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All Journal Buletin Udayana Mengabdi Jurnal SPEKTRUM Majalah Ilmiah Teknologi Elektro Jurnal Ilmiah Kursor INTECOMS: Journal of Information Technology and Computer Science Journal of Electrical, Electronics and Informatics International Journal of Engineering and Emerging Technology Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Journal of Law and Social Politics Majalah Ilmiah Teknologi Elektro Majalah Ilmiah Teknologi Elektro

A.A Ngurah Amrita

Department Of Electrical Engineering, Udayana University, Denpasar

Author-ID : 2927275

Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Mechanical Engineering Social Sciences

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Rancang Bangun Sistem Monitoring Listrik Tiga Fasa Berbasis Wireless Sensor Network Menggunakan LoRa Ra-02 SX1278 Aditya Pratama; A. A. Ngurah Amrita; Duman Care Khrisne
Jurnal Teknologi Elektro Vol 20 No 2 (2021): (Juli-Desember) Majalah Ilmiah Teknologi Elektro
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/MITE.2021.v20i02.P20

Electricity monitoring is making to determine the quality of electricity used. Currently, electricity monitoring is still done manually together with it requires a system that can measure the electrical parameters automatically. Therefore, an electrical monitoring system is designed for a three-phase system based on a wireless sensor network (WSN) using LoRa communication. The system consists of a transmitter node as a measured voltage, current, frequency, power factor, and active power using the PZEM-004T module. The receiver node is a gateway that receives data from the transmitter node used LoRa transmission and then forwards the data to be stored in a database using the internet network. The receiver node is equipped with backup data when the node receiver cannot be connected to the internet network. Finally, web monitoring is designed to make it easier for users to access electricity monitoring data online. Web monitoring will display data onto voltage, current, frequency, power factor in a single-phase system and active power in the form of the three-phase system into tables and graphs.

ANALISIS PENYEIMBANGAN BEBAN PADA TRANSFORMATOR DISTRIBUSI MENGGUNAKAN METODE FUZZY I Putu Weda Suryawan; Anak Agung Ngurah Amrita; Widyadi Setiawan
Jurnal Teknologi Elektro Vol 17 No 1 (2018): (Januari - April) Majalah Ilmiah Teknologi Elektro
Publisher : Universitas Udayana

Load Balancing is basically provide the load on the transformer is in accordance with its capacity. Load Balancing is done on a transformer KA 0223 which supported by Bunisari Feeder and powered by the GI Pesanggaran. A transformer is located on Kubu Anyar Street Legian Kuta with the installed capacity of 200 kVA. The Transformer brand used is Starlite. The number of customers in a transformer KA 0223 as much as 173 customers. Measurement of load current is done at peak load that is at night. The data of measurement result then processed using Fuzzy method to get balanced result, the percentage of unbalance of load according to ANSI / IEEE Std 446-1987 is 5% and to know the point of customer that must be added or subtracted. The data used in 2015 are in January and June, 2016 in January and June, in 2017 in January. Measurement results in the year 2017 January 1st semester percentage of load unbalance before using the Fuzzy method of 13.5%. After using the Fuzzy method, the percentage of load unbalance is much better than before at 2.5%. The measurement result of 2015 in 2sd semester is said to be balanced, because the percentage of load unbalance is equal to 5%. After using Fuzzy method, the percentage of load unbalance is much better than before that is equal to 2.2%. This proves that the program can work when the system is either balanced or not.

COORDINATION CONTROLLER POWER SYSTEM IN JAVA-BALI 500 KV INTERCONECTED BASED ON BACTERIA FORAGING - PARTICLE SWARM OPTIMIZATION FOR STABILITY IMPROVEMENT IBG Manuaba; AAN Amrita; Ardyono Priyadi; Hery Purnomo
Jurnal Ilmiah Kursor Vol 8 No 2 (2015)
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28961/kursor.v8i2.65

