SIOMG — PLN UP3 Yogyakarta

SIOMG — PLN UP3 Yogyakarta

A system that enables field officers to efficiently enter transformer measurement results, analyze load conditions, and monitor substations, fully integrated with ArcGIS asset mapping.

Overview

SIOMG (Online Information System for Substation Management) is used by field personnel across UP3 Yogyakarta to record transformer measurement results, perform load analysis, and monitor substation status via a web administration portal. All entries are synchronized in real time and linked to mapped assets for better planning and operational decisions.

ArcGIS Integration

The system connects to ArcGIS to display substation locations, network overlays, and link measurement data directly to asset objects. This provides a clear visualization of load conditions per location.

Technology Stack

Mobile Application (Android)

• Language: Kotlin
• Architecture: MVVM with Clean Architecture
• Offline Mode: Local caching with background synchronization when online

Web Administration

• Framework: Next.js (React)
• Backend: Node.js
• Database: PostgreSQL
• API: RESTful
• Integration: ArcGIS API

Key Features

1. Substation Search by transformer number with streamlined measurement data entry
2. Measurement Results List with filtering by measurement date
3. Measurement Status Dashboard: completed/pending, load classification, ULP, feeder
4. Historical Measurements with per-substation/transformer history
5. Measurement Charts for trend and load analysis
6. Offline Mode on Android to operate without connectivity, with auto-sync on reconnect
7. Web Admin for monitoring, validation, and reporting

Notes

This application is deployed for PLN UP3 Yogyakarta. Additional process details and screenshots can be added as needed.