Economic Operation Scheme of Cascade Pump Station Group Under the Power Market Situation—Taking the Yellow River to Qingdao Project as an Example

To solve the problems of s arehigh operating costs and excessive electricity consumption of cascade water supply pump stations in large-scale water transfer projects, this paper develops three optimized operation models for pump station group. Model 1 aims to minimize the daily total electricity cost, Model 2 aims to minimize the daily total electricity consumption, and Model 3 considers both time-of-use electricity prices and regulation and storage of canal section. The dynamic programming algorithm was employed to solve the optimized models. Taking the cascade pump station group of the Yellow River to Qingdao Water Regulation Project in China as an example, application research was conducted under average daily pumping flow of 8 m3/s; 16 m3/s; 24 m3/s; and 32 m3/s. Results indicate that all models exhibit excellent economic performance. Among them, the best performance was achieved by the Model 3 scenario, which consumed 98,700 kWh, 195,600 kWh, 293,400 kWh, and 394,500 kWh of electricity, and reduced the operating costs by 37,100, 38,100, 34,300, and 4400 USD, respectively, compared with the fixed-flow condition.