ABSTRACT

The study area selected for the transient analysis is Pallivasal hydroelectric power plant which is located in Munnar in the Idukki District. The Munnar region is situated at an altitude of 1500-2500 m above sea level and has an average rainfall of 275 cm. The hydraulic system consists of a head race tunnel of 3396 m long and a pressure shaft of 2500 mm diameter. The head race tunnel and pressure shaft are common to both powerhouses. The pressure shaft is bifurcated into two penstocks of 2000 mm and 1600 mm diameter to feed the extension and existing power houses. These penstocks are further divided in such a way that it has two numbers of 1500 mm diameter for the extension scheme and three numbers of 460 mm diameter and three numbers of 583 mm diameter for the existing generating scheme. Figure 1 shows the layout of Pallivasal hydroelectric power plant.