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Transformer oil-paper insulation system is continuously subjected to thermal stress which is a key factor inducing its deterioration. Dielectric response of oil-paper insulation in frequency domain is being gradually used by power utilities for assessing the condition of transformer oil-paper insulation system, and the Frequency Domain Spectroscopy (FDS) measurement is a promising method. It is important...
A new sensorless technique for monitoring the condition of inverter dc link aluminum electrolytic capacitors based on equivalent series resistance, ESR, and capacitance, C, estimation is proposed in this paper. The main concept of the proposed method is to estimate ESR and C of the capacitor using the inverter whenever the motor is stopped. The parameters are estimated from the dc link voltage and...
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