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All Journal International Journal of Electrical and Computer Engineering Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik INTEK: Jurnal Penelitian Jurnal Teknologi Elekterika
Thaha, Sarma
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering

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Network reconfiguration for improving performance system in ULP Sungguminasa considering nonlinear loads Faraby, Muhira Dzar; Rahman, Yuli Asmi; Sofyan, Sofyan; Thaha, Sarma; Lukman, Musfirah Putri; Amaliah, Asma; Mustika, Mustika; Sirad, Mochammad Apriyadi Hadi; Sonita, Anisya
International Journal of Electrical and Computer Engineering (IJECE) Vol 14, No 6: December 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v14i6.pp6066-6075

Abstract

Network reconfiguration is a very economical technique that can improve electrical system performance. The development of semiconductor electrical equipment technology to meet human needs and work, known as nonlinear loads, has had a negative impact in the form of the spread of harmonic distortion which can accelerate the aging process and even damage equipment. In this paper, the effect of the optimization results of network reconfiguration techniques on the Sungguminasa 165-bus Executive Unit Service or Unit Layanan Pelanggan (ULP) electrical system is contaminated with harmonic distortion due to the use of nonlinear loads. This technique was optimized using the particle swarm optimization (PSO) method with a multi objective function in the form of minimizing %THDv and total losses with several limitations. Simulation results from the optimization process of several study cases are shown by activating the five tie switches from the network reconfiguration process on the Sungguminasa 165-bus ULP system which is able to improve power quality by reducing the average %THDv by 3.89% and total losses by 8.19%.
Analisis Sistem Koordinasi Proteksi Over Current Relay (Ocr) Dan Ground Fault Relay (Gfr) Tegangan 20 Kv Bay Trafo Pada Gardu Induk Sanga-Sanga Kalimantan Timur Thaha, Sarma; Indrawan, Andi Wawan; Pongkiding, Yosua Januarius
Jurnal Teknologi Elekterika Vol. 19 No. 2 (2022): Nopember
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v6i2.3527

Abstract

As a provider of electricity services, PLN is required to provide service and supply of electricity with good quality, continuity, improvement and efficiency. Disturbances in distribution systems are short circuit faults between phases or ground phase faults. To protect properly, proper coordination of relay settings is required. Among the equipment in the protection system used in distribution lines are overcurrent relays (OCR) and ground fault relays (GFR). In this study, an analysis of the OCR and GFR settings will be carried out on a 20 kV cubicle at the Sanga-Sanga Substation, East Kalimantan, with the help of the DigSILENT Power Factory 15.1.7 application with a disturbance simulation at 10% and 90% of the feeder length. Based on the analysis results, it is obtained that the short circuit results of 3 phases, 2 phases, and 1 phase to the ground have a value that is not much different from the calculation, while the OCR setting for the outgoing relay is 0.8 A on the secondary side. TMS is 0.083 seconds while the relay is on the incoming side of 20 kV 1 A and TMS of 0.198 seconds. The GFR setting for the outgoing relay is 0.06 A on the secondary side, and TMS is 0.1 seconds, and the relay on the incoming side is 20 kV 0.015 A and TMS is 0.26 seconds).
Implementasi Over Load Shedding (OLS) Pada Interbus Transformator (IBT) #3 31.5 Mva Dan IBT #5 31.5 MVA Di GI Tello 150/66 kV Untuk Menjaga Keandalan Suplai Ke GI Borongloe, GI Daya Dan GI Mandai Thaha, Sarma; Adiyanti, Annisya; Usman, Usman; Sultan, Ahmad Rizal
Jurnal Teknologi Elekterika Vol. 19 No. 1 (2022): Mei
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v6i1.3660

