我国采用的“当水电站压力引水道的水流惯性时间常数T_w超过2～2.5秒时,需在管道上设置调压井”的规定,其目的是使水锤压力变化(ζ)和机组速率上升(β)不超过规定值,保证水轮机自动调节系统的稳定和有一定的调节品质。很多同志在总结经验的基础上提出,当ζ和β不超过规定值的情况下,能否修订T_w≤2.5秒的标准问题。对此,本 Our country adopted “when the water flow inertia time constant T_w of the pressure diversion channel of the hydropower station exceeds 2 ~ 2.5 seconds, it is required to set the surge shaft in the pipeline”, the purpose of which is to make the water hammer pressure change (ζ) and the unit rate increase β) does not exceed the specified value, to ensure the turbine automatic adjustment system stability and a certain degree of adjustment quality. Many comrades put forward on the basis of summing up experience, whether the standard problem of T_w≤2.5 seconds can be revised when ζ and β do not exceed the specified value. In this regard, Ben