Authors: S. T. Lavender, C. R. Donnelly
ICOLD Montreal Congress Papers, June 16-20, 2003
Abstract
Any hydro power station, or electrically interconnected set of stations (i.e., a hydro power system), has a defined firm energy capability. Inherent in this definition is an assumption of the magnitude of hydrologic risk of failure to meet the power system “firm” demand. Typically, a critical drought sequence of inflows having a 1:10-yr or 1:20-yr return period is adopted for the evaluation of the firm energy yield (i.e., a 90% or 95% reliability standard) without consideration of the economic merit of a greater or lesser level of reliability.
