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Jurnal Teknik Elektro
Published by Universitas Negeri Semarang
ISSN : -     EISSN : 25491571     DOI : https://doi.org/10.15294/jte
Core Subject : Engineering,
Electrical & Electronics Engineering
Jurnal Teknik Elektro merupakan jurnal yang berisikan tentang artikel dalam bidang Teknik Elektro (Ketenagaan, Elektronika dan Kendali, Pengolahan Isyarat serta Komputer dan Informatika)
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 5 Documents
 1 
Search results for , issue "Vol. 16 No. 2 (2024)" : 5 Documents clear
State of Charge Balancing Analysis Using Droop Control on Energy Storage System Muhammad Cahyo Bagaskoro; Aripriharta; Muhammad Afnan Habibi; Gabrielley Ferdhiansyah Riyadi
Jurnal Teknik Elektro Vol. 16 No. 2 (2024)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v16i2.8280

Abstract

The growing energy crisis has driven the global shift toward renewable energy development. Governments are taking significant steps by promoting diverse sources such as photovoltaic (PV), wind turbines, and battery systems. Among these, Battery Energy Storage Systems (BESS) play a crucial role in decentralized energy generation, especially in DC microgrids. Within BESS, Battery Energy Storage Units (BESUs) are vital components, where monitoring the State of Charge (SOC) is essential. The Coulomb Counter (CC) method is widely used due to its reliability in SOC estimation. This study introduces a dynamic SOC balancing strategy using droop control, aiming to maintain uniform SOC across multiple BESUs. The proposed method regulates BESU discharge behaviour to achieve SOC parity and optimize energy distribution throughout the microgrid. Simulations under various operating scenarios charging and discharging modes with different SOC levels were conducted using the MATLAB/SIMULINK® environment. The results show that the control approach effectively equalizes SOC levels under non-uniform initial conditions. The balancing duration varied according to the initial SOC difference, highlighting the controller's adaptability. Although the study did not directly measure battery lifespan or energy efficiency, enhanced SOC uniformity is expected to reduce current imbalances and operating stress, potentially improving long-term system reliability. This research offers valuable insights into the control and management of BESS, supporting the stable integration of renewable energy in modern microgrid applications.
Design and Analysis of a Hexagonal Patch Antenna Operating at 3.5 GHz for Wireless Communication Applications Barnadi, Yudi; Kurniaviep Sugeng , Ajeng Mayang; Suryana , Ase; Santiko, Arief Budi
Jurnal Teknik Elektro Vol. 16 No. 2 (2024)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v16i2.13902

Abstract

Microstrip antennas are widely recognized for their compact structure, low profile, and ease of fabrication, making them highly suitable for modern wireless communication systems. Traditionally, these antennas incorporate a rectangular metallic patch as the radiating element. In this study, a novel microstrip antenna design featuring a hexagonal metal patch is proposed, specifically optimized to resonate at 3.5 GHz, a frequency band allocated for 5G wireless communication applications. The antenna is constructed on an F4BMX220 substrate with a thickness of 1.5 mm, chosen for its favorable dielectric properties and mechanical stability. The feeding mechanism employs an inset-fed microstrip line, enabling better impedance matching and improved power transfer. A full ground plane is used on the underside of the substrate to enhance isolation and minimize back radiation. The complete design, simulation, and optimization processes are carried out using CST Studio Suite, a professional electromagnetic simulation tool. Key performance parameters such as return loss (S11), directivity, and gain are thoroughly analyzed. The design aims to achieve an S11 value below -10 dB, ensuring efficient radiation at the target frequency. With its optimized structure and favorable performance, the proposed antenna serves as a promising candidate for integration into next-generation 5G communication systems. Based on the fabricated prototype, the antenna demonstrates a gain of 4.5 dBi and a bandwidth of 24 MHz.
Techno-Economic of Rooftop Solar Power Plants for Residential Customer in Indonesia Putri, Dianing Novita Nurmala; Fariz Maulana Rizanulhaq; Tyas Kartika Sari; Maula Sukma Widjaja; Chairul Gagarin Irianto
Jurnal Teknik Elektro Vol. 16 No. 2 (2024)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v16i2.14514

Abstract

This study evaluates the financial viability of grid-connected rooftop photovoltaic (PV) systems across seven Indonesian residential types (2.75-19.8 kWp) under current market conditions. Using a discounted cash flow model with 8% discount rate and a 20-year project lifetime, key metrics including Net Present Value (NPV), Levelized Cost of Electricity (LCOE), and payback period have been analysed. Results demonstrate that system economics improve significantly with scale: while small systems (2.75 kWp) yield negative NPV (-Rp 9.71 million) and 12.4-year payback, larger installations (>7.7 kWp) achieve positive NPV (up to Rp 89.95 million for 19.8 kWp systems) and sub-10-year payback periods. The LCOE ranges from Rp 1,082-1,205/kWh, representing 11-36% cost savings compared to PLN's tiered tariffs (Rp 1,352-1,699.53/kWh). Monthly savings scale proportionally with system size, from Rp 323,378 (2.75 kWp) to Rp 2.84 million (19.8 kWp). A critical 7.7 kWp capacity threshold emerges for self-sustaining viability without subsidies, with 3500+ VA customers benefiting most due to higher avoided tariffs. These findings provide policymakers with evidence to design tiered incentive programs targeting underperforming market segments (<6 kWp systems), while confirming the commercial readiness of larger residential-commercial hybrid systems in Indonesia's solar transition.
Systematic Review: Enhancing Photovoltaic Performance through Hydrophobic Surface Coatings and Heat Mitigation Pawawoi, Andi Pawawoi; Refdinal, Refdinal Nazir; Hamid, Muhammad Imran Hamid
Jurnal Teknik Elektro Vol. 16 No. 2 (2024)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v16i2.19586

Abstract

Surface coatings are essential for improving the performance of photovoltaic (PV) modules, particularly in challenging environments such as hot and dusty tropical regions or low-radiation subtropical areas. This study reviews recent developments in hydrophobic and heat-mitigating coatings that address two main problems: soiling and overheating. Both issues significantly reduce the efficiency and lifetime of PV systems. By systematically reviewing 32 selected studies, this paper identifies coating materials that combine self-cleaning, thermal regulation, and optical benefits. Among them, three-layer superhydrophobic coatings, silica–silane nanocomposites (e.g., SiO₂–PDMS, HDTMS–SiO₂), and Al₂O₃–H₂O nanofluids showed remarkable improvements in power output, optical transmission, and heat dissipation. For example, a three-layer superhydrophobic coating increased output power by 195.2% under simulated drizzle with heavy soiling, while SiO₂–PDMS nanocomposite films reduced surface temperature by 3.5 °C without reducing efficiency. These findings confirm that coating selection must balance hydrophobicity, heat management, durability, and cost. This review also highlights research gaps, particularly in long-term durability testing and large-scale application. The results provide practical guidelines for selecting appropriate coatings in different climates and suggest directions for developing multifunctional and scalable PV surface technologies.
Arduino Controlled Automatic Capacitor Bank for Power Quality Improvement in Household Scale Zen, Hafidz Nindhom; Ibrohim; Haryudo, Subuh Isnur; Endryansyah
Jurnal Teknik Elektro Vol. 16 No. 2 (2024)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v16i2.33936

Abstract

The use of inductive loads on a household scale, especially in electricity customers with a power of 1300 VA, often leads to low power factor values (cos φ) which degrades power quality. This study aims to design and build an Arduino-based automatic capacitor bank system capable of dynamically improving power quality in 1300 VA household electrical installations. The system integrates an Arduino Nano microcontroller with a PZEM-004T sensor to monitor electrical parameters—such as voltage, current, and cos φ—in real time and automatically controls capacitor switching through relays to provide the most suitable compensation. Experimental results show that the system successfully increased the power factor from an average of 0.75 to 0.97 under varying load conditions. In addition, the implementation reduced reactive power by up to 65% and demonstrated potential savings in electricity bills of approximately 8–12% for household consumers. These findings indicate that the proposed system not only improves power factor close to ideal conditions (cos φ ≈ 1) but also enhances overall energy efficiency and provides tangible economic benefits for household users.

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