A Study of Three Phase and Single Phase High Frequency Distribution Systems
Final rept. 1 Mar 1987-30 Sep 1988
TOLEDO UNIV OH DEPT OF ELECTRICAL ENGINEERING
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The purpose of this research was to investigate the feasibility of multiphase high frequency power distribution systems driven by Schwartz converters. The two systems to be studied are a single phase parallel module cascaded Schwartz converter. The single phase version consists of two power conditioning stages. The first stage contains a single Schwartz converter which operates in a variable frequency mode and acts as a regulated dc power supply. This mode of operation is used to maintain a regulated output voltage for the second stage of the system. The second stage consists of three Schwartz converters operated at a fixed switching frequency with the input and output of the converters connected in parallel. This arrangement produces an ac transmission system with a fixed frequency, regulated amplitude output voltage. The three phase version also consists of two power conditioning stages. The first stage is exactly the same as the one for the single phase version. The second stage uses three Schwartz converters operated on a fixed switching frequency with a phase angle displacement of or - 120 degrees between adjacent phases. The converter inputs of second stage are connected in parallel and the outputs are connected in a three phase wye y configuration. This arrangement produces a three phase ac transmission system with a fixed frequency, regulated voltage. Keywords Series resonant inverter High frequency power distribution High frequency power conditioning.
- Electric Power Production and Distribution