Online Monitoring of Hydrogen and Moisture in Oil of Power Transformers
Power transformers are critical components in any electricity grid. Age, increased load levels, and network failures all take their toll on transformers, leading to an increased risk of unpredictable faults and outages.
Online and real-time condition monitoring of power transformers can keep them operating safely and with maximum efficiency, while supporting the planning of timely maintenance actions that can extend operational lifetime and prevent unexpected and costly outages.
Moisture reduces the insulating properties of transformer oil, resulting in more rapid aging of the transformer. Traditionally, oil moisture readings have been taken at periodic intervals. However, because moisture levels can change rapidly, periodic sampling is not sufficient.
Dissolved gas levels in transformer oil indicate the existence of a fault and the rate of change in these levels is used to determine its severity.