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All Journal BRIDGE: The Multidisciplinary Research Portal Journal of Electrical Engineering and Informatics (JEEI)
Agus Salim Wardana
Sekolah Tinggi Teknologi Nusantara Lampung
Engineering

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IoT-Based Real-Time Monitoring and Energy Consumption Analysis for Residential Electrical Systems Ferdiansyah; Agus Salim Wardana
BRIDGE : The Multidisciplinary Research Portal Vol. 3 No. 1 (2025): JANUARY (I)
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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Abstract

The growing demand for efficient and transparent household energy management has increased the need for accurate, real-time electricity monitoring systems. This study presents the design, implementation, and experimental validation of an Internet of Things (IoT)-based system for real-time monitoring and analysis of residential electrical energy consumption. The proposed system integrates voltage and current sensing with wireless data transmission to measure voltage, current, instantaneous power, energy consumption (kWh), power factor, and electricity cost estimation, with data displayed locally and remotely through a cloud-based platform. An experimental methodology was employed to evaluate system performance using various household appliances representing resistive and inductive loads. Measurement accuracy was assessed by comparison with calibrated reference instruments, yielding an average voltage error of 0.30% and current error of 0.28%, indicating high precision suitable for residential applications. The results reveal significant variation in energy consumption across appliances, highlighting inefficient loads with disproportionate energy usage. The system demonstrates stable data synchronization between local and remote interfaces with acceptable transmission latency, and incorporates automated load control to support demand-side energy management. This study contributes to the field of smart energy systems by providing a cost-effective, accurate, and scalable IoT-based solution for appliance-level energy monitoring and consumption analysis. The proposed approach offers practical insights for data-driven energy conservation, supports predictive energy management strategies, and aligns with global efforts toward sustainable and intelligent residential power systems.
Analysis of Transformer Oil Maintenance Management in Electrical Power Distribution Systems Agus Salim Wardana
Journal of Electrical Engineering and Informatics (JEEI) Vol. 1 No. 1 (2026): FEBRUARY (I)
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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Maintenance management is a critical technical and managerial approach to ensuring the reliability and sustainability of electrical power distribution systems, particularly through effective transformer oil maintenance. Transformer oil performs dual functions as an electrical insulating medium and a cooling agent; therefore, its degradation can significantly reduce transformer performance and operational reliability. This study analyzes the implementation of transformer oil maintenance management in distribution transformers within an electrical power distribution system using a field research approach with a descriptive–evaluative design. Data were collected through structured interviews, direct field observations, and a review of technical maintenance documents. The analysis focuses on the physical, chemical, and electrical characteristics of transformer oil, as well as the maintenance strategies applied, including preventive maintenance, corrective actions, and scheduled oil replacement. The results indicate that a structured transformer oil maintenance management framework contributes to maintaining transformer reliability, supporting continuous system operation, minimizing operational risks, and extending the economic service life of distribution transformers. These findings underscore the importance of condition-oriented maintenance management as an integral component of asset management in electrical power distribution systems.
Co-Authors Ferdiansyah