cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Ahmad Rizal Sultan
Contact Email
-
Phone
+62411585367
Journal Mail Official
jurnal-elektrika@poliupg.ac.id
Editorial Address
Jurusan Teknik Elektro Kampus 2 Moncongloe Jl. Tamalanrea Raya (BTP) Makassar 90245
Location
Kota makassar,
Sulawesi selatan
INDONESIA
Jurnal Teknologi Elekterika
Published by Politeknik Negeri Ujung Pandang
ISSN : 14128764     EISSN : 26560143     DOI : http://dx.doi.org/10.31963/elekterika
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering
Jurnal Teknologi Elekterika: Jurnal penelitian PNUP sebagai wadah komunikasi ilmiah antar akademisi, peneliti dan praktisi dalam menyebarluaskan hasil penelitian bidang rumpun elektro dan informatika yaitu teknik listrik, energi, elektronika, kontrol, telekomunikasi, komputer dan jaringan, dan Multimedia.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 16 Documents
 1   2 
Search results for , issue "Vol. 22 No. 1 (2025)" : 16 Documents clear
MEDIUM VOLTAGE INSULATOR CRACK DETECTION USING MOBILENetV2 AND TENSORFLOW Yani, Ahmad; Sofyan, Sofyan; Lukman, Musfirah Putri; Usman, Usman; Junaidi, Apri
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v22i1.5420

Abstract

This study discusses the detection of medium voltage insulator cracks using object detection technology. This study uses medium voltage ceramic insulator image data at the ULP Daya Waste Material Warehouse. Ceramic insulator image data is categorized into good and damaged conditions. Preprocessing involves labeling, dividing train data, validation, and testing, and exporting data to Pascal VOC format. MobileNetV2 is implemented on Google Collab to train the object detection model. The evaluation of the model accuracy is in the COCO matrix, while the performance graph shows that the model can read objects well because the reading curve is in line with the smooth curve. Furthermore, this model is applied in creating an Android application that uses the device's camera to detect objects in real-time. This application processes images, converts from YUV to RGB, and performs object detection using the trained model. The detection results are displayed with bounding boxes and labels on the camera reviewer, namely the good class with a reading value of 1.0, the damaged class with a reading value of 0.67 and the background 1.0. This application also tracks detected objects and updates the display according to the detection results.
ESTIMATION AND MINIMIZATION OF HARMONICS IN IEEE 13 BUS DISTRIBUTION SYSTEM WITH ADJUSTABLE SPEED DRIVE LOADS USING PASSIVE FILTERS Nureni, Nureni; Sofyan, Sofyan; Akhmad, Satriani Said; Naim, Kurniawati; Fitiati, Andi; Sanjaya, Lari Andres
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v22i1.5424

Abstract

Improving power quality in electrical distribution systems is increasingly important with the increasing use of nonlinear loads, such as Adjustable Speed Drive (ASD), which can produce harmonies. This harmonic has the potential to damage equipment, reduce system efficiency, and interfere with power quality. Distribution systems such as IEEE 13 Bus are often used for power quality management analysis. Through simulation, researchers can identify the source and impact of harmonics and evaluate solutions, such as the application of passive filters that absorb or divert harmonic currents, to reduce their negative effects in the distribution system. In this study, two power sources, several transformers, static loads, and nonlinear loads in the form of Adjustable Speed Drive (ASD) were used. The simulation was carried out using Simulink R2019b to model the distribution network, generators, transformers, and loads. The simulation results show that the Adjustable Speed Drive (ASD) load can produce a total harmonic current distortion (THDi) of 24.62% in bus 7, while the total harmonic voltage distortion (THDv) is 0.97%. To minimize harmonic values, passive filters with variations of RL, RC, LC, and RLC are used. The results show that the use of RL passive filters is more effective in reducing THDi and THDv values in bus 7 by 24.47% and 0.97%.
OPTIMIZATION OF SLACK BUS PLACEMENT DURING PEAK LOAD BY CONSIDERING THE VOLTAGE PROFILE OF THE GENERATION BUS IN THE SULSELRABAR ELECTRICITY SYSTEM Hamzah, Muhammad Aqmal Muslimin; Sofyan, Sofyan; Sultan, Ahmad Rizal; Bachtiar , Muhammad Imran
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v22i1.5425

