Space Charge Pulsed Electro Acoustic Method, Calibration for Flat Samples and Crosstalk Reduction for HVDC Cable Measurements
Guillermo Mier-Escurra (TU Delft - DC systems, Energy conversion & Storage)
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Abstract
The Pulsed Electro Acoustic Method (PEA) is a widely used method for the measurement of space charges in High Voltage (HV) dielectrics. This thesis aims to contribute to the optimization of the PEA method by being able to make measurements from different test setups comparable and enhance the reliability of the results interpretation. This work is divided in two main parts with different scopes. In the first part, the work is focused utilizing flat samples, in which the effects of the different electrode materials at the dielectric interface and the use of reference samples for measurement characterization is analyzed. In the second part of this work, the focus is on measurements at HVDC cables for which the effects of different pulsed voltage injection configurations are tested, with a special focus in reduction of the crosstalk between the applied pulse and the acoustic sensor. The obtained results contribute to optimize the application of the PEA method for measurements of the space charge phenomena in HVDC components.