Abstract

Interbus transformer (IBT) is transformer that transfer power in different voltage level. Tello Substation has two IBT that change voltage level from 150 kV to 66 kV.  In order to maintain the reliability operation of Tello substation, both IBT must be not allowed to overload. Overload condition could occur if one of the transformers is fault, the normal transformer will be overload.  If an overload condition occurs, the two IBTs may not operate simultaneously. Due to this condition, it is necessary to prevent the occurrence of overload condition by applying overload shedding (OLS). This OLS application can prevent overload on the transformer if one of the transformers out of service due to fault condition. The OLS relay will work when the load on the IBT has reached its setting, by releasing the load on the 66 kV system line according to the OLS scheme as a precautionary step before all transformers trip. This research uses a case study on the Makassar Subsystem, which is one of the Sulbagsel System's electrical systems. The results showed that the amount of load that needed to be removed when implementing the OLS scheme at IBT #3 and IBT #5 31.5 MVA GI Tello was 16.86 MW. The OLS and OCR schemes are coordinated with the OLS setting current at each IBT GI Tello is 302.5 A, while the setting current for OCR at each IBT GI Tello is 330 and  time multiple setting ( tms) is 1.96
Perancangan Alat Ukur Portable Datalogger Pembangkit Listrik Tenaga Surya A Noor, Nirwan; Sultan, Ahmad Rizal; Thaha, Sarma; Riyadi, Kazman; Lukman, Musfirah Putri
Jurnal Teknologi Elekterika Vol. 20 No. 1 (2023)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v20i1.4241

Abstract

Information about the output power of solar panels and the intensity of solar radiation is needed in the PLTS system to determine the characteristics of the potential power generated by the panels and estimate the amount of load attached. The purpose of this study was to design and manufacture a portable parameter measuring instrument and datalogger module on a microcontroller-based solar panel. Arduino Uno and ThingSpeak WebServer where with this measuring instrument solar panel parameters such as input parameters in the form of solar radiation, ambient (environment) temperature and output parameters in the form of voltage, current, latitude panel position will be measured, stored and displayed in graphical form in realtime. The system being built consists of three main parts: namely the sensor as input which will measure solar radiation data, temperature or temperature, current, voltage, latitude and longitude position of the Arduino Uno solar panel module which will acquire measurement data from sensors and the Labview application which will store and display data in realtime. The results of this study indicate that the measured current error is 1.68% and the lux error is 1.95%.
Design and Construction of a Controlled Temperature Food Product Dryer Based on a Programmable Logic Controller (PLC) Naim, Kurniawati; Thaha, Sarma; Ichwal, Muhammad Noor; Akbar, Muhammad; Iman, Muhammad Taufik
Jurnal Teknologi Elekterika Vol. 21 No. 1 (2024)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v21i1.4802

Abstract

Drying food products using traditional methods relying on sunlight takes a relatively long time, especially with unpredictable weather conditions. Essentially, artificial drying using heat-based equipment provides several advantages, including: independence from weather conditions, adjustable drying capacity, controlled temperature, no need for extensive space, controlled drying conditions, and guaranteed and uniform drying quality. Therefore, this design aims to create a food drying apparatus with PLC control. PLC is used as the controller for this drying apparatus, allowing automatic drying of certain types of food. In this design, we connect a DC motor to rotate the drying cylinder with a PLC device by creating a ladder diagram and determining the inputs and outputs in the CX-Programmer application. The design utilizes three inputs and two outputs. It is important that the I/O is readable by the PLC so that the system operates according to the programmed instructions.
Rancang Bangun Sistem Proteksi Undervoltage dan Overvoltage pada Instalasi Bangunan Sederhana Berbasis Internet of Things Hidayat, Ananda; Sofyan, Sofyan; Thaha, Sarma
Prosiding Sains Nasional dan Teknologi Vol 11, No 1 (2021): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 11 2021
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/psnst.v1i1.4937

