sumber Energi Berkelanjutan di Laboratorium Listrik Dasar Fakultas Teknik Universitas Mataram Putra, I Ketut Perdana; Wiryajati, I Ketut; Muljono, Agung Budi; Harjian, M Rivaldy; Adnyani, Ida Ayu Sri; Natsir, Abdul; Supriatna
Jurnal Pengabdian Magister Pendidikan IPA Vol 8 No 4 (2025): Oktober-Desember 2025
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v8i4.13086

Abstract

Analisis Perbandingan Daya Keluaran PLTS di PLTM Kokok Putih Berdasarkan Data Intensitas Radiasi Matahari Dari Hasil Pengukuran Dan Global Solar Atlas Sabandi, Rahmat Aprial; Muljono, Agung Budi
Jurnal Energi Baru dan Terbarukan Vol 6, No 1 (2025): Maret 2025
Publisher : Program Studi Magister Energi, Sekolah Pascasarjana, Universitas Diponegoro, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jebt.2025.26122

Abstract

Renewable energy, including solar energy, has become a potential solution to meet the ever-increasing demand for electricity. This study aims to analyze the output power of the Solar Power Plant (PLTS) located at PLTM Kokok Putih, East Lombok, by comparing solar radiation intensity data from direct measurements and the Global Solar Atlas. Measurements were conducted using a lux meter from 09:00 to 15:30, while Global Solar Atlas data covered the entire day. The analysis results show that the average output power from direct measurements is 0.138 kW, while the Global Solar Atlas data yields an average of 0.079 kW, with a difference of 0.059 kW. This discrepancy arises due to differences in time and solar radiation intensity used in the two methods. Moreover, the PLTS location is considered economically viable for operation based on the annual Global Horizontal Irradiation (GHI) value of 1835.8 kWh/m², exceeding the recommended minimum threshold of 1500 kWh/m². This study provides insights into the influence of measurement time and radiation intensity on PLTS output power while affirming the potential of solar energy as a viable electricity source in tropical regions. The research recommends uniform measurement times for more accurate data comparisons.
Analisis Pengaruh Variasi Faktor Daya terhadap Efisiensi dan Regulasi Tegangan Transformator Distribusi Tiga Fasa 240 kVA Menggunakan MATLAB Muljono, Agung Budi; Harjian, Muhammad Rivaldi
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`.449

