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ELPOSYS: Jurnal Sistem Kelistrikan
Published by Politeknik Negeri Malang
ISSN : 2407232X     EISSN : 24072338     DOI : https://doi.org/10.33795
Core Subject : Science, Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering
ELPOSYS adalah jurnal nasional yang menyediakan sumber informasi ilmiah bagi peneliti dan akademisi, lembaga penelitian, lembaga pemerintah, dan industri. Kami menerbitkan research papers, review articles, dan case studies yang berfokus pada bidang ketenagalistrikan serta topik yang terkait. Semua makalah di-review oleh setidaknya dua reviewer. ELPOSYS diterbitkan oleh UPT – P2M Politeknik Negeri Malang dan diterbitkan tiga kali setiap tahun, yaitu Bulan Februari, Juni, dan Oktober. Artikel yang dipublikasikan bidang ilmunya sesuai atau relevan dengan topik-topik Jurnal ELPOSYS yang meliputi bidang (namun tidak terbatas pada): - Pembangkit, - Distribusi dan Transmisi Daya, -Konversi Daya, - Sistem Proteksi, - Transformator, - Teknologi Instalasi Listrik, - Kualitas Daya, - Aplikasi Teknologi Informasi pada Sistem Daya, - Aplikasi Kontrol Cerdas pada Sistem Daya, - Teknologi Pembangkitan berbasis Energi Terbarukan, - Mesin-mesin Listrik, - Pemodelan dan Simulasi Sistem Daya, - Elektronika Daya, - Pengukuran Besaran Listrik, - Kestabilan Sistem Daya, - Topik lain yang terkait.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 184 Documents
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Fenomena Back Flashover Akibat Sambaran Petir Pada SUTT 150 kV Haurgeulis–Sukamandi#2 Septian Pramuditia Putra
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5168

Abstract

Lightning disturbances on the 150 kV High Voltage Overhead Transmission Line (SUTT) Haurgeulis-Sukamandi #2 were analyzed to understand their causes and impacts. This study aims to identify and analyze lightning-induced disturbances using data from Fault Locator, Digital Fault Recorder, and Lightning Detection System. The methods used include calculating the protection angle, analyzing the maximum current before shield failure, and applying the Rolling Sphere method. The analysis results showed that the lightning current of -22 kA exceeded the tower's shielding capacity, causing a Back Flash Over phenomenon that led to system disruption. This finding was confirmed by comparing the measured voltage with the breakdown voltage of the insulator. The implications of this study highlight the importance of enhancing lightning protection systems, such as reducing tower grounding resistance and installing inductance reducers, to prevent similar disturbances in the future. This research provides valuable insights for improving the reliability and safety of power transmission networks in lightning-prone areas.
Analisis Kondisi Isolasi Pada Station Service Transformer (SST) Rachmat Sutjipto; Harrij Mukti K; Kharisma Eka Dzulfiqar
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5186

Abstract

There is an identified oil leak in SST Unit 1 at Paiton Power Plant, discovered after a fault indicator in Central Control Room. Visual inspection revealed that the gasket seal on the fastening bolts was damaged due to the seal reaching its lifetime limit. Continuous oil leaks degrade the transformer's oil, reducing its volume and impairing the transformer's cooling performance. The research aims to evaluate the insulation condition of the SST transformer before and after replacing the damaged gasket seal (repacking). This evaluation ensures the transformer's optimal performance and reliability by preventing potential failures caused by degraded insulation. The research employs a quantitative approach, using various tests to assess the insulation resistance of the transformer, including the Polarization Index (PI), Tangent Delta, and Breakdown Voltage tests. Data were collected from technical assessments and measurements conducted on-site at PT. PLN Nusantara Power (PLN NP). The comparison of data before and after repacking indicated significant improvements in the insulation condition of the SST transformer. All test results—PI, Tangent Delta, and Breakdown Voltage—met the standards post-repacking, showing better performance than before. Specifically, the Polarization Index and Tangent Delta values improved substantially, aligning with the IEEE C57.152-2013 standard, and the Breakdown Voltage met the IEC 60156-95 standard. The findings suggest that timely maintenance, such as gasket seal replacement, is crucial for maintaining the insulation quality and overall performance of transformers. Regular inspections and adherence to testing standards can prevent operational failures and extend the lifespan of critical electrical equipment.
Efektivitas Mutasi Transformator Dalam Mengatasi Fluktuasi Beban Pada Trafo Distribusi ULP Bululawang Harrij Mukti K.; Rachmat Sutjipto; Vidiasih
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5187

