新西兰马赖泰１号电站甩负荷后及充水期间，Ｇ１号机组的压力钢管发生了显著的共振。试验与阻抗分析表明，共振模式是二次谐波共振、压力节在钢管中点，封闭的两端即进水闸门和水轮机导叶处的压力相位相反。已查明进水闸门的止水是共振的自激源。本文论述了为找出共振状态及消除激励所进行的研究和试验。 During the load rejection and filling of the Malayai 1 power station in New Zealand, there was a significant resonance of the pressure pipe in G1. The experiment and impedance analysis show that the resonance mode is the second harmonic resonance, the pressure section is at the midpoint of the steel pipe, and the pressure phases at the two ends of the closed gate, that is, the inlet gate and the turbine vane are opposite in phase. It has been ascertained that the water stop of the intake gate is a self-excited source of resonance. This paper discusses the research and experiments to find the resonance state and to eliminate the excitement.