MikoĊaj Koszel
supervisor: Roman Barlik
Connecting numerous, dispersed, unstable sources of electricity to the grid is often the cause of disturbances in the operation of the grid and deterioration of the quality of electrical energy. One way to minimize the growing problems is to use DC microgrids. However, despite the many advantages of the proposed solutions, they are not widespread, mainly due to the difficulties occurring in the case of installations with a power of tens or hundreds of kW. The key components of these systems are power electronic converters, ensuring highly efficient and stable electricity flow and its appropriate quality. One of the widely developed DC/DC topologies is the dual active bridge (DAB). Currently, optimization algorithms and artificial intelligence are increasingly used in the design and control of converters.
An important issue is the optimization of power distribution between converters connected in parallel, aimed at minimizing power losses. Among others, the poster presents the optimization results based on the SLSQP algorithm. Another key aspect of the DC microgrid operation is the stabilization of the main DC bus voltage. In the case of island operation, it must be ensured by the DC / DC converter control system. It is important here to maintain an appropriate and stabilized voltage level, regardless of the disturbances introduced by the AC grid and the step changes in the energy flow in the microgrid. he main challenges and methods of solving them are highlighted.