Abstract

Power factor is one of the key parameters affecting the performance of distribution transformers, particularly in terms of efficiency and voltage regulation. This study aims to analyze the effect of power factor variations on the efficiency and voltage regulation of a 240 kVA three-phase distribution transformer using MATLAB simulation. The power factor was varied from 0.8 lagging to 0.8 leading under the assumption of constant load power, allowing quantitative observation of performance changes. The simulation results show that the maximum efficiency of 98.334% is achieved at unity power factor (cos φ = 1). When the power factor decreases to 0.8, the efficiency drops to 97.927% for both lagging and leading conditions. This efficiency reduction is caused by the increase in load current as the cos φ value decreases, which leads to higher copper losses (I²R). Although the decrease in efficiency is relatively small, its impact can become significant in long-term operation. On the other hand, voltage regulation exhibits different trends under lagging and leading conditions. At 0.8 lagging power factor, the voltage regulation reaches 3.152% and decreases to 1.163% at unity power factor. Under leading conditions, the regulation becomes negative, reaching −1.307% at 0.8 power factor, indicating a voltage rise due to the dominance of the transformer’s reactance component. Overall, operating the transformer at a power factor close to unity provides the most optimal performance in terms of efficiency and voltage stability, and it is essential in planning reactive power compensation in power distribution systems.
Analisis Pengaruh Integrasi Renewable Energy terhadap Profil Tegangan dan Rugi Daya Sistem Tenaga Listrik Menggunakan PowerWorld Simulator Muljono, Agung Budi; I Made Ginarsa; Harjian, Muhammad Rivaldi
Jurnal Serambi Engineering Vol. 11 No. 2 (2026): April 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Integrasi Renewable Energy (RE) pada sistem tenaga listrik memberikan dampak terhadap karakteristik operasi jaringan, khususnya pada profil tegangan dan rugi daya. Meskipun RE mampu meningkatkan efisiensi sistem melalui suplai daya lokal, integrasi yang tidak terkontrol dapat menyebabkan ketidakstabilan tegangan, frekuensi. Penempatan RE pada titik tertentu dalam jaringan dapat memodifikasi pola dan arah aliran daya pada saluran transmisi. Penelitian ini bertujuan untuk menganalisis pengaruh integrasi RE terhadap profil tegangan dan rugi daya sistem tenaga listrik menggunakan PowerWorld Simulator. Sistem dimodelkan berdasarkan sistem uji standar IEEE 6-Bus dengan metode aliran daya Newton–Raphson. Simulasi dilakukan pada beberapa tingkat penetrasi RE yaitu 10%, 20%, 30%, dan 40% dari total beban sistem. Parameter yang dianalisis meliputi tegangan tiap bus serta total rugi daya aktif dan reaktif. Hasil simulasi menunjukkan bahwa integrasi RE meningkatkan tegangan minimum Bus 5 dari 0,9595 pu menjadi 1,0017 pu (mode PV) dan 0,9838 pu (mode PQ) pada penetrasi 120 MW. Rugi daya aktif menurun dari 13,42 MW menjadi 3,07 MW (PV) dan 3,81 MW (PQ), atau berkurang hingga 77,12% dan 71,61%. Namun, penetrasi tinggi menyebabkan tegangan mendekati batas nominal, sehingga diperlukan pengendalian daya reaktif. Secara kuantitatif, integrasi RE meningkatkan efisiensi dan margin kestabilan sistem secara signifikan.
Analisis dan Optimalisasi Pencahayaan Penerangan Jalan Umum pada Jalan Langko Kota Mataram Menggunakan Software DiaLux Harjian, Muhammad Rivaldi; Muljono, Agung Budi; , Akbar Tawaqqal
