Electricity Today T&D Magazine – Transformer Technologies Winter 2025 Special Edition

In this special edition, we focus on the key technologies, diagnostic methods, and maintenance practices that support transformer health and system reliability. From high-voltage insulation testing to bushing condition assessment, each article highlights proven techniques used by utilities to identify deterioration, prevent failures, and reduce unplanned outages.

This issue covers advanced approaches such as Partial Discharge (PD) and Electromagnetic Interference (EMI) diagnostics, online bushing monitoring, Dissolved Gas Analysis (DGA), Frequency Response Analysis (FRA), and emerging tools including fiber-optic temperature sensing, dielectric frequency response, and acoustic monitoring. These methods help detect insulation breakdown, mechanical deformation, hotspots, moisture ingress, and other issues affecting transformer performance.

We also examine industry challenges such as long lead times, manufacturing bottlenecks, and global transformer supply constraints, as well as the growing need for fire-resistant designs, fire barriers, and enhanced safety measures in modern substations. In addition, the adoption of synthetic and natural ester transformer oils is discussed for their fire resistance, biodegradability, and operational benefits.

Together, these articles provide a comprehensive look at the diagnostic techniques, monitoring strategies, and safety solutions shaping transformer maintenance and asset management today.

Read Our Feature Articles:

• A New Approach to High Voltage Insulation System Testing

• Understanding Bushing Failure Modes and Monitoring for Optimal Transformer Health

• Mitigating Transformer Failures: Advanced Monitoring and Maintenance Strategies

• Navigating the Transformer Supply Crunch: Strategies for Utilities Amidst Global Shortages

• Enhancing Transformer Resilience: Fire Barriers and Safety Measures in Modern Substations

• The Role of Transformer Oil Alternatives in Improving Safety and Environmental Sustainability