Abstract

Transformer is a very important component in the distribution of electricity from the distribution substation to consumers. Overloading and underloading of transformers can lead to significant inefficiencies and increased losses in the electrical distribution system. Based on data measurement of the ULP Bululawang transformer in 2022, it was found that the C0177 transformer (100 KVA) was overloaded (88.4%) and the C0254 transformer (160 KVA) was underloaded (21.4%). Load forecasting for 2027 predicts that the C0177 transformer load will reach 107%, causing overheating, while the C0254 transformer will remain underloaded at 23.68%. To address these issues, a transformer mutation was proposed. This study aims to evaluate the effectiveness of transformer mutation in redistributing loads and improving efficiency. The method involved measuring transformer loads before and after mutation and using the Least Square method for load forecasting. Post-mutation measurements showed the C0177 transformer load reduced to 62.6% and the C0254 transformer load increased to 37%. These results indicate that the transformer mutation significantly balanced the load distribution. The study also adjusted the protection settings, including FCO, output cable, main switch, PHB-TR, and NH Fuse output cable. The findings suggest that transformer mutation can effectively address load imbalances, improve operational efficiency, and reduce power losses in the distribution system.
Evaluasi Ketidakseimbangan Beban Pada Penyulang Unicora Ahmad Hermawan; Ahmad Koimam; Rhezal Agung Ananto; Satria Luthfi Hermawan
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5191

Abstract

Load imbalance in electrical distribution transformers can lead to significant power losses and decreased efficiency in electrical distribution systems. This study focuses on the load imbalance problem at the Unicora feeder of PT PLN (Persero) ULP Singosari, which hinders optimal operational efficiency. The purpose of this research is to evaluate the extent of load imbalance, its impact on power losses, and the effectiveness of load balancing interventions in mitigating these losses. The methodology includes phase load measurements from February to September 2021, analysis of load imbalance, and power loss simulations using ETAP 12.6.0 software. The study's important findings indicate that the average load imbalance decreased from 34% to 21% after implementing load balancing interventions. Concurrently, power losses in the neutral conductor were reduced from 106.3 kW to 78.0 kW. ETAP simulations revealed a total power loss of 773.5 kW in the Unicora feeder, underscoring the significant impact of load imbalance on system efficiency. The implications of this research are crucial for operational practices at PT PLN (Persero) ULP Singosari. The findings demonstrate that effective load balancing can significantly enhance distribution efficiency, reduce operational costs, and improve the reliability of electricity provision. This study advocates for continuous monitoring and adaptive management of load distribution in electrical networks to maintain optimal performance and sustainability.
Inovasi Modul Monitoring Parameter Listrik Pada PHB-TR 400/230V Berbasis Mikrokontroller Rahma Nur Amalia; Ika Noer Syamsiana; Tresna Umar Syamsuri; Ana Mardiana
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5247

Abstract

The reliability of electrical energy distribution is paramount to continuously meet consumer demands. Effective maintenance of the distribution system, particularly the low voltage switchgear (PHB-TR), is essential to ensure this reliability. A significant challenge arises from the fact that many distribution substations are situated in remote or hard-to-access locations, complicating the maintenance process for technicians. This study aims to design and develop an innovative module for monitoring current and voltage, utilizing the Arduino Nano microcontroller, equipped with a PZEM sensor module and an I2C LCD display. The primary objective is to facilitate remote monitoring and enhance the efficiency of maintenance operations at these substations. The research methodology encompasses the design, simulation, and testing phases of the monitoring module applied to a 400/230 V PHB-TR. The module's performance was evaluated based on its accuracy in measuring current and voltage. The findings indicate that the developed module exhibits high accuracy, with an average current sensor error margin of 2.9% and a voltage sensor error margin of 1.3%. The implications of this research are significant for the field of electrical distribution maintenance. The implementation of this monitoring system can lead to substantial improvements in time and energy efficiency, as well as enhanced safety for maintenance personnel. Moreover, it facilitates real-time remote monitoring, which is particularly beneficial for substations located in challenging terrains. This innovation holds the potential to streamline maintenance processes and ensure a more reliable supply of electrical energy to consumers.
Evaluasi Kinerja Sistem Proteksi Penyulang Trawas PT. PLN (PERSERO) ULP Pandaan Satria Luthfi Hermawan; Hilman Rangga Nugraha Hermawan; Priya Surya Harijanto; Ahmad Hermawan
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5249

Abstract

The primary objective of this research was to minimize disruptions in the feeder at ULP Pandaan by analyzing the coordination between recloser outgoing and incoming feeders. This study addressed the frequent issue of recloser trips, which caused instability in power supply. The purpose of this research was to provide conclusions and solutions to mitigate these disruptions. The methodology involved a detailed analysis of OCR (Over Current Relay) settings for protective devices on Trawas feeder. This included measurements of primary current settings and TMS (Time Multiplier Setting) values using both standard inverse and normal inverse configurations. Specific settings, such as 25518 A for the Trawas Recloser primary current and a TMS of 0.07, were determined to yield optimal performance. Additional settings for the Outgoing CB (Circuit Breaker) (357061 A, TMS 0.04) and the Incoming CB (181865 A, TMS 1.0) were also established. The important findings revealed that these settings significantly enhanced the reliability of the protective devices, ensuring better coordination between the recloser and CB systems. The implications of this research were substantial, as the optimized settings were expected to reduce the frequency and impact of feeder disruptions. This improvement in system reliability directly benefited both the electricity provider, PT. PLN (Persert), and the consumers by providing a more stable and efficient power supply. In conclusion, this study offered a comprehensive analysis and practical solutions for enhancing the protection system's performance on the Trawas feeder, which could be applied to similar electrical distribution networks to achieve better stability and reliability.
Kontrol Motor Berbasis PID untuk Pompa Air di Miniatur Rumah Kaca Himawan, Helmy Mukti; Mustikasari, Vita Ria; Muhammad Fahmi Hakim
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5339

