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All Journal Buletin Udayana Mengabdi Jurnal SPEKTRUM TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Jurnal Ilmiah Kursor International Journal of Engineering and Emerging Technology Informatika Jurnal Teknik Industri Terintegrasi (JUTIN) Jurnal Riset Sistem Informasi dan Teknologi Informasi (JURSISTEKNI) Journal of Artificial Intelligence and Digital Business Majalah Ilmiah Teknologi Elektro Jurnal SPEKTRUM
Lie Jasa
Electrical Engineering Department, Udayana University
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Library & Information Science Mechanical Engineering Other

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Speed Control Strategy for Three Phase Induction Machine Fed Inverter Base on Carrier Base Pulse Width Modulation (CBPWM) I Ketut Wiryajati; A.D Giriantari; Lie Jasa; I N. S. Kumara
International Journal of Engineering and Emerging Technology Vol 5 No 1 (2020): January - June
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJEET.2020.v05.i01.p05

Abstract

Abstract— An induction motors (IM) in many industries is used because it has several advantages, such as a very simple and strong construction, the price is relatively cheap, has good efficiency, power factor is quite good, and maintenance is easier. Besides the advantages of induction motors also have disadvantages, one disadvantage of induction motors is not being able to maintain a constant speed when there is a change in load. If the load changes, the speed of the induction motor will decrease. One method of regulating the speed of an induction motor presented in this study is the regulation of an induction motor using a carrier based PWM (CBPWM) inverter with the field oriented control (FOC) technique. The estimation of rotor rotation, torque and flux is done by carrier- based PWM technique which is given input voltage and stator current. To achieve the desired flux and torque, estimation is used as feedback in the control system. In this study, it will be simulated the induction motor speed regulation with a carrier base-based inverter using Matlab. The results obtained through simulation show the length of time to reach the reference speed for speeds of 1500 rpm and 1450 rpm is around 0.45 seconds. And THD average 2,675%.
PENGARUH VARIASI JUMLAH SUDU TERHADAP EFISIENSI PADA PROTOTYPE PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) DENGAN MENGGUNAKAN TURBIN VORTEX Kadek Rekha Agustha; Lie Jasa; I Made Suartika
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.774 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i03.p4

Abstract

Micro-hydro power plants using vortex turbines have the advantage that their operation can be carried out at low levels of falling water or head. One of the problems that exist in vortex turbine is there is no equation to determine the maximum output generated by the number of blades used. Based on the problems described, a prototype of micro-hydro power plants using vortex was made to test the variations in the number of blades to get the best efficiency. The prototype test in this study used a turbine with various number of blades of 3, 5, and 9 blades. Based on the research conducted, the increase of micro-hydro power plant prototype performance equals to number of blades used. When the system was set with a discharge of 4.5 liters per second paired with a turbine consisted of 9 blades which produced 303.8 rpm of turbine rotation before coupled by the generator and 230.5 rpm after coupled by the generator, the generator rotation was 653.5 rpm, the generator output voltage was 8.29 Volts, generator current output was 0.046, generator power output was 0.387 Watt, torque was 0.0393 Nm, and the highest efficiency was 2.92%
ANALISIS DAYA OUTPUT GENERATOR BERDASARKAN VARIASI DEBIT AIR PADA PROTOTYPE PLTMH DENGAN TURBIN VORTEX I Gusti Ngurah Agastya Citranath; Lie Jasa; I Made Suartika
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.842 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i03.p5

Abstract

Vortex turbine is a reaction water turbine that can utilize energy from low headed waterway. The power output of generator on microhydro power plant will differ depend on the input parameters used, such as water flow rates. Hence, this research goal is to find out the power output of generator from various water flow rates with an artificial waterway on a vortex turbine within the microhydro power plant prototype. This research consist a free variable of water flow rates of 2,5 l/s, 3,5 l/s, and 4,5 l/s using 9 blades turbine and paralel load lamps. From the experiment, raises of water flow rate is proportional to the increase of generator’s power output. The power output generated by each water flow rates used are 0,085 W at 2,5 l/s water flow rate, 0,256 at 3,5 l/s, and 0,387 at 4,5 l/s. Based on the experiment, it can be concluded that the increase of input water flow rate is equal to the increase of the power output generated by the generator. It is caused by the rotation of the turbine will be adjusted by the water flow rate used.
RANCANG BANGUN PROTOTYPE TURBIN VORTEX UNTUK PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) Gede Pudja Dianda Mayapada; Lie Jasa; I Made Suartika
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.028 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i03.p6

