在具有长压力引水管道的电站中,为防止发电机在突然甩负荷的情况下产生过大的水锤压力,以减少长压力引水管道的水锤冲击,往往是设置调压井、调压塔或调压阀,借以达到确保长压力引水管道的安全运行。但是,对于小水电站来说,根据设置调压井的判别条件(即∑L·V>15H、T_W=∑L·V/g·H_0或Td=4T_W等),则有的电站 In a power station with a long-pressure water-diversion pipeline, in order to prevent the generator from generating excessive water hammer pressure under a sudden load rejection to reduce the water hammer impact of the long-pressure water diversion pipeline, a surge tank and a pressure regulating tower are often provided Or pressure regulating valve, so as to ensure the safe operation of long-pressure diversion pipelines. However, for small hydropower stations, according to the criteria for setting surge tanks (ie, ΣL · V> 15H, T_W = ΣL · V / g · H_0 or Td = 4T_W, etc.)