Abstract

Sistem proteksi listrik sangat dibutuhkan untuk menjaga keamanan suatu sistem kelistrikan. Pada instalasi bangunan sederhana hanya terdapat sebuah MCB (Miniatur Circuit Breaker) yang berfungsi sebagai proteksi ketika terjadi arus lebih dan hubung singkat pada instalasi listrik. Sehingga tidak dapat melindungi ketika terjadi gangguan undervoltage atau overvoltage yang dapat merusak perangkat rumah tangga yang digunakan. Tujuan penelitiaan ini ialah untuk merancang sistem proteksi tegangan berbasis Internet of Things yang dapat melindungi perangkat rumah tangga dari gangguan tegangan dengan toleransi undervoltage sebesar -10% dan overvoltage sebesar +5% dari tegangan standar 230 volt dan dapat juga memonitor secara online atau offline. Cara kerja sistem yaitu dengan pembacaan sumber tegangan oleh sensor PZEM-004T lalu dilakukan pengolahan data oleh mikrokontroler ESP32 dengan mengaktifkan alarm sebagai penanda ketika tegangan mendekati -2.5% dari batas toleransi tegangan dan relay memutuskan aliran arus jika tegangan melewati batas toleransi yang telah diatur. Pada saat pengujian sistem proteksi sudah bekerja sesuai dengan prinsip kerja dimana alarm aktif pada saat tegangan melewati dari 212.74 Volt sampai 235.74 Volt dan relay trip ketika tegangan melewati dari 207 Volt sampai 241.5 Volt dengan persentase error pembacaan nilai tegangan sebesar 0,84% dan jeda pengiriman data ke web server tergantung dari pengaturan jeda dan jaringan internet.
Assessment of wind power plant performance using turbine performance and power curves: a case study of PLTB TOLO I Jeneponto Sofyan, Sofyan; Idris, Ahmad Rosyid; Latif, Muh. Ardiansyah; Thaha, Sarma; Asri, Andarini; Thahir, Muhammad; Sidehabi, Sitti Wetenriajeng
Jurnal Teknologi Elekterika Vol. 21 No. 2 (2024)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v21i2.5116

Abstract

Jeneponto Regency in South Sulawesi possesses significant wind potential, making it an ideal location for the development of Wind Power Plants (WPP). However, these WPPs are intermittent due to the inconsistent nature of wind energy, presenting challenges that affect the performance and efficiency of turbines in generating electricity. Therefore, this study aims to evaluate the performance of the SWT-3.6-130 wind turbines at the Tolo 1 WPP in Jeneponto to determine their capability in converting wind energy into electrical energy at specific wind speeds. The evaluation results indicate that the performance of the SWT-3.6-130 wind turbines at the Tolo WPP in February 2022 was not optimal. The maximum output power generated by these turbines approached the maximum capacity of 3.6 MW, with Turbine 06 producing 3.57 MW at a wind speed of 13.07 m/s, Turbine 09 producing 3.57 MW at a wind speed of 12.27 m/s, and Turbine 013 producing 3.58 MW at a wind speed of 12.11 m/s. Although the power generated was close to the maximum capacity, the performance variation among turbines indicates the need for further evaluation to address factors reducing efficiency. Power coefficient analysis shows that Turbine T13 exhibited the best performance, with the fewest instances of power coefficient values not meeting standards. This study provides crucial insights for improving performance and preventing failures at the Tolo WPP in the future.
ASSESSMENT OF CURRENT TRANSFORMER USING HEALTHY INDEX AT ULTG PANAKKUKAN Rizqan, Uais; Thaha, Sarma
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

