Optimal dispatch based on fitness function for pumped-storage hydropower

An optimal joint dispatch model is built for the power system containing pumped-storage hydropower, wind farm and nuclear station, which takes the total operational cost as its objective. An algorithm based on fitness function is proposed to solve the model. Research shows that, the effect of load shifting by pumped-storage units is excellent, with the deduction up to 1.212% of total power system cost and 60.456% of carbon emission cost respectively; when the transmission capacity of pumped-storage units is adequate and that of wind farm is limited, the benefit of load shifting by pumped-storage unit is the best, with the lowest total power system cost and carbon emission cost.