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Jurnal Nasional Teknologi Komputer
Published by CV. HAWARI
ISSN : 28087801     EISSN : 28084845     DOI : -
Core Subject : Science,
Computer Science & IT
Jurnal Nasional Teknologi Komputer di bidang ilmu komputer dan teknologi. Jurnal JNASTEK diterbitkan oleh CV. Hawari. Redaksi mengundang peneliti, praktisi, dan mahasiswa untuk menulis perkembangan ilmiah di bidang-bidang yang berkaitan dengan teknologi informasi, teknik informatika dan sistem komputer. Jurnal JNASTEK terbit 4 (Empat) kali dalam setahun pada bulan Januari, April, Juli dan Oktober. Jurnal ini berisi artikel penelitian dan kajian ilmiah.
Arjuna Subject : Ilmu Komputer (semua kategori) - Perangkat Lunak
Articles 277 Documents
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PERANCANGAN WEBSITE MULTIMEDIA SEBAGAI MEDIA PROMOSI DAN INFORMASI DI CABANG UTAMA CV. GAPA AC MOBIL Bagas Alivia Muhammad; Ricky Ramadhan Harahap; Nova Mayasari
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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Abstract

The development of information technology encourages business actors to optimize digital media as a means of communication and promotion. The main branch of CV. Gapa AC Mobil currently does not have an integrated official website, so the delivery of service information and workshop activities is still limited. This research aims to develop a multimedia website that is able to become an information center as well as a digital promotional media for the company. The system development method applied is the Systems Development Life Cycle (SDLC) with the Waterfall model which is carried out in stages starting from needs analysis, system design, database design, implementation, testing, to the maintenance stage. The design includes the development of a responsive and structured interface and the design of a database using MySQL managed through phpMyAdmin to support the management of service data, portfolios, and company information. The implementation of the system is carried out using PHP as the main programming language combined with HTML, CSS, and JavaScript to build an interactive display. The test is carried out using the Black Box Testing method to ensure that each feature runs according to the specifications of the needs. The results of the development show that the resulting website is able to present information in a more organized manner, improve ease of access for customers, and support the company's digital promotion strategy. The existence of this website is expected to strengthen the professional image and increase the competitiveness of CV. Gapa AC Mobil in the face of
Perancangan Sistem Kasir Dan Laporan Keuangan Berbasis Web Pada Toko Andi Elektrik Andi Arianto Limbong; Abdul Khaliq; Barany Fachri
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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Abstract

The development of information technology is encouraging businesses to shift from manual to digital systems to improve the efficiency and accuracy of data management. Tokoh Andi Elektrik, which sells electrical equipment, still records transactions, inventory, and financial reports manually, potentially leading to recording errors, reporting delays, and the risk of data loss. This research aims to design and build a web-based cashier and financial reporting system capable of managing sales transactions, product data, inventory, catalogs, and generating financial reports automatically and in a structured manner. The system development method used is the Waterfall method, which includes requirements analysis, system design, implementation, testing, and maintenance. The system was developed using PHP, MySQL, HTML, CSS, and JavaScript and implemented in a localhost environment. The results show that the system can improve transaction process efficiency, simplify inventory management, and produce faster, more accurate, and more secure financial reports. With this system, it is hoped that Tokoh Andi Elektrik's operational management will be more effective and support optimal business decision-making.
RANCANG BANGUN SISTEM INFORMASI PENGADUAN MASYARAKAT BERBASIS WEB PADA DINAS KOMINFO KABUPATEN LANGKAT Iqbal Hanafi Ilham; Hanna Willa Dhany; Afif Badawi
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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Abstract

The Department of Communication and Informatics (Kominfo) of Langkat Regency plays an important role in receiving and handling public complaints related to public services. Previously, the complaint process was conducted manually through paper forms, short messages, and face-to-face reporting, which caused several problems such as delays in report delivery, difficulties in tracking complaint histories, and lack of transparency for the public. This study aims to design and develop a web-based Public Complaint Information System to improve report management effectiveness and public service quality. This research applies a software engineering approach using the Waterfall development model consisting of problem identification, data collection, requirement analysis, system design, implementation, testing, and evaluation. The system was developed using PHP, HTML, CSS, and JavaScript programming languages with a MySQL database. The main features include online complaint submission, report management by administrators, complaint status monitoring by the public, and automatic report generation. The results show that the developed system facilitates the public in submitting complaints without visiting the government office directly. In addition, the system assists officers in managing complaint data in a structured manner, accelerates complaint handling processes, and increases transparency in public services. Therefore, the web-based public complaint information system can be an effective solution to support faster, more accurate, and efficient services at the Langkat Regency Kominfo Office.
Rancangan Sistem Monitoring Dan Pengaturan Energi Listrik Menggunakan Jaringan Internet Berbasis NODEMCU M. Fiqri Haikal; Hamdani; Beni Satria
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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Abstract

