Performance assessment of an optimal load control algorithm for providing contingency service

In prior work, the Distributed Gradient Projection (DGP) algorithm was proposed to allow loads or load aggregators to provide contingency service to the grid using local frequency measurements. The DGP algorithm was shown to perform well in linear simulations. The goal of this work is to evaluate the performance of the DGP algorithm in more realistic scenarios and its robustness to issues of practical implementation, such as time delay, model mismatch, measurement noise, and stochastic disturbance. Simulation results from the IEEE 39-bus system indicate that the DGP algorithm performs well in mitigating the effects of contingencies and that it is robust to issues of practical implementation.