Article Per Year (5 Year)
p-Index From 2019 - 2024
1.573
P-Index
This Author published in this journals
All Journal Jurnal Teknologi Elektro Jurnal Elementer (Elektro dan Mesin Terapan) RELE: Rekayasa Elektrikal dan Energi Jurnal Teknik Elektro Jurnal Riset Rekayasa Elektro Journal of Applied Electrical Engineering BEES: Bulletin of Electrical and Electronics Engineering Jurnal Teknik Informatika dan Elektro (JURTIE)
Widagdo, Reza Sarwo
Unknown Affiliation
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Mechanical Engineering

Published : 10 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 10 Documents
Search

 1 
IMPACT OF BALL BEARING DAMAGE VARIATIONS ON THE EFFICIENCY OF SQUIRREL CAGE 3-PHASE INDUCTION MOTORS Widagdo, Reza Sarwo; Andriawan, Aris Heri; Prenata, Giovanni Dimas
-
Publisher : RELE (Rekayasa Elektrikal dan Energi) : Jurnal Teknik Elektro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rele.v7i1.20192

Abstract

This research aims to determine the initial diagnosis of damage to a 3-phase induction motor. Ball bearings are one of the important components in this induction motor which play a role in supporting the load and allowing smooth rotation. However, like all mechanical components, ball bearings in 3-phase induction motors are also susceptible to failure in motor performance and can even cause damage to the motor as a whole. There are ways to detect several disturbances in induction motors, namely through speed analysis, current fluctuations, and increases in motor temperature when operating. Based on the results of measurement data for 14 days, the average current value in normal bearing conditions is 1.36 A, while in broken bearing conditions the average current value is 1.55 A and in rusty bearing conditions 1.52 A. The increase in current is due to because the rotor does not rotate in a balanced manner so that the electric field in the stator changes, this causes an increase in the motor's current and temperature.
The Impact of Load Unbalance on Neutral Conductors Losses and Transformer Efficiency Widagdo, Reza Sarwo; Prenata, Giovanni Dimas; Rafli, Syah Achmad Amar
BEES: Bulletin of Electrical and Electronics Engineering Vol 5 No 1 (2024): July 2024
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/bees.v5i1.5540

Abstract

The transformer is a crucial component in the electrical energy distribution system. Therefore, strict supervision is necessary to ensure that the electricity supply network is maintained and safe during operational processes. This research aims to measure the transformer load installed at PT. Sunrise Steel to determine the values of loading, imbalance, power losses, and efficiency of the loaded transformers. This measurement is important to ensure that the values resulting from operational processes do not exceed predetermined limits. Observations over 10 days show that the peak load value during operational time is 66.08%, which can still be categorized as quite good. The load imbalance reached a maximum value of 10.13%, which is categorized as poor since SPLN regulations state that a good imbalance should be below 10%. The percentage of power loss has a maximum value of 0.33%, and the best transformer efficiency reaches 97.17%, which is the highest efficiency value considering several other loss parameters.
Analysis of Determining the Surge Arrester Protective Distance for Protection on 60 MVA Power Transformers at the 150 KV Main Substation in Surabaya Barat Widagdo, Reza Sarwo; Budiono, Gatut; Nasichin, Miftachun
Jurnal Riset Rekayasa Elektro Vol 6, No 1 (2024): JRRE VOL 6 NO 1 JUNI 2024
Publisher : PROGRAM STUDI TEKNIK ELEKTRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/jrre.v6i1.21555

Abstract

Because it provides electrical energy to customers that require protection from lightning interference, the substation is a crucial location. An electrical equipment's defense against lightning strikes is provided by a lighting arrestor. The arrester should be placed as near to the transformer as feasible for optimal protection. In order to restrict the installation of arresters to safeguard equipment, the maximum distance for arrester installation must be established. This study only looks at one 60 MVA transformer in the Surabaya Barat Main Substation, and its goal is to determine the minimum amount of error in transformer protection. Based on the maximum possible surge arrester surge arrester jarak with a power transformer at the Surabaya Barat Main Substation, the maximum possible surge arrester distance is 8,135 meters. Based on surge arrester capability, the transformer may be protected from over voltage since the maximum voltage that can occur is just 150.83 kV, with the maximum voltage remaining below the transverse impulse drop of around 650 kV.
Prediction of Age Loss on 160 KVA Transformer PT. PLN ULP Kenjeran Surabaya using The Linear Regression Method Widagdo, Reza Sarwo; Andriawan, Aris Heri
Jurnal Riset Rekayasa Elektro Vol 5, No 2 (2023): JRRE VOL 5 NO 2 DESEMBER 2023
Publisher : PROGRAM STUDI TEKNIK ELEKTRO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/jrre.v5i2.18140

