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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) Bulletin of Electrical Engineering and Informatics Angkasa: Jurnal Ilmiah Bidang Teknologi Buletin Ilmiah Sarjana Teknik Elektro KURVATEK Aviation Electronics, Information Technology, Telecommunications, Electricals, Controls (AVITEC) Indonesian Journal of Electrical Engineering and Computer Science SPEKTA (Jurnal Pengabdian Kepada Masyarakat : Teknologi dan Aplikasi) Indonesian Community Journal Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Oni Yuliani
Institut Teknologi Nasional Yogyakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Comparison performance study of singly-fed and doubly-fed induction generators-based bond-graph wind turbines model Kadiman, Sugiarto; Yuliani, Oni
International Journal of Electrical and Computer Engineering (IJECE) Vol 14, No 4: August 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v14i4.pp3592-3606

Abstract

This paper consecrates to a comparative performance study of singly-fed and doubly-fed of induction generators thrusted by wind power turbine of similar generation capacity of 2.5 kW, and constant or variably wind speed. The singly-fed induction generator model could be represented using natural reference frame and doubly-fed induction generator model is described using a Park reference frame. Because of several physical domains existing in both induction generators like mechanical and electrical, modeling of generators is difficult, therefore the modeling based on physical methods takes a high credibility under these conditions. Among the procedures is Bond-graph method that models the systems based on law of mass conservation and/or law of energy conservation containing in the systems. Modeling the parts of both singly-fed and double-fed induction generators are based on Bond-graph method. We found that the impact of stator coil winding for on the current is in the form of changes of its value and steady state intervals; increasing the number of stator coil windings may also lead to increased stator current and the longer their steady state interval. Our study demonstrates also that doubly-fed induction generator possesses advantages compared to singly-fed induction generator, namely better current quality output and an adaptation to fluctuating wind speeds. The performance study is done in constant and variably wind speeds using simulated results of 20-Sim software.
Virtual Laboratory for Power Quality Study Kadiman, Sugiarto; Yuliani, Oni; Yogi Sarwo Wibowo
Retii 2021: Prosiding Seminar Nasional ReTII ke-16
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Makalah ini memperlihatkan laboratorium virtual untuk mempelajari peristiwa kualitas daya, yaitu voltage swell dan voltage sag, harmonik, dan flicker, yang digunakan oleh siswa untuk belajar dan menguji pengetahuan mereka tentang subjek terkait. Laboratorium virtual diperlukan karena dalam kehidupan nyata, dalam ranah kualitas daya, merupakan sesuatu yang rumit untuk menghasilkan peristiwa kualitas daya dalam memahami efek atau menganalisis fitur-fiturnya. Laboratorium virtual dianggap memberikan kesempatan kepada siswa untuk mempelajari terlebih dahulu aspek teoritis dari suatu mata pelajaran, kemudian menerapkan pengetahuan yang mereka kumpulkan ke berbagai bentuk isyarat, untuk mendapatkan karakteristik peristiwa dan pada akhirnya untuk menguji hasil yang mereka capai. dengan karakteristik isyarat tersebut. Terdapat dua manfaat utama pada penggunaan laboratorium virtual: pertama adalah siswa dapat melihat peristiwa yang berbeda, dengan karakteristik yang berbeda dan dengan cara ini, mereka lebih memahami fenomena tersebut; dan yang kedua adalah laboratorium konvensional untuk pembelajaran peristiwa kualitas daya sangatlah mahal, komponen utamanya memiliki biaya yang sangat tinggi.
Rancang Bangun Sistem Remot Inframerah Air Conditioner Berbasis Internet of Things Pratama, Bagus Gilang; Oni Yuliani; Karan Gunawan
Retii 2021: Prosiding Seminar Nasional ReTII ke-16
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

The Internet of Things (IoT) is becoming increasingly popular. IoT has been used to assist people in almost every field in their daily lives. IoT is used in a variety of fields, including agriculture, animal husbandry, automotive, and others, to work more efficiently and improve performance in order to achieve the best results. Researchers used the ESP8266 as an AC controller and Home-Assistant as a web application interface to create an AC remote for monitoring and controlling AC temperature in this study. The AC remote that we created aims to make it easier for room users to control the air conditioner from anywhere, at any time, and with any device as long as they have a browser, such as Firefox or Chrome. The system we developed can adjust the air conditioner's temperature based on the temperature settings specified by the user via the home-assistant web application. Users can adjust the temperature of their air conditioner using their smartphone or a laptop.
TEACHING STATISTIC USING MATLAB Yuliani, Oni
KURVATEK Vol 4 No 2 (2019): November 2019
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v4i2.1193

