Abstract
This work presents the important steps in developing and optimizing a Pulsed Electroacoustic (PEA) system. The aim is to investigate silicone rubbers (LSR) with different amount of nanofillers. Therefore, the influence of the nanofillers on the acoustic behavior such as the acoustic impedance and the speed of sound are investigated. A detailed description of the acoustic detection unit is provided. To allow the measurement at different absolute temperatures and also at temperature gradients the electrodes are temperature controlled. Reference measurements are performed to give a better and more accurate temperature profile estimation inside the samples. The influence of temperature on the attenuation and dispersion factors of different LSR samples is outlined. A final procedure for signal processing is presented to determine the correct space charge distribution.
Highlights
High voltage direct current (HVDC) power transmission is becoming increasingly competitive to high voltage alternating current (HVAC) power transmission, especially for bulk power transmission over long distances or large overlay systems
The goal is to investigate the influence of nanoscale Carbon Black (CB) for different filler concentrations
It was found that for LSR both attenuation and dispersion must be considered. For this purpose both factors were analyzed at different temperature profiles and for different filler concentrations
Summary
High voltage direct current (HVDC) power transmission is becoming increasingly competitive to high voltage alternating current (HVAC) power transmission, especially for bulk power transmission over long distances or large overlay systems. Numerous publications exist reporting on the space charge behavior of XLPE with and without nanofillers. For silicone rubbers several requirements on the PEA setup itself and on the signal post processing must be considered. The purpose of this paper is to present a PEA setup suitable for the investigation of silicone rubbers and a proper signal post processing method. The ground electrode El2 is the cover of an aluminium box containing the acoustic detection unit. The noise generated by the LTPG is used as a trigger signal for the DSO For this purpose a common RG58 coaxial cable is placed near the LTPG to pick up the noise (see Figure 1)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
