Comparative Study Of Security Economic Dispatch Model And Its Optimization Algorithm In Power System

As an important branch of economic dispatch, security constrained economic dispacth(SED) is the main means of power system short-term safe operation, and has important application in practical operation. On the base of model simplification, this paper uses primal-dual interior point algorithm and Dantzig-Wolf(DW) algorithm to solve the SED problem respectively, explores the practical algorithm of SED, and lay a foundation of the future work. The characteristics of SED models under different dispatch modes are analyzed, and the different dispatch modes are contrast studied through relative specifications. The objective function of SED model considering valve point effect is non-convexity, and is difficult to be solved. Acoording to this problem, a decoupling algorithm combined with DW and PSO is proposed is this paper. And the SED models with non-smooth objective function can be solved effectively. In order to consider the effects of system losses on SED, a dynamic loss modification strategy is proposed in this paper, and the optimization result approaches the ACOPF algorithm on the premise of convergence.