With the share of electric vehicles on the European market and roads increasing, the charging infrastructure linked to this has to keep growing as well. The utility grid will soon become overloaded if this infrastructure entirely depends on it. A possible solution to reduce the stress on the grid is to use local renewable energy sources (solar, wind) to charge these electric vehicles. However, the intermittent nature of these sources requires an energy storage system, like a battery pack, to ensure that the charging demand can be satisfied. This configuration, comprised of a local energy source, a storage system, connected or not connected to the grid, is called a nanogrid. The energy storage, energy source and load and/or grid of the nanogrid operate at different voltages and currents, this means power electronic converters are required to ensure the proper energy management of the system. This thesis focuses on power electronics (PE) interfaces development of a nanogrid, basically the choice of PE topology and converters, control design of the converters and implementation of maximum power point tracking (MPPT) using simulation tool MATLAB Simulink®. A level 3 K-factor compensation is used to control the 3-phase interleaved converters and a perturb and observe technique is used for MPPT. Finally, the results of the simulation show the correct functioning of the system in all steady-state and transient operations, which ensures the viability of the converters topology and control in a nanogrid system and can be developed as future work.
|Datum Prijs||3 sep 2019|