Abstract

MHPP is a run of river hydroelectric power plant type, that does not require a large dam or water discharge, but rather diverts the flow rate of water into a channel. Vortex turbine utilizes whirlpool of water obtained from the spiral basin shape to push the turbine to rotate. The reason of this research was to decide the design of the MHPP prototype using a vortex turbine. This prototype is a miniature or laboratory scale. This research is designed to model the MHPP prototype using a Vortex turbine which is helpful for learning before it is implemented directly to the river. In this study, the prototype MHPP with vortex turbine was designed with a 0.3 m head, 1.5 dim input pipe, 4.5 L/s water flow, basin with an upper diameter of 40 cm, 40 cm height and 12 cm outlet and 41° cone angle. The runner blade design has 9 blades with a runner outer diameter of 15 cm, 5 cm neck diameter, and 5 cm runner width. This prototype is able to generate power of 0.387 Watt and has an efficiency of 2.93%.
RANCANG BANGUN SISTEM MONITORING KANDANG KELINCI BERBASIS INTERNET OF THINGS Alif Rizqian Aki; Lie Jasa; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 10 No 3 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i03.p15

Abstract

These days technology has developed rapidly, almost covering all aspects in humas life for example is automation system. The automation system works without human intervension and complete all works independently. Existing technology can already be connected to each other via the internet network so that it can transmit or receive data automatically. The Internet of Things (IoT) can support automated systems by providing real-time information so that users can monitor the performance of these automated systems. This research was to develop rabbit cage by utilizing microcontroller as monitoring system. The system utilizing Internet of Things (IoT) as monitoring medium between users and devices to help users monitor their rabbit cage remotely. The design installed several sensors such as ultrasonic, temperature, load cell sensors, DS18B20 and water level sensors. This research used Arduino Mega 2560 as main microcontroller and NodeMCU ESP8266 as communication device between the tools and database. The tools use android application on user smartphone that fuctions real time monitoring for the cage. Based on the results of this research by using Arduino Mega as microcontroller board to controlling and monitoring rabbit’s cage has succesfully in monitoring the cage via internet through the NodeMCU ESP8266 intermediary according to the design.
Rancang Bangun Purwarupa Monitoring Arus Bocor Pada Kabel Grounding Trafo Incoming 20 KV di Gardu Induk Nusa Dua Berbasis Internet Of Things Saputra, Dharma Bagus; Pradana, Aditya; Togatorop, Josua Febrian; Jasa, Lie; Hartati, Rukmi Sari
Jurnal Informatika Vol 12, No 3 (2024): INFORMATIKA
Publisher : Fakultas Sains & Teknologi, Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/informatika.v12i3.5998