Abstract

This paper is to describe the use of Matlab as a scientific tool for the teaching of statistics in undergraduateschool. Application of this software in the teaching of some difficult topics like probability concepts, probabilitydistribution, statistical significance, and significance tests, were demonstrated using the Matlab. Matlab has proved it self to be a very effective tool in the educational process because it offers a simple and powerful tool for analyzing and visualizing results of numerical simulations and measurements.
MITIGASI KEGAGALAN INSULATION UDARA DI ZONA RIGHT OF WAY (ROW) PADA KETINGGIAN POHON PARASERIANTHES-FALCATARIA Utama, Budi; Yuliani, Oni; Handayani, Trie
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1719

Abstract

Abstract Total blackouts (on August 04, 2019) in the Special Capital Region of Jakarta have an impact to daily the economy and the cessation of MRT (Mass Rapid Transit) public transportation services, as well as public communication systems. The determination of the value of the voltage gradient for knowing of the black-out was used the method of analyses to the exposure of the electric fields under the Extra High Voltage (EHV) transmission lines 500 kV, at the span of the tower T.434 and T.435 in Malon hamlet, Gunung-Pati village, districts of Gunung-Pati, Semarang city - central Java. The analysis of the electric field exposured has been carried out in a simulation using a Matlab softwere by solving the simultaneous equations model that corresponding to the tower configuration system and how many conductors were used. The results of the simulation showed that there was a failure of air insulation between phase conductors and the trees of Sengon (Paraserianthes-Falcataria) at a value of voltage gradient of 32 448.10 kV / m, 66 861.13 kV / m, and 33 129.75 kV / m, each were for the lateral distance of 10 m, 12 m, and 14 m from the tower axis T.434 and T.435. Keywords: Mitigation, ROW, Paraserianthes-Falcataria, Transmission-lines
Bond Graph Dynamic Modeling of Wind Turbine with Singly-feed Induction Generator Kadiman, Sugiarto; Yuliani, Oni; Suwarti, Diah
Buletin Ilmiah Sarjana Teknik Elektro Vol. 6 No. 4 (2024): December
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/biste.v6i4.9409

Abstract

This paper contributes to a modeling part of singly-fed induction generator (SFIG) systems driven by constant wind turbines of generation capacity of 2.5 kW. As a consequence of some physical domains present in wind turbine, that are aerodynamical, mechanical and electrical, the modeling of wind turbine is challenging; therefore, modeling based on physical techniques has a higher credibility in these conditions. One of these ways is Bond-Graph modeling those representations the systems developed from the law of conservation of mass and energy covering in the systems. Bond graph uses causal analysis which is a process for identifying and addressing the causes and effects of a problem; moreover, the model is presented visually so that they are easier and more user friendly. In this paper, modeling the parts of among blades, tower, gearbox, and induction generator are based on the bond-graph method. The blades are modeled based on aerodynamic force model, both tower and gearbox are modeled based on rigid components model, and generator is model based on hybrid mechanic-electric model. Then, all of parts are connected together to accomplish the entire model of wind turbine for simulation based on 20-Sim software. The proposed wind turbine is the 2.5 KW variable speed with three blades, two-mass gearbox, tower, and a singly-fed induction generator type which is used in small and isolated category power generation systems. The model consists of realistic parameters. Using the Bond-Graph modeling method makes it easier to know what is actually happening in the system, for example the direction of energy movement in the system. Simulation results point out better performance of wind turbine with singly-feed induction generator, namely a more constant output current under constant wind conditions compared to varying wind conditions.
An experimental design of 3 kW variable speed wind turbine with doubly-fed induction generator for standalone applications Kadiman, Sugiarto; Kartikasari, Ratna; Yuliani, Oni
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 2: June 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i2.pp1160-1173

Abstract

Variable speed wind turbines are suitable for isolated populations, island communities or usages in which the charge of electric lines beats the connection and upkeep charge of wind turbine. This research builds wind turbine which working over variable velocity of wind. The proposed construct incorporates three-bladed aerofoil rotor, gear box with ratio 1:8, three-phase doubly-fed induction generator, automatic voltage regulator and tower. Results verify efficacy of this installed structure at wind speed of 7.0-8.2 m/s. The proposed design generates power output at 3 kW, voltage per phase between 220 V, and frequency of 50 Hz; and exhibits noise just around 60-70 dB which is below the permissible noise threshold of 85 dB.
Uji Pasar Produk Eco enzyme Berbasis IoT sebagai Inovasi Pengelolaan Sampah Organik di Rumah Sampah Ringas Trengginas, Bantul, Yogyakarta Pratama, Bagus Gilang; Sari, Sely Novita; Yuliani, Oni; Ramadhani, Nanda; Nawawi, Ilham; Putri, Silfia Dwi
I-Com: Indonesian Community Journal Vol 5 No 3 (2025): I-Com: Indonesian Community Journal (September 2025)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/i-com.v5i3.7687

