A long-term joint optimization dispatching model of inter-basin reservoirs was established

by adjusting the POADPSA-DDDP hybrid algorithm for the four seasonal regulating basins（ Xiang

Zi

Yuan and Li rivers） and the hydropower stations located above in Hunan Province. The amount of power generation based on joint dispatching compensation benefit is analyzed. The results show that the average annual generating capacity of the four basins is increased by 57 million k Wh compared with the individual optimization in each basin

and the compensation benefit is considerable. The research results provide some guiding significance for rational operation of the operation mode of the four river basins and improve the comprehensive utilization rate of hydropower stations

and provide an example for enterprises to reduce the cost in the fierce market competition.