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All Journal INFOKUM Jurnal Info Sains : Informatika dan Sains
Muhammad Erpandi Dalimunthe
Universitas Pembangunan Panca Budi, Medan, North Sumatera, Indonesia
Computer Science & IT

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Power Supply System Reliability Analysis at the TVRI Transmitter Station Sibolangit Uses UPS 40 kVa and 250 Kva Mustofa Achyar; Haris Gunawan; Muhammad Erpandi Dalimunthe
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to analyze the reliability of the power supply system at the Sibolangit TVRI Transmitter Station which uses Uninterruptible Power Supply (UPS) with a capacity of 40 kVA and 250 kVA as an important component in maintaining the operational continuity of the transmitter. A reliable power supply system is crucial to ensure broadcast quality and prevent service disruptions due to power supply failures. The methods used in this study include collecting UPS operation data through field monitoring, analyzing technical parameters such as Mean Time Between Failure (MTBF), Mean Time To Repair (MTTR), Availability, and comparing the performance of the two UPS units. Data were analyzed using statistical approaches and reliability engineering tools to evaluate the performance and failure patterns that occurred during the observation period. The results show that the 250 kVA UPS has a higher level of availability than the 40 kVA UPS, with an average MTBF value of XX hours and YY hours, respectively, and MTTR of AA hours and BB hours. The analysis also reveals the main factors that affect reliability, including the quality of the electricity supply from PLN, load conditions, and the implemented maintenance schedule. These findings provide technical recommendations regarding load management, improved preventive maintenance schedules, and risk mitigation strategies to improve power supply continuity, particularly for low-capacity UPS units. Thus, this study contributes to the understanding of power supply system reliability in broadcasting installations and provides a basis for planning for improving operational performance at the TVRI Sibolangit transmitter station.
Optimization Analysis of IoT-Based Load Monitoring for Early Fault Detection in PLN ULP Gebang’s Distribution Network Roy Marcelius Ober Gultom; Solly Aryza; Muhammad Erpandi Dalimunthe
INFOKUM Vol. 13 No. 06 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v13i06.2773

Abstract

This study aims to analyze and optimize an Internet of Things (IoT)-based load monitoring system for early fault detection in the electrical distribution network at PLN ULP Gebang. The system is developed to monitor electrical parameters—including current, voltage, power, and frequency—in real time using load sensors connected to a microcontroller, with data transmitted to a cloud platform via wireless communication. The collected data is then analyzed to identify anomalies that may indicate early signs of faults, such as phase imbalance, overcurrent, or voltage fluctuations. Experimental results demonstrate that the system can deliver early fault notifications with an accuracy of 92% and significantly reduce response time to field incidents. The implementation of this system has proven effective in improving power supply reliability and enhancing the operational efficiency of PLN ULP Gebang’s distribution personnel.
Performance Analysis of Adaptive Defense Schemes (ADS) in Protection and Reliability Systems of Electric Power Transmission Systems Tri Ismail Ricky Ramadhan; Solly Aryza; Muhammad Erpandi Dalimunthe
INFOKUM Vol. 14 No. 03 (2026): Infokum, May - June 2026
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v14i03.3092

Abstract

The reliability of the electric power transmission system is a crucial factor in ensuring the continuity of electrical energy distribution to customers. Disturbances in the transmission system can cause significant technical and economic losses. Therefore, the application of Adaptive Defense Schemes (ADS) was developed as an effort to improve the performance of the protection system and the reliability of the electric power transmission system. This study aims to analyze the performance of ADS on the Barikin-Tanjung bay line electric power transmission system and evaluate its technical and economic effectiveness. The disturbance data used include the number of disturbances, the duration of disturbances, and Energy Not Supplied (ENS) during the period 2015–2022, which is divided into the pre-implementation period of ADS (2015–2018) and post-implementation period of ADS (2019–2022). The Autoregressive Integrated Moving Average (ARIMA) method is used to analyze the characteristics of time series data and forecast disturbances in the period 2023–2026. The results of the analysis show that the implementation of ADS is able to reduce the number of disturbances, the duration of disturbances, and the ENS value significantly in the post-implementation period. The selected ARIMA models, namely ARIMA (2,1,1) for the number of disturbances, ARIMA (3,1,1) for the duration of disturbances, and ARIMA (2,1,1) for ENS, produced stable predictions with residuals without significant autocorrelation. In addition, the results of the economic analysis showed that the implementation of ADS was able to reduce the company's potential losses by more than 50% compared to the scenario without ADS. Thus, ADS has proven effective in improving the reliability of the electric power transmission system and is worthy of being recommended for implementation in other transmission lines with high levels of vulnerability.
Overgeneration Shedding Simulation Using Digsilent at the New Aurduri 500KV and Betung 275KV Extra High Voltage Substations Anggoro Indra Kusuma Atmaja; Rahmaniar Rahmaniar; Muhammad Erpandi Dalimunthe
INFOKUM Vol. 14 No. 03 (2026): Infokum, May - June 2026
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v14i03.3128

Abstract

The reliability of the electric power system is greatly influenced by the system's ability to maintain the loading of the main equipment within safe limits during a disturbance. In the Sumbagselteng system, conductor disturbances have the potential to cause excessive loads on the Inter Bus Transformer (IBT) due to the concentration of generation in the South Sumatra region. Therefore, the implementation of the Over Generation Shedding (OGS) scheme is required as part of the defense scheme to protect the IBT from overloading conditions. This study aims to analyze the effectiveness of the OGS scheme in limiting the fault current and improving the dynamic stability of the system. The method used is a dynamic simulation using DigSILENT software with a short circuit fault scenario and a two-stage generator shedding based on definite time characteristics. The parameters analyzed include the IBT current, loading percentage, rotor angle, logarithmic decrement, and damping ratio. The simulation results show that the IBT current increases to around 1800 A with a loading reaching 110–133% during the disturbance. After the 340 MW generator shedding in two stages, the current drops to around 490 A and the loading returns below 65%. The damping ratio ranged from 0.017 to 0.069, indicating the system remained stable with improved damping. The OGS scheme proved effective in reducing IBT loading and improving system stability under disturbance conditions.
Co-Authors Anggoro Indra Kusuma Atmaja Haris Gunawan Mustofa Achyar Rahmaniar Rahmaniar Roy Marcelius Ober Gultom Solly Aryza Tri Ismail Ricky Ramadhan