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Journal of Electrical Technology UMY
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 25501186     EISSN : 25806823     DOI : 10.18196/jet
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Library & Information Science
The Journal of Electrical Technology UMY (JET-UMY) is a peer-reviewed journal that publishes original theoretical and applied papers on all aspects of Electrical, Electronics, and Computer Engineering.
Arjuna Subject : -
Articles 115 Documents
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Electrical Design of a Portable Pure Sine Wave Inverter Using Ferrite Core Transformer and Double Stage Technique Kunnu Purwanto; Aditya Agus Wijayanto; Yudhi Ardiyanto; Karisma Trinanda Putra
Journal of Electrical Technology UMY Vol 7, No 1 (2023): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i1.17912

Abstract

The size of the iron core transformer in an inverter is large and heavy because it has more conductor turns and works at low frequencies. In contrast, ferrite core transformers are designed to work at high frequencies, so the number of turns of the conductor is less, and the transformer size is relatively small and light. Device portability is a significant challenge in designing high-power inverters. This research uses a ferrite core transformer to design a portable pure sine wave inverter. A two-stage technique is proposed in designing the inverter so that the dc-link voltage and capacitor size can be flexibly selected, and the device size can be compacted. The design consists of two stages. First, a circuit to generate a 400-Volt DC voltage is designed using IC SG3525, a MOSFET power amplifier, and a ferrite core step-up transformer. Second, a pure sine wave generator circuit is constructed using an EGS002 module, MOSFETs, and a filter circuit. Experiments are performed by measuring the output voltage, monitoring power and frequency, and observing the waveform with an oscilloscope. The results reveal that the designed inverter can generate a 220-volt pure sine wave output, a maximum power of 500 Watts, a frequency of 50 Hz, and an efficiency between 91.4% to 98.1%.
Modified Perturb and Observe Approach in MPPT for a Standalone Photovoltaic System Ramadoni Syahputra
Journal of Electrical Technology UMY Vol 6, No 2 (2022): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v6i2.18354

Abstract

This paper proposes a modified perturb and observe algorithm approach to increase the output power of an independent photovoltaic system. Today, photovoltaic application as renewable energy power plant has been prevalent. This popularity is because photovoltaic power plants are easy to apply on-grid and off-grid schemes. In standalone power generation applications, the increased photovoltaic output power is of great help to users as it contributes to increasing overall system efficiency. The perturb and observe algorithm has been known as a reliable and inexpensive method. However, the performance still needs to be improved. Therefore, this study proposes a modified perturb and observe algorithm approach. The research results show the superiority of the proposed method.
A Simple Approach to Incorporating STATCOM into a Newton-Based Power Flow and Optimal Power Flow Algorithms Muyideen Olalekan Lawal
Journal of Electrical Technology UMY Vol 7, No 1 (2023): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i1.17957

Abstract

Incorporating STATCOM into existing power flow (PF) or optimal power flow (OPF) algorithm usually requires the development of complex program codes to represent associated derivatives introduced by STATCOM power flow models. This procedure is time consuming as it may require various corrections of errors before having a suitable program that effectively solves the problem. To avoid this stress, an efficient way of incorporating STATCOM’s power flow models into an existing Newton-based PF and OPF algorithm is presented in this paper. These models introduce the magnitude and angle of the STATCOM’s source converter’s voltage as a state variable into the PF and OPF problem formulations. This work simply treats the STATCOM as a PV-bus with zero real power in existing PF and OPF algorithms. The proposed procedures were applied to a 5-bus test system and the results obtained were validated with similar works available in open literature. After a satisfactory performance, it was further applied to the 30-bus and 57-bus IEEE test systems. The results obtained show the effectiveness of the proposed procedures in voltage profile improvement. For example, the PF results show that the voltage magnitudes of the two buses with STATCOM in the 30-bus system were improved from 0.9881 pu and 0.9702 pu to 1.027 pu and 1.041 pu, respectively. Also, the OPF results show that the voltage magnitudes of the three buses with STATCOM in the 57-bus system were improved from 1.063 pu, 0.90 pu and 0.9683 pu to 1.039 pu, 0.9796 pu and 1.0144 pu, respectively.
Design of Wind Power Generator for Tambak Houses Marhatang Marhatang; Herman Nawir; Muhammad Ruswandi Djalal; Maudini Maudini; Muh Amar Syarifuddin
Journal of Electrical Technology UMY Vol 7, No 1 (2023): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i1.17457