Current transformers (CTs) play a crucial role in the measurement and protection of electrical networks, directly impacting the performance and stability of the distribution system. Over time, the condition of current transformers can degrade due to factors like age, environmental conditions, and overloads. To ensure the health status of these transformers, an assessment method using the Healthy Index (HI) is applied. This research utilizes data from tests on tan delta, insulation resistance, ratio, thermography, excitation, and the age of the current transformer. The data is categorized into two factors: the Conditional Assessment Factor (CAF), which provides a real-time condition overview from tan delta data (where values above 1% indicate poor and values below or equal to 1% indicate good condition), insulation resistance (where values below or equal to 1 Mega Ohm/1kV indicate poor and above 1 Mega Ohm/1kV indicate good), thermography (where temperatures above 4°C are considered poor, temperatures between 1°C and 3°C are medium, and normal temperatures relative to ambient conditions are good), and ratio; and the Performance Assessment Factor (PAF), which assesses equipment performance based on transformer age. Age classifications are 20-35 years as poor, 16-20 years as medium, and below 16 years as good. Following the gathering of CAF and PAF data, a systematic calculation of each factor's weighting is conducted using the Assessment Healthy Index (AHI) Calculation method, resulting in assessment ratings of 1 for poor, 6 for medium, and 9 for good. From these categories, conclusions can be drawn regarding the next steps for the current transformer, determining whether repair or replacement with a new transformer is necessary.
Estimate Equivalent Circuit Internal Resistance Battery LiFePO4 Farid, Andi Fahrul; Itasari, Maya; Asri, Andarini; Thaha, Sarma; Nurfadhilah, Annisa; Ridhwan , Muhammad
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

This research investigates the internal resistance and capacitance characteristics of Lithium Iron Phosphate (LiFePO4) batteries utilizing an equivalent circuit model based on resistor-capacitor (RC) networks. The growing integration of batteries in diverse applications, including electric vehicles and renewable energy systems, necessitates robust battery health monitoring strategies. This work employs current and voltage data acquired during battery discharge, subsequently analyzed using MATLAB 2023b software to determine the pertinent RC parameters. A third-order Equivalent Circuit Model (ECM) of RC, comprising three RC pairs, is implemented to enhance the precision of parameter estimation. The results demonstrate a strong correlation between the number of RC pairs and the accuracy of dynamic battery response representation. A higher-order model generally yields more precise estimations of battery performance. However, increasing model complexity can lead to overfitting, potentially diminishing the model's ability to accurately reflect actual battery behavior. This study contributes significantly to the understanding of LiFePO4 battery internal characteristic modeling and underscores the importance of balancing model fidelity with computational complexity.
Desain Sistem Pembangkit Lisrik Tenaga Surya Pada Tambak Udang sebagai Penggerak Aerator Idris, Ahmad Rosyid; Thaha, Sarma
INTEK: Jurnal Penelitian Vol 6 No 1 (2019): April 2019
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (750.509 KB) | DOI: 10.31963/intek.v6i1.1012

Abstract

Indonesia is a tropical region with very large solarenergy where an average daily insulation of 4.5 - 4.8 KWh / m² /day. Based on this fact, solar energy is a potential form ofrenewable energy to be developed. This study aims to design aPLTS system which is the initial stage of planning PLTS systemdevelopment. This system Design uses Matlab software byutilizing the Matrix Unit Interface (GUI) Matlab to calculatethe amount of electrical load to be used, battery capacityrequirements, number of solar modules and large capacity ofthe inverter to be used. Location of the measurement datacollection takes place in the city of Pinrang, area of the Suppasub-district shrimp farm. Measurements are conducted todetermine how much solar radiation and air temperature in thepond area.
Co-Authors A Noor, Nirwan Adiyanti, Annisya Ahamad Rizal Sultan Ahmad Rosyid Amaliah, Asma Andi Wawan Indrawan asri, andarini Farid, Andi Fahrul Hidayat, Ananda Ichwal, Muhammad Noor Iman, Muhammad Taufik Latif, Muh. Ardiansyah Lukman, Musfirah Putri Maya Itasari Muhammad Akbar Muhammad Thahir Muhira Dzar Faraby, Muhira Dzar Mustika Mustika Naim, Kurniawati Nurfadhilah, Annisa Ridhwan , Muhammad Riyadi, Kazman Rizqan, Uais Sirad, Mochammad Apriyadi Hadi Sitti Wetenriajeng Sidehabi sofyan sofyan Sofyan Sofyan Sonita, Anisya Usman Usman Yuli Asmi Rahman