Abstract

Distribution transformer is one of the important equipment in the distribution of electricity to consumers. The electricity demand increases every year, so that the transformer works optimally, it must also be considered regarding the loading. According to IEC 354 if the transformer is loaded stable 80% with conditions around 20℃ and the winding temperature is 98℃, but if the ambient temperature is more than 20℃ then the age of the transformer will decrease. With an average loading of 71.75%, based on the calculation that the predicted useful age of the 160 KVA distribution transformer in 2027 will have an age loss index of 1.1 p.u, so it is estimated that the remaining age of the distribution transformer is 12 years and 7 months. Analysis using a statistical approach assisted by SPSS software was also carried out to see how much influence the loading has on the age loss of the transformer.
Harmonic Mitigation with Active Filter in Coal Boiler Plant PT. Salim Ivomas Pratama Widagdo, Reza Sarwo; Andriawan, Aris Heri; Tauladan, Imam Suri
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol. 9 No. 2 (2023): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v9i2.6047

Abstract

Coal Boiler Plant at PT. Salim Ivomas Pratama is a plant for making steam, almost all activities in the cooking oil and margarine production process utilize electrical energy, such as submersible and centrifugal electric motors with controllers, computers, AC inverters, and many others which include non-linear loads. Electrical load whose correlation between voltage and current is unbalanced, this non-linear load will result in harmonic disturbances in the electric power system which causes a reduction in the service life of electrical equipment. Harmonics are defined as voltage and current frequency distortions that are not sinusoidal from pure frequencies. This study aims to determine how effective the active filter design simulated with the PSIM Software is in reducing harmonics with a non-linear load of 3 VSD connected to a 55 kW, 0.37 kW, and 7.5 kW induction motor. The results of measurements and analysis show that there are harmonics on the panel. SDP with a current harmonic value for phase R of 26.6%, phase S of 27.5%, and phase T of 25.5%, when compared with standard harmonics, all phases exceed the standard SPLN with a standard value of 20%. Then it is necessary to reduce harmonics with an active filter, after designing andsimulating it in the PSIM software the simulation results show that the current harmonics have changed for phase R by 3.3%, phase S by 4.0%, and phase T by 3,4 %. This shows that the design of the active filter is quite effective in mitigation a harmonic, to then be applied in practice at PT. Salim Ivomas Pratama in reduction the harmonics in a coal boiler plant.
Perencanaan Sistem Penyalur Petir Eksternal Pada Gedung SMK Sultan Agung 1 Tebuireng Jombang Medika, Aditya Surya; Slamet, Puji; Widagdo, Reza Sarwo
Jurnal Teknik Informatika dan Elektro Vol 5 No 2 (2023): Juli : Jurnal Teknik Elektro dan Informatika
Publisher : Universitas Gajah Putih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55542/jurtie.v5i2.710

Abstract

Lightning is a natural phenomenon that can damage buildings. There is a solution to dealing with damage from lightning strikes, namely by installing lightning protection. Lightning protection consists of termination rods, distribution cables and earthing, from the results of analysis and calculations at the Sultan Agung 1 Tebuireng Vocational High School building, Jombang requires a total 11 termination rods, 2 distribution cables for each building and 2 rods planted 3 meters deep with a distance of 15 meters so that the grounding value is below 5 ohms
Analisis Ketidakseimbangan Beban Pada Tranformator Distribusi Di Gardu Induk Budurn Wijayanto, Viky; Slamet, Puji; Widagdo, Reza Sarwo
Jurnal Teknik Informatika dan Elektro Vol 5 No 2 (2023): Juli : Jurnal Teknik Elektro dan Informatika
Publisher : Universitas Gajah Putih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55542/jurtie.v5i2.725

Abstract

Electricity is a basic need for humans today, it has been proven that humans are very dependent on electricity for their daily activities. If electricity is not available, then human daily activities will be disrupted. The occurrence of load imbalance that occurs in the R, S, and T phases due to the absence of concurrent when the load is turned on, resulting in a neutral current flow on the secondary side of the transformer. with the development of electric power distribution systems. The benefit of reducing losses on the neutral conductor of the distribution transformer is that it can produce savings in the supply of electricity, and other benefits obtained include the resulting system. The method used is that the data resulting from field measurements are converted into mathematical equations. From the research conducted, the results showed the average value of the loading current and load imbalance in the distribution transformer at the Buduran Substation, namely the average loading current of (14.4 A), Load Imbalance of (28.3 A), Neutral Current Losses of (2.34 W). And Copper Losses of (0.510945 kW).
Prediction of Transformer Age Based on Temperature Due to Loading Using Linear Trend Method: Case Study of 60 MVA Transformer Widagdo, Reza Sarwo; Slamet, Puji; Ubaidillah, Muhammad
Journal of Applied Electrical Engineering Vol 8 No 1 (2024): JAEE, June 2024
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jaee.v8i1.6999

