水轮机导叶适时关闭规律初探

Preliminary Study on Real-Time Closing Law of Guide Vane of Hydroturbine

鉴于目前在有些水电站采用的两段或三段导叶关闭方式,虽然能够在一定范围内较好的控制过渡过程中的压力上升和转速上升,但随着机组容量和水轮机水头范围的增大,这些关闭方式有时不能有效地控制机组在过渡过程中的稳定性。为此提出了根据水轮机工作参数的变化来探讨实时改变导叶关闭的方式。

Although the two-step or three-step closing pattern of guide-vanes could control the pressure rising and rotational speed rising in transient process under a certain degree, yet it couldn't control the stability of hydro-generating unit in transient process effectively when the capacity and working head of hydroturbine are increased, so in accordance with the variation of operating parameters of hydroturbine, the real-time closing pattern is proposed.