The Discrete Mix-programming Model for Electricity Transaction and its Decomposing-coordinating Algorithm

The electric power industry has implemented the reform of separating generation from transmission. generation sell the electricity only by its bidding, and transmission buy the electricity for the customs with the goal of the lowest charge. When the hydropower and thermal power both exist in a power system, to save coal and protect environment, the hydropower resource should be used firstly, and then the thermal power is to be used when the hydropower can´t meet the load. This paper builds a discrete mix-programming model for electricity transaction in hydrothermal electric power market and presents a decomposing-cooperation algorithm to solve the optimization model