Adaptive switching based control mechanism for mitigating frequency oscillations due to large load drops in low inertia systems*

This paper provides an overview of a simple adaptive switching-based control mechanism that could be utilized for frequency control in grid following inverters for the PSCAD software platform. The models are meant for system integration research, including transient stability evaluations of power systems with significant inverter-based generating penetration. To confirm the model’s functionality, it is integrated into an IEEE 9-bus system with low inertia. As grid-following inverters require a reference, a synchronous generator is utilized as the grid-forming device and provides backup power. A key part of the simulation is the scaling factor which can be used to simulate any number of inverters through PSCAD.