Abstract

This study was carried out to determine the best slack bus placement during peak loads by considering the voltage profile of the generator buses in the South Sulawesi electricity system. Analysis was performed to determine the optimal slack bus placement and its impact on the bus voltage profile. South Sulawesi's electric power system is made up of 29 power-generating units, including PLTA, PLTU, PLTG, PLTGU, PLTMH, PLTD, and PLTB, that operate at a voltage of 150 kV. In addition, 56 substations are linked via a 150 kV transmission network. This study relies on daily operational data from the South Sulawesi system at peak load on September 16, 2022. Using Matlab's Newton-Raphson method to simulate power flow, five scenarios are used to alternately change the generator bus (PV bus) into a slack bus; the generators are PLTA Bakaru, Punagaya PLTU, Jeneponto PLTU, Sengkang PLTU, and Poso PLTA. After running simulations for each generator, it was discovered that Poso PLTA had the voltage profile closest to the standard set by the Minister of Energy and Mineral Resources Regulation number 20 of 2020, which ranges between 0.90 and 1.05 pu. In comparison to the other four slack buses, it had the lowest total power loss of 120,743 MW and 593,764 MW MVAR.
Design and Implementation of Distributed Parallel Architecture for IoT-Based Smart Home Network Traffic Optimization Pakka, Hariani Ma’tang; Azis, Andi Adillah Firstania; Husain, Fadel Muhammad; Putra, Irfan Pratama; Abdurrahman, Tanridio Silviati Delfina; Suyuti, Saidah
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v22i1.5476

Abstract

The increasing implementation of Internet of Things (IoT) in 5G technology and cellular communications faces significant challenges regarding data traffic load and network congestion, particularly in conventional smart home systems. This research proposes and implements a distributed parallel smart home architecture as a solution for optimizing data traffic management and enhancing system reliability. The developed architecture adopts a three-layer structure: a cloud layer as the parent node, a route layer based on ESP8266 as distributed nodes, and a leaf layer consisting of sensors and actuators. Implementation was conducted through a prototype model at the UMI Electrical Engineering Laboratory with comprehensive system performance testing. Results demonstrate a 47% reduction in traffic load compared to conventional centralized systems, achieving 99.7% reliability with a 2.3-second recovery time. The system maintains bandwidth utilization below 60% and demonstrates scaling capability up to 200% without performance degradation. Under normal conditions, the system achieves an average traffic rate of 0.93 Kbits with a 45ms response time, while in emergency mode, it handles peak traffic up to 0.94 Kbits with a 32ms response time. This research contributes significantly to developing more efficient and scalable smart home architectures while providing a framework for implementing parallel distributed systems in broader IoT applications.
Method of Extracting Speech Characteristics of Bugis Regional Language Hartono, Sriwijanaka Yudi; Suyuti, Saidah
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v22i1.5477

