Active power electronic transformer as a power conditioner for nonlinear loads

Smart grid structure could be very complex. Active power electronic transformers, composing an important part of the smart grid, could have many roles in that stochastic and variable system. The modular structure (consisting of many base modules) is the key to obtain the needed flexibility. The goal of this research was to develop a base module of the active power electronic transformer to be used later as a standard building block in more complex systems. To guarantee the power quality on the HV grid side, the base module has power factor correction functionality. The performance of the base module was verified by computer-aided simulations.