Abstract

Power Transformers are one of the core equipment found in substations. Every year the need for electricity increases, so that the transformer can work optimally, the loading must also be considered. According to IEC 354, if the transformer is underload it is 100% stable at conditions around 20℃ and the winding temperature is 98℃, but if the ambient temperature is more than 20℃ then the life of the transformer will be reduced. In this research, the loading data used is a 60 MVA power transformer for 2020-2022, specifically to predict the age of the transformer from the load increase factor in the coming year using the linear trend method. The linear trend method aims to predict the burden in the following year and every year the burden increases. an increase of 2%. To find out the results of load forecasting, the prediction in 2030 has a life loss value of 1.2 p.u or the estimated remaining life of the power transformer is 1 year 6 months with a load of 88.64%.
Unbalanced Voltage Detection with Measurement Analysis Current Signature (MCSA) in 3-Phase Induction Motor Using Fast Fourier Transform (FFT) Widagdo, Reza Sarwo; Hermawati, Fajar Astuti; Hariadi, Balok
Jurnal Teknologi Elektro Vol 15, No 2 (2024)
Publisher : Electrical Engineering, Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jte.2024.v15i2.003

Abstract

This paper presents a computational tool for detecting unbalanced voltage supplies in induction motors. For real-time applications, a technique based on the Fast Fourier Transform (FFT) was used to compute the desired component frequency. A Labview virtual instrument was used to implement the computer algorithm. When supply voltage unbalance appears identical, fault diagnosis using current signature analysis becomes more difficult. The detection percentage is calculated in the following conditions: balanced voltage, under voltage (10%), over voltage (5%), and mixed voltage (UV 5% + OV 5%). The unbalanced voltage waveforms are then analyzed using the classical Fast Fourier Transform (FFT). The results were detected at frequencies of 25 Hz and 75 Hz with a high amplitude of -30 db, when compared with healthy conditions at this frequency there was no spike in amplitude values. So by using the MCSA method with the fast Fourier transform approach analysis, it was successful in detecting voltage unbalance disturbances in 3 phase induction motors.
Harmonic Mitigation in Microgrid to Improve Power Quality Widagdo, Reza Sarwo; Andriawan, Aris Heri; Hartayu, Ratna
Jurnal Teknologi Elektro Vol 15, No 1 (2024)
Publisher : Electrical Engineering, Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jte.2024.v15i1.003

Abstract

Microgrids are a technology that is developing quite rapidly and is attracting world attention in facing the energy and pollution crisis. There are three types of microgrid structures: AC, DC, and AC-DC hybrid microgrid. Because it consists of an AC bus and a DC bus, AC-DC hybrid microgrids can connect more types of Distributed Generation (DG) and have smaller converter losses, making it more economical and reliable than other types of microgrids. Due to the use of nonlinear devices, harmonic distortion in microgrids is a problem that needs to be solved. In this research, the AC-DC hybrid microgrid system is simulated using ETAP software. Then the characteristics of the distribution of harmonics in the system obtained from harmonic load flow simulations are also analyzed. Following the installation of the passive filter, Bus 1 and Bus 2 now suitable to the IEEE Std standards 519-1992 for harmonic values. After the application of the filter, Bus 1 refer a THD of 1.32%, while Bus 2 indicate a THD of 0.84%. In addition, the Individual Harmonic Distortion (IHD) for Bus 1 has dropped below 3% at the 5th harmonic and below 1.5% at the 13th harmonic. Besides that, Bus 2 IHD has decreased to less than 3% at the 11th harmonic and less than 1.5% at the 13th harmonic.
Co-Authors Aris Heri Andriawan, Aris Heri Balok Hariadi, Balok Fajar Astuti Hermawati Gatut Budiono Hartayu, Ratna Medika, Aditya Surya Nasichin, Miftachun Prenata, Giovanni Dimas Puji Slamet, Puji Rafli, Syah Achmad Amar Tauladan, Imam Suri Ubaidillah, Muhammad Wijayanto, Viky