Diversity and multiplicity of factors affecting the exploitation from power systems, makes completely impossible to solve this problem. Therefore, the optimal planning problem in system exploitation is decomposed into several sub-problems. One of exploitation sub-problems from power systems is economic dispatch of production on system units in order to meet the consumption needs. This is an optimization problem in real power systems, with great dimensions and multiple constraints including economic dispatch of system, transfer network restrictions, rate of increase and decrease in production, prohibited areas of operation units, spinning reserve storage of systems, loading effects of steam valves, multi-fuel production units. A suitable algorithm based on probabilistic search methods has... been proposed in order to solve the proposed model effectively in the future. An experimental system with complex solution space is used in order to demonstrate the effectiveness of proposed method and new model and it is compared with some of the latest techniques for solving problem. In this paper, MATLAB software is used for above reviews.