Method of and apparatus for controlling by-pass valve

摘要

Provided is a method of controlling a by-pass valve in which the discharge valve is opened or closed in an interlocked relation woth a turbine flow regulating means such as wicket gates of a water-turbine in order to bypass a stream of water with respect to the turbine in synchronism with the movement of wicket gates, thereby decreasing pressure fluctuation in a penstock of the turbine during transient conditions of operation, and is eventually closed when the wicket gates are held in an equilibrium state, thereby eliminating prolonged wasting of the available water.