Abstract

Greenhouses are crucial in agriculture for enhancing crop yields by providing controlled environmental conditions. Efficient water management is a key challenge in conventional greenhouse systems, often leading to water wastage due to unmeasured soil moisture levels. This research aimed to design and implement a PID control system for water pumps in a miniature greenhouse to optimize water usage and maintain stable soil moisture and temperature levels. The methodology involved integrating PID control with sensors to monitor and adjust the water pump operation based on real-time soil moisture and temperature data. The study found that the PID-controlled system reduced the time to reach steady-state conditions from 650 ms to 600 ms, with no overshoot compared to systems without control. Additionally, the error in the PID system ranged from 0.89% to 2.32%. These findings suggest that PID control significantly enhances the efficiency and effectiveness of water usage in greenhouses, contributing to better crop management and resource conservation. The implications of this research are substantial for agricultural practices, as it demonstrates a viable solution for improving irrigation precision and overall greenhouse management.
Perancangan dan Analisis Tekno Ekonomi PLTS On-Grid System sebagai Supply Energi Listrik Masjid Al-Istiqamah Politeknik Negeri Jember Argo Tri Winnarni; Risse Entikaria Rachmanita
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.4609

Abstract

The increasing energy demand is directly proportional to the growing population and technological advancements. The energy needs in Indonesia largely rely on fossil fuels, which are limited and environmentally unfriendly due to their emission characteristics. The potential of solar energy in Indonesia is around 4.8 kWh/m2, making it a renewable and environmentally friendly energy source that can be utilized for Solar Power Plants (PLTS). The aim of this research is to design an on-grid PLTS system and conduct techno-economic analysis using PVSyst software. This design requires 14 Longi Solar/LR5-72HPH-550M solar panels and 1 Huawei SUN2000-6KTL-M1 inverter. The estimated electricity production is 10,852 kWh/year in the first year. The initial investment cost for this PLTS system is Rp. 120,343,517.00, with estimated savings over 25 years amounting to Rp. 270,115,412.00. Economically, based on the feasibility analysis using the LWBP tariff calculation method, the NPV is Rp. 2,174,707.00, BCR is 1.68, and PBP is 11.8 years. Meanwhile, based on the feasibility analysis using the LCoE calculation method, the NPV is Rp. 74,877,690.00, BCR is 2.61, and PBP is 7.5 years. Based on the conducted research, the construction of this PLTS is deemed feasible to be implemented.
Metode Kurva Batasan Energi Untuk Evaluasi Resiko Arc-flash Pada Sistem PLTU Wiharya, Chandra; Priya Surya Harijanto; Farrasdito Aulia Rizky
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.4732

Abstract

In an effort to determine the Personal Protective Equipment (PPE) required to protect against arc-flash hazards based on IEEE Std. 1584-2002, a simplified analysis technique was used with the energy limit curve method. The problem addressed was the potential inaccuracies in determining the required PPE level and maximum flash-protection distance when the traditional method does not precisely calculate the incident energy level and flash-protection limit. The purpose of this study was to evaluate a method that could be applied to various types of overcurrent protective devices in electrical systems, thus simplifying the arc-flash analysis. The method involved using the energy limit curve, which allows for quicker determination of the necessary PPE by plotting relay/fuse curves into the energy limit curve. This approach was implemented and tested at PLTU Paiton Unit 7 (PT. POMI). Important findings indicated that the energy limit curve method significantly reduced the time required to determine the appropriate PPE category compared to the IEEE 1584-2002 standard. The results showed that the process of determining the PPE category was more efficient, with fewer data requirements and shorter calculation times. The implications of this research suggest that the energy limit curve method can simplify arc-flash calculations for large industries with numerous buses, enhancing the overall safety protocols by providing a faster and potentially more accurate means of assessing arc-flash hazards and PPE requirements.
Desain dan Pengujian Pengaplikasian Omron CP1L sebagai Remote Emergency Shutdown pada Aset Cementing Siburian, Christian; Akhiriyanto, Novan; Ardianto, Valentino
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.5435

Abstract

PT. X, an oil and gas service company in Indonesia, has a client facing safety risks at one of PT Y’s cementing assets. The client requested the implementation of an emergency shutdown component to mitigate the risk of accidents at the site. The primary challenge was the potential operational safety failures during cementing operations, which could lead to serious incidents without additional safety measures. This study aims to design and implement an emergency shutdown system based on the Omron CP1L to enhance operational safety at the cementing asset. The RES system was developed through a process of requirement identification, design, integration, and testing, supported by relevant literature studies. The system’s design includes the selection of appropriate hardware and software, as well as the development of logic to execute the shutdown when PT Y’s crew presses the emergency push button. Testing results indicate that the RES functions with an average delay time ranging from 1.5 to 1.9 seconds. The conclusion from this study is that the RES system is effective in enhancing operational safety and minimizing risks at PT Y’s cementing asset.  

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