Based on predicted electricenergy price

and taking maximization of profit as the target

a strategic decision model for startup and shutdown of units in the future operation period of a power plant has been put forward. At the same time

directing against the said mathematic model

improvements of traditional genetic algorithm have been made from many aspects

and the solution algorithm for this optimization problem being further deeply studied

and some examples of calculation being given. The said model has practical significance and reference value for power plants to workout reasonable quoted price strategy.