Jurnal Serambi Engineering Vol. 11 No. 2 (2026): April 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penerangan Jalan Umum (PJU) sarana penting dalam mendukung keselamatan dan kenyamanan pengguna jalan, tantangan mendasar dalam pengelolaan sistem kelistrikan PJU saat ini terletak pada upaya mencapai keseimbangan antara mutu pencahayaan dan efisiensi penggunaan energi. Pada banyak ruas jalan di Kota Mataram masih dijumpai penerapan teknologi PJU yang tidak sesuai standar ditandai oleh tingkat iluminasi dan kemerataan cahaya yang tidak sesuai standar. Penelitian ini bertujuan untuk menganalisis kinerja pencahayaan serta mengoptimalkan sistem PJU pada ruas Jalan Langko, Kota Mataram, berdasarkan standar SNI 7391:2008. Metode yang digunakan adalah pengukuran langsung intensitas pencahayaan (lux) di lapangan serta simulasi menggunakan perangkat lunak DIALux. Hasil pengukuran menunjukkan bahwa sebagian besar titik memiliki tingkat iluminasi yang cukup baik, namun masih terdapat beberapa lokasi dengan distribusi cahaya belum merata. Simulasi dilakukan dengan dua skenario konfigurasi, yaitu susunan lampu berhadapan (kondisi eksisting) dan bersilangan. Hasil analisis menunjukkan bahwa konfigurasi bersilangan menghasilkan distribusi cahaya yang lebih seragam, mengurangi potensi silau, serta meningkatkan kenyamanan visual pengguna jalan tanpa menambah konsumsi energi. Dengan demikian, optimalisasi tata letak PJU berbasis simulasi terbukti efektif dalam meningkatkan kualitas pencahayaan pada infrastruktur jalan di Kota Mataram.
Co-Authors , Akbar Tawaqqal A. Dharma Abdul Nasir, Abdul Abdul Natsir Abdulah Zainuddin Adhevina, Ihda Adi Purna Adi, Haris Setyo Agus Supriyadi Ahmad Riki Baihaki Alfandi, Ahmad Nova Ardhi, Khairunnisa Arifatul Hidayati Arnawan Hasibuan Astianto, Muhammad Helmi Bagus Widhi Dharma S Budiman, Djulfikry Cecep Kusmana Cipta Ramadhani Citra Putri Maharani Desi Widianty Dharma, Ida Bagus Aditya Laksamana Dwinanto Romdhani elan criyanto Esi Birahmatih Fadhillah Umar Rahman Fanani, Rezaldy Faris, M Salman Ginarsa I Made Giri Wahyu Wiriasto Hadi A, Muh. Saihul Haq, Ziaul Harfani Puidi Harjian, M Rivaldy Harjian, Muhammad Rivaldi Hendra Sasmita Hidayatullah, Harsandi Hijaziah, Hijaziah Humairoh Saidah I Ketut Perdana Putra I Ketut Perdana Putra I Ketut Wiryajati I M. Ginarsa I Made Ari Nrartha I Made Ari Nrartha I Made Budi Suksmadana I Made Budi Suksmadana I Made Ginarsa I Made Ginarsa I.Made inarsa Ida Ayu Sri Adnyani Ida Bagus Fery Citarsa Imam Takharruby Indra Sasmita Isniwati, Yuni Jayadi, Lalu Irlan Juliansyah, Wawan Kamil, Muh Rhama Insan Karyawan, I Dewa Made Alit Ketut Perdana Putra, I Lalu Arya Sopansyah Larasati, Alfiyyah Reghin Lesi, Oktaviana Made Sutha Yadnya Mahendra, Aldi Aryanugraha Misbahhuddin, Misbahhuddin Mu'minin, Amirul Much. Dede Pratama Muhamad Tohri Muhammad Nanang Indrajaya Saputra Mukti, Komang Bagus Khrina Nababan, Sabar Natsir, Abdul Ni Made Seniari Niswatun Hasanah Nrartha I Made Nrartha I Made Ari Nur Habiiburrahman Nurhasanah, Rosalia Osea Zebua Osea Zebua Paniran Paniran Paniran Paniran Parhan, Lukman Patriciani , Dede Aulia Poetra, Satrya Bhayangkara prasetyo, Ridho Budi Putra, I Ketut Perdana Putra, R. Reski Eka PUTRA, RAJA RESKI EKA Putri, Rizka Elsa Rahman, Fadhillah Umar Rahmatullah, Fajar Iqbal Fatur Ramadhan, Anur Rangga Akbar Risca Arie Wahyuningsih Rosmaliati, Rosmaliati S. M. Al Sasongko Sabandi, Rahmat Aprial Sandy, Rail Sasongko, Sudi M. Al. Sasongko, Sudi Mariyato Al Sasongko, Sudi Maryanto Al Seftian Aditya Maulana Seniari, Ni Made Sevyanto, Yusril Bagas Sudi Mariyanto Al Sasongko Sudi Mariyanto Al Sasongko Sudi Mariyato Al Sasongko Suksmadana, I Made Budi sultan Sultan ' Sultan . Sultan . Sultan Sultan Sultan Sultan Sultan Sultan Sultan Sultan Sultan Sultan Sultan Sultan Sultan Sultan Sulthon Zamroni Supriatna Supriyatna Supriyatna . Supriyatna Supriyatna Supriyatna Supriyatna Tatik Muliani Tawaqqal, Akbar Tohri, M. Wahyudi, M. Ilham Warindi D Widianty , Desi Wikapti, Ida Ayu Nyoman Iswari Yanuardi Yanuardi Yuristia, Rana Zainuddin, Abdullah Zairina, Zora Zulfikarullah Zulfikarullah Zunistira, Lalu Sirdi Zyad, Ibnu