As more and more people use electricity, we need a good way to monitor how much energy is being used in real-time. The goal of this study is to create and implement a system that can monitor how much power is being used in a room. The system will use a NodeMCU microcontroller and a YHDC SCT-013-000 current sensor, and the MQTT protocol will be used to send data. Current sensors measure the electric current in the power source. The NodeMCU then processes this information and sends it via WiFi to the server, where it is displayed on the monitoring application. This study uses hardware design, software design, and system testing methodologies to assess the performance and accuracy of the sensors used. When the device is turned off, the YHDC SCT-013-000 current sensor can read the electric current with a difference of 0.03 Amper. When the device is turned on, it can detect a current with a difference of 0.17 Amperes compared to a clamp multimeter. The system also connects to a WiFi network and provides data to the server using the MQTT protocol. This makes it possible to see how much electricity is being used in real-time through websites and apps. So, the built system can be used to monitor how much electricity is consumed in an easier, more efficient, and more useful way
ANALISIS PERENCANAAN PLTS SEBAGAI SUPPLY ENERGI LISTRIK CHARGE STATION DI BRANDA CAFE UNIVERSITAS PEMBANGUNAN PANCA BUDI Muhammad Farijal; Pristisal Wibowo; Dino Erivianto
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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Abstract

availability of sustainable electrical energy is an essential requirement in the campus environment, particularly to support academic activities of students and academic staff in the use of electronic devices such as mobile phones and laptops. Currently, charge station facilities generally rely on conventional electrical energy supplied by the national grid, which has limitations and causes environmental impacts. Therefore, the utilization of renewable energy is an alternative solution that needs to be developed. This study aims to analyze the planning of a Solar Power Plant (Photovoltaic System) as a source of electrical energy for charge stations at Branda Cafe, Universitas Pembangunan Panca Budi. The research method employed is a quantitative descriptive approach, which includes analysis of daily electrical energy demand, charge station design planning, calculation of the number and capacity of solar panels, battery capacity planning, and selection of supporting PLTS components such as solar charge controllers and inverters. The results show that the total daily electrical energy demand of the charge station is 3,600 Wh. To meet this demand, the PLTS system is designed using nine 100 Wp solar panels, three 12 V 100 Ah batteries, one MPPT-type solar charge controller, and a 5,000 W inverter. The designed PLTS system is capable of providing a reliable, independent, and environmentally friendly electricity supply. Thus, the implementation of PLTS-based charge stations on campus can serve as an alternative solution to support sustainable renewable energy.
Studi Pengendalian Aliran Daya Pada Jaringan Listrik Tenaga Surya Terintegrasi Menggunakan Model Predictive Control Raihan Fahrezi; Hamdani; Beni Satria
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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The global energy transition towards sustainable sources has driven massive integration of Solar Power Plants (PLTS) into electricity systems, yet their intermittent nature presents significant operational challenges, particularly in low-voltage distribution networks. This research investigates the application of Model Predictive Control (MPC) for optimal power flow management in a 220V electrical network integrated with photovoltaic generation. The study addresses two main problems: designing an effective MPC strategy to control active and reactive power flow against solar irradiance variability, and quantitatively evaluating its performance compared to conventional Proportional-Integral (PI) control. Using MATLAB/Simulink simulation, a radial 5-bus 220V distribution network model with 10 kVA PV capacity was developed. The MPC algorithm was implemented with a prediction horizon of 15 steps, control horizon of 5 steps, and 1-second sampling time, optimizing voltage regulation and power loss minimization while respecting system constraints. Simulation results across three operational scenarios—irradiance step change, load variation, and combined disturbance—demonstrated MPC's superior performance. Specifically, MPC maintained voltage within ANSI C84.1 limits (±5%) with a Voltage Regulation Index of 0.021-0.025, achieved faster recovery times (8-12 seconds versus 18-25 seconds for PI), and reduced total power losses by 15-18%. The anticipatory control capability of MPC effectively mitigated voltage deviations caused by rapid irradiance fluctuations and load changes. These findings confirm that MPC offers a robust, proactive solution for enhancing stability and efficiency in low-voltage distribution networks with high solar penetration. The research contributes to renewable energy integration literature and provides practical insights for grid operators in managing power quality challenges.
Penanggulangan Transformator Distribusi Berbeban Lebih Dengan Metode Sisip Trafo Pada Penyulang PW-02 PT PLN (Persero) ULP Subulussalam Kota Filia Berkat Nanda Lumbantobing; Hamdani
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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Abstract

