三峡水电站水轮发电机组技术供水方案研究

三峡水电站上游水库的水位变幅较大，水轮发电机组技术供水系统的用水量也很大，若按一般惯例套用机组供水方案进行设计，则难以满足电站技术水要求。本文对三峡水电站机组可能选用的５种供水方式进行深入的分析，优选出３种供水方式，并在此基础上，组合设计出６种可行的技术供水方案，通过进一步比选，推荐三峡水电站机组采用可调式射流泵和组合式减压阀混合供水。这套方案采用了目前世界上该行业较蝗技术。通过对方案的技术特性和

Study on cooling water supply schemes for Three Gorges Hydropower Station

in view of great variation in water level in Three Gorges reservoir and great water consumption for cooling water supply system of hydrogenerator units,it is difficult to satisfy the requirements for supplying hydrogenerator units with cooling water if a conventional water supply scheme is indiscriminately used in design.Five possible cooling water supply schemes for hydrogenerator units of Three Gorges power station are deeply analysed in this paper and three of them are chosen through optimization and comparison.Six feasible compound water supply schemes are designed from the three schemes.Through further comparison,a compound water supply scheme combining a adjustable jet pump with a composite relief valve is recommended for Three Gorges power station.The recommended scheme adopts advanced technique in this field in the world. Analysis of the characteristics and reliability of this scheme shows that the recommended scheme can fully satisfy water supply requirements for safe and stable operation of the hydrogenertor units of Three Gorges Hydropower Station.