The distributed software system was adopted to establish the plant-level optimal load distribution system for thermal power plants.Furthermore

the system function modules were designed

and the optimal load distribution algorithm model was built on the basis of dynamic programming method.The application results showed that

when the unit total planning load was low(about 900MW to 1 200MW)

the load distributed for No.3unit was higher than that for No.4 unit;when the unit total planning load was high(about 1 300MW to 1 800 MW)

the situation turned to the opposite.Thus

the economic dispatching of the unit was realized.