Distribution transformer is one of the most important components in the distribution of electric power from distribution substations to customers. Distribution transformers that experience loads exceeding 80% of the transformer capacity will affect the life of the distribution transformer and can also affect the level and quality of service to consumers and have the potential for disruption. Therefore, it is necessary to take action so that the percentage of distribution transformer loading does not exceed the transformer capacity by installing an Insert Transformer. At PT. PLN (Persero) ULP SUBULUSSALAM KOTA, there is a transformer that experiences overloading that occurs at the SKI072-00 Distribution Substation of 96.016% and after the Insert Transformer is installed, the loading at the SKI072-00 substation becomes 43.27%. This proves that the installation of an Insert Transformer is a fairly good method for overcoming overload disturbances at the SKI072-00 Substation, so that it can extend the life of the transformer, improve the quality of service to customers and reduce the potential for disturbances because the transformer loading below 80% can work well.
Pengaruh Penyesuaian Rating Fuse Cut Out (FCO) Percabangan terhadap Penurunan Frekuensi Gangguan Tegangan Menengah pada Penyulang TPN06 ULP Rantau UP3 Barabai Pandea Triaska Prasera; Pristisal Wibowo; Reza Juliangga
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
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The reliability of medium-voltage (MV) distribution networks is strongly influenced by the performance of protection systems, particularly Fuse Cut Outs (FCO) installed at feeder branches. TPN06 feeder at PT PLN (Persero) ULP Rantau, with a total network length of 15 km and 23 distribution transformers, experienced a high disturbance frequency during August–September 2024, with 8 recorded Auto Reclose Ground Fault (AR GF) incidents. Initial evaluation revealed that most installed FCO ratings were not aligned with the actual branch load currents. Several FCOs were found to be overrated, including Pulau Kutil (4 A adjusted to 2 A), Balai Pesona (4 A to 2 A), Sei Impat (4 A to 2 A), PR Binderang (4 A to 2 A), Jati Makmur (5 A to 2 A), Budi Mulya (5 A to 3 A), and Lokpaikat (25 A to 12 A), while only Bitahan (3 A) and PR Permata (2 A) were appropriately rated. This study aims to evaluate the effectiveness of FCO rating adjustments based on actual load current measurements and three-phase apparent power calculations at 20 kV. The methodology includes disturbance data analysis, peak load current measurement using an ampere clamp, and branch current calculation. The results indicate that adjusting FCO ratings improved protection selectivity and coordination, enabling better fault localization at branch levels. Following the adjustment at the end of September 2024, the disturbance frequency significantly decreased during October–November 2024, reaching zero incidents.
Kendali Kecepatan Motor Induksi Satu Fasa Pompa Submersible Menggunakan Fuzzy Logic Suci Wulan Dari; Beni Satria; Ahmad Dani
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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This study develops and implements a Fuzzy Logic Controller (FLC) for speed control of single- phase induction motors in submersible pump applications, addressing the critical need for energy-efficient variable speed drives in domestic and small-scale agricultural water systems. Single-phase induction motors are widely used in submersible pumps due to their simplicity and cost-effectiveness, yet conventional constant-speed operation results in significant energy waste under varying load conditions. The research employs both simulation using MATLAB/Simulink and experimental validation with a 0.75 kW motor-pump prototype to evaluate FLC performance against conventional PID controllers. The FLC is designed with seven triangular membership functions for each input (speed error and error rate of change) and output (frequency change), implementing 49 fuzzy rules based on expert knowledge. Experimental results demonstrate that FLC achieves superior performance with 38.58% faster rise time, 40.64% shorter settling time, 61.89% lower overshoot, and 74.49% smaller steady-state error compared to PID across various setpoint speeds. Energy efficiency analysis reveals 12.98% energy savings at 25% load and consistent improvements across all operating conditions, with weighted average efficiency of 67.55% versus 62.70% for PID. The FLC also exhibits excellent robustness under parameter variations, maintaining acceptable performance even with 20% resistance increase and 10% voltage drop. Power quality metrics show 3.45% higher power factor and 27.06% lower current Total Harmonic Distortion. Implementation costs remain identical to PID systems, providing superior performance without additional hardware investment. This research contributes practical solutions for national energy efficiency programs, with potential aggregate savings of hundreds of GWh annually if
Perancangan Sistem Pengemasan Barang Otomatis Berbasis PLC Omron Marsal Nasution; Ahmad Dani; Solly Aryza Lubis
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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This research aims to design and test Omron's PLC-based automated goods packaging system in the product packaging process. The system combines PLC technology, industrial robots, and sensors to improve efficiency and accuracy in packaging. The test was conducted in two modes, namely manual mode and automatic mode, with a focus on the filling process, bottle cap placement, and bottle cap sealing. The test results showed that in manual mode, the system can pack one bottle in a row, while in automatic mode, the system can pack three bottles efficiently with an efficiency of up to 99.99%. In addition, tests on the actuator and sensor show that all components are in good working order, and the system can detect the position of the bottle as well as control the milk flow with precision. The use of Omron's PLC as a control center provides ease of programming and improves system reliability. Overall, the study shows that Omron's PLC-based automated packaging system is effective in increasing productivity and reducing reliance on manual labor, with the potential to be applied in large-scale packaging industries.

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