Abstract

Failure of the grounding isolation on the 20 kV transformer incoming cable, resulting in leakage current. The leakage current on the grounding cable can change periodically, so an accurate and real-time monitoring system is required to protect the power transformer equipment and facilitate responsive handling. Therefore, an Internet of Things-based monitoring device is needed that can detect the magnitude of the leakage current present on the 20 kV secondary side of the transformer using an ESP8266 microcontroller and Arduino UNO R3 as the brain of the monitoring system, which controls and processes data from the input to output components. The SCT-013 current sensor is used to measure the AC current on the transformer incoming 20 kV grounding cable without requiring cable cutting, and the Arduino IDE is used to configure the program on the ESP8266 microcontroller to work according to the desired configuration. The results of the prototype testing using the ESP826 and Arduino UNO R3 microcontrollers and the SCT-013 current sensor have shown that the system can work well and the monitoring has been successfully implemented with real-time current monitoring using the Thinkspeak and Blynk platforms. The testing also proved that the SCT-013 current monitoring device can provide a comparison of the test results and measurements with a Tang Ampere, and the data obtained shows that the real-time SCT-013 current monitoring device is accurate, with an average reading error of less than 3% from the SCT-013 non-linearity specification, with a total reading error percentage of 2.0%. Additionally, the current monitoring device is precise, with the lowest standard deviation value of 0.046.
Rancang Bangun Prototype Micro Hydropower Berkendali Internet of Things pada Instalasi Pembuangan Air Limbah Suwung Wiener Nixon Nababan; Ida Bagus Krishna Putra; Lie Jasa
Jurnal Riset Sistem Informasi dan Teknologi Informasi (JURSISTEKNI) Vol 6 No 3 (2024): JURSISTEKNI (Jurnal Sistem Informasi dan Teknologi Informasi)
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/jursistekni.v6i3.370

Abstract

Kebutuhan energi listrik yang terus meningkat di Indonesia berbanding terbalik dengan ketersediaan energi fosil yang semakin menipis, sehingga mendorong pengembangan energi terbarukan. Salah satu potensi energi terbarukan yang dapat dimanfaatkan di Bali adalah Pembangkit Listrik Tenaga Mikrohidro (PLTMH), yang memanfaatkan aliran air sebagai sumber energi. Penelitian ini bertujuan untuk merancang dan mengembangkan prototipe PLTMH berbasis Internet of Things (IoT) di Instalasi Pengolahan Air Limbah (IPAL) Suwung, Bali. IPAL Suwung memiliki potensi aliran air yang dapat dimanfaatkan untuk pembangkit listrik melalui penerapan teknologi mikrohidro. Dengan menggunakan IoT, kinerja sistem pembangkit ini dapat dipantau secara jarak jauh, sehingga meningkatkan efisiensi dan keandalan operasional. Penelitian ini menggunakan metode pengukuran arus, tegangan, frekuensi, dan daya yang dihasilkan oleh sistem, serta memanfaatkan sensor PZEM-004T dan ESP32 sebagai alat monitoring. Hasil penelitian diharapkan dapat berkontribusi terhadap pencapaian Bali Energi Bersih dan pemenuhan target energi terbarukan di Indonesia, serta memberikan solusi inovatif untuk penggunaan PLTMH yang berkelanjutan di sektor pengelolaan air limbah. Kata kunci: PLTMH, Internet of Things, IPAL Suwung, energi terbarukan, Bali Energi Bersih.
Optimal power control for wind/solar hybrid energy system based on multi-objective particle swarm optimization Putri, Ratna Ika; Ronilaya, Ferdian; Syamsiana, Ika Noer; Amalia, Zakiyah; Jasa, Lie
Bulletin of Electrical Engineering and Informatics Vol 14, No 4: August 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i4.9350

Abstract

The effectiveness of wind and solar energy as electricity generators is significantly impacted by unpredictable and varied environmental circumstances, which affect the output power of the wind-solar hybrid power generation system. So, a control system is required for the optimal power production of hybrid renewable energy systems (HRES). This study delineates optimal power management in wind/solar hybrid energy systems by the application of multi-objective particle swarm optimization (MOPSO) algorithms, inverter controllers, and battery controllers. The MOPSO algorithm enhances power generation by modifying the duty cycle of the direct current (DC)/DC converter based on the output from the wind turbine and photovoltaic (PV) system. The proportional-integral (PI) controller functions as both an inverter and battery controller to ensure the constancy of the DC link voltage and output power. The efficacy of the developed control was evaluated using simulation. A comparison has been conducted between the efficacy of the MOPSO algorithm and the perturb and observe (PO) approach. The simulation findings indicate that the MOPSO algorithm surpasses the PO method for performance and output power. The output power produced by HRES with the MOPSO algorithm exceeds that of the PO approach. Optimal power control utilizing MOPSO can yield optimal power despite fluctuations in wind and solar intensity.
Rancang Bangun Sistem Informasi Berbasis Web untuk Mengevaluasi Indeks Keandalan Loss of Load Probability (LOLP) Pembangkit Listrik Naradhiya, Gede; Jasa, Lie; Wiharta, Dewa Made
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 8 No. 4 (2025): October
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v8i4.50619