Abstract

Wind Power Generation (WPG) requires specific wind conditions to generate electrical energy. Indonesia's wind potential enables the development of small-scale power plants. Innovations in windmill technology need to be developed to ensure maximum results in low wind speed conditions. This research proposes the design and implementation of WPG using a vertical axis to provide lighting for pond houses. The goal is to benefit pond workers in coastal areas that lack electricity from the National Electric Company. The manufacturing stages include design and testing. Based on the design results, the dimensions of the propeller area are 0.393m, the frame height is 1.5m, and the wind turbine height is 0.75m. The performance test of the WPG yielded the highest turbine power value at 15.30 WITA, with a turbine power output of 25.38 Watts.
Design of Battery Charging System with CC-CV Method Using Interleaved Buck-Boost Converter I Gusti Agung Ayu Devi Anjani; Moh Zaenal Efendi; Ony Asrarul Qudsi
Journal of Electrical Technology UMY Vol 7, No 1 (2023): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i1.16932

Abstract

The transition of renewable energy has become an interesting issue and a worldwide concern that is frequently discussed. Solar panels are regarded to have the most potential in tropical areas like Indonesia. However, weather and sunlight intensity have a substantial impact on the amounts of electricity generated by solar panels. Therefore, a battery which functions as a backup supply is required. Lead acid batteries are used in numerous applications. The performance of lead-acid battery is commonly influenced by temperature and charging time, which makes it vulnerable to overcharging. Multistage charge methods, namely Constant Current-Constant Voltage (CC-CV), are used to extend battery life, reduce charging time, and avoid the risk of overcharging. Fuzzy Logic Controller (FLC) is used to adjust charging current and voltage on the battery based on the setpoint. Based on the CC-CV charging system simulation results, a constant current value can be obtained when the CC condition is 4.5 A, and a transition to the CV condition occurs when the voltage value on the battery reaches 14.4 V. When the battery reaches its maximum capacity, the current is reduced to 3% of the battery’s capacity. The rate of fully charged current triggers the relay to turn on, to ensure that the charging process has been completed.
LTE Advanced Network Performance Analysis for Smartfren and Telkomsel in the City of Yogyakarta Widyasmoro Widyasmoro
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.18762

Abstract

This study investigates comprehensive assessment of LTE-Advanced network performance in urban environment of Sudirman Road and Malioboro Road, Yogyakarta, Indonesia. This study aims to measure and assess the performance or quality of the LTE-Advanced network based on the Quality of Service (QoS) and Signal Strength parameters using the drive test measurements data collection method. This study analyses signal strength parameters (RSRP and RSRQ) and quality of service metrics (delay and jitter) across two prominent operators, Smartfren and Telkomsel. Our investigation unveils robust signal strength from both operators at Sudirman Road, with Smartfren demonstrating notable superiority in RSRQ. Similarly, at the Malioboro Road, both operators exhibit commendable RSRP, with Smartfren maintaining a marginal advantage. In terms of quality of service, our findings affirm that both Smartfren and Telkomsel consistently deliver low latency and maintain satisfactory jitter levels, ensuring uninterrupted connectivity experiences for users. While Telkomsel typically leads in delay performance, Smartfren showcases superior jitter performance at specific points at Sudirman Road. Conversely, at Malioboro Road, Telkomsel outperforms Smartfren in both delay and jitter metrics. These insights offer invaluable guidance for network optimization strategies, empowering operators to enhance service quality and enrich connectivity for the users in Yogyakarta. Furthermore, our study contributes to the broader understanding of LTE-Advanced network performance, emphasizing the significance of signal strength and quality of service parameters in ensuring optimal user experiences in urban environments.
IoT Smart Control System: Smoke and Fire Detection Using SIM900A Module Rahmat Fauzi Siregar; Affandi Affandi; Rohana Rohana; Arya Rudi Nasution; Iqbal Tanjung
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.19908

