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Dielectric response measurements are an important maintenance and diagnostic tool for large oil filled power transformers. There are numerous operational disadvantages to performing dielectric response measurements offline, such as the need to disconnect the transformer from the grid, the time taken for the tests and the risk posed to the network. There is therefore a need to develop techniques to...
Dielectric response measurements are an important maintenance and diagnostic tool for large oil filled power transformers. Regardless of if the measurements being performed in the time domain or in the frequency domain, the developed tools rely on the dielectric response being linear with excitation voltage magnitude. This paper details work done in an initial investigation into the measurement of...
Frequency Domain Spectroscopy (FDS) is one of the major techniques used for determining the condition of the cellulose based paper and pressboard components in large oil/paper insulated power transformers. This technique typically makes use of a sinusoidal voltage source swept from 0.1 mHz to 1 kHz. The excitation test voltage source used must meet certain characteristics, such as high output voltage,...
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