The simulation of the economic effect of power system structure including renewable sources of energy

The optimal load of the power system (PS) sources depends on the structure of committing sources, that might affect the generation costs in the given power network. The expected costs of energy for the given wholesale providers and power plants are calculated using some simulation procedures, assuming the varied structure of sources- types of power plants. In the short time period the results support the real time operation of PS. Over a longer time they enable the definition of the optimal policy of changing or modernizing the power structure. Operation of an example set of the discussed power plants, including all types of primary energy sources and converters, including also the pumped storage hydroelectric plant (PSHP) and wind power plants (WPP), is described in accordance with the balance of the load in the PS. Upon the base of the developed simulator, the mode of operation the sources load is based on the minimization of the cost of generated energy. The structure of the simulator (Sroczan 2005) consists of some procedures which simulate the generation policy and procedures checking the economic quality of balancing the generation and demand of electric power and energy in the discussed PS.