Designing a compensator unit for high voltage measurement / Saharudin Mohd Taib

This thesis describes the studies and research of the development of a compensating unit that will be used to calibrate any attenuation or distortion of an impulse voltage waveshape during transmission. The compensating unit is modeled by an R-C circuit configuration, which is able to suppress reflection or unwanted signal. By adding this compensating unit to the set up for high voltage measurement, precise measurement can be achieved for the purposes of testing and research works. Simulations of the transmission line modeling as well as R-C circuit configuration had been conducted to observe the theoretical performance of the individual circuit. The project also involved in fabricating a transmission cable. Comparisons were made between a commercial standard probe cable, which is a one-meter in length of tektronix oscilloscope model TDA 420S, and the fabricated cable. From the results, it could be concluded that for short length of cable, the latter achieved same commercial standard. The experiment found out that with the addition of one meter of the transmission cable which was connected between the oscilloscope and the developed compensator will introduce further distortion on the output waveshape therefore it was decided that the developed compensator would be attached directly to the oscilloscope.