Abstract

Electrical energy is a vital need that continues to increase every year, thus the reliability of its supply needs to be monitored so that electricity distribution is in accordance with the established standards. The calculation of the reliability of power plants in supplying electricity is called the reliability index. This study aims to evaluate the reliability index of power plants using a web-based information system designed and built by the author. The evaluation of the reliability index was carried out using the LOLP (Loss of Load Probability) method based on the PLN 2016-2025 RUPTL standard. The accuracy of the information system performance was assessed using the MAPE (Mean Absolute Percentage Error) method by comparing the results of the information system calculations to three reference studies. The calculation results showed a MAPE value of the information system of 2.4233%, which is classified as "Excellent" in the MAPE results classification. 
Rancang Bangun Prototype Automatic Transfer Switch dengan Interlock System untuk Peralihan Daya Antara Inverter (PLTS Off-Grid) dan PLN Sianturi, Rednal Josua; Jasa, Lie; Setiawan, I Nyoman
RIGGS: Journal of Artificial Intelligence and Digital Business Vol. 4 No. 4 (2026): November - January
Publisher : Prodi Bisnis Digital Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/riggs.v4i4.3695

Abstract

Ketergantungan terhadap suplai Perusahaan Listrik Negara (PLN) yang sering tidak stabil serta ketidakpastian keluaran Pembangkit Listrik Tenaga Surya (PLTS) Off-Grid akibat kondisi cuaca menimbulkan kebutuhan akan Automatic Transfer Switch (ATS) yang mampu mengatur dua sumber daya secara andal. Namun, ATS konvensional umumnya memiliki jeda perpindahan yang cukup lama sehingga menyebabkan ketidakstabilan tegangan keluaran, dan sering tidak dilengkapi sistem keamanan yang memadai untuk mencegah arus hubung singkat. Penelitian ini bertujuan merancang bangun ATS dengan sistem interlock untuk menghasilkan perpindahan daya yang cepat, aman, dan mampu memprioritaskan PLTS sebagai sumber utama. Sistem dirancang menggunakan dua relay MK2P-I Omron yang dihubungkan dengan prinsip interlock serta dikendalikan oleh Low Voltage Disconnect (LVD). Pendekatan perancangan dilakukan melalui simulasi skematik menggunakan FluidSIM, kemudian dilanjutkan dengan pembuatan prototipe dan pengujian langsung. Pengukuran jeda waktu perpindahan dilakukan menggunakan osiloskop untuk memastikan akurasi kinerja perangkat. Hasil pengujian menunjukkan bahwa perpindahan dari PLTS ke PLN memiliki rata-rata jeda 20 milidetik (rentang 5–40 ms) dengan gangguan redup singkat pada LED, sedangkan perpindahan dari PLN ke PLTS memiliki rata-rata 7,8 milidetik (rentang 4–15 ms) tanpa gangguan visual. Kedua hasil masih berada dalam standar industri ASCO sebesar 30–50 milidetik. Selain itu, sistem interlock bekerja efektif dalam mencegah kedua sumber terhubung bersamaan sehingga risiko arus hubung singkat dapat dihindari. Sistem juga memastikan PLTS tetap menjadi prioritas suplai selama kondisi tegangan memenuhi batas aman.
