  There is an ongoing trend of reduction in short circuit power at the grid
connection point due to decommissioning of synchronous generation plants
causing system strength issues in wind power plants. Whereas wind power plant
rating and export cable length are increasing, further weakening the system
strength and accompanied by stability challenges. Under such a scenario, a grid
forming control demonstrated to operate in a weaker system has value creation
potential for application in wind turbine generators. In addition, the grid
forming control can also enable a wind power plant to operate in islanded mode,
provide inertially and phase jump active power support. However, the
application of grid forming control has challenges because grid forming control
applied to a power converter (GFC) has a voltage source behavior and does not
stiffly control the grid side active power and thus requires a separate current
limiting mechanism. However, there could be potential challenges in maintaining
the synchronism of GFC when the current limit is triggered, particularly during
the grid voltage phase jump event. Modeling and capturing such a phenomenon is
a challenge in a wind farm with many wind turbines. To that end, this paper
investigates the modeling adequacy of the aggregated GFC-WF to a single GF-WTG
of total WF rating in capturing GFC-WF dynamics. The challenges related to loss
of synchronization stability when one or more wind turbine generators enter
current limited operation during a grid phase jump events are also evaluated in
this paper.