Abstract

his research focuses on developing an application to extract speech signal characteristics of Bugis regional speakers using Matlab and Wavesurfer software. The study centers on feature extraction, specifically Short Time Energy (STE), Autocorrelation Cepstral for pitch extraction, and Cepstrum Linear Predictive Coding (LPC) for formant analysis. Results indicate that male voices have greater signal energy than female voices. The pitch values for male speakers range from 52.29 Hz to 135.76 Hz, while female speakers' pitch ranges from 73.39 Hz to 242.42 Hz. The formant analysis showed that male and female speakers have distinct formant frequencies, with male speakers having lower formant frequencies. For instance, the first formant (f1) in male speakers ranges from 433.0 Hz to 590.3 Hz, while in female speakers it ranges from 273.9 Hz to 452.8 Hz. The pitch of male voices is concentrated between 50 Hz and 250 Hz, whereas female voices fall between 120 Hz and 500 Hz. Additionally, differences in formants (f1 to f5) were observed in the word "na'baca," with female speakers generally having higher formant frequencies. This analysis provides valuable insights into the acoustic characteristics of the Bugis regional language. The developed application aims to enhance speech signal processing technologies, supporting applications like speech recognition, linguistic analysis, and voice synthesis, contributing to the preservation of the Bugis language through signal processing techniques.
Analysis of Energy Loss of Distribution Network of PT. PLN (Persero) ULP Banda Aceh Haz, Fauzia; Anshar, Andi Ahmad Fauzan; Setia, Giri Angga; Winanti, Naftalin; Daelami, Ahmad
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v22i1.5483

Abstract

The aim of this research to identify areas requiring further attention to enhance electricity distribution efficiency. Data collection is conducted through observation and documentation methods to obtain secondary data such as Single Line Diagram, Distribution Transformer Load Current, Substation Voltage, Conductor Type, Conductor Length, and Conductor Cross-Sectional Area. Secondary data is processed and analyzed to obtain the conductor resistance value, conductor/line power losses, transformer power losses, total power losses, and total energi losses occurring in the distribution network using mathematical calculations, followed by simulation using the ETAP (Electrical Transient Analysis Program) application. After manually calculating power losses in the PT. PLN (Persero) ULP Banda distribution network at Penyulang Nusantara, which reached 7.84034 kW, the simulation results using the ETAP software show 7.8 kW, with a power loss percentage of 0.69% relative to the load. Following the simulation of improvement efforts using ETAP (conductor uprating and load balancing), power losses decrease to 4.4 kW (a reduction of 3.4 kW), with a percentage of 0.39%. The energi losses before improvement are 5,645.045 kWh (1.802%), and after improvement, it becomes 3,168 kWh (a reduction of 2,477 kWh) with a percentage of 1.59%. The improvement efforts result in savings of IDR 3,578,586.91.
Design Of Decision Support System Final Project Topic In Computer And Network Engineering Study Program State Polytechnic Of Ujung Pandang Tamrin, Fadli; Olivya, Meylanie; Azzahra, Maryam
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v22i1.5484

Abstract

This research is motivated by the difficulties often experienced by students in determining the topic of their final assignment that suits their interests and abilities, which results in delayed graduation. The purpose of this study is to create an accurate final assignment topic decision support system model using the Random Forest Algorithm, design a website-based decision support system to assist students in determining the topic of their final assignment, and evaluate the efficiency and quality of the system. The data used are academic grades and interests of students in the Computer and Network Engineering study program at the Ujung Pandang State Polytechnic. The results of the study show that the Random Forest Model is able to produce final assignment topic recommendations with a Cross-validation accuracy of 61.36%. The website-based decision support system designed can assist students in determining the topic of their final assignment according to their interests and academic abilities, as well as improve the efficiency and quality of the final assignment topic selection process. This research contributes to making it easier for students to find the right final assignment topic, as well as providing guidance for the development of similar recommendation systems in the future.
IDENTIFICATION TYPE OF GAS BASED ON DISCHARGE TIME MEASURING IN LIGHT EMITTING DIODE SERIES Prasetiyo, Bagus; Exaudi, Kemahyanto; Mahjud, Ichsan
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v22i1.5494

Abstract

Nowadays, gas or vapor detection to observe environment situation is very required in many fields. Spectrophotometer method is always used to analyze contain and gas concentrate based on the absorption intensity of light by the gas sample. This research used Light Emitting Diode (LED) series act as a transmitter and light receiver (detector). Above detector surface is layered by a chemical membrane that selective in to the type of gas according the polarization level. This vapor absorption in chemical membrane can cause shrinking the intensity of light that hit the detector. This light will be discarding the load in internal capacitor of the detector. Duration internal sudden discharge of the LED depends on light intensity that hit it. Detector LED series that layered by different chemical membrane is produce different an absorption phase that patterning different discharge time. In this experiment, alcoholic solution and gasoline are used as vapor samples. Identify types of gas using imitation nerve connection method to finding out every type of gas with 80% success.
Design of Microstrip Antenna Array for 5G Communication Systems Mimsyad, Muhammad; Rauf, Awaluddin; Rauf, Yuliana
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

