Efficient economic dispatch technology adapted to inter-provincial and inter-regional centralized transactions

Under the background of the continuous expansion of the transaction scale in the electricity market, how to efficiently solve the large-scale economic dispatch model while considering the physical characteristics of the AC / DC power grid and ensuring the enforceability of the dispatch results is a key issue. Aiming at this problem, this paper proposes an efficient economic dispatch technology based on Benders decomposition method. Firstly, according to the characteristics of AC power flow model and DC steady-state operation model without cross-period coupling constraints, the original problem is decomposed into the main problem of multi-period DC power flow economic dispatch and the sub-problem of each single-period AC power flow security check. Then, taking the output of the unit and the transmission power of the DC line as the decision variables, the Benders feasible cut set is fed back to the main problem through the sub-problem, and the main and sub-problems are iteratively solved until convergence. Finally, the effectiveness of the proposed method is verified by the IEEE 5-bus system.