Distributed Optimal Generation Dispatch Considering Transmission Losses

Economically dispatching the generation is essential to the efficient operations of a power system. As an approximation to the nonconvex AC optimal power flow (ACOPF) problem, the convex DC optimal power flow (DCOPF) problem is used in many studies. In this paper, the DCOPF with transmission line losses (DCOPFL) is formulated to better approximate the ACOPF problem. A Cooperative Distributed Optimal Dispatch (CDOD) algorithm is proposed to solve the DCOPFL problem in a distributed manner. The convergence and correctness of the CDOD algorithm are verified through two representative case studies. The DCOPFL is also verified to have the smallest approximation error comparing with DCOPF and economic dispatch considering transmission losses (EDL) by taking ACOPF solution as reference.