Optimal power allocation for cooperative relaying system in smart grid

摘要

In this study, cooperative relaying is proposed to reduce the packets loss rate in the communications between the utility company and the consumers. We establish a cost model based on the statistical analysis with the regulation errors of a direct load control method in smart grid. Specifically, we model the average cost of generation-side regulation using the combinational cost of the generating units. The problem of minimizing the average cost to the utility company is convex, and we use the Fibonacci search method to obtain the globally optimal power allocation for the relay. Numerical results demonstrate that the proposed algorithm can converge to the globally optimal relay power under the amplify-and-forward relaying strategy, and the average cost to the utility company can be reduced significantly.