Co-Authors A. Andriani A.I. Weking Abdul Qodir Achmad Bahri Aditya Pradana, Aditya Aldy Allan Ghozali Alif Rizqian Aki Amalia, Zakiyah Anak Agung Istri Ngurah Marhaeni Anak Agung Ngurah Amrita angga kharisma krishnastana Antonius Ibi Weking Antonius Ibi Weking Ardy Wijaya Ardyono Priyadi Arta Wijaya Daffa Dzaudan Dalimunthe, Ernando Rizki Daniel Kristama Devin Gede Herawan Dewa Ayu Sri Santiari Dewa Made Wiharta donny christiawan Duman Care Khrisne Dwi Suryadewi Efina Marianis Eka Lilla Ananta Elka Pranita Ernando Rizki Dalimunthe G M Arya Sasmita Gabriella Sunsugos Sianturi Gde Brahupadhya Subiksa Gde Dendy Denhero Gede Pudja Dianda Mayapada Gregory Rama Darantiah Ruing H. Daniel Hindro Kusumo Wahid I B GD Siwa Puja Bujawan I Gede Abi Yodita Utama I Gede Agus Darmawan I Gede Ngurah Arya Raditya I Gede Widnyana Putra I Gst Agung Putu Raka Agung I Gst Md Ngurah Bimantara I Gusti Agung Indrawan I Gusti Agung Made Yoga Mahaputra I Gusti Made Bagus Kurniawan I Gusti Ngurah Agastya Citranath I Gusti Ngurah Agung Jaya Sasmita I Gusti Ngurah Saputra I Gusti Ngurah Wira Partha I Gusti Putu Andhita Mahayana I Gusti Putu Mastawan Eka Putra I Kadek Agus Arta Yasa I Kadek Ardika I ketut Gede Darma Putra I Ketut Wiryajati I Made Anand Gopal I Made Ardika Tommy Saputra I Made Suartika I Made Sukarsa I N Satya Kumara I Nyoman Setiawan I Nyoman Wira Mastika I Putu Ardana I Putu Elba Duta Nugraha I Putu Juliana I Putu Wahyu Indra Wedanta I Wayan Arta Wijaya I Wayan Budiarsana Saputra I Wayan Sukerayasa I. K. A. Handayana I. K. A. Sukariawan I.D.N.A. Purnata I.G.N.S. Bramantha P I.K.H. Valentino I.P. Ardana I.P. Kuswara A P Ida Ayu Dwi Giriantari Ida Ayu Sri Sinta Anjani Ida Bagus A. Swamardika Ida Bagus Agung Eka Mandala Putra Ida Bagus Dwiki Dharma Putra Ida Bagus Gede Manuaba Ida Bagus Krishna Putra Irene Trivania IWA Wijaya Jaka Persada Sembiring Joannes Mario Graciano Kapu Kadek Darmaastawan Kadek Rekha Agustha Kapu, Joannes Mario Graciano Khaeril Gusri l Gusti Ngurah Janardana L.G.M. Karisma Linawati Linawati Made Dinda Pradnya Pramita Made Sri Indra Dewi Adnyana Made Sudarma Makmur Fernando Manuaba, Ida Bagus Gede Martin Luhut Ariberthson Sihaloho Mauridhi Hery Mauridhi Hery Purnomo Moch Deny Triatmaja Mohammad Putra Maulidin Nanda Dana Pala Naradhiya, Gede Ngurah Yowana Asta Prawangsa Ni Komang Ayu Sri Anggreni Ni Wayan Lusiani Nia Paramitha Novia Utami Putri Nyoman Putra Sastra P. A. S. Cempaka Pala, Nanda Dana Pedro Paulo De J. Costa Henriques Pranita, Elka Pratolo Rahardjo Putri Agung Permata Sari Putu Althea Putri Wiradani Putu Ardana Putu Arya Mertasana Putu Lanang Bagus Suputra Jaya Amertha Putu Risanti Iswardani Rama Beta Herdian Ratna Ika Putri Ronilaya, Ferdian Rukmi Sari Hartati Rukmi Sari Hartati Saputra, Dharma Bagus Semuel Kete Sarungallo Sianturi, Rednal Josua Surya Pramana Suryadewi, Dwi Syamsiana, Ika Noer Togatorop, Josua Febrian Tom Gerraldo Salomo Situmeang Triatmaja, Moch Deny Veronica Ambassador Flores Wayan Gede Ariastina Wiener Nixon Nababan Y. Lapian Yanu Prapto Sudarmojo Yanu Prapto Sudarmojo Zulfachmi, Zulfachmi