Summary
Transmission lines constitute a critical component of power system networks, enabling bulk transfer of electricity from generation sources to load centres while ensuring system stability, security, and reliability. Transmission lines traverse diverse and often challenging terrains, including hilly regions, river crossings, forests, coastal belts, and densely populated areas. Over their operational life, these assets are subjected to a wide range of environmental and external stresses such as cyclones, thunderstorms, heavy rainfall, etc. Failures of high-voltage transmission lines or associated components leads to severe impact on the power system, potentially leading to large-scale disturbances and degradation of overall grid reliability.
Read more Read lessConsidering the scale, diversity, and criticality of transmission assets, uniform inspection across the entire network are neither technically optimal nor economically viable. This necessitates the adoption of a structured, risk-based maintenance strategy that prioritizes resources based on asset criticality and condition. In this context, the paper presents a Reliability-Centred
Maintenance (RCM) framework implemented for 278,509 transmission line towers across 564 high-voltage lines transmission line assets, aimed at improving asset inspection and enhancing system reliability. The proposed framework enables a systematic transition from conventional time-based maintenance practices to reliability-centred inspection and maintenance regimes.
Inspection scope and periodicity are determined through a systematic evaluation of the probability of failure (Pof) and the impact of failure (Iof) associated with each transmission line. A conventional scoring and weightage methodology is employed to compute a severity index, which is subsequently mapped onto a risk matrix to classify assets into five risk categories.
Also to ensure comprehensive coverage and avoid under-inspection seasonality- and vulnerability (SAV) based inspection methodology has been formulated. The results demonstrate that the RCM framework enables optimized inspection planning, prioritized maintenance interventions, efficient resource utilization, and reduction in unplanned outages, thereby enhancing the reliability, safety, and resilience of large-scale power transmission systems.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B2_10383_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | India |
| Study committees | |
| File size | 487 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
PAUL* Devaprasad - POWERGRID, India; JOSE Joseph George - POWERGRID, India; JHA Deo Nath - POWERGRID, India; KALORIA Mahendra Kumar - POWERGRID, India; SAHU Kuleshwar - POWERGRID, India; SRIVASTAVA Naveen - POWERGRID, India
Keywords
Strategic, Enhancing, Transmission, Line, Performance, Grid, Reliability
