On Wide-Area Control of Solar-Integrated DAE Models of Power Grids

Today's power systems are controlled based on decades of experience with the fundamentals of physics-based properties of synchronous generators. Future power grids however must cope with the increasing penetration of renewable energy resources (RERs) and require a much more sophisticated control architecture. This is because RERs are formed by uncertain solar- and wind-based resources and are connected to the grid via advanced (power electronics)based technologies. These are, in short, far more complex to control than traditional generators. RERs also do not provide inertia to damp frequency oscillations, and thus the grid's operating point changes frequently causing deterioration in the overall transient stability of the power system. This short paper proposes a robust wide-area controller for an advanced power system model having a higher order generator model, advanced (power electronics)-based solar plants model, and composite load dynamics. The simulation studies show that the proposed controller can significantly improve the transient stability of the system against uncertainty from load demand and renewables.