Design and Operation Strategy for Pumped Storage Power Plant with Large Water Head Variation

[摘要] The head of pumped storage power station is usually set in a small range. When the water head changes in a wide range, it will lead to the reduction of turbine power efficiency and the life of hydraulic turbines. However, the limit of the range of water head change will result in the waste of reservoir capacity and limit the daily power generation. In order to increase the variation of water head in the design of power station, a pumped storage power station using virtual constant pressure tank is proposed in this paper. The concept of hydraulic constant pressure network is introduced. A virtual constant pressure tank is used as a hydraulic accumulator in a hydraulic constant pressure network. A group of hydraulic cylinders with different area ratios are used as hydraulic transformers. The water head of the large change in the reservoir is transformed into the head of the small and medium range in the virtual constant pressure tank through the hydraulic transmission mechanism, and then the power and storage of the pump/water turbine will be carried out. It ensures the efficient operation of the turbine and increases the capacity of sustainable power generation.

[发布机构] School of Electrical and Electronic Engineering, North China Electric Power University, Beijing, China^1

[效力级别] 无线电电子学 [学科分类] 材料科学（综合）

[关键词] Constant pressure network;Daily power generations;Design and operations;Hydraulic cylinders;Hydraulic transformer;Pumped storage power station;Reservoir capacity;Sustainable power generation