This paper derives the small-signal model of gridforming (GFM) inverters considering the presence of shunt capacitor in the power grid. It is pointed out that the shunt capacitor introduces two additional resonant peaks in the loop gain of power control loops, in addition to the fundamentalfrequency resonant peak that is identified in the prior art. Based on the findings, the active damping control is modified to dampen all three resonant peaks to guarantee the stable operation of GFM inverters. Finally, simulation and experimental tests are carried out to corroborate the theoretical analysis.
EV Charging is expected to be a significant load on the grid in the future. But they can also be a part of the solution to grid violations. As the amount of renewable energy generation increases, there is a large amount of power flowing in the reverse direction in the distribution network, which is undesirable. To reduce this, EVs can charge at strategically located "Grid Management Parking Lots". Here the EV charging power level varies in accordance with the amount of capacity available in the grid. This is a win-win situation for both parties, the grid operator and the EV owner, as the grid operator reduces the amount of violations in the grid and the EV owner has his/her vehicle charged sooner. I.
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