Monitoring of power transformers by mechanical oscillations
Condition-based asset management is gaining importance, which leads to a prospering of power transformer monitoring. Different methods, for example the dissolved-gas-analysis and oil-aging evaluation, partial discharge measurements and also frequency response analysis have been established to determine the status of the transformer's electric insulation and windings. The last part of this chapter correlates vibrations to direct current (DC) components running through transformers' grounded star points impacting the magnetic operational status. In addition, vibration measurements are used to estimate the resulting changes of transformer's noise due to DC which gains importance for power transformers and in particular low-noise transformers.
Monitoring of power transformers by mechanical oscillations, Page 1 of 2
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