Frequency-Dependent Criteria for Mitigating Effects of Transmission Line Terminated with Linear Loads
thesisposted on 2017-10-22, 00:00 authored by Nikhil Kumar
Rapid advancements in power semiconductor devices has accelerated the growth of power electronics system to the point that, high frequency distributed power system (HFDPS) has become a practical reality, provided that transmission-line effects are mitigated. Benefits of HFDPS can be realized in applications ranging from nanogrids, smart-buildings, all-electric warships and microgrids. However, its usage has been limited to applications where the choice of path does not affect the power quality or the signal integrity due to transmission-line effects a signal encounters as it propagates through the transmission medium. In the past, researchers have shown different approaches to mitigate the transmission-line effects by using impedance matching networks/adjusting transmission-line length or employing active compensation along the transmission line to ensure signal integrity. In this Dissertation, a frequency-dependent criteria is developed for a HFDPS, feeding linear load(s), which can mitigate transmission-line effects under periodic conditions and facilitate high frequency power transfer through long transmission-line lengths. Selection of transmission frequency is of critical importance while designing a HFDPS; otherwise it aggravates the system performance by introducing distortion and offsetting signal integrity in form of ringing, crosstalk, reflection and ground bounce. In addition, the applicability of the developed criteria has been explored for single-input single-output (SISO), single-input multi-output (SIMO) and multi-input multi-output (MIMO) topologies along with its validation using simulation and experimental results.