Method of controlling operation of multistage hydraulic machines

摘要

A multistage hydraulic machine in which respective pressure stages are connected in series through return passages and the highest and lowest pressure stages are provided with movable guide vanes the degrees of openings of which are variable is controlled in load adjustment or in response to the change of a static head under a steady operation condition by controlling the degrees of openings of the movable guide vanes of the highest and lowest pressure stages in accordance with several modes.