Power-based Control for Microgrids and Extreme Fast Charging Stations with Low-Harmonic Current Content in the Medium Voltage Power Grid

Abstract

The energy and transport sectors are responsible for a large portion of the emission of polluting gases into the atmosphere. Less polluting forms of energy and the electrification of the vehicle fleets are solutions to reduce this emission. In this context, the effect of high penetrion of distributed generation resources (DERs) and extreme fast charging (XFC) stations in the power grid is more evident. This paper proposes the use of the power-based control (PBC) to manage microgrids and XFC stations connected to the medium-voltage (MV) power grid. With the proposed control, the stations can mitigate the effect of the insertion of intermittent sources on the power system. Simulation results show that the active power dispatchability is achieved at the point of common coupling (PCC) with the proposed strategy, smoothing the power demand by 41 %. In such a scenario, the current total demand distortion (TDD) in the XFC stations is 0.19% using the Zero Harmonic Distortion (ZHD) converter.