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

Abstract

For the time being, the fifth generation (5G) communication system has been realized in many countries and the number of 5G subscribers is very large. Unlike previous generations that only focused on improving network capacity, the 5G communication systems extends telecommunication services from humans to objects (things), and also from consumers to industries. This enables a wide range of services from conventional mobile broadband to industry 4.0, virtual reality (VR), Internet of Things (IoT), and automatic driving. The values ​​of 5G services and applications greatly support the mobility and flexibility of today's customers such as remote surgery in hospitals, online education, driverless vehicles, unmanned delivery, robots, smart healthcare, industrial automation. This study presents the design and realization of a 4×4 rectangular microstrip antenna array. This antenna can be applied to support 5G communication. The antenna array configuration is arranged uniformly. For antenna excitation, an inset feed transmission line is employed to each antenna element. The antenna array has been validated and works at a frequency of 2.3 GHz, with an HPBW of 30° in the E-plane. Meanwhile, based on measurements, the gain and bandwidth values ​​are 13.51 dBi and 100 MHz respectively.
Analysis of Main Protection Replacement of Bay Line Parepare - Suppa from Distance Relay to Line Current Differential Relay of 150 kv Parepare Substation Fattah, Darmin; Sultan, Ahmad Rizal; Gaffar, Ahmad
Jurnal Teknologi Elekterika Vol. 22 No. 1 (2025)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

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

Abstract

Bay Line Parepare - Suppa uses relay distance as the main safety. With a short transmission line distance, a reliable protection system is needed to overcome disturbances that occur in the system. With the development of time, and also to further improve the main transmission safety, the distance relay as the main protection is replaced with LCD (Line Current Differential) with changes in SPLN T5.002: 2010 to SPLN T5.002: 2021. This study aims to characterize the impedance value, the results of the SIR (Source Impedance Ratio) process and the effect of revenue obtained in replacing the main protection of the Parepare - Suppa bay line from relay distance to LCD (Line Current Differential) relay. Based on the calculation of the impedance seen in the relay distance on the Parepare - Suppa high voltage overhead line, the results are very small (0.1286 - 0.321 ohms). The results of the analysis show that the Source Impedance Ratio (SIR) obtained on the Parepare - Suppa conductor is 4.015 Ohm, while after replacing the relay, the gain or profit obtained is Rp. 1,112,340,880, -

Page 1 of 2 | Total Record : 16

 1   2 

Filter by Year

2025 2025


Reset
Filter By Issues
All Issue Vol. 22 No. 2 (2025): Nopember Vol. 22 No. 1 (2025) Vol. 21 No. 2 (2024) Vol. 21 No. 1 (2024) Vol. 20 No. 2 (2023) Vol. 20 No. 1 (2023) Vol. 19 No. 2 (2022): Nopember Vol. 19 No. 1 (2022): Mei Vol 18, No 2 (2021): Nopember Vol 18, No 1 (2021): Mei Vol 17, No 2 (2020): Nopember Vol 17, No 1 (2020): Mei Vol 16, No 2 (2019): Nopember Vol 16, No 1 (2019): Mei Vol 15, No 2 (2018): Nopember Vol 15, No 1 (2018): Mei Vol 14, No 2 (2017): Nopember Vol 14, No 1 (2017): mei Vol 13, No 2 (2016): Nopember Vol 13, No 1 (2016): Mei Vol 12, No 1 (2015): Edisi Cetak (Januari 2015,Tahun 12, No 1) More Issue