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Non invasive monitoring of transformers using the frequency response from controlled transient signals

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Figure

Figure 1. a) Uncontrolled transient signals and b) controlled transient signals.
Figure 2. Pulse injection setup for the transformer  under test. Injection circuit Voltage Source Transformer under test OLAD High Voltage Capacitor BTC  (1)1.2 Mathematical tools for transient signals
Figure 3b shows how the bandwidth of  the measured signal is divided during the  decomposition process.
Figure 5. Experimental setup for On-Line FRA from controlled transient signals.
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