Unified Network Management System (UNMS) for Power SyStem Communication Network: A Roadmap for Future Grid Communication Management

Very Small Aperture Terminal (VSAT)—and heterogeneous technologies such as SDH, PDH, and emerging MPLS-TP/IP-based systems supplied by multiple vendors. This diversity has resulted in the proliferation of proprietary Network Management Systems (NMS) and Element

Management Systems (EMS) with limited interoperability and varying support for interface

Protocols. Consequently, operators have been forced to rely on multiple NMS/EMS platforms for routine network monitoring, fault management, and provisioning, leading to operational inefficiencies, increased Mean Time to Repair (MTTR), and poor fault correlation across layers.

To address these challenges, a Unified Network Management System (UNMS) has been conceptualized, designed, and implemented for the Southern Region power communication network. The UNMS provides centralized, real-time monitoring and management of multivendor communication equipment supporting SCADA (Supervisory Control and Data

Acquisition), PMU (Phasor measurement Unit), protection signalling, voice, and operational data for Load despatch centres , central utilities, and state utilities. Acting as a “Manager of

Managers,” the UNMS integrates data from diverse EMS/NMS platforms and standalone network elements through standardized protocols and NBIs (northbound interfaces), delivering a single operational view of the entire communication infrastructure.

The system architecture comprises four logical layers—Network, Collection, Aggregation and

Processing, and Presentation—deployed in a resilient Data Centre–Disaster Recovery (DC– DR) configuration. Key functional modules include Inventory and Topology Management,

Alarm Correlation, Performance Aggregation, and a Configuration Management Module that enables end-to-end circuit creation across heterogeneous technologies. This supports provisioning of Cross-connection like E1 circuits, 64kbps data circuits, Ethernet services, including VLAN tagging and protection schemes, while offering topology discovery and route optimization capabilities. By validating resource availability and implementing policy-based routing decisions, the UNMS ensures efficient service provisioning and compliance with regulatory standards.

Operational benefits of the UNMS include faster fault detection and isolation through advanced

Root Cause Analysis (RCA), automated trouble ticketing, and real-time performance monitoring. The system also generates regulatory outputs such as automated availability reports by correlating outages with predefined communication system definitions, ensuring compliance with the Central Electricity Authority’s (a statutory body) mandate of 99.9% network availability. Additionally, historical data retention for up to seven years supports trend analysis, predictive maintenance, and audit requirements.

The implementation of UNMS has transformed the Southern Region’s communication network from a fragmented, reactive environment into a centralized, intelligence-driven framework.

This unified approach significantly reduces Mean Time to Repair (MTTR), enhances cybersecurity posture, and provides scalability for future grid requirements. As the roadmap progresses, integration with AI/ML for predictive maintenance, automated diagnostics, and national-level UNMS consolidation will further strengthen the resilience and reliability of

India’s power system communication backbone and ensure overall Grid Stability.