Failure detection, investigation and root cause analysis of 420KV Line Reactor in POWERGRID

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.