Integrating Issues of Power System Scheduling and Optimal Power Flows Problem

This paper presents problem of integration of short-term power generation scheduling problem and optimal power flows. The task of short-term power generation scheduling in the power system is to minimize the total production costs, which should satisfy demand and required reserve in the system as well generation constraints of all units in the system. Generally the requirements for constraints such as the transmission network constraints, already incorporated in the formulation of problems, detailed models of the network are not considered in these problems. To solve this problem the multiphase iterative method is proposed. The basic idea of the multiphase iterative methods for solving the integrated problem-type short-term scheduling/OPF-problem is set schedule problem and OPF problem in a different optimization phases. The results of the first phase are used to change the parameters of second phase. In this way the problem is decomposed to standard short term generation scheduling problem and series of OPF problems, one for every hour. This paper proposed specific approach to obtaining primal feasible scheduling of generation units which can support primal solutions. Possible solutions which are in relation with these schedules can be obtained by solving OPF problems for each hour.