Optimalization of the DC Sources Resonant Coupling Converter

Abstract

This thesis is aimed at the development and the related simulations and verification of the control methods for the multi-port DC-DC sources coupling converter, which is in a process of development at the VSB – Technical University of Ostrava. The stated converter includes x-ports of inputs/outputs in general and it contains a novelty power structure working with a changing couple of LC resonant elements enabling the originate of the variable fully soft switched current loops. The merit of this thesis is the development of a new control method based on the mathematic model, which was developed for the proposed converter. This model is founded on the analytical description of processes in progress inside the power structure. The transfer function was derived applying the stated analysis and the new control methods, which enable to work with open–loop control or with a very low amplify of feedback, were developed. All the developed and proposed control methods were verified within simulations and the available prototype converter. The newly developed control methods enhance the already known possibilities of controlling the power transferred via the proposed type of converter. The supposed field of use can be found in a coupling of energy storage systems cooperating with renewable energy sources.