Summary

Protective devices in oil-immersed power transformers such as sudden pressure relay,

Buchholtz Relay, pressure relief valve, oil level indicator, and winding thermometer in power transformers and reactors are critical for operational reliability. However, recurrent failures due to moisture ingress have led to twenty-two (22) unintended outages over the past five years, resulting in 34 hours of unavailability and 101 MWh of Energy Not Supplied (ENS). This paper presents a comprehensive strategy combining Root Cause Analysis (RCA), prescriptive analytics, descriptive analytics, environmental correlation, and reliability modeling to optimize maintenance and improve asset performance of protective devices in oil-immersed power transformers [1]. This targeted approach enables utilities to allocate resources effectively, mitigate high-risk scenarios, and enhance system resilience, ultimately aligning reliability management with real-world operating conditions.

Additional informations

Publication type Session Materials
Reference A2_12048_2026
Publication year
Publisher CIGRE
Country Colombia
Study committees
File size 587 KB
Price for non member 30 €
Price for member 30 €

Authors

CANTOR Elkin - Intercolombia; CARMONA Sandra - intercolombia; LOZADA Ivan - Intercolombia

Optimization of reliability and safety in power transformers and reactors through advanced monitoring and data analytics