Summary
Power Grid Corporation of India Limited (POWERGRID) operates a vast fleet of transformers and reactors, comprising about 4000 units, including 2200 reactors as on date. Despite the implementation of advanced monitoring systems and best-in-class preventive maintenance practices, equipment failures still occur due to a variety of factors. Transformer/Reactor failure analysis [1] is a multifaceted and resource-intensive task that demands a structured methodology to pinpoint root causes, assess internal damage, and implement corrective actions. The process is often hindered by limited access to internal components, challenges in interpreting diagnostic data, and time constraints due to operational outages.
Read more Read lessThis paper presents a case study wherein recent cluster of failures involving five 420 kV, 21
MVAR, 1-Phase line reactors at a GIS substation prompted a comprehensive investigation, including fault detection, root cause analysis (RCA), design review and corrective measures to prevent recurrence [3].
The fault identification was achieved through interpretation of disturbance recorder data, nonintrusive diagnostic techniques followed by detailed internal inspection. This combined approach enabled precise localization and characterization of the fault, facilitating timely decision-making and effective remediation. These failures occurred in a geographically challenging, hilly terrain, necessitating on-site repair under controlled conditions, as a result, the units were restored to service rapidly, minimizing downtime and operational impact with minimally affecting system reliability and availability.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | A2_10248_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | India |
| Study committees | |
| File size | 2 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
RANJAN* Rajiv - POWERGRID India; JAIN Rohit Kumar - POWERGRID India; YADAV PRS - POWERGRID India; MANAS Richik - POWERGRID India
Keywords
