Paralleling of dab converter using the gyrator theory
This work presents mathematical analysis, simulations and experimental results of the parallel connection of DAB converters. The gyrator technique is used to model the DAB converter and to determine a simple equivalent circuit. As the DAB converter is a natural gyrator, the paralleling can be easily done, and the control logic is simplified. A simple current sharing strategy is done by applying the same phase-shift angle between the converters. This technique can be used to connect various DAB converters in a dc microgrid system or to supply power to an isolated load. The main contribution of this study is to show converters that natural gyrator behaves, as in the case of DAB converter may be associated in parallel in a simple manner.
Summary In the pilot study, a new geomodeling technology is presented for developing 3D heterogonous geomodels for Athabasca McMurray (MCMR) oil sands. The geomodels were used to simulate SAGD thermal recovery. Both conventional SAGD completions and SAGD with ICD completions were tested. The simulation results show that for a heterogeneous Athabasca McMurray oil sand reservoir, the ICD completion technology enhances oil production and reduces steam consumption. As a result, the economics of SAGD recovery from the heterogeneous sands is improved.