Power system stabilizer (PSS) and flexible AC transmission system (FACTS) damping controller to improve the stability of the power system has been widely used. A coordinated control method based on the combined computational evolutionary theory is proposed to overcome some of damping controllers simultaneously so as to keep the allowable level of power system damping. It works by making full use of favorable interaction between the controlling and minimizing adverse interactions so that the power system oscillations can be suppressed effectively. Proportional integral derivative (PID) controller tuning based power system stabilizer types PSS3B (PIDPSS3B), static var compensator (SVC) and automatic voltage regulator (AVR) presented in this paper. PID controller gain parameters such as proportional, integral factor, differential coefficient and get AVR selected and optimized by BF-PSOTVAC. The integral time absolut error (ITAE) standards of optimization design as objective function. The results of simulations show that performance index of system the proposed method is 42.7890. The BF-PSOTVAC method has the capability to damping optimally and suppresses error to minimum.

Remote Sensing Systems At The Rocket's Payload Test C.G.I. Partha; I.N. Budiastra; A.A.N. Amrita; I.M. Suartika
Journal of Electrical, Electronics and Informatics Vol 2 No 2 (2018): JEEI (August 2018)
Publisher : Institute for Research and Community Services Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEEI.2018.v02.i02.p05

Aviation technology and space is one of the leading technology for developed countries, especially in the form of rocket technology and payload. Countries that are capable of mastering these technologies will be respected by countries all over the world. Indonesia as the island nation and the State's large and extensive maritime already should have independence in the mastery of the technology of the rocket and payload. Therefore, continuous efforts are required to achieve independence, including through enhancing aviation technology and space technology, particularly at early stages the rocket and payload. Remote Sensing Systems At the rocket's Payload was Test remote monitoring system image capture and the attitude of the launch payload through the computer screen (display) continuously (real-time) data obtained from sensors that are mounted on the rocket's payload. 3D point (x, y, z) must be expressed as a graph visualization perspective drawings of rockets with the appropriate direction. The radar conducted computer GS (Ground Segment) or Ground Control Station (GCS). The result of the attitude of the Rocket Test launch Payloads have been able to do the communication data transmission of images and data for 3D (x, y, and z) in real-time to the Ground segment. Wireless communication uses radio telemetry frequency 433 MHz, power of 100 mW, the distance range obtained in this study a maximum of 1000 meter in conditions in the air and without obstruction.

Study of Transformer Lifetime Due to Loading Process on 20 KV Distribution Line A.A.N. Amrita; W.G. Ariastina; I.B.G. Manuaba
Journal of Electrical, Electronics and Informatics Vol 2 No 2 (2018): JEEI (August 2018)
Publisher : Institute for Research and Community Services Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEEI.2018.v02.i02.p01

Power transformer is very important in electric power system due to its function to raise or lower the voltage according to its designation. On the power side, the power transformer serves to raise voltage to be transmitted to the transmission line. On the transmission side, the power transformer serves to distribute the voltage between the main substations or down to the distribution voltage. On the distribution side, the stresses are channeled to large customers or lowered to serve small and medium customers. As the power transformer is so importance, it is necessary to protect against disturbance, as well as routine and periodic maintenance, so that the power transformer can operate in accordance with the planned time. Some factors that affect the duration of the power transformer is the ambient temperature, transformer oil temperature, and the pattern of load. Load that exceeds the maximum efficiency of the transformer which is 80% of its capacity will cause an increase in transformer oil temperature. Transformer oil, other than as a cooling medium also serves as an insulator. Increasing the temperature of transformer oil will affect its ability as an isolator that is to isolate the parts that are held in the transformer, such as iron core and the coils. If this is prolonged and not handled properly, it will lead to failure / breakdown of insulation resulting in short circuit between parts so that the power transformer will be damaged. PLN data indicates that the power transformer is still burdened exceeding maximum efficiency especially operating in the work area of PLN South Bali Area. The results of this study, on distribution transformers with different loads, in DS 137, DS 263 and DS 363, show that DS 363 transformer with loading above 80% has the shortest residual life time compared to DS 263 and DS 137 which loading less than 80%.

