关键词: 抽水蓄能, 尾水机组段, 排气阀, 改造

Abstract: To eliminate the malfunction of the air-release valve in the gate chamber not being able to close or close early when filling the tail water unit section of Changlongshan pumped storage power station, this article briefly analyzes the structure and weight of the floating bucket, as well as calculates the release area and the average release speed of key parts in the valve. By doing so, a transformation method is proposed under existing conditions, which is to increase the diameter of the floating bucket and release hole, and cancel the floating bucket counterweight. After multiple on-site tests, the optimized parameters of the air-release valve have been obtained. Since then, the water filling and air release process of the tailrace gate chamber have become safe and reliable.

Key words:  , pumped storage, tail water unit section, air-release valve, transformation