Abstract
It is widely known that there arises high frequency pressure oscillation in the water conduits of pumped storage power plant as one of the transient phenomena of pump-turbines, of which propagation along pipe lines has not been theoretically identified. With regard to the rock-bored pressure tunnels adopted for most pumped-storage plants, the studies by M. Fanelli and L. Suo, specifying that the wave speed and its attenuation depend on exciting frequency, is applicable to clarify above-mentioned mechanisms. Measured data of pressure oscillation and its propagation at the Okukiyotsu No. 2 pumped storage plant are introduced to examine the theory.