Abstract

Produk eco enzyme merupakan hasil fermentasi limbah organik yang ramah lingkungan dan multifungsi, seperti untuk pembersih alami, pupuk cair, dan pengusir serangga. Kegiatan pengabdian ini bertujuan untuk mendukung penguatan kapasitas ekonomi masyarakat melalui uji pasar produk eco enzyme berbasis IoT yang dikembangkan oleh Rumah Sampah Ringas Trengginas di Bantul, Yogyakarta. Produk ini dinilai potensial, namun belum memiliki strategi pemasaran berbasis data. Metode pelaksanaan meliputi penyebaran kuesioner, distribusi sampel, wawancara, dan simulasi penjualan terbatas kepada 150 responden dari lima segmen pasar. Hasil menunjukkan respons positif dari konsumen, dengan tingkat ketertarikan tinggi dan potensi pembelian ulang yang signifikan. Temuan ini menjadi dasar penyusunan strategi pemasaran awal yang dapat diterapkan mitra secara mandiri. Hasil pengabdian ini penting sebagai langkah awal dalam memperluas pasar produk berbasis lingkungan dan teknologi, serta mendukung pemberdayaan ekonomi lokal yang berkelanjutan.
Classification Based on Artificial Neural Network for Regency Road Maintenance Priority Pratama, Bagus Gilang; Sari, Sely Novita; Yuliani, Oni
Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Vol 7, No 3 (2025): November (Special Issue)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v7i3.3056

Abstract

The priority classification of road maintenance is an important issue in regional infrastructure management. This study developed a classification model based on Artificial Neural Network (ANN) to determine the priority of district road maintenance automatically based on actual condition data. The data covered 141 road sections, reduced from 15 to 9 main variables using Principal Component Analysis (PCA), and normalized with the Min-Max Scaler. The ANN model consists of 10 input neurons, 30 hidden neurons, and 5 priority class outputs. The data is divided in a 55-15-35 ratio for training, validation, and testing. The model produces 92% accuracy, 91.7% accuracy, 90.4% recall, and 90.9% F1-score. These findings demonstrate the reliability of ANN in multi-class classifications to support more efficient road maintenance decision-making. The novelty lies in the integration of actual field data, multi-criteria classification, and the application of ANN in the context of complex and underexplored district roads in the literature.
Implementasi Smart Greenhouse Berbasis IoT Untuk Budidaya Brokoli Green Magic F1 (Brassica Oleracea Var. Green Magic F1) Media Hortikultura Anwar, Gilang Khairul; Handayani, Trie; Prasojo, Joko; Yuliani, Oni
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 17, No 2 (2025)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v17i2.3115

Abstract

Indonesia merupakan salah satu negara tropis dengan 11% wilayah tropis yang dapat ditanami dan dibudidayakan setiap tahunnya, hal ini memudahkan petani untuk memenuhi kebutuhan pangan masyarakat Indonesia, seperti kebutuhan pangan sayur dan buah-buahan. Kebutuhan pangan tidak dapat terpenuhi sepenuhnya dikarenakan tingginya angka pembangunan perumahan dan gedung bertingkat, hal ini menyebabkan berkurangnya lahan pertanian dengan rata-rata peralihan lahan pertanian menjadi lahan non-pertanian mencapai 100.000 hektar pertahunnya. Penelitian bertujuan untuk memanfaatkan keterbatasan lahan dengan smart greenhouse untuk budidaya brokoli green magic f1 (brassica oleracea var. green magic f1) media hortikultura, prototipe dirancang dengan menggunakan Esp32, DHT22, DS18B20, YL-69, Soil pH, RTC, Water Pump, dan Exhaust Fan. Penelitian dilakukan dengan merancang dan mengembangkan alat prototipe yang terintegrasi internet of things (IoT). Alat prototipe dirancang untuk menyiram tanaman secara real time (jam 07.00 WIB dan 16.00 WIB) atau otomatis (kelembaban 80%-90%) dan menstabilkan suhu greenhouse (18) yang dimonitor dan dikontrol melalui aplikasi Blynk pada ponsel.
Co-Authors Anwar, Gilang Khairul Arif Basuki Bagus Gilang Pratama, Bagus Gilang Budi Utama, Budi Joko Firdaus Joko Prasojo Kadiman, Sugiarto Karan Gunawan Nawawi, Ilham Permana, Irvan Ardhi Putri, Silfia Dwi Qodri, Muhammad Fatih Ramadhani, Nanda Ratna Kartikasari Sely Novita Sari Sugiarto Kadiman Suwarti, Diah Taufik, Tito Tiyastono Trie Handayani, Trie Yogi Sarwo Wibowo Yusuf Ari Bahtiar