Developing TAMEx Model For Availability Aspect of E-Exam Security in WLAN Environment Gede Sukadarmika; Rukmi Sari Hartati; Linawati .; Nyoman Putra Sastra; A.A.N. Amrita
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.p07

The internet has provided tremendous impact in educational development throughout the world. E-Exam system is one of educational component which has been used increasing dramatically for evaluating educational process. As an e-exam feature, uniformity of system access and time duration of the exam to all examinees is very important to be considered. Exam manager usually utilizes a fixed network to connect all e-exam terminal in order to maintain service stability on e-exam systems. However, the use of a fixed network will be difficult to be implemented if the number of examines is large. There are not many Education institutions have adequate ICT infrastructure or e-exam terminals for all students. Most institutions develop WLAN networks as an alternative to being able to provide ICT services to all students. With the development of mobile device technology (Handphone or Laptop) that strongly supports the learning process through mobile devices. This research aims to develop application of the Time Adaptive for Mobile E-Exam (TAMEx) Model. It serves to maintain the reliability of e-exam implementation on WLAN networks. The possible connection disruptions is anticipate by seeking time compensation only to participants who has experienced the connection problem. The time compensation must be accordance to the duration of the occurrence of connection loss. Application development has been carried out and is functioning properly. The report of application shows that it has succeeded in identifying the connection disturbance duration and provide time compensation to the proper examinee.

IMPLEMENTASI SISTEM PEMANTAUAN SUHU DAN KELEMBABAN UDARA BERBASIS IOT PADA PLANT FACTORY KEBUN PERCOBAAN FAKULTAS PERTANIAN UNIVERSITAS UDAYANA I Nyoman Agus Junaedi; Anak Agung Ngurah Amrita; I Nyoman Setiawan
Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Plant factory is a technological development in agriculture that is able to overcome the decline in productivity in the agricultural sector caused by limited agricultural land. The concept of the plant factory itself is the application of a good environmental condition for plants to grow indoors which is easy to control so that they are not affected by the weather outside. The temperature and humidity in the plant factory must be monitored and controlled in real time with an Internet of Things (IoT) technology that utilizes internet connectivity to connect and transmit data. The system is designed using two microcontrollers, namely Arduino nano which functions as an input reader for temperature and humidity sensors, namely the DHT22 sensor, while ESP32 functions as a module for sending DHT22 sensor data to the Blynk via an internet connection to be stored in the database and can be accessed via the smartphone user. The ESP32 also functions as an automatic control of air humidity and air conditioning (AC) control remotely via a smartphone.

IMPLEMENTASI SISTEM PEMANTAUAN KUALITAS AIR DENGAN IOT DI PLANT FACTORY KEBUN PERCOBAAN FAKULTAS PERTANIAN UNIVERSITAS UDAYANA I Putu A.B. Artha Wiraguna; I Nyoman Setiawan; Anak Agung Ngurah Amrita
Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Plant Factory is a technological concept that forms an ideal environment for plant growth. Water quality has several factors including pH value, water nutrient level (ppm), water temperature and others, plants require a pH value of 5.5 to 6. Differences in pH values and plant nutrients affect plant growth. Lettuce Cultivation has different nutrient requirements for water where plants need around 1000-2000 ppm and 20-25°C in order to produce good growth. Therefore we need a system that can regulate and monitor water quality that can be monitored anywhere. Based on system testing that has been carried out for 30 days, it is found that all components used function as expected, the water quality monitoring sensor is able to detect the value of pH, TDS, water temperature with an average difference with measuring instruments below 2%. After being tested for 30 days from planting to harvesting, the tool can still function properly with indicators that this tool can record data for 30 days and store all data in the database accurately.

IMPLEMENTASI SISTEM PEMANTAUAN INTENSITAS CAHAYA DENGAN IOT DI PLANT FACTORY KEBUN PERCOBAAN FAKULTAS PERTANIAN UNIVERSITAS UDAYAN Aveliano Tandrianto; I Nyoman Setiawan; A. A. Ngurah Amrita
Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Plant factory is a plant warehouse with a closed planting maintenance system which is expected to overcome the problem of pest attack and disturbance of climatic factors. In this study, an IoT-based light intensity monitoring system has been designed at the Plant Factory, Experimental Garden, Faculty of Agriculture, Udayana University. To monitor the value of the LED light intensity. The hardware used in this study uses 2 microcontrollers, namely arduino nano and ESP 32, using a BH1750 sensor to measure the intensity of light lux and using RTC to calculate the time on the device. All hardware components are assembled in parallel and become an IoT system, which is one way to be able to carry out automatic monitoring and control of lights that can be done anywhere. Monitoring with IoT at the plant factory using the internet which can be accessed through the blynk application. With this technology, it is expected to be able to regenerate farmers in the future to farm using IoT technology, the concept of hoeing and plowing, becoming more modern farming.

ANALISIS RELOKASI PEMBANGKIT LISTRIK TENAGA SURYA ON-GRID KAPASITAS 75 kWp DI SMKN 1 DENPASAR Agus, M.N.; Gunawan, J.N.; Amrita, A. A. N.; Hartati, R. S.
Jurnal SPEKTRUM Vol 11 No 2 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

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

The solar energy potential in Bali ranges from 4.01 to 6.13 kWh/m²/day, with an average increase of 4.89 kWh/m²/day. For solutions and innovations in energy development from unlimited resources, the use of new renewable energy such as natural sources like the sun is being explored. The utilization of renewable energy sources in the production of electricity and the decision of the Minister of Energy and Mineral Resources, Ministerial Regulation ESDM No. 49 of 2018, concerns the use of rooftop solar energy systems by consumers of PT PL).. The presence of the PLTS Rooftop at SMKN 1 Denpasar has garnered attention for further analysis regarding the installed PLTS. The performance of the PLTS Rooftop system at SMKN 1 Denpasar is analyzed using PVSyst software to view production potential, then calculate performance parameters of the PLTS system compared to the production results during one year of operation. The relocation design of the rooftop PLTS was carried out using PVSyst software, and then the performance parameters in the new building were calculated. Based on the analysis, the rooftop PLTS at the building before relocation produced an energy output of 124,347 kWh/Year with a performance ratio of 85.6%. For the building after relocation at SMKN 1 Denpasar, the energy output of the PLTS is 133,977 kWh/Year with a performance ratio of 85.7%.

Co-Authors A. Ibi Weking A.I. Weking ADITYA PRATAMA Agus, M.N. Ardyono Priyadi Aveliano Tandrianto Devanka Arya Levin Dharmawan, N. B. Duman Care Khrisne Gede Sukadarmika Gunawan, J.N. Havivi, Hoirur Rosiqin Hery Purnomo I G.N N. Santhiarsa I Gede Dyana Arjana I M.T. Sismantara I Made Mataram I Made Satriawan I N.K. Setiada I Nyoman Agus Junaedi I Nyoman Budiastra I Nyoman Oksa Winanta I Nyoman Setiawan I Putu A.B. Artha Wiraguna I Putu Weda Suryawan I Wayan Shandyasa I Wayan Sukerayasa I.B.G. Manuaba I.G.N. Adi Kurniawan I.M. Suartika I.N.Y. Prayoga I.P.H. Wahyudi IBG Manuaba Ida Bagus A. Swamardika Ida Bagus Gede Manuaba Jonatan Sinurat Komang Oka Saputra l Gusti Ngurah Janardana Lie Jasa Linawati . M.S. Ugustra N. B. Dharmawan N. Nuswantara Novadianto Yudha Irawan Nyoman Putra Sastra Pratolo Rahardjo Priambodo, Saga Putu Vendi Arya Wibawa R. S. Hartati, R. S. Rezky Setyawan Rukmi Sari Hartati S.K. Supriana Salsabila, Unik Hanifah Santiari, Dewa Ayu Sri Sihaloho, Martin Luhut Ariberthson Situmeang, Tom Gerraldo Salomo Suartama, Putu Dandy Surya Puja Anggara Tjok Gede Indra Partha Trivania, Irene Wayan Gede Ariastina Widyadi Setiawan

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