Abstract
In this paper, fluid behavior in conduit system is discussed in order to newly introduce AFC operation (operation of large-amplitude forced oscillation) into existing typical hydro-power plants with surge tank. And a dimensionless general-purpose diagram to help determine the capability of existing facilities is provided. Only three pieces of data on existing power plants are needed for this discussion: gross head, design water pressure, and head loss in headrace tunnel. Furthermore, non-linear forced oscillation equations for fluid movement in conduit system during AFC operation are studied in terms of chaotic dynamics. As a result, it is found that there is no occurrence of chaos in the range of practical use.
