Study on the effect of combined operation of pumped storage and conventional hydropower on the lower reservoir level
Based on conventional hydropower reservoirs,the construction of pumped storage pow-er stations can increase the system's peak regulating capacity and relieve the absorption pressure of new energy,and it also can affect the operation process of conventional hydropower.In view of the influence of the pumped storage power station on the intra-day water level fluctuation of con-ventional hydropower reservoirs in a short time scale,a short-term joint operation optimization model for pumped storage and conventional hydropower is constructed,with the variation process of water level of conventional hydropower reservoirs in a typical operation mode of pumped stor-age analyzed.Examples of cascade reservoirs in the upper reaches of the Yellow River and Waerang pumped storage power station in Guinan are studied.The results show that using the model takes into account the hydraulic connection and electric connection between pumped storage and conventional hydropower,and adapts to but is not limited to the operation mode of"one-pump-one-generate"scheme,or"one-pump-two-generate"scheme.Compared with the non-pumped storage power station,the pumped storage power station will change the amplitude of the original cascade reservoir water level after operation(increased by about 1.07～1.33m).Genera-tion time and pumping time are the main factors affecting the variation of lower reservoir water level.The research results can provide a technical reference for the influence of combined con-sumption of new energy by pumped storage and conventional hydropower.
pumped storage power stationconventional hydropowerwater level processopti-mal scheduling
万方数据
维普
