Based on operation features of thermal power plants

and taking optimal cost of power generation as the target

a mathema-tic model for optimal load despatch among block units in the power plant has been established

and optimal solution of the model being found through dynamic planning method

obtaining economic load despatch scheme of each block unit.On this basis

and adjusting method for economic load dispatch schemes based on comprehensive evaluation results for status of each main operating equipment in the block unit has been put forward

realizing load despatch under consideration of economic behavior and safety at the same time.