Abstract

The main focus of this system is to detect smoke and fire effectively in potential hazard situations. This system utilizes sensor technology to monitor changes in environmental conditions, with the aim of providing quick responses and notifications to users or relevant authorities via a cellular connection. This approach combines feedback signals from sensors and cellular connectivity using the SIM900A module processed with a microcontroller to increase the efficiency and reliability of hazard detection. This system was designed with the aim of providing an efficient and affordable solution for detecting potential fires or other hazardous situations in various environments, including homes, offices and industrial areas. Trial results show that this system is capable of detecting smoke and fire with high accuracy, as well as providing instant notifications via text messages or digital notifications. This innovation is expected to make a positive contribution in improving safety and security in various sectors, while leveraging the potential of IoT connectivity to provide smarter solutions in hazard detection.
Design of Automatic Transfer Switch System Solar Power Plant – PLN
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.14651

Abstract

The utilization of solar power for generating energy is increasing in scale. The Solar Power Plant (SPP) operating system comprises On Grid, Off Grid, and Hybrid systems. To successfully execute a power supply transfer operation, it is important to do thorough study. The transfer process is automated by the utilization of voltage sensors. The voltage sensing is derived from the output of both the SPP system and the PLN (Indonesian State Electricity Company) system. This study involved conducting prime SPP (Self-Paced Reading) and prime PLN (Picture Naming) tasks. The stress analysis technique is conducted during transfer in both primes. When converting SPP to PLN and transferring from PLN to SPP, voltage measurements are conducted if the SPP is in its prime state. When the power line network (PLN) is in its optimal state, voltage measurements are conducted during the transition from PLN to the solar power plant (SPP) and vice versa. When the SPP is in its prime state, the average voltage during the transfer from SPP to PLN is at 217.8 V, as indicated by the measurement findings. The average voltage for transferring power from the power grid (PLN) to the power plant (SPP) is at 225.4 V. During the peak power load period, the average voltage transferred from the power grid (PLN) to the power plant (SPP) is at 220.18 V, whereas the average value when moving from SPP to PLN is at 220.12 V. At the prime PLN, there is a minor voltage variance due to the higher stability of the PLN voltage.
Designing Device of Touchless Smart Lift using Voice Commands with Method of Speech Recognition based on the Internet of Things to Prevent the Spread of COVID-19
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.21108

Abstract

In Indonesia, the number of sufferers who were confirmed positive for COVID-19 as of May 14, 2021 approximately 1,734,285 people. One of the causes of the spread of COVID-19 is indicated by passengers touching the lift push button panels. Based on these problems, a device of touchless Smart Lift was designed using voice commands with the method of speech recognition. This voice command controls hardware using the human voice. Voice commands are part of speech recognition methods. The speech recognition method is very suitable to be applied to controlling a lift, so that lift users can access the intended floor via a smart speaker. From testing the performance of the smart lift, the results obtained were that the infrared temperature sensor distance 5 cm with a temperature of 36.65oC. The fastest response time testing 2.14 seconds. Sensor weight testing 195.5 Kg. Testing the accuracy of voice commands for the first and second floors obtained the best results of 100% and for the third floor 95%. From the results of this research, it is hoped that the smart lift device will be able to reduce the spread of COVID-19 without touching the lift push button panel.
Implementation of a PI-Controlled Closed-Loop System for Mecanum Wheel Coordination in an Omni-Directional Robot
Journal of Electrical Technology UMY Vol 7, No 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v7i2.22263

Abstract

The MR CRUSH robot is designed for participation in the 2023 Indonesian Thematic Robot Contest (KRTMI). In the motor part of the MR CRUSH robot, each wheel is designed to rotate independently and using a mecanum wheel system. Mecanum wheels are a type of wheel that has the ability to move in all directions by combining rotational speed and direction. To maximize this capability, the force generated on each mecanum wheel must be the same as set point. One of the influences of the amount of force produced is the mecanum wheel rotation speed. This research aims to implement a closed-loop control system with a Proportional-Integral (PI) controller. By implementing this PI controller, it ensures that the rotation speed of the dc motor corresponds to the set point value given, so that the four dc motors that drive the mecanum wheel will have the same rotation speed. The parameters for the PI controller used in this research are Kp = 0.3 and Ki = 0.08. Based on the results, the closed-loop control system with the designed PI controller produces constant motor rotation speed at the set point with 0 steady-state error.

